Envelope feeder for printing press with timing circuit for sucti

Details Envelope feeder for printing press with timing circuit for sucti Envelope feeder for printing press with timing circuit for sucti

1984-01-11

1985-06-25

Eickholt, E. H.

Printing

Rolling contact machines

Rotary

271107, 271 93, 271 11, B41F 1324

Patent

active

045246912

ABSTRACT:
An envelope feeder for a printing press providing a unique feeder arrangement that allows multiple parallel feeding of stacks of differently sized and shaped envelopes to be fed into the press simultaneously. An envelope vacuum pick-up arrangement is coordinated with a feed roller that grabs the envelopes from the bottom end of open-ended, independently adjustable feeder trays, that can be fed with unprinted envelopes continuously without interrupting the printing process. Electronic logic sensing and control apparatus monitors the envelope feeding process such that, in case of misfeeds, the next following printing cycle is inhibited to avoid smearing of wet ink. Timing apparatus with manual control insures precise registration of the printed image even at high speed operation. Manual switches coordinated with the electronic control allows feeding from a single or from all feeder trays.

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