Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2011-01-11
2011-01-11
Meier, Stephen D (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S047000, C239S585100
Reexamination Certificate
active
07866796
ABSTRACT:
A solenoid valve making use of certain materials which is capable of operation at high frequencies and which can be made as a compact unit. The plunger (1) is made from a material having a saturation flux density greater than 1.4 Tesla preferably more than 1.6 Tesla, a coercivity at less than 0.25 ampere per centimeter and a relative magnetic permeability in excess of 10.000; and the nozzle bore leading from the valve head chamber (14) to the nozzle orifice (12) has a length to diameter ratio of less than 8:1 preferably between 2:1 to 4:1 and the nozzle orifice (12) has a diameter substantially the same as that of the nozzle bore. The invention also relates to method for operating a drop on demand ink jet printer incorporating such a valve.
REFERENCES:
patent: 4415910 (1983-11-01), Reece
patent: 6132035 (2000-10-01), Kutami et al.
patent: 6332667 (2001-12-01), Motegi et al.
patent: 7331654 (2008-02-01), Horsnell et al.
patent: 7571986 (2009-08-01), Horsnell et al.
Bates Christopher Michael
Fox Michael John
Horsnell David Andrew
Lecheheb Ammar
Prime Oliver John
Meier Stephen D
Mruk Geoffrey
Videojet Technologies Inc.
Yosick Joseph A.
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