Patent ID: 6256119
Filing Date: 2001-07-03
Classification: B41J,H04N

Abstract:
A sheet transfer device for transferring a sheet member along a transfer path having an upstream point and a downstream point, the sheet transfer device comprising:a transfer mechanism for moving the sheet member along the transfer path from the upstream point to the downstream point;at least one upstream sensor arranged closer to the upstream point than to the downstream point for detecting presence and absence of the sheet member; andat least one downstream sensor arranged closer to the downstream point than to the upstream point for detecting presence and absence of the sheet member, the downstream sensor being spaced from the upstream sensor by a predetermined distance measured along the transfer path, the predetermined distance being shorter than a length of the sheet member;wherein the transfer mechanism does not discharge the sheet member until the downstream sensor detects the presence of the sheet member, even if the upstream sensor detects the presence and then the absence of the sheet member.