BACKGROUND

[0001] From about the first quarter of the 20th century, the cigarette-making industry provided cigarettes with a rod-shaped filter attached to a tobacco rod. First, manually attached and then, from the early 1950's, mechanically attached filters became a standard component of a cigarette. The cigarette industry experimented with multi-component cigarettes and filters starting from the early 1960's. Relevant means for manufacturing such products have been revealed, e.g. in Molins invention US3080871, followed by US3131612, US3267820, US3267821, etc.

[0002] This and other methods and devices are discussed e.g. in Philip Morris EP1763306, highlighting various imperfections and shortcomings. This document reveals an apparatus and a method of maintaining alignment of segments in the stream of aligned segments by means of suction, or has a plurality of spaced apart separators for maintaining the alignment of segments in the stream of aligned segments, or both. Suction preventing relative movement of the segments is applied through the holes in filter segment transporting wheels, holding the segments in position as they are transferred to a continuous paper web for downstream processing. However, this arrangement allows loose segments in transit between the preceding transporting wheel and the following transporting wheel of the apparatus to remain floating in the air, jostling adjacent segments and/or the transporting means, as they become released from the suction of the preceding wheel but are not yet in the suction range of the following transporting wheel. Further, for at least some of the segment arrangements, some or all of the segments are inconsistently mechanically supported by the spacers on the circumference of the transporting wheels. Since the aligned segments are of different length, density, structure, etc., and additionally, they are manufactured within upstream production tolerances, imposing random discrepancies between them, they behave differently when in the transfer zone between the transporting wheels. Consequently, twofold transition of the loose segments between the transporting wheels in the apparatus results in random, jerky relative longitudinal movement of the segments, and displacement against one another. This results in minute, yet highly undesirable imperfections in segment alignment when discharged at the exit from the apparatus onto the continuous paper web, for downstream processing. The effect is particularly pronounced at real production speeds, where a few thousand segments are handled a minute. As compared to previous methods, the imperfections in longitudinal segment alignments were reduced but still do not allow for meeting todays quality standards of rejecting off-specification products and maintaining waste production losses. Moreover, due to the use of suction for maintaining alignment of segments during transportation towards downstream processing, this arrangement does not allow for handling fragile, low density and/or highly porous segments made of e.g. non- wrapped low-density cellulose acetate. Further, this arrangement does not allow for buffering and or further advantageous processing of the segments to be carried out at the latest stage, and just before forming and sealing a continuous, endless rod of multi-segment rod-like articles as well known in the industry and to personnel skilled in the art.

[0003] Still further, EP2210509(A1) discloses a method of compacting, wrapping and cutting components of a rod-like articles wherein at least one of the components is a non-cleanly- cuttable component like a combustible heat source or fuel element, for example a carbonaceous heat source that remains in direct contact with the component transporting means, e.g. drums or wheels. In the disclosed method and apparatus, suction is used to hold the components, and known vacuum transfer techniques are used to transfer the components between drums. Since the revealed method requires suction or vacuum for transporting components, it is risky when transporting active powder-containing segments, e.g. heat sources, and also not suitable for transporting fragile, easily deformable, brittle components of the rod-like articles. The revealed method of compacting combustible heat source components or other chemically active compounds of the rod-like articles boosts the risk of inter-product and intra-product contamination affecting product quality, percentage of waste and overall productivity.

[0004] Also, newer methods and apparatuses described in, e.g. EP2633769, US8475348 or EP2628399, EP2653044, EP2636322, etc., disclose principles and methods of manufacturing multi-component filter rods by means of various arrangements of filter segment transfer mechanisms. Moreover, numerous patent applications within the tobacco industry reveal mechanisms and methods of forming and transferring rod-like articles, specifically filter and/or cigarette rods using a variety of drum or wheel arrangements, e.g.: GB447779, GB477908, GB662309, GB709810, GB770173, GB915203, GB1351619, GB1476931, GB1438838, WO2013076750, etc.

[0005] Until the end of the 20th century, simple, single-segment filters constituted the majority of filters produced in the tobacco industry. Over the last two decades however, more and more complex filter specifications have been developed, including multi-component, multi- segment filters, consisting of segments precisely positioned relative to the adjacent segments, with such arrangements being fitted in the final filter attached to a cigarette or to another product meant for altering physical and organoleptic properties of smoke or, generally, air mixtures passing through such articles. Hence, there is a need for developing a means of reliably manufacturing increasingly advanced and demanding multi-component filters that are frequently referred to as composite or combined filter rods. [0006] Currently, filter specifications use a range of filter segments that include, cellulose acetate of specific density and physical structure, with such rod material being wrapped in filter paper wrapper known as plug wrap, or formed as a rod-like article without wrapping in the plug wrap (so called non-wrapped acetate), non-cellulose acetate fibrous materials, particulate materials of specific absorption and filtration properties, heat energy sources, fragrance, taste and/or other sensory attributes-modifying articles, foreign articles, e.g. liquid-containing capsules and solid objects including shaped tubular objects, bio-decomposition catalytic substances, etc. Examples of such articles are disclosed in EP0880904, US4714082, US5819751, US5040551, US8528567, WO2011042175, WO2012000646, WO2013068081, EP1972213, EP2462822, etc.

[0007] Thus, in order to administer such substances in any required combination, and align them into a continuous rod-like article in a precisely pre-determined and recurrent manner, not affecting quality of any of the finished filter components, and with highly repeatable overall quality of the final filter product, an apparatus and method of achieving these goals is described in the disclosed invention.

BRIEF DESCRPTION OF THE INVENTION

[0008] In one exemplary embodiment, an apparatus and method for buffering and processing a plurality of rod-like articles used in the manufacture of cigarette filters and in the manufacture of multi-segment rod-like articles may be disclosed. For example, the apparatus and method may be used for treating and altering physical properties of multi-segment filters, and organoleptic properties of air mixtures passing through such articles. An example of such apparatus may be disclosed in US 8475348. [0009] In another exemplary embodiment, an apparatus and method of manufacturing multi- component rod-like filtration articles and also, rod-like articles for adjusting the alignment of rod-like articles desired for downstream processing may be disclosed. The present invention may further allow for providing additional substances in a series of actions, as well as changes applied to all, or selected components of the multi-component or final product, between entering and leaving the apparatus towards downstream processing. In general, such final products may be manufactured for the purpose of treating and/or altering properties of air mixtures and therefore, they may be referred to as, for example, rod-like articles instead of simply filters.

BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Advantages of embodiments of the present invention will be apparent from the following detailed description of the exemplary embodiments. The following detailed description should be considered in conjunction with the accompanying figures in which:

[0011] Figure 1 is an exemplary embodiment of an initial alignment of rod-like article segments.

[0012] Figure 2a is an exemplary embodiment of an arrangement of rod-like articles in a continuous composite article.

[0013] Figure 2b is an exemplary embodiment of an arrangement of rod-like articles in a recess composite article.

[0014] Figure 3 is an exemplary embodiment of an arrangement of the rotary portions in an apparatus for buffering and processing rod-like articles.

[0015] Figure 4 is an exemplary embodiment of an arrangement of the rod-like articles inlet area to the apparatus. [0016] Figure 5 is an exemplary embodiment of an arrangement of the rod-like articles inlet area to the apparatus.

[0017] Figure 6a is an exemplary embodiment of inlet rotary portion in vertical arrangement in relation to the belt feeding the rod-like articles.

[0018] Figure 6b is an exemplary embodiment of inlet rotary portion in angular arrangement in relation to the belt feeding the rod-like articles.

[0019] Figure 6c is an exemplary embodiment of inlet rotary portion in angular arrangement in relation to an alternative arrangement of the belt(s) feeding the rod-like articles.

[0020] Figure 7a is a cross sectional view of an exemplary application of at least one process, e.g. suction, applied at a radius, through an opening in the vicinity of the rod-like article.

[0021] Figure 7b is a front view of an exemplary application of at least one process, e.g. suction through an opening, in the vicinity of the rod-like article.

[0022] Figure 7c is a cross sectional view of another exemplary application of at least one process, e.g. suction, applied at a radius, through an opening in the vicinity of the rod-like article.

[0023] Figure 7d is a cross sectional view of an exemplary application of supplementary processing means.

[0024] Figure 8a is an exemplary embodiment of rotary portions with side guards protecting selected rod segments against applied supplementary processing means.

[0025] Figure 8b is another exemplary embodiment of rotary portions with adjustable side guards protecting selected rod segments against applied supplementary processing means.

[0026] Figure 8c is another exemplary embodiment of an arrangement of side guards on rotary portion, protecting selected rod segments against applied supplementary processing means. [0027] Figure 9 is an exemplary embodiment of the apparatus exit arrangement of rod-like articles towards downstream processing.

[0028] Figure 10 is another exemplary embodiment of an arrangement of an intermediate rotary portion in the apparatus.

[0029] Figure 11 is an exemplary schematic view of a variable capacity buffer.

[0030] Figure 12a is an exemplary side view of another exemplary embodiment of an apparatus showing rotary portions arranged for extended buffering, additional treatment and/or feeding supplementary articles into the stream of rod-like articles fed through the inlet rotary portion.

[0031] Figure 12b is an exemplary top view of another exemplary embodiment of the apparatus showing rotary portions arranged for extended buffering, additional treatment and/or feeding supplementary articles into the stream of rod-like articles fed through the inlet rotary portion.

[0032] Figure 12c is an exemplary side view of another exemplary arrangement of the apparatus showing rotary portions arranged at an angle facilitating extended buffering, additional treatment and/or feeding supplementary articles through a feeder into the stream of rod-like articles fed through the inlet rotary portion.

[0033] Figure 13 is an exemplary side view of another exemplary embodiment of the apparatus showing rotary portions rotating about axes that are perpendicular to each other.

DETAILED DESCRIPTION OF THE INVENTION

[0034] Aspects of the present invention are disclosed in the following description and related figures directed to specific embodiments of the invention. Those skilled in the art will recognize that alternate embodiments may be devised without departing from the spirit or the scope of the claims. Additionally, well-known elements of exemplary embodiments of the invention will not be described in detail or will be omitted so as not to obscure the relevant details of the invention.

[0035] As used herein, the word "exemplary" means "serving as an example, instance or illustration." The embodiments described herein are not limiting, but rather are exemplary only. It should be understood that the described embodiment are not necessarily to be construed as preferred or advantageous over other embodiments. Moreover, the terms "embodiments of the invention", "embodiments" or "invention" do not require that all embodiments of the invention include the discussed feature, advantage or mode of operation.

[0036] Throughout the current description of the invention, commonly accepted terms may be utilized. For example, "processing" may be understood as applying forces, media, substances or mixtures of thereof to rod-like articles during their transit through the apparatus to, for example, adjust their properties prior to forming a final rod-like product. Intensity of rod-like article interaction with the processing may be proportional to the time the rod-like articles are exposed to the processing. In addition, "buffering" may be used as separating two inlet and exit areas or otherwise adjusting filter rod transit time through the apparatus, providing adjustable time and space required for processing.

[0037] Figure 1 may show an initial alignment of rod-like article segments (1, 2, 3) on a combining and feeding belt (10), prior to entering apparatus (Al). Every different segment or rod-like article (1, 2, 3) is positioned on the belt (10) by preceding, separate devices (not shown); the segments being separated with air gaps (4, 5, 6) kept consistently in-between the segments.

[0038] Referring generally to Figure 2a, an arrangement of rod-like articles in a continuous composite article, showing continuous rod cutting positions (43) for obtaining triple, four-up articles in downstream processing (22) may be shown. The rod-like articles (1, 2, 3) may be aligned together in a pre-determined sequence, for specific filtration purposes or for altering physical and organoleptic properties and air mixtures. The example may show components of a typical combined filter having a first segment (1) made of e.g. cellulose acetate or an air gap (for making 'recess', semi-triple filters), a second segment (2) made of e.g. a mixture of cellulose acetate and loose particulate material, e.g. high-absorption charcoal powder, and a third segment (3) made of e.g. a mixture of cellulose acetate and fragrance releasing substances.

[0039] Referring now to Figure 2b, an arrangement of rod-like articles in a recess composite article upon exit from the apparatus, showing hollow sections, also known as 'cavities', made of air gaps (7) as well as the rod cutting positions (43) for obtaining four-up articles in downstream processing (not shown). The set-up shown in the Figure 2b is another example of a multi- component filter arrangement that is based on the example shown in Figure 2a with the difference being the air gap section (7) created on purpose between adjacent segments (2, 3) and having a precisely defined length. Such filters with the air gap section between other segments are commonly referred to as cavity filters.

[0040] Figure 3 may show a first embodiment of the apparatus (Al) for buffering and processing rod-like articles. The apparatus may have inlet rotary portion (Wl), intermediate rotary portion (W2), exit rotary portion (W3) and the frame of the apparatus (Al) allowing desired fixing of the rotary portions (Wl, W2, W3). Moreover, Figure 3 reveals exemplary locations of process zones (Zl, Z2, Z2A, Z3) in the apparatus (Al) allowing application of supplementary processing means, e.g. suction, gas vapors, electromagnetic radiation, etc., through the openings (12, 12'). In order to ensure efficient processing of specific combinations of rod-like articles (1, 2, 3), an angular length of the process zones is adjustable, and some or all of them may be joined, as shown in Figure 7. Additionally, at least one of the process zones (Zl, Z2, Z2A, Z3) may be sealed against the other process zones so that various gas atmospheres (gases or vapors) and other means can be applied at a required pressure, e.g. underpressure or overpressure, specific to the treatment applied in the process zone.

[0041] According to the current invention, the apparatus in is part of the technology of making multi-component rod-like articles described in e.g. EP2633769, US8475348, etc. Once the rodlike articles are aligned in a required manner on the feeding belt (10), the alignment remains fixed until a final, multi-component rod is sealed and cut downstream the apparatus (Al). Figure 4 shows an inlet to the apparatus (Al) and an initial exemplary arrangement of the rod-like articles in relation to the inlet rotary portion (Wl) and the separators (15, 16). The feeding belt (10) is driven by the drive roller (32) and travels at linear speed (VB while the inlet rotary portion (Wl), driven independently from the feeding belt, revolves at angular speed (ωΐ) adjusted to maintain linear speed (V at the pitch diameter of the inlet rotary portion (Wl). The two linear speeds may be adjusted such that the linear speed (VB of the feeding belt (10) is higher than the linear speed (Vwi) at the pitch diameter of the inlet rotary portion (Wl). Such setting may result in the back side of the separator (15) to work as a decelerator to the rod-like articles (1, 2, 3) being continuously fed to the apparatus (Al) and minimizing or removing the initial air gaps (4, 5, 6) from between the inlet rod-like articles (1, 2, 3). As the inlet rotary portion (Wl) revolves over the angle (δ), between two subsequent separators, a required number of the rod-like articles may be collected in the processing compartment (23), between the separators (15, 16).

