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:
Aug. 13, 1991
Filed:
Jan. 22, 1991
Applicant:
Inventors:
Elaine A Pullen, Elk Grove Village, IL (US);
Robert I Keur, Elk Grove Village, IL (US);
Gerry B Andeen, Menlo Park, CA (US);
Assignee:
Videojet Systems International, Inc., Chicago, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J / ; G01D / ;
U.S. Cl.
CPC ...
346 75 ; 3461 / ;
Abstract
An ink jet chamber communicates with an ink reservoir through an opening in a diaphragm plate. The chamber also includes a nozzle through which ink may be ejected on demand. A mass, such as a ball, is reciprocally driven into the diaphragm plate. The ball, upon striking the diaphragm, closes the chamber opening, pressurizing the ink in the chamber to eject a droplet from the nozzle. The ball is driven by a printer driver wire to which it may be attached. Large arrays may be constructed.