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. 16, 2003
Filed:
Aug. 27, 2001
Applicant:
Inventors:
Tobias Müller, Hirschberg, DE;
Thomas Wolf, Karlsruhe, DE;
Assignee:
Heidelberger Druckmaschinen AG, Heidelberg, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65H 1/18 ;
U.S. Cl.
CPC ...
B65H 1/18 ;
Abstract
An apparatus for feeding sheets from a stack to a machine that processes the sheets and a method of determining the vertical position of stacked sheets. The method enables the vertical position of the topmost sheet resting on the sheet stack to be determined using a sensor device. Ultrasonic pulses are applied to a longitudinal side of the sheet stack such that the pulses strike the longitudinal side of the stack at an angle, and the position of the upper edge of the stack is determined by means of an ultrasonic propagation time measurement.