Patent US3632984A successfully refreshed from Google Patents.
US3632984A
Expired / Lapsed
US
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Apparatus for reproduction machines
Assignee: Canadian Thermo Images Ltd
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Filing: 1969-09-15
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Granted: 1972-01-04
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Expires: 1989-09-15
Abstract
Abstract Apparatus for development of heat-sensitive images on sheets embodying a hollow, thin-walled, heat-conducting, rotatable cylinder or drum and a heat-resistant, perforated, flexible stationary belt wrapped about the cylindrical surface of said cylinder or drum with its bight portion in light, sliding contact therewith.
Inventors
- 👤 Philip J Brownscombe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:25
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/0095
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
79 words
Apparatus for the development of heat-sensitive copy sheets comprising a hollow, thin-walled, rotatable cylinder nested in the bight of a flexible band wrapped about a portion of the surface of said cylinder, said band having a plurality of small perforations of a predetermined pattern extendiNg over at least the portion of said band forming said bight; means for holding said band in a fixed position as said cylinder is rotated; and means for heating the wall of said cylinder.
Claim 2
Dependent Claim
79 words
Apparatus for the development of heat-sensitive copy sheets comprising a hollow, thin-walled, rotatable cylinder nested in the bight of a flexible band wrapped about a portion of the surface of said cylinder, said band having a plurality of small perforations of a predetermined pattern extendiNg over at least the portion of said band forming said bight; means for holding said band in a fixed position as said cylinder is rotated; and means for heating the wall of said cylinder.
Claim 3
Dependent Claim
33 words
Apparatus as in claim 1 wherein said perforations have respective diameters in the range of 0.03 to 0.1 inch and are sufficiently closely spaced to provide 100 to 200 perforations per square inch.
Claim 4
Dependent Claim
16 words
Apparatus as in claim 2 wherein said band is made of woven fiberglass coated with polytetrafluoroethylene.
Claim 5
Dependent Claim
23 words
Apparatus as in claim 1, and spring means attached to one end of said band to maintain a light tension in said band.
Claim 6
Dependent Claim
28 words
Apparatus as in claim 4 wherein said one end of said band has a rigid member extending thereacross, and said spring means being attached to said rigid member.
Claim 7
Dependent Claim
33 words
Apparatus as in claim 5 wherein the opposite end of said band is fixedly attached to a rigid bracket extending thereacross and a plurality of thin guide fingers extending outwardly from said bracket.
References Cited (Backward Citations)
US2588966A
Cited
US3012141A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |