Patent ID: 9695002
Date: 2017-07-04
CPC Classifications: B65H,G03G

Claim:
1. A sheet feeder for an image forming apparatus including a sheet feed path exposable to an exterior of the sheet feeder, comprising: a discharge member, located downstream of the sheet feed path in a sheet feeding direction, configured to discharge a sheet to the exterior of the sheet feeder; a discharge sensor, located upstream of the discharge member in the sheet feed path, configured to detect the discharge of the sheet; a fixing device, located upstream of the discharge member in the sheet feeding direction, configured to fix a toner image on the sheet; a fixing exit sheet sensor, located downstream of the fixing device in the sheet feed path, configured to detect whether the sheet is clamped by the fixing device; and a controller, via a malfunction detector, configured to detect a sheet jam during the feeding and discharging of the sheet, wherein, if the sheet is detected by the discharge sensor but not by the fixing exit sheet sensor, the controller is configured to cancel a malfunction state due to the sheet jam when a signal output from the discharge sensor shifts from a signal indicating detection of the sheet to a signal indicating non-detection of the sheet.