United States Patent
`Anderson
`
`p15
`
`[11]
`[45]
`
`4,307,768
`Dec, 29, 1981
`
`[54]
`
`[75]
`
`[73]
`
`[21]
`
`[22]
`
`ENERGY CONSERVING INSULATIVE
`WINDOW SHADE
`
`Inventor:
`
`John J. Anderson, Ramsey, N.J.
`
`Assignee: Anmar Industries, Inc., Hackensack,
`N.J.
`Appl. No: 215,710
`Filed:
`Dec.12, 1980
`
`5/1969 Luboshez .......ceseeseseeneaee 160/84 R
`- 3,443,860
`9/1969 Sulkes 0...
`seccssssecssnserssnsees 160/84 R
`3,465,806
`
`» 24/1273
`4/1973 Pickney...
`3,725,981
`
`vs 428/117
`6/1975. Kromrey.........
`3,887,739
`....ccescessesseeeees 428/116
`8/1975 Frost et al.
`3,899,326
`FOREIGN PATENT DOCUMENTS
`
`6508988
`1/1967 Netherlands... 160/84 R
`
`11493 of 1906 United Kingdom.....
`756270 9/1956 United Kingdom ............. 160/84 R
`
`[63]
`
`[51]
`[52]
`
`[58]
`
`[56]
`
`Related U.S. Application Data
`Continuation-in-part of Ser. No. 879,356, Feb. 21, 1978.
`Ent, C13 osccccscscsccsesesssscsssscsssssscccseceecees A47H 5/00
`US. Cle ceesssscsssscsccssesssesessssenee 160/84 R; 428/116;
`160/5
`Field of Search vcs 160/84 R, 168, 172,
`160/238, 266, 269, 271, 273, 5; 24/122.3, 122.6,
`129 D, 143 R, 143 A; 428/73, 116, 117, 118
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`Primary Examiner—Philip C. Kannan
`[57]
`ABSTRACT
`Windowshadestructure for reducing heat loss or heat
`gain through a window or other “thermal opening”
`wherein the shade body is drawable over the window
`and is collapsible into a reduced storage volume. The
`shade body comprises opposed walls of thin, sheet-like
`layers of flexible and resilient material joined together
`along spaced parallel adhesion lines to form a plurality
`of contiguous and parallel channels in the shade body.
`A strip-like sealing slat on the surfaces of the window
`frame which oppose the edge portions of the shade
`1/1934 Thomson ..........seccseseeeeeeee 428/117
`1,942,989
`body,anda slot-like recess formed in the opposite edges
`8/1939 Simon....
`.
`2,170,877
`8/1949 Bacon .....ccccsscscsssesceseeeeees 428/116
`2,477,852
`of the shade body and extending the full length thereof
`4/1951 Morse........
`. 160/269 X
`2,548,041
`receive the edge portions and portions of the lateral
`5/1951 Guarcello ..
`2,551,736
`surfaces of the sealing slat, with the free edges of the
`om
`1/1959 Kacowski..
`2,869,205
`sheet-like layers being flexed against the lateral surfaces
`3,225,509 12/1965 May .....cscsccsssrcscersesesseneeeeees 428/118
`of the sealing slat to insure against convective air flow
`3,231,006
`1/1966 Fisheretal.
`. 160/269 X
`and provide an effective convective seal.
`3,256,931
`6/1966 Oijerholm ..
`160/84 R X
`
`3,294,151 12/1966 Hartley et ab.oo...seseseeeee 160/5
`3,294,152 12/1966 Kuitvenhover
`..........cccccee 160/5
`22 Claims, 32 Drawing Figures
`
`
`
`
`
`
`
`
`Petitioner Chanel, Inc. Exhibit 1023
`Page 1
`
`Petitioner Chanel, Inc. Exhibit 1023
`Page 1
`
`

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`Dec. 29, 1981
`
`Sheet 1 of 9
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`Petitioner Chanel, Inc. Exhibit 1023
`Page 2
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`Petitioner Chanel, Inc. Exhibit 1023
`Page 2
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`

`

`U.S. Patent
`
`Dec. 29, 1981
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`Sheet 2 of 9
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`Petitioner Chanel, Inc. Exhibit 1023
`Page 3
`
`Petitioner Chanel, Inc. Exhibit 1023
`Page 3
`
`

`

`U.S. Patent
`
`Dec.29, 1981
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`Petitioner Chanel, Int! Exhibit 1023
`Page 4
`
`Petitioner Chanel, Inc. Exhibit 1023
`Page 4
`
`

`

`U.S. Patent
`
`Dec. 29, 1981
`
`Sheet 4 of 9
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`4,307,768
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`Petitioner Chanel, Inc. Exhibit 1023
`Page 5
`
`Petitioner Chanel, Inc. Exhibit 1023
`Page 5
`
`

`

`U.S. Patent
`
`Dec. 29, 1981
`
`Sheet 5 of 9
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`4,307,768
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`
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`Petitioner Chanel, Inc. Exhibit 1023
`Page 6
`
`

`

`Sheet 6 of 9
`
`4,307,768
`
`U.S. Patent
`
`Dec. 29, 1981
`
`FIG. i4e
`
`CHANNEL COUNT
`
`Petitioner Chanel, Inc. Exhibit 1023
`Page 7
`
`Petitioner Chanel, Inc. Exhibit 1023
`Page 7
`
`

`

`U.S. Patent
`
`Dec. 29, 1981
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`Petitioner Chanel, Inc. Exhibit 1023
`Page 8
`
`Petitioner Chanel, Inc. Exhibit 1023
`Page 8
`
`
`
`
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`
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`

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`U.S. Patent
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`Dec. 29, 1981
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`Sheet 8 of 9
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`4,307,768
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`Page 9
`
`Petitioner Chanel, Inc. Exhibit 1023
`Page 9
`
`

`

`U.S. Patent
`
`Dec.29, 1981
`
`Sheet 9 of 9
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`4,307,768
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`Petitioner Chanel, Inc. Exhibit 1023
`Page 10
`
`Petitioner Chanel, Inc. Exhibit 1023
`Page 10
`
`

`

`ENERGY CONSERVING INSULATIVE WINDOW
`SHADE
`
`CROSS-REFERENCE TO RELATED
`APPLICATIONS
`
`This application is a continuation-in-part of applica-
`tion Ser. No. 879,356, filed Feb. 21, 1978.
`
`FIELD OF INVENTION
`
`This invention relates generally to window coverings
`and, in particular, to heat-insulative and thermally effi-
`cient window coverings capable of reducing heat loss
`.
`”
`or gain through a window orsimilar ‘thermal open-
`ing”.
`
`BACKGROUND OF INVENTION
`
`transparent walls, and similar ‘thermal
`Windows,
`openings” in buildings have long been known to be a
`major source of heat loss from a building during cold
`periods and of heat gain during warm periods. The
`heating and cooling of a building has thus been known
`to require greater amounts of energy than would be
`necessary in the absence of windowsorother “thermal
`openings”. To the end that windowsandthelike can be
`configured to reduce such heatgains and losses, double-
`layered glass and similar insulative structures have been
`utilized. Further, it has come to be known that window
`coverings, such as shades, blinds, and curtains, provide
`at least some reduction in heat loss and/or heat gain
`relative to an otherwise exposed window.
`As an example of a window shadestructure of in-
`creased thermalefficiency relative to the. substantially
`planar, relatively poor insulative window shading struc-
`tures long knownin the art, Luboshez,in U.S. Pat. No.
`2,874,612, discloses a window shade having sections
`angularly disposed relative to each other, alternate sec-
`tions being coatedonat least one side with a heat-reflec-
`tive material. The Luboshez shadestructure is only one
`example of prior attempts to reduce heat gain, there
`having been similar attempts to reduce heat loss from an
`environmental space. The trapping of air between an
`essentially permanent, non-drawable window covering
`and a window surface. has also been previously de-
`scribed in the art for reduction of heat flow through a
`window,seals being previously provided between such
`coverings and the frame holding the glass pane portion
`of the window to complete a “dead air” space between
`the covering and the window.
`Other patents of interest include British Pat. Nos.
`11,493 and 756,270 and U.S. Pat. Nos. 1,827,218;
`1,937,342; 1,942,989; 2,170,877; 2,477,582; 2,551,736;
`3,055,419; 3,256,931; 3,294,151; 3,294,152; 3,443,860;
`3,465,806; 3,887,739; 3,899,326; 3,946,789 and.4,019,554.
`While some of the window shades or coverings
`which have heretofore been proposed are capable, to
`some degree, of reducing heat loss or heat gain through
`a thermal opening, they are not entirely satisfactory
`particularly in reducing heat loss or gain by “convec-
`tion”. It is a matter of common experiencethat in addi-
`tion to heat loss or heat gain through the windowpane,
`considerable heat is often lost or gained by convection
`through the sides of the window frames. This convec-
`tive heat loss or gain can frequently representa signifi-
`.cant amountofthe total heat or energy.
`
`10
`
`20
`
`25
`
`30
`
`35
`
`45
`
`50
`
`55
`
`60
`
`1
`
`4,307,768
`
`2
`Accordingly, it is an object of this invention to pro-
`vide a shade structure for reducing the total heat loss or
`heat gain through a thermal opening, such as a window.
`It
`is another object of this invention to provide a
`shade structure of unique configuration and design
`comprising a plurality of contiguous channels having
`“dead air” spaces, and a sealing structure extending
`along the window frame uniquely cooperating with the
`specially configured shade structure to insure against
`heatloss or gain, including convective heat loss or heat
`gain through the window.
`It is also an object of this invention to provide a shade
`madeof a generally flexible and resilient material com-
`prising a plurality of contiguous channels of a generally
`honeycomb configuration having a plurality of air-
`entrapping cells, designed to cooperate with the sealing
`structure to minimize heat loss or gain, including con-
`vective heat loss or heat gain through the window.
`The foregoing and other objectsof this invention will
`become apparent from the following detailed descrip-
`tion of the invention taken in conjunction with the ac-
`companying drawings.
`SUMMARY OF THE INVENTION
`
`Shadestructures comprised of a multiplicity of con-
`tiguous air-entrapping channels or lumen,the invention
`provides window coverings having a “depth” formed
`by the air-entrapping channels, the channels forming a
`honeycomb appearance in axial cross section in a pre-
`ferred embodiment. The respective ends of the channels
`are caused to be disposed adjacent to the frame of the
`window,seal structure disposed between the opposing
`surfaces of the frame and edges of the shade (and thus
`the ends of the channels) acting to entrap air within at
`least certain of the channels and primarily between the
`shade and the window,therebyto insulate an interior
`environmental space against heat
`loss or heat gain
`through the window. The channels of the shade are
`preferably formed by construction of the shade from a
`plurality of initially parallel layers of a relatively thin
`and flexible material, each layer being joined to adja-
`cent layers along narrow spaced parallel lines, these
`lines of connection on opposite planar faces of each
`layer alternating in spaced relation to each other. The
`“honeycomb”structure thus formed provides a multi-
`plicity of essentially parallel hollow channels within the
`shade, the channels being substantially equal in size.
`Effective “dead air” volumes thus formed within the
`channels act
`to provide insulative capability to the
`shade.
`Sealing structure provided along vertical and/or
`horizontal edges of the honeycomb shade acts to im-
`pede convective air flow and thus reduce convective
`heat loss orheat gain through the window frame.
`Sealing structures for the horizontal channel embodi-
`ment of the shade include vertical members extending
`from the plane of the vertical window frame surfaces
`and being received within vertically disposed grooves
`in the vertical edges of the shade body in order to com-
`plete formation of a trapped air space between the win-
`dow and the shade. Edges of the shade defining the
`vertically disposed grooves act to seal the shade when
`in the “drawn” position due to contact between said
`65
`edges and opposing surfaces of the vertical members.
`. The vertical membersalso serve as guide rails or tracks
`for maintaining the shade in proper position whenrais-
`ing and lowering the shade.
`
`Petitioner Chanel, Inc. Exhibit 1023
`Page 11
`
`Petitioner Chanel, Inc. Exhibit 1023
`Page 11
`
`

`

`4,307,768
`
`3
`In the vertical channel embodiment of the invention,
`at least one horizontal guide member disposed along the
`lowermost horizontal side of the window frame extends
`from said frame to be received within horizontal
`grooves formedin the lowermost horizontal edge of the
`shade body. Edges of the grooves act as described
`aboveto form a seal with opposing surfaces of the guide
`member. Similar sealing structure is preferably disposed
`along the uppermost horizontal side of the window
`frame.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`FIG. 1 is a detail assembly view of one embodiment
`of a honeycomb shade installation according to the
`invention in a drawn or “‘closed” conformation prior to
`installation in a window frame and having projecting
`guide membersformed integrally with mounting plates
`which fit against vertical window frame surfaces, the
`guide members further serving to provide surfaces
`against which portions of a seal can be formed to pre-
`vent convective heat flow about vertical edges of the
`shade;
`FIG. 2 is a perspective view of the assembled shade
`of FIG. 1 in the drawn or “closed” conformation;
`FIG. 3 is a perspective view of the shade shown in
`FIG. 2 mounted in a window frame, the shade being
`partially retracted;
`FIG. 4 is a perspective view of the assembled honey-
`comb shade of FIG. 2, but in a retracted or “open”
`conformation;
`FIG. 5 is a plan view in section of the structure of
`FIG.3 in a “closed” position, material edges defining
`the vertical slots within which the guide membersre-
`spectively are received being shown contacting the
`guide memberstofacilitate sealing and the side edges of
`the shade body being showntoeffectively contact the
`mounting plates;
`FIG.6 is a detail side elevational view in section of
`the structure of FIG. 2 shown in a drawnor “closed”
`conformation with the mounting plate being cut-away,
`material edges defining the vertical slot within which
`the guide member is received being seen to “neck
`down”or to extend into contact with opposing surfaces
`of the guide member to form an improved convective
`air seal along each vertical side of the shade body;
`FIG.7 is a detailed perspective view illustrating the
`edges of the vertical slots formed in the shade body and
`sealing structure associated with the draw bar;
`FIGS. 8a and 8b are elevational viewsin partial sec-
`tion of a honeycomb shade having guide membersdis-
`posed nearer the “room”side of the shade, the guide
`membersalso acting as in other embodiments to provide
`surfaces against which convective sealing is accom-
`plished through contact with vertical slots formed in
`the shade body and within which slots the guide mem-
`bers are respectively received;
`,
`FIG. 9a is an elevational view in section of a honey-
`comb shade mounted in a windowandillustrating the
`location and operation of pull cords used to raise and
`lowerthe shade;
`FIG. 96 is a detailed sectional view of a planar facing
`portion of the structure of FIG. 9a;
`FIG. 10 is an idealized perspective illustrating the
`manufacture of the honeycomb shadebodyand particu-
`larly illustrating alternately disposed adhesive ‘‘lines”
`whichare laid on sheets comprising the shade body;
`
`~
`
`4
`FIGS. 11-13 are idealized elevational views in sec-
`tion illustrating various embodiments of the honeycomb
`structures useful for forming the shade body;
`FIGS. 14a@ through 14¢ are diagrammatical sketches
`which illustrate varying thicknesses of the shade body
`and the effect of varying thickness on “R” value;
`FIG. 15 is a perspective view of a shade assembly
`having vertically-oriented channels formed in opposed
`shade body portions shownin a partially drawn confor-
`mation;
`.
`FIG. 16 is a plan view in section of the shade assem-
`bly of FIG. 15 in a fully drawn or “closed” conforma-
`tion;
`FIG. 17 is a front elevational view of the shade as-
`sembly of FIG. 15 in a fully drawn or “closed” confor-
`mation;
`FIG. 18 is an elevational: view in section of a shade
`assembly similar to the embodiment of FIG. 15 and
`having a “floating” top seal and lower guide member
`received within horizontal slots formed in the body
`portions of the shade body, the edgesofthe slots acting
`to contact opposing surfaces of the guide memberto
`form a convectiveair seal;
`FIG. 19 is an elevational view in section of a shade
`assembly similar to the embodiment shownin FIG. 15
`and having a top seal comprised of honeycomb mate-
`rial;
`FIG.20 is a front elevational view of a shade assem-
`bly having vertically disposed channels, the shade body
`being continuous;
`FIG. 21 is an idealized perspective view with por-
`tions of structure in diagrammatical form illustrating a
`condition responsive shade lowering structure in a con-
`figuration whereby the shade pull cord is released to
`allow the shade to be displaced downwardly over a
`window dueto gravity;
`FIG. 22 is an idealized perspective view with por-
`tions of structure in diagrammatical form illustrating the’
`condition responsive shade lowering structure of FIG.
`25 in a configuration whereby the shade pull cord is
`held to prevent lowering of the shade;
`FIG. 23 is a detailed side elevational view in section
`illustrating a reflective coating optionally disposable on
`surfaces of the shade adjacent a window;
`FIG. 24is a detailed side elevational view in section
`illustrating a coating on internal surfaces of the shade,
`the coating having low emissivity in the far infrared
`region of the electromagnetic spectrum;
`FIG.25 is.a plan view in section of a shade mounting
`structure wherein the shade body is mounted against
`wall surfaces adjacent a window; and
`FIG.26 is a plan view in section of a further shade
`mounting structure wherein the shade body is mounted
`against wall surfaces adjacent a window.
`DETAILED DESCRIPTION OF THE
`PREFERRED EMBODIMENTSOF INVENTION
`
`25
`
`30
`
`40
`
`60
`
`65
`
`The invention in its general sense provides a draw-
`able shade comprising a shade body and associated
`structure cooperating with portions of the shade body
`to prevent convective heat flow through or about the
`periphery of the shade body. In effect, the associated
`structure acts in concert with the portions of the shade
`body to “seal” against convectiveheat flow. In princi-
`ple, the ‘‘sealing”’ referred to herein is in essence equiva-
`lent to “impeding” convective air flow. The present
`shadestructuresalso act to substantially reduce radiant
`and conductive heat flow through a window or “ther-
`
`Petitioner Chanel, Inc. Exhibit 1023
`Page 12
`
`Petitioner Chanel, Inc. Exhibit 1023
`Page 12
`
`

`

`4,307,768
`
`5
`mal opening” and thus act to reduce heattransfer byall
`of the possible heat transfer mechanisms, a capability
`not possessed by prior art drawable shade structures to
`the degree of efficiency exhibited by the present struc-
`tures.
`
`In a less general sense, the present invention contem-
`plates a drawable shade capable of reducing convective
`heat loss as described above, and wherein the body of
`the shade is formed of a multiplicity of essentially paral-
`lel elongated channels which “surround and contain”
`air, and which effectively create “dead air” spaces,
`particularly insulative against both conductive and con-
`vective heat flow. The associated structure disposed
`about the ‘‘free ”’ sides of the shade body which are not
`fixedly connected to associated mounting structure. For
`example, a vertically displaceable shade according to
`the invention is typically fixed to mounting structure
`along the uppermost horizontal side of the shade body
`and is effectively “sealed” along the “fixed”’ side by an
`essentially permanent connection therealong. The re-
`maining “free” sides of the shade body must therefore
`be “sealed” against convective flow by the associated
`structure referred to above,
`this associated structure
`usually acting in concert with at least portions of the
`shade body itself. The associated structure may also
`provide other functions accessory to the operation of
`the shade. Typically,
`the associated structure which
`assists in sealing those sides of the shade body whichlie
`in the direction of extension of the shade differs from
`the structure which seals the side of the shade body
`lying opposite the fixed side. The associated structure
`assisting and/or providing the described sealing func-
`tion can take a variety of forms, as will be described in
`detail hereinafter.
`Particular embodiments of the invention include the
`formation of a multi-channel shade body having a “hon-
`eycomb” structure as shown, for example,
`in FIGS.
`10-14. In these embodiments, the channels are formed
`by thin sheet-like layers of material joined together
`along spaced parallel
`lines by an adhesive material,
`these adhesion lines being alternatingly disposed be-
`tween adjacent
`layers of material on opposite sides
`thereof.
`Referring now to the drawings, and particularly to
`FIGS. 1-5, one embodimentof the present shade assem-
`bly is seen at 10 for installation within a standard win-
`dow frame 12 in which is mounted. conventional glass
`panes 14 either permanently or for movement with a
`window in a conventional manner. The shade assembly
`comprises a shade body 16 having a multiplicity of
`regularly arranged contiguous cell-like channels 18
`extending throughout said body 16,
`the longitudinal
`axes of the channels 18 extending horizontally through
`the shade body in essentially parallel manner. The chan-
`nels 18 serve to entrap or to at least temporarily hold air
`therewithin to contribute to the insulation of the inte-
`rior environmental space from heat flow across the
`window orother thermal opening. Dead air spaces are
`thus effectively formed within the channels 18. Pre-
`ferred structural conformations of the channels 18 will
`be described hereinafter relative to FIGS. 10-14 inter
`alia.
`The shade body 16 is drawable into a compact vol-
`umewithin storage compartment 20 when.in the stored
`or “open” conformation as shown in FIG. 4. The shade
`body 16 can be drawn by meansofa pull cord arrange-
`ment such as described hereinafter relative to FIGS. 9a
`and 98, Alternately, the shade body 16 can be manually
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`raised and lowered or can be displaced through the use
`of other conventional draw structure. As can be noted
`through a comparison of FIGS.2 and 4, the shade body
`occupies in the stored or “open” conformation, a vol-
`umewhichis substantially reduced relative to the shade
`body volume of the drawn or “closed” conformation.
`Thus, the shade body 16 is compactly stowed within a
`relatively insignificant volume when not in use. The
`upper horizontal side of the shade body is permanently
`mountedto a lowerface of aninterior, rectangular plate
`member22 in a conventional manner. The plate mem-
`ber 22 can conveniently form a portion of the storage
`compartment 20. The shade body 16is thuseffectively
`“sealed” against convective heat flow along its upper
`horizontalside.
`the shade
`As is shown particularly in FIGS. 1~5,
`assembly 10 comprises the shade body 16 andthestor-
`age compartment 20 which is defined by header plate
`17, upper plate 19 and rearplate 21, the plates 17, 19 and
`21 forming the U-shaped storage compartment 20
`within which the plate member 22 is disposed. The
`upper horizontal side of the shade body 16 could, of
`course, be mounted directly to the underside of the
`upper plate 19. The plates 17, 19 and 21 are formed of
`wood,plastic, metal or other suitable relatively rigid
`material and cooperate with T-shaped side frames 23
`and bottom plate 24 to form a framework of the shade
`assembly 10 within which the shade bodyis raised and
`lowered.
`In practice,
`the framework formed of the
`plates 17, 19 and 21, the T-shaped side frames 23 and the
`bottom plate 24 can be sized to fit directly into the
`window frame12as is particularly seen in FIG. 3. The
`dimensions of the framework can be custom sized
`(along with custom sizing of the shade body16)tofit a
`particular window orthe entire shade assembly can be
`mass produced to fit windows of standardsizes. In ei-
`ther situation, the T-shaped side frames 23 are mounted
`flush against the vertical side wall surfaces 25 of the
`window frame 12. Outer surfaces 26 of the T-shaped
`side frames can be adhered to the wall surfaces 25 or
`otherwise mounted thereto in order to preventair flow
`between the frames 23 and surfaces 25.
`In a situation where the frames 23 are not directly
`attached to the plates 17, 19 and 21 and/or to the bot-
`tom plate 24, a contact adhesive and sealant or other
`adhesive material could be pre-coated onto the outer
`surfaces 26 of the T-shaped side frames 23. Mechanical
`fasteners could alternatively be employed to mount the
`side frames 23 to the window frame 12. The bottom
`plate 24 can be omitted entirely from the shade assem-
`bly 10, particularly in those situations where the T-
`shapedside frames 23 andtheplates 17, 19 and 21 are to
`be mounted separately in the window frame 12. In such
`situations, lower horizontal surface 27 of the window
`frame 12 can cooperate with draw bar 28 to form a
`lower horizontal seal, which seal would,
`in the case
`where the bottom plate 24 is included in the total frame-
`work, be provided by cooperation between the draw
`bar 28 and the bottom plate 24.
`When the shade assembly 10 is “drawn’’, the shade
`body 16 can be “sealed” along the lower horizontal side
`thereof by contact with the bottom plate 24 or with the
`surface 27 of the window frame12 in the event that no
`bottom plate 24 is provided. When the surface 27 (on
`the upper surface of the bottom plate 24)is essentially
`flat and thus allows even contact with the lowerhori-
`zontalsurface of the draw bar 28, further sealing struc-
`ture is not required along the lower horizontal side of
`
`Petitioner Chanel, Inc. Exhibit 1023
`Page 13
`
`Petitioner Chanel, Inc. Exhibit 1023
`Page 13
`
`

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`4,307,768
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`7
`the shade body 16. However, as will be described in
`more detail hereinafter, additional sealing structure is
`preferably provided in order to create a more effective
`seal. As a practical matter, window framesarenot suffi-
`ciently “plumb” to allow mere contact between the
`vertical and lower horizontal sides of the shade body to
`provide sealing of the degree deemed desirable. Some
`reduction in heat transfer would, of course, be pro-
`duced by such a structure. The draw bar 28 is simply
`attached to the lower horizontal side of the shade body
`16 as shownin FIGS. 2, 3, 4 and 7 with similar embodi-
`ments also shown in FIGS. 8 and 9.
`The draw bar 28 adds weight to the lowermostside of
`the shade body 16 and thusassists in drawing the shade.
`The disposition of a flat, substantially planar surface
`along the lowermost horizontal surface of the draw bar
`28 facilitates a sealing contact with either the surface 27
`or with the bottom plate 24, thereby to form at least a
`minimal convective “seal” along the lower horizontal
`side of the shade body 16. Although use of the draw bar
`28 is preferred, the bar 28 can be omitted and the lower
`horizontal edge of the shade bodycan “seal” against the
`surface 27 or the bottom plate 24. In either situation, the
`lower horizontal side of the shade body 16 or the hori-
`zontal undersurface of the draw bar 28 can befitted
`with additional structure to facilitate formation of the
`seal between the shade body 16 and the surface 27 on
`the bottom plate 24.
`Asis seen in FIGS.4 and 7, one or more elastometric
`“wiper” blades 29 are disposed on the lower horizontal
`surface of the draw bar 28 and extend downwardly.
`Whenthe shade body 16 is fully lowered, the blades 29
`bias resiliently against the surface 27 on the bottom
`plate 24 to facilitate sealing therebetween. The blades
`29 are preferably arcuate in conformation and can ex-
`tend laterally at distal ends thereof to increase the com-
`pressive sealing effect.
`In the particular embodiment of FIGS. 1-7 and also
`in- certain other embodiments shown and described
`herein, convective sealing along the vertical sides of
`shade body 16 can be accomplished through the use of
`structure which canalso act to guide the shade bodyin
`a desired path whenthe shadeis raised or lowered. As
`has been previously noted, the T-shaped side frames 23
`are attached to the window frame 12 along vertical
`frame surfaces and essentially extend the full vertical
`height of the window frame. The leg portion of each
`T-shaped side frame 23 extends inwardly from side
`plate portion 30 and formsa slat-like member generally
`rectangular. This leg portion of each T-shaped side
`frame 23 assists in forming a convective seal along the
`respective vertical sides of the shade body16 andis thus
`referred to as sealing slat 32.
`Thesealing slats 32 can be formed integrally with the
`corresponding side plate portion. 30 of each T-shaped
`side frame 23. Alternatively, sealing slats 32 alone can
`be mounted directly to respective inner vertical walls of
`the window frame 12 and thus extend inwardly of the
`window frame 12. In this and in certain other embodi-
`ments of the invention, major portions of the sealing
`slats 32 are received within elongated vertical slots 40
`formed in respective vertical sides of the shade body 16.
`Theslots 40 extend the full vertical sides of the shade
`body 16. The slots 40 extend the full vertical height of
`the shade body 16 regardless of whether the shade body
`is fully retracted or fully drawn out to cover the win-
`dow opening.In the fully retracted position, the slots 40
`will have a “length” which is much less than the
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`“length” of the slots when the shadeis fully drawn,just
`as the shade body 16 is much reduced in the vertical
`dimension when retracted. The slots 40 are essentially
`cut from the vertical sides of the shade body 16 such as
`by stamping when the material from which the shade
`body 16 is formed is in its most compact configuration,
`the innermost adjoining central.channels 18 have sub-
`stantially U-shaped cuts thus formed therein, a shade
`body typically having portions of the U-shaped cut
`formed in adjoining channels.
`Although not shown, the faces 34 and 36 ofthe seal-
`ing slats 32 are spaced from opposing side edges 44 and
`central edges 46 of the slots 40 when the shade body 16
`is “open”or fully retracted. In particular, a small spac-
`ing betweenthe side edges 44 ofthe slots 40 and the side
`faces 34 of the sealing slats 32 is preferred when the
`shade body 16is fully retracted in order for the shade
`body to be capable of a more free movementalong the
`sealing slats 32 as the shade is drawn outto the ‘“‘closed”
`position. While the shade body 16 could be drawn from
`the fully retracted position of FIG. 4 even if contact
`between the side edges 44 andthe side faces 36 occurred
`when in this position, substantial friction results from
`such contact due to a “necking down”ofthe edges 44 as
`the shade bodyis fully extended. This “necking down”
`and the particular advantages obtained from this char-
`acteristic of the shade body 16 when formed of the
`honeycombstructure accordingto the invention will be
`hereinafter described in connection with FIGS.5 and 6.
`Thevertical sides of the shade body 16 and opposing
`inner vertical surfaces 34 of the side frames 23 (or of the
`window frame 12) are essentially flush and are in
`slightly “brushing” contact as the shade bodyis raised
`and lowered. This contiguous fit provides an impedi-
`ment or “seal” against convective heat flow along the
`vertical sides of the shade body, and thus can constitute
`a “sealing” structure formed bythe vertical sides of the
`shade bodyitself when allowed to contactthe vertical:
`surfaces 34 of the side frames 23. This brushing contact
`also acts to reduce and restrict air flow through the
`channels 18, thereby to effectively “seal” the interior of
`the channels from ambient and thusto create “dead air”
`volumes within said channels. This “sealing” structure
`thus acts to reduce air movement between that air space
`lying between the glass panes 14 and the shade body 16
`and the environmental space. The “sealing” structure
`also acts to reduce air movement through the channels
`18. In effect, this “sealing” structure acts as a “seal”
`against convective flow between the environmental
`space, that is, a room in a dwelling or the like, and the.
`insulating air space effectively trapped between the
`panes 14 and the shade body16.
`Thesealing slats 32 also serve a “guiding” function
`by providing “track” structure along which the shade
`body 16 moves