Patent ID: 8678382
Filing Date: 2014-03-25
Classification: B65H

Abstract:
1. A sheet conveyance apparatus comprising: a conveyance roller pair configured to nip and convey a sheet; a conveyance roller driving unit configured to drive the conveyance roller pair; a registration roller pair disposed downstream of the conveyance roller pair and configured to nip and convey the sheet to a transfer unit; a registration driving unit configured to drive the registration roller pair to rotate forward and backward, wherein the registration driving unit rotates the registration roller pair forward to convey the sheet downstream in a conveying direction, and rotates the registration roller pair backward to convey the sheet upstream in the conveying direction; a separation and press-contact unit configured to set the registration roller pair to a separated state and to a press-contact state; and a control unit configured to control the conveyance roller driving unit, the registration driving unit, and the separation and press-contact unit, wherein the control unit sets the registration roller pair to the separated state after a leading edge of a preceding sheet conveyed downstream in the conveying direction by the registration roller pair has reached the transfer unit, wherein the control unit stops driving of the conveyance roller pair, and set the separated registration roller pair to the press-contact state after a succeeding sheet has stopped at a stop position near a nip portion of the registration roller pair; and wherein the control unit resumes the rotation of the conveyance roller pair after the registration roller pair has been set to the press-contact state, and rotates the registration roller pair backward and the conveyance roller pair forward to form a loop in the succeeding sheet between a nip portion of the conveyance roller pair and the nip portion of the registration roller pair.