US4618247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoreceptor pre-initializing electrophotographic copying machine
Assignee: Sharp Corp
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Filing: 1984-12-06
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Granted: 1986-10-21
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Expires: 2004-12-06
Abstract
Abstract An electrophotographic copying machine comprises a copy-image forming member for enabling the machine to conduct a copy operation to provide a toner image onto a copy paper, a heat-fixing element responsive to the copy-forming member for heat-fixing the toner image to the copied paper, a heater for heating the heat-fixing element up to a toner-fixing temperature of fixing the toner image on the copied paper, a detection member for detecting that the heat-fixing element is prior to the toner temperature, and an initializing member responsive to the detection member for starting to initialize a photoreceptor, so that the copy-image forming member and the heat-fixing member follow the operation of the initializing member to thereby start the copy operation.
Inventors
- 👤 Masaru Tsuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:53
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
130 words
A photoreceptor initialization device in an electrophotographic copying machine, said device comprising: copy-image forming means for enabling said copying machine to perform a copying operation by providing a toner image onto a copy paper; heat-fixing means for heat-fixing said toner image onto said copy paper in said copying operation; means for heating said heat-fixing means to a predetermined toner fixing temperature; detecting means for determining that said heat-fixing means is being heated prior to said heat-fixing means reaching said predetermined toner fixing temperature; means for initializing the photoreceptor in response to said detecting means determining that said heat-fixing means is being heated; said copy-image forming means for enabling said copying machine being activated subsequent to initializing the photoreceptor and prior to said heat-fixing means reaching said predetermined toner fixing temperature.
Claim 2
Dependent Claim
130 words
A photoreceptor initialization device in an electrophotographic copying machine, said device comprising: copy-image forming means for enabling said copying machine to perform a copying operation by providing a toner image onto a copy paper; heat-fixing means for heat-fixing said toner image onto said copy paper in said copying operation; means for heating said heat-fixing means to a predetermined toner fixing temperature; detecting means for determining that said heat-fixing means is being heated prior to said heat-fixing means reaching said predetermined toner fixing temperature; means for initializing the photoreceptor in response to said detecting means determining that said heat-fixing means is being heated; said copy-image forming means for enabling said copying machine being activated subsequent to initializing the photoreceptor and prior to said heat-fixing means reaching said predetermined toner fixing temperature.
Claim 3
Dependent Claim
61 words
The of claim 1, wherein said detecting means comprises a temperature detection element for sensing the temperature of said heat-fixing means, comparator means for comparing the sensed temperature of said heat-fixing means with first and second predetermined temperatures and providing output signals representative thereof, and a microprocessor, said microprocessor including a calculating circuit, a counting circuit, and a pulse outputting circuit.
Claim 4
Dependent Claim
41 words
The device of claim 1, wherein said predetermined toner-fixing temperature is about 180 degrees Centigrade, said means for initializing the photoreceptor being activated when said detecting means determines that said heat-fixing means is at a temperature of about 165 degrees Centigrade.
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) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |