US4082137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for fuser assembly cooling in an electrostatographic machine
Assignee: Xerox Corp
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Filing: 1976-06-16
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Granted: 1978-04-04
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Expires: 1996-06-16
Abstract
Abstract A heat transfer assembly is provided having heat transfer elements which contact end portions of a pressure roller of a fuser assembly. A heat transfer fluid is caused to pass over the elements in response to a signal to remove heat therefrom thereby cooling such portions of the pressure roller in contact with the elements.
Inventors
- 👤 Karl Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:12
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2039; G03G15/2042
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
92 words
The method of cooling a fuser assembly including a fuser roller and a pressure roller, the steps which comprise placing heat transfer means in heat exchange relation with said pressure roller of said assembly positioning an enclosure about said heat transfer means to form in cooperation with said heat transfer means a zone, said zone having an inlet and an outlet means thereto; passing a heat transfer fluid through said zone about said heat transfer means; and withdrawing said fluid from said zone to cool said fuser assembly fuser and pressure rollers.
Claim 2
Independent Claim
92 words
The method of cooling a fuser assembly including a fuser roller and a pressure roller, the steps which comprise placing heat transfer means in heat exchange relation with said pressure roller of said assembly positioning an enclosure about said heat transfer means to form in cooperation with said heat transfer means a zone, said zone having an inlet and an outlet means thereto; passing a heat transfer fluid through said zone about said heat transfer means; and withdrawing said fluid from said zone to cool said fuser assembly fuser and pressure rollers.
Claim 3
Dependent Claim
37 words
The method as defined in claim 1 including the step of passing said heat transfer fluid through said zone in response to a signal indicating a change in the operation of a machine employing said fuser assembly.
Claim 4
Dependent Claim
33 words
The method as defined in claim 2 including the step of producing said signal in response to use of a receiving surface having a dimension less that the length of said fuser roller.
Claim 5
Dependent Claim
28 words
The method as defined in claim 1 including the step of placing said heat transfer means in heat exchange relationship with the opposite ends of said pressure roller.
Claim 6
Independent Claim
98 words
The method of cooling a fuser assembly in an electrostatic reproduction machine, said fuser assembly being of the roll type having cooperating fuser and pressure rollers, the steps comprising: forming a heat exchange chamber along the axial length of a portion of one of said fuser and pressure rollers; providing heat dissipating elements in said chamber in heat exchange relationship with the end sections of said one of said fuser and pressure rollers; and passing a heat exchange fluid through said chamber and across said heat exchange elements to cool said one of said fuser and pressure rollers.
Claim 7
Independent Claim
98 words
The method of cooling a fuser assembly in an electrostatic reproduction machine, said fuser assembly being of the roll type having cooperating fuser and pressure rollers, the steps comprising: forming a heat exchange chamber along the axial length of a portion of one of said fuser and pressure rollers; providing heat dissipating elements in said chamber in heat exchange relationship with the end sections of said one of said fuser and pressure rollers; and passing a heat exchange fluid through said chamber and across said heat exchange elements to cool said one of said fuser and pressure rollers.
Claim 8
Dependent Claim
19 words
The method according to claim 5 including the step of forming said chamber along said fuser assembly pressure roller.
Claim 9
Dependent Claim
107 words
In the method of cooling the ends of the pressure roller in a roll-type fuser having contactable pressure and heated fuser rollers for fixing toner images on copies produced by an electrostatic type reproduction machine when the dimension of said copies is less than the dimension of said pressure and fuser rollers, the steps which comprise: forming a heat exchange chamber over at least the ends of said pressure roller; providing heat exchange elements in said chamber in heat exchange relationship with said pressure roller ends; and passing a heat exchange medium through said chamber and across said heat exchange elements to cool said pressure roller ends.
Claim 10
Dependent Claim
107 words
In the method of cooling the ends of the pressure roller in a roll-type fuser having contactable pressure and heated fuser rollers for fixing toner images on copies produced by an electrostatic type reproduction machine when the dimension of said copies is less than the dimension of said pressure and fuser rollers, the steps which comprise: forming a heat exchange chamber over at least the ends of said pressure roller; providing heat exchange elements in said chamber in heat exchange relationship with said pressure roller ends; and passing a heat exchange medium through said chamber and across said heat exchange elements to cool said pressure roller ends.
Claim 11
Dependent Claim
36 words
The method according to claim 7 including the step of terminating passing of said heat exchange medium when the dimension of said copies is substantially the same as the dimension of said pressure and fuser rollers.
References Cited (Backward Citations)
US2260486A
Cited
US2311849A
Cited
US3029178A
Cited
US3329076A
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US3561868A
Cited
US3583805A
Cited
US3578862A
Cited
US3622241A
Cited
US3952798A
Cited
US3695756A
Cited
US3762814A
Cited
US3816066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |