Manufacturing container or tube from paper; or other manufacturi – Assembling or disassembling of distinct members – Comprising bringing two members together
Reexamination Certificate
1999-05-13
2001-05-01
Vo, Peter (Department: 3721)
Manufacturing container or tube from paper; or other manufacturi
Assembling or disassembling of distinct members
Comprising bringing two members together
C493S320000, C493S385000, C493S325000
Reexamination Certificate
active
06224529
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a sheet processing apparatus for fetching sequentially sheets on which images are formed by an image forming apparatus such as, e.g., photocopiers, printers, and so on, stapling the plural sheets with a stapling means, and folding the sheets in folio and an image forming apparatus.
2. Description of Related Art
Today some image forming apparatus such as photocopiers or the like can do bookbinding by stapling plural sheets and folding the sheets in folio where connected with a sheet processing apparatus. Such a sheet processing apparatus capable of bookbinding fetches sequentially the sheets on which images are formed at the image forming apparatus body, staples the sheets at about the center of the sheet bundle upon driving the stapler unit, and folds the sheets in folio where the sheets are conveyed to a folding means.
As a structure for folding the sheets in folio, it is structured by a folding roller means made of a roller pair, and a projecting means made of a projecting plate and so on. The projecting plate fold the sheet bundle upon projecting the stapled position of the sheet bundle between the nip portions, and the folded sheet bundle is pressed and conveyed by the roller pair to fold the bundle in folio. Therefore, the sheet bundles delivered to the delivery tray are delivered in a state that the sheet bundles are folded in folio and bound in a book form at the center stapled position of the sheets.
The staple operation is done by driving a forming portion to an anvil opposing with respect to the sheet path, and at that time, a staple fastening the sheet bundle may remain as fitted in a groove on the anvil. If the sheet bundle is conveyed as it is, the staple may be trapped to cause conveyance failures.
This invention is made with respect to the above viewpoint, and it is an object to provide a sheet processing apparatus and an image forming apparatus using this to prevent occurrence of conveyance failures in which after the staple operation the staple is trapped in the groove on the anvil.
SUMMARY OF THE INVENTION
A representative structure of the invention to accomplish the above object is characterized in a sheet processing apparatus for stapling multiple sheets with a stapling means and delivering the sheets in folio, including: staple driving means; stapling means having an anvil opposed to the staple driving means with respect to a sheet path; and shifting means for shifting the sheet as to escape a staple from a groove on the anvil after the sheet is stapled by drive of the staple driving means.
In another representative structure of the invention, a sheet processing means for stapling plural sheets with staples includes: a sheet conveyance way for conveying sheets; staple driving means disposed on one side of the sheet conveyance way; an anvil disposed on the other side of the sheet conveyance way as to opposite to the staple driving means; and pressing means disposed on the same side of the anvil for pressing the sheets to the sheet conveyance way on the side to which the staple driving means disposed.
With the above structures, after the work for hitting staples by the staple driving means, the sheets move in a separating direction from the anvil by the shifting means or pressing means, so that the staple can surely escape from the groove on the anvil, thereby preventing the sheet conveyance failures due to snagging of the staples from occurring.
The pressing means rocks around a prescribed position as a rotational center, and a pressing portion presses the sheets in projecting in the sheet conveyance way, so that the sheet pressing work can be done surely with a simple structure.
Where the pressing portion of the pressing means is made of a roller, the friction between the sheet and the pressing mean can be made smaller. Where the sheet conveyance way is disposed vertically, the sheets fall by their weight when pressed by the pressing means even where the staple is trapped in the groove after the staple is hit by the staple driving means, so that no other conveying means is required.
The above sheet processing apparatus can have an image forming means body to form images on sheets to structure an image forming apparatus having substantially the same advantages.
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patent: 5772197 (1998-06-01), Aoki et al.
patent: 5826158 (1998-10-01), Hirano et al.
patent: 5944645 (1999-08-01), Kobayashi
patent: 5971383 (1999-10-01), Horikawa et al.
patent: 5997694 (1999-12-01), Schiel et al.
patent: 6003853 (1999-12-01), Nakazawa et al.
Adachi Seiichiro
Honmochi Hiroki
Murata Mitsushige
Sasa Kazunori
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Tawfik Sam
Vo Peter
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