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:
Mar. 18, 2003
Filed:
Jan. 03, 2002
Applicant:
Inventors:
I-Chung Hou, Hsin-Chu, TW;
Cheng-Wei Hsu, Yung-Kang, TW;
Assignee:
International United Technology Co., Ltd., Chu-Pei, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/175 ;
U.S. Cl.
CPC ...
B41J 2/175 ;
Abstract
An ink reservoir has an air bag, a housing with an ink reservoir, an elastic constraining device for constraining the air bag to prevent the seepage of ink by way of back-pressure, an active shaft movably installed in the ink reservoir, and a plugging device engaged with the active shaft for plugging a second vent of the housing. When consumption of ink in the ink reservoir causes the air bag to expand to a predetermined degree, the air bag moves the active shaft, the active shaft pulls the plugging device out of the second vent, and air enters into the ink reservoir to reduce the volume of the air bag.