G - Physics – 03 – G
Patent
G - Physics
03
G
341/32, 314/38.5
G03G 15/20 (2006.01)
Patent
CA 1081309
Abstract of the Disclosure Apparatus for controlling the surface temperature of a fusing roller of the type having a heat-insulative, release surface over a thermally conductive core, by (1) internally heating the core, (2) sensing the temperature of the core rather than of the external release surface, (3) providing different temperature control settings for the core sensor and (4) selectively switching the internal heating means into operative relation with a predetermined control setting in anticipation of changes in heat loss from the external surface. The core of the fusing roll is thereby controlled toward the different temperature control settings, one at the "copy run" condition, another at the "idle" con- dition, and in some instances the same control setting is used for the "copy run" and the "idle" condition. Such core temperature settings are selected to create the particular temperature differentials across the heat-insulative roll cover that are necessary to counteract the different heat losses which occur during running and idling conditions in order to maintain the proper external release surface fusing temperature.
247914
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