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:
Nov. 05, 1996
Filed:
Mar. 23, 1995
Applicant:
Inventors:
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
347-7 ; 347 19 ; 347 44 ;
Abstract
An ink jet printer having an ink tank and nozzle passages for jetting ink therefrom. A through hole communicates with the ink tank and has a diameter which is sufficiently greater than the diameter of the nozzle passages so that air is introduced in the through hole when the pressure in the ink tank becomes negative due to a lack of ink therein and when the nozzle passages are still filled with ink. The air introduced into the through hole is detected so as to indicate a lack of ink in the ink tank.