Sheet binding processing apparatus and post-processing apparatus having the same

Patent metadata

Field	Value
Publication number	US-2016107409-A1
Application number	US-201514886379-A
Country	US
Kind code	A1
Filing date	Oct 19, 2015
Priority date	Oct 20, 2014
Publication date	Apr 21, 2016
Grant date	—

Abstract

The present invention is to provide a binding processing apparatus that prevents easy unbinding regardless of thickness of a sheet bundle to be bound and that lessens influence of damage on sheets. In the present sheet binding processing apparatus, a pair of pressurizing faces for pressure-nipping a sheet bundle are formed to have tooth forms each having a convex shape and a concave shape, the tooth forms being engaged with each other along a predetermined tooth width, and the tooth forms are shaped so that an engagement depth between a tooth top and a tooth root is varied along a tooth width direction toward a sheet end edge.

First claim

1 . A sheet binding processing apparatus to perform a pressure-contact binding as pressure-nipping a plurality of sheets in a front-back direction of the sheets with a pair of pressurizing faces, comprising:
a pair of pressurizing members having the pressurizing faces; and a driving device that causes at least one of the pressurizing faces to reciprocate between a waiting position being apart from the sheets and an operating position for pressurizing the sheets, wherein the pair of pressurizing faces are formed to have tooth forms each having a convex shape and a concave shape, the tooth forms being engaged with each other along a predetermined tooth width, and the tooth forms are shaped so that an engagement depth between a tooth top and a tooth root is varied along a tooth width direction toward a sheet end edge.

2 . The sheet binding processing apparatus according to claim 1 ,
wherein a plurality of tooth forms are arranged at each pressurizing face in a line with each tooth width direction oriented to a sheet end edge.

3 . The sheet binding processing apparatus according to claim 2 ,
wherein a first tooth form line arranged at a sheet end edge side and a second tooth form line arranged at a sheet center side are formed at each pressurizing face, and an engagement depth of the first tooth form line and an engagement depth of the second tooth form line are different from each other.

4 . The sheet binding processing apparatus according to claim 1 ,
wherein at least one of the pressurizing faces formed at the pair of pressurizing members is inclined in the tooth width direction.

5 . The sheet binding processing apparatus according to claim 1 ,
wherein a step is formed in the tooth width direction at least on one of the pressurizing faces.

6 . The sheet binding processing apparatus according to claim 1 ,
wherein the tooth forms on the pair of pressurizing faces are shaped so that an engagement depth at a sheet end edge side is larger than an engagement depth at a sheet center side.

7 . The sheet binding processing apparatus according to claim 2 ,
wherein a first tooth form line arranged at a sheet end edge side and a second tooth form line arranged at a sheet center side are formed at each pressurizing face, and a length of the first tooth form line is shorter than a length of the second tooth form line.

8 . A post-processing apparatus, comprising:
a processing tray on which sheets fed from the upstream side are stacked and stored; a sheet binding processing unit arranged at the processing tray; and a stack tray on which sheets discharged from the processing tray are stored, wherein the sheet binding processing unit is the sheet binding processing apparatus according to claim 1 .

Assignees

• Nisca Corp

Inventors

• Kubo Mamoru

Classifications

• B31F2201/00

  Mechanical deformation of paper or cardboard without removing material · CPC title

• G03G2215/00852

  Temporary binding · CPC title

• B31F1/07

  Embossing {, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles}({B31F1/128 takes precedence;} corrugating B31F1/20; embossing in combination with printing B41F19/02, B41M1/24; typewriters for embossing B41J3/38; stamping in combination with deforming B41K3/36) · CPC title

• B31F5/02 Primary

  by crimping or slotting {or perforating} · CPC title

• B42F3/00

  Sheets temporarily attached together involving perforations; Means therefor; Sheet details therefor (staples, fasteners in general F16B) · CPC title