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:
Jul. 12, 1983
Filed:
Jun. 05, 1981
Applicant:
Inventor:
Edmond L Kyser, Portola Valley, CA (US);
Assignee:
System Industries Inc., Milpitas, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
346-11 ; 3461 / ;
Abstract
A method of ejecting individual ink droplets on demand from an enclosed ink chamber through a nozzle wherein the pressure of ink within the chamber is controlled to maximize the positive droplet ejecting pressure while controlling the negative pressure cycle to prevent cavitation, and also to return the ink pressure to its steady state static value quickly in preparation for another droplet ejection. The ink pressure is controlled by controlling the volume of the ink chamber and the rate at which it is changed.