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. 15, 1984
Filed:
Dec. 13, 1982
Michio Umezawa, Kawasaki, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An ink ejection head having a body and a nozzle member which is mounted on the head body through a nozzle holder. To facilitate the ease of machining, the nozzle member is formed with a generally cup-shaped recess first and then a nozzle hole for ejecting ink. The space defined between the wall of the cup-shaped recess and the nozzle holder is filled with a projection extending from the nozzle holder or a flexible member. A passageway extends throughout the projection or the flexible member to provide fluid communication between the nozzle hole and an ink chamber defined in the head body. The projection or the flexible member minimized a diametrical step conventionally defined between the nozzle hole and the cup-shaped recess, so that bubbles drawn into the nozzle hole upon termination of an ink ejection can be released to the outside within a short period of time.