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. 13, 2004
Filed:
Sep. 03, 2002
Sumito Anzai, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A unit heat value Q (=I ·t ) per pass is calculated from a current value (an effective current value) I of a carriage motor with one pass of a carriage (one-way running in a reciprocation) and a moving time (a motor driving time) t of the carriage. Then, the unit heat value Q is successively calculated to obtain a heat value Q for a unit time T (=one minute). The heat value Q is converted into a heat generation temperature &Dgr;T . The heat generation temperature &Dgr;T is successively added in consideration of a spontaneous radiation with the passage of time to obtain a current heat generation temperature &Dgr;T (&Dgr;T =K·&Dgr;T +&Dgr;T ; K is a radiation factor). When &Dgr;T exceeds a threshold, a pause time for one pass of the carriage is provided.