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:
Jun. 27, 2000
Filed:
Jul. 29, 1997
Shuichi Yamaguchi, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An ink jet recording apparatus including an ink jet recording head 1 that is shuttled by a carriage 4 and jets ink droplets in synchronism with a print signal, a capping device 8 to which a negative pressure of a sucking pump 10 is supplied, a first ink tank 12 that communicates with the atmosphere through an opening 14 and contains a printing ink, a second ink tank 13 that contains ink in a degassed condition, a selector valve 16 that selectively connects the first and second ink tanks to the recording head, and a controller 20 that controls the selector valve 16. Ink in the first ink tank 12 or the second ink tank 13 is discharged out of the recording head 1 by causing the capping device 8 to apply negative pressure to the recording head 1 during a cleaning operation of the recording head 1.