Patent US4091580A successfully refreshed from Google Patents.
US4091580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for holding and cutting sheet glass
Assignee: Timex Group USA Inc
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Filing: 1977-06-29
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Granted: 1978-05-30
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Expires: 1997-06-29
Abstract
Abstract Sheet glass is held for cutting with multiple rotary blades by freezing to a supporting base plate with a liquid, preferably water. The same liquid at a temperature just above freezing temperature is used to cool the blades during cutting, and forms a frozen scale which protects the glass and prevents chipping. After cutting, the liquid is allowed to thaw and releases the pieces without damage or need of special cleaning.
Inventors
- 👤 William Lee Oates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:58
CPC Classifications
B; B23; B23Q; B23Q3/00; B23Q3/02; B23Q3/06; B23Q3/08; B23Q3/086; B23D; B23D59/00; B23D59/02; B23Q11/00; B23Q11/10; B23Q11/1038; B23Q11/1053; B24; B24B; B24B55/00; B24B55/02; B28; B28D; B28D7/00; B28D7/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49998; Y10T83/00; Y10T83/04; Y10T83/0405; Y10T83/041; Y10T83/0443; Y10T83/263; Y10T83/283; Y10T83/293; Y10T83/748
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
102 words
A process for holding and cutting sheet glass, comprising the steps of: cooling a glass sheet and a base member together with a liquid to freeze them together, providing a cooling fluid comprising the same liquid at a temperature just above the freezing point of the liquid, flowing said liquid over the sheet glass to cause it to form a frozen scale completely enclosing the top surface of the glass, cutting said glass sheet with a rotary blade, while cooling the blade and glass sheet with the same liquid, and allowing the liquid to thaw and removing the pieces of cut glass.
Claim 2
Dependent Claim
102 words
A process for holding and cutting sheet glass, comprising the steps of: cooling a glass sheet and a base member together with a liquid to freeze them together, providing a cooling fluid comprising the same liquid at a temperature just above the freezing point of the liquid, flowing said liquid over the sheet glass to cause it to form a frozen scale completely enclosing the top surface of the glass, cutting said glass sheet with a rotary blade, while cooling the blade and glass sheet with the same liquid, and allowing the liquid to thaw and removing the pieces of cut glass.
Claim 3
Dependent Claim
11 words
The combination according to claim 1, wherein the liquid is water.
Claim 4
Dependent Claim
19 words
The combination according to claim 1, wherein said rotary blades perform a multiple gang cut of the glass sheet.
Claim 5
Dependent Claim
30 words
The combination according to claim 1, wherein said base member is selected from the group consisting of brass, aluminum, titanium, Kovar, and stainless steel, and wherein the liquid is water.
Claim 6
Dependent Claim
27 words
The combination according to claim 1 wherein an intermediate liquid retaining member is interposed between the base member and the glass to retain the liquid during freezing.
Claim 7
Dependent Claim
28 words
The combination according to claim 1, wherein the base member and glass sheet are placed together in the presence of water and cooled by placing on dry ice.
References Cited (Backward Citations)
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US3218896A
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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) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |