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US 6,471,429 B1Granted
Sheet processing apparatus for discharging sheets in a bundle
AssigneeCanon Kabushiki Kaisha
InventorsYoshinori Isobe, Katsuhito Kato, Yuzoh Matsumoto
Life of this patent
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Abstract
Sheet processing apparatus including a first tray for stacking sheets received from an image forming apparatus, a discharge unit for discharging the sheets from the first tray in a bundle, a second tray for stacking the sheets discharged from the first tray, a discriminating unit for discriminating an attribute of a sheet to be stacked on the first tray, and a controller for selectively controlling whether or not to discharge sheets by the discharge unit in accordance with a discrimination of the discriminating unit.
Claims42
Sheet processing apparatus comprising:
- a first tray for stacking sheets transported from an upstream;
- a discharge unit for discharging the sheets from said first tray in a bundle;
- a second tray for stacking the sheets discharged from said first tray;
- a discriminating unit for discriminating a material of a sheet to be stacked on said first tray;
- and
- a controller for selectively controlling whether or not said discharge unit discharges in accordance with a discrimination of said discriminating unit.
3 more elements
Sheet processing method for controlling a sheet processing apparatus, said method comprising steps of:
- stacking sheets transported from an upstream on a first tray;
- discriminating a material of a sheet stacked on said first tray;
- and
- selectively controlling whether or not to discharge sheets from said first tray to a second tray in a bundle in accordance with a discrimination of said discriminating step.
1 more element
A recording medium, which includes code for process steps that can be read by a controller of a sheet processing apparatus, said code comprising:
- code for stacking sheets transported from an upstream on a first tray;
- code for discriminating a material of a sheet to be stacked on said first tray;
- and
- code for selectively controlling whether or not to discharge sheets from said first tray to a second tray in a bundle in accordance with a discrimination by said discriminating code.
1 more element
Sheet processing apparatus comprising:
- a first tray for stacking sheets transported from an upstream;
- a discharge unit for discharging the sheets from said first tray in a bundle;
- a second tray for stacking the sheets discharged from said first tray;
- a discriminating unit for discriminating an attribute of a sheet to be stacked on said first tray;
- a jogger for jogging the sheets stacked on the first tray;
- and
- a controller for controlling said jogger not to jog the sheets when the sheet is a thin sheet.
4 more elements
Sheet processing apparatus comprising:
- a first tray for stacking sheets transported from an upstream;
- a discharge unit for discharging the sheets from said first tray in a bundle;
- a second tray for stacking the sheets discharged from said first tray;
- a discriminating unit for discriminating an attribute of a sheet to be stacked on said first tray;
- a counter for weighted counting of sheets stacked on said first tray, with weighting corresponding to a size of the sheet;
- and
- a controller for controlling said discharge unit to discharge sheets in accordance with a count result of said counter exceeding a predetermined value.
4 more elements
Sheet processing apparatus comprising:
- a first tray for stacking sheets transported from an upstream;
- a discharge unit for discharging the sheets from said first tray in a bundle;
- a second tray for stacking the sheets discharged from said first tray;
- a discriminating unit for discriminating a width of a sheet to be stacked on said first tray;
- a jogger for jogging sheets on said first tray;
- and
- a controller for controlling said discharging unit to discharge sheets in accordance with a width of a coming sheet being different from a width of a sheet stacked on said first tray.
4 more elements
Sheet processing apparatus comprising:
- a first tray for stacking sheets transported from an upstream;
- a discharge unit for discharging the sheets from said first tray in a bundle;
- a second tray for stacking the sheets discharged from said first tray;
- a discriminating unit for discriminating whether a sheet is fed from a manual feeding unit;
- and
- a controller for controlling said discharging unit to discharge a first predetermined number of sheets when it is discriminated that the sheets are being fed from a feeding unit other than the manual feeding unit and to discharge a second predetermined number of sheets, which is smaller than the first predetermined number of sheets, when it is discriminated that the sheet are being fed from the manual feeding unit.
3 more elements
Sheet processing apparatus comprising:
- a first tray for stacking sheets transported an upstream;
- a discharge unit for discharging the sheets from said first tray in a bundle;
- a second tray for stacking the sheets discharged from said first tray, said second tray moving vertically;
- a stopper for preventing a succeeding bundle of sheets from dragging the sheet stacked on said second tray, said stopper moving away from said second tray when said second tray moves down;
- and
- a controller for controlling said second tray to move down in accordance with a sheet being discharged onto said second tray and to move up after a top of stack on said second tray locates below said stopper.
3 more elements
Sheet processing apparatus comprising:
- a first tray for stacking sheets transported from an upstream;
- a discharge unit for discharging the sheets from said first tray in a bundle;
- a second tray for stacking the sheets discharged from said first tray, said second tray moving vertically;
- and
- a controller for controlling said discharge unit;
- wherein said discharging unit includes a belt having a protrusion for moving sheets in a bundle toward said second tray, wherein said belt rotates for discharging sheets stacked on said first tray, and wherein said controller controls said second tray to move down before said protrusion passes by said second tray and to move up after said protrusion passes by said second tray.
3 more elements
Sheet processing apparatus comprising:
- a first tray for stacking sheets transported from an upstream;
- a discharge unit for discharging the sheets from said first tray in a bundle;
- a second tray for stacking the sheets discharged from said first tray;
- image forming means for forming an image on a sheet to be discharged onto said first tray;
- a stapler for stapling sheets stacked on said first tray;
- a detector for detecting a sheet stacked on said second tray;
- a designation unit for designating that said stapler staples sheets;
- and
- an indicator for indicating that a sheet stacked on said second tray should be removed before said image forming means starts an image formation in accordance with a sheet being detected by said detector when said designation unit designates stapling,
- wherein said indicator will not indicate that a sheet stacked on said second tray should be removed before said image forming means starts the image formation when said designation unit does not designate stapling even if a sheet is detected by said detector.
7 more elements
Sheet processing apparatus comprising:
- a first tray for stacking sheets transported from an upstream direction;
- a discharge unit for discharging the sheets from said first tray in a bundle;
- a second tray for stacking the sheets discharged from said first tray;
- a discriminating unit for discriminating an attribute of a sheet to be stacked on said first tray;
- and
- a controller for controlling said discharge unit to discharge sheets when an amount of sheet stacked on said first tray reaches a maximum amount,
- wherein the maximum amount, in a case where the attribute of each sheet to be stacked on said first tray is the same, is different from the maximum amount, in a case where the attribute of at least one sheet to be stacked on said first tray is different from the attribute of another sheet to be stacked on said first tray.
4 more elements
Sheet processing apparatus comprising:
- a first tray for stacking sheets transported from an upstream direction;
- a discharge unit for discharging the sheets from said first tray in a bundle;
- a second tray for stacking the sheets discharged from said first tray;
- a discriminating unit for discriminating an attribute of a sheet to be stacked on said first tray;
- and
- a controller for controlling said discharge unit to discharge a maximum amount of sheets being stacked on said first tray, the maximum amount being determined based on a plurality of sizes of sheets to be stacked on said first tray.
3 more elements
Dependencies are inferred from the claim text.