INNOVUUM S.R.L. (Via Cavallotti 12, Gallarate, 21013, IT)
1. A rolling pin constituted by a tubular body (11) made of an aluminum sheet curved around a longitudinal axis and electro-welded along a pair of longitudinal edges brought into contact by bending.
2. Rolling pin according to claim 1, characterized by comprising an electro-welded line (13) along the aforementioned longitudinal edges, visible along the lateral surface of the tubular body (11) .
3 . Rolling pin which according to claim 1 or claim 2, characterized in that the ends (14) of the tubular body (11) are rounded or chamfered.
4. Rolling pin which according to claims 1-3, characterized in that the tubular body (11) is provided with a helical groove .
5. Rolling pin according to claim 4, characterized in that the helical groove starts from the center of the rolling pin and develops clockwise (20) or counterclockwise (21) towards the right and left ends of the tubular body.
6. Rolling pin according to claim 4 or claim 5, characterized in that the helical groove starts from the center of the rolling pin towards at least one of the two ends, developing clockwise (20) or counterclockwise (21) .
7 . Rolling pin according to any claim 4-6, characterized in that the helical groove is provided with different pitches .
8. Rolling pin according to any of preceding claim 1-7, characterized in that the tubular body (11) is provided, in the vicinity of at least one of its ends, with one or more holes (16) for the insertion of hanging hooks.
9 . Rolling pin according to any of preceding claims 1-8, characterized by a pair of two opposing holes (16) corresponding to at least one of its ends.
10. Rolling pin according to any of preceding claims 1-9, characterized in that the tubular body (11) is provided, on its ends, with grip handles (17) .
11. Rolling pin according to any of preceding claims 1-10, characterized in that the tubular body (11) is closed at its ends by caps (15, 18) .
12. Rolling pin according to claim 11, characterized in that the two caps (15, 18) are inserted in the tubular body (11) to be watertight.
13. Rolling pin according to claim 11 or 12, characterized in that the grip handles (17) are integral with the end caps ( 15) .
14. Rolling pin according to any of preceding claims 1-13, characterized in that the thickness of the wall of the tubular body (11) is between 0.5 and 0.8 millimeters, preferably between 0.5 and 0.7 millimeters.
15. Rolling pin according to any of preceding claims 1-14, characterized in that the diameter of the tubular body (11) is between 35 and 70 millimeters, preferably between 38 and 58 millimeters.
16. Rolling pin according to any of preceding claims 1-15, characterized in that the tubular body (11) is made of aluminum and serves as a receptacle of hot substances or liquids, for the purpose of altering the surface temperature of the rolling pin itself.
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Field of the Invention
The invention described herein refers to a rolling pin, which is a food preparation utensil used to flatten and shape dough, such as bread, pasta or other dough.
Background of the Invention
As it is known, rolling pins essentially comprise a cylindrical body made of wood, plastic, metal, marble or other suitable material, possibly featuring two handles at its end tips to be more easily handled by the user during dough rolling.
Rolling pins generally have a diameter between 5 and 8 centimeters, and a length of up to 50 - 70 centimeters. Desirable rolling pins are those with a sufficiently non ¬ stick surface, so as to prevent dough residues to stick to the pin itself, thus causing breakage of the dough, especially when it is particularly thin.
Marble is a material with good non-stick features; however, a marble rolling pin can be particularly heavy and, consequently, can only be of very small lengths.
Another material with good non-stick features is aluminum, which is also light, and, therefore can be handled with ease. At present, it is possible to manufacture very
light, easily washable rolling pins consisting of an aluminum tubular body, obtained by extrusion, having a length greater than 50 - 60 cm. However, aluminumis
relatively expensive and, therefore, as a cost control measure its thickness should be limited as much as possible. Current aluminum wire drawing technology does not permit to obtain tubular bodies with the thickness required to control costs for the manufacture of rolling pins.
Furthermore, regardless of the material, length and diameter of the rolling pin, simple and uniform flattening and widening of flour-based and other dough for food preparation can be challenging. Such difficulties are the result of the elastic property of the dough, which produces a more or less noticeable contraction effect, or elastic return, at the end of each single rolling operation.
Moreover, the rolling pin is the reference utensil to flatten dough, though not for cutting of elongated dough, (for example, spaghetti, tagliatelle, etc), at the end of processing; for this reason, other utensils are used, which, in certain cases, are operated alongside the rolling pin after the dough has been completely flattened.
Summary of the Invention
The general purpose of this invention is to remedy all drawbacks discussed above by making available an aluminum rolling pin which can be manufactured in a particularly economical fashion and that can, if necessary, facilitate dough flattening and cutting.
In light of this purpose, a rolling pin was designed and manufactured constituted by a tubular body made of an aluminum flat sheet which is curved around a longitudinal axis and welded along a pair of longitudinal edges brought into contact by bending.
To facilitate dough flattening and cutting, moreover, a groove is added to the rolling pin' s surface for the purpose of guiding the flattening operation from the center, which is to say, from the center of the rolling pin outwardly, thus stretching the dough longitudinally and transversely, and facilitating the entire operation.
Brief Description of the Drawings
In order to clarify the explanation of the innovative principles of this invention, as well as the advantages it offers in relation to standard products, we will rely upon the attached drawings to present a prototype comprising our principles. The illustrations refer to the following:
- Figure 1 bears a perspective view of the rolling pin we propose in our invention;
- Figure 2 bears a perspective view of the rolling pin we propose in Figure 1 but refers to a possible modified rolling pin;
- Figure 3 represents an elevated view of one of the rolling pin's end tips;
- Figure 4 bears a variant rolling pin model whose surface features grooves for the purpose of making easier flattening or cutting of an elongate dough;
- Figure 5 shows the helical shape of the grooves on the rolling pin surface which, from the center radiate across opposing trends: a helical groove, in a counterclockwise direction from the center to the outer left; the other helical groove, in a clockwise direction from the center to the outer right.
Detailed Description of the Invention
With reference to the figures, a rolling pin 10 is constituted by a tubular body 11 made of aluminum with a longitudinal rotation axis 12.
The tubular body 11 is obtained from a flat rectangular aluminum sheet, which is curved around an axis parallel to its longitudinal edges (which will serve as the rolling pin's rotation axis 12), until the point at which the longitudinal edges come into contact with one another and are subsequently joined by electro-welding.
Figure 1 shows dotted line 13, which is the point of welding of the two edges of the flat aluminum sheet.
In practical terms, a rolling pin produced according to this invention, from a flat aluminum sheet, bent into a cylindrical form and welded along its longitudinal edges brought into reciprocal contact is distinguishable from a similar tool made in a traditional way by use of an extruded aluminum pipe, because the electro-welded line 13 of the two longitudinal edges of the original sheet is easily visible along the lateral surface of the cylindrical body 11.
Preferably, the aluminum used is submitted to a "flash anodized" process (to which pigments are added to obtain a variety of different colors), which is suitable for food- contact applications.
By making the rolling pin' s main body with an aluminum sheet, it is possible to maintain the tube's walls sufficiently thin (between 0.5 and 2 millimeters, preferably between 0.5 and 0.7 millimeters for a rolling pin with a smooth surface, and between 1 and 1.2 mm for a rolling pin with helical grooves) to allow minimizing the amount of materials needed, while also preserving the tool's strength and, therefore, its overall weight and cost. With this patent, it is possible to produce utensils of considerable length (between 50 and 120 centimeters), easily maneuverable, of particular usefulness for artisanal or semi-industrial applications where the amount of dough processed is greater than amounts generally used in domestic settings.
Typically, the diameter of the tubular body 11 may be between 35 mm and 70 mm, preferably between 38 and 58 millimeters, depending upon the scope of application.
Advantageously, the edges of the tubular body' s extremities of the rolling pin are finished to obtain a rounding or curved effect (for example, a chamfer 14 as shown in Figure 3), in order to reduce the risk of accidental injuries that might occur if the edges of the original raw sheet were present, which would be sharp and irregular .
The tubular body may be kept open at the extremities, as shown in Figure 1, or it can be closed by suitable caps 15 (made of plastic) , or with caps 18 (made of silicone) , or even with stoppers of shapes and materials that are different among them and that may be suitable for food- contact applications.
These caps are advantageously placed in a watertight fashion inside the aluminum cylindrical body, and they can be removed at any time. This way, it is possible to prevent dough fragments from penetrating inside during processing; furthermore, it is also possible to prevent water from seeping inside the rolling pin' s body during washing and cleaning operations. At the same time, it is also possible to insert hot or cold materials - where appropriate inside the rolling pin which, thanks to the high thermoconductive properties of aluminum can release heat to the rolling pin' s body, thus further facilitating the processing of hard or soft dough.
If the user does not wish to equip the rolling pin with closing caps at its extremities, the tubular body 11 can be advantageously equipped, in the vicinity of at least one of said extremities, with one or more holes 16 that be used to hand the utensil when not in use.
Figure 1 is shown with a pair of opposing holes 16 which can be used, for example, for the insertion of a gripper hook, such as the type equipped with two ends that are elastically pushed away from one another.
Alternatively, the rolling pin could be hung by a classic hanger hook. In this case, only one hole 16 may be sufficient .
Finally, to facilitate the flattening of dough e its cutting by pressure exerted on the utensil by both hands, it is possible to produce a helical groove (figure 5) along the outer surface of the rolling pin which, starting from the center (center line) of the tubular body 18, may have a pitch 19 clockwise orientation 20 (or counterclockwise 21) along the longitudinal axis toward the right (or left) end of the body itself.
Similarly, it is possible to make a helical groove which, always starting from the center of the tubular body, will have a pitch 22 (equal or different in length from pitch 19) with clockwise orientation 20 (or counterclockwise 21) along the longitudinal axis towards the left tip of the body itself. The body of the rolling pin may thus present a single groove from the center towards one of the two extremities, or along the entire body, starting from the center towards both ends with a consistent or different pitch along the groove.
Pitches 19 and 22 of this helical groove are between 1 and 20 mm, and preferably between 8 and 10 millimeters. The surface 23 of the rolling pin between two pitches, which defines the track of the helix, and which comes into contact with the dough, has a width comprised between 0.5 and 5 millimeters, and preferably from 2.5 to 3 millimeters .
The entire helical groove can be obtained by removal of material or material deposit.
Figure 4 shows the three-dimensional groove which highlights the primary pitch 19 obtained by removal of material from the aluminum surface of the rolling pin, or as a result of the deposit of material useful to create the track of helix 23 which modifies the surface that comes into contact with the dough, thus giving the utensil the ability to cut the dough by exercising greater pressure on it. From this action, it is possible to obtain, by way of example, some helical or otherwise irregular tagliatelle.
At this point, it is clear how a rolling pin produced in accordance to this patent, by the use of an aluminum sheet curved into a cylindrical shape then electro-welded along its longitudinal edges put in contact with one another, allow the production of a utensil that is lighter, handier and more economical compared to a traditional rolling pin produced from an extruded aluminum tube.
It is also clear that the grooves on the surface, permit to flatten the dough during processing while simultaneously stretching it, thus decreasing the processing time and ensuring greater uniformity in the thickness of the dough, which, in and of itself, cannot be obtained by use of a traditional rolling pin unless the user has advanced skills and is willing to invest longer preparation time.
The aforementioned grooves can, furthermore, be functional once the tool is submitted to adequate pressure by the user, in order to cut the dough, a result that cannot be obtained with other rolling pins except through the insertion in the central body of appropriate working tools .
Moreover, the surface's thermal properties of the utensil, yielded by the aluminum alloy with which it was created, in conjunction with the end caps, allow filling of the body with hot or cold materials or liquids which permit rapid heating or cooling of the rolling pin's body. In particular, when it comes to heating the surface, it cannot be achievable by use of a full (not hollow) rolling pin produced with materials not suitable for heat transmission and devoid of end caps that permit the insertion of a hot substance inside of utensil.
Naturally, the above description of the possible application of the innovative principles contained herein is only provided by way of example, and, should not therefore be taken to be interpreted within limiting lenses .
For example, the rolling pin could advantageously be provided with gripping handles on the two ends to be more easily held by the user during dough processing.
Figure 3 is shown with the dotted line, and a handle 17 attached to one of the two extremities of the tubular body 11. In particular, the handles 17 can be integrated to any closing caps 15, if applicable.
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