Hot roll fuser early closure inhibitor

Details Hot roll fuser early closure inhibitor Hot roll fuser early closure inhibitor

G - Physics

03

G

314/38.5

G03G 15/20 (2006.01)

Patent

CA 1095969

HOT ROLL FUSER EARLY CLOSURE INHIBITOR Abstract of the Disclosure A heated fuser roller and backup roller fix toner on a sheet passing therebetween. These rollers are separated during nontoner fixing periods and normally closed for a predetermined early closure period prior to arrival of a sheet at the nip between the rollers. The immediate past history of fusing activity is monitored to determine whether the early roll closure is to be inhibited, a situation existing whenever the immediate past history indicates that steps must be taken to prevent backup roller overheating. The past history monitoring is performed by direct backup roller temperature sensing, timeout circuit operation or the like.

306467

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