Block copy material for lithographic printing plate material, lithographic press and lithographic printing method
US6176182A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1998 |
| Grant date | Jan 23, 2001 |
| Priority date | — |
| Expiry date | Aug 10, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41N6/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A block copy material for a lithographic printing plate material comprising a sheet-like substrate, on at least one side of which a plurality of minute projections are distributively formed, or a lithographic press having a plate cylinder, on a surface of which a plurality of minute projections are distributively formed, wherein the density of minute projections having a height of more than 40 .mu.m is 20 projections/cm.sup.2 or less on surface average, and the density of minute projections having a height of 3 .mu.m or more is 25 projections/cm.sup.2 or more on surface average. The block copy material for a lithographic printing plate material, the lithographic press and a lithographic printing method using the block copy material or the lithographic press can avoid the deterioration of the printing dimension and printing accuracy caused by strain partially developed in printing, and can solve the problem of conventional methods, the deterioration of the workability in printing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.