Sheet processing apparatus and image forming system having the same

A sheet processing apparatus that receives a sheet discharged from an image forming apparatus comprising first conveying means for conveying a sheet, on which is formed an image, at a first conveying speed and with a first conveying force, second conveying means disposed downstream of the first conveying means in a sheet conveying direction, for conveying the sheet at a second conveying speed higher than the first conveying speed and with a second conveying force smaller the first conveying force, and determination means for determining whether a trailing end of the sheet is released from the first conveying means, the sheet processing apparatus comprising:

• third conveying means for conveying the received sheet;
• and
• conveying speed setting means for setting a conveying speed of said third conveying means to the first conveying speed while the sheet is being conveyed by all of the first conveying means, the second conveying means, and said third conveying means, and for setting the conveying speed of said third conveying means to the second conveying speed after the determination means determines that the trailing end of the sheet is released from the first conveying means,
• wherein said conveying speed setting means sets the conveying speed of said third conveying means to the second conveying speed when the determination means determines that the trailing end of the sheet is released from the first conveying means before a leading end of the sheet reaches said third conveying means.

A sheet processing apparatus that receives a sheet discharged from an image forming apparatus comprising first conveying means for conveying a sheet on which is formed an image at a first conveying speed and with a first conveying force, second conveying means disposed downstream of the first conveying means in a sheet conveying direction, for conveying the sheet at a second conveying speed higher than the first conveying speed and with a second conveying force smaller than the first conveying force, and determination means for determining whether a trailing end of the sheet is released from the first conveying means, the sheet processing apparatus comprising:

• third conveying means for conveying the received sheet;
• and
• conveying speed setting means for setting a conveying speed of said third conveying means to the first conveying speed or the second conveying speed according to information on a size of the sheet received from the image forming apparatus,
• wherein said conveying speed setting means sets the conveying speed of said third conveying means to the second conveying speed when a sheet length indicated by the information on the size of the she received from the image forming apparatus is smaller than a predetermined length, and said conveying speed setting means sets the conveying speed of said third conveying means to the first conveying speed when the sheet length indicated by the information on the size of the sheet received from the image forming apparatus is equal to or greater than the predetermined length.

An image forming system comprising an image forming apparatus and a sheet processing apparatus, wherein:

• said image forming apparatus comprises:
• first conveying means for conveying a sheet on which is formed an image at a first conveying speed and with a first conveying force;
• second conveying means disposed downstream of the first conveying means in a sheet conveying direction, for conveying the sheet at a second conveying speed higher than the first conveying speed and with a second conveying force smaller than the first conveying force;
• and
• determination means for determining whether a trailing end of the sheet is released from the first conveying means;
• and
• wherein:
• said sheet processing apparatus comprises:
• third conveying means for conveying the received sheet;
• and
• conveying speed setting means for setting a conveying speed of said third conveying means to the first conveying speed while the sheet is being conveyed by all of the first conveying means, the second conveying means, and said third conveying means, and for setting the conveying speed of said third conveying means to the second conveying speed after the determination means determines at the trailing end of the sheet is released from the first conveying means.

An image forming system comprising an image forming apparatus and a sheet processing apparatus, wherein:

• said image forming apparatus comprises:
• first conveying means for conveying a sheet on which is formed an image at a first conveying speed and with a first conveying force;
• second conveying means disposed downstream of the first conveying means in a sheet conveying direction, for conveying the sheet at a second conveying speed higher than the first conveying speed and with a second conveying force smaller than the first conveying force;
• and
• determination means for determining whether a trailing end of the sheet is released from the first conveying means;
• and
• wherein:
• said sheet processing apparatus comprises:
• third conveying means for conveying the received sheet;
• and
• conveying speed setting means for setting a conveying speed of said third conveying means to the first conveying speed or the second conveying speed according to information on a size of the sheet received from the image forming apparatus,
• wherein said conveying speed setting means sets the conveying speed of said third conveying means to the second conveying speed when a sheet length indicated by the information on the size of the sheet received from the image forming apparatus is smaller than a predetermined length, and said conveying speed setting means sets the conveying speed of said third conveying means to the first conveying speed when the sheet length indicated by the information on the size of the sheet received from the image forming apparatus is equal to or greater than the predetermined length.

A sheet processing apparatus that receives a sheet discharged from an image forming apparatus comprising a first conveying device that conveys a sheet on which is formed an image at a first conveying speed and with a first conveying force, a second conveying device that is disposed downstream of the first conveying device in a sheet conveying direction, and conveys the sheet at a second conveying speed higher than the first conveying speed and with a second conveying force smaller than the first conveying force, and a determination device that determines whether a trailing end of the sheet is released from the first conveying device, the sheet processing apparatus comprising:

• a third conveying device and conveys the received sheet;
• and
• a conveying speed setting device that sets a conveying speed of said third conveying device to the first conveying speed or the second conveying speed according to information on a size of the sheet received from the image forming apparatus,
• wherein said conveying said setting device sets the conveying speed of said third conveying device to the second conveying speed when a sheet length indicated by the information on the size of the sheet received from the image forming apparatus is smaller than a predetermined length, and said conveying speed setting device sets the conveying speed of said third conveying device to the first conveying speed when the sheet length indicated by the information on the size of the sheet received from the image forming apparatus is equal to or greater than the predetermined length.

An image forming system comprising an image forming apparatus and a sheet processing apparatus, wherein:

• said image forming apparatus comprises:
• a first conveying device that conveys a sheet on which is formed an image at a first conveying speed and with a first conveying force;
• a second conveying device that is disposed downstream of the first conveying device in a sheet conveying direction, and conveys the sheet at a second conveying speed higher than the first conveying speed and with a second conveying force smaller than the first conveying force;
• and
• a determination device that determines whether a trailing end of the sheet is released from the first conveying device;
• and
• wherein:
• said sheet processing apparatus comprises:
• a third conveying device for conveying the received sheet;
• and
• a conveying speed setting device for setting a conveying speed of said third conveying device to the first conveying speed while the sheet is being conveyed by all of the first conveying devices, the second conveying device, and said third conveying device, and for setting the conveying speed of said third conveying device to the second conveying speed after the determination device determines that the trailing end of the sheet is released from the first conveying device.

An image forming system comprising an image forming apparatus and a sheet processing apparatus, wherein:

• said image forming apparatus comprises:
• a first conveying device that conveys a sheet on which is formed an image at a first conveying speed and with a first conveying force;
• a second conveying device that is disposed downstream of the first conveying device in a sheet conveying direction, and conveys the sheet at a second conveying speed higher than the first conveying speed and with a second conveying force smaller than the first conveying force;
• and
• a determination device that determines whether a trailing end of the sheet is released from the first conveying device;
• and
• wherein:
• said sheet processing apparatus comprises:
• a third conveying device for conveying the received sheet;
• and
• a conveying speed setting device for setting a conveying speed of said third conveying device to the first conveying speed or the second conveying speed according to information on a size of the sheet received from the image forming apparatus,
• wherein said conveying speed setting device sets the conveying speed of said third conveying device to the second conveying speed when a sheet length indicated by the information on the size of the sheet received from the image forming apparatus is smaller than a predetermined length, and said conveying speed setting device sets the conveying speed of said third conveying device to the first conveying speed when the sheet length indicated by the information on the size of the sheet received from the image forming apparatus is equal to or greater than the predetermined length.

A sheet processing apparatus that receives a sheet discharged from an image forming apparatus comprising a first conveying device that conveys a sheet, on which is formed an image, at a first conveying speed and with a first conveying force, a second conveying device disposed downstream of the first conveying device in a sheet conveying direction, and conveys the sheet at a second conveying speed higher than the first conveying speed and with a second conveying force smaller than the first conveying force, and a determination device that determines whether a trailing end of the sheet is released from the first conveying device, the sheet processing apparatus comprising:

• a third conveying device that conveys the received sheet;
• and
• a conveying speed setting device that sets a conveying speed of said third conveying device to the first conveying speed while the sheet is being conveyed by all of the first conveying device, the second conveying device, and said third conveying device, and sets the conveying speed of said third conveying device to the second conveying speed after the determination device determines that the trailing end of the sheet is released from the first conveying device,
• wherein said conveying speed setting device sets the conveying speed of said third conveying device to the second conveying speed when the determination device determines that the trailing end of the sheet is released from the first conveying device before a leading end of the sheet reaches said third conveying device.