Halftone printing plates containing microscopic perforations and methods for producing same
US6532082B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 1999 |
| Grant date | Mar 11, 2003 |
| Priority date | — |
| Expiry date | Jul 8, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41C1/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A computer implemented method to include microscopic perforations (perforations) in an printing plate is revealed. The particles improve the properties of the plate towards printability of an image on different kinds of offset presses. The perforations are formed by perforations which are added in a fully digital way. Aspects of the invention include of three alternative embodiments for include the repelling particles, and these alternative embodiments may be uses alone or in combination depending on the user's preferred workflow. The third alternative embodiment adds the perforations through an additional layer in the page description, this layer comprising a pattern which erases small particles in the original design elements. The first alternative embodiment adds the perforations through a modified screening method. The second alternative embodiment includes perforations into existing bitmaps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.