The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 2011
Filed:
Feb. 11, 2003
David Andrew Horsnell, Cambridge, GB;
Matthew Brian Tomlin, Cambridge, GB;
Ammar Lecheheb, Cambridge, GB;
Oliver John Prime, Cambridge, GB;
Michael John Fox, Rutland, GB;
Christopher Michael Bates, Kettering, GB;
David Andrew Horsnell, Cambridge, GB;
Matthew Brian Tomlin, Cambridge, GB;
Ammar Lecheheb, Cambridge, GB;
Oliver John Prime, Cambridge, GB;
Michael John Fox, Rutland, GB;
Christopher Michael Bates, Kettering, GB;
Videojet Technologies Inc., Wood Dale, IL (US);
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 () 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 () to the nozzle orifice () has a length to diameter ratio of less than 8:1 preferably between 2:1 to 4:1 and the nozzle orifice () 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.