Patent ID: 8630556
Filing Date: 2014-01-14
Classification: G03G

Abstract:
1. A fixing device for fixing a toner image on a recording medium, comprising: a fixing roller to rotate in a predetermined direction of rotation; a pressing roller to rotate and contact an outer circumferential surface of the fixing roller to form a nip between the pressing roller and the fixing roller through which the recording medium bearing the toner image passes to fix the toner image by heat and pressure, a position of the pressing roller changeable relative to the fixing roller; a pressing lever disposed to hold both lateral end portions of the pressing roller; a cam disposed on a camshaft, to rotate the pressing lever to change the position of the pressing roller, with rotation of the cam in a first, pressing direction enabling the pressing roller to pressingly contact the fixing roller, and rotation of the cam in a second direction opposite the pressing direction enabling the pressing roller to separate from the fixing roller; a cam upper limit position detector to detect an upper limit position of the cam as the cam rotates in the pressing direction of the pressing roller pressing against the fixing roller; and a controller to provide notification of an error based on a detection result provided by the cam upper limit position detector.