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. 02, 1999
Filed:
Feb. 07, 1997
Gustave Anthony Ruth, III, Old Saybrook, CT (US);
The Lee Company, Westbrook, CT (US);
Abstract
A method and apparatus for preventing nozzle clogging in systems for dispensing fluids that comprise a suspension or solution of solid particles in a volatile solvent, such as ink jet printing systems consisting of a control valve and a nozzle, the method comprising causing the solvent to withdraw from the nozzle by increasing diffusion of the solvent from the system at a point distal from the nozzle by means of inserting, between the nozzle and the control valve, a section of tubing that is semipermeable to the solvent, and the apparatus comprising the usual dispensing system with the addition of a semi-permeable tube between the control valve and the nozzle.