Rotogravure cylinder proofing method
US4759285A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1987 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Jul 14, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M1/42
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.