US4300933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing automotive windows by coating a scored substrate
Assignee: PPG Industries Ohio Inc
•
Filing: 1980-05-27
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Granted: 1981-11-17
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Expires: 2000-05-27
Abstract
Abstract An automotive back window for flush glazing is manufactured by subsurface scoring a glass sheet to define an automotive back window blank in the sheet surrounded by sheet supporting glass portions. An endless band of ceramic paste is silk screened over the score as screen portions beyond the screen pattern are supported by the supporting glass portions. The sheet is thereafter baked to remove volatiles in the paste, the supporting glass portions removed from the blank and the blank having the baked pattern is bent and/or tempered.
Inventors
- 👤 Donald D. Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:13
CPC Classifications
C; C03; C03B; C03B33/00; C03B33/02; C03B33/04; Y; Y10; Y10T; Y10T83/00; Y10T83/02; Y10T83/0333; Y10T83/0341
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
74 words
A method of making an automotive window for flush glazing, comprising the steps of: scoring a sheet within its edges to define an automotive window blank having supporting sheet portions beyond the periphery of said window blank; silk screening a pattern on the sheet; supporting screen portions adjacent and beyond the pattern by the supporting sheet portions while practicing said silk screening step; and removing the supporting sheet portions from the automotive window blank.
Claim 2
Independent Claim
74 words
A method of making an automotive window for flush glazing, comprising the steps of: scoring a sheet within its edges to define an automotive window blank having supporting sheet portions beyond the periphery of said window blank; silk screening a pattern on the sheet; supporting screen portions adjacent and beyond the pattern by the supporting sheet portions while practicing said silk screening step; and removing the supporting sheet portions from the automotive window blank.
Claim 3
Dependent Claim
24 words
The method as set forth in claim 1 wherein the pattern is an endless ceramic paste adjacent peripheral edge portions of the window blank.
Claim 4
Dependent Claim
36 words
The method as set forth in claim 2 wherein the ceramic paste has volatiles therein and further including a step of: heating the sheet to remove the volatiles in the paste before practicing said removal step.
Claim 5
Dependent Claim
37 words
The method as set forth in claim 2 wherein the ceramic paste has volatiles therein and further including a step of: heating the window blank to remove the volatiles in the paste after practicing said removal step.
Claim 6
Dependent Claim
23 words
The method as set forth in claim 1 wherein said scoring step imposes a score that is essentially free of wing and/or spall.
Claim 7
Dependent Claim
32 words
The method as set forth in claim 1, 2, 3, 4 or 5, after the silk screening step, further including the step of tempering the automotive blank to provide the automotive window.
Claim 8
Dependent Claim
33 words
The method as set forth in claim 1, 2, 3, 4 or 5, after the silk screen step further including the step of bending the automotive window blank to provide an automotive window.
Claim 9
Dependent Claim
26 words
The method as set forth in claim 6 further including the step of: edging the cut edge of the window blank before practicing said tempering step.
Claim 10
Dependent Claim
25 words
The method as set forth in claim 7 further including the step of: edging the cut edge of the blank before practicing said bending step.
Claim 11
Dependent Claim
26 words
The method as set forth in claim 2 wherein the score outlines the automotive blank in the sheet and the endless band pattern overlays the score.
References Cited (Backward Citations)
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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) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |