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. 21, 1995
Filed:
Jun. 28, 1993
Heiner Luxem, Wilhelmsfeld, DE;
Heidelberger Druckmaschinen AG, Heidelberg, DE;
Abstract
A measurement device for detecting the presence of a sheet is disclosed. A paper sheet processing machine has front lays with stop surfaces at which the leading edges of paper sheets are aligned. The paper sheets are accelerated by pre-grippers to a speed sufficient for transferring the paper sheets to a paper sheet processing unit, such as a transfer drum in a sheet-fed rotary offset printing machine. The measurement device comprises upper and lower sensor members between which a gap is defined. The leading edges of sheets which are aligned at the front lays are disposed within the gap. The upper and lower sensor members forming upper and lower boundaries, respectively, of a scanning region which is defined vertically relative to the plane of the paper sheet. Paper sheets which cross the scanning region between the sensor members and which are aligned along the stop surfaces of the front lays are detected. A method and a corresponding pre-gripper assembly are disclosed as well.