Liquid-jet printer device
US5446486A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 1992 |
| Grant date | Aug 29, 1995 |
| Priority date | — |
| Expiry date | Jun 5, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/17
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Liquid jet printer device for recording information on an information carrier in the form of characters or symbols. A print head forms a part of the device and a plurality of liquid channels are arranged therein to discharge a series of liquid jets or liquid droplets according to a predetermined pattern during predetermined printing periods. The liquid channels in the print head present outlet openings for the discharge of print liquid under pressure, and valves included therein, switchable for opening and closing respectively the liquid channels. Inlet ends connect the liquid channels to a supply conduit for delivery of print liquid via a pump under pressure from a liquid container. The device maintains an operating pressure in the supply conduit only during those printing periods during which printing takes place. Pressure relief occurs during idle periods between printing periods to atmospheric pressure or sub-atmospheric pressure. During the idle periods, a small return flow of print liquid occurs so that the outlet openings are substantially emptied of print liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.