FIXING DEVICE AND IMAGE FORMING APPARATUS

摘要

A fixing device includes a fixing rotary body and a heater disposed opposite and heating the fixing rotary body. A nip formation assembly presses against an opposed body via the fixing rotary body to form a fixing nip between the fixing rotary body and the opposed body, through which a recording medium is conveyed. A movable heat shield movable in a circumferential direction of the fixing rotary body is interposed between the heater and the fixing rotary body to shield the fixing rotary body from the heater in a variable axial span of the fixing rotary body. A stationary heat shield, interposed between the heater and the fixing rotary body to shield the fixing rotary body from the heater, is disposed outboard from a lateral edge of a heat generator of the heater in an axial direction of the fixing rotary body.

主权项

1. A fixing device comprising:
a fixing rotary body rotatable in a predetermined direction of rotation; a heater disposed opposite and heating the fixing rotary body, the heater including a heat generator to generate heat; an opposed body contacting the fixing rotary body; a nip formation assembly pressing against the opposed body via the fixing rotary body to form a fixing nip between the fixing rotary body and the opposed body, the fixing nip through which a recording medium is conveyed; a movable heat shield movable in a circumferential direction of the fixing rotary body and interposed between the heater and the fixing rotary body to shield the fixing rotary body from the heater in a variable axial span of the fixing rotary body; and a stationary heat shield interposed between the heater and the fixing rotary body to shield the fixing rotary body from the heater, the stationary heat shield disposed outboard from a lateral edge of the heat generator of the heater in an axial direction of the fixing rotary body.