US4291824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-aligning method for scoring fracturable material
Assignee: PPG Industries Inc
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Filing: 1979-11-13
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Granted: 1981-09-29
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Expires: 1999-11-13
Abstract
Abstract An apparatus for scoring a glass sheet includes a scoring wheel rotatably mounted to one end of a shaft mounted in a rod end ball joint and a spring acting on the other end of the shaft to urge the wheel toward a sheet movement path under a predetermined force. The glass sheet is advanced along the path under the scoring wheel to urge the scoring wheel against the biasing action of the spring. The axis of the scoring wheel is aligned in a plane normal and transverse to the movement path by the motion of the glass sheet as it advances under the scoring wheel.
Inventors
- 👤 Robert P. DeTorre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:35
CPC Classifications
C; C03; C03B; C03B33/00; C03B33/10; C03B33/02; C03B33/023; C03B33/027; Y; Y10; Y10T; Y10T225/00; Y10T225/10; Y10T225/12; Y10T83/00; Y10T83/02; Y10T83/0333; Y10T83/0341; Y10T83/0348; Y10T83/0363; Y10T83/037; Y10T83/0385
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
56 words
A method of scoring a sheet of fracturable material, comprising the steps of: providing an elongated member having scoring means; universally pivoting the elongated member; displacing the sheet and scoring means relative to one another; while biasing the scoring means against the sheet to score the sheet and maintain the scoring means in an upright position.
Claim 2
Independent Claim
56 words
A method of scoring a sheet of fracturable material, comprising the steps of: providing an elongated member having scoring means; universally pivoting the elongated member; displacing the sheet and scoring means relative to one another; while biasing the scoring means against the sheet to score the sheet and maintain the scoring means in an upright position.
Claim 3
Dependent Claim
46 words
The method as set forth in claim 1 further including the steps of: displacing the elongated member and scoring means toward the sheet prior to practicing said biasing step; and displacing the elongated member and scoring means away from the sheet after practicing said biasing step.
Claim 4
Dependent Claim
20 words
The method as set forth in claim 1 further including the step of propagating the score to sever the sheet.
Claim 5
Dependent Claim
24 words
The method as set forth in claim 1 wherein the fracturable material is selected from the group consisting of glasses, glass-ceramics, ceramics and plastics.
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) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |