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. 26, 2000
Filed:
Sep. 11, 1998
Applicant:
Inventor:
David Charles Burke, Portsmouth, NH (US);
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41F / ;
U.S. Cl.
CPC ...
101228 ; 101219 ; 226 21 ;
Abstract
The present invention is directed to providing apparatus and methods for lateral position control using a web guide which detects a relative lateral shift of a web upstream of a control device. Error correction is thereby implemented using a phase advance rather than a phase lag. The lateral displacement control can be implemented continuously, or can be activated at certain times (e.g., when a new roll is spliced to an old roll, or when disturbances enter the system). The invention eliminates wasted time and wasted paper, by eliminating misalignment of a web with respect to a printing unit.