[0042] Figure 5 shows an exemplary subsequent phase of the process, when one of the processing compartments (23) is filled with rod-like articles (1, 2, 3) on the way to downstream processing. Since suction is not applied through the rotary portions (Wl, W2, W3) to hold the rod-like articles (1, 2, 3) in place in the processing compartments (23) when in transit through the apparatus (Al), the rod-like articles may be subject to inertia forces due to angular movement of the rotary portion (Wl) and friction forces between the rod-like articles (1, 2, 3), the driving rotary portion (Wl) and the sliding guide (35). Additionally, since the rod-like articles (1, 2, 3) are manufactured to production tolerances, meaning that they randomly differ in length, weight, etc., between each other, this results in inconsistent forces acting on every rod-like article (1, 2, 3) and finally, in random spacing (4', 5', 6') between the rod-like segments (1, 2, 3) and the separators (15, 16).

[0043] Figures 6a-c may show exemplary design varieties of the inlet rotary portion (Wl). Figure 6a shows the arrangement where its planar axis (8) remains vertical and the rotary portion revolves about its horizontal axis (9). Figures 6b and 6c show alternative arrangements of the inlet assembly to the apparatus (Al) where the inlet rotary portion (Wl) revolves about axis (9) at an angle (a), and the peripheral profile of the rotary portion (Wl) is modified accordingly, as in the attached drawings. Modifications of the peripheral profile of the rotary portion (Wl) may be implemented to minimize mutual mechanical interaction forces between the inlet rotary portion (Wl) and individual rod-like articles (1, 2, 3), especially those of fragile structure, e.g. non-wrapped cellulose acetate segments, segments of irregular outer shape and/or porous materials containing embedded particulate substances. However, rotary portions (Wl, W2, W3) of modified peripheral profile, especially profiled to obtain a bevel shape of one or all of the rotary portions (Wl, W2, W3) may alternatively be used in at least one of the embodiments of the apparatus, described further, for example in Figure 12.

[0044] Before rod-like articles (1, 2, 3) are transferred for further processing from the inlet rotary portion (Wl) to the second rotary portion (W2), they may pass by the first processing zone (Zl). Figure 7a shows a schematic arrangement of the rod-like articles (1, 2, 3), the inlet rotary portion (Wl) and the opening (12), constituting the processing zone. If required, the opening (12) may extend its angular length over an angle (βΐ), as shown for example in Figure 7b. Through the opening (12, 12'), a supplementary processing means, e.g. suction, gas vapors, electromagnetic radiation, etc. can be administered transversely (11) to the transfer direction of the rod-like articles (1, 2, 3). Moreover, the openings (12, 12') may be of variable height (Hi, H ₂ ) at radius (Rsi, !½) relative to the rotary portion (Wl, W2, W3). In order to intensify processing effect, the angular shape of the openings (12, 12') may vary over their angular length, represented by the angle (βΐ). Depending on the actual combination of supplementary processing means required for processing rod-like articles (1, 2, 3), the assembly (24) that enables administration of the process may remain stationary in relation to the rotary portions (Wl, W2, W3) or may rotate at an angular speed synchronised with the rotary portions (Wl, W2, W3). Bearing in mind systematically increasing number of complex and technically challenging number of production specifications for the rod-like articles for treating air mixtures, the arrangement shown schematically in Figure 7a can be modified, for example as shown in Figure 7d, with additional assemblies (24'), arranged in proximity of another side of one, two or all rotary portions (Wl, W2, W3). Such arrangement of the assemblies (24, 24') and the rotary portions (Wl, W2, W3) between them, allows for even more advantageously intensive and precise administration of supplementary processing means, with one assembly (24') controlling supply (11 ') and the symmetrically positioned, mirror assembly (24) receiving or controlling removal (11) of the supplementary processing means from the process zones (Zl, ..., Z3).

[0045] An example of a practical application of the revealed arrangement of the opening or openings (12, 12') and the rotary portions (Wl, W2, W3) is application of controlled atmosphere through suction (11) being exerted through the opening (12), transversely to the transfer direction of the rod-like articles (1, 2, 3) and independently of the rotary portions (Wl, W2, W3). As the suction force is adjusted for each rod-like article specification separately, it allows deceleration of the rod-like articles (1, 2, 3) in the processing compartment (23) of the rotary portions (Wl, W2, W3). One advantageous result of such treatment is that all rod-like articles (1, 2, 3) in the processing compartment (23) may be pushed back to the most rear position available in the compartment (23), eliminating random spacing and ensuring direct contact (13) between the rodlike articles (1, 2, 3) and rear separator (16), and thus reliably and continually defining a relative position of the articles throughout subsequent processing. Since a relative position of the articles (1, 2, 3) may be adjusted against the rear, pushing separator (16), the separator may work as a mechanical timing element allowing to fix and control a position of the rod-like articles (1, 2, 3) in the processing compartment (23), throughout the apparatus (Al). Moreover, suction may be applied for other processing reasons, e.g. in order to remove residual dust and/or loose particles remaining adhered to the rod-like articles (1, 2, 3) after preceding processes, e.g. cutting base rods (not shown) into defined length of the rod-like articles (1, 2, 3) and/or mechanical interaction on the way to and inside the apparatus (1). Another reason for applying suction may be to apply controlled atmosphere to the rod-like articles (1, 2, 3) in the processing compartment (23), e.g. such atmosphere containing menthol vapors and/or other fragrant or sanitizing vapors, and to maintain and/or control vapors saturation in the compartment (23) through removal of excess vapors and/or through cooling articles in the compartment (23).

[0046] Another exemplary practical application of the disclosed arrangement is application of a process exerted through opening or openings (12, 12') transversely to the transfer direction of the rod-like articles (1, 2, 3) and independently of the rotary portions (Wl, W2, W3) to enforce controlled angular movement of the rod-like articles (1, 2, 3) when passing through at least one of the processing zones (e.g. Zl, Z2, Z2A, Z3). Such movement may allow, for example, a light beam to penetrate uniformly the rod material and induce required reactions, e.g. chemical reactions in the rod. Such laser beam may also make unique perforation patterns on each rod-like article independently so that unique perforation patterns can be applied to, and about, rod-like articles (1, 2, 3), a group of rod-like articles, or to a required batch of rod-like articles immediately before fixing their mutual position and sealing the final rod in downstream processing, for example in a garniture assembly. Such perforation patterns can be applied, for example, to modify a pressure drop of the air mixture passing through the filter and, such perforation patterns can further be used for authentication marking of rod-like articles (1, 2, 3), a group of rod-like articles, or to a required batch of rod-like articles.

[0047] In still another exemplary practical application of the disclosed arrangement is application of a process through opening or openings (12, 12') transversely to the transfer direction of the rod-like articles (1, 2, 3) and independently of the rotary portions (Wl, W2, W3) to apply, for example, a sanitizing or fragrance-rich atmosphere through the processing zones (Zl, Z2, Z2A, Z3). For example, flushing the rod-like articles (1, 2, 3) passing through at least one of the processing zones (Zl, Z2, Z2A, Z3) with such atmosphere, or a very accurate application of a required fluid to only selected rod-like articles (1, 2, 3) through a single or a system of, for example, pulse jet nozzles distributed along the processing zones (Zl, Z2, Z2A, Z3). Such a processing mode may further require applying energy, for example, in the form of electromagnetic radiation that may control reaction kinetics aimed at obtaining a desired end effect. Such application or removal of energy may be aimed at, for example, controlling evaporation (drying), liquid solidifying or polymerization processes of earlier applied substances such as, for example, fragrance or taste enhancing liquids.

[0048] Rod-like articles (1, 2, 3) may then be transferred to the subsequent rotary portions (W2, W3). In order to maintain an already fixed alignment of the articles (1, 2, 3) and the position of the articles (1, 2, 3), a continuous and consistent mechanical support may be ensured by direct contact of the rod-like articles (1, 2, 3) with the separators (20) throughout the complete transit towards downstream processing. Typical arrangements of the rotary portions (Wl, W3) or typically, inner rotary portion (W2) only, is revealed for example in Figure 8, where Figure 8a shows an exemplary cross-section through the inner rotary portion (W2), with the peripheral separators (36) having a transverse air gap (37) along the circumference of the rotary portion, the air gap being wide enough to allow separators (15, 16) of the preceding and following rotary portions to get smoothly in-between the divided portions of the separator (36) and provide continuous and consistent support to the rod-like articles (1, 2, 3) in the transition zone, between rotary portion (W2, W3). Figure 8b shows an exemplary side view of rod-like articles transition between rotary portions (Wl, W2), showing schematically interaction between the separators (16, 36). Also, Figure 8 reveals an innovative and advantageous design of the separators (36) with side shields (38) extending from the separators so that at least one, e.g. rear rod-like article (2) in the sequence of pre-aligned articles (1, 2, 3) remains screened from one or both sides, and thus remains protected from all or some of the applied supplementary processing means, e.g. suction, gaseous atmospheres, electromagnetic radiation, etc. Use of such designed separators may allow for processing fragile rod-like articles made of, e.g. non-wrapped cellulose acetate and/or articles containing fragrance, loose particles, etc. Figure 8c shows an alternative exemplary arrangement of the rotary portion (W2) with portions (33, 34) that can be precisely, individually adjusted relative to the rotary portion (W2), and also quickly removed without readjusting the rotary portion (W2) or the whole apparatus (Al).

[0049] Exit of the fully processed rod-like articles, in a prescribed alignment (1, 2, 3), to downstream processing (22) is shown in Figure 9. In the exit area, friction forces between exit sliding guide (39), rod-like articles (1, 2, 3), and the rotary portion (W3), assisted by inertia forces due to rotary movement of the rotary portion (W3), constantly decelerate the articles (1, 2, 3) keeping them supported by the separator (20) that works as a mechanical timing element. In order to support friction and inertia forces in the exit area and ensure required processing result, application of supplementary processing means, e.g. suction, gas vapors, electromagnetic radiation, etc., in a manner discussed earlier in the document, is allowed through the opening (12) extending at the angle (β3). Such processed and aligned segments may then be discharged from the apparatus (Al) onto the continuous ranning paper web (19) driven by the endless belt conveyor (18) that form an initial part of downstream processing (22) where the paper web (19) is folded around the rod-like articles (1, 2, 3) by a folding and sealing assembly, known as a garniture assembly (not shown), producing a continuous, multi-component rod that is subsequently cut at pre-defined intervals when passing through a continuous rod cutting mechanism (not shown) producing discrete articles for treating and altering physical properties of air mixtures passing through such articles. A garniture assembly, continuous rod cutting mechanism, or any individually applied rod comminution mechanisms, as well as other details of downstream processing are not shown or further described here as they are well known in the industry and to persons skilled in the art.

[0050] The exit rotary portion (W3), rotates at angular speed (ω3) adjusted to maintain linear speed (Vw3) at the pitch diameter of the exit rotary portion (W3), the linear speed (Vw3), advantageously overlapping longitudinal axis of the rod-like articles (1, 2, 3) and being synchronized with the linear speed (VB ₂ ) of the paper web (19). Most typical adjustments of linear speeds in the discharge zone sets Vw3 ⁼ B ₂ SO that mutual alignment of the rod-like articles (1, 2, 3) pre-set at the exit from the apparatus (Al) remain preserved when put onto the continuous running paper web (19) and sealed in the garniture. In such case, when Vw ₃ = B ₂ a length of the separator (20), at its pitch diameter, and at the peripheral of the exit rotary portion (W3) defines the air gap (7) between rod segment groups (21) in the adjacent processing compartments (23). Such filter, as shown in Figure 2b, is frequently referred to as a multi- component recess filter rod or a combined recess filter rod. In another case, when V _\ y ₃ > VB ₂ the higher Vw3 allows for pushing the rod segment group (21) being discharged on the continuously running paper web (19), eliminating the air gap (7) and producing multi-component filter rods also known as combiner filter rods. Any deviation from the pre-defined setting options of the linear velocities, especially maintaining Vw3 < VB ₂ may result in disadvantageous irregularities in rod-like articles (1, 2, 3) alignment, mainly due to inertia and friction forces occurring between already unsupported rod-like articles (1, 2, 3) and the paper web (19) moving at a different (higher) speed. This results in random longitudinal displacement of the rod-like articles (1, 2, 3) and adequate deviation of mutual alignment of the rod-like articles (1, 2, 3) discharged from the apparatus (Al, A2, A3) and produces randomly occurring air gaps in-between the rodlike articles (1, 2, 3) put on the continuously running paper web (19). The resulting deviation of mutual alignment of the rod-like articles (1, 2, 3) yields uneven cutting of such composite rodlike article and finally, off-specification and waste product, i.e. production losses.

[0051] The linear speed (Vw ₃ ) and the pace of rotation (co3) of the exit rotary portion (W3) may be precisely controlled through, for example, their servo motors (not shown) and synchronised with the linear speed (V _B2 ) of the paper web (19). Since both number and angular distribution of the separators (20) on the circumference of the rotary portion (W3) may be defined and remain constant for every production specification of the rod-like articles, the exit rotary portion (W3) operates as a rotary encoder precisely converting angular position of the peripheral separators (20) into a reliable control signal to the continuous rod cutting mechanism (not shown) for cutting the continuous rod into a precisely determined discrete articles for treating and altering physical properties of air mixtures.

[0052] Further to the invention, Figure 10 reveals an innovative, adjustable exemplary arrangement of the rotary portions (Wl, W2, W3) with the inner rotary portion (W2, W2', W2") being of variable diameter, allowing the rod-like articles (1, 2, 3) travel time between adjacent portions (Wl, W3) to be advantageously adjustable, according to requirements of supplementary processing by means of, e.g. suction, gas vapors, electromagnetic radiation, etc., applied in the apparatus (Al). This feature allows extending transit and processing time of the rod-like articles (1, 2, 3), proportionally to a selected diameter, and the circumference of the inner rotary portion (W2, W2', W2") and its angular velocity (co) synchronised with adjacent portions (Wl, W3). Depending on the particular filter rod specification being produced, different transit and/or processing times of the rod-like articles (1, 2, 3) may be required. In order to adjust transit and processing time of the rod-like articles (1, 2, 3), diameters of each of the rotary portions (Wl, W2, W3) and therefore longer or shorter circumferences of the rotary portions (Wl, W2, W3) as well as their respective angular speeds (col, ω2, ω3) can be chosen to be different within the apparatus. However, linear speed (V) at the circumference of each of the rotary portions (Wl, W2, W3), where rod-like articles (1, 2, 3) are submitted to subsequent processing means, is maintained substantially the same throughout the apparatus, so that Vwi = Vw2 = V _\ y ₃ . In most cases, only intermediate rotary portion (W2) of another, smaller or bigger, diameter has to be selected, keeping inlet and exit rotary portions (Wl, W3) the same and in the same place and thus minimizing brand change-specific adjustments. When required however, adjusting and fixing rotational shaft and axis of rotation of all the rotary portions (Wl, W2, W3) is allowed in the apparatus. Mechanical assembly for adjusting and fixing rotational shaft and axis of rotation of the rotary portions (Wl, W2, W3) are not shown as the solution is well known in the engineering literature. Consequently, application of supplementary processing means is allowed as final treatment, and adjustment of physical and/or organoleptic properties of all or only selected rod-like articles (1, 2, 3) immediately, i.e. typically, below one (1) second before the final product is formed and sealed in the garniture (not shown), during downstream processing (22).

[0053] Thus, as shown below in Example 1, changing a diameter of, for example, intermediate rotary portion (W2) may therefore allow for adjusting a length of segments travel path to suit processing needs of filter specifications. Example 1 assumes a first diameter of the intermediate rotary portion (W2) as Dl = 250mm, and then changed to D2 = 350mm, with production speed altered at exit from the apparatus in the range V = 100 - 500 m/min. The following data table shows that a change in the diameter of the intermediate rotary portion (W2) only by 40% (from 250mm to 350mm), results in the transit time, used for segments curing or processing purposes increase proportionally, by Δ = 40%, over the whole production speed range.

[0054] Example 1 : Diameter of W2 vs. Transit Time

Exit Speed Wl = 250mm W2 = 350mm Δ =

500 m/min 0.047s 0.066s 41.6%

400 m/min 0.059s 0.082s 39.0%

300 m/min 0.079s 0.110s 39.2%

200 m/min 0.118s 0.165s 39.8% 100 m/min 0.236s 0.330s 39.8%

Average: 40.0%

[0055] Figure 11 reveals an alternative exemplary arrangement of the inner section of the apparatus (Al) having a variable capacity buffer (30), movable (29) between its extreme upper and lower positions defined by the length of the movable frame (26) and thus being able to adjust a length of the transit path, and consequently the transit time of the rod-like articles (1, 2, 3) through the apparatus (Al). The part of the buffer (30) that conveys rod-like articles (1, 2, 3) between the preceding and following rotary portions (Wl, W3) is later in the description referred to as the active part of the buffer (30) while the remaining part of the buffer, not conveying rodlike articles (1, 2, 3) is referred to as the passive part of the buffer (30). The buffer (30) may have a movable frame (26) including a first rotary portion (W2A) and a second rotary portion (W2B) mounted at two ends of the independently driven movable frame (26) and an endless belt (31) circumscribing the first rotary portion (W2A) and the second rotary portion (W2B) and moving between them. The active part of the buffer (30) is circumscribed by extendable sliding guides (not shown), working as sliding guides (35, 39), shown in the attached figures. The endless belt (31) may have a plurality of separators (40) distributed at the outer surface of the belt (31) and shaped for mating with preceding and following portions (Wl, W3) as disclosed in Figure 8. The belt (31) and the separators (40) can be made of plastic, rubber, metal, other suitable materials or a combination of such materials. Additionally, the belt (31) may be tensioned by a set of rollers (27, 28), movable inside the buffer (30) for maintaining adhesion of the rod like articles (1, 2, 3) and the mating parts (Wl, W3, 31) as the capacity of the buffer (30) changes. The rollers (27, 28) may be the same size or may be different sizes. In order to improve reliability of transportation and/or enhance processing efficiency of the rod-like articles (1, 2, 3) passing through the buffer (30), supplementary processing means, e.g. suction, gas vapors, electromagnetic radiation, etc. can be applied throughout only a portion, or the whole extent of the active part of the buffer (30) in a manner that has already been disclosed above, in Figures 7 and 8. Additionally, the belt (31) and the first rotary portion (W2A) can be perforated along the contact area with the rod-like articles (1, 2, 3), which may facilitate application of all or only some of the supplementary processing means. The second rotary portion (W2B) can be similarly perforated along the contact area with the rod-like articles (1, 2, 3), for example, for belt cleaning purposes by means of suction or vacuum (not shown).

[0056] Variable capacity buffer (30) may therefore allow for adjusting a length of the travel path to suit processing needs of filter specifications, as shown in the following Example 2. The data table shows transit time through the variable capacity buffer (30) moving from an initial "0mm" position to 500mm height (i.e. moving up along direction 29), for two linear transfer speeds, VI = 250 m/min and V2 = 500 m/min, resulting in an increase in the transit time through the buffer. The example shows transit time increase by approximately 255%, irrespective of the actual production speed.

