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:
Mar. 20, 1984
Filed:
Sep. 14, 1982
Harry M Greiner, Offenbach am Main, DE;
Abstract
An automatic control method and apparatus for adjusting the register of printing plates in a multi-color printing press before test sheets or proofs are printed. Register marks are copied on the printing plates when the plates are manufactured. Photoelectric scanners sense the register marks and determine the relative positions of the printing plates without the use of paper. The positions of the printing plates are compared and the plate cylinders are adjusted so that the printing plates of all the plate cylinders are in register with one another. Preferably the relative positions are referenced to registered zero positions in the middle of the adjustment range for each plate cylinder, and the position of the printing plate having the least deviation from the corresponding zero position is chosen as a reference position to which the positions of the other printing plates are compared.