Patent US5376996A successfully refreshed from Google Patents.
US5376996A
Expired / Lapsed
US
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Polyphenylene sulfide-PTFE coating for fuser roll
Assignee: International Business Machines Corp
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Filing: 1992-12-16
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Granted: 1994-12-27
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Expires: 2012-12-16
Abstract
Abstract A fuser roll for fusing toner (12) onto paper (10) in electrophotographic printers and copiers is made of a hollow metal tube (14) provided with a coating (18), of about 60 to 90 wt % polyphenylene sulfide (PPS) and about 10 to 40 wt % polytetrafluoroethylene (PTFE). Up to about 40 wt % of a filler may be added to the total composition. The fuser roll coated with the PPS-PTFE composition of the invention results in improved fusing of the toner, providing a matt finish of the fused toner on paper, improved uniformity of print quality, longer wear of the fuser roll, and reduced toner smear. The PPS-PTFE roll produces better toner fusing with both rough and smooth papers, and performs better at the same fuser roll temperature of 190° C. than PTFE fuser rolls.
Inventors
- 👤 Velliyur R. Sankaran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:23
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; C; C08; C08L; C08L81/00; C08L81/02; C09; C09D; C09D181/00; C09D181/02; C08L27/00; C08L27/02; C08L27/12; C08L27/18
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
67 words
A fuser roll for fusing toner in electrophotographic printers and copiers comprising a hollow metal tube provided with a coating, wherein said coating consists essentially of (a) about 60 to 90 wt % of a polymer blend consisting essentially of about 60 to 90 wt % polyphenylene sulfide and about 10 to 40 wt % polytetrafluoroethylene, and (b) about 10 to 40 wt % of a filler.
Claim 2
Dependent Claim
67 words
A fuser roll for fusing toner in electrophotographic printers and copiers comprising a hollow metal tube provided with a coating, wherein said coating consists essentially of (a) about 60 to 90 wt % of a polymer blend consisting essentially of about 60 to 90 wt % polyphenylene sulfide and about 10 to 40 wt % polytetrafluoroethylene, and (b) about 10 to 40 wt % of a filler.
Claim 3
Dependent Claim
23 words
The fuser roll of claim 1 wherein said filler is selected from the group consisting of glass, clay, carbon black, and metallic powder.
Claim 4
Dependent Claim
18 words
The fuser roll of claim 2 wherein said coating includes about 40 wt % of fiber glass filler.
Claim 5
Dependent Claim
22 words
The fuser roll of claim 1 wherein said coating comprises about 70 wt % polyphenylene sulfide and about 30 wt % polytetrafluoroethylene.
Claim 6
Dependent Claim
45 words
The fuser roll of claim 1 wherein said coating comprises (a) about 60 wt % of a polymeric blend consisting essentially of about 70 wt % polyphenylene sulfide and about 30 wt % polytetrafluoroethylene and (b) about 40 wt % of a fiber glass filler.
Claim 7
Dependent Claim
63 words
A fuser roll for fusing toner in electrophotographic printers and copiers comprising a hollow metal tube provided with a coating, wherein said coating consists essentially of (a) about 60 to 90 wt % of a polymer blend consisting essentially of about 70 wt % polyphenylene sulfide and about 30 wt % polytetrafluoroethylene and (b) about 10 to 40 wt % of a filler.
Claim 8
Dependent Claim
63 words
A fuser roll for fusing toner in electrophotographic printers and copiers comprising a hollow metal tube provided with a coating, wherein said coating consists essentially of (a) about 60 to 90 wt % of a polymer blend consisting essentially of about 70 wt % polyphenylene sulfide and about 30 wt % polytetrafluoroethylene and (b) about 10 to 40 wt % of a filler.
Claim 9
Dependent Claim
23 words
The fuser roll of claim 6 wherein said filler is selected from the group consisting of glass, clay, carbon black, and metallic powder.
Claim 10
Dependent Claim
18 words
The fuser roll of claim 7 wherein said coating includes about 40 wt % of fiber glass filler.
Claim 11
Dependent Claim
114 words
An improved process for fusing toner to a print medium in an electrophotographic printer or copier, comprising passing said print medium through a nip defined by a fuser roll and a pressure roll, said fuser roll comprising a hollow metal tube provided with a heat lamp therein and with a coating on its outer surface, wherein the improvement comprises applying to said outer surface of said fuser roll a coating consisting essentially of (a) about 60 to 90 wt % of a polymer blend consisting essentially of about 60 to 90 wt % polyphenylene sulfide and about 10 to 40 wt % polytetrafluoroethylene, and (b) about 10 to 40 wt % of a filler.
Claim 12
Dependent Claim
114 words
An improved process for fusing toner to a print medium in an electrophotographic printer or copier, comprising passing said print medium through a nip defined by a fuser roll and a pressure roll, said fuser roll comprising a hollow metal tube provided with a heat lamp therein and with a coating on its outer surface, wherein the improvement comprises applying to said outer surface of said fuser roll a coating consisting essentially of (a) about 60 to 90 wt % of a polymer blend consisting essentially of about 60 to 90 wt % polyphenylene sulfide and about 10 to 40 wt % polytetrafluoroethylene, and (b) about 10 to 40 wt % of a filler.
Claim 13
Dependent Claim
22 words
The process of claim 9 wherein said filler is selected from the group consisting of glass, clay, carbon black, and metallic powder.
Claim 14
Dependent Claim
17 words
The process of claim 10 wherein said coating includes about 40 wt % of fiber glass filler.
Claim 15
Dependent Claim
20 words
The process of claim 9 wherein said coating comprises about 70 wt % polyphenylene sulfide and 30 wt % polytetrafluoroethylene.
Claim 16
Dependent Claim
17 words
The process of claim 12 wherein said coating includes about 40 wt % of fiber glass filler.
Claim 17
Dependent Claim
110 words
An improved process for fusing toner to a print medium in an electrophotographic printer or copier, comprising passing said print medium through a nip defined by a fuser roll and a pressure roll, said fuser roll comprising a hollow metal tube provided with a heat lamp therein and with a coating on its outer surface, wherein the improvement comprises applying to said outer surface of said fuser roll a coating consisting essentially of (a) about 60 to 90 wt % of a polymer blend consisting essentially of about 70 wt % polyphenylene sulfide and about 30 wt % polytetrafluoroethylene and (b) about 10 to 40 wt % of a filler.
Claim 18
Dependent Claim
110 words
An improved process for fusing toner to a print medium in an electrophotographic printer or copier, comprising passing said print medium through a nip defined by a fuser roll and a pressure roll, said fuser roll comprising a hollow metal tube provided with a heat lamp therein and with a coating on its outer surface, wherein the improvement comprises applying to said outer surface of said fuser roll a coating consisting essentially of (a) about 60 to 90 wt % of a polymer blend consisting essentially of about 70 wt % polyphenylene sulfide and about 30 wt % polytetrafluoroethylene and (b) about 10 to 40 wt % of a filler.
Claim 19
Dependent Claim
22 words
The process of claim 14 wherein said filler is selected from the group consisting of glass, clay, carbon black, and metallic powder.
Claim 20
Dependent Claim
17 words
The process of claim 15 wherein said coating includes about 40 wt % of fiber glass filler.
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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) | 1997-12-26 | 1998-06-27 | 1998-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-26 | 2002-06-27 | 2002-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-26 | 2006-06-27 | 2006-12-27 | $7700.00 | Window Closed / Lapsed |