US3223498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treatment of conveyed glass and apparatus therefor
Assignee: PPG Industries Inc
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Filing: 1962-02-27
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Granted: 1965-12-14
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Expires: 1982-02-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles R Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:24
CPC Classifications
C; C03; C03B; C03B35/00; C03B35/14; C03B35/16; C03B35/18; C03B35/189; C03B29/00; C03B29/04; C03B29/06; C03B29/08; C03B29/12; C03B35/22; C03B35/24; C03B35/243; C03B2225/00; C03B2225/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
140 words
IN A METHOD OF SUPPORTING AND CONVEYING A GLASS SHEET, THE IMPROVEMENT WHICH COMPRISES: (A) DISPOSING THE GLASS UPON A PORTION OF A PLURALITY OF LATERALLY SPACED ROLLING SUPPORTS HAVING DISCRETE SPACES THEREBETWEEN, WHICH SUPPORTS DEFINE A LONGITUDINALLY EXTENDING PATH OF MOVEMENT OF SAID GLASS, (B) SUPPLYING GAS IN SAID DISCRETE SPACES AT A PRESSURE SUFFICIENT TO PARTIALLY SUPPORT THE GLASS, (C) HEATING ACID GLASS AT A DEFORMATION TEMPERATURE WHILE SO SUPPORTED, (D) MOVING SAID GLASS IN SAID PATH AS SAID ROLLING SUPPORTS THEREUNDER ROTATE, (E) MAINTAINING THE GASEOUS PRESSURE IN SAID DISCRETE SPACES (1) HIGH ENOUGH TO PARTIALLY SUPPORT THE GLASS DURING ITS MOVEMENT THEREOVER BUT (2) LOW ENOUGH TO SUPPORT THE GLASS IN FRICTIONAL CONTACT WITH THE ROLLING SUPPORTS WITH WHICH THE GLASS IS ENGAGED, AND (F) MAINTAINING THE GLASS AT DEFORMATION TEMPERATURE WHILE IT IS SO SUPPORTED.
Claim 2
Dependent Claim
140 words
IN A METHOD OF SUPPORTING AND CONVEYING A GLASS SHEET, THE IMPROVEMENT WHICH COMPRISES: (A) DISPOSING THE GLASS UPON A PORTION OF A PLURALITY OF LATERALLY SPACED ROLLING SUPPORTS HAVING DISCRETE SPACES THEREBETWEEN, WHICH SUPPORTS DEFINE A LONGITUDINALLY EXTENDING PATH OF MOVEMENT OF SAID GLASS, (B) SUPPLYING GAS IN SAID DISCRETE SPACES AT A PRESSURE SUFFICIENT TO PARTIALLY SUPPORT THE GLASS, (C) HEATING ACID GLASS AT A DEFORMATION TEMPERATURE WHILE SO SUPPORTED, (D) MOVING SAID GLASS IN SAID PATH AS SAID ROLLING SUPPORTS THEREUNDER ROTATE, (E) MAINTAINING THE GASEOUS PRESSURE IN SAID DISCRETE SPACES (1) HIGH ENOUGH TO PARTIALLY SUPPORT THE GLASS DURING ITS MOVEMENT THEREOVER BUT (2) LOW ENOUGH TO SUPPORT THE GLASS IN FRICTIONAL CONTACT WITH THE ROLLING SUPPORTS WITH WHICH THE GLASS IS ENGAGED, AND (F) MAINTAINING THE GLASS AT DEFORMATION TEMPERATURE WHILE IT IS SO SUPPORTED.
Claim 3
Dependent Claim
153 words
APPARATUS FOR SUPPORTING AND CONVEYING A HEAT DEFORMABLE SHEET WHICH COMPRISES: (A) A PLURALITY OF SPACED CONVEYING ROLLS DEFINING A PATH, THE TOPS OF SAID ROLLS DEFINING A SUPPORT LEVEL; (B) AT LEAST ONE HEAT RESISTANT MEMBER BETWEEN A PAIR OF ADJACENT CONVEYING ROLLS AND DISPOSED BELOW SAID SUPPORT LEVEL, THE HEAT RESISTANT MEMBER HAVING AN UPPER SURFACE DISPOSED A SHORT DISTANCE BELOW SIAD SUPPORT LEVEL PROVIDING A PASSAGEWAY FOR HOT GAS ALONG SAID SUPPORT LEVEL IN TH EDIRECTION OF SAID PATH; (C) MEANS TO SUPPLY HOT GAS AT ONE END OF THE PASSAGEWAY IN A DIRECTION TOWARD SIAD SUPORT LEVEL; (D) MEANS TO EXHAUST GAS FROM THE OTHER END OF SAID PASSAGEWAY; AND (E) MEANS TO RESTRAIN THE EXHAUST OF SAID GAS WHEREBY WHEN THE SHEET IS DISPOSED ON THE CONVEYING ROLLS THE HOT GAS FLOWS ALONG EACH SAID PASSAGEWAY UNDER SAID SHEET TO APPLY A SUPPORT PRESSURE TO THE UNDERSIDE THEREOF.
Claim 4
Dependent Claim
153 words
APPARATUS FOR SUPPORTING AND CONVEYING A HEAT DEFORMABLE SHEET WHICH COMPRISES: (A) A PLURALITY OF SPACED CONVEYING ROLLS DEFINING A PATH, THE TOPS OF SAID ROLLS DEFINING A SUPPORT LEVEL; (B) AT LEAST ONE HEAT RESISTANT MEMBER BETWEEN A PAIR OF ADJACENT CONVEYING ROLLS AND DISPOSED BELOW SAID SUPPORT LEVEL, THE HEAT RESISTANT MEMBER HAVING AN UPPER SURFACE DISPOSED A SHORT DISTANCE BELOW SIAD SUPPORT LEVEL PROVIDING A PASSAGEWAY FOR HOT GAS ALONG SAID SUPPORT LEVEL IN TH EDIRECTION OF SAID PATH; (C) MEANS TO SUPPLY HOT GAS AT ONE END OF THE PASSAGEWAY IN A DIRECTION TOWARD SIAD SUPORT LEVEL; (D) MEANS TO EXHAUST GAS FROM THE OTHER END OF SAID PASSAGEWAY; AND (E) MEANS TO RESTRAIN THE EXHAUST OF SAID GAS WHEREBY WHEN THE SHEET IS DISPOSED ON THE CONVEYING ROLLS THE HOT GAS FLOWS ALONG EACH SAID PASSAGEWAY UNDER SAID SHEET TO APPLY A SUPPORT PRESSURE TO THE UNDERSIDE THEREOF.
References Cited (Backward Citations)
US1622817A
Cited
US756600A
Cited
US820205A
Cited
GB356676A
Cited
US2042610A
Cited
US2505103A
Cited
US2848820A
Cited
US3062520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |