Cleaning attachment for cylindrical printing screen
US3986450A · kind A · utility
Inventor
Key dates
| Filing date | Dec 27, 1974 |
| Grant date | Oct 19, 1976 |
| Priority date | — |
| Expiry date | Dec 27, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F35/004
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A cylindrical printing screen, rotatable about a horizontal axis, rolls on a continuously moving substrate to be imprinted and is internally provided with an applicator forming a gap through which a printing dye can pass to the substrate along the nadir of the screen. A codirectionally rotating scraper roll continuously sweeps the descending part of the outer screen surface and is in turn contacted by a squeeze roller or a doctor blade for the removal of excess dye. A similar cleaning device, e.g. in the form of an elongate suction nozzle, may be disposed along the rising part of the inner screen surface. The scraper roll can be continuously irrigated with rinse water and may be mounted, together with one or more spray heads, on a swingable frame for disengagement from the printing screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.