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:
Jul. 06, 2004
Filed:
Jan. 31, 2003
NanoDynamics Inc., Hsinchu, TW;
Abstract
The specification discloses an ink container having a pressure stabilizer module. The module contains an airtight membrane, a passive plate, and an elastic device. The airtight membrane separates a box into an ink chamber and an air chamber. The passive plate is connected to one side of the airtight membrane and to the elastic device. The elastic device is normally depressed or stretched to move the airtight membrane. The ink chamber is thus slightly extended outward and maintains a negative pressure. As the ink stored inside the ink chamber gets less, the elastic device provides a restoring force to push or drag the passive plate. The negative pressure is thus maintained within a specific range. The invention further uses a conic spiral spring to avoid ink waste.