Fuser including replacement detecting function

摘要

According to one embodiment, a fuser includes a fixing rotating section including a heat generating section, an opposed section configured to form a nip between the opposed section and the fixing rotating section, a first bimetal type thermostat disconnected by heat from the fixing rotating section to cut power supply to a heat generation source that causes the heat generation section to generate heat, and a second bimetal type thermostat present in a position different from the position of the first bimetal type thermostat in a rotating direction of the fixing rotating section and is disconnected by heat from the fixing rotating section to output an indication that the fixing rotating section is in use.

主权项

1. A fuser comprising:
a fixing rotating section including a heat generating section; an opposed section configured to form a nip between the opposed section and the fixing rotating section; an induction-current generating section disposed outside the fixing rotating section and configured to generate an induction current in the heat generating section; a first bimetal type thermostat configured to be disconnected by heat from the fixing rotating section to cut off power supplied to the induction-current generating section; and a second bimetal type thermostat configured to be disconnected by heat generated therein by the induction-current generating section, in response to which an indication that the fixing rotating section is in use is output.