US3849628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-contact temperature sensor for a roll fuser of a xerographic reproduction apparatus
Assignee: Xerox Corp
•
Filing: 1973-07-25
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Granted: 1974-11-19
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Expires: 1993-07-25
Abstract
Abstract Apparatus for fusing toner material to a substrate by passing the substrate between a pair of rollers at least one of which is heated. The surface temperature of the heated roller at an area where it contacts the toner material is maintained at a substantially constant value by means of a non-contact sensor comprising a part of a control for the heated roll.
Inventors
- 👤 G Abowitz
- 👤 F Ruckdeschel
- 👤 R Gerace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:10
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2039
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
133 words
Fuser apparatus comprising: a first roller; a second roller cooperating with said first roller to form a nip through which a substrate supporting toner material is moved; means for heating at least one of said rollers to elevate the surface temperature thereof to a level sufficient to render the toner material tacky; means out of contact from said at least one of said rollers for sensing the surface temperature thereof; and means responsive to the temperature sensed for controlling said heating for maintaining the surface temperature of said at least one of said rollers constant in an area where the toner material is contacted thereby, said means for sensing temperature comprising means for converting thermal radiation to light radiation representative of said surface temperature whereby said temperature sensing means senses said light radiation.
Claim 2
Dependent Claim
133 words
Fuser apparatus comprising: a first roller; a second roller cooperating with said first roller to form a nip through which a substrate supporting toner material is moved; means for heating at least one of said rollers to elevate the surface temperature thereof to a level sufficient to render the toner material tacky; means out of contact from said at least one of said rollers for sensing the surface temperature thereof; and means responsive to the temperature sensed for controlling said heating for maintaining the surface temperature of said at least one of said rollers constant in an area where the toner material is contacted thereby, said means for sensing temperature comprising means for converting thermal radiation to light radiation representative of said surface temperature whereby said temperature sensing means senses said light radiation.
Claim 3
Dependent Claim
25 words
Apparatus according to claim 1 wherein said sensing means comprises means for generating electrical signals representative of the temperature of said at least one roller.
Claim 4
Dependent Claim
50 words
Apparatus according to claim 2 wherein said converting means comprises a phosphor material and means for exciting said phosphor material to thereby emit visible radiation, said phosphor material being so disposed relative to said at least one roller as to receive thermal energy therefrom in accordance with the temperature thereof.
Claim 5
Dependent Claim
22 words
Apparatus according to claim 3 wherein said phosphor material comprises a continuous stripe about the circumference of said at least one roller.
Claim 6
Dependent Claim
24 words
Apparatus according to claim 3 wherein said phosphor material comprises a plurality of segments extending about the circumference of said at least one roller.
Claim 7
Dependent Claim
19 words
Apparatus according to claim 3 wherein said phosphor material comprises a substrate positioned adjacent said at least one roller.
Claim 8
Dependent Claim
20 words
Apparatus according to claim 3 wherein said phosphor material comprises an electroluminescent panel positioned adjacent said at least one roller.
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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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |