Patent US4435069A successfully refreshed from Google Patents.
US4435069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixing apparatus for electrophotography
Assignee: Fujifilm Holdings Corp
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Filing: 1982-09-03
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Granted: 1984-03-06
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Expires: 2002-09-03
Abstract
Abstract A fixing apparatus for electrophotography includes a fixing drum having an infrared radiation heat source in the interior thereof and a backing roller which cooperates with the fixing drum to transport a recording sheet. The fixing drum is made of a transparent material that is permeable to infrared radiation and has an outer coating of a material that absorbs a part of the infrared radiation.
Inventors
- 👤 Masamichi Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:57
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
49 words
A fixing apparatus for use in electrophotography comprising; a fixing drum including an infrared radiation heat source in the interior thereof, said fixing drum being made of a transparent material permeable to infrared radiation and having an outer layer of a material which absorbs part of the infrared radiation.
Claim 2
Dependent Claim
49 words
A fixing apparatus for use in electrophotography comprising; a fixing drum including an infrared radiation heat source in the interior thereof, said fixing drum being made of a transparent material permeable to infrared radiation and having an outer layer of a material which absorbs part of the infrared radiation.
Claim 3
Dependent Claim
17 words
An apparatus as claimed in claim 1, said outer layer having a transmittance of 30 to 70%.
Claim 4
Dependent Claim
15 words
An apparatus as claimed in claim 1, said outer layer comprising a vapor-deposited black film.
Claim 5
Dependent Claim
16 words
An apparatus as claimed in claim 3, said film having a thickness of approximately 500 Å.
Claim 6
Dependent Claim
15 words
An apparatus as claimed in claim 1, said outer layer comprising pigmented light absorbing glass.
Claim 7
Dependent Claim
32 words
An apparatus as claimed in claim 1, further comprising a backing roller cooperating with said fixing drum to transport a recording sheet, said backing roller imparting a light pressure to said sheet.
Claim 8
Dependent Claim
31 words
An apparatus as claimed in claim 1, further including reflector means proximate said heat source for reflecting infrared radiation onto a recording sheet during contact of said sheet with said drum.
Claim 9
Dependent Claim
38 words
An apparatus as claimed in claim 1, further including reflector means proximate said heat source for reflecting infrared radiation onto a recording sheet to preheat toner images on said sheet before they contact the surface of said drum.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |