Printing presses
US4760790A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1986 |
| Grant date | Aug 2, 1988 |
| Priority date | — |
| Expiry date | Mar 5, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F23/0443
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
There is provided a web printing apparatus (20 ) comprising a web feed means (4, 5, 6), two or more printing stations (21, 22) arranged to print radiation-curable ink onto a web (3) and a primary radiation source (11) arranged to radiate said web with an ink-curing radiation after said web has passed a first said printing station (21) and before said web passes the subsequent printing station (22), wherein said apparatus further comprises a plurality of secondary radiation sources (13, 14) each extending part way across the width of said web and each being arranged to radiate a part of said width after said web has passed said first printing station and before it has passed said subsequent printing station. By controlling the positioning of the secondary radiation sources, generally UV sources, and the radiation emission levels of the primary (11) and secondary (13, 14) radiation sources, wastage may be reduced and efficient ink curing can be achieved with lower power consumption and with lower press operating tempertures than is possible with the use of only the primary radiation sources.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.