Method of producing a perforated metal foil
US4182660A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1978 |
| Grant date | Jan 8, 1980 |
| Priority date | — |
| Expiry date | Apr 17, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41C1/142
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
To produce a perforated metal foil, especially for use in a screen printer, a decomposable, dissoluble or vaporizable dielectric substance is deposited on a cylindrical conductive substrate in a dot pattern under the control of a photoelectrically scanned master. The spaces between the dots are then filled with an electrolytically deposited metal forming a coherent layer which is subsequently stripped off the substrate. The deposition of the dot pattern is carried out through a spray nozzle, sweeping the rotating substrate, which has an outlet in a bottom wall of a narrow space filled with the liquid dielectric to be dispensed, that space being separated by an apertured partition from an overlying plenum chamber in which the air is intermittently pressurized by an electromagnetic armature to expel a limited quantity of dielectric through the outlet; the membrane may be vibrated at supersonic frequencies to generate the necessary discharge pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.