Patent ID: 6016410
Filing Date: 2000-01-18
Classification: G03G

Abstract:
A fuser, for a reproduction apparatus, having at least one heated fuser roller operating at a setpoint temperature to permanently fix a marking particle image to a receiver member, and a mechanism for controlling temperature droop in said at least one heated fuser roller, said temperature droop controlling mechanism comprising:an external heat source movable to a position in operative relation with said at least one heated fuser roller and a nonoperative position remote from said at least one heated fuser roller;a source of pressurized air; anda logic and control unit for(1) regulating heat input to said at least one heated fuser roller, during an idle period, to maintain said at least one heated fuser roller at an idle temperature above the set point temperature;(2) at the actuation of the reproduction apparatus job run start, regulating heat input to said at least one heated fuser roller to heat the fuser roller to a temperature above said idle temperature(3) after a preselected time, actuating said source of pressurized air direct air flow at said at least one heated fuser roller for creating an intended thermal gradient in said at least one heated fuser roller; and(4) at a preselected time later, enabling a first receiver member of a reproduction job run to be transported into operative relation with said at least one heated fuser roller, whereby there is substantially no temperature droop in said at least one heated fuser roller.