US3848305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll for contact fusing thermoplastic particles to substrates
Assignee: International Business Machines Corp
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Filing: 1972-12-26
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Granted: 1974-11-19
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Expires: 1992-12-26
Abstract
Abstract A fuser roll is coated with a silicone elastomer and heat and vacuum cured to remove the cyclic siloxanes to a state of constant weight loss to improve the release of paper and toner from the roll surface.
Inventors
- 👤 P Jachimiak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:07
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; C; C08; C08G; C08G77/00; C08G77/04; C08G77/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
57 words
A ROLL FOR FUSING THERMOPLASTIC GRANULAR MATERIAL TO A SUBSTRATE, SAID ROLL HAVING A CYLINDRICAL CORE, AND A COATING ON SAID CORE OF A SILICONE ELASTOMERIC MATERIL, THE IMPROVEMENT COMPRISING: SAID COATING HAVING THE VOLATILE COMPONENTS THEREOF, REDUCED TO A LEVEL AT WHICH THE COATING HAS, UNDER IN SERVICE CONDITIONS, A SUBSTANTIALLY CONSTANT RATE OF WEIGHT LOSS.
Claim 2
Dependent Claim
57 words
A ROLL FOR FUSING THERMOPLASTIC GRANULAR MATERIAL TO A SUBSTRATE, SAID ROLL HAVING A CYLINDRICAL CORE, AND A COATING ON SAID CORE OF A SILICONE ELASTOMERIC MATERIL, THE IMPROVEMENT COMPRISING: SAID COATING HAVING THE VOLATILE COMPONENTS THEREOF, REDUCED TO A LEVEL AT WHICH THE COATING HAS, UNDER IN SERVICE CONDITIONS, A SUBSTANTIALLY CONSTANT RATE OF WEIGHT LOSS.
Claim 3
Dependent Claim
64 words
A roll for fusing thermoplastic granular material to a substrate, said roll having a cylindrical core, and a coating on said core of a silicone elastomeric material, the improvement comprising: said coating having the volatile components thereof, reduced to below the level at which said coating has a substantially constant rate of weight loss for a selected temperature and under a selected nip pressure.
Claim 4
Dependent Claim
64 words
A roll for fusing thermoplastic granular material to a substrate, said roll having a cylindrical core, and a coating on said core of a silicone elastomeric material, the improvement comprising: said coating having the volatile components thereof, reduced to below the level at which said coating has a substantially constant rate of weight loss for a selected temperature and under a selected nip pressure.
Claim 5
Dependent Claim
18 words
The roll of claim 2 wherein said volatile components are cyclic siloxanes having the basic unit structure of
References Cited (Backward Citations)
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 |