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:
Apr. 22, 2003
Filed:
Jun. 16, 2000
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
When a piston unit and a valve unit employed in a recording head of an ink-jet recording apparatus were manufactured by a conventional method, comprising parts for these unit were separately formed and assembled, which required considerable man-hours for the assembly and measures to prevent contamination by foreign particles during the assembly. The present invention is carried out to solve these problems and provides units at less expensive cost. In order to attain above-mentioned objectives the units are formed out of mutually insoluble materials with other parts by an insert molding or a multi-color molding. By employing forming materials with different molding shrinkage rate, desired gas-tightness of the units are attained by keeping moving performances of the units almost intact. In addition a rubber or an elastomer is employed as a material for a part which requires a gas-tightness and flexibility.