Patent ID: 7380899
Filing Date: 2008-06-03
Classification: B41J

Abstract:
1. An ink jet printer, comprising: a recording head having a plurality of nozzles; a defective nozzle detecting device to check each of the nozzles of the recording head so as to detect defective nozzles from which ink droplets are not ejected; a determination device for determining an evaluation value of a defective nozzle occurrence situation based on a detection result of the defective nozzles; an operation control device for controlling operation of the printer head based on a determination result in the determination device; a reception device for receiving an input from a user that allows or disallows continuation of a printing operation; wherein the evaluation value is set through the reception device, when the input that allows the continuation of the printing operation is received through the reception device, the operation control device memorizes the evaluation value at time of the receipt of the input and printing operation is continued, then if the evaluation value of subsequent print is superior to the memorized evaluation value, the printing operation is continued without waiting for the input from the user that allows or disallows the continuation of a printing operation, and if the evaluation value of subsequent print is inferior to the memorized evaluation value, the printing operation is discontinued until the input that allows or disallows the continuation of the printing operation is received, and then if the input that allows the continuation of the printing operation is received through the reception device, the operation control device replaces the memorized evaluation value with a new evaluation value at the time of the input is received.