Tapered donor roll applicator for roll fuser

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

G - Physics

03

G

314/38.5

G03G 15/20 (2006.01)

Patent

CA 1138524

D/77353 TITLE: TAPERED DONOR ROLL APPLICATOR FOR ROLL FUSER ABSTRACT OF THE INVENTION 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 is adapted to apply release fluid to the entire outer surface or to only a portion thereof depending upon the size substrate being utilized.

321525

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