Sheet processing apparatus
AssigneeCanon Finetech Nisca Inc.
InventorsSatoshi IWAMA, Toshikazu TANAKA
Life of this patent
Estimating the term…
Abstract
A sheet processing apparatus for processing sheets includes: a stack tray on which a sheet is stacked; a discharge roller pair composed of first and second rollers and configured to discharge a sheet onto the stack tray, the second roller being configured to be movable between a pressure contact position to contact with the first roller and a retracting position to separate from the first roller; and a pressure contact/separation mechanism for moving the second roller from the retracting position to the pressure contact position. The pressure contact/separation mechanism changes the timing at which the second roller reaches the pressure contact position according to the type of a sheet to be discharged.
Claims8
A sheet processing apparatus for processing a sheet, comprising:
- a stack tray on which a sheet is stacked;
- a discharge roller pair composed of first and second rollers and configured to discharge a sheet onto the stack tray, the second roller being configured to be movable between a pressure contact position to contact with the first roller and a retracting position to separate from the first roller;
- and
- a pressure contact/separation mechanism for moving the second roller from the retracting position to the pressure contact position, wherein
- the pressure contact/separation mechanism changes the timing at which the second roller reaches the pressure contact position according to the type of a sheet to be discharged.
A sheet processing apparatus for processing a sheet, comprising:
- a processing tray for applying post-processing to a sheet;
- a post-processing unit disposed on one end side of the processing tray and configured to apply post-processing to a sheet located at a stapling position on the processing tray;
- a conveying roller pair disposed above the processing tray and configured to convey a sheet onto the processing tray;
- a discharge roller pair configured to be brought in a pressure contact state and in a separated state, the discharge roller pair being disposed on the other end side of the processing tray and configured to discharge a sheet that has been subjected to post-processing on the processing tray and a sheet from the conveying roller pair;
- a stack tray on which a sheet discharged by the discharge roller pair is stacked;
- and
- a control part that executes a stapling mode to apply post-processing to a sheet and then discharge the resultant sheet onto the stack tray and a non-stapling mode to discharge a sheet onto the stack tray without applying post-processing to the sheet, wherein
- when a sheet to be discharged is a sheet of a predetermined type in the non-stapling mode, the control part makes a front end of the sheet pass the discharge roller pair in a state where the discharge roller pair is in a separated state and brings the discharge roller pair into a pressure contact state before the sheet front end reaches the stack tray,
- when the sheet to be discharged is a sheet other than the sheet of the predetermined type in the non-stapling mode, the control part makes the front end of the sheet pass the discharge roller pair in a state where the discharge roller pair is in a separated state and brings the discharge roller pair into a pressure contact state after the sheet front end reaches the stack tray, and
- in the stapling mode, the control part makes the sheet front end pass the discharge roller pair in a state where the discharge roller pair is in a separated state and brings the discharge roller pair into a pressure contact state after the sheet is conveyed onto the processing tray.
Dependencies are inferred from the claim text.