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:
Apr. 11, 1995
Filed:
Aug. 30, 1993
Applicant:
Inventor:
Burkhard Maass, Heidelberg, DE;
Assignee:
Heidelberger Druckmaschinen AG, Heidelberg, DE;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65H / ; B65H / ;
U.S. Cl.
CPC ...
271147 ; 271159 ;
Abstract
Safety device in a sheet feeder of a sheet-fed processing machine includes a freely revolving pile-lifting chain for lifting and lowering a feed pile, a first drive for entraining pile-lifting chain with a driving connection so as to lift the feed pile, a second drive for entraining the pile-lifting chain with a driving connection so as to lower the feed pile, and a device for disconnecting at least one of the driving connections of the first and the second drives with the pile-lifting chain for lowering the feed pile when a limit value for a force exerted by the feed pile upon the pile-lifting chain is exceeded; and a safety method.