Title: Suction air control device for use with sheet feeds

Abstract: A suction air control device used in conjunction with feed tables for feeding individual sheets in paper processing machines is arranged between a source of vacuum and a sheet feed suction bar. The device incorporates the use of a three-way valve which may be controlled by electric switching pulses, for example, in response to movement of the main operating lever or response to a monitoring device for monitoring double and incorrectly fed sheets in the event two sheets are disposed on top of each other or a sheet is disposed at an angle.

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Other info:

Inventors: Wirz, Arno (Bammental, DT)

Application Number: 695439
Filing Date: 1976-06-14
Publication_date: 1978-05-23
Assignee: Heidelberger Druckmaschinen AG (Heidelberg, DT)
Primary Class(es): 271/108 271/96
Other Classes:
US Patent Ref:

1747809	Feb, 1930	Aldrich	271/96.
2670203	Feb, 1954	Banthin	271/108.
2844368	Jul, 1958	Dexter et al.	271/108.

Other Refs:
Primary Examiner: Stoner, Jr., Bruce H.
Assistant Examiner:
Attorney: Lerner; Herbert L.