Secondary roller for fountain solution contact angle pinning
US11787167B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2022 |
| Grant date | Oct 17, 2023 |
| Priority date | — |
| Expiry date | Feb 5, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41P2227/70
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Ink-based digital printing systems useful for ink printing include a secondary roller having a rotatable reimageable surface layer configured to receive fountain solution. The fountain solution layer is patterned on the secondary roller and then partially transferred to an imaging blanket, where the fountain solution image is inked. The resulting ink image may be transferred to a print substrate. To achieve a very high-resolution (e.g., 1200-dpi, over 900-dpi) print with these secondary roller configurations, an equivalent very high-resolution fountain solution image needs to be transferred from the secondary roller onto the imaging blanket. To increase the resolution of the image on the secondary roller, examples include a textured surface layer added to the secondary roller for contact angle pinning the fountain solution on the roll. Approaches to introduce a micro-structure onto the surface layer of the secondary roller, and also superoleophobic surface coatings are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.