NL8520086A - METHOD AND APPARATUS FOR APPLICATING AN OPENING PREVENTING PLASTIC COATING ON GLASS - Google Patents

Description

. * '8 5 2 0 0 86 1 R V. d. I. E f

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Method and device for applying an opening layer of plastic material on glass. r

Field of technology

The invention generally relates to a method and an apparatus for applying a layer of a plastic material to a glass plate, and in particular, to a method for manufacturing a window assembly that prevents ripping open for use in motor vehicles.

Background art

It has been found that the addition of a plastic layer adhered to the inboard glass surface of a conventional laminated windshield can further enhance the safety of the windshield. This plastic layer is typically referred to as a screen that prevents ripping, because it has been found that the additional plastic layer significantly reduces the number and severity of ripped injuries of persons thrown against the windshield, among all collision conditions will decrease. Furthermore, It has been found that the ripping screen appears when this is | manufactured under certain conditions, the suitability of the laminated improved windshield to slow down the movement of a person thrown against the windshield, while also improving the penetration resistance of the windshield when compared to conventional 1 | laminated windshields is larger. It also reduces tearing coming screen the amount of flying glass so the injury i j of occupant that is the result of objects hitting the windshield; ! may have been thrown from viaducts or from outside the vehicle; I: I25 An example of a type of tear-open windshield is described in U.S. Patent No.

! 4 242 403. In this patent, the ripping-off screen contains a: 1: | penetration resistant multi-layered body consisting of an inner '1 | layer of a relatively soft stretchable plastic material, such as polyvinyl butyral adhered to the inboard surface of the windshield, an intermediate layer of a somewhat more durable plastic, such as polyester, with an outer cover of an abrasion resistant material. Another type of open window windscreen is described in 8520086 i τ - 2 -

U.S. patent; no. 3,808 077 in which a single layer of polyurethane is used as a screen to prevent ripping open,

While the effect of a laminated windshield with a screen that prevents ripping is clear, very few vehicles use such a windshield. The main reason for this limited use has been the difficulty experienced in attempting to manufacture a windshield with a production-preventive cut-open screen. In the automotive industry, the standard for windshields has been set very high, especially with regard to the optical properties, and it has been very difficult to manufacture a windshield with a tear-resistant screen free of optical errors. Even when the individual sheets or plates of the laminated assembly are free from optical errors before being joined together, it is difficult to join them and | 15 preserve the optical properties.

Description of the invention.

The invention relates to an exceptional method! for the manufacture of a windshield windscreen pre-winding assembly coming. The first step involves bringing together a substrate substrate of glass with a predetermined curvature, a plate that prevents tearing, and a cover of glass with substantially the same curvature as a substrate substrate of glass, into a stack. In the preferred embodiment of the invention, the site that prevents ripping is

S

i a composite plastic sheet containing an inner layer of polyvinyl-I25 butyral which layer is suitable for: adhering to the substrate plate of glass, an intermediate layer of polyester and an outer layer of j an abrasion resistant material suitable for adhering to the cover plate made of glass. Once the stack of individual layers has been assembled, a vacuum ring is placed around the circumference. ! 30 edges of the laminated glass assembly and coupled to a vacuum source to rid the assembly of air and the individual; layers together.

Then, the assembly is placed in an autoclave unit in which the laminated glass assembly is heated to a predetermined temperature in the range of 141 ° C (285 ° F) 8520086 t-3 - to 152 ° C (305 ° F) while simultaneously applying pressure to the outer surfaces of the laminated assembly. It has been found that when an anti-rip composite plastic sheet of the type described above is used, the junction temperature in the autoclave is very critical. For example, the temperature in the autoclave should be high enough to properly bond the polyester interlayer to the polyvinyl butyral inner layer, while the temperature should be low enough to prevent hairline cracks in the abrasion resistant coating. obstruct.

Once a predetermined temperature and a predetermined pressure in the autoclave are reached, these values are maintained for a predetermined time. At the end of this time, the temperature in the autoclave is lowered while; ; 15 the pressure on the predetermined value is maintained. After the temperature has dropped below a predetermined point, such as 52 ° C (125 ° F), the pressure can then be reduced and the laminated assembly removed from the autoclave.

| The invention also relates to the use of a; 20 vacuum ring with an exceptional construction. The vacuum ring is | fitted with a valve member such that the vacuum ring can be | detached from a vacuum source while maintaining the vacuum in the ring. If desired, the vacuum ring can then be reattached! locks to the vacuum source.

The method according to the invention may further comprise the step of, after manufacturing a glass assembly which: prevents ripping, removing a certain part or parts, of the plate which prevents ripping, from the substrate plate of glass to determine an exposed glass surface that can be used either by mounting the front pane in an associated frame: / or for mounting a rear-view mirror assembly.

In the alternative, the invention relates to the use of an exceptional cover plate which is used for placing; 35 the sheet that prevents ripping, in a particular position on the glass plate to which the sheet that prevents ripping is to be connected. Brief description of the drawings

Fig. 1 is a rear view of a laminated glass pane assembly obtained by the method of the invention; FIG. 2 is a fragmentary sectional view taken along line 2-2 in FIG. 1; FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 2 showing the individual layers from which the composite plastic sheet is prevented; there are open rows; Fig. 4a is a fragmentary cross-sectional view showing the individual layers that make up the first I sub-assembly used in the method of the invention; FIG. 4b is a fragmentary cross-sectional view showing the individual layers that make up the second subassembly used in the method of the invention; Fig. 5 is a plan view of the laminated glass assembly with a vacuum ring attached thereto used to evacuate all air spaces between the individual layers; FIG. 6 is a fragmentary view of a door j; Cut made along line 6-6 in Figure 5 showing the laminated glass assembly with the vacuum ring placed around its peripheral edge; and FIG. 7 is a graph showing pressure and | temperature as occurs preferably during the 130 autoclave treatment.

| Modes for Carrying Out the Invention At the beginning of this description, it should be noted that, while the exemplary embodiment of. The invention, which is shown in the drawings and described herein, relates to a pane-preventing assembly which consists of two laminated sheets of glass, it will be appreciated that the process and 8520086 i * - 5 - The device according to the invention can be easily adapted to the manufacture of a window which prevents ripping and which consists of a single glass plate. It will also be appreciated that while the preferred embodiment of the invention is described as a vehicle windshield, the window that prevents tearing open can also be used as a side or rear window of a vehicle, or as a window in other types. .

Referring to Figures 1 to 3, there is shown a type of laminated glass assembly, such as a car windshield 10, 10, which can be manufactured by a method according to the present invention. The windshield 10 contains two glass plates 12 and 14; which are joined together by an intermediate plastic layer 16 placed therebetween. The plastic intermediate layer 16 is typically a sheet of relatively soft stretchable plastic material with a thickness in the range of 0.64 mm (0.025 inch) to 1.02 mm (0.040 inch) which can be bonded to a glass surface. In the preferred embodiment of the invention, the plastic intermediate layer 16 is a polyvinyl butyral sheet of about 0.76 mm (0.030 inch) to 0.95 mm (0.0375 inch) thickness. The glass plates 12 and 14 are furthermore preferably float glass plates with a thickness in the range of 1.8 mm (0.070 inch) to 3.2 mm (0.125 inch). In the preferred embodiment! of the invention, the glass plates 12 and 14 have a thickness of about 2.5 mm (0.100 inch). If a single-pane glass pane that rips open · i | must be manufactured, the thickness of the single glass; | Plate typically in the range of 2.3 mm (0.090 inch) to 3.8 mm (0.150 inch). j I In addition, the glass plate 14, which is intended to face 1 • the interior of the vehicle, is fitted with a | j composite plastic sheet 18 which prevents ripping and is joined-1; 30 den with the inboard glass surface 14a. As shown in the enlarged sectional view of Figure 3, the tear-away plate 18 is a three-layer composite plate comprising a layer 20 of a relatively soft stretchable plastic material, a layer 22 of a somewhat more durable plastic material, and an outer coating or outer layer 24 of an abrasion resistant plastic material.

8520086 t * - 6 -

In the preferred embodiment of the invention, the soft stretchable plastic layer 20 is about 0.38 mm (0.015 inch) thick and may be, for example, polyvinyl butyral, while the more durable plastic layer 22 is about 0.05 mm (0.002 inch) to 0.18 mm ( 0.007 inch) thick and may be, for example, a heat-treated polyester. If a single pane pane that prevents riping is to be produced, the inner layer of polyvinyl butyral is typically 0.76 mm (0.030 inch) to 1.14 mm (0.045 inch) thick.

The abrasion resistant coating 24 is relatively thin in comparison to layers 20 and 22 and may be a silica-reinforced organopolysiloxane compound. Specifically, the plastic layers 20 and 22 and the abrasion resistant coating 24 may be of the types disclosed in U.S. Patents 3 900 673, 4 059 469, 4 112 171, 4 177 315, and 4 242 403, all of which are herein incorporated by reference. this reference is deemed to be included. A composite | plastic sheet that prevents tearing and is of the kind used in the preferred embodiment of the invention can be obtained from E.I. Du Pont De Nemours and Company, Wilmington, Delaware, U.S.A.

I; ! As stated earlier, the invention relates to an An unusual method of manufacturing a laminated glass assembly of the type shown in Figures 1 to 3. In the method of the invention, the individual layers from which it is formed; [laminated assembly exists, first assembled in two separate! | equal subassemblies. It. first subassembly 26, shown in FIG.

| 25 4a, consists of a stack containing the pair of glass plates 12 and 14i | j! with interposed plastic intermediate layer 16. The second part assembly 28, shown in Fig. 4b, contains the composite plastic sheet 18 which prevents ripping and which is placed on a surface 30a! of a glass cover plate 30 with substantially the same curvature as the glass plates 12 and 14. The open-plate composite plate is placed on the cover plate 30 such that the abrasion-resistant material is protected against damage. coating 24 abuts surface 30a. Typically, the de-: plate 30 is formed from a plate float glass. As will be discussed, the cover plate 30 is used to obtain a laminate.

High optical quality glass assembly by assisting in bonding the anti-riping plate 18 to the outer surface 14a of the glass plate 14.

It has been found that when manufacturing a windshield of the type that prevents tearing and as shown in Figs. 5 to 3, it is desirable that the tearing plate 18 should not cover certain parts of the inboard glass surface 14a such that these particular portions provide a bare glass surface. For example, in Figure 1, the edge of the anti-rip plate 18 is slid inwardly from the side of the glass plate 14 to define a peripheral edge portion 14b with an exposed glass surface. It has been found that such an exposed | glass surface is desirable when mounting the windshield in a | associated vehicle frame because the adhesives typically used for securing the windshield in the frame have been found to adhere more easily to a glass surface which is docked to the plastic surface of the slash preventing plate. 1, a round piece cut from the plate 18 that rips open! to determine a round section 14c with an exposed: glass surface. The round portion 14c can be used to secure a rear-view mirror mounting assembly to the front spout. !

j Except that they provide a better adhesive surface

When purchasing the exposed glass surfaces, there are other advantages. For example, in the event that a windshield 25 is to be temporarily removed from the vehicle, or in the event that a transom mount is to be replaced, any damage to the plate preventing ripping is avoided. Also, if the feed frame or the transom mount directly on the plate would open prevents ripping, was glued, any separation from the frame or; 30, the mirror mount of the windshield causes the anti-rip plate to become detached from the glass substrate plate, thereby causing distortion in those areas.

Although the gap-opening plate 18 may be bonded to the entire glass surface 14a, and certain portions of the gap-preventing plate may then be removed from the glass surface 14a 8520086 1 - 8 to absorb the particular exposed glass surface portions 14b and 14c. supply, removing certain parts of the rip-open sheet can be a relatively time-consuming task and cause damage to; 5 the substrate plate of glass. Preferably, the open-ripping plate is initially cut to predetermined dimensions such that when the open-ripping plate is properly positioned and bonded to the glass plate 14, the particular portions of the glass surface 14a remain exposed and there is no need for any subsequent updating and removal of parts of the rip-open sheet.

In order to assist in placing the rip-preventive plate 18 on the glass surface 14a, the method of the present invention utilizes a cover plate 30 of exceptional design.

| 15 More specifically, the. Glass cover plate 30 according to the invention a positioning member such as for instance an upright; rim or gasket 32 secured around the peripheral edges of the surface 30a j to define a boundary within which the open rows j | common plate 18 must be placed. The gasket 32 is manufactured; | ; 20 made of a resilient material with a thickness approximately equal to is the total thickness of the ripening plate. Although i | the gasket 32 may be made of cork, silicone, fiber-reinforced silicone or rubber, it has been found desirable to manufacture the gasket; I digen of Teflon. Typically, the surface of the Teflon gasket to be attached to the glass surface of the cover plate is | treated in a special way to contribute to the adhesion of the gasket to the cover plate. It has been found that a conventional epoxy resin I provides a suitable means for attaching the Teflon; gasket on the glass surface.

| The location on the surface 30a of the cover plate where the gasket 32 is attached corresponds to the peripheral edge portion 14b on the glass surface 14a to be left exposed. In addition to the peripheral gasket 32, a round gasket 34 is affixed to the surface 30a in the location corresponding to the exposed round 35 part 14c for the mirror mounting assembly. Thus, in the preferred embodiment of the invention, the anti-rip composite plastic sheet 18 is pre-cut to dimensions enabling the sheet 18 to be placed on the surface 30a of the cover sheet within the boundary of the circumferential gasket. 32. Also, in the slash-preventing plate, as shown in Fig. 4b, a round portion 18a is cut out at the location corresponding to the round joint 34.

It has been found that prior to placing the anti-riping plate 18 on the surface 30a of the glass cover plate 30, it is desirable to apply a release agent to the surface 30a to easily remove the cover plate 30 from the plate. which prevents ripping after the latter has been connected to the glass plate 14. Although the release agent may be a conventional silicone wax, it is preferable to use a | To use silane of the formula R n -Si (OR) ^ _ n, wherein R is an alkyl-! group is era a number from 1 to 3. In this connection good results have been obtained with the use of an alkyl-trialkoxy silane and in particular of n-propyl-trimoxysilane, and of dialkyl dialkoxy silanes, in particular diethyl diethoxysilane.

20 After the two separate subassemblies as | shown in Figs. 4a and 4b, the two separate subassemblies are assembled to yield a laminated glass assembly in which the polyvinyl butyral layer 18 of the open-plate 18 belongs to the second; subassembly 28 abuts the outwardly facing glass surface 14a of the first subassembly 26. Before assembling the two subassemblies, it is preferable to prime the outwardly facing glass surface 14a to help when joining the ripening plate 18 to the glass plate 14. The primer can be a silane solution containing 0.5 to 3 volume% silane in a solvent 1 such as isopropyl alcohol The silane can be gamma-aminopropyltriethoysilane are available from Unium Carbide Corporation, Danbury,

Connecticut, U.S.A. under the trade designation A-1100.

After the first subassembly and the second subassembly are placed together to form the laminated glass assembly, the air spaces between the individual layers are evacuated to compress the individual layers. This can be accomplished by placing a vacuum ring 36, as shown in Figures 5 and 6, around the peripheral edge of the laminated glass assembly. The vacuum ring 36 defines an inner chamber 36a in communication with a flexible conduit 37 suitable for to be connected to a vacuum source (not shown). The vacuum ring 36 can be made of, for example, silicone or neoprene.

: 10 The method according to the invention uses a vacuum ring with an exceptional construction. In particular, the vacuum ring is provided with a shell-breakable coupling 38 with a valve member included therein. Such a coupling is commercially available from Crawford Fitting Co. in Solon, Ohio, 15 U.S.A., as part No. SS-QC-4-D-4HC. After the vacuum ring 36 is placed around the laminated glass assembly and is coupled to one! vacuum source for a predetermined time to vent the assembly, the vacuum ring may be detached from the vacuum source and the valve member will continue to maintain the vacuum in the chamber 36a.

The laminated assembly with the vacuum ring attached thereto is then placed in an autoclave unit (not shown) designed to apply pressure to the outer surfaces of the laminated assembly while simultaneously heating the entire laminated assembly to a predetermined I: temperature to allow the intermediate plastic layer 16 to bond to the pair of glass plates 12 and 14 and to bond the PVB layer of the anti-rip plate 18 to a surface 14a of the glass plate 14. In the case of a composite plastic plate, 30 to prevent ripping of the kind shown in FIG. 3, the autoclave operation also allows the polyester interlayer 22 to bond to the inner layer 20 of polyvinyl butyral.

When staying in the autoclave, the vacuum ring 36 can be turned off; ports to the vacuum source to maintain the vacuum in the chamber 36a during the bonding treatment.

I 1 - 11 -

Typically, the pressure in the autoclave is in the range of 1379 kPa (200 psi) to 1896 kPa (275 psi), while the temperature is in the range of 121 ° C (250 ° F) to 163 ° C (325 ° F) . These pressurized temperatures are typically maintained for about twenty to thirty minutes to ensure an effective bond between the individual layers.

It has been found that in case an anti-rip composite sheet of the type shown in Fig. 3 is used, the junction temperature in the autoclave 10 is very critical. For example, the temperature in the autoclave should be high enough to allow the polyester interlayer 22 to properly bond to the polyvinyl butyral inner layer 20, and the temperature should be low enough to prevent hairline cracks in the abrasion resistant coating 24. It has been found that an autoclave temperature in the range of 141 ° C (285 ° F) totel52 ° C

(305 ° F) provides satisfactory results. For optimal results, a temperature of approximately 146 ° C (295 ° F) should be used.

| Fig. 7 shows a graph of the course of time i | the preferred temperature / pressure flow for the compound; Autoclave treatment of a window pane assembly that prevents ripping and that uses the composite plate that prevents open riping, according to FIG. 3. As shown in FIG. 7, after the laminated assembly has been placed in the autoclave and the autoclave is sealed, the pressure and temperature are increased until the | 25 pressure reaches 1724 kPa (250 psi) and the temperature reaches 146 ° C (295 ° F). The pressure and temperature are then held at these heights for about 25 minutes. i

After the 25 minute time, the temperature becomes; | lowered while maintaining the pressure at 1724 kPa (250 psi) to allow 30 to ensure that the surface 30a of the cover plate 30 is in perfect condition remains in contact with the plate which prevents ripping. Otherwise, reducing the pressure before the laminated assembly has sufficiently cooled may cause the cover plate to pull away in certain areas of the plate which prevents ripping, thereby causing a distortion. 35 to cause large deformation in those areas After the temperature

8 5 1 O? G C

12 has fallen below a predetermined point, then the pressure can be reduced and the laminated assembly removed from the autoclave. It has been found that dropping the temperature below 52 ° C (125 ° F) before lowering the pressure yields satisfactory results.

After the laminated assembly is removed from the autoclave, the vacuum ring 36 is removed. Then, the cover plate 30 can be removed from the laminated assembly such that the remaining portion of the laminated assembly forms the windshield 10 of FIG. 1 which prevents ripping.

In accordance with the provisions of the patent granting rules, the principle and mode of operation of the invention have been explained and described in what is considered to be the preferred embodiment. However, it should be clear; That the invention may be practiced otherwise than as specifically exemplified and described without departing from the scope of the following claims.

