Patent US3853525A successfully refreshed from Google Patents.
US3853525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass sheet conveying and supporting rolls, and apparatus employing such rolls
Assignee: Individual
•
Filing: 1973-08-02
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Granted: 1974-12-10
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Expires: 1993-08-02
Abstract
Abstract Disclosed is a roll useful in glass manufacturing for supporting and conveying at elevated temperatures solid glass sheeting. The roll contains boron nitride in its material supporting surface which has been found to prolong roll life and to minimize deformation of and adhesion to the surface of the glass sheeting engaging the roll.
Inventors
- 👤 H Gorman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:57
CPC Classifications
C; C03; C03B; C03B35/00; C03B35/14; C03B35/16; C03B35/18; C03B35/181; C03B35/189
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
33 words
A ROLL, USEFUL IN GLASS MANUFACTURING AND ESPECIALLY ADAPTED FOR SUPPORTING AND CONVEYING AT ELEVATED TEMPERATURE FLAT GLASS SHEETING, SAID ROLL HAVING AN ASBESTOS SURFACE WITH A COATING OF BORON NITRIDE ADHERED THERETO.
Claim 2
Dependent Claim
33 words
A ROLL, USEFUL IN GLASS MANUFACTURING AND ESPECIALLY ADAPTED FOR SUPPORTING AND CONVEYING AT ELEVATED TEMPERATURE FLAT GLASS SHEETING, SAID ROLL HAVING AN ASBESTOS SURFACE WITH A COATING OF BORON NITRIDE ADHERED THERETO.
Claim 3
Dependent Claim
8 words
A lehr roll as described in claim 1.
Claim 4
Dependent Claim
28 words
A take-off roll as described in claim 1 for a float glass-producing line for use adjacent a bath of molten metal to remove a ribbon of glass therefrom.
Claim 5
Dependent Claim
19 words
The roll of claim 1 in which the boron nitride coating is from 1 to 10 mils in thickness.
Claim 6
Dependent Claim
29 words
The roll of claim 1 in which the asbestos is selected from the class consisting of chrysolite asbestos, anthophyllite asbestos, amosite asbestos, tremolite asbestos, actinolite asbestos and mixtures thereof.
Claim 7
Independent Claim
29 words
An apparatus for the treatment of hot glass sheeting which includes as a principal supporting and conveying means for said sheeting a plurality of rolls as described in claim.
Claim 8
Dependent Claim
18 words
The roll of claim 1 in which the asbestos is at least 30 percent by weight anthophyllite asbestos.
Claim 9
Dependent Claim
10 words
The apparatus of claim 6 which is an annealing lehr.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |