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:
May. 25, 2004
Filed:
Dec. 24, 2002
Chien-Ming Lin, Taipei, TW;
Chuang-Hsien Chiu, Hsinchu, TW;
NanoDynamics Inc., Hsinchu Hsien, TW;
Abstract
This specification discloses a negative pressure-regulating airbag for an embedding-type ink cartridge and its assembly method. In addition to a bag with a variable volume, the negative pressure-regulating airbag has a buckle ring, a plate, and a elastic element. The buckle ring is closely connected to the bag. A vent hole is formed in the middle of the buckle ring, allowing air to enter or escape the airbag when the ambient pressure changes. The buckle ring has a protruding part on the surface of the bag so as to be embedded into a preserved hole on an ink cartridge by pressing during the assembly. This forms a quick and tight connection between the airbag and the ink cartridge. One end of the elastic element is connected to the ink cartridge and the other end to the plate so that the plate imposes a force to depress the airbag. This keeps a negative pressure inside the cartridge to prevent ink leakage from the cartridge during transportation or use.