Tapered donor roll applicator for roll fuser

Details Tapered donor roll applicator for roll fuser Tapered donor roll applicator for roll fuser

1978-03-29

1981-03-31

Kaplan, Morris

Coating apparatus

With heat exchange, drying, or non-coating gas or vapor...

With solid heat exchange means contacting work

G03G 1520

Patent

active

042586488

ABSTRACT:
A heat and pressure roll fusing apparatus for fixing toner images to copy substrates, the toner comprising a thermoplastic resin. The apparatus includes a heated, either internally or externally, fuser roll cooperating with a backup or pressure roll to form a nip through which the copy substrates pass with the images contacting the heated roll. The heated fuser roll is characterized by an outer layer or surface fabricated from a silicone rubber material to which a low viscosity polymeric release fluid is applied, the silicone rubber being susceptible to swelling in the presence of the release fluid. A release fluid metering system is provided which includes a tapered roll that is adapted to apply release fluid to the entire outer fuser roll surface or to only a portion thereof depending upon the size substrate being utilized.

REFERENCES:
patent: 1993284 (1935-03-01), Roehm
patent: 3032007 (1962-05-01), McCauliff
patent: 3918397 (1975-11-01), Thettu
patent: 3964431 (1976-06-01), Namiki
patent: 4019024 (1977-04-01), Namiki
patent: 4045165 (1977-08-01), Nakajima et al.
patent: 4136613 (1979-01-01), Namiki
IBM Technical Disclosure Bulletin, vol. 14, No. 4, Sep. 1971, "Offset Preventing Materials for Roll Fuser", p. 1159.

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