Photocopying – Contact printing – Light boxes
Patent
1992-12-16
1994-12-27
Smith, Matthew S.
Photocopying
Contact printing
Light boxes
219216, G03G 1520
Patent
active
053769961
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.degree. C. than PTFE fuser rolls.
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Atwood et al, "Coating Composition Comprising PTFE, Polyphenylene Sulfide and a Polysulfone", in Defensive Publication T952,005, Published Nov. 2, 1976.
Dang T. A.
International Business Machines - Corporation
Seinberg Saul A.
Smith Matthew S.
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