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US 5,700,002 AGranted
Sheet-bundle processing apparatus in which sheets are aligned using variable pressing force
AssigneeCanon Kabushiki Kaisha
InventorsKatsuhito Kato, Seiichiro Adachi
Life of this patent
Estimating the term…
Abstract
A sheet processing apparatus has at least one sheet receiving tray for accommodating sheets; a sheet discharge device for discharging the sheets onto the sheet receiving tray; an aligning device that presses end surfaces of the sheets accommodated in the sheet receiving tray to align the sheets; and a processing device for binding the sheets accommodated in the sheet receiving tray, wherein the pressing force in the widthwise direction of the sheets exerted by the aligning device is changed in accordance with the change in mode of the process when the processing device performs the process.
Claims40
A sheet processing apparatus comprising:
- at least one sheet receiving tray for accommodating sheets;
- sheet discharge means for discharging the sheets onto said at least one sheet receiving tray;
- aligning means for pressing end surfaces of the sheets accommodated in said at least one sheet receiving tray to align the sheets;
- processing means for processing the sheets accommodated in said at least one sheet receiving tray;
- and
- control means for controlling said aligning means and for changing a pressing force in the widthwise direction of the sheets exerted by said aligning means in accordance with a change in mode of a process performed by processing means.
3 more elements
A sheet processing apparatus comprising:
- at least one sheet receiving tray for accommodating one or more sheets;
- sheet discharge means for discharging the sheets onto said at least one sheet receiving tray forming a sheet bundle;
- aligning means for pressing end surfaces of the sheets accommodated in said at least one sheet receiving tray to align the sheets;
- processing means for processing the sheets accommodated in said at least one sheet receiving tray;
- and
- control means for changing a pressing force in the widthwise direction of the sheets exerted by said aligning means in accordance with a change in the number of sheet bundles accommodated on said at least one sheet receiving tray when said processing means performs processing.
3 more elements
A sheet processing apparatus comprising:
- at least one sheet receiving tray for accommodating one or more sheets;
- sheet discharge means for discharging the sheets onto said at least one sheet receiving tray forming a sheet bundle;
- aligning means for pressing end surfaces of the sheets accommodated in said sheet receiving tray to align the sheets;
- processing means for processing the sheets accommodated in said at least one sheet receiving tray, wherein said aligning means has a first mode for aligning each sheet after the sheet is discharged and a second mode for aligning a sheet bundle when the sheet bundle is bound;
- and
- control means for controlling a pressing force in the widthwise direction of the sheets exerted by said aligning means, such that the pressing force in the second mode is less than the pressing force exerted in the first mode.
3 more elements
A sheet processing apparatus comprising:
- at least one sheet receiving tray for accommodating one or more sheets;
- sheet discharge means for discharging the sheets onto said at least one sheet receiving tray, forming a sheet bundle;
- aligning means for pressing end surfaces of the sheets accommodated in said at least one sheet receiving tray to align the sheets;
- processing means for processing the sheets accommodated in said at least one sheet receiving tray;
- and
- control means for determining a position at which processing is performed by said processing means in relation to a position at which alignment is performed by said aligning means and for controlling said aligning means in accordance with the determination, such that (i) when the position at which processing is performed by said processing means is distant from a position at which alignment is performed by said aligning means, said control means causes said aligning means to press the end surfaces of the sheets to align the sheets when said processing means performs processing, and (ii) when the position at which processing is performed by said processing means is near the position at which alignment is performed by said aligning means, said control means causes said aligning means to be located apart from the end surfaces of the sheets when said processing means performs processing.
3 more elements
A sheet processing apparatus comprising:
- at least one sheet receiving tray for accommodating one or more sheets;
- sheet discharge means for discharging the sheets onto said at least one sheet receiving tray forming a sheet bundle;
- aligning means for pressing end surfaces of the sheets accommodated in said at least one sheet receiving tray to align the sheets;
- processing means for processing the sheets accommodated in said at least one sheet receiving tray;
- and
- control means for determining a number of sheet bundles and for controlling said aligning means in accordance with the determination, such that (i) when the number of sheet bundles is large, said control means causes said aligning means to press the end surfaces of the sheets to align the sheets when said processing means performs processing, and (ii) when the number of sheet bundles is small, said control means causes said aligning means to be located apart from the end surfaces of the sheets when said processing means performs processing.
3 more elements
A sheet processing apparatus comprising:
- at least one sheet receiving tray for accommodating sheets;
- sheet discharge means for discharging the sheets onto each of said at least one sheet receiving tray forming a sheet bundle;
- aligning means for pressing end surfaces of the sheets accommodated in said at least one sheet receiving tray to align the sheets;
- processing means for processing the sheets accommodated in said sheet receiving tray, wherein said aligning means operates in a first mode when the sheet is discharged and operates in a second mode when the sheet bundle is processed;
- and
- control means for determining whether said aligning means is operating in the first mode or the second mode and controlling said aligning means in accordance with the determination, such that (i) said control means causes said aligning means to press the end surfaces of the sheets when said aligning means is in the first mode;
- and (ii) said control means causes said aligning means to be located apart from the end surfaces of the sheets when said aligning means is in the second mode.
4 more elements
An image forming apparatus having a sheet processing apparatus, said image forming apparatus comprising:
- image forming means;
- at least one sheet receiving tray for accommodating sheets on which images have been formed;
- sheet discharge means for discharging the sheets onto said at least one sheet receiving tray;
- aligning means for pressing end surfaces of the sheets accommodated in each of said at least one sheet receiving tray to align the sheets;
- processing means for processing the sheets accommodated in each of said at least one sheet receiving tray;
- and
- control means for changing the pressing forces in the widthwise direction of the sheets by said aligning means in accordance with a change in mode of said processing means when said processing means performs processing.
4 more elements
An image forming apparatus having a sheet processing apparatus, said image forming apparatus comprising:
- image forming means;
- at least one sheet receiving tray for accommodating sheets on which images have been formed;
- sheet discharge means for discharging the sheets onto said at least one sheet receiving tray;
- aligning means for pressing end surfaces of the sheets accommodated in said at least one sheet receiving tray to align the sheets;
- processing means for processing the sheets accommodated in said at least one sheet receiving tray;
- and
- control means for controlling the pressing force in the widthwise direction of the sheets by said aligning means in accordance with a change in a number of sheet bundles when said processing means performs processing.
4 more elements
An image forming apparatus having a sheet processing apparatus, said image forming apparatus comprising:
- image forming means;
- at least one sheet receiving tray for accommodating sheets on which images have been formed;
- sheet discharge means for discharging the sheets onto said at least one sheet receiving tray forming sheet bundles;
- aligning means for pressing end surfaces of the sheets accommodated in said at least one sheet receiving tray to align the sheets;
- processing means for processing the sheets accommodated in said sheet receiving tray, wherein said aligning means operates in a first mode when the sheet is discharged and operates in a second mode when the sheet bundle is processed;
- and
- control means for determining whether said aligning means is operating in the first mode or the second mode and for controlling said aligning means in accordance with the determination, such that the pressing force in the widthwise direction of the sheets by said aligning means in the second mode is less than pressing force in the first mode.
4 more elements
An image forming apparatus having a sheet processing apparatus, said image forming apparatus comprising:
- image forming means;
- at least one sheet receiving tray for accommodating sheets on which images have been formed;
- sheet discharge means for discharging the sheets onto said at least one sheet receiving tray;
- aligning means for pressing end surfaces of the sheets accommodated in said at least one sheet receiving tray to align the sheets;
- processing means for processing the sheets accommodated in said at least one sheet receiving tray;
- and
- control means for determining a position at which processing is performed and for controlling said aligning means in accordance with the determination, such that (i) when the position at which processing is performed by said processing means is distant from a position at which alignment is performed by said aligning means, said control means causes said aligning means to press the end surfaces of the sheets to align the sheets when said processing means performs processing, and (ii) when the position at which processing is performed by said processing means is near the position at which alignment is performed by said aligning means, said control means causes said aligning means to be located apart from the end surfaces of the sheets when said processing means performs processing.
4 more elements
An image forming apparatus having a sheet processing apparatus, said image forming apparatus comprising:
- image forming means;
- at least one sheet receiving tray for accommodating sheets on which images have been formed;
- sheet discharge means for discharging the sheets onto said at least one sheet receiving tray forming sheet bundles;
- aligning means for pressing end surfaces of the sheets accommodated in said at least one sheet receiving tray to align the sheets;
- processing means for processing the sheets accommodated in said at least one sheet receiving tray;
- and
- control means for determining a number of sheet bundles and for controlling said aligning means in accordance with the determination, such that (i) when the number of sheet bundles is large, said control means causes said aligning means to press the end surfaces of the sheets to align the sheets when said processing means performs processing, and (ii) when the number of sheet bundles is small, said control means causes said aligning means to be located apart from the end surfaces of the sheets when said processing means performs processing.
4 more elements
An image forming apparatus having a sheet processing apparatus, said image forming apparatus comprising:
- image forming means;
- at least one sheet receiving tray for accommodating sheets on which images have been formed;
- sheet discharge means for discharging the sheets onto said at least one sheet receiving tray;
- aligning means for pressing end surfaces of the sheets accommodated in said at least one sheet receiving tray to align the sheets;
- processing means for processing the sheets accommodated in said sheet receiving tray, wherein said aligning means operates in a first mode when the sheet is discharged and operates in a second mode when the sheet bundle is processed;
- and
- control means for determining whether said aligning means is operating in the first mode or the second mode and for controlling said aligning means in accordance with the determination, such that (i) said control means causes said aligning means to press the end surfaces of the sheets to align the sheets when said aligning means is in the first mode when said processing means performs processing, and (ii) said control means causes said aligning means to be located apart from the end surfaces of the sheets when said aligning means is in the second mode when said processing means performs processing.
4 more elements
Dependencies are inferred from the claim text.