Cutting apparatus and image forming apparatus

Patent metadata

Field	Value
Publication number	US-10676305-B2
Application number	US-201715593003-A
Country	US
Kind code	B2
Filing date	May 11, 2017
Priority date	May 31, 2016
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

A cutting apparatus includes a blade configured to cut a sheet that is conveyed along a sheet conveyance path, a scrap path through which scrap generated when the sheet is cut by the blade passes, a guide member configured to guide the sheet conveyed, and a blowing unit configured to blow air such that the air crosses the sheet conveyance path from a side opposite the scrap path with the sheet conveyance path therebetween, wherein the blowing unit blows air such that the air flows along the guide member positioned at a second position at which the scrap is allowed to enter the scrap path.

First claim

What is claimed is:

1. A sheet processing apparatus comprising:
a pair of folding rollers configured to nip and fold a sheet;
a conveying unit configured to convey the folded sheet along a conveyance path;
a first blade;
a second blade configured to cut the folded sheet which has passed through the conveyance path, with the first blade, wherein the first blade and the second blade are disposed above the pair of folding rollers;
a blowing unit configured to blow air to the first blade;
a scrap path through which scrap generated when the sheet is cut by the first and second blades and the air blown from the blowing unit pass and which is arranged under the first and second blades; and
a storage unit configured to store scrap that has passed through the scrap path,
wherein
a virtual horizontal line intersects the scrap path and the conveyance path.

2. The sheet processing apparatus according to claim 1 , further comprising
a guide member configured to be movable to a first position where the guide member blocks the scrap path and the guide member guides the folded sheet conveyed and to a second position where the scrap is allowed to enter the scrap path,
wherein the blowing unit blows air such that the air flows along the guide member at the second position into the scrap path.

3. The sheet processing apparatus according to claim 2 , wherein the guide member is rotatably supported around an end portion on a side opposite to a cutting position at which the first and second blades cut the sheet.

4. The sheet processing apparatus according to claim 2 , wherein, the blowing unit and the scrap path are in airflow communication with each other in a vertical direction in a case where the blowing unit is arranged above the cutting position, the scrap path is arranged below the cutting position, and the guide member is positioned in the second position.

5. The sheet processing apparatus according to claim 2 , wherein the air blown from the blowing unit flows between a guide surface of the guide member and the first blade in a state where the guide member is positioned in the second position.

6. The sheet processing apparatus according to claim 1 , wherein the blowing unit blows air such that the blown air that crosses the conveyance path and flows toward inside of the scrap path flows along a side surface of the first blade.

7. The sheet processing apparatus according to claim 2 , wherein the blowing unit does not blow air while the sheet to be guided by the guide member positioned at the first position is being conveyed.

8. The sheet processing apparatus according to claim 1 , wherein the blowing unit blows air to the first blade at least when the first and second blades cut the folded sheet.

9. The sheet processing apparatus according to claim 1 , wherein the second blade is fixed and the first blade moves relative to the second blade, and
wherein the blowing unit is configured such that air flows along a side surface of the first blade, the side surface extending along a movement direction of the first blade.

10. The sheet processing apparatus according to claim 1 , wherein a second virtual horizontal line intersects at least one roller of the pair of folding rollers and the storage unit.

11. An image forming apparatus comprising:
an image forming unit configured to form an image on a sheet;
a pair of folding rollers configured to nip and fold a sheet, on which an image is formed by the image forming unit, at a nipping portion;
a conveying unit configured to convey the folded sheet along a conveyance path;
a first blade;
a second blade configured to cut the folded sheet which has passed through the conveyance path with the first blade, wherein the first blade and the second blade are disposed above the pair of folding rollers;
a blowing unit configured to blow air to the first blade;
a scrap path through which scrap generated when the sheet is cut by the first and second blades and the air blown from the blowing unit pass and which is arranged under the first and second blades; and
a storage unit configured to store scrap that has passed through the scrap path;
wherein
virtual horizontal line intersects the scrap path and the conveyance path.

Assignees

• Canon Kk

Inventors

• Doi Shigeo

Classifications

• B65H2701/18271

  of folded sheet material · CPC title

• G03G15/6582

  Special processing for irreversibly adding or changing the sheet copy material characteristics or its appearance, e.g. stamping, annotation printing, punching · CPC title

• B65H2301/4229

  cutting piles · CPC title

• B65H45/18

  Oscillating or reciprocating blade folders (carried on rotary members B65H45/16) · CPC title

• B65H2801/27

  Devices located downstream of office-type machines · CPC title