US3740524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for cutting curved patterns in glass sheets disposed on a fluid air support
Assignee: PPG Industries Inc
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Filing: 1971-03-26
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Granted: 1973-06-19
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Expires: 1991-03-26
Abstract
Abstract A pattern-cutting apparatus for glass comprising an air-support table periodically supplied with compressed air for supporting the glass above the table, a source of thermal energy disposed above and below the glass sheet for inducing a fracture in the glass, and a motor and turning mechanism for turning the glass between the energy sources so as to describe a pattern in the glass sheet when it rotates between the sources and producing a pattern-cut piece of glass when the glass is severed along the fracture line.
Inventors
- 👤 J Dahlberg
- 👤 T Dear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:43
CPC Classifications
C; C03; C03B; C03B33/00; C03B33/09; C03B33/02; C03B33/04; Y; Y10; Y10S; Y10S65/00; Y10S65/04; Y10T; Y10T225/00; Y10T225/30; Y10T225/307; Y10T225/321; Y10T225/325; Y10T83/00; Y10T83/647; Y10T83/6472
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
130 words
A method for cutting glass comprising: providing a piece of glass, providing a fluid support to vertically support said piece of glass solely on said fluid support, said piece of glass having opposed major surfaces which are in a generally horizontal position when said piece of glass is so supported, disposing a means for cutting said piece of glass in vertically spaced relation to said fluid support, engaging said piece of glass with contact means, and moving said piece of glass with said contact means past said means for cutting said piece of glass while said piece of glass is vertically supported solely on said fluid support so that said piece of glass is cut along a predetermined path of cut by said means for cutting said piece of glass.
Claim 2
Independent Claim
130 words
A method for cutting glass comprising: providing a piece of glass, providing a fluid support to vertically support said piece of glass solely on said fluid support, said piece of glass having opposed major surfaces which are in a generally horizontal position when said piece of glass is so supported, disposing a means for cutting said piece of glass in vertically spaced relation to said fluid support, engaging said piece of glass with contact means, and moving said piece of glass with said contact means past said means for cutting said piece of glass while said piece of glass is vertically supported solely on said fluid support so that said piece of glass is cut along a predetermined path of cut by said means for cutting said piece of glass.
Claim 3
Dependent Claim
31 words
The method of claim 1 which comprises providing said fluid support by applying air under pressure from a plenum section to one of said major surfaces of said piece of glass.
Claim 4
Dependent Claim
23 words
The method of claim 2 which comprises engaging the other of said major surfaces of said piece oF glass with said contact means.
Claim 5
Dependent Claim
22 words
The method of claim 3 which comprises moving said piece of glass with said contact means along a curvilinear path of cut.
Claim 6
Dependent Claim
19 words
The method of claim 3 which comprises cutting said piece of glass by the application thereto of thermal energy.
Claim 7
Dependent Claim
31 words
The method of claim 5 which comprises applying said thermal energy from a thermal source spaced from said piece of glass and concentrating said thermal energy on said path of cut.
Claim 8
Dependent Claim
19 words
The method of claim 4 which comprises cutting said piece of glass by the application thereto of thermal energy.
Claim 9
Dependent Claim
31 words
The method of claim 7 which comprises applying said thermal energy from a thermal source spaced from said piece of glass and concentrating said thermal energy on said path of cut.
References Cited (Backward Citations)
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Cited
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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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |