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:
May. 22, 1990
Filed:
Apr. 03, 1989
Applicant:
Inventor:
Robert L Walton, Rushden, GB;
Assignee:
Willett International Limited, Bucks, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
346-11 ; 3461 / ; 346 75 ;
Abstract
The present invention relates to a method for operating an electromagnetic valve means comprising a valve plunger journalled within a valve body for movement under the influence of an electric current on a drive stroke from a valve closed position to a valve open position, which valve means controls the flow of fluid to a nozzle orifice in a non-contact fluid droplet applicator apparatus, notably an ink jet printer, which method comprises intermittently applying a transient drive current to the valve means which is insufficient to move the plunger sufficiently on its drive stroke towards the valve open position to permit the flow of fluid through the valve.