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. 17, 2006
Filed:
Jul. 08, 2004
Jin-sheng Lai, Hsi Chih, TW;
Jin-Sheng Lai, Hsi Chih, TW;
Greater Computer Corporation, Hsi Chih, TW;
Abstract
A negative-pressure control device for an ink-supply system comprises a box, an ink-jet head, an adapter and a set of releasable check valve mutually communicated. The box has thereon a water outlet, and is provided therein with a liquid level gauge to control and maintain a constant level of the ink in the box; by operation of a releasable check valve set, air in the ink-jet head and the adapter presents the state of negative-pressure, this maintains a balance state preventing the ink from dropping when the ink in the ink-jet head and the water outlet is subjected to attraction of the air with the negative-pressure; when the ink-jet head jet prints downwards, it can automatically supplement ink to get an effect of continuous jet printing; the control device is suitable for a jet-drawing machine to place an advertising board with a propaganda paint or a poster etc. for printing.