US4152188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for manufacture of laminated glazing
Assignee: Saint Gobain Industries SA
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Filing: 1977-02-09
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Granted: 1979-05-01
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Expires: 1997-02-09
Abstract
Abstract A plastic sheet is laminated to a glass sheet for the manufacture of laminated safety glass by means of an elastic membrane rigidly held at its periphery and subjected to increasing gas pressure, the membrane thereby pressing the plastic sheet against the glass sheet progressively from the center out toward the edges of the latter.
Inventors
- 👤 Hans-Georg Friedrich
- 👤 Friedrich Halberschmidt
- 👤 Rudolf Pelzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:17
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10807; B32B17/10816; B32B17/10825; B32B17/10834; B32B17/10844; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
106 words
A method of laminating a flexible sheet to a surface of a member comprising: freely placing the flexible sheet on an extensible membrane, with the peripheral edges of the flexible sheet being free to be moved upwardly by the membrane; supporting the member spaced above the extensible membrane with said surface for receiving the flexible sheet facing said flexible sheet; then extending the membrane to lift first a central portion of the flexible sheet toward said surface of the member and press said central portion onto said surface and thereafter progressively press the sheet onto the surface radially outwardly from said central portion of the sheet.
Claim 2
Independent Claim
106 words
A method of laminating a flexible sheet to a surface of a member comprising: freely placing the flexible sheet on an extensible membrane, with the peripheral edges of the flexible sheet being free to be moved upwardly by the membrane; supporting the member spaced above the extensible membrane with said surface for receiving the flexible sheet facing said flexible sheet; then extending the membrane to lift first a central portion of the flexible sheet toward said surface of the member and press said central portion onto said surface and thereafter progressively press the sheet onto the surface radially outwardly from said central portion of the sheet.
Claim 3
Dependent Claim
17 words
A method as in claim 1 wherein the member is peripherally supported before the membrane is extended.
Claim 4
Dependent Claim
54 words
A method as in claim 1 wherein, while the flexible sheet is pressed onto said surface of the member, the member is engaged by a second extensible membrane on a second surface opposite to the first-mentioned surface, the membrane first contacting a central portion of the second surface and thereafter extending progressively radially outwardly.
Claim 5
Dependent Claim
16 words
A method as in claim 3 wherein the second extensible membrane is extended by fluid pressure.
Claim 6
Dependent Claim
15 words
A method as in claim 4 wherein the extensible membranes engage the member substantially simultaneously.
Claim 7
Dependent Claim
30 words
A method as in claim 5 wherein the second membrane engages a central portion of the second surface and the membranes are extended radially outwardly at substantially the same rate.
Claim 8
Dependent Claim
43 words
A method as in claim 3 wherein the member is initially peripherally supported and wherein the peripheral support for the member is removed as the membranes extend toward the peripheral edges of the member and the member is supported by the extensible membranes.
Claim 9
Dependent Claim
13 words
A method as in claim 1 wherein the member is a transparent sheet.
Claim 10
Dependent Claim
22 words
A method as in claim 8 wherein said surface of the transparent sheet onto which the flexible sheet is pressed is concave.
Claim 11
Dependent Claim
21 words
A method as in claim 1 wherein an adhesive is disposed between the flexible sheet and said surface of the member.
Claim 12
Independent Claim
137 words
A method of laminating a flexible sheet to a member comprising: freely supporting the member within a gas-evacuable enclosure, with a first surface thereof facing downwardly; supporting the flexible sheet on an extensible membrane mounted in the enclosure and spaced from said one surface of the member, with the peripheral edges of the sheet being free to be moved by the membrane; evacuating the space between the surface and the extensible membrane while maintaining the membrane spaced from said first surface; then establishing a pressure differential between the side of the membrane facing said first surface and the side of the membrane remote from the surface whereby the membrane first lifts the central portion of the flexible sheet into engagement with a portion of the surface and thereafter progressively presses the sheet outwardly onto the first surface.
Claim 13
Independent Claim
137 words
A method of laminating a flexible sheet to a member comprising: freely supporting the member within a gas-evacuable enclosure, with a first surface thereof facing downwardly; supporting the flexible sheet on an extensible membrane mounted in the enclosure and spaced from said one surface of the member, with the peripheral edges of the sheet being free to be moved by the membrane; evacuating the space between the surface and the extensible membrane while maintaining the membrane spaced from said first surface; then establishing a pressure differential between the side of the membrane facing said first surface and the side of the membrane remote from the surface whereby the membrane first lifts the central portion of the flexible sheet into engagement with a portion of the surface and thereafter progressively presses the sheet outwardly onto the first surface.
Claim 14
Dependent Claim
21 words
A method as in claim 11 wherein the member is supported in the enclosure with said first surface substantially horizontally disposed.
Claim 15
Dependent Claim
32 words
A method as in claim 11 wherein a second extensible membrane engages a second surface of the member remote from said first surface while the sheet is applied to said first surface.
Claim 16
Dependent Claim
37 words
A method as in claim 13 wherein a pressure differential is established between said second surface of the member and said second membrane to cause said second membrane to engage progressively said second surface of the member.
Claim 17
Dependent Claim
28 words
A method as in claim 13 wherein, during the pressing of the flexbile sheet onto said first surface, the member is supported between the first and second membranes.
Claim 18
Dependent Claim
15 words
A method as in claim 11 wherein said first surface of the member is concave.
Claim 19
Dependent Claim
19 words
A method as in claim 11 wherein the member is a light-transmitting sheet and the flexible sheet is light-transmitting.
Claim 20
Dependent Claim
19 words
A method as in claim 11 wherein the member is an automotive windshield and the flexible sheet is transparent.
Claim 21
Dependent Claim
26 words
A method as in claim 11 including the step of releasably restraining the periphery of the flexible sheet as it is pressed onto the first surface.
Claim 22
Independent Claim
112 words
A method for laminating a plastic sheet to a surface of a rigid glass sheet comprising: freely placing the plastic sheet on an extensible membrane with the peripheral edges thereof being free to be moved upwardly by the membrane; supporting the glass sheet spaced above the extensible membrane with the surface to receive the plastic sheet facing said plastic sheet; then extending the membrane to lift first a central portion of the plastic sheet toward said surface of the glass sheet and press said central portion onto said surface and thereafter progressively press the plastic sheet onto said surface of the glass sheet radially outwardly from said central portion of the sheet.
Claim 23
Independent Claim
112 words
A method for laminating a plastic sheet to a surface of a rigid glass sheet comprising: freely placing the plastic sheet on an extensible membrane with the peripheral edges thereof being free to be moved upwardly by the membrane; supporting the glass sheet spaced above the extensible membrane with the surface to receive the plastic sheet facing said plastic sheet; then extending the membrane to lift first a central portion of the plastic sheet toward said surface of the glass sheet and press said central portion onto said surface and thereafter progressively press the plastic sheet onto said surface of the glass sheet radially outwardly from said central portion of the sheet.
Claim 24
Dependent Claim
15 words
A method as in claim 20 wherein said surface of the glass sheet is concave.
Claim 25
Independent Claim
133 words
A method of laminating a flexible sheet to a surface of a member comprising: placing the flexible sheet freely on an extensible membrane, with the peripheral edges of the flexible sheet being free to be moved by the membrane; peripherally supporting the member spaced above the extensible membrane with said surface for receiving the flexible sheet facing said flexible sheet; then extending the membrane to lift first a central portion of the flexible sheet toward said surface of the member and press said central portion onto said surface and thereafter progressively press the sheet onto the surface radially outwardly from said central portion of the sheet and removing the peripheral support for the member as the membrane extends near the periphery of the member and the member is supported by the extensible membrane.
Claim 26
Independent Claim
133 words
A method of laminating a flexible sheet to a surface of a member comprising: placing the flexible sheet freely on an extensible membrane, with the peripheral edges of the flexible sheet being free to be moved by the membrane; peripherally supporting the member spaced above the extensible membrane with said surface for receiving the flexible sheet facing said flexible sheet; then extending the membrane to lift first a central portion of the flexible sheet toward said surface of the member and press said central portion onto said surface and thereafter progressively press the sheet onto the surface radially outwardly from said central portion of the sheet and removing the peripheral support for the member as the membrane extends near the periphery of the member and the member is supported by the extensible membrane.
Claim 27
Independent Claim
164 words
A method of laminating a flexible sheet to a member comprising: peripherally supporting the member within a gas-evacuable enclosure, with a first surface thereof facing downwardly; supporting the flexible sheet on an extensible membrane mounted in the enclosure and spaced from said one surface of the member, with the peripheral edges of the sheet being free to be moved by the membrane; evacuating the space between the surface and the extensible membrane while maintaining the membrane spaced from said first surface; then establishing a pressure differential between the side of the membrane facing said first surface and the side of the membrane remote from the surface whereby the membrane first lifts the central portion of the flexible sheet into engagement with a portion of the surface and thereafter progressively presses the sheet outwardly onto the first surface; and removing the peripheral support for the member as the extensible membrane extends near the periphery of the member and the member is supported by the membrane.
Claim 28
Independent Claim
164 words
A method of laminating a flexible sheet to a member comprising: peripherally supporting the member within a gas-evacuable enclosure, with a first surface thereof facing downwardly; supporting the flexible sheet on an extensible membrane mounted in the enclosure and spaced from said one surface of the member, with the peripheral edges of the sheet being free to be moved by the membrane; evacuating the space between the surface and the extensible membrane while maintaining the membrane spaced from said first surface; then establishing a pressure differential between the side of the membrane facing said first surface and the side of the membrane remote from the surface whereby the membrane first lifts the central portion of the flexible sheet into engagement with a portion of the surface and thereafter progressively presses the sheet outwardly onto the first surface; and removing the peripheral support for the member as the extensible membrane extends near the periphery of the member and the member is supported by the membrane.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-30 | 1982-10-30 | 1983-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-30 | 1986-10-30 | 1987-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-30 | 1990-10-30 | 1991-05-01 | $7700.00 | Window Closed / Lapsed |