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. 09, 2010
Filed:
Nov. 20, 2006
Seiji Izuo, Shirojiri, JP;
Seiji Izuo, Shirojiri, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
When an actually measured voltage Vsu detected by a voltmeteris within an inspection permissible range, a print head inspection apparatusperforms an inspection as whether or not ink has been normally ejected, on the basis of a changes in voltage that occur in an inspection areaas a result of ejected ink droplets. On the one hand, when the actually measured voltage Vsu is less than the inspection range, the apparatus increases a relative distance between a nozzle plateand the inspection areaby separating the capping memberfrom the print head, by then bringing the capping memberand the print headinto contact, and after a suction pumpperforms a separated-suction process, by then gradually separating the capping memberfrom the print headuntil the actually measured voltage Vsu is within the inspection permissible range. Thus, a nozzle inspection as to whether or not the print recording liquid has been normally ejected can be carried out with a stable degree of accuracy.