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:
Feb. 18, 1992
Filed:
Mar. 05, 1990
Arno Wirz, Bammental, DE;
Heidelberger Druckmaschinen AG, Heidelberg, DE;
Abstract
Device for scanning lengths of sheets in a sheet-processing machine, wherein the sheets travel with a leading and a trailing edge, including suction-air measuring nozzles alignable with the trailing edges of the sheets and connected to a suction-air source via control elements connected in an electrical circuit of the machine drive, a feeder for aligning the sheets to be processed at stops for the leading edges of the sheets, lift-type suckers for lifting the sheets individually off a pile of sheets, and have structure defining a scanning hole in at least one of the suction-air measuring nozzles, the one nozzle being disposed in the feeder and being directed towards the trailing edge of an uppermost sheet disposed on a pile of sheets, a suction-air connecting line connecting the one nozzle to the suction-air source, and a differential pressure-measuring valve connected in the line and cooperatively associated with the control elements.