TAPERED DONOR ROLL APPLICATOR FOR ROLL FUSER

摘要

D/77353 TITLE: TAPERED DONOR ROLL APPLICATOR FOR ROLLFUSERABSTRACT OF THE INVENTIONA heat and pressure roll fusing apparatus forfixing toner images to copy substrates, the toner comprisinga thermoplastic resin. The apparatus includes a heated,either internally or externally, fuser roll cooperatingwith a backup or pressure roll to form a nip through whichthe copy substrates pass with the images contacting theheated roll. The heated fuser roll is characterized byan outer layer or surface fabricated from a silicone rubbermaterial to which a low viscosity polymeric release fluidis applied, the silicone rubber being susceptible to swellingin the presence of the release fluid. A release fluid meteringsystem is provided which is adapted to apply release fluidto the entire outer surface or to only a portion thereofdepending upon the size substrate being utilized.