Sheet processing apparatus and image forming system

Patent metadata

Field	Value
Publication number	US-11275335-B2
Application number	US-202017133893-A
Country	US
Kind code	B2
Filing date	Dec 24, 2020
Priority date	Dec 26, 2019
Publication date	Mar 15, 2022
Grant date	Mar 15, 2022

Abstract

A sheet processing apparatus includes a transport path to guide a sheet transported in a predetermined transport direction, a rotating body pair capable of transporting the sheet in a first direction for nipping the sheet transported to the transport path thereby drawing the sheet to perform folding processing, and in a second direction for switching back the sheet to return to one direction side in the transport direction, a press member for pressing the sheet folded by the rotating body pair in the second direction, and a support portion for supporting the press member, where the support portion is disposed on the side opposite to the rotating body pair with the transport path therebetween and on the other direction side opposite to the one direction side in the transport direction with a nip line for connecting between the nip portion and a front end portion of the folding blade therebetween.

First claim

The invention claimed is:

1. A sheet processing apparatus for performing folding processing in a plurality of portions of a sheet and performing the folding processing so that one end of the sheet exists inside the sheet folded, comprising:
a transport path including a guide face to guide a sheet transported in a predetermined transport direction;
a rotating body pair adapted to be able to transport the sheet in a first direction for nipping the sheet transported to the transport path by a nip portion to rotate, and thereby drawing the sheet to perform folding processing, and in a second direction for switching back the sheet subjected to the folding processing in a direction opposite to the direction for drawing;
a folding blade adapted to push the sheet transported to the transport path to the nip portion of the rotating body pair;
a press member adapted to press the sheet, which is subjected to the folding processing by the rotating body pair and is transported in the second direction, to one direction side that is one of the transport direction and a direction opposite to the transport direction; and
a support portion adapted to support the press member,
wherein the support portion is disposed on a side opposite to the rotating body pair with the transport path therebetween and on an other direction side opposite to the one direction side in the transport direction with a nip line for connecting between the nip portion and a front end portion of the folding blade therebetween.

2. The sheet processing apparatus according to claim 1 , wherein the press member is capable of rotating around the support portion as a support.

3. The sheet processing apparatus according to claim 2 , wherein the support portion is disposed between the nip line and a line, parallel with the nip line, passing through a rotation shaft of a rotating body disposed on the other direction side with the nip line sandwiched in the rotating body pair.

4. An image forming system comprising:
an image forming apparatus adapted to form an image on a sheet; and
a sheet processing apparatus adapted to perform folding processing on the sheet fed from the image forming apparatus,
wherein the sheet processing apparatus is the sheet processing apparatus according to claim 1 .

5. A sheet processing apparatus for performing folding processing in a plurality of portions of a sheet and performing the folding processing so that one end of the sheet exists inside the sheet folded, comprising:
a transport path including a guide face to guide a sheet transported in a predetermined transport direction;
a transport section adapted to be able to transport the sheet in a first direction for drawing the sheet transported to the transport path, and in a second direction for switching back the drawn sheet in a direction opposite to the direction for drawing;
a rotating body pair adapted to nip the sheet transported to the transport path by a nip portion to rotate, and thereby perform folding processing on the sheet;
a folding blade adapted to push the sheet transported to the transport path to the nip portion of the rotating body pair;
a press member adapted to press the sheet, which is subjected to the folding processing by the rotating body pair and is transported in the second direction, to one direction side that is one of the transport direction and a direction opposite to the transport direction; and
a support portion adapted to support the press member,
wherein the support portion is disposed on a side opposite to the rotating body pair with the transport path therebetween and on an other direction side opposite to the one direction side in the transport direction with a nip line for connecting between the nip portion and a front end portion of the folding blade therebetween.

6. The sheet processing apparatus according to claim 5 , wherein the press member is capable of rotating around the support portion as a support.

7. The sheet processing apparatus according to claim 6 , wherein the support portion is disposed between the nip line and a line, parallel with the nip line, passing through a rotation shaft of a rotating body disposed on the other direction side with the nip line sandwiched in the rotating body pair.

8. An image forming system comprising:
an image forming apparatus adapted to form an image on a sheet; and
a sheet processing apparatus adapted to perform folding processing on the sheet fed from the image forming apparatus,
wherein the sheet processing apparatus is the sheet processing apparatus according to claim 5 .

9. A sheet processing apparatus for performing folding processing in a plurality of portions of a sheet and performing the folding processing so that one end of the sheet exists inside the sheet folded, comprising:
a transport path including a guide face to guide a sheet transported in a predetermined transport direction;
a rotating body pair adapted to be able to transport the sheet in a first direction for nipping the sheet transported to the transport path by a nip portion to rotate, and thereby drawing the sheet to perform folding processing, and in a second direction for switching back the sheet subjected to the folding processing in a direction opposite to the direction for drawing;
a folding blade adapted to push the sheet transported to the transport path to the nip portion of the rotating body pair;
a direction change member adapted to change a direction of the sheet, which is subjected to the folding processing by the rotating body pair and is transported in the second direction, to one direction side that is one of the transport direction and a direction opposite to the transport direction; and
a support portion adapted to support the direction change member,
wherein the support portion is disposed on a side opposite to the rotating body pair with the transport path therebetween and on an other direction side opposite to the one direction side in the transport direction with a nip line for connecting between the nip portion and a front end portion of the folding blade therebetween.

10. The sheet processing apparatus according to claim 9 , wherein the direction change member is capable of rotating around the support portion as a support.

11. The sheet processing apparatus according to claim 10 , wherein the support portion is disposed between the nip line and a line, parallel with the nip line, passing through a rotation shaft of a rotating body disposed on the other direction side with the nip line sandwiched in the rotating body pair.

12. An image forming system comprising:
an image forming apparatus adapted to form an image on a sheet; and
a sheet processing apparatus adapted to perform folding processing on the sheet fed from the image forming apparatus,
wherein the sheet processing apparatus is the sheet processing apparatus according to claim 9 .

13. A sheet processing apparatus for performing folding processing in a plurality of portions of a sheet and performing the folding processing so that one end of the sheet exists inside the sheet folded, comprising:
a transport path including a guide face to guide a sheet transported in a predetermined transport direction;
a transport section adapted to be able to transport the sheet in a first direction for drawing the sheet transported to the transport path, and in a second direction for switching back the drawn sheet in a direction opposite to the direction for drawing;
a rotating body pair adapted to nip the sheet transported to the transport path by a nip portion to rotate, and thereby perform folding processing on the sheet;
a folding blade adapted to push the sheet transported to

Assignees

• Katayama Takuya
• Canon Finetech Nisca Inc

Inventors

• Katayama Takuya

Classifications

• B65H2801/27

  Devices located downstream of office-type machines · CPC title

• B65H2403/942

  Bidirectional powered handling device · CPC title

• G03G2215/00877

  Folding device · CPC title

• B65H37/06

  for folding · CPC title

• B65H2404/693

  Retractable guiding means, i.e. between guiding and non guiding position · CPC title