US3977782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Warmth keeping method for copying machine
Assignee: Canon Inc
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Filing: 1974-12-12
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Granted: 1976-08-31
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Expires: 1994-12-12
Abstract
Abstract There is disclosed a method of maintaining at a desired level the temperature of components in a copying machine which is in its idle state. An electric power is supplied members in the machine having an impedance component after the copying operation has been stopped. The voltage of the power must be set at a value lower than the rated voltage of the members.
Inventors
- 👤 Hisashi Sakamaki
- 👤 Yoshimasa Kimura
- 👤 Toshio Honma
- 👤 Tsuneki Inuzuka
- 👤 Katsushi Furuichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:00
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
A method of maintaining a copy processing component of a non-operating copying machine in a state such that copies may be readily obtained, wherein the machine includes a plurality of members, other than said component, which generate heat while having respective operating functions other than the generation of heat when energized at a particular rated voltage during operation of the machine, said method comprising the steps of: a. maintaining said component at a predetermined temperature by applying a voltage to at least one of the members; and b. supplying said applied voltage at a value lower than said rated voltage while the machine is in a non-operating condition so that said at least one member produces heat.
Claim 2
Independent Claim
117 words
A method of maintaining a copy processing component of a non-operating copying machine in a state such that copies may be readily obtained, wherein the machine includes a plurality of members, other than said component, which generate heat while having respective operating functions other than the generation of heat when energized at a particular rated voltage during operation of the machine, said method comprising the steps of: a. maintaining said component at a predetermined temperature by applying a voltage to at least one of the members; and b. supplying said applied voltage at a value lower than said rated voltage while the machine is in a non-operating condition so that said at least one member produces heat.
Claim 3
Dependent Claim
26 words
A method in accordance with claim 1, further including the step of controlling the application of said voltage in relation to the temperature within said machine.
Claim 4
Dependent Claim
25 words
A method in accordance with claim 1, further including the step of deriving said applied voltage from a low voltage circuit source in said machine.
Claim 5
Dependent Claim
46 words
A method in accordance with claim 1, wherein said machine includes a reservoir for liquid developer and a motor for use in circulating the liquid developer, and wherein said step of applying said voltage to a member is performed by applying said voltage to said motor.
Claim 6
Independent Claim
117 words
A method of maintaining a copy processing component of a non-operating copying machine in a state such that copies may be readily obtained, said machine including at least one member, other than said component, having an electrical winding with an associated rated voltage, wherein said winding generates heat while having an operating function other than the generation of heat during operation of the machine, said method comprising the steps of: a. maintaining said component at a predetermined temperature by applying a voltage to a said winding; and b. supplying said applied voltage at a value lower than said rated voltage while the machine is in a non-operating condition so that said at least one member produces heat.
Claim 7
Independent Claim
117 words
A method of maintaining a copy processing component of a non-operating copying machine in a state such that copies may be readily obtained, said machine including at least one member, other than said component, having an electrical winding with an associated rated voltage, wherein said winding generates heat while having an operating function other than the generation of heat during operation of the machine, said method comprising the steps of: a. maintaining said component at a predetermined temperature by applying a voltage to a said winding; and b. supplying said applied voltage at a value lower than said rated voltage while the machine is in a non-operating condition so that said at least one member produces heat.
Claim 8
Dependent Claim
49 words
A method in accordance with claim 5 wherein said copy machine is of the type having a photosensitive drum, a reservoir for liquid developer and a corona discharger, and wherein said member is disposed in the vicinity of at least one of said drum, said developer or said discharger.
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) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |