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Title:
IMPROVEMENTS RELATING TO OVERLAYS
Document Type and Number:
WIPO Patent Application WO/2011/075776
Kind Code:
A1
Abstract:
A removable overlay system for a window comprising attachment means to maintain one or more components of the overlay system in position and optionally comprising one or more of clear, tinted (removable or permanent) or sun responsive thermochromic (SRT) overlays.

Inventors:
HUDSON, Andrew (9/17 Malvern Street, Bayswater, Victoria 3153, AU)
CRAIG, Colin (9/17 Malvern Street, Bayswater, Victoria 3153, AU)
Application Number:
AU2010/001720
Publication Date:
June 30, 2011
Filing Date:
December 22, 2010
Export Citation:
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Assignee:
WINDOW ENERGY SOLUTIONS PTY LTD (19/17 Malvern Street, Bayswater, Victoria 3153, AU)
HUDSON, Andrew (9/17 Malvern Street, Bayswater, Victoria 3153, AU)
CRAIG, Colin (9/17 Malvern Street, Bayswater, Victoria 3153, AU)
International Classes:
E06B3/28; E06B9/24; G01F1/00
Foreign References:
US20080092456A12008-04-24
US6446402B12002-09-10
Attorney, Agent or Firm:
THINK IP STRATEGY (32 Sheffield Street, Eltham, Victoria 3095, AU)
Download PDF:
Claims:
Improvements relating to overlays Claims

l. A removable overlay system for a window comprising an attachment to maintain one or niure components of the overlay system in position and optionally comprising one or more of clear, tinted or sun responsive thermuchrumic (SET) overlays.

t>. A removable overlay system according to claim 1 comprising at least one gap between adjacent surfaces to provide enhanced thermal, acoustic and / or other insulation wherein th adjacent surfaces comprise one or more of a window and an overlay, a plurality of overlays or an overlay and another surfac and the gap optionally comprises a vacuum, air, an inert gas (optionally argon) ur the like.

3. A removable overlay system according to claim 2 wherein the gap is adjustable so as to adjust the thermal, acoustic and / or other insulation properties.

4. A removable overlay system according to claim 1 comprising a plurality of overlays and a plurality of attachments so as to enable a user to adjust the type of overlay(s) and any gap(s) between them, a window or another surface depending on seasonal, temperature, light, sound or other requirements.

a- A removable window overlay comprising any one or more of the following characteristics:

a. Total luminous reflection from the glass surface at least nominal when measured with an integrating sphere spectrophotometer as referenced by ASTM E-ye>3 and calculated per ASTM E-30B using Standard CIE Sourc "C" for average daylight. b. Total transmission of solar ultraviolet radiation of air mass - 2 over the spectral range of 3000 to 3800 angstroms in the range 85.0% to yy.y% when measured with an integrating sphere spectrophotometer as referenced by ASTM E-y >3. c. An I transmission of nut more than ir>% and preferably not more than 3% when measured between 900-1000 nanometers.

d. Luminous efficacy at least Nominal.

e. Shading coefficient at least nominal (at 60 Degrees) as measured per ASTM E- 903 and computed in accordance with the established procedures defined by The ASHRAE Handbook of Fundamentals.

f. Total Solar Energy Rejected at least nominal (at 60 Degrees) as measured per ASTM E-903 and computed in accordance with the established procedures defined by The ASHRAE Handbook of Fundamentals.

6. A removable overlay for a system according to claim 1 which optionally comprises a film with an optional thickness of 350 to 700 micron, or a polycarbonate/acrylic sheet with optional thickness in the range 2.5 mm to 12 mm, and optionally one of 3.0mm, 4.5mm, 6,0mm, 7.5mm or 10,00mm, or a sealed lamination of acrylic sheets and SRT interlayer with optional thickness in the range 6,7mm to 21,5mm. Improvements relating to overlays 7. A removable overlay for a system according to claim 1 suitable for use with one or more of a building or a vehicle and optionally on the inside or outside.

8. A removable overlay fur a system according to claim 1 comprising one or more of the following characteristics:

a. The attachment means comprising a magnetic strip, matchpull magnetic strips, steel strapping, channel profiles and/or a shdable guide;

b. An edging {or ofile) which at least partially surrounds the perimeter of the overlay {and preferably substantially so) which comprises ABS which is preferably extruded;

c. A gri to allow ready removal and / or placement of the overlay on a window which is optionally a corner grip and optionally as depicted in Figure 3 herein; d. Any one or more of the features described herein by reference to the Figures. g. An overlay for a window comprising at least one standard film {optionally polyester security film (100-350 micron), laminated to a tint film (optionally Silver 20 or non- metallised dyed ightsky 10) and optionally comprising a layer of standard film laminated to each side of the tint film.

10. A removable overlay for a window comprising a tint such that removal and replacement of the overlay allows f r seasonal adaptation of the level of visible light transmission through the window aperture and optionally wherein the overlay may be applied in conjunction with one or more other overlays which are optionally not tinted.

11. A laminated poly methyl methacrylates cast sheet with a sun responsive thermochromalic interlayer for use with or in an overlay according to the invention.

Description:
Improvements relating tit overlays Rackftround of t he invention;

TrtKJil !onitl gluving systems are expensive Ιυ replace unci Inflexible i>s ihey tire not reinWy removable. There Is it need lor o simple, cost effective system lo enable ndu il i n of windows to changing environmental conditions mid other needs of the lifter.

he reference io any prior m l in this specification is t>oi, and should not b laken us. an acknowledgemenl or any form ol sugges I ion thai Ihe prior art forms pari of i he common gene al knowledge.

Summitry of the invention:

According to a lirsl aspet L of ihe invenlion, there is provided a removable overlay system lor a window comprising an attachment to maintain one or more components ol ' th overlay syslem in position and optionally comprising one or more dear, tinted or sun responsive, thermochromlc (5RT) overlays.

in some embodiments, there is provided a removable overlay syslem comprising ul leasl on gap between adjacent surfaces lu provide enhanced thermal, acoustic and / or other insula 1 ion wherein I he ad.iacenl surfaces comprise one or more ol a window and an overlay, a plurality ol overlays or an overlay and anot her surface and Ihe gap optionally comprises a vacuum, air, an inert gas {optionally argon) or the like. Tn some embodiments, the g p is adjustable so as to adjust the thermal, acoustic and / or other insulation properties.

I n some embodiments, there is provided a removable overlay system comprising a plurality of overlays and a plurality of attachments so as to enable a user to adjust the type of ovcrlay(s) and any garns) between them, a window or another surface, depending on seasonal, tcmpcratui-c, light, sound or other requirements.

Some embodiments provide a removable window overlay comprising any one or more of the following characteristics:

· Total luminous reflection from the glass surface shall be al least nominal when measured wil h · ηη int grating sphere speclrophnlomeler as referenced by AST Ii»yri3 and calculated per ASTM K-3o8 using Standard OIK Sourc "<?' lor average daylight .

• Total li-cinsniission of solar uHruviolel radiation of air mass = 2 over the spect al rungc ol ' 3000 to 3800 angstroms in Ihe range 85.0% lo yy y% when measured with an inlegral ing sphere speclmpholorneler as referenced by ASTM K-y03.

• An IR transmission of nul more than \θ% and preferably not more than 3% when rneasm-ftd be I ween yoo-iOOO nanometers. Improvement* relating to overlays · l ,i»m!iious elH iicy i»l le«)Sl Numinal.

• Shading coefficient al least nominal (at 60 Degrees) as measured per AS M E-y03 and computed in accordance with Ihe established procedures defined by The AJjHRAK H ndbook of Fundamentals.

• Tolul Solar Knergy Rejected shall be al least nominul {al 60 Degrees) aa measured per ASTM and computed in accordance wiLh the established procedures de-fined by

Hie ASH RAK Handbook of Fundamentals.

In som embodiments, there is provided a removable overlay for a system according to the invention which optionally comprises a film with an optional thickness o 350 lo 700 micron, or a polycarbonate/acrylic sheet with optional thickness in the range 2,5 mm to ia mm, and opt ionally one of 3.0mm, 4.5mm, 6.0mm, 7.5mm nr m.oomm, or a sealed lamination of mxyli'- sheets and SR inlerlayer with optional Ihiirknes in the range 6.7mm In 21.5mm.

The invent inn also comprises a remirvAMe overlay for a system acr.ording to Ihe invent ion suitable for use with one nr more n a building ov a vehicle and optionally nn Ihe inside or outside.

In some embodiment ' s, there is provided a removable overlay lor a system according to Ihe invention comprising one or more of the follow! ng c.hai aileristics:

• the aUachmenl means comprising one or more of a magnetic strip, malchpull magnetic strips, steel strapping, channel profiles and/or a slidable guide;

• an edging {or profile) which at least partially surrounds the perimeter of the overlay (and preferably siuisUmliaUy so) which comprises ABS or another suiLable polymer, resin, fibre glass or the like and which is preferably extruded;

• a grip to allow ready removal and / or placement of the overlay on a window which is optionally a comer grip and optionally as depicted in Figur e 2 herein;

• any one or more of the features described herein by reference to any one of the Figures. There is also provided according to the invention, an overlay for a window comprising at least one standard film {optionally polyester security film (100-350 micron), laminated to a tint film (optionally Silver 20 or nun-metallised dyed Nightsky 10) and uptionally comprising u layer of standard film laminated to each side of the tint film,

In some embodiments there- is pruvided a removable, uvcrlay fur a window comprising a tint such that removal and replacement of the overlay allows for seasonal adaptation of the level of visible light transmission through the window aperture and optionally wherein the overlay may be applied in conjunction wilh one or more other overlays which are optionally not tinted. Improvements relating tn overlays In one aspect there is provided a laminated poly methyl methac.ryiates cast sheet with a .sun responsive thcrnmchromatic mtcrlaycr for use with or in an overlay according to the invention.

Tn some embodiments, there is provided a removahle overlay according to the Invention may tor example comprise any one or more of the following characteristics:

· lo il luminous reflect ion I ' rurn the glass surface ai least nominal when measured with an integrat ing sphere. spectrophotometer as referenced |>y AfiTM K-903 and calculated pur ASTM K-308 using Standard I V, Source "C" for average daylight.

• lotal 'r nsmission of solar ul'raviolei radia'ion of air mast) = 2 over !he spec' inl range of 3000 lo 3B00 angstroms in the range 85,0% lo yy.y% when measured with an integrating Sphere Spectrophotometer as referenced hy AS'l' K-y03-

• an I R transmission 0! not more I hart 10% and preferably nol more t an 3% when measured helween yOO-iOOO nannmel rs.

• luminous el ' llracy al least Nominal.

• s ding coefficient al leasl nominal (»| 60 Degrees.) as easu ed per AS'l'M K-y03 and computed in accoixlance with the established procedures deUned by 'I'he

ASI 1 RAK Handbook of Fundamentals.

• Total Solar Knergy Rejected shall be at least nominal (at 60 Degree.) as mea ured per AS'l'M K-y03 and computed in accordance with the established procedures defined by "I'he. AHHRA Handbook of Fundamentals.

in some embodimenl s ii removable overlay according lo the in ent ion may opt ionally comprise a laminated film ( imi)inlJ which optionally has a thickness ol 370 lo 720 micron, or an optically clear polycarbonate or PMMA (Poly Methyl Methacrylate) acryli sheet with optional thickness in the range 2.5 m to ta mm, and optionally one of 3.0mm, 4.5mm, ft.nmm, 7.5mm or m.nomni, or a lamination of two PMMA cast acrylic sheets with an SRT intcriaycr with a total optional thickness in the range of 7.0mm to .1.2mm.

Tn some embodiments, the removable overlay of the invention is suitable for use with one or more of a building ' or a vehicle, and optionally on the Inside or outside.

Tn some embodiments, the removable overlay according to the invention may comprise one or more of the following characteristic.*:

· The attachment means comprising one or more of a magnetic strip or an arrangement of separate rare earth magnets attaching to a matr.bptifl magnetic, strip or a steel strap fixed to the existing window frame or installed sub-frame, or a slidahlc guide; I improvements relati n¾ to overlays · An edgin (or profile) which at least partially surrounds the perimeter of the overlay

{and preferably substantially so) which comprises a suitable material (which may fur example lie ABS or any other UV stahlc plastic or fibrcgJass or suitable construction material which is < iptii rtially extruded tir pi« rtruded);

• Λ grip to allow ready removal and/or placement of the overlay on a window which is optionally a corner giip or remotely stored suction cap grip and optionally as epictcd in Figure it herein;

• Any one or more of the features described herein by reference to the Figures.

Tliroughuut this specification {including any claims which tuHow), unless the context requires otherwise, the word 'comprise', and variations such as 'comprises* and 'comprising', will be understood to imply the inclusion of a sttited integer or step or group of integers or sleps bul noL Ihe exclusion oi any olher integer or slep or group ol ' integers or steps.

Brief description of the drawings:

Figure l is a cross sectional view of a secondary glazing system according tu the present invention.

Figure i» ie a front elevation view «f a secondary glazing eystcm according to the present invention.

Figure \ is an exploded view of a corner section of a secondary glazing system according to the present invention.

Figure 4 depicts front and cross section views of one example embodiment, herein referred to as a Bronze embodiment.

Figure .< ¾ depicts side, isometric and detailed views of a Bronze embodiment.

Figure d depicts an exploited view of a Wnmae embodiment.

Figure.7 depict* front and cross section views of one. example embodiment, herein referred to as a Silver embodiment.

Figure H depicts side, isometric and detailed views of a Silver embodiment.

Figure 9 depicts an exploded view ol a Silver embodiment.

Figure 10 depicts front and cross section views of one example, embodiment, herein referred to us a Gold embodiment. - Figure 11 depicLs side, isometric and detailed views of a Gold embodiment. Improvements relating to overlays Figure 12 depirts front and r.mss section views (if one example embodiment, herein referred to as an Iron embodiment.

Figure 13 de icts side, isometric and detailed views of an Iron embodiment.

Figure.14 deplete an e.v;»loded view of en Iron embodiment.

Figu s 15 and 16 depict various views of an air thermal break αψρίηκ mourning syslem according In ce.riflin eml>odim n|s ol ' lhe invenlion.

Figures 17 and 18 depict various views of u recessed mounting system according lo certain mbodiment of lhe invenlion.

Figures iy and 20 depict various views ol ' a Hash mount raagnel mounting system according |o eer 'in embodiments of ihe invention.

Figures 21 and 2U depict various views of a rebate mount magnet mounting system according Id cerlain embodiments of the invenlion.

Figures 33 and 24 depict various views of a flush mount steel strip mounting system according lo certain embodiments of the invenlion,

Figures S-5 and 6 depict various views of a rebate mount steel strip m unting system according Lo certain embodiments of liie invention,

Figiu'es 27 and 28 depict various views of a flush mount rare earlh magnet moundng system according Lo certain embodiments of the invenlion.

Figures a<j and 30 depict various views of a rebate mount rare earth magnet mounting system according to certain embodiments of the invention.

Detailed description of txjuiiplary embodiments:

It is convenient to describe the mvention herein in relation to particularly preferred embodiments. However, the invention is applicable to a wide range of situations and it i to be appreciated that uthcr constructions and arrangements are also considered as falling within die scope or the invention. Various modifications, alterations, variations and or additions to the construction and arrangements described herein are also considered as falling within the ambit and scope of the present invention.

In some embodiments, the invention provides a secondary glazing system allowing lurhitects/builders/piOpeily owners or vehicle builders or users to achieve a desired level of acoustic and/or thermal insulation by tailoring the number and type of overlay and gap layers il consists of. Improve ents relating to overlays Tn some embodiments, the. invention provides a secondary gla ing system allowing for dark tinting effect on laminated glass windows, in particular large thick and body-tinted panes, which was previously at risk of thermal stress fracturing with the direct application of tint due to the high level of heat hcing absorbed back into the inner layer of glass by dark tints (tor example 2f % VLT or lower).

In some embodiments, the invention provides a secondary glazing system allowing for dark and highly reflective tinting effect on IGU (double glazing) in situations where otherwise the seals would be bluwn due tu excessive pressure resulting from raised temperatures within the air gap caused by the film, applied directly to the internal glass surface, reflecting and absorbing additional heat back into the scaled air gup.

In some embodiments, the invention provides a system which can also be used to better seal and restrict the entry of dust and general movement of air currents through air conditioning or heating vents, particularly in ceilings, or poorly sealed doors and windows.

In some preferred embodiments, there is provided a window film that i been laminated with a window tint film. Preferred examples of this cctnpi se two layers of standard film (such as security film) and preferably on either side of th Lint lilm. Some embodiments comprise two layers ol polyester security film { 100-350 micron each) on either sid of a conventional window lint lilm. Particularly preferred examples comprise metallised Silver 20 ( H l ίν«) and/or non-mnlalllwid dyed Nighlsky 10 {non-rellerHve).

In some preferred embodiments, there is provided a removal and replaceable lint layer lor a window overlay which Is preferably ol high slrehgj h and rigjdily. Such embodi enls allow nsf.rs lo seasonally adapt Ihe level of visible, lighl t ransmission Ihroiigh Ihe. secondary lav.ing by r.hnnging the ovRrlays as required (for x m le by removing a ti nt overlay riimpone.nt). As an example., sn<:l embodiments provide, a greater energy-saving benefit in Winter when otherwise with permanently tinted windows greater amounts of energy would e consumed hy lighting.

Some, embodime ts provide laminated P MA cast acrylic sheets with a Sim Responsive. Thcm ichromatic (SRT) intcrl&ycr. Such sheets arc preferably edge welded to provide a substantially oxygen impermeable seal.

Figure 1 depicts an existing window or section of door glass (1 ) with insulating material, such as heading or silicon (K) and overlay iu) which comprises polycarbonate sheet with a body tint or a tint film applied. The overlay may comprise any suitable material, for example a security film, such as a heavy duty film, tor example of thickness in the range nn to onn micron, preferably 50 to 700 micron. I improvements relati ng to overlays Overlay {2) is attached tn -windo frame (3) via sub frame (f>) which in this embodiment comprises extruded plastic and is held to frame {3) by screw (7). Magnetic strips (5) serve to attach overlay (2), via edging .{or profile) (4) to sub frame (ft). Edging or profile {4) may partially surround overlay (2) provided that this is sufficient to enable engagement with window frame (',() in such a way to hold overlay (a) in place. In some preferred embodiments, overlay (it) is substantially surrounded at the perimeter by profile (4) which provides added strength.

An overlay according to the present invention may be applied to cither the inside or the outside of a window. Attachment means suitable to an outside attachment may be used in such embodiments. In some of these, a simple magnetic snip system as described above will b sufficient. In others, an alternative system, such as a set of guides and/or channels with which the overlay slidably engages may be required (lor example lo avoid the overlay being blown away by wind).

Figure a depicts overlay (y) with corner pieces (1.0) in ihis embodimenL comprising plastic / ABS and piolile (12} completely surrounding ihe perimeter of overlay (y). Also depicted is ling K< ip 1 1 which is in this embodiment placed in a comer and enables ready application and removal of overlay (y).

In some embodiments ihere is no linge κπρ. In these embodiments, another suitable means ol removal may be used. ".Tii.i may ίοι· example comprise an external device, such as a su ti n MI p.

Figu e 3 depicJS an exploded view ol one corner ol un overlay s stem uccoixling lo Ihe present invent ion. Overlay ( 14) is allac.hed lo magnetic si rip (13) via exl mded profile ( if) and corner piece { 15) is attar.hed aronnd profile { in).

A wide viiHely of optional, left hi res may be comprised in nn overlay according lo Ihe invention, Cor example:

* Optical Grade polycarbonate o cast I'ivlMA {I'erspex or any other brand) - of var ing thicknesses, lo example 3.0mm, 4.5mm, 6-Omm, 7.5mm or lo.oomm utilised as individual sheets or edge-welded and Inminaled together with an SRT inlerlayer

• Trim in a wide variety of colours to match existing frame colours.

• Trim made out of extruded ABS or any other UV-stahlc plastic, fihrcgloss compound or any other sui ta lc construction material.

• Corner trim on overlays made from ABS or any other UV-stablc plastic, libreglass ci >mp< >und t ir any 1 ithcr suitable & >nstracti< HI material.

• Corner finger grip made from ABS or any other UV-stable plastic, libreglass compound or airy other suitable construction material or separate suction cap grip. Improvements relating to overlays · Magnetic strip or individual rare earth magnets affixed to rear side of secondary glazing.

• Matchpull magnetic strip or thin, powder coated steel strapping and/or steel suhframc affixed to existing window frame or directly onto window gbss.

• Λ self managed system allowing removal of tint layer in winter or an automatically adapting SRT system requiring no electric current and providing additiun VLT

(Visible Light Transmission] in Winter.

Any suitable specifications may be used in relation to the tint of an overlay according to the present invention. Tinting has many beneficial effects, for example, fade protection fur furniture, drapes, carpets and flooring In addition it results in glare, UV and further excessive heat gain reduction. Λ useful benefit is the lowering of overall energy costs, particularly in relation lo air conditioning and healing.

Suitable Visible Light Transmission levels may for example range from approx 8% at darkest when exposed Lo .maximum climatic heal (Summer) lo upprox 55% in minimum climatic lieal conditions (Winter). The amount of solar heal rejected may ample range from appvox 65% al ils lowesl VI lo 40¾ al ils hi^hesl Vl .T lcvel.

Thermal I s lfltiw

In some embodiments, there are a range of possible methods of installing an overlay ccording lo Lhe invention, In such embodiments, it is ollen beneficial lo consider Lhe optimum tilr s p widths for various requirements, such as thermal insulation (summer heal guin / winlcr heiii lossj o ocoi>slic insula I io (reduction in level of i co i g noise).

for example, In some embodiments, lor thermal insulation, lhe optimum air gap width is in the range o' 8 25 mm lo minimise air movement wilhin n air pocket between the existing gl ss and lhe irislalled overlay. Any movehienl of air increases lhe rule of heal loss/gain a -.ross the. air gap as a greater surface of the air is exjv>sef1 lo lhe inner and culler harrier surfaces ot the air ga|i.

Ah lher consideration in lhe delermi.ning insnlalioh is lhe effec-Jiveness o' lhe seal around the existing gla7.ing. ll ' ncil cnrrenlly well sealed, 1 his will result in heal leakage.

The cunslrucfion material for lhe exisling windows will also play » minor role in thermal insulation. Thus Tor example, aluminium window frames are better heat conductors than tim her window frames and therefore less effective at insulating against eat gain and loss.

Kxample Performanc Dala Improvements relating to overlays

Acoustic Insulation

For acoustic insulation, the optimum air gap width is as wide as possible. In general, this means not less than 50mm and preferably mure than lOOniux. The wider the gap and the thicker the material of which the barriers arc constructed, the greater level of sound insulation can be achieved.

Example Performance Data

Nuisc reduction may be as great as 6n% or more dependent on the width of the air gap and the thickness of the uvcrlay (for example, , 4.5 or 6mm).

Figure 4 depict front and cross section views of one example embodiment, herein referred to as a Bronze embodiment. Figure 5 depicts side, isometric and detailed views of a Bronze, embodiment and Figure 0 depicts an exploded view uf a Bronze cmbudinicnt. The Bronze embodiment comprises a basic single layer overlay. It. can be in any suiLable form, in this example it is either in clear polycarbonate or Lamitint (showing three laminations with the Iwo external layers of 350 micron polyester security film encapsulating the third conventional window lint Mm),

Figure 7 deplete front and cross section views of one example embodiment, al lime herein referred lo as a Silver embodiment, Figure 8 depicts side, isometric and detailed views of a Silver emboilimenl and Figure y depicts an exploded view of n Silver embodiment. The Silver embodiment comprises rt sl ftndnrd single polycrtrbonnle/ncryli ove lay bill with added removable/replaceable T^mlttnt overlay. (Tjmntmt refers to a laminate with tinted and win-tinted materials. )

Figure 10 d icts front and cross section views of one exampl embodiment, at time herein referred to as a Clold embodiment. Figure n depicts side, isometric and detailed view* of n (fold embodiment. Improvements relating tn overlays Tn this example embodiment, the Oold embodiment comprises premium tailored mnltiple. layers system. Tn this example, it comprises -> layers of polycarbonate or acrylic sheet with a scaled air gap (vacuum, air or argon-filled). The third layer is Lamitint whicli slides into a slot in the surrounding edge frame and can t»c easily removed and replaced. Can he manufactured with multiple layers and air gaps, with polycarbonate/acrylic of any thickness and include Lamitint and SRT layers to meet the prescribed acoustic and/or thermal insulation requirements.

Figure 12 depicts front and cross section views of one example embodiment, at time herein referred to as an Iron embodiment. Figure 1 depicts side, isometric and detailed views and Figure 14 depicts an exploded view of an Iron embodiment. The Iron embodiment illustrates yet another example implementation of the approach and flexibility of the invention.

Figures 15 to 0 illustrate various example embodiments showing approaches to mounting systems. Note, that preferably thermal break capping is only for use with existing aluminium or metal frames.

Recessed moimtings require installation of a new sub-frame (constructed for example of either right angle steel or rectangular acrylic rod with sLeel strapping attached Lo allow for magnetic adhesion), Another alternative construction uses an existing suitable vebule in |he window frame and applies a second snip magnet or steel strapping in this rebate io facilitate later al lachmenl of I he overlay syslem.

In some embodiments there is provided a Flush Front Mount which is engage directly on the front luce ol the existing frame ulilising a mulchpuU magnet of magnel to steel strapping allachmenl system.

U should be noted thai rare earth magnets may be used instead ol strip magnels, 11 ' rare, eni lh mngnels. ore lo be utilised, an Snlei medinle compressible loam strip is also preferably installed to ensure a |>eller seal ol ' lhe system.

Kxantple i; Overlay coaled wiih liniwl film

Film Material: According to this embodiment, the iTIm shall be an opu ' cally clear polyester film containing a plurality ol " layers and incorporatin an acrylic pressure sensitive adhesive on one side an an acrylic abrasion resisli l coaling on Ihe other. The film shall also incorporate Tnfrared nhsorhing carbon and/or metal oxide particles. The film shall he uniform without noticeable pin holes, streaks, thin spots, s ratc es, banding or ot er optical defects. The variation in total transmission across the width, at any portion along the length, shall not exceed 2% over the average. The film shall have a nominal thickness of .n mils (n.nna inches ' ). Improvements- relating to overlays Emissivity: The. eiuiftsivity of the non-adhesive, surface of the film shall he 0.78. nominal wlicn measured using a Devices & Services Emissomctc Model AE at or near room temperature.

U Value: The U Value of the film applied to l/V (fimni ) dear glass shall he. l.o nominal when measured in accordance with test procedures described for Emissivity.

Transmission - Visible: Whe applied to {6mm ) clear glass, tlic luminous transmittancc shall be nominal when measured with an integrating sphere spectrophotometer as referenced by AST E-qo. and calculated per ASTM E-:in8 using Standard Source "C" for average daylight.

Reflection - Visible, Exterior: When applied to 1/4" (fimm) clear glass, the total luminous reflection from the glass surface shall l c nominal when measured with an integrating sphere spectrophotometer as referenced by ASTM E-on;i and calculated per ASTM Ε- Π8 using Standard CIE Source "C" tor average daylight.

Reflection - Visible, Interior: When applied to 1/4" ff ' imml clear glass, tlic total luminous reflection from the glass surface shall be nominal when measured with an integrating sphere spectrophotometer as referenced by ASTM E-003 and calculated per ASTM E-noS using Standard CIE Source "C for average daylight.

Rejected - Ultraviulct Light: Wlicn applied to 1/4" 6mn.) clear glass, tlic tutal transmission of solar ultraviolet radiation of a - mass = a over the spectral range of 3000 to 3800 angstroms shall be 99· 9% minimum when measured with tin integrating sphere spectrophotometer as referenced by ASTM £-903, °

Rejected - Infrared Light: Film shall have an II transmission uf not more than 3% when measured between 9OQ-1000 nanometers.

Luminous Efficacy: When applied to Vi" (6nim) clear glass, tlic luminous efficacy Dcimed as the ratio of visible light transmission to shading coefficient) shall be Nominal.

Shading Coefficient: When applied to 1/4" (6nim) clear glass, d e. shading coefficient shall be nominal (at 60 Degrees) as measured per ASTM E-003 and computed in accordance with the established procedures delined by The ASHRAE Handbook of fundamentals!

Total Solar Energy Rejected - normal and 60 Degree Angle: When applied to 1/4" (6mm) dear g 5 lass, the TSER shall be nominal (at 60 Degrees) as measured per ASTM E-903 and computed in accordance with the established procedures defined by The ASHRAE Handbook of undatnenlals. Improvements relating to overlays Example 2: Overlay coated with tinted night vision film

Sr.n| ) « (Nl^hl Vision ) NV-15 NV-25 NV-35 NV-45

Thickness

(mils) 2.5 2.5 2.52.5

(inches) 0.00200.0020 0.0020 0.0020

Eniissivity 0.70 0.7a 0.74 0.78

U Value 1.04 i.or > 1.06 1.06

Visible Light Tiansniissii «1 15% ^% 4f ¾'»

Visible Reflection

Interior iy% vi% ia' H%

Kxlerior 43% 2 % i % y %

Ultraviolet Transmission < \% < \% <i% <\%

Shading Coefficient O.' J 0.31J 0.40 0.63

Ailbesive System: Pressure sensitive, wealherable, ticrylale adhesive applied unifonnly over suri ' uee opposite abrusion resistant coated surface.

Viewing film from a distance of io feet (3 m) at angles up to 45 degrees from either side of glass, Hlra shall not appear distorted.

Abrasion Resistance: Surface coating resistant to abrasion, with less than 5 percent increase of transmitted light haze resulting per ASTM D.1044 using ioo cycles, 500 grams of weight, and CSioV Cnlbiase Wheel.

Product Data: Manufacturer's product data including installation instructions and cleaning methods.

Film Material: Film material consists of an optically clear metallized polyester film which may b laminated to a dear polyester film. Provid films with acrylic abrasion-resistant coaling over surface of film lor enhanced durability,

Film Color: Derived from metal coating and/or components, and product will not contain conventional dyed polyester.

Provide uniform film, without noticeable pin holes, streaks, thin spots, scratches, banding, or other optical defects. Variation in total transmission across width, at any portion along I mprovenients relating tn overlays length, shall not exceed 2 percent over average. Density of film across web is not to exceed plus or minus 2 percent. Provide film with no evidence of coating voids.

Example 3: Overlay coated with architectural tinted film

Ulliaviolcl Rejected (ASTM K y03): Nol less Iban yy percent (.

Visible f .iftbl Transmission (ASTM y03, AST K308): Nol more l an 75 perce.nl.

Visible light Rejected (AS™ E 903): Not less thau lit percent.

Solar Heat Reduction: Not less than 10 percent.

Shading Coefficient at η Degrees (Normal Incidence ' ) ΓΛ5ΤΜ E gr>3): Not less than 0.86. REFERENCES ASTIRAE - American Society for Heating, Refrigeration, and Air Conditioning Engineers; Handbook of Fundamentals, lyyy Edition.

ASTM K 84 - standard Method ol ' Tesl for Sui f ' acp. liiirning Chm aclfti-islics of Ruilding Materials.

ASTM K 308 - Standard Recommended Praclice lor Speclopholomclry and Desci iplion of Color in CI 1931 System.

ASTM E i)03 - Standard Methods oi Test for Solar Abs orbancc, Reflectance and

Transrnittancc of Materials Using Integrating Spheres.

ASTM O aft - Standard Practice for Performing Accelerated Outdoor Wcathcrizing tor Non-inptalH Materials Using Concentrated Natural Sunlight.




 
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