Sheet processing apparatus and image forming apparatus

Patent metadata

Field	Value
Publication number	US-2019010010-A1
Application number	US-201816129366-A
Country	US
Kind code	A1
Filing date	Sep 12, 2018
Priority date	May 31, 2013
Publication date	Jan 10, 2019
Grant date	—

Abstract

A sheet processing apparatus includes a binding unit including a first portion and a second portion and configured to nip a sheet bundle between the first portion and the second portion to deform the sheet bundle in a thickness direction to bind the sheet bundle, and a detachment unit configured to push the bound sheet bundle toward the second portion to detach the bound sheet bundle from the first portion.

First claim

What is claimed is:

1 . A sheet processing apparatus comprising:
a binding unit including a first portion and a second portion, and configured to nip a sheet bundle between the first portion and the second portion to deform the sheet bundle in a thickness direction so as to bind the sheet bundle; and a detachment unit configured to urge the bound sheet bundle toward the second portion to detach the bound sheet bundle from the first portion.

2 . The sheet processing apparatus according to claim 1 , wherein the detachment unit is arranged to detach the bound sheet bundle from the first portion as the first portion and the second portion move apart so as to release the sheet bundle from nipping.

3 . The sheet processing apparatus according to claim 1 , wherein each of the first portion and the second portion includes an uneven portion configured to deform the sheet bundle in the thickness direction by contacting the sheet bundle, and
wherein the detachment unit is moveable to protrude toward the second portion beyond a tip of the uneven portion of the first portion in the thickness direction of the sheet bundle when the first portion and the second portion are separated from each other.

4 . The sheet processing apparatus according to claim 1 ,
wherein the detachment unit is includes an elastic member elastically deformable by being pressed by the sheet bundle to be bound, and wherein the detachment unit is arranged to detach the sheet bundle from the first portion with the aid of a restoring force of the elastic member when the first portion and the second portion are separated from each other.

5 . The sheet processing apparatus according to claim 4 , wherein the elastic member is a plate spring.

6 . The sheet processing apparatus according to claim 4 , wherein the elastic member is a wire spring.

7 . The sheet processing apparatus according to claim 1 ,
wherein each of the first portion and the second portion includes a deformation surface configured to deform the sheet bundle in the thickness direction by contacting the sheet bundle, and wherein the deformation surface of the first portion is formed coarsely compared to the deformation surface of the second portion.

8 . The sheet processing apparatus according to claim 1 , wherein each of the first portion and the second portion includes a deformation surface configured to deform the sheet bundle in the thickness direction by contacting the sheet bundle, and
wherein the detachment unit is disposed outside the deformation surface of the first portion.

9 . The sheet processing apparatus according to claim 8 , including a plurality of the detachment units and,
wherein the deformation surface of the first portion is arranged between the plurality of the detachment units.

10 . The sheet processing apparatus according to claim 1 ,
wherein each of the first portion and the second portion includes a plurality of deformation surfaces configured to deform the sheet bundle in the thickness direction by contacting the sheet bundle, and wherein the detachment unit is disposed between the plurality of deformation surfaces of the first portion.

11 . The sheet processing apparatus according to claim 1 ,
wherein the first portion includes a plurality of teeth configured to deform the sheet bundle in the thickness direction, and wherein the detachment unit is disposed at a location on the sheet processing apparatus distinct from the plurality of teeth.

12 . The sheet processing apparatus according to claim 1 , further comprising a second detachment unit configured to urge the sheet bundle from the second portion toward the first portion so as to detach the bound sheet bundle from the second portion.

13 . The sheet processing apparatus according to claim 1 , further comprising a driving unit configured to move the detachment unit by driving the detachment unit from a position where the first portion and the second portion nip the sheet bundle there between to a position where the first portion and second portion are separated and the detachment unit protrudes toward the second portion.

14 . The sheet processing apparatus according to claim 1 , further comprising a moving unit configured to move one of the first portion and the second portion between a position where the first portion and the second portion nip the sheet bundle therebetween and a release position where the first portion and the second portion are separated from each other so as to release the sheet bundle from nipping.

15 . A sheet processing apparatus comprising:
a first portion; a second portion configured to nip a sheet bundle together with the first portion so as to bind the sheet bundle; and an elastic member disposed on at least one portion of the first portion and the second portion, and configured to be deformed toward the other portion of the first portion and the second portion in a thickness direction of the sheet bundle as the first portion and the second portion are separated from each other.

16 . The sheet processing apparatus according to claim 15 ,
wherein each of the first portion and the second member includes an uneven portion configured to deform the sheet bundle in the thickness direction by contacting the sheet bundle, and wherein the elastic member is moveable to protrude beyond a tip of the uneven portion of the first portion in the thickness direction of the sheet bundle when the first portion and the second portion are separated from each other.

17 . The sheet processing apparatus according to claim 15 ,
wherein the elastic member includes a the plurality of the detachment units contacting the sheet to detach a sheet from the one portion of the first portion and the second portion, wherein each of the first portion and the second portion includes a deformation surface configured to deform the sheet bundle in the thickness direction by contacting the sheet bundle, and wherein the deformation surface of the first portion is arranged between the plurality of the detachment units.

18 . The sheet processing apparatus according to claim 15 ,
wherein each of the first portion and the second portion includes a plurality of deformation surfaces configured to deform the sheet bundle in the thickness direction by contacting the sheet bundle, and wherein the elastic member is disposed between the plurality of deformation surfaces.

19 . The sheet processing apparatus according to claim 15 , further comprising a second elastic member disposed on the other portion of the first portion and the second portion, and configured to be deformed toward the one portion of the first portion and the second portion in the thickness direction of the sheet bundle as the first portion and the second portion are separated from each other.

20 . An image forming apparatus, comprising:
an image forming unit configured to form an image on the sheet; and the sheet processing apparatus according to claim 1 .

Assignees

• Canon Kk

Inventors

• Abe Hideto
• Takemasa Rikiya

Classifications

• B65H2301/43828

  involving simultaneous deformation of at least a part of the articles to be bound · CPC title

• B65H2301/51611

  involving at least a binding element traversing the handled material, e.g. staple · CPC title

• B65H2801/27

  Devices located downstream of office-type machines · CPC title

• B65H37/04 Primary

  for securing together articles or webs, e.g. by adhesive, stitching or stapling (adhering replacement to expiring web during change of web roll B65H19/18) · CPC title

• B65H2301/51616

  involving simultaneous deformation of parts of the material to be bound · CPC title