[0057] Example 2: Transit Time vs. Buffer Height

[0058] The apparatus (Al), according to the exemplary embodiments disclosed in Figures 3-

11 and described above, differs from the state of the art revealed in known literature as it solves the problem of handling fragile rod-like articles, including non-wrapped cellulose acetate filter segments and also, the problem of ensuring exact mutual alignment of any required combination of rod-like articles consistently, at exit from the apparatus (Al). Additionally, the present invention allows for adjusting transit time through the apparatus while not affecting inlet and exit settings, the adequately adjusted transit time being utilised for further, advantageous processing of the rod-like articles that may include applying supplementary processing means, e.g. suction, gas vapors, electromagnetic radiation, etc., immediately before forming and sealing the final product in the garniture.

[0059] Figure 12 may show a second exemplary embodiment of the apparatus (A2) for buffering and processing multi-segment rod-like articles (1, 2, 3). Reference numerals in Figure

12 are kept the same as previously used to identify similar parts of the apparatus (A2).

[0060] The apparatus (A2) may have inlet rotary portion (Wl) and exit rotary portion (W3) arranged mostly vertically, as shown in Figure 12a. However, inner rotary portion (W2) may be arranged to revolve about a mostly vertical axis of revolution (17). In order to ensure favorable collaboration of the mating rotary portions (Wl, W2, W3), their peripheral shape is corrected as disclosed in Figure 6 and described earlier, so that the rotary portions (Wl, W2, W3) with bevel peripheral surfaces may be used in the apparatus (A2). Feeding and discharge sequence of the rod-like articles (1, 2, 3) to and from the apparatus (A2) is disclosed already in Figures 3 and 4, and the corresponding description of the process with minor modifications to shape of the sliding guides (35, 39) adjusted to follow the modified shape of the rotary portions (Wl, W2, W3). Figure 12b shows a top view of the apparatus (A2) as well as the transfer distance (41) that may fully or only partially comprise the openings (12, 12') that constitute active processing zones (Zl, Z2, Z3) allowing application of supplementary processing means, e.g. suction, gas vapors, electromagnetic radiation, etc. in any required combination and intensity. The openings (12, 12') may extend maximally up to the full length of the travel path (41) along the circumference of the rotary portion (W2).

[0061] In one of the exemplary arrangements of the apparatus (A2), shown in Figure 12c, the inner rotary portion (W2) is positioned at an angle (γ), with γ being in the range from 0 to 90deg and preferably, in the range from 0 to 60deg. Such an arrangement of the apparatus (A2) allows for advantageous transition of the rod-like articles (1, 2, 3) between the rotary portions (Wl, W2, W3) and also advantageous application of selected supplementary processing means. The disclosed arrangement allows application of solid objects, e.g. gelatine capsules containing liquid and/or application of loose particulate material, e.g. charcoal and/or other particles required in manufacturing articles for treating air mixtures passing through. Application of the solid object, as described above, may be carried out through feeding means (42), independently of applying supplementary processing means, e.g. suction, gas vapors, electromagnetic radiation, etc.

[0062] Subsequently, the apparatus (A2) may allow for rearrangement and realignment of the rod-like articles from their initial (1, 2, 3) first in - first out (FIFO) alignment to their final (3, 2, 1) first in - last out (FILO) alignment at exit from the apparatus (A2). One of the preferred methods used for accomplishing precisely repeatable results of rearranging initial alignment of the rod-like articles (1, 2, 3), from FIFO to FILO alignment, is by adjusting a shape of the rotary portions (Wl, W2, W3) and the separators (15, 16, 20), described in the first embodiment of the apparatus (Al), towards straight teeth as in bevel gears (with conical pitch surface and teeth being straight and tapering towards apex), or spiral helical teeth (curved at an angle allowing tooth-segment contact to be gradual and smooth thus, minimizing interfacial rubbing and degradation). Such shaped separators, or teeth, can be meshed in parallel or crossed orientations allowing full flexibility in orientation of the rotary portions (Wl, W2, W3) and respective rotating shafts.

[0063] Figure 13 may show a third exemplary embodiment of the apparatus (A3) for buffering and processing multi-segment rod-like articles (1, 2, 3). Reference numerals in Figure 13 are kept the same as previously used to identify parts of the apparatus (A3).

[0064] The revealed third embodiment of the apparatus (A3) may have rotary portions (Wl, W2, W3) used for buffering and processing multi-segment rod-like articles for treating air mixtures, which may have their axes of rotation perpendicular to each other, as revealed in Figure 13. Revealed arrangement allows substantial extension of the buffering and processing time due to the fact that the inner rotary portion (W2) is adjusted transversely, e.g. perpendicularly, to the main flow direction of the rod-like articles being processed. This allows for fitting the rotary portion (W2) within the apparatus (A3) which allows using minimum space required for the apparatus (A3) in the production area. Other exemplary buffering and processing functions of the apparatus (A3) have already been disclosed above.

[0065] The foregoing description and accompanying figures illustrate the principles, preferred embodiments and modes of operation of the invention. However, the invention should not be construed as being limited to the particular embodiments discussed above. Additional variations of the embodiments discussed above will be appreciated by those skilled in the art.

[0066] Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive. Accordingly, it should be appreciated that variations to those embodiments can be made by those skilled in the art without departing from the scope of the invention as defined by the following claims.