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:
Oct. 06, 1981
Filed:
May. 06, 1980
Applicant:
Inventor:
Takuro Isayama, Tokyo, JP;
Assignee:
Ricoh Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
3461 / ;
Abstract
A device for removing air bubbles formed and trapped in an ink chamber of an ink-jet print head, said device comprising a means for sensing the existance of air bubbles in the ink chamber, a means responsive to the output signal from the sensing means for replacing the ink in the ink chamber with an agent having a low surface tension, and a means for replacing the agent filled in the ink chamber with the ink.