Dyestuff applicator for screen printer
US3942439A · kind A · utility
Inventor
Key dates
| Filing date | Jan 3, 1974 |
| Grant date | Mar 9, 1976 |
| Priority date | — |
| Expiry date | Jan 3, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F15/44
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A downwardly open applicator housing, surrounding and mounted on a dyestuff-supplying tube within a cylindrical printing screen, carries an elastic diaphragm which spans its lower end in a slack state so as to hang down with a convex underside under the weight of a load of dyestuff in the housing and a pair of bars bearing upon the diaphragm from above. The central region of the diaphragm, flanked by the weighting bars, has a series of axially spaced openings for the discharge of the dyestuff; a flexible but substantially inextensible reinforcing strip of low-friction material, having a longitudinal slot registering with these openings, is bonded to the underside of the diaphragm to facilitate relative sliding of the screen and seal the gap region against leakage of dyestuff onto the inner screen surface. The upper diaphragm surface may have gap-bridging elements such as threads or wires bonded thereto as additional reinforcements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.