Patent ID: 7753355
Filing Date: 2010-07-13
Classification: B65H,H04N

Abstract:
1. An image reader comprising: an image reading portion that reads an image of a sheet conveyed at an image reading position; a first conveying portion that includes plural pairs of first rotating bodies arranged in the widthwise direction of the sheet, which crosses the sheet conveying direction, and that is provided at the upstream of the image reading position in the sheet conveying direction; a second conveying portion that includes plural pairs of second rotating bodies arranged in the widthwise direction of the sheet and that is provided at the downstream of the image reading position in the sheet conveying direction; a first changing portion that makes a changeover between a first state in which the plural pairs of first rotating bodies nip the sheet and a second state in which at least one of the plural pairs of first rotating bodies is separated and the nipping force of the other pairs of first rotating bodies is reduced compared to the first state; and a second changing portion that makes a changeover between a first state in which the plural pairs of second rotating bodies nip the sheet and a second state in which at least one of the plural pairs of second rotating bodies is separated and the nipping force of the other pairs of second rotating bodies is reduced compared to the first state, wherein the state of the plural pairs of first rotating bodies is changed from the first state to the second state during the conveyance of the sheet by the pairs of first rotating bodies and before the trailing end of the sheet passes through the pairs of first rotating bodies, and the state of the plural pairs of second rotating bodies is changed from the second state to the first state during the conveyance of the sheet by the pairs of second rotating bodies after the leading end of the sheet reaches the pairs of second rotating bodies.