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Claims (29)

Method for the manufacture of a glass assembly that prevents rip-open, characterized by the following steps: a) the stacking of separate layers, which include a substrate plate of glass with a predetermined curvature, a composite plastic sheet that prevents rip-open and wherein one surface, against the glass substrate plate, and a glass cover plate having at least substantially the same curvature as the glass substrate and abutting the other surface of the composite plate preventing ripping, thereby forming a laminated glass assembly the composite rip-resistant composite sheet comprising an inner layer of polyvinyl- butyral suitable for abutting the glass substrate plate, a middle layer of polyester, and an outer layer of an abrasion resistant material. fine material, suitable to rest against the glass cover; 115 b) pressing the individual layers of the glass assembly together; ; | c) heating the laminated glass assembly simultaneously to step (b) to a predetermined temperature in the range of | 141 ° C (285 ° F) to 152 ° C (305 ° F) for a predetermined time and 120 then lowering the temperature, with the predetermined | temperature is high enough to cover the middle layer of. polyester to the polyvinyl butyral inner layer and to bond the polyvinyl butyral inner layer to the substrate plate of | glass, and sufficiently low to prevent hairline cracks from forming in the abrasion resistant coating; and ! (d) removing the glass cover from the laminated | glass assembly in order to prevent the glass assembly from opening to gain. A method according to claim 1, characterized in that the step: 30 (b) comprises the step of applying a predetermined pressure in the range from 1551 kPa (225 psi) to 1896 kPa (275 psi), for a second predetermined time on the outer surfaces of the laminated assembly to press the individual layers together and then to release the pressure. 8520086 1 J - 14 - A method according to claim 2, characterized in that the predetermined temperature and pressure are both maintained for a predetermined time in the range of 20 to 30 minutes. 4. A method according to claim 2, characterized in that prior to lowering the predetermined pressure applied to the laminate glass assembly, the laminated glass assembly is cooled to a temperature below 52 ° C. (125 ° F). Method according to claim 2, characterized by, simultaneously with the step (b), the step of evacuating spaces between the 10 separate layers in order to further compress the individual layers. The method of claim 1, characterized in that the predetermined temperature is about 146 ° C (295F). A method according to claim 2, characterized in that the pre-determined pressure is about 1724 kPa (250 psi). A method according to claim 3, characterized in that the pre-determined time is about 25 minutes. 8. A method of manufacturing a tear-resistant glass assembly characterized by the following steps: i20 a) stacking individual layers including a glass substrate plate with a predetermined | curvature, an artificial sheet that prevents ripping and of which one -i surface connects to the substrate plate of glass, and a cover plate | of glass with substantially the same curvature as the substrate plate of glass and that against the other surface of the plate which rips open. j. is coming. abut to thereby obtain a laminated glass assembly; b) placing a vacuum ring also around the peripheral edges of the laminated gas assembly, the vacuum ring containing a conduit suitable for coupling to a vacuum source, which conduit includes a valve member for maintaining a vacuum in the ring when the line is disconnected from the vacuum source; c) connecting the conduit to a vacuum source to compress the individual layers and evacuate air spaces between the separate layers; d) disconnecting the conduit from the vacuum source, the valve member contained in the conduit maintaining the vacuum in the ring; E) placing the laminated glass assembly with the attached vacuum ring in an autoclave unit; f) reconnecting the vacuum ring conduit to a vacuum source; g) depressurizing and heating the laminated glass-10 assembly in the autoclave to bond the tear-resistant plate to the glass substrate plate. Sn h) removing the glass cover from the laminated glass assembly so as to obtain the anti-rip glass assembly. 10. A method of manufacturing a glass assembly that prevents tearing open, characterized by the following steps "; | a) the accumulation of individual layers which include a glass substrate plate with a predetermined j | curvature, a plastic plate that prevents ripping and of which ;! one surface abuts the substrate plate of glass, and a cover plate: i of glass with substantially the same curvature as the substrate plate of | glass and which abuts the other surface of the plate which is open; prevents ripping to thereby obtain a laminated glass assembly; b) pressing the individual layers of the: glass assembly together; c) heating the glass assembly to a predetermined temperature at the same time as step (b) to cause the tear-preventing plate to bond to the glass substrate plate; | d)) removing the glass cover plate. of the laminated glass assembly so as to obtain a tear-resistant glass assembly; and e) removing a certain portion or portions of the tear-resistant plate from the glass substrate plate to obtain a tear-resistant glass assembly in which at least a portion of a surface of the substrate plate 8520086 t * - 16 - of glass to which the anti-rip board was attached becomes an exposed glass surface. 