US3723083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Textured conveyor roll and method of finishing the same
Assignee: Pilkington North America Inc
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Filing: 1970-12-23
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Granted: 1973-03-27
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Expires: 1990-12-23
Abstract
Abstract The conveyor roll disclosed is provided with a special textured surface finish and is of particular utility for support and conveying glass sheets during heating thereof from room temperature to a relatively high temperature, said textured surface finish reducing the area of contact between the roll and glass sheets, thereby lowering the rate of heat transfer and lessening the liability of breakage of the glass.
Inventors
- 👤 G Ritter
- 👤 R King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:55
CPC Classifications
B; B65; B65G; B65G39/00; B65G39/02; C; C03; C03B; C03B35/00; C03B35/14; C03B35/16; C03B35/18; C03B35/181; B65G2207/00; B65G2207/22; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49544; Y10T29/4956
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
In a method of heating glass sheets from ambient temperature to a relatively high temperature while conveying said sheets to a station for subsequent processing, the improvement comprising the steps of conveying said sheets through a heating furnace on cylindrical metallic rolls of stainless steel, said rolls having a glass contacting surface with a uniform 80-120 micro inch textured finish including generally circular dents depressed below the original surface of saId rolls and rims of metal surrounding said dents displaced outwardly and upwardly from said dents and extending above said original surface, the tops of said rims being rounded off, and applying heat to said sheets as they advance through said furnace until said sheets reach said relatively high temperature.
Claim 2
Dependent Claim
161 words
In apparatus for heating glass sheets from ambient temperature to a relatively high temperature, the improvement comprising, in combination, top and bottom walls and opposite side walls defining a tunnel-type furnace, heaters in at least some of said walls for heating said glass sheets within said furnace, a plurality of horizontally spaced cylindrical rolls extending transversely within said furnace upon which said glass sheets are conveyed through said furnace, and a glass contacting surface upon said rolls comprising a uniform 80-120 microinch textured finish including generally circular dents depressed below the original surface of said rolls and rims of metal surrounding said dents displaced outwardly and upwardly from said dents and extending above said original surface, the tops of said rims being rounded off, whereby minimal contact of said sheets with said rolls resulting from the support of said sheet by said tops of said rims inhibits development of excessive thermal shock in said glass sheets as said sheets are heated.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |