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. 22, 1998
Filed:
May. 22, 1996
Pierre Hoynant, Fontaine Chaalis, FR;
Alain Blanchard, Gouvieux, FR;
Heidelberger Druckmaschinen AG, Heidelberg, DE;
Heidelberg Harris SA, Montatiare Cedex, FR;
Abstract
A method for detecting disruptions in the transport of a web in a rotary printing press. A speed evaluation is performed on the web and then analyzed, including a comparison of a contactless measurement of the instantaneous speed (VPAP(t)) of the web with a speed selected from the group of speeds of the web consisting of: 1. a virtual speed (VVIRT(t) which is evaluated from the mechanical speed of the press, 2. an average speed (VAVE(t)) measured during a time before the last measurement, and 3. a speed (VPAP (t.sub.k-1)) measured at the moment immediately before the moment when an instantaneous speed (VPAP(t.sub.k)) is measured. The analysis is performed to obtain a respective speed difference, and to compare the respective speed difference with a respective prescribed threshold value. If the speed difference is not within the threshold value, a signal is generated which indicates that the web is not traveling at the proper speed.