Recorders – Markers and/or driving means therefor – With ink supply to marker
Patent
1987-12-09
1989-10-17
Goldberg, E. A.
Recorders
Markers and/or driving means therefor
With ink supply to marker
346 75, 136883, 251 85, G01D 1516
Patent
active
048750581
ABSTRACT:
A valve device for matrix printers of the ink jet type.
The device is arranged for providing a liquid tight closure and opening of a passage for generating a portion of a character by the output of a certain amount of liquid for character recording through said passage.
Armatures, each one having an end portion are arranged as valve bodies in the passages, and means are arranged for operating the armatures in a reciprocating movement for obtaining said closure and opening functions.
A plate shaped element is the element wherein the passages are formed and comprises a grindable element, which is such that it is grindable to a smooth condition with long term smoothness and generally free from internal strains.
The end portion or valve head of each armature has at least partially a smooth surface arranged for being directly brought into abutment against the smooth grinded element, around the opening of the passage facing the armature.
The combined smoothness between the armature end portion and the smooth grinded valve surface around the passage is such that at least a molecular layer of the character recording liquid permanently exists between each end portion and valve seat.
In a further embodiment the valve head is connected to the armature by a flexible portion, which allows angle positioning of the valve head relative the longitudinal axis of the armature. This means that under the influence of the spring member, the head may be brought into a parallel abutment against a plate of non-resilient material having ink outlet openings therein.
REFERENCES:
patent: 3605793 (1971-09-01), Kinsel
patent: 3837617 (1974-09-01), Eminger et al.
patent: 4378564 (1983-03-01), Cross et al.
patent: 4539570 (1985-09-01), Moore
patent: 4576111 (1986-03-01), Slomianny
patent: 4736776 (1988-04-01), Vonasek
PCT Publication "Ink Jet Printing System" to Barney U.S. Classification.
Goldberg E. A.
Markpoint System AB
Tran Huan
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