US3893245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photocopying apparatus
Assignee: Canon Inc
•
Filing: 1973-03-12
•
Granted: 1975-07-08
•
Expires: 1993-03-12
Abstract
Abstract In a photocopying apparatus having a device for liquid developing a copy and of the type in which the copy is guided over a heating plate while being passed through a sealed chamber, one or more endless belts, preferably of velvet or fur, moved around two rollers are provided to transport the copy and also to urge the copy against the heating plate.
Inventors
- 👤 Wilhelm Knechtel
- 👤 Gerhard Petersdorf
- 👤 Winfried Sandner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:52
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/11; G03D; G03D15/00; G03D15/02; G03D15/022; G03D15/027
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
186 words
In a liquid development type copying machine including a sealed chamber having a plurality of walls through which a copy material having a developed image thereon is transported for drying said copy material, said sealed chamber including inlet and outlet ports, stationary heating plate means, and means to transport said copy material from said inlet port over said heating plate means to said outlet port, said transport means comprising at least a pair of driven rollers and endless belt means movably extended around said pair of driven rollers, said endless belt means having a fluffy outer surface, the improvement comprising said heating plate means forming one of said walls of said sealed chamber, and said endless belt means sealing the inlet and outlet ports of said sealed chamber, by contacting a portion of said walls, and further comprising means to press said endless belt means against a stationary surface of said stationary heating plate means, wherein said copy material transported through said sealed chamber is uniformly interposed between and in uniform contact with each of said fluffy surface and said stationary surface of said heating plate.
Claim 2
Dependent Claim
186 words
In a liquid development type copying machine including a sealed chamber having a plurality of walls through which a copy material having a developed image thereon is transported for drying said copy material, said sealed chamber including inlet and outlet ports, stationary heating plate means, and means to transport said copy material from said inlet port over said heating plate means to said outlet port, said transport means comprising at least a pair of driven rollers and endless belt means movably extended around said pair of driven rollers, said endless belt means having a fluffy outer surface, the improvement comprising said heating plate means forming one of said walls of said sealed chamber, and said endless belt means sealing the inlet and outlet ports of said sealed chamber, by contacting a portion of said walls, and further comprising means to press said endless belt means against a stationary surface of said stationary heating plate means, wherein said copy material transported through said sealed chamber is uniformly interposed between and in uniform contact with each of said fluffy surface and said stationary surface of said heating plate.
Claim 3
Dependent Claim
22 words
A liquid development type copying machine according to claim 1, wherein said pressing means is a perforated member of light weight metal.
Claim 4
Dependent Claim
35 words
A liquid development type copying machine according to claim 1, wherein said pressing means imparts pressing force by its own weight, and further comprising stop means tO maintain said pressing means at a predetermined position.
Claim 5
Dependent Claim
31 words
A liquid development type copying machine according to claim 1, wherein said heating plate is curved into a convex shape with respect to said fluffy surface of said endless belt means.
References Cited (Backward Citations)
US1943874A
Cited
US2046047A
Cited
US2933825A
Cited
US3071866A
Cited
US3378430A
Cited
US3374769A
Cited
US3435751A
Cited
US3448970A
Cited
US3668786A
Cited
US3657068A
Cited
US3659348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |