The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 1992
Filed:
Jan. 09, 1991
Applicant:
Inventors:
Joseph S Kharzo, Chicago, IL (US);
David W Grostick, Barrington, IL (US);
Jiann-Shing Liang, Mount Prospect, IL (US);
Narasimha Swamy, Streamwood, IL (US);
Assignee:
AM International, Inc., Chicago, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65H / ;
U.S. Cl.
CPC ...
271108 ; 271107 ;
Abstract
A printing or duplicating machine has a suction control system which includes a source of vacuum and a conduit connecting the source of vacuum to a suction feeder. An operator panel is used to set a pattern of relative weight of each sheet in a stack. A controlled bleed valve is operatively associated with any of the suction feeder, source of vacuum or conduit for automatically adjusting vacuum at the suction feeder responsive to relative weight of any given sheet as selected by an operator.