Patent ID: 6011574
Filing Date: 2000-01-04
Classification: B41J,B65B

Abstract:
A line thermal head printer apparatus in which printing is performed on a moving object to be printed by use of a thermal head and a ribbon tape, comprising:a velocity detector to detect a velocity of the moving object to be printed, said velocity detector configured to output a pulse signal for every predetermined length of object passed by said velocity detector;a stepping motor drive unit responsive to said pulse signal from said velocity detector and configured to control a stepper motor to move the ribbon tape, said stepping motor drive unit receiving the signal from said velocity detector via an electronic gear; anda processor electrically connected to said electronic gear and said velocity detector, for sending a gate signal to the electronic gear in responding to said pulse signal when printing is to be performed;wherein said stepping motor drive unit is configured to control to the stepper motor so as to move the ribbon tape a predetermined length per pulse signal received from said velocity detector which is equal to the predetermined length per pulse signal generated by said velocity detector, thereby the stepping motor moves the ribbon tape at a velocity synchronized with the velocity of the moving object to be printed.