A folding window for use in an automotive vehicle

Abstract: A hinge is provided for connecting together two adjacent panes (101,102) in a window of an automobile having a fold-down convertible top (130). The hinge comprises two separate, opposing lengths of tape (103,104), each having transverse reinforcing fibres associated therewith. Each length of tape further includes adhesive on one side thereof for adhering each length of tape onto the opposite edges of the two adjacent panes (101,102).

Description: This invention relates to a folding window for use in an automotive vehicle. More particularly, this invention relates to an improved hinge having sufficient strength to connect together two adjacent panes in a window of an automobile having a fold-down convertible top. Automobiles having fold-down convertible tops are well-known in the art. These fold-down tops have traditionally included a rear window in order to provide visibility to the rear of the automobile. Usually the rear windows employed in these automobiles have been made from a flexible plastic material. Rear windows made from a flexible plastic material, however, have tended to become brittle and crack over time. Also, such windows have tended to lose their transparency over time due to discoloration, scratches, and the like. In view of the disadvantages of plastic rear windows, windows made from other transparent materials, such as glass, have been proposed for use in convertible tops for automobiles. In order to use rear windows made from a non-flexible material, such as glass, the rear windows must be of a size to permit the convertible top to fold-down for compact storage. As an attempt to achieve a permissible size, it has been proposed to use a folding glass window made from two glass panes connected together by a flexible hinge. Attempts have been made in the past to create a reliable, flexible hinge for connecting together two glass panes for use as a folding rear window in a convertible top. For example, a hinge has been made from an elongated bead of a silicon rubber-based adhesive material or the like bonded between adjacent edges of the glass panes. Unfortunately, this hinge has not been fully successful since it has tended to separate, crack or tear after an inadequate number of folding cycles. A further attempt at making a flexible hinge for connecting together two glass panes of a rear window for use in a convertible top is disclosed in US-A-4,799,727. This hinge is made from a unitary extrusion of flexible material having two opposing U-shaped channels joined together by an intermediate hinge segment located to one side of the unitary extrusion. This hinge, however, has the disadvantage of only permitting folding movement of the rear window in one direction due to the location of the intermediate hinge segment. Further, since a substantial amount of stress tending to pull the two panes apart occurs at the hinge when the automobile top is in the up position, the strength of this hinge is questionable because the two opposing U-shaped channels are joined only by the intermediate hinge segment. Accordingly, there remains a need for an improved flexible hinge capable of reliably connecting together two transparent panes for use as a rear window in a convertible top. In accordance with one aspect of the present invention, a folding window for use in an automobile vehicle having a fold-down convertible top comprises a pair of window panes and pliable strip means for flexibly connecting together the pair of window panes. The pliable strip means allows the panes to move toward one another in either a first or second opposite folding position and includes means for adhering the strip means to the window panes. The pliable strip means may include means for reinforcing the pliable strip means to permit the strip means to connect together the pair of window panes. The reinforcing means may comprise reinforcement fibres, such as glass fibres, aramid fibres, carbon fibres, metal fibres, cotton fibres or the like, which preferably extend substantially transversely to the length of the pliable strip means. The pliable strip means may comprise a pair of opposing pliable strips and the adhering means may comprise adhesive on one side of each of the pair of opposing pliable stripes. Further, each of the pair of window panes may be made from a transparent material, such as glass, a polymeric resin, or the like. In accordance with a further aspect of the present invention, a folding window for use in an automobile vehicle having a fold-down convertible top comprises a pair of window panes and pliable tape means for flexibly connecting together the pair of window panes. The pliable tape means includes means for adhering the tape means to the window panes. The pliable tape means may include means for reinforcing the pliable tape means to permit the tape means to reliably connect together the pair of window panes. The reinforcing means may comprise reinforcement fibres, such as glass fibres, which extend substantially transversely to the length of the pliable tape means. The pliable tape means may comprise a pair of opposing pliable tape strips and the adhering means may comprise adhesive on one side of each of the pair of opposing pliable tape strips. Preferably, each of the opposing pliable tape strips is transparent in order to improve visibility to the rear of the automobile. Each of the opposing pliable tape strips may further comprise a silicone-based polymer matrix having means therein for reinforcing the matrix. Accordingly, it is an object of this invention to provide an improved hinge having sufficient strength to reliably connect together two adjacent panels in a window of an automobile fold-down convertible top. The invention will now be described further, by way of example, with reference to the accompanying drawings, in which : FIG. 1 is a partial perspective view of an automobile vehicle having a fold-down convertible top employing a folding rear window having the improved hinge of the present invention, with the convertible top shown in an up position; FIG. 2 is a partial perspective view similar to FIG. 1 but illustrating the convertible top and rear window in a partially folded position; FIG. 3 is an enlarged sectional view of a folding rear window having the improved hinge of the present invention taken generally along line 3-3 of FIG. 1; FIG. 4 is an enlarged sectional view of a folding rear window having the improved hinge of the present invention taken generally along line 4-4 of FIG. 2; FIG. 5 is an enlarged sectional view of a folding rear window employing the hinge of the present invention with the window being shown in a down (folded) position; and FIG. 6 is an enlarged partially broken out perspective end view of a rear window in an unfolded position employing the improved hinge of the present invention. Referring to the drawings and particularly to FIGS. 1 and 2, an improved hinge 100 is shown flexibly connecting together an upper window pane 101 and a lower window pane 102 of a foldable window. The foldable window, as shown in FIGS. 1 and 2, may be a rear window 120 of an automobile vehicle 140 having a convertible top 130. The fold-down convertible top 130 is typically made from a foldable material, such as vinyl, canvas or the like, supported upon a foldable frame (not shown). The fold-down top 130 is capable of being used in an unfolded or "up" position, as shown in FIG. 1, for covering the passenger compartment of the vehicle 140. The fold-down top is also capable of being used in a folded or "down" position for compact storage, thereby exposing the passenger compartment. FIG. 2 illustrates the top in a partially folded condition. The upper and lower window panes 101 and 102, comprising rear window 120, are capable of being folded together by way of improved hinge 100. By permitting the upper and lower window panes 101 and 102 to fold together, the improved hinge 100 allows rear window 120 to fold-down to a small enough size to permit the convertible top 130 to be stored in a compact position. FIG. 2 illustrates the two panes 101 and 102 folding out and away from the passenger compartment of the vehicle 140. Alternatively, the two panes 101 and 102 may, instead, fold in toward the passenger compartment. Window panes 101 and 102 are preferably made from a transparent material in order to provide visibility to the rear of the vehicle 140. The preferred material from which the window panes are made is glass since it has very good optical properties, is scratch resistant, and defrosting heating elements (not shown) may be added thereto. Alternatively, the window panes 101 and 102 may be made from a transparent polymeric resin material, such as polycarbonate, an acrylic resin or the like. As shown in more detail in FIGS. 3-6, the hinge 100 comprises two separate, opposing strips of tape 103 and 104. Both strips of tape 103 and 104 are bonded onto the opposite edges 106 and 107 of the upper and lower panes 101 and 102, respectively. Both strips of tape also adhere to one another in a gap 108 located between the two opposite edges 106 and 107. Both strips of tape 103 and 104 include a plurality of reinforcing fibres 105. Preferably, the plurality of reinforcing fibres 105 are arranged in a substantially parallel and spaced relation and extend transversely to the length of each of the strips 103 and 104. The transverse reinforcing fibres 105 preferably comprise glass fibres since such fibres are strong, can bend without breaking and are capable of withstanding exposure to the outside environment for an extended period of time. Even though glass fibres are preferred, the reinforcing fibres 105 may comprise other materials, such as cotton fibres, metal fibres, aramid fibres (one of which is sold under the trade name of KEVLAR by E.I. du Pont de Nemours and Co.), carbon fibres or the like. It should be apparent that each strip of tape 103 and 104 may also include, in addition to transversely extending reinforcing fibres 105, other fibres (not shown) which extend in other directions. Preferably each strip of tape 103 and 104 comprises a silicone-based polymer matrix having the reinforcing fibres 105 located therein. A silicone-based polymer matrix is preferred since it is capable of withstanding exposure to the outside environment for an extended period of time while maintaining flexibility. Even though a silicone-based polymer tape is employed in the described embodiment, it is contemplated that any other tape having reinforcing fibres therein and which is capable of withstanding exposure to the outside environment for an extended period of time could be utilised in the practice of this invention. The silicone-based polymer matrix 115 includes, on one side thereof, an adhesive 109, such as an acrylic-based pressure sensitive adhesive or the like, for adhering the strips 103 and 104 to the window panes 101 and 102. The silicone-based polymer strips 103 and 104, having adhesive 109 thereon, are applied with pressure for bonding the strips 103 and 102 to the panes 101 and 102. In use, the reinforced strips of tape 103 and 104, comprising hinge 100, connect together the upper and lower window panes 101 and 102, as shown in FIG. 1. The reinforced strips of tape 103 and 104 are capable of flexing, as shown in FIGS. 2, 4, and 5 to allow the panes 101 and 102 to move together or apart as the convertible top 130 moves from its unfolded position to its folded position, and visa versa. Since the strips of tape 103 and 104 include a plurality of reinforcing fibres 105, the strips 103 and 104 are capable of reliably connecting together the window panes 101 and 102 for numerous bending cycles without significant risk of separation of either pane from the hinge 100. While a particular embodiment and details thereof have been shown for purposes of illustrating the invention, it will be apparent to those skilled in the art that various changes in the hinge disclosed herein may be made without departing from the scope of the invention, which is defined in the appended claims. For example, it is contemplated by this invention that the hinge 100 may comprise one strip of tape having reinforcing fibres therein placed either on the passenger compartment side of the rear window 120 or on the side of the window 120 exposed to the environment.

Claims: A folding window for use in an automobile vehicle having a fold-down convertible top (130), the window comprising, a pair of window panes (101,102), and pliable strip means (103,104) for flexibly connecting together said pair of window panes (101,102), said pliable strip means (103,104) including means for adhering said strip means to said window panes (101,102), characterised by said pliable strip means (103,104) allowing said panes to move toward one another in either a first or second opposite folding position. A folding window as claimed in claim 1, wherein said pliable strip means (103,104) includes means (105) for reinforcing said strip means, thereby permitting said strip means to connect together said pair of window panes. A folding window as claimed in claim 1, wherein said pliable strip means comprises a pair of opposing pliable strips (103,104) and said adhering means comprises adhesive on one side of each of said pair of opposing pliable strips (103,104). A folding window as claimed in claim 2, wherein said reinforcing means (105) comprises reinforcement fibres. A folding window as claimed in claim 4, wherein said reinforcement fibres (105) extend substantially transversely to the length of said pliable strip means (103,104). A folding window as claimed in claim 2, wherein said reinforcing means (105) comprises cotton fibres, aramid fibres, glass fibres, metal fibres or carbon fibres. A folding window as claimed in claim 1, wherein each of said pair of window panes (101,102) is made from a transparent material. A folding window as claimed in claim 1, wherein each of said pair of window panes (101,102) is made from glass or polymeric resin. A folding window as claimed in claim 1, wherein said pliable strips means (103,104) comprises a silicone-based polymer matrix having means (105) for reinforcing said matrix therein.

Inventors: BONNETT ROY EUGENE, BONNETT, ROY EUGENE
Applicants: FORD FRANCE, FORD MOTOR CO, FORD WERKE AG, FORD FRANCE S. A., FORD MOTOR COMPANY, FORD MOTOR COMPANY LIMITED, FORD-WERKE AKTIENGESELLSCHAFT
Application year: 1991
Main classification: B60J7
IPC codes: B60J1, B60J7, E06B3, E05D1, E05D9