11. A method according to claim 10, characterized by applying an adhesive to the exposed glass surface following step (e). 12. A method according to claim 10, characterized in that the determined portion of the anti-riping plate removed in step (e) includes a peripheral edge portion of the anti-riping plate to thereby provide an exposed glass surface along the peripheral edge of the glass substrate plate. A method according to claim 12, characterized by, following step (e), securing the anti-rip glass assembly in a matching frame by applying an adhesive to the exposed glass surface. | 14. A method according to claim 10, characterized in that the determined portion of the rip-preventing plate removed in step I (e) defines an exposed glass surface for: attaching a mirror holder thereto. 15. A method of manufacturing a glass assembly that prevents ripping, characterized by the following steps: I a) providing a substrate plate of glass with a predetermined curvature? | b) providing a plastic sheet that prevents ripping open; and whose outer circumference is smaller than the outer circumference of the; 25 substrate plate made of glass? ! c) providing. a glass cover plate with practically the same. curvature as the glass substrate plate and provided with a locating member disposed on one surface thereof; j (d) the accumulation of individual layers I | ; 30 including the glass substrate plate, the plastic plate which prevents ripping and which connects to an outwardly facing surface of the glass substrate plate, and the glass cover plate which connects to an outwardly facing surface of the plate which prevents ripping, the positioning member from. the glass cover plate is suitable for placing and holding at least a portion of the outer edge 8520081 - 17 - J * of the plate preventing ripping, in an inwardly spaced relation to the outer edge of the glass substrate plate and to sealingly touching the glass substrate plate to prevent the rip-preventing plate from overflowing and adhering to a predetermined portion of the peripheral edge surface of the glass substrate plate which is in contact with the locator during the bonding operation; e) pressing the individual layers of the laminated glass assembly together; , F) heating the laminated simultaneously with step (e)! glass assembly to a predetermined temperature to allow the anti-tear plate to bond to the glass substrate plate; and g) removing the glass cover plate from the laminated glass assembly to obtain an anti-rip glass assembly wherein the predetermined portion of the peripheral edge of the glass substrate plate that has been in contact with the locator is exposed. laid glass surface. 16. Device for use in connecting a j; Plastic sheet with a substrate plate of glass containing a predetermined | has a curvature and an outer circumference greater than the circumference of the plastic sheet, characterized by a glass cover plate with practically the same curvature as the glass substrate plate and suitable for closing against an outwardly facing surface of the plastic sheet; Wherein the glass cover plate comprises a positioning member which is mounted on the one surface thereof is positioned to place and hold at least a portion of the peripheral edge of the plastic sheet in an inwardly spaced relationship with respect to the peripheral edge of the glass substrate sheet, which locator is adapted to seal the substrate sheet under seal of glass to prevent. that the plastic sheet overflows and adheres to a predetermined portion of the peripheral edge surface of the glass substrate plate that is touched by the locator during the bonding operation. Device according to claim 16, characterized in that the glass substrate plate and the glass cover plate are not flat. 85 2 0 PS e f *. » - 18 - Device according to claim 16, characterized in that the positioning member is made of TEFLON. 19. Device as claimed in claim 16, characterized in that the placing member has a thickness which is practically equal to a thickness of the plastic plate. 20. Device as claimed in claim 19, characterized in that the placing member surrounds the entire circumference of the one surface of the cover plate and in that the plastic plate has dimensions such that the placing member keeps the entire circumferential edge of the plastic plate in an inwardly turned distance. relative to the peripheral edge of the glass substrate plate. 21. A method of manufacturing a tear-resistant glass assembly characterized by the following steps: a) providing a glass substrate plate having a predetermined curvature; b) providing a plastic sheet that prevents ripping open; ! c) removing a predetermined section to be cut from the interior of the plastic sheet which prevents ripping open; j d) providing a glass cover plate with substantially the same J20 curvature as the glass substrate plate and provided with a packing member placed on one surface thereof; ie) the stacking of individual layers including the glass substrate plate, the plastic plate which prevents ripping and which adjoins one surface of the substrate plate; glass, and the glass cover plate which connects to an outward-facing surface of the plate which prevents ripping, the cover plate packing member being suitable for insertion into; the cut-out provided in the anti-riping plate: and to touch the glass substrate plate under seal to prevent the 'anti-ripening plate from flowing out and adhering to a predetermined internal portion of one surface of the substrate plate of glass touched by the packing member! during the bonding operation; f) pressing the individual layers of the laminated glass assembly together; 8520086 •>> - 19 - g) heating the laminated glass assembly to a predetermined temperature simultaneously with step (f) to allow the rip-prevent plate to bond to the glass substrate plate; and 5 h) removing the glass cover plate from the laminated glass assembly to obtain a tear-resistant glass assembly, wherein the predetermined interior portion of one surface of the glass substrate plate that was in contact with the packing member is an exposed glass surface. . Device for use in adhering a plastic sheet to a glass substrate sheet having a predetermined curvature, said plastic sheet having a predetermined cut portion removed from the interior of the sheet, characterized by: a cover sheet of glass having substantially the same curvature as the glass substrate plate and adapted to abut an outwardly facing surface of the plastic plate, the glass cover plate having a packing member disposed on one surface thereof to be inserted into the cut-out provided in the plastic sheet, the packing member being adapted to contact the glass substrate plate with sealing to prevent the plastic sheet from flowing on a predetermined internal portion of the one surface of the 1 glass substrate plate which is touched by the packing member during the bonding operation and adheres thereto . 23. Device according to claim 22, characterized in that the glass substrate plate and the glass cover plate are not flat. 24. Device as claimed in claim 22, characterized in that the | packing member is made of TEFLON. ! 25. Device according to claim 22, characterized in that it! ; The packing member has a thickness which is practically equal to the thickness of the plastic sheet. 26. Device according to claim 22, characterized in that the plastic plate has an outer circumference that is smaller than the circumference of the glass substrate plate and that the device further comprises a locating member placed on one surface of the cover plate of 8520086, * VV - 20 - glass for placing at least part of the peripheral edge of: the plastic sheet in an inward-facing distance! relative to the peripheral edge of the substrate plate of; glass, which positioning member is suitable for sealing under · j | 5 to contact the glass substrate plate to prevent the plastic sheet from flowing over a predetermined portion of the circumferential edge surface of the glass substrate plate which is aligned with the organ is in contact during the suturing operation and adheres to it. i 27. Device as claimed in claim 26, characterized in that the placing member surrounds the entire circumference of the entire surface of the cover plate and in that the plastic plate has dimensions such that the placing member covers the entire circumferential edge of the plastic plate. | in an inwardly spaced relation to | relative to the peripheral edge of the glass substrate plate. i i j i (!;; |: i; j: j 8520086 - 21 - 1 .. -. 28. Raising-resistant glass assembly, characterized by: a glass substrate plate; and a plastic plate which prevents ripping and which is adhered to one surface of the substrate substrate of glass, which plastic plate! | 5 that prevents ripping, has an outer circumference smaller than the! | outer periphery of the glass substrate plate such that a predetermined circumferential edge portion of one surface of the substrate plate I | of glass is an exposed glass surface. i 29. Open-glass preventive glass assembly according to claim 28 10 characterized in that the entire peripheral edge of the plastic sheet faces inwardly away from the peripheral edge of the substrate substrate glass plate such that the entire peripheral edge of the one surface! i of the glass substrate plate is an exposed glass surface. | 30. A glass assembly that prevents ripping, according to claim 28, | 15 characterized in that the ripping-resistant plastic sheet includes a predetermined cut portion removed from the interior thereof such that a predetermined interior portion of one surface of the glass substrate plate is an exposed glass surface. 31. Open-glass prevention assembly, characterized by: i a glass substrate plate; and an anti-rip plastic sheet adhered to one surface of the glass substrate sheet, the plastic | rip-preventive plate having a predetermined cut-out portion 25 removed from its interior such that a | predetermined internal part of. one surface of the glass substrate plate j is an exposed glass surface. ; | 8520086