Retractable screen system and improvements therefor

A continuous roll of screen which may be payed out from said roll by an installer or manufacturer to a required predetermined window size, or alternatively patio door size, said screen comprising a free end which allows the installer to pay the screen off of the roll upon which the screen is accumulated course upon course, one end of said screen being disposed at the end of the courses accumulated on the roll from which the screening is payed off and the other end being a free end, said screen having side edges and preferably being manufactured from preferably vinyl-coated fiberglass, the edges of said screen having affixed thereto a generally preferably T-shaped key manufactured from a flexible material, for example polyvinyl chloride, which is affixed preferably by radio frequency welding (or RF welding) with the edges and preferably each of the edges, and in one embodiment at least one edge of said screen, wherein the vinyl coating provided on the screen melds with the polyvinyl chloride key to form a resilient anchor for the screen device within any screen roller assembly.

FIELD OF INVENTION
 This invention relates to a retractable screen system for a closure
 assembly and improvements thereof which allows the secure sliding and
 subsequent retraction of the screen from a operative position to a
 retracted position. The invention is preferably embodied in a window
 assembly but finds application also in large pivoting windows and patio
 doors.
 BACKGROUND OF THE INVENTION
 The reader is referred to Appilcants Co-pending Applications abovementioned
 for teachings in relation to improvements to closure assemblies, the
 teachings thereof which are hereby incorporated by reference.
 Screens are generally provided for doors, patio doors, and windows. One
 particular type of screen utilized for patio doors for example, includes a
 metal frame having a groove disposed around its edges. The screen is
 affixed to the frame by using a spline, a long extended piece of flexible
 material, which is forced into the groove capturing the edges of the
 screen. The screen is then slid in front of the opening when the patio
 door is moved to an opened position. The screen therefore permanently
 blocks the view of the occupant of the dwelling. The same is true for
 screens provided with double-hung windows, tilt and slide windows, and
 casement windows. The screen generally is always in position whether the
 window is opened or closed.
 Various examples therefore have been developed by inventors to address this
 problem.
 For example, U.S. Pat. No. 5,505,244 to Thumann describes a retractable
 covering for a door including a housing containing a roll of screen as
 best seen in FIGS. 2, 5, 6A and 6B thereof. The cover may be affixed to a
 door adjacent the frame thereof as an after-market product.
 Another example of an after-market type of product is found in U.S. Pat.
 No. 4,821,786 as best seen in relation to FIG. 6 therein, the structure is
 adapted to be mounted on one side of a door jamb to be releaseably
 connected to the other. The assembly is quite complicated and complex and
 may be considered as an add-on structure.
 Similarly, U.S. Pat. No. 3,911,990 provides a screen in combination with a
 sliding door. The screen is disposed upon a spring-loaded roller installed
 on the exterior of the framing sections of the opening adjacent to the
 window frame.
 U.S. Pat. No. 4,757,852 describes a box-like housing carrying a tube for
 paying out and taking up a mesh screen. The housing is fastened over a
 window or door and is not part of the framing section of the door.
 U.S. Pat. No. 4,651,797 describes a roll-up screen door included in a
 narrow housing containing a conventional spring-biased roll onto which
 flexible screen material is taken up and paid out. The housing is mounted
 adjacent one side of a vertical curved strip along one side of the door
 casement opening. The front vertical edge portion of the screen material
 is anchored within a vertical groove of the anchoring strip as best seen
 in FIGS. 3 and 5. Again, the housing extends from the framing section and
 is not part thereof. A more complex arrangement is found in U.S. Pat. No.
 4,359,081 and U.S. Pat. No. 4,261,524.
 Referring now to U.S. Pat. No. 1,150,000 to Matthews, there is described a
 window screen coiled on a roller for installation on a window frame. The
 roller for the window is illustrated in FIG. 5 including a hook portion
 for hooking a complementary hook portion on the screen. The other edge of
 the screen includes a hook portion for engaging with the trim portion 34.
 U.S. Pat. No. 1,141,996 to Vanasdale describes another type of roller
 screen which may be attached to the sill or lintel portion of the frame by
 mounting brackets as best seen in relation to FIGS. 1 through 6.
 None of the above-mentioned references teach or even infer the installation
 of a screen within the framing sections of a closure assembly such as a
 jamb. Each of the products may be considered as an after-market product
 which is installed upon, adjacent to, on or butting up against the framing
 section of the appropriate closure member. In essence, some of the
 installations are unsightly with a housing extending from the general
 plane of the home or window, extending either outwardly away from or
 inwardly toward the interior being closed by the closure member. It would
 therefore be advantageous to solve this problem by providing a screen
 assembly which may be contained within the framing sections of a closure
 assembly and which retracts into the frame member and which is
 substantially invisible until such time as needed.
 U.S. Pat. No. 4,825,921 describes a screen assembly having supporting
 elements secured along the edge of the material as best seen in relation
 to FIGS. 4 and 7. The structure also includes a spring-biased element
 which rides in a track. As best seen in FIGS. 9 through 11, the screen is
 considered to be an add-on, after-market device as well.
 U.S. Pat. No. 3,842,890 to Kramer describes a coilable closure device as
 best seen in FIGS. 1 and 18 which includes a frame including a side jamb
 and a storage jamb, 34 and 36 respectively. The coilable closure device
 does not include a post and includes a multiplicity of sections as best
 seen in FIGS. 1 and 6 which sections include elements extending up into
 and down into respective track areas provided with the frame. The material
 which coils upon itself is particularly plastic sheet including
 reinforcing ribs which also act as guiding elements for the sheet.
 However, nowhere within the reference does it teach the use of such a
 structure for a screen, but merely as a closure to replace a door between
 adjacent rooms, for example. Nowhere within the reference does it teach
 the combination of a closure member such as a window or patio door and a
 screen. This is simply not described. Therefore, one would not be
 motivated to solve the problem of combinations of closure members and
 screens by the reading of the Kramer reference.
 There are a number of manufacturers producing a style of screen in a kit
 form to be assembled onto the exterior of a housing on existing windows as
 an after-market product.
 Known screen fastening technologies fastens the screen cloth to the drum
 with tape, glue, and other bonding methods. The handle may have the screen
 cloth affixed thereto by using conventional attachment methods such as
 utilizing a semi-flexible bead pressed into a groove or by sandwiching the
 screen between a two part mechanical handle profile which may be fastened
 by screws, rivets or the like. Preferred Engineering has made attempts at
 crimping the screen into a metal edge and inserting the edge into the drum
 and the handle as described in the parent application. Although a
 reasonable approach it has been determined that no flexibility is achieved
 by such a joint and the screen still had a tendency to tear.
 Nowhere therefore within the prior art is there taught improvements to
 screen assemblies, wherein the entire screen assembly is contained within
 the framing sections found adjacent to a closure member in a closure
 assembly, for example a window assembly. Further, nowhere within the art
 is there found a roll-out screen assembly embodied in a cassette which may
 be readily inserted within the hollow of a framing section sized to
 receive said cassette or screen assembly. Further, nowhere in the prior
 art is there manufactured a screen having an abutment on one edge thereof
 for engaging with a cooperative abutment on the roller of a screen
 assembly which may be cut to size as desired to repair a roller screen
 assembly. Further, nowhere within the prior art is there found various
 improvements to roll-up screen assemblies to simplify their installation,
 adjustment and replacement.
 Nowhere within the prior art is such a simplified improved screen assembly
 provided which retracts into the jamb, sill or header of the frame portion
 of a window assembly in the retracted position and which is preferably
 guided to its operative position in guides provided with the jamb, sill or
 header, and which allows for the manufacture of heavier screens in larger
 sections without continuously covering of the window.
 It is therefore an object of this invention to overcome many of the
 deficiencies in the prior art stated above which allows for smooth and
 simple operation of a retractable screen which is capable of both sliding
 within a guide channel between the retracted and the operative positions
 and which at the retracted position is fully contained within the jamb,
 sill or header section of the closure assembly.
 It is a further object of the invention to provide a retractable screen
 assembly of appropriate size and construction to replace existing
 retractable screen assemblies for casement, double hung and/or tilt and
 slide windows as well as patio doors.
 It is further a primary object of this invention to provide a roll-up
 screen embodied in the frame of a closure assembly which is retractable
 into the frame itself without requiring an additional housing.
 It is a further object of the invention to provide a roll-up screen
 assembly in the form of a cassette which may be mounted within the hollow
 of a framing section, which cassette includes a front facia portion to
 close the framing section.
 It is yet a further object of this invention to provide a continuous roll
 of screen manufactured so as to be cut at a predetermined width and
 include an anchoring element disposed adjacent one edge of the screen so
 as to allow ease of installation of the original or replacement screen.
 It is yet a further object of the invention to provide a method of
 manufacturing a screen.
 It is yet a further object of the invention to provide a cassette which may
 be side mounted into an opening of the framing section and closed by an
 exterior facia element.
 It is yet a further object of the invention to provide a closure assembly
 including a roll-up screen contained with one of its framing sections
 adjacent the closure member.
 It is yet a further object of the invention to provide improvements in
 mounting brackets, facia elements, and screens.
 It is a further object of this invention to develop a product that provides
 parallelism to opposing screen and handle edges which provides accurate
 paying out and accumulating on the roller so that the screen winds up
 precisely without twisting or binding.
 It is a further object of the invention to provide a screen assembly having
 high strength and resistance to tearing which will not tear or peel from
 the corners and is easily able to accept dimensional variation in the
 window opening being covered.
 It is a further object of the invention to provide a screen assembly which
 facilitates facilitates ease of manufacture, and replacement.
 Further and other objects of this invention will become apparent to a man
 skilled in the art when considering the following summary of the invention
 and the more detailed description of the preferred embodiments illustrated
 herein.
 SUMMARY OF THE INVENTION
 This invention relates to a retractable screen system for a closure
 assembly and improvements thereof which allows the secure sliding and
 subsequent retraction of the screen from a operative position to a
 retracted position. The invention is preferably embodied in a window
 assembly but finds application also in large pivoting windows and patio
 doors. The closure member may further comprise a window sash being a
 casement, double hung, or tilt and slide installation or, a door or a
 patio door.
 There is therefore provided improvements to screen assemblies, wherein the
 entire screen assembly is contained within the framing sections found
 adjacent to a closure member in a closure assembly, for example a window
 assembly. Further a roll-out screen assembly is embodied in a cassette
 which may be readily inserted within the hollow of a framing section sized
 to receive said cassette or screen assembly. The screen has an abutment on
 one edge thereof for engaging with a cooperative abutment on the roller of
 a screen assembly which may be cut to size as desired to repair a roller
 screen assembly which simplifies their installation, adjustment and
 replacement.
 There is also provided a simplified improved screen assembly which retracts
 into the jamb, sill or header of the frame portion of a window assembly in
 the retracted position and which is preferably guided to its operative
 position in guides provided with the jamb, sill or header, and which
 allows for the manufacture of heavier screens in larger sections without
 continuously covering of the window.
 In a tilt and slide, casement or double hung window a retractable screen is
 provided disposed within the header, sill or jamb of the assembly which
 screen accumulates on and pays out from a spring biased roll disposed
 within said header, sill or jamb, the screen being retractable for egress
 or cleaning purposes, and available as desired by providing a detent on
 the opposing framing member engageable with a detent provided with the
 screen when in its operable position.
 According to yet another aspect of the invention there is provided a window
 assembly comprising a retractable screen disposed within a framing portion
 of the assembly, the screen accumulating on and paying out from a spring
 biased roll disposed within said frame portion, the screen being
 retractable for egress or cleaning purposes, and available as desired by
 providing a detent on the opposite frame portion engageable with the
 screen when in its operable position.
 According to yet another aspect of the invention there is provided a
 closure assembly comprising a retractable screen disposed within a framing
 portion of the assembly, said framing portion providing a pocket within
 which the screen is contained in use, said pocket being bound by three
 sides of said framing portion thereby forming said pocket, said pocket
 being closed by a separate cover closing said framing portion, preferably
 said retractable screen being mounted on said cover and being positioned
 in said pocket when the cover closing the pocket is installed preferably
 by clipping a detent provided with said cover in a channel provided with
 one of the sides of said framing portion providing the pocket, the screen
 accumulating on and paying out from a spring biased roll disposed within
 said frame portion, the screen being retractable for egress or cleaning
 purposes, and available as desired by providing a detent on the opposite
 frame portion engageable with the screen when in its operable position.
 According to yet another aspect of the invention there is provided a
 continuous screen formed as a continuous web and adapted to be utilized
 for a retractable screen for windows, doors and the like having a
 predetermined width of screen determined by the width or length of the
 closure member frame, said width of said screen having two ends,
 preferably each of the ends having an anchor or key shaped element fixed
 thereto adapted to engage a detent on a handle proximate one end of the
 screen and adapted to engage a detent of a preferably spring biased,
 preferably hollow, roller utilized for taking up and letting out the
 screen in a coil upon said roller, alternatively the handle end of the
 screen alternatively having a tape or continuous strip of adhesive applied
 thereto so as to engage and be captured by a handle portion of said screen
 when utilized in a closure assembly, said screen and said anchor or key
 shaped elements being cut at a predetermined length to fit said roller
 when assembled and being installed with said closure assembly and
 preferably within a hollow of one of said frame sections, wherein said
 screen may be utilized as an original installation or as a replacement
 screen for an original installation.
 According to yet another aspect of the invention, there is provided a
 retractable screen assembly for a closure assembly, said closure assembly
 including a closure member surrounded by framing portions from which the
 closure member is supported, said closure member including framing
 sections, one of said framing sections providing a pocket within which
 said screen assembly is retained in use, said screen assembly comprising a
 cassette engageable with the interior of a cover utilized for closing the
 framing portion and pocket of the closure assembly, preferably said pocket
 being located proximate the sealing end of the closure member, said
 retractable screen including a handle portion affixed thereto including a
 first detent, the opposite jamb from said pocket including a latching
 portion including a second detent which engages the first detent of the
 handle portion when the screen is in the fully open position, wherein said
 cassette may be installed within any convenient pocket disposed within the
 framing portions of a closure assembly and fixed in position once the
 cover covering the pocket is installed. In a preferred embodiment,
 brackets are provided having channels which capture preferably T-shaped
 guides on the interior of said cover which allow for the fixing of the
 brackets in relation to the specific screen assembly being installed, said
 screen assembly also including a hollow tube to which said screen is
 anchored via a detent on the tube and via a detent on one end of said
 screen, the other end of said screen including another detent for engaging
 with the detent of a handle portion of said assembly, said tube having
 inserted within the ends thereof a pin assembly which will not rotate in
 relation to said tube as a result of rib portions disposed with said
 assembly engaging rib portions disposed within the hollow of said tube,
 each of said pin assemblies including a pin for engaging a pin-receiving
 opening disposed with each of said brackets, wherein said brackets may be
 fixed with respect to the interior of said cover thereby fixing the entire
 screen assembly as a cassette, one of said brackets being adjustable in
 relation to said torque tube in order to allow for adjustment and
 variations from installation to installation, preferably said handle
 portion including telescoping guides which capture the ends of said screen
 and are retained within a hollow within said handle, said guides for
 riding within a channel disposed with opposite or opposing framing
 sections to guide the screen across the opening defined by said closure
 member when desired. In an alternative embodiment, the brackets may
 include a box-like element which rests at the bottom of a framing section
 and being locked in position because of the compatible dimension of the
 bracket with the framing section and adjustable in position in relation to
 that bottom in order to provide for variations in manufacturing.
 According to yet another aspect of the invention, there is provided a
 method of assembling a retractable screen cassette comprising:
 (1) providing a tube upon which said screen will coil up in use,
 (2) providing a pin assembly insertable into the open ends of said hollow
 tube and being prevented from rotating with respect to said tube as ribs
 disposed with said tube, engaged ribs disposed with said pin assembly,
 (3) providing a torsion spring having ends which are engageable with said
 pin assembly ends for providing the correct torsion and tensioning of said
 spring,
 (4) inserting said spring within the hollow tube and inserting said pin
 assemblies within said hollow tube and fixing the ends of said pin
 assemblies to the tyne portions of said torsion spring,
 (5) providing brackets from which said pin assemblies will be adjustably
 inserted, said brackets being locked in place with respect to the
 assembly, preferably either by engaging with a detent provided with a
 flexible cover or alternatively by engaging with the bottom of the framing
 section,
 (6) adjusting said brackets in relation to the distance from one another so
 as to correctly tension and carry the screen assembly,
 (7) fixing said screen on said screen assembly by anchoring said screen to
 said tube via a detent, preferably a T-shaped detent or key for engaging
 with a key slot on the tube or alternatively by using welding or adhesive,
 and coiling said screen upon said tube,
 (8) fixing said opposite end of said screen to a handle portion either
 preferably by a T-shaped detent engaging a T-shaped detent with said
 handle, or by welding or an adhesive,
 (9) coiling said screen upon said tube,
 (10) preferably engaging said cover portion with said brackets,
 (11) inserting said screen assembly within a pocket of said closure
 assembly in one of the framing portions thereof,
 (12) covering said pocket with a flexible cover.
 According to yet another aspect of the invention, there is provided a
 continuous roll of screen which may be payed out from said roll by an
 installer or manufacturer to a required predetermined window size, or
 alternatively patio door size, said screen comprising a free end which
 allows the installer to pay the screen off of the roll upon which the
 screen is accumulated course upon course, one end of said screen being
 disposed at the end of the courses accumulated on the roll from which the
 screening is payed off and the other end being a free end, said screen
 having side edges and preferably being manufactured from preferably
 vinyl-coated fiberglass, the edges of said screen having affixed thereto a
 generally preferably T-shaped key manufactured from a flexible material,
 for example polyvinyl chloride, which is affixed preferably by radio
 frequency welding (or RF welding) with the edges and preferably each of
 the edges, and in one embodiment at least one edge of said screen, wherein
 the vinyl coating provided on the screen melds with the polyvinyl chloride
 key to form a resilient anchor for the screen device within any screen
 roller assembly. Preferably the polyvinyl chloride preferably generally
 T-shaped key has a head extending from a leg in the shape of a preferred
 T, or alternatively a Y, or any other convenient shape so long as said
 shape is compatible with the receiving groove on the handle and roller
 tube, the leg of said key preferably including two separable portions
 within which the edges of a screen interfit prior to RF welding. The
 screen is payed off of the roll upon which it is accumulated to the
 desired dimension of the window or closure such as a patio door wherein
 the screen will be installed, said screen being cut at that predetermined
 length cutting also the key proximate at least one end of said screen,
 said screen thereafter being installed in the screen assembly or
 alternatively replacing the existing screen in a convenient quick
 replaceable format. Preferably the generally key-shaped edge portion of
 the screen having the two legs which capture the screen therebetween prior
 to RF welding includes an extension portion between the head of the
 preferably T-shaped key and the two portions capturing the screen and said
 extension not being RF welded to the screen. This extension portion is
 utilized to provide a flexible zone and accommodates flexing in the screen
 assembly in a zone other than the screen. This zone is designed to stretch
 a predetermined amount and thereby minimize tearing of the screen when
 subjected to a tensioning load. In a preferred embodiment, the screen
 which is cut to size for the assembly is installed in a screen assembly
 with one of the keys being installed in a preferably spring-biased roller
 upon which the screen will accumulate, -and the keyed edge remote said.
 roller is attached to a handle, said roller and said handle each having a
 compatibly-shaped groove, channel or recess disposed therein to capture
 the key portion proximate the edges of said screen. In a preferred
 embodiment, the screen is included in a screen roller assembly embodying a
 cassette which is installed within a pocket defined in a closure assembly
 of any of the closure assemblies defined above in any of the apparent
 applications which are hereby incorporated by reference. The screen
 assembly may also be utilized in known conventional window assemblies. The
 pocket provided in the window frame is sized of a predetermined shape to
 accept the roller screen assembly which includes all of the necessary
 mounting pivots and preferably the mounting brackets to mount the roller
 screen assembly within the pocket in the window frame and preferably
 proximate the inside corner of the jamb or sill or header, depending on
 whether the window is a tilt-and-slide window or a double-hung window. For
 example, a jamb pocket would comprise two inside sides of a jamb of a
 window or patio door frame assembly, said jamb provides a pocket between
 said sides within which said roller assembly may be installed utilizing a
 corner bracket installed where the two sides of the jambs meet, or
 substantially at that point. The jamb sections or alternatively the sill
 and header also include recesses proximate the distall ends thereof for
 each of the sides thereof to accommodate a snap-fit cover. In this way,
 the roller assembly can be proofed, that is to say installed and tried and
 proven prior to installing the cover unlike the previous embodiment which
 described the roller cassette being installed on the cover and being
 snapped into place. It has been discovered that it is much more efficient
 and convenient to install the roller assembly separately in the pocket
 utilizing a corner bracket and a snap cover.
 In another embodiment, the roller assembly is installed within a casement
 window assembly. In a further embodiment, the roller assembly is installed
 within a tilt-and-slide window assembly. In another embodiment, the roller
 assembly is installed within a double-hung window assembly. In another
 embodiment, the roller assembly is installed within a patio door assembly.
 In a preferred embodiment, any of the aforementioned window assemblies may
 further comprise grooves disposed adjacent to the sill and header, or
 alternatively the vertical jambs depending on the window type to receive
 an extension portion of the handle of the screen assembly also engaged
 with the keyed edges of the screen assembly described above and at the
 same time engaging the grooves (or channels or the like) to maintain the
 parallelism of the top and bottom or side portions in motion depending
 again on the window type as the screen is payed out and accumulated on the
 screen roller contained with the pocket provided in the frame.
 In a preferred embodiment of the invention, the handle portion disposed
 proximate one edge of said screen assembly includes a latch portion, which
 is preferably disposed centrally in the handle portion, said latch portion
 for engaging a compatible detent disposed proximate the edge of a window
 sash and moveable between a position wherein said latch engages said
 detent of said window sash whereat when said window sash is slid within
 its track, said screen will pay out from said roller automatically, and
 when said window is returned to its closed position said screen will
 accumulate on said roller automatically, wherein at an unlatched position
 said window will move between its opened and closed position without the
 screen, wherein should it ever be required to reengage the screen with the
 detent on the window sash, the user merely slides the window to the closed
 position wherein the latch of said screen will engage with the detent of
 said window sash automatically. Preferably the leading edge of said detent
 provided with said window sash has a chamfered edge to cause the latch
 including a hook portion to ride up on said chamfered edge and engage with
 a compatible hook portion disposed with said detent of said window sash.
 According to yet another aspect of the invention, there is provided a
 method of manufacturing a screen roller assembly comprising the following
 steps:
 1) forming a screen from suitable screen material such as fiberglass and
 preferably coating said screen with vinyl,
 2) forming a generally key-shaped anchor for said screen preferably from,
 polyvinyl chloride, preferably said key having a head and a leg comprising
 two portions and a connector connecting said leg to said head, preferably
 said head being generally T-shaped,
 3) separating the two leg portions for receiving the edges of said screen,
 4) radio frequency welding said leg portions capturing said edges of said
 screen and preferably melding said vinyl of said screen with the PVC of
 said key,
 5) forming a continuous screen to be accumulated on a roll as roll stock to
 be supplied to the window manufacturer or repair organization,
 wherein at any time a predetermined amount of screen may be payed of the
 roll stock roll sized to a predetermined window opening size which may be
 easily assembled with the spring-biased roller upon which the screen will
 accumulate by a manufacturer or by a repair person and which also may be
 engaged with the handle portion proximate the other edge of said screen,
 both said roller and said screen handle including a compatibly shaped
 generally key-shaped receiving portion to receive the head of said key for
 easy installation or replacement thereof.
 In a preferred embodiment, the screen may be installed in any assembly as a
 replacement screen.
 It is important that the legs of the key portion be separated from the head
 portion by a flexible extension to allow for the accommodation of
 stretching in the screen assembly at that particular location when
 assembled without: destroying the screen. It has been found that the
 screen when melded together with the PVC key has considerably more
 strength than the known methods of taping and gluing screen edges to
 rollers and handle portions. The flexibility is provided by the flexible
 key shape and material. Any suitable material can be utilized including
 those materials which readily accept hot welding. However, radio frequency
 welding is preferred because one does not have to allow for creeping of
 the material and the allowances of temperature differentials. Cold dies
 may be provided which come together to provide a reliable joint which may
 be accurately controlled.
 The present invention advantageously fits into any existing frame design
 thereby reducing cost, easing assembly and improving appearance. It is
 only neccessary to provide a pocket with the jamb, header or sill of any
 window design within which the screen roller assembly is placed preferably
 as a cassette.
 According to the latest aspect of the invention a roll of improved
 continuous screening is provided comprising a preferably "T" shaped edge
 preferably formed from tough flexible material fused to to the screen
 material along the edges of the screen to which a handle and drum are to
 be fixed, preferably said "T" edge being provided proximate both edges of
 a continuous roll of mesh. Since any excess screen material is stored on a
 screen roller making up the screen assembly as previously described one
 may only need as little as one or two standard widths of screen size to
 service the industry. The other dimension is cut to length and need not be
 accurate as it rides in a track in the window assembly.
 To produce a screen one cuts from roll stack the "T" edge screen to fit
 inside the frame opening of the window allowing for the guiding track
 depth less any clearances required. The roller drum and handle are cut to
 screen length providing for clearance as required. The "T" edge of the
 cloth is slid into the drum slot and the other "T" end being slid into the
 handle slot thereby fixing the screen to the critical components. A
 telescoping glide with its own "T" slot groove supports the screen in the
 guide track at each end thereof and allows the glide the freedom to move
 back and forth on the "T" edge of the screen taking up the opening
 tolerance.
 Because the "T" edge is flexible and able to stretch, any local load on the
 screen cloth will distribute itself over a wide range of fibers of the
 screen thus improving the impact and tear resistance of the system. In the
 event that screen was pushed it would pay out the stored material to the
 end limit reducing dramatically the stress forces on the system. With the
 high tensile capability of the "T" edge system, the risk of failure of the
 system is greatly reduced. In servicing a screen that is already installed
 on site, a bolt of screen cloth carried by the service person need only be
 cut to the right length, the cover removed from the system to give access,
 the old screen cloth slide out and the new screen cloth rethreaded. There
 is no need for any other component replacement if they are sound.
 In a preferred embodiment the "T" shaped key may further comprise a "T"
 head which will hold the screen into a compatible substantially
 dovetail-like groove disposed with the roller and/or the handle, a fusing
 zone where the screen is fused to the "T" with the head being preferably a
 min. 0.375 inches, and a body zone between the head and the fusing zone
 with no screen material for providing the flex and stretching of the
 screen. It is important that the screen cloth be integrally fused to the
 key over some distance to achieve maximum strength.
 The screen is self storing within the frame of the window by virtue of
 accumulating on a roller similar to the operation of a roller blind. It is
 payed out by pulling on a full length handle which is guided by a rail at
 each end. The window frame includes a guide channel for the screen which
 tracks and covers the free edges of the screen. The handle provided with
 the screen engages the adjacent sash frame section with latch detents
 provided which will maintain the screen under tension from the dispensing
 drum and covers the opening created when the sash is opened by sliding in
 the track wrinkle free and bug tight.
 According to yet another aspect of the invention there is provided a
 closure assembly comprising a retractable screen disposed within a framing
 portion of the assembly, said framing portion providing a pocket within
 which the screen is contained in use, said pocket being bound by at least
 two sides of said framing portion thereby forming said pocket, said pocket
 being closed by a separate cover closing said framing portion, being
 positioned in said pocket prior to the cover closing the pocket is
 installed preferably by clipping detents provided with said cover in a
 channel provided with at least one of the sides of said framing portion
 providing the pocket, the screen accumulating on and paying out from a
 spring biased roll disposed within said frame portion, the screen being
 retractable for egress or cleaning purposes, and available as desired by
 providing a detent on the opposite frame portion engageable with the
 screen when in its operable position.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
 Referring now to FIG. 1, 2 through 2b there is illustrated a tilt and slide
 window assembly. Therefore the assembly 5 includes an outer frame portion
 10 which is normally hung within an opening established in a building (not
 shown). Normally nailing flanges are provided for this purpose attached to
 the outer frame 10. The frame 10 includes top portions 17 and bottom
 portions 16 having tracks disposed therein, as best seen in relation to
 FIG. 2. Within the tracks are contained a pivot assembly which will be
 hereinafter described. Primarily the pivot assembly includes a pinion 35
 and carriers 38 and 37 interconnected by interconnecting portions 32 and
 31 making up an interconnecting member 30. The pinions move as the window
 20 is slide in the track portion by the movement of the pinion 35 with
 respect to the rack 18 or 19 respectively. In this way the pinions 35
 being interconnected remain parallel at all times in their motion along
 the track within which the rack 19 or 18 is disposed. The hardware is
 shown in normal view while the window assembly is shown in dotted lines,
 to illustrate the essence of the assembly.
 Referring now to FIG. 2 there is illustrated the window of FIG. 1, wherein
 a window 20 and 40 is slidable within a track 15 and 17 upon a shoe 39.
 The lower shoe 39 also is connected to a secondary show 39a for carrying
 the window which includes rollers 39b, 39a1 and 39b2 on the bottoms
 thereof respectively for ease of movement within track 17. The pinion 35
 rests within the shoe 39 as will be described hereinafter. The arrangement
 of the interconnecting portion 30 will also be described hereinafter.
 Window 40 therefore has its own interconnected system as can be best seen
 in relation to FIGS. 2a and 2b.
 Referring now to FIG. 2a there is illustrated the sash elements 20 and 40
 and the rack portions 19 and 19a which accommodate the motion of the
 pinion 35 along a full length of the track, as best in FIG. 2b.
 Referring to FIGS. 1, 2 to 2b clearly the track portion 17 and 15 cooperate
 with the rack portions 19 and 19a to provide for the pinion 35 and its
 motion when the window remain slidable within the track. By
 interconnecting the two pinion portions and hence the two pivot shoes, by
 interconnecting means 30, the shoes remain in a substantially parallel
 position in relation to one another at all times. This overcomes the
 problem described in the background of the prior art. By remaining
 parallel it is almost impossible for the window therefore to come out of
 the track when the window is pivoted to be cleaned and therefore is no
 longer necessary to provide braking portions as in previously described
 inventions of Canadian Thermo Windows, as referred to in the background of
 the invention.
 Referring to FIGS. 1A and 1B there is illustrated a casement style window
 having similar components to that found in relation to FIG. 1 with the
 exception of only one sash being provided being secured on shaft assembly
 30 including portions 31 and 32. A link L is provided secured proximate
 ends L1 adjacent the center of the sash 21 proximate the bottom thereof
 and adjacent the track 18 adjacent the opening end of the window sash 21.
 By positioning the sash in this manner a full range of pivoting motion is
 available. If the link end L1 is removable than the window sash may be
 moved totally to the opposite end remote the pivoting end 21b on shoe 39.
 As with the case of the tilt and slide window a shoe 39 containing a
 pinion is provided. The pinion is connected to the shaft 30 and engages
 the rack 18 as it moves along the window sill and header in parallel
 arrangement between the upper and lower pivots maintained in parallel by
 the shaft 30. In this manner the casement style window may be pivoted as
 normal to an open position, and the pivoting end may be moved to the other
 end of the window frame away from side 21b to allow ease of cleaning.
 supplying the hardware described without a casement sash the casement
 window may be assembled without the need for expensive pivots and linkages
 and without a great deal of assembly labour. As best seen in FIG. 1D for
 the casement style window in particular a rollaway screen S may be
 provided which is housed in jamb 17a as illustrated. The screen S pulls
 across to engage detent D1 with detent D2 in jamb 16a, whereat it may be
 locked. This allows a user to clean the glass of sash 21 on the inside
 without removing the screen.
 Referring to FIG. 1C there is illustrated a tilt and slide type window
 similar to FIG. 1 with the exception that when closed the window sashes
 will be oriented in a straight parallel line with one another. In order
 for this to happen the rack provided 18 includes a portion 18a made from
 fiber filled plastic or the like and joined at seam 18c to an aluminum
 track 18b. The sash 21 is therefore moveable as previously described on
 carrier 39 and rollers 39a as urged by pinion 35 until the pinion reaches
 the curved portion of the track 18 a wherein the assembly 30 will move
 along the curve to the terminus of the track 18t. The sash portion 21a
 will then lock in behind the edge of the sash contained in track 18' and
 be lockable at that position. The sash 21' (not shown) resides on assembly
 30' in track 18'. As pinion 35' moves within the limits of rack 18' the
 sash 21 cannot adopt a parallel position unless sash 21' is in its fully
 closed position. Only then can the end 21a adopt its fully closed position
 butting up against the sash 21' at the end opposite the carrier assembly
 30 and 39.
 Referring to FIG. 3 there is illustrated a double hung window assembly
 embodying the preferred embodiment of the hardware making up the invention
 substantially equal to that which is disclosed in FIG. 1, with the
 exception that a coil spring 31a is provided around the connector portion
 31 of the interconnecting portion 30. By providing the interconnecting
 portion 31 with a spring 31a it will no longer be necessary in a double
 hung window assembly to provide a sash balance, as the spring 31a is
 pre-loaded to provide the necessary tension, much the same as a spring
 which is used in a garage door. In this example as a garage door goes up
 and down the spring is compressed and tensioned depending on the motion of
 the door and therefore provides for the return motion of the window
 assembly. Within the window assembly sashes 20 and 40 shown in ghost line
 are moveable with hardware substantially made up of a pivot or pinion 35
 moving on a rack 18 and 19 respectively and being interconnected by the
 interconnecting portion 30.
 Referring to FIGS. 4 and 5 there is illustrated the hardware which is
 installed within the double hung window assembly of FIG. 3. Pinions 35
 therefore are provided, which seat within the carriers or shoes 39. The
 pinion includes a shaped opening 35a which is compatible with the bar
 stock 34c and 32a proximate the ends thereof. The pinion therefore will
 ride on the rack 18 and 19 within shoe 39. Opposed supplementary portion
 37 is provided to oppose the shoe 39 as it rides in the track. Therefore,
 referring to FIG. 2b the portion 37 and 38 may be readily seen. A combined
 ratchet and pawl assembly is provided with portion 37 or at least
 connected therewith. The pawl assembly 37c is resilient biased through the
 opening 37d of member 37 so as to release the ratchet 34b of shaft 34 when
 the window is to be removed from the assembly. Proximate the other end of
 the hardware there is provided a backing member 38 in a unique shaft
 extension 33 which includes portions 33b, 33d, 33c and 33a wherein the
 shaft end 32a extends through. A locking nut 33e is provided to lock the
 entire hardware together and to allow for ease of separation thereof. An
 adjustable connector 31b is provided proximate the other end which allows
 for adjustment with regard to the length of section 32 of the shaft so as
 to allow variation in the sizes of the assembly supported. Portions 31,
 31b, 32, and 33 makeup the shaft assembly which allows for ease of
 installation, adjustment, alignment and removal of the sash assembly. Also
 the hardware therefore described provides for the interconnection of the
 pivot shoes proximate their sides and provides for parallel motion of the
 pivot shoes at all times thereby illuminating the need to lock the pivot
 shoes in the track assembly.
 Referring to FIG. 6 there is a description of a different shoe construction
 which is useful when a window is removed, since the carrier will be locked
 in position when the window is removed for maintenance or for cleaning.
 Therefore the shoe 39 includes a spring b and a recess therefor and a
 supplementary portion 39d and a finger a therefore wherein teeth c are
 provided on supplementary portion 39d which teeth are biased by spring b
 against the pinion 35 to thereby lock against pinion 35 and prevent the
 motion of the carrier when the window is removed. A sloped wall d is
 provided with the carrier supplementary portion 39d which is engaged by a
 separate simple latching and unlatching mechanism which thereby releases
 the supplementary portion away from the pinion or toward the pinion when
 the latch is opened. Therefore when the latch engages the supplementary
 portion d it will drive the supplementary portion 39d away from the pinion
 35 thereby allowing free motion of the pinion in normal circumstances.
 However when the latch is disengaged the portion 39d will be free to move
 as biased by the spring b toward locking the pinion 35 via the teeth c of
 the supplementary portion 39d. The alternate shoe of FIG. 6 and 7 has an
 opening 39a within which the extension 35a passes to engage the connecting
 member 30 as previously described. The rollers 39b engage with the notches
 as shown to improve the motion of the carrier in the track.
 Referring now to FIG. 8, 9 and 10 there is illustrated an alternative
 embodiment of the invention to maintain the carrier pivots 61, 65, 60 and
 81 in substantially parallel alignment and thereby eliminate the need for
 braking mechanisms. FIG. 8 is illustrated as a tilt and slide frame in
 ghost line with the window 70 also shown in ghost line having pivot 75 and
 71. The pivots 75 and 71 engage with openings within the shoe 61 and 65 in
 the manner which is known. These pivot pins 75 and 71 may be removed from
 these shoes merely by retracting them from their locked positions. The
 sash 70 therefore is moved on the carrier 81, 82 and 83 proximate the
 bottom thereof in the track portions as shown and within carrier 60 on the
 top thereof. A similar sash arrangement would be arranged for the other
 shoes as well but for simplicity sake this is not illustrated. The
 important aspect is that a cable 91 is connected to the carrier 60 and the
 carrier assembly 81, 82 and 83 substantially as shown in FIG. 9, so that
 when the window moves toward the right hand side of the drawing that both
 carriers will move an equal amount by the movement of the cable
 maintaining the pivots 75 and 71 within the shoes 60 and 81 substantially
 parallel at all times. Similarly, a cable 90 is provided which moves in
 conjunction with the carrier 63, 62 and 61 and the shoe 65, as best seen
 in FIG. 9, so that as the shoe 65 is moved in a direction D2 that the
 carrier 61, 62 and 63 will also be moved in the direction D2. FIG. 9
 therefore shows the path of the cable connecting the carrier described
 above.
 In order to allow for the movement of the cable the unique pulley
 arrangement is illustrated in FIG. 10 wherein the cable will travel
 through the respective channels 107, 108 and 105a within the wheel 105, or
 through 106, 104, 105a within the opposite wheel or pulley 105. Assembly
 101 is therefore provided which is affixed within the window frame via
 opening 101a and a fastener, not shown, which assembly allows for the
 movement of the cable and hence the carriers in a manner as best seen in
 FIG. 9.
 Referring now to FIGS. 11 and 12 there is provided a locking mechanism for
 the shaft 30 which may be used with any lousier assembly. A handle
 assembly H is provided including a stationary portion H2 fixed to the sash
 21 and a moveable spring biased portion H1 biased to a continual locked
 position via spring leaf S2. The handle portion H1 includes a pivot H4 and
 detent portions H5 and H6. Normally the spring S2 will cause the handle
 portion, H1 to remain in engagement at detents H5 and H6 with gear portion
 or serrations 30Z of the shaft 30. Therefore the window or door is locked
 in that position and cannot be pivoted or slid. When a user engages the
 handle H1 and presses it towards H2 the detents H5 and H6 release from the
 gears 30Z and hence the window or door may be repositioned as desired. At
 that repositioned location when the user releases the handles the window
 or door will again become locked.
 Referring now to FIGS. 13, 13a, 13b, 13c and FIG. 18, there is illustrated
 a track portion 18 and 19 which is to be installed within, as shown in
 FIG. 18, the sill and header 220 of a frame assembly also including
 upwardly extending jamb portions 220a. The track portions 18 and 19
 therefore are installed within the profiles as seen in FIGS. 2b and 18 by
 the provision of a locking block assembly 200 which includes an adjuster
 nut 210 which engages the rack portion 18x of the rack 18a of the track
 profile 18 as best seen in FIG. 13a. The profile therefore includes the
 rack 18a, a riding portion for the rollers 18e which will be explained
 hereinafter, and a recess 18d wherein a carrier as best seen in relation
 to FIG. 14 rides with the exception of the rollers. The track 18 therefore
 must be locked in position in the sash 220, and this is affected by the
 locking block 200 and the moveable nut 210. As best seen in FIG. 13c, the
 track is inserted into the sill profile as shown so that the carrier may
 ride on the track. The assembly of FIG. 17 for the sash is therefore
 engaged with the carrier. The block 200 therefore is screwed down through
 the profile 15 into the wooden frame member not shown via opening 15c in
 the profile and 204 in the block 200. Two fasteners 205 therefore are
 provided, and as shown in FIG. 13, they are inclined at an angle to the
 vertical in order to allow for the provision of an adjuster 206 which is
 accessible through the opening 207 in the block 200 wherein a cap screw
 having a head 206a having an allen key type access slot is provided. The
 threading 207b extends down to the end 207a proximate the nut 210.
 As best seen in FIG. 13, the lock block 200 and the locking nut 210 have a
 profile substantially as shown with a triangular shaped cut out provided
 adjacent the top thereof and wherein abutting portions 201 and 203 are
 provided to engage with the flanges 15b and 15a of the profile 15 of the
 sill portion 220. The triangular cut-out portion includes an upwardly
 vertical face 202a, and bottom 202. Similarly the nut has a shoulder 211
 provided and a substantially triangular shaped cut out 212 and an upwardly
 extending face 212a for engaging with the sill profile 15 similar to that
 which is illustrated and described in relation to FIG. 13. The rotation
 therefore of the cap screw 206 results in the movement of the nut 210 in
 relation to the block 200 which is fastened in position. The adjustment
 therefore of the screw allows for the thread to engage a threaded opening
 not shown in the nut 210 so that the rack portions 213a provide engagement
 with the rack 18a of the track portion 18 and will allow for fine
 adjustment in the positioning of the track 18 and the locking in position
 of the track. It has been found sufficient that by providing the block and
 the adjustment of the nut, it will sufficiently position and lock the
 track in position and allow for the adjustment of the track which will
 then further allow for the adjustment of the pivots as best seen in FIGS.
 1, 1a, 1b, 1c, FIG. 2, FIG. 3 and FIG. 17 so that the parallelism is not
 lost, and if fine adjustments once installed are required to the window
 sash to maintain the parallelism of the system, this is very easy to do.
 Should the system go out of parallel and require fine adjustment to
 restore the parallelism, a mere rotation of the head 207 is required for
 both the sill and headers 220 so that the system is squared.
 The notch portion defined by the faces 202a and 202 have a unique purpose
 in that the latch portion 251 as well as 250, as best seen in FIG. 17,
 will engage with the face 202a and provide a lock detent for the lock 251.
 This adds reinforcement to the lock provided in that should the triangular
 shaped detent of the block not be provided, then the lock 251 would engage
 flange 15a and in time would wear out that flange in that particular
 locking position. The nut 210 has a similar function so that either the
 nut or the block can function as the detent for the latch. Specifically in
 FIG. 18, the screw 206 is shown being engageable from the nut toward the
 block, and in fact it is accessible in either direction as shown in FIG.
 13 and FIG. 18 without changing the advantages of the system. For access
 purposes, depending on the installation and the type of window, it may be
 easier to adjust as shown in FIG. 18 as opposed to FIG. 13. Preferably the
 block is made from fiber-filled nylon. Alternatively, the block may be
 made from aluminum. The nut may be made from fiber-filled nylon as well.
 Referring to FIGS. 14, 14a and 18, there is illustrated a carrier 39x which
 includes a pivot portion 35 for engaging with the shaft portion 32 and 34c
 of the pivot assembly and for carrying that shaft assembly and the
 pivoting end of the sash in the track 18 and 19 respectively of FIG. 18.
 The carrier includes a portion 39y provided therewith to carry the rollers
 39b therein. This is very similar to the carrier illustrated and described
 in the previous descriptions and more specifically in relation to FIG. 1a
 and 1b, with the exception that the details of the carrier were not shown
 at that time in relation to the thrust wheel 35c provided on the bottom.
 The carrier, as best seen in FIG. 1a therefore rides on the rollers on the
 track profile seen in FIG. 13A on the surfaces 18e for the roller wheels
 39b and in the notch or cut-out recess 18d for the side portions adjacent
 the roller 39b at 39z. The pinion portion 35 therefore has an opening 35b
 for receiving the shaft 32 which extends toward the bottom of the opening
 35d and which opening 35b as best seen in FIG. 14 is compatible with the
 shape of the shaft 32. The outer surface 35a of the opening 35b is
 compatibly shaped with the opening in the carrier so that the opening 35b
 may be accessible to the shaft 32. At the bottom of the pinion portion 35
 is a thrust wheel carrying portion 35e which carries the thrust wheel 35c.
 The thrust wheel 35c therefore rides in between the shoulders 18c and 18b
 on the surface 18d of the track profile 18. The thrust wheel is provided
 to accommodate any wind load which may be placed on the system when the
 window is opened. Further, in the normal meshing of gears with a rack,
 there is a thrusting force created as the pinion 35 moves on the rack 18x.
 Therefore, the thrusting wheel will engage from time to time the shoulders
 or the surfaces defined by the shoulders 18c and 18b so as to maintain the
 parallelism and the accuracy of the installation of the window system. A
 pinion gear 35a is therefore provided between the thrust wheel 35c and the
 pivot receiving opening 35b which operates substantially as described in
 relation to FIG. 1A and FIG. 1 in that as the window rotates the pivot
 rotates causing the gear 35a to rotate and move on the track. This is
 particularly advantageous when the pivot assembly is provided on a
 casement window as best seen in relation to FIG. 1A in that it is
 desirable to have the window move away from a pocket provided in the
 window jamb as best seen in relation to FIG. 1E so that the sash profile
 will not engage the jamb profile but will readily clear the jamb profile
 as the window is opened. For example, as best seen in FIG. 1D, proximate
 the top thereof, it may be readily seen that a pocket is provided in the
 jamb profile so that the pivot assembly 30 is accommodated at that end of
 the window. However, a flange portion unlabelled engages the sash cover
 portion so that within the jamb J1 there is a pocket J2 provided which
 improves the seal of the window in that the cover portion SC extends into
 the pocket J2 when the sash is closed. However, when the sash is pivoted
 as in the case with the casement window of FIG. 1C, the pinion gear when
 pivoted will move the sash and the sash cover SC out of the pocket J2 away
 from the jamb J1 and provide suitable clearance so that the sash cover SC
 will not engage with the jamb portion J3 which is a flange and therefore
 will clear easily the pocket and all its enabling portions. When the
 casement window is closed, the opposite happens and the sash cover SC will
 engage the pocket J2 and be moved in position with the pivoting of the
 window to the closed position.
 The rollers 39b therefore provide a smooth motion of the closure system in
 relation to the track which would not be present if the rollers were not
 provided since the track is made from aluminum. The rollers are not
 absolutely essential in every embodiment, however, it is preferred.
 Referring now to FIG. 15, there is illustrated two sashes side by side
 shown in end view. The sashes are made substantially as constructed in
 relation to FIG. 17 wherein the sash 220 is defined by a central I-shaped
 portion 227 having an opening therein and two side abutting portions 225
 and 226. A pocket therefore for receiving the glass G is defined at 222.
 Fin seal portions 221 are therefore provided for abutting the glass G
 which contains the normal known seal portion SX. The window sash profiles
 also include flange portions 224 proximate the opening opposite the glass
 G. Within that opening there is provided in use a closed cell caulking
 foam which is compressible at portion 240. This portion extends totally
 along the sash profile within the opening as shown with the exception of
 the portion adjacent the pivoting assembly. A cover portion therefore is
 provided at 230 which engages the tab portions 224 proximate each side of
 the sash profile. This cover portion when inserted is flexed downwardly as
 the closed cell foam 240 is compressed as best seen in FIG. 15a so that
 the flange portions of the cover at 230a engage with the flange portion of
 the sash at 224 to provide a compressed seal for the track cover 230. The
 track cover is defined as a track cover although it does occupy the sash
 as a component thereof in that as the sash is closed over the opening
 defined between the flange portion 16a and 16b as best seen in FIG. 15a,
 the snap cover portion will extend down into and engage with the flanges
 16a and 16b, thus covering the track and snapping into position each time
 the sash is opened and closed. The typical seals BX and BY are provided as
 is known in the art.
 Alternatively, as best seen in FIG. 1D, the sash covers may include
 alternative embodiments shown proximate the jamb portions 16a and 17a of
 the window assembly. Alternatively, a cover portion may be provided over
 the track portion 15 of sill portion 220 and header portion 220 of FIG. 18
 that engages with the sash profile in a similar way to that of the track
 cover of FIG. 15a with the exception that the track cover only extends
 over the second half of the track, that is to say the second half not
 carrying the window. For example as shown in FIG. 2, the wheel portion 39a
 may be eliminated and the track cover may extend along the track portion
 opposite the pivot assembly so that the sash may slide on the track cover
 and be assisted to be supported by that track cover only in the second
 half of the track profile thereby eliminating the second carrier of FIG.
 2. The track cover therefore in FIG. 2 as an example would extend from the
 carrier 39a toward the left side of the page to allow the pivot assembly
 35 to move to approximately the position of the present carrier 39a
 wherein it would engage the track cover. In the movement of the carrier 35
 to that position, the other end of the window would already be supported
 by the track cover. This installation therefore would eliminate the
 carrier 39a.
 Referring now to FIG. 16B, there is provided locking detents 250 and 251
 which engage with the locking detent portions 202 and 212 of the lock and
 nut portions 200 and 210. These locking portions 250 therefore and 251 are
 operated by a handle 260 as best seen in FIG. 16A which is rotatable to
 cause the motion of the rack portion 265 and the detent 250 into and out
 of the locking abutment provided with the lock block and the lock nut 200
 and 210 respectively. In FIGS. 16, 16A and 16B, the installation is
 provided for a casement window assembly. In the United States Patent
 Application described in the Summary of the Invention which was
 incorporated by reference, there is no provision of a casement-style
 window lock. Nor was there the provision of a lock block or nut detents
 210 and 200 respectively. The handle therefore 260 is rotated by the user
 which causes the movement of the corresponding pinion gear 261, the
 rotation of the pinion gear 261 affects the movement of the rack 265, and
 the latch engaging portion 250a and 251a carried within the housings 255
 and 254 respectively as best seen in relation to FIG. 17. The rotation of
 the pinion will therefore also cause the motion of the rack portion 266
 sufficiently as provided by the opening 266a of said rack portion to allow
 for engagement of said rack portion with said rack portion 265 with the
 bottom portion affecting the latching and unlatching of detent 251.
 Intermediate the two latching portions for the casement window is provided
 a second pinion 267 which is rotated effectively by the movement of the
 rack portion 266. Rotation of the pinion 267 causes rotation of the pinion
 sector 268 which is engaged with the locking detent 269 for the latch
 plate 270 and the detent 271 thereof. This latch plate is typical for
 casement windows as is the movement of the lock 269, i.e. the rotation
 thereof. However, with the central locking system provided with this
 invention, it is the one handle operation of both the detents 250 and 251
 and the casement window lock 269 which is in combination the essence of
 the central locking system. Alternatively, the casement window portion may
 be left out and the essence of the locking system therefore includes the
 locking block in the track which provides a detent for the locks 250 and
 251 respectively.
 As best seen in relation to FIG. 17, there is provided a cover C(x) which
 hooks into the sash profile similarly to the cover 230 previously
 described in relation to FIGS. 15 and 15A through which the handle portion
 260 extends. Therefore, the latch assembly is contained within the sash
 profile, and the only portion extending outside of the sash profile is the
 handle portion. This handle portion is considerably smaller than the
 normal handle portion provided with a casement window which is typically
 rotary, and there is a tremendous elimination of components for a
 casement-type window. In fact, this will be described hereinafter.
 Referring to FIG. 17, there is shown an exploded perspective view of the
 window assembly which will fit into the track profile similar to FIG. 18,
 but more specifically which may be designed for a casement window. The
 sashes 220 are provided with an opening 227 wherein a corner connector 280
 is provided which extends into the opening 227 proximate all four corners
 and eliminates the necessity for welding. Clip portions 281 bite into the
 vinyl and are tapered in a direction so as to prevent the removal of the
 corner connectors once inserted within opening 227. This snap lock feature
 therefore provides for the installation of the corner connectors and the
 quick fastening of the sash profile around the glass G. The track covers
 230 are therefore provided and snapped into position once the closed cell
 foam, best seen in FIG. 15a at 240, is inserted within the opening of the
 sash profile. The hardware including the carriers, best seen in FIG. 18,
 which are then assembled within the opening opposite the glass of the sash
 proximate each jamb portion in use. The hardware therefore including the
 top and bottom track engaging portion 39x and 37x, the shaft 32, the
 connector 31bx, the other shaft 31, and the small shaft 34c are provided
 proximate the pivoting end of the window assembly within the sash profile
 enclosed by a cover similar to that of cover CX. The central lock as
 described in relation to FIGS. 16, 16A and 16B is therefore inserted
 within the other opening of the sash profile and assembled and covered by
 the cover CX. The window sash is now available for installation within the
 frame assembly of FIG. 18 once the carrier portions 39x are engaged with
 the respective shafts 32 and 34c. The block portions 200 are therefore
 locked in position once the track is installed in the frame, and the nut
 portions are adjusted to allow for the parallelism of the carriers 39x
 within the tracks to ensure the parallelism of the sash so that it rides
 well within the track portions. The window is therefore assembled.
 For a casement window, all of the prior art levers and latch mechanisms are
 substantially eliminated. This means a great deal to window manufacture in
 that there are a considerable number of screws and fasteners to hold down
 the prior art lever linkages of the prior art systems. In the present
 invention, only the latch block fasteners are provided. The rest of the
 window assembly merely snaps together with a friction fit of the sash
 profiles, the sash profile covers and the frames. A minimum of assembly
 labour is therefore required with the installation of this window
 assembly. In one particular situation where an old style double-hung
 window is installed within an opening, it may be conveniently removed by
 an installer and the present invention may be installed in any of its
 embodiments including a casement window.
 This is heretofore unknown in that a casement window occupies a certain
 standard space in the industry, and because of the linkage systems and the
 known systems, it is not possible to provide a larger window. With the
 present invention, a larger casement window may be provided which is
 easily installed with the minimum amount of labour and assembly time
 required. Should the window now be mis-alligned for any reason, it may be
 easily adjusted by the rotation of the screw 206 provided. A sophisticated
 user therefore could easily adjust this once instructed over the phone by
 an installer, or alternatively the installer may return for a quick
 adjustment at any time. Also, the window assembly is less likely to go out
 of adjustment because of the great care taken in the development of the
 precision of the assembly.
 A method therefore of assembling the window may be considered as described
 in the above-mentioned description wherein, firstly the sash components
 are assembled by the quick fastening feature of the corner locking
 portions which are inserted within the opening of the sash profiles
 provided and provide one-way friction fit. The closed cell caulking is
 therefore inserted within the top and bottom of the sash assembled and
 these portions are covered by the track covers by the compression of the
 closed cell foam and the engagement of the tabs of the track cover with
 the tabs of the sash profile. The hardware is then installed along the
 vertical portions of the sash within the openings thereof opposite the
 glass which is then covered by a sash cover portion provided. The hardware
 located proximate the pivoting end is therefore installed on the carrier
 portions and inserted within the track portion within the sill and header,
 for example of a window assembly. The window is therefore closed in
 position with the sash covers or track covers located proximate the sill
 and header snapping into the frame and closing any path for air to enter
 the window and pass the primary seals provided as best seen in relation to
 the FIG. 15A. The track covers also provide blockage of light, air and the
 friction fit of the sash into the track portions. By providing a track
 cover along the track remote the pivoting end of the window, this track
 cover may be used as support as well for the window assembly.
 In another embodiment not shown, a double casement window is provided which
 is provided in a straight-line window, that is to say a frame is provided
 wherein a central mullion is disposed. A central mullion separates two
 casement windows, one opening as a mirror image of the other and
 containing all of the elements described above in relation to the pivot
 assembly and the central locking system and track system.
 Referring now to FIGS. 1 and 1D, there is illustrated a retractable screen
 contained within the opening of the jamb within a framing section for a
 window assembly having a header 17, a sill 15, and two side jambs 5 and
 10. The side jambs 5 and 10 are somewhat identical with the exception of
 the details herein provided. One of said jambs 5 or 10, or for that matter
 in alternative embodiments sill 15 and or header 17 may contain a
 retractable screen stored on a tube. This may be seen in relation to FIG.
 21 which is comparable to FIG. 1D. The screen assembly 300 includes a tube
 305 having a pair of ridges 305a contained within the hollow 300a thereof,
 said hollow 300a for receiving a spring 301 being a torsion spring having
 two ends 301a and 301b. Said ends 301b and 301a for anchoring into the
 assembly and for ensuring that the spring stays in constant torsion
 loading. A pin assembly 310 and 311 are disposed proximate each end of
 said tube 305. The pin 310 includes an opening 310a for receiving the end
 301a of said torsion spring 301. Likewise, the insert 302 includes an
 opening 302a for receipt of the end 301b of the torsion spring 301. The
 insert 302 engages the pin portion 311. The pin portion 310 engages the
 bushing portion 312. The pin portions 310b and 311b are inserted within
 mounting brackets M1 and M2 for mounting in the hollow of the jamb
 section. The rib portions 305a and 305b engage with corresponding rib
 portions provided with the pin section 311 and the bushing 312 to prevent
 rotation of the pins with respect to the tube unless the tube itself is
 rotated. With respect to the brackets M1 and M2, spacers S1 may be
 provided to orient and correctly space the screen assembly in the jamb
 portion or pocket within which the spring assembly retracts. The screen S
 is manufactured from a flexible material and has disposed proximate the
 ends thereof screen welding material or adhesive to adhere to the roller
 305 and to the joint provided with respect to the handle portion 320
 illustrated best in relation to FIG. 30. The other end of the screen is
 inserted within the alligator-type locking jaw of FIG. 30 between elements
 320a and 320b to capture the screen portion S2 therein. The screen portion
 320 also includes a seal portion 321 which will be described hereinafter
 which locks and is retained within a channel 322 provided on one edge of
 the aluminum handle portion. Openings 325 and.326 are provided with the
 handle assembly 320 so as to retain the guide portions 330 therein. The
 guide portions 330 are contained within the openings 325 and 326 of the
 handle portion 320 so as to guide the screen assembly as it pays out from
 the jamb in a track portion provided with the header and sill portion of
 the framing sections. A latch portion and a latching plate 350 are shown
 with the assembly. The latching plate 350 is affixed to the opposite jamb
 for engaging with the latching member 340 wherein the detents mate and
 cooperate to retain the screen in its closed position. A seal 321 is
 contained within a seal receiving channel 320a to seal against the
 opposite jamb and prevent bugs from entering the living space. The guide
 members 330 include a leg 330a which are compatibly shaped with the
 opening 325 within the handle portion 320. The handle portion 320 is
 extruded from aluminum to form all of the details thereof. The bracket
 portions M1 and M2 are mounted within a pocket P as seen in FIG. 1
 containing the roll 305. A cover plate 350 therefore is provided which
 snaps into place via the leg portion 350a being inserted within an opening
 provided adjacent the jamb pocket. The jamb pocket therefore is defined by
 three sides 10a, 10b and 10c against which the closure member buts up
 against and seals. This will be described hereinafter in relation to FIG.
 21. The screen assembly, and particularly the brackets of FIG. 19 are
 therefore installed within the frame pocket P of FIG. 21 as being keyed
 into said frame pocket and engaged with the rear wall 10c of the jamb 10.
 The roller cassette 300 is then installed within the pocket P being
 pre-tensioned and wherein the pin portions 311b and 310b are inserted
 within openings 01 and 02 within said brackets, and the adjustment is
 provided via the bottom bracket M2 including the spacer S1 with the
 supplemental adjustment M3 to ensure that the roller is properly placed in
 the system. The tension may be adjusted if required by removing the
 snap-on cover portion 350 at any time. The handle portion 320 is
 specifically sized to be received within the opening defined between the
 cover 350 and the adjacent jamb portion 10b.
 Referring now to FIG. 20, there is illustrated a similar cassette assembly
 for a retractable screen to that of FIG. 19 with the exception of the
 mounting brackets and the particulars of the screen. All other elements
 are identical or substantially identical. The brackets 360 therefore
 engage the generally T-shaped guide 350b of the snap-on cover 350
 proximate the generally T-shaped channels 360b disposed therewith as best
 seen in relation to FIG. 28b. Only one of the T-shaped channels or pockets
 360b therefore engage the T-shaped guide 350b which allows for a certain
 amount of adjustability in relation to the positioning and pre-tensioning
 of the screen assembly 300. The cover is therefore utilized as a chassis
 to hold the screen brackets and hence the screen cassette. The edges of
 the screen S1 and S2 are therefore provided with adhesive in the form of a
 tape system to mount the edge S1 onto the hollow tube 305 and to mount the
 edge S2 into the screen-receiving pocket of the handle portion 320 at
 320a. The glides 330 at the end of the handle portion 320 telescope to
 accept manufacturing installation variations prior to snapping them into
 the flexible frame track provided thereby providing a seal for the screen
 pocket and guide rails.
 Referring now to FIGS. 21, 22 and 23, the screen embodiments shown in FIGS.
 19 and 20 may be utilized with a screen assembly as best seen in relation
 to FIGS. 22 and 23 which include generally T-shaped key portions S1 and S2
 which are generally T-shaped and which engage with generally T-shaped
 openings 305x and 350x within the tube 305 and within the handle 350 in
 one embodiment of the invention thereof. By providing such a keyed
 relationship between the handle and the screen, screen replacement becomes
 very easy eliminating the need for adhesives and the general cutting of
 screen sections. The screen width indicated as Z therefore is a constant
 for all screens. Therefore, one continuous screen may be manufactured
 having the keyed portions located and anchored to the ends thereof as one
 continuous roll of screen having a predetermined size or width Z which may
 be cut to the desired length as the only variable dimension when making
 the screen assemblies of FIGS. 19 and 20 and/or replacing the broken
 screen which might result under normal wear of FIGS. 19 and 20.
 Referring now to FIGS. 1D and 21, the screen assembly 310 included in the
 jamb does not compromise the typical framing size and standards nor
 interfere with the window function. Clearly the closure member or window
 21 may be swung outwardly away from the jamb and be sealed against the
 seal 21a in a closed position. Alternatively, when the window is a tilt
 and slide, the window 21 may be slid away from the jamb 10. When the
 window is in the closed position, there is no need for the screen to be
 utilized. Therefore, the screen assembly 300 remains hidden within the
 jamb portion 10 of the window assembly. An esthetically pleasing result
 therefore is pleasant without the unsightly screen being present and
 without the unsightly lines of an additional housing added onto the jamb
 section 10. The cover portion 350 including the guide 350b may equally be
 utilized on the side 10b of the jamb 10. That is to say it is not
 necessary to have the cover 350 close the three-sided jamb sections 10a,
 10b and 10c from the front face thereof as shown in FIG. 21. Equally, the
 side face 10b and in one embodiment a preferred approach will be utilized
 for the cover facing 350 wherein the cover therefore is not observable at
 the front of the jamb 10 but only at the side making a much more
 esthetically pleasing installation.
 Referring to FIGS. 24, 25A, 25B, 26A, 26B, 27A and 27B, there is
 illustrated the tube of FIG. 24 having a predetermined diameter and having
 rib portions 305a provided therewith which engage with the compatible
 detents provided with the pin assembly at 311a which prevents the rotation
 of the pins with respect to the hollow tube 305. In this way, the torsion
 spring 301 and its effort can not slip in relation to the pins 311b and
 310b. Similarly, the pin assembly embodying 302 as rib portions 302b to
 prevent rotation thereof with respect to the tube portion 305 when engaged
 with the pin assembly portion 311. An opening 302a is provided to engage
 the spring end 301b and help in establishing the loading and the constant
 torsion of the assembly. Similarly, the pin portion 310 has an opening
 310a for engagement with the end of the spring 301a prior to insertion
 within the bushing 312 which also includes rib portions 312a.
 Referring now to FIG. 28A, there is illustrated the bracket of FIG. 20
 which bracket 360 includes a pin-receiving opening and a pair of generally
 T-shaped openings 360b for receiving the guide portion 350b of the
 flexible cover 350. Only one of the openings 360b is utilized depending on
 whether the bracket is being utilized as a top or as a bottom bracket.
 Clearly, the bracket has adjustability in that it may slide along the
 guide 350b in the flexible cover to the predetermined position to turn by
 the distance separating the pins 311b and 310b in the screen assembly. The
 brackets then may be fixed in position utilizing glue or the like and may
 be fastened to the opposite wall 10c of the jamb 10 of FIG. 21 using
 conventional methods. It is recommended that the fastening be a removable
 fastener type allowing for repair of the screen assembly.
 Referring now to FIGS. 29A and 29C, there is illustrated the glide portion
 330 shown in FIGS. 19 and 20 which glide portion has a generally T-shaped
 guide-receiving portion 330b to retain the channel. The member 330a
 therefore is provided to be inserted within the opening 325 of the handle
 portion 320 to seal the entire assembly. Said foot 330a can be moved in
 and out of the opening 325 to allow for adjustment as is required.
 Referring now to FIG. 30 in relation to FIGS. 19 and 20, the handle portion
 320 is therefore shown including alligator jaw-like portions 320a and 320b
 as seen in FIG. 20 for capturing the edge S2 of the screen S when the
 portion 320b is crimped and moved toward the edge of portion 320a
 capturing the screen therebetween via serrated edges 320i of the side 320b
 of the joint. An opening 325 is provided for receipt of the guide portion
 330. The handle portion 320i allows a user to remove the screen as
 required.
 Referring now to FIGS. 31a, 31b, 32a and 32b, there is illustrating the
 latching portions of the screen assembly comprising items 340 and 350. The
 portion 340 is mounted on the handle portion 320 and is clipped in
 position via a hook portion 340b to be retained within a slot 320i and 340
 as best seen in FIG. 19. This latching portion engages the latching plate
 of FIGS. 32A and 32B which is mounted via mounting openings 350b of the
 latching plate 350. The opposite jamb is utilized to mount the latching
 plate 350 so that as the screen moves across the opening framed by the
 frame assembly, the detent or latch portion 340a engages the latch portion
 350a of the latching plate to retain the screen in its operative position.
 This can be released of course by disengaging the latching portions 340a
 and 350a respectively wherein the screen may be retracted within the
 opening in the jamb 10 of the framing section.
 Referring now to FIG. 33, there is illustrated the but seal 321 which is
 anchored in position within the groove 320a of the handle portion 320 via
 legs 321a. The bug seal 321 therefore buts up against the opposite jamb
 portion not shown via edge 320b, that is the same jamb portion to which
 the latching plate of FIGS. 32A and 32B is mounted.
 Referring now to FIG. 34, there is illustrated the cover portion 350 for
 the assembly of FIG. 20 which includes an arm or leg portion 350a which is
 received within the channel 10x of FIG. 21 which includes a locking edge
 at 350b to retain said arm 350a within the compatible groove 10x which
 also includes a detent at 10y to correspondingly lock the flange in
 position. The element 350c therefore is disposed within the interior side
 of the cover 350 to be received within the channels or guides shown in
 FIGS. 28A through 28C at 360b and thereby retain the mounting brackets for
 the screen assembly in the position required allowing the adjustment
 thereof and final fixing in relation thereto.
 Those skilled in the art will also appreciate the fact that a screen
 assembly having two ends separated by a predetermined distance and being
 formed as a continuous screen which may be cut as required at a
 predetermined distance as set out by the length of the tube 305. The
 anchor portions S1 and S2 are a fixed distance and are manufactured with
 the screen on a continuous length of screening which may be cut as
 required including cutting these anchor portions as best seen in relation
 to FIG. 23. This makes screen replacement very easy.
 The entire assembly therefore 300 is provided as a cassette totally
 assembled and insertable into the jamb opening defined by the three sides
 of the jamb 10 at 10a, 10b and 10c. It is only necessary to provide the
 cassette integral with the cover portion 350 which may be either the front
 cover which clips in position as shown in FIG. 21 or a side cover, not
 shown, but easily determined by those skilled in the art from the
 teachings herein.
 Referring now to FIGS. 35A, 35B, 38, 44 and 40, there is provided a tilt
 and slide window assembly 400 wherein a sash 405 including a window light
 may may slide in the track or pivot from the pivotable end thereof as is
 described previously. The sash is pivotally mounted within a frame section
 including jamb portions 410 wherein the screen assembly 420 is contained
 within the opening or pocket 410a provided in the framing jamb portion
 410. As is best seen in FIGS. 21 and 35A, the roller assembly best seen in
 FIGS. 40 and 45 is contained within the opening 410a as fastened in
 position by a corner bracket 422, as best seen in FIG. 40. The jamb
 portion 410 is closed by a cover portion 410b after the screen assembly
 420 is located in its position by the corner bracket 422. The screen will
 therefore pay out along the pathway 413 when the handle portion 430 is
 moved along with the sash 405 when desired. A latch portion and handle
 portion 435 and 436 respectively including a hook portion 436a engages
 with a detent portion 406 at the hook portion 406a. The movement therefore
 of the sash 405 will result in the movement of the screen 420
 automatically and pay it out through the guide recess to cover as much of
 the opening as is desired. That is to say that one may pay out the screen
 10% or 100% to cover the appropriate opening. Because of the design of the
 screen including the telescoping guides as best seen in FIG. 36, the
 screen is guided through channel 412 as best seen in FIG. 35B between
 fully closed and fully opened positions. The glide assembly therefore will
 accommodate and receive the upper edges and the bottom edges of the
 generally T-shaped screen portion as best seen and described in relation
 to FIG. 20. An upper glide 441 therefore and a lower glide 442 is provided
 to ride within the respective channel portions 412 of the jamb framing
 sections. The handle portion 430 therefore is adapted to receive the leg
 portions 441a and 442a of the glide portions respectively as best seen in
 relation to FIG. 37. A bug block 440c is provided as is previously
 described. The screen therefore will pay out from its roller as best seen
 in FIG. 40 and 45 including the glides capturing the edge of the screen
 including the generally T-shaped portion and riding within the guides 412
 of the tilt and slide window assembly. When it is desired not to operate
 the screen, the latch 436 is operated to separate the detents 436a and
 406a. The window will then operate on its own without the screen. Should
 it be desired to recapture the screen, one merely closes the window and
 snap locks the two detents together again to re-engage the screen
 assembly. This is best seen in relation to FIG. 38 and 44 wherein the
 screen is fully payed out and the latch 436 is engaged with the detent
 406.
 Referring now to FIGS. 41 through 43, there is illustrated the method of
 assembling the screen with the generally T-shaped key portions. The key
 portions 456 therefore are manufactured from polyvinyl chloride or the
 like which is a material that may be radio frequency welded. The key
 portions therefore 446 include the head portion 456a for capturing within
 the appropriate groove of the handle and roller portion as best seen in
 relation to FIGS. 19, 21 and 22. The head portion therefore is separated
 from the two portions 456b and 456c, or alternatively 456d and 456e making
 up the leg to capture the screen 455 or sandwich it therebetween. In FIG.
 41, the two legs 456b and 456c are generally connected to one another and
 separated from the head portion 456a by a flexible extension 457 which is
 not radio-frequency welded to the screen 455. This section 457 provides a
 considerable amount of flexing for the screen assembly and reduction in
 damage to the screen 455 as a result of any tensioning load on said screen
 455. Once the two screen-capturing portions 456b, 456c, or alternatively
 456d and 456e, as seen in FIGS. 41 and 42 respectively, capture the screen
 455, the screen is passed through a radio-frequency welding machine
 continuously preferably so as to form a continuous roll of screen
 accumulated on a roll for future use. As best seen in FIG. 43, elements
 450a of this screen which is manufactured from vinyl-coated fiberglass are
 melded into the polyvinyl chloride of the leg extensions 456d and 456e of
 the key element. In this manner, a tough and viable screen assembly is
 provided.
 Referring generally to the figures a method of manufacturing a screen
 roller assembly comprises the following steps:
 1) forming a screen from suitable screen material such as fiberglass and
 preferably coating said screen with vinyl,
 2) forming a generally key-shaped anchor for said screen preferably from
 polyvinyl chloride, preferably said key having a head and a leg comprising
 two portions and a connector connecting said leg to said head, preferably
 said head being generally T-shaped,
 3) separating the two leg portions for receiving the edges of said screen,
 4) radio frequency welding said leg portions capturing said edges of said
 screen and preferably melding said vinyl of said screen with the PVC of
 said key,
 5) forming a continuous screen to be accumulated on a roll as roll stock to
 be supplied to the window manufacturer or repair organization.
 A predetermined amount of screen may be payed of the roll stock roll sized
 to a predetermined window opening size which may be easily assembled with
 the spring-biased roller upon which the screen will accumulate by a
 manufacturer or by a repair person and which also may be engaged with the
 handle portion proximate the other edge of said screen, both said roller
 and said screen handle including a compatibly shaped generally key-shaped
 receiving portion to receive the head of said key for easy installation or
 replacement thereof.
 It is important that the legs of the key portion be separated from the head
 portion by a flexible extension to allow for the accommodation of
 stretching in the screen assembly at that particular location when
 assembled without destroying the screen. It has been found that the screen
 when melded together with the PVC key has considerably more strength than
 the known methods of taping and gluing screen edges to rollers and handle
 portions. The flexibility is provided by the flexible key shape and
 material. Any suitable material can be utilized including those materials
 which readily accept hot welding. However, radio frequency welding is
 preferred because one does not have to allow for creeping of the material
 and the allowances of temperature differentials. Cold dies may be provided
 which come together to provide a reliable joint which may be accurately
 controlled.
 The present invention advantageously fits into any existing frame design
 thereby reducing cost, easing assembly and improving appearance. It is
 only neccessary to provide a pocket with the jamb, header or sill of any
 window design within which the screen roller assembly is placed preferably
 as a cassette.
 As best seen in FIG. 46 to produce a screen one cuts from roll stack the
 "T" edge screen 450 to fit inside the frame opening of the window allowing
 for the guiding track depth less any clearances required. The roller drum
 458 and handle 430 are cut to screen length providing for clearance as
 required. The "T" edge of the cloth 456a is slid into the drum slot 458a
 and the other "T" end 456a being slid into the handle slot 430a thereby
 fixing the screen to the critical components. A telescoping glide with its
 own "T" slot groove as previously described supports the screen in the
 guide track at each end thereof and allows the glide the freedom to move
 back and forth on the "T" edge of the screen taking up the opening
 tolerance.
 Because the "T" edge is flexible and able to stretch, any local load on the
 screen cloth will distribute itself over a wide range of fibers of the
 screen thus improving the impact and tear resistance of the system. In the
 event that screen was pushed it would pay out the stored material to the
 end limit reducing dramatically the stress forces on the system. With the
 high tensile capability of the "T" edge system, the risk of failure of the
 system is greatly reduced. In servicing a screen that is already installed
 on site, a bolt of screen cloth carried by the service person need only be
 cut to the right length, the cover removed from the system to give access,
 the old screen cloth slide out and the new screen cloth rethreaded. There
 is no need for any other component replacement if they are sound.
 The screen is self storing within the frame of the window by virtue of
 accumulating on a roller similar to the operation of a roller blind. It is
 payed out by pulling on a full length handle which is guided by a rail at
 each end. The window frame includes a guide channel for the screen which
 tracks and covers the free edges of the screen. The handle provided with
 the screen engages the adjacent sash frame section with latch detents
 provided which will maintain the screen under tension from the dispensing
 drum and covers the opening created when the sash is opened by sliding in
 the track wrinkle free and bug tight.
 Referring generally to FIG. 47 the leading edge of said detent provided
 with said window sash has a chamfered edge adjacent 406a to cause the
 latch including a hook portion 436a to ride up on said chamfered edge and
 engage with a compatible hook portion 406a disposed with said detent of
 said window sash.
 As many changes can be made to the invention without departing from the
 scope of the invention, it is intended that all material contained herein
 be interpreted as illustrative of the invention and not in a limiting
 sense.