US3677632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Environment control device for electrophotographic apparatus
Assignee: Eastman Kodak Co
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Filing: 1970-09-10
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Granted: 1972-07-18
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Expires: 1990-09-10
Abstract
Abstract Moisture content of receiver material is controlled within an electrophotographic apparatus by providing one or more heaters in proximity to a supply of receiver material which heaters heat the surrounding air in response to a humidistat control to keep the humidity from exceeding a predetermined level. One of the heaters is arranged to heat both the supply of receiver material and a paper feed path along which the material is fed from the supply. Thus, paper which remains in the feed path when the machine is not operating will be maintained at the correct moisture content.
Inventors
- 👤 William A Macdonald Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:23
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6597; G05; G05D; G05D22/00; G05D22/02; G03G2215/00; G03G2215/00362; G03G2215/00367; G03G2215/00379; G03G2215/00383; G03G2215/00405; G03G2215/00417; G03G2215/00421; G03G2215/00443; G03G2215/00518; G03G2215/00535; G03G2215/00544; G03G2215/00548; G03G2215/00666; G03G2215/00717; G03G2215/00776
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
91 words
A humidity control device, having an enabled and disabled condition, for use in an electrophotographic apparatus used under varying relative humidity conditions for controlling the moisture content of photoconductive receiver material, said control device including: a support for the supply of receiver material; means defining a feed path for feeding the receiver material from said support; first controllable means for simultaneously heating the supply on said support and for heating said feed path; and means responsive to operation of said electrophotographic apparatus to disable said humidity control device during such operation.
Claim 2
Dependent Claim
91 words
A humidity control device, having an enabled and disabled condition, for use in an electrophotographic apparatus used under varying relative humidity conditions for controlling the moisture content of photoconductive receiver material, said control device including: a support for the supply of receiver material; means defining a feed path for feeding the receiver material from said support; first controllable means for simultaneously heating the supply on said support and for heating said feed path; and means responsive to operation of said electrophotographic apparatus to disable said humidity control device during such operation.
Claim 3
Dependent Claim
177 words
A humidity control device, having an enabled and disabled condition, for use in an electrophotographic apparatus used under varying relative humidity conditions for controlling the moisture content of photoconductive receiver material, said control device including: means for rotatably supporting a supply roll of receiver material; means defining a feed path for feeding the photoconductive material from said supply roll; a first baffle plate mounted between said support and said feed path defining means for heating both said supply roll and said heat path; a first controllable heater mounted on said first baffle for heating said first baffle plate; a first thermostat mounted on said first baffle plate and connected to said heater for controlling the temperature of said first baffle plate; a second bAffle plate spaced from said first baffle plate with said support therebetween; a second controllable heating means mounted on said second baffle plate for heating said second baffle plate; a second thermostat mounted on said second baffle plate and connected to said second heating means for controlling the temperature of said second baffle plate.
Claim 4
Dependent Claim
177 words
A humidity control device, having an enabled and disabled condition, for use in an electrophotographic apparatus used under varying relative humidity conditions for controlling the moisture content of photoconductive receiver material, said control device including: means for rotatably supporting a supply roll of receiver material; means defining a feed path for feeding the photoconductive material from said supply roll; a first baffle plate mounted between said support and said feed path defining means for heating both said supply roll and said heat path; a first controllable heater mounted on said first baffle for heating said first baffle plate; a first thermostat mounted on said first baffle plate and connected to said heater for controlling the temperature of said first baffle plate; a second bAffle plate spaced from said first baffle plate with said support therebetween; a second controllable heating means mounted on said second baffle plate for heating said second baffle plate; a second thermostat mounted on said second baffle plate and connected to said second heating means for controlling the temperature of said second baffle plate.
Claim 5
Dependent Claim
28 words
A humidity control device, as claimed in claim 2, further including: means responsive to operation of said electrophotographic apparatus to disable said humidity control device during such operation.
Claim 6
Dependent Claim
39 words
A humidity control device, as claimed in claim 2, further including: a humidistat mounted adjacent said support and said feed path defining means and connected to said heating means to control said heating means in response to relative humidity.
References Cited (Backward Citations)
US3072026A
Cited
US3349221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |