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:
Jul. 26, 1988
Filed:
Jul. 14, 1987
Russel N Fox, Danville, IL (US);
Keith K Klett, Danville, IL (US);
Hurletron, Inc., Danville, IL (US);
Abstract
A method for conducting a proofing operation of a rotogravure printing cylinder includes preparation of a steel drum having in sequence from the outer steel surface a layer of plastic such as Mylar.RTM., a blanket consisting of a rubber composite material, a paper/foil layer with the foil side facing outwardly, and a proofing sheet consisting of normal printing paper. The rotogravure cylinder which is to be proofed is brought into contact with the thus-prepared drum, and a high voltage is applied to the foil via the proofing sheet. The rotogravure cylinder is inked and rotated through one printing revolution so that a complete impression is made on the proofing sheet. The high voltage assists in the transfer of ink from the cups of the rotogravure cylinder to the proofing sheet. The impression produced by the rotogravure cylinder can then be checked before the rotogravure cylinder is sent to a user.