Patent US4538052A successfully refreshed from Google Patents.
US4538052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixing roller for a copying machine
Assignee: Fujifilm Business Innovation Corp
•
Filing: 1982-07-30
•
Granted: 1985-08-27
•
Expires: 2002-07-30
Abstract
Abstract A fixing roller for a fixing unit for a copying machine has a heater disposed within an aluminum cylinder. A pair of stainless steel, U-shaped plates, which have holes cut in their bottoms, are fitted into opposite end portions of the cylinder to hold the heater and to utilize the heat generated thereby. A pair of bearings, which have outer races made of heat-resistant resin, are fitted into the opposite end portions of the cylinder under pressure to support the cylinder so that the outer races and the cylinder turn as one unit.
Inventors
- 👤 Tetsu Asanuma
- 👤 Satoru Inagaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:52
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
73 words
A fixing roller for a copying machine comprising a frame means, a heat conductive cylinder, a heater disposed within said cylinder, support means for holding said heater, and bearing means secured to said frame means for rotatably supporting said cylinder on said frame means, said bearing means being comprised of two bearings each having an outer race made of heat resistant resin fitted into opposite end portions of said cylinder under pressure, respectively.
Claim 2
Dependent Claim
73 words
A fixing roller for a copying machine comprising a frame means, a heat conductive cylinder, a heater disposed within said cylinder, support means for holding said heater, and bearing means secured to said frame means for rotatably supporting said cylinder on said frame means, said bearing means being comprised of two bearings each having an outer race made of heat resistant resin fitted into opposite end portions of said cylinder under pressure, respectively.
Claim 3
Dependent Claim
25 words
A fixing roller as set forth in claim 1 further comprising two ring shaped steel plates fitted into opposite end portions of said cylinder, respectively.
Claim 4
Dependent Claim
16 words
A fixing roller as set forth in claim 1 wherein said cylinder is made of aluminum.
Claim 5
Dependent Claim
37 words
A fixing roller as set forth in claim 1 wherein said bearings each further include a cylindrical hub secured to said frame means and a plurality of balls interposed between said outer race and said cylindrical hub.
References Cited (Backward Citations)
DE631618C
Cited
US2047372A
Cited
US2011748A
Cited
US3084616A
Cited
US3201558A
Cited
US3257939A
Cited
US3437032A
Cited
US3471681A
Cited
US4001544A
Cited
US3912901A
Cited
US4105896A
Cited
US4063066A
Cited
US4116749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |