Patent US4812860A successfully refreshed from Google Patents.
US4812860A
Expired / Lapsed
US
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Heater for ionographic marking head array
Assignee: Xerox Corp
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Filing: 1988-05-04
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Granted: 1989-03-14
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Expires: 2008-05-04
Abstract
Abstract A heater for an ionographic marking apparatus including a housing, means for generating a supply of marking ions within the housing, means for transporting the marking ions through and out of the housing, and an array of modulation electrodes upon a substrate for controlling the transport of ions out of the housing, the modulation electrodes being spaced from one another by electrically insulating regions. The heater is associated with the array for raising the temperature of the electrically insulating regions so as to prevent the condensation of moisture thereon.
Inventors
- 👤 Nicholas K. Sheridan
- 👤 Richard G. Stearns
- 👤 John A. Frank
- 👤 Brendan Casey
- 👤 William Gary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:09
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; G03G15/323
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
99 words
An ionographic marking apparatus including a housing, means for generating a supply of marking ions within said housing, means for transporting said marking ions through and out of said housing, and means for controlling the transport of said ions of said housing, said means for controlling comprising a substrate provided on one surface with an array of electrically conducting ion modulation electrodes spaced from one another by electrically insulating regions, the improvement comprising heating means associated with said means for controlling to raise the temperature of said electrically insulating regions so as to prevent the deposition of moisture thereon.
Claim 2
Dependent Claim
99 words
An ionographic marking apparatus including a housing, means for generating a supply of marking ions within said housing, means for transporting said marking ions through and out of said housing, and means for controlling the transport of said ions of said housing, said means for controlling comprising a substrate provided on one surface with an array of electrically conducting ion modulation electrodes spaced from one another by electrically insulating regions, the improvement comprising heating means associated with said means for controlling to raise the temperature of said electrically insulating regions so as to prevent the deposition of moisture thereon.
Claim 3
Dependent Claim
34 words
The ionographic marking apparatus as defined in claim 1 wherein said heating means is arranged to raise the temperature of said electrically insulating regions to the range of 100° F. to to 130° F.
Claim 4
Dependent Claim
24 words
The ionographic marking apparatus as defined in claim 1 or claim 2 wherein said heating means comprises a resistive heater secured to said substrate.
Claim 5
Dependent Claim
26 words
The ionographic marking apparatus as defined in claim 3 wherein said resistive heater is secured to the surface of said substrate opposite to said one surface.
Claim 6
Dependent Claim
25 words
The ionographic marking apparatus as defined in claim 3 wherein said resistive heater is continuously powered when the marking apparatus is in an ON condition.
Claim 7
Dependent Claim
25 words
The ionographic marking apparatus as defined in claim 3 wherein said resistive heater is intermittently powered through temperature control means for cycling a constant temperature.
References Cited (Backward Citations)
US3413654A
Cited
US4644373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-13 | 1992-09-12 | 1993-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-13 | 1996-09-12 | 1997-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-13 | 2000-09-12 | 2001-03-14 | $7700.00 | Window Closed / Lapsed |