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:
Dec. 16, 1997
Filed:
May. 08, 1995
Burkhard Maass, Heidelberg, DE;
Heidelberger Druckmaschinen AG, Heidelberg, DE;
Abstract
Device for adapting negative pressure in a suction belt feed or supply table of a sheet feeder to operating conditions which vary during sheet conveyance, having at least one endless, revolvingly driven conveyor belt provided with suction openings, and a side alignment device for laterally aligning a respectively foremost sheet of a shingled or overlapping sheet stream, and at least one suction box disposed below a conveying plane, the suction box, in a sheet feeding direction, being subdivided into a plurality of chambers subjectible to negative pressure independently of one another, includes a conveyor belt, a plurality of suction chambers disposed in the conveying plane below the conveyor belt, a common suction union and a swivelable shutoff element for selectively connecting the suction chambers to the suction union.