Apparatus for depositing liquid droplets on a moving receiving surface
US3988740A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1972 |
| Grant date | Oct 26, 1976 |
| Priority date | — |
| Expiry date | Sep 25, 1992 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D15/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for depositing liquid droplets in a printing operation employs a member having a receiving surface and being moved at a speed high enough to cause the generation of a gaseous boundary layer along the receiving surface. The stream of droplets is projected at right angles to the rapidly moving receiving surface and a stationary intercepting device is provided to remove, deflect or slow down the boundary layer upstream of the locus where the droplets impinge upon the receiving surface. If the receiving surface is provided on a cylindrical member, the intercepting means may comprise a stationary cylinder surrounding the receiving surface with a clearance of 0.5-2 millimeters. Regardless of the configuration of the receiving surface, the intercepting means may employ one or more stationary deflecting blades or one or more suction nozzles having orifices closely adjacent to the receiving surface immediately upstream of the locus of impingement of droplets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.