EP0453077A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A roll for fusing heat softenable toner material
Assignee: Lexmark International Inc
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Filing: 1991-03-06
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Granted: —
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Expires: 2011-03-06
Abstract
Abstract A roll for hot fusing having a coating comprising a cross-linked elastomeric random copolymer of dimethylsiloxane and diphenylsiloxane and three additives, (1) from 40 to 55% by weight of small zinc oxide particles, (2) from 5 to 10% by weight of small graphite particles and (3) from 1 to 5% by weight of ceric dioxide particles.
Inventors
- 👤 Juan Ayala-Esquilin
- 👤 William Harve Dickstein
- 👤 James Lupton Hedrick, Jr.
- 👤 John Campbell Scott
- 👤 Arnold Chang-Mou Yang
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 14:35
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; C; C08; C08K; C08K3/00; C08K3/01; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1372; Y10T428/139; Y10T428/29; Y10T428/2982; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
A roll for fusing heat softenable toner material to a substrate, said roll comprising a core and an outer covering which comprises a cross-linked elastomeric random copolymer of dimethylsiloxane and diphenylsiloxane, characterised in that the covering incorporates from 40 to 55% by weight of particles of zinc oxide in the range of 100 to 500 nm diameter, from 5 to 10% by weight of graphite particles with major diameters no greater than 10 microns, and from 1 to 5% by weight of ceric dioxide particles from 0.2 to 3.0 microns in size.
Claim 2
Dependent Claim
28 words
A roll as claimed in Claim 1 wherein the copolymer of dimethylsiloxane and diphenylsiloxane has a weight concentration of phenyl in the range of from 20 to 50%.
Claim 3
Dependent Claim
15 words
A roll as claimed in Claim 2 wherein the weight concentration of phenyl is 25%.
Claim 4
Dependent Claim
25 words
A roll as claimed in Claim 1, 2 or 3 wherein the copolymer has a molecular weight in the range of 10,000 to 30,000 g/mol.
Claim 5
Dependent Claim
17 words
A roll as claimed in Claim 4 wherein the copolymer has a molecular weight of 20,000 g/mol.
Claim 6
Dependent Claim
20 words
A roll as claimed in any of the preceding Claims wherein the covering incorporates 50% by weight of zinc oxide.
Claim 7
Dependent Claim
19 words
A roll as claimed in any of the preceding Claims wherein the covering incorporates 8% by weight of graphite.
Claim 8
Dependent Claim
20 words
A roll as claimed in any of the preceding Claims wherein the covering incorporates 2% by weight of ceric oxide.
References Cited (Backward Citations)
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