Method and apparatus for punching a hole in a stack of sheets in

Details Method and apparatus for punching a hole in a stack of sheets in Method and apparatus for punching a hole in a stack of sheets in

1994-05-19

1996-04-16

Braun, Fred L.

Photocopying

Contact printing

Light boxes

227 2, 270 53, G03G 2100

Patent

active

055087990

ABSTRACT:
A method and apparatus for punching holes in a stack of sheets using a hole puncher. The method includes the steps of activating the hole puncher, determining whether the hole puncher has completely punched a hole in the stack of sheets, and repeating the activating step in response to the determining step until the hole punching is successful. The method also includes determining whether a reference number of unpunched sheets, which is not greater than a single punch capacity of the hole puncher, has been stacked. Upon determining that the reference number of sheets has been reached, the method includes discontinuing the stacking of further sheets and applying a punching operation to the reference number of sheets. The method also includes reinitiating the stacking operation if the number of sheets to be stacked is greater than the reference number of sheets. The invention also includes an apparatus for carrying out the noted method steps. Thus, a large quantity of sheets can be punched under the invention without having to enhance the structure of the hole puncher.

REFERENCES:
patent: 4421264 (1983-12-01), Arter et al.
patent: 5229812 (1993-07-01), Toyama et al.
patent: 5230457 (1993-07-01), Hiroi et al.
patent: 5241355 (1993-08-01), Yamashita et al.
patent: 5290020 (1994-03-01), Matsui et al.

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