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:
Nov. 07, 1995
Filed:
Mar. 27, 1989
Heidelberger Druckmaschinen AG, Heidelberg, DE;
Abstract
A feeder for a sheet-fed printing machine having a feeder table having at least one pulling unit coupled to the machine drive train for imparting to each newly arrived sheet a defined direction of pull, and a sensing arrangement for sensing the position of the side edges of the sheet, the feeder which includes at least one sensor having a response range, facing a respective side edge of the sheet, the sensor which produces two distinctly different signals that indicate the presence or absence, respectively, of the sheet in the desired position of the sheet before and after imparting the pull; electronic logic control apparatus operatively responsive to the signals from the sensor that are produced at the first and second interrogation of the sensor before and after the pull for determining if the sheet after the pull is positioned within the response range of the sensor; and alarm indicator operatively responsive to the logic control apparatus for producing an alarm indication in case it is determined by the logic control apparatus, that the respective sheet edge is not present within the response range of the sensor after the second interrogation.