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. 28, 2009
Filed:
Sep. 06, 2006
Seiji Izuo, Nagano-ken, JP;
Seiji Izuo, Nagano-ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An ink jet printerof the present invention can carry out a head check on whether or not ink is normally ejected from nozzles, by having a voltage detection circuitdetect electrical change resulting from ejecting of charged ink droplets onto an ink receiving area. When instructed to do borderfree printing, the ink jet printerhas a voltage application circuitto charge ink in the print head, and ejects ink onto an area within the ink receiving areawhere a recording sheet S is present and an area where a recording sheet is not present. The ink jet printeralso carries a print headand determines a front edge of the recording sheet S based on a position where a voltage detection circuit no longer detects voltage. Thus, the ink jet printerdetermines a front edge, side edges, and rear edge of the recording sheet S by directly using ink. Determination of a position of the edge of the print medium is thus secured with greater accuracy than with any method in which anything other than print recording liquid is used and in which the position is indirectly determined.