Paper cutting apparatus and image forming apparatus

A sheet cutting apparatus for cutting a front end portion opposite to a folded portion of a booklet finished by a center folding processing, comprising:

• a conveying device for conveying said booklet;
• a stopping device for stopping said booklet at a predetermined position;
• a cutting device for cutting said front end portion of said booklet;
• and
• a controlling section to control each of said conveying device, said stopping device and said cutting device;
• wherein said controlling section controls said stopping device so as to variably determine a stopping position of said booklet stopped by said stopping device, based on a number of sheets included in said booklet conveyed to said cutting device by said conveying device.

A sheet cutting apparatus for cutting a front end portion opposite to a folded portion of a booklet finished by a center folding processing, comprising:

• a conveying device for conveying said booklet;
• a stopping device for stopping said booklet at a predetermined position;
• a cutting device for cutting said front end portion of said booklet;
• and
• a controlling section to control each of said conveying device, said stopping device and said cutting device;
• wherein said controlling section automatically determines that a cutting processing of cutting said front end portion of said booklet is not performed, when a number of sheets included in said booklet is set at a number lower than a predetermined number of sheets.

A sheet cutting apparatus for cutting a front end portion opposite to a folded portion of a booklet finished by a center folding processing, comprising:

• a conveying device for conveying said booklet;
• a stopping device for stopping said booklet at a predetermined position;
• a cutting device for cutting said front end portion of said booklet;
• a booklet accommodating device for accommodating said booklet processed by said cutting device;
• and
• a controlling section to control each of said conveying device, said stopping device, said cutting device and said booklet accommodating device;
• wherein, when an execution of a cutting processing operation is selected, said controlling section controls said conveying device so as to convey said booklet processed by said cutting device to said booklet accommodating device, and, when a non-execution of said cutting processing operation is selected, said controlling section controls said conveying device so as to convey said booklet to said booklet accommodating device without performing said cutting processing operation.

A sheet cutting apparatus for cutting a front end portion opposite to a folded portion of a booklet finished by a center folding processing, comprising:

• a conveying device for conveying said booklet;
• a stopping device for stopping said booklet at a predetermined position;
• a cutting device for cutting said front end portion of said booklet;
• a booklet accommodating device for accommodating said booklet processed by said cutting device;
• and
• a controlling section to control each of said conveying device, said stopping device, said cutting device and said booklet accommodating device;
• wherein, when a further execution of an image-forming operation is cancelled in a mid-course of conducting said image-forming operation, said controlling section controls said conveying device so as to convey said booklet to said booklet accommodating device without performing a cutting processing operation by said cutting device.

A sheet cutting apparatus for cutting a front end portion opposite to a folded portion of a booklet finished by a center folding processing, comprising:

• a conveying device for conveying said booklet;
• a stopping device for stopping said booklet at a predetermined position;
• a cutting device for cutting said front end portion of said booklet;
• a booklet accommodating device for accommodating said booklet processed by said cutting device;
• and
• a controlling section to control each of said conveying device, said stopping device, said cutting device and said booklet accommodating device;
• wherein said controlling section applies a magnetizing processing to a driving source for driving said stopping device to keep said stopping device in a fixed state, just before a leading edge portion of said booklet, being conveyed by said conveying device, is batted against a stopping member of said stopping device.

A sheet cutting apparatus for cutting a front end portion opposite to a folded portion of a booklet finished by a center folding processing, comprising:

• a conveying device for conveying said booklet;
• a stopping device for stopping said booklet at a predetermined position;
• a cutting device for cutting said front end portion of said booklet;
• a booklet accommodating device for accommodating said booklet processed by said cutting device;
• and
• a controlling section to control each of said conveying device, said stopping device, said cutting device and said booklet accommodating device;
• wherein said controlling section controls said conveying device so as to simultaneously conduct a conveyance processing of said booklet processed by said cutting device and a feed-in processing of a succeeding booklet, by conveying said succeeding booklet into said cutting device while conveying said booklet processed by said cutting device to said booklet accommodating device.

A sheet cutting apparatus for cutting a front end portion opposite to a folded portion of a booklet finished by a center folding processing, comprising:

• a conveying device for conveying said booklet;
• a stopping device for stopping said booklet at a predetermined position;
• a cutting device for cutting said front end portion of said booklet;
• a booklet accommodating device for accommodating said booklet processed by said cutting device;
• and
• a controlling section to control each of said conveying device, said stopping device, said cutting device and said booklet accommodating device;
• wherein said controlling section adjusts a stopping position of a stopping member of said stopping device corresponding to cutting size set arbitrarily.