Buckle control system

In a sheet feeding apparatus for forming a buckle in a sheet including:

• a stop member;
• means for feeding a sheet against the stop member to form a buckle in the sheet;
• sensing means for sensing the position of an edge of the sheet;
• timing means responsive to the sensing means for timing a reference time interval from the sensing of the edge, said timing means being coupled to said feeding means and including means for stopping said feeding means upon the expiration of said reference time interval, said reference time interval being sufficiently long to allow said feeding means to form said buckle in said sheet;
• the improvement wherein, said timing means includes:
• digital clock means for counting said reference time interval, said digital clock means including binary counter means and logic means coupled to said sensor means for enabling said counter means upon the sensing of said edge of said sheet, said timing means further including logic means for decoding said counter at a desired count corresponding to said reference time interval, said means for stopping said feeding means being coupled to said decoding means, means for adjusting said timing means, said adjustment means comprising a plurality of outputs from said counter means which may be applied to corresponding inputs of said decoding means, and means for selectively applying one or more of said outputs from said counter means to corresponding inputs of said decoding means whereby the count which will be decoded can be adjusted.

In a reproducing apparatus including an imaging means, means for serially feeding sheets from a stack to said imaging means along a sheet feed path, a stop member positionable in said sheet feed path, means for forming a buckle in said sheet, including:

• sensing means for sensing the position of an edge of said sheet, timing means responsive to said sensing means for timing a reference time interval from the sensing of said edge, said timing means being coupled to said feeding means and including means for stopping said feeding means upon the expiration of said reference time interval, said reference time interval being sufficiently long to allow said feeding means to feed said sheet against said stop member to form said buckle in said sheet, the improvement wherein, said timing means includes:
• digital clock means for counting said reference time interval, said digital clock means including binary counter means and logic means coupled to said sensor means for enabling said counter means upon the sensing of said edge of said sheet, said timing means further including logic means for decoding said counter at a desired count corresponding to said reference time interval, said means for stopping said feeding means being coupled to said decoding means, means for adjusting said timing means, said adjustment means comprising a plurality of outputs from said counter means which may be applied to corresponding inputs of said decoding means and means for selectively applying one or more of said outputs from said counter means to corresponding inputs of said decoding means whereby the count which will be decoded can be adjusted.