Image forming apparatus

Abstract

In order to provide an image forming apparatus which can reduce color deviation at the time of forming an image on a medium, the present printing apparatus comprises an image forming unit which forms an image by superimposing images, each formed with corresponding color of ink, on a transfer film (46) while heating a thermal head (40), a film conveying device which conveys a transfer film (46), a sensor (Se1) which detects a stretch of the transfer film (46) occurring due to heating with the thermal head (40), a controller which controls the image forming unit to change a line cycle of the thermal head (40) in accordance with a stretch of the transfer film (46) detected by the sensor (Se1).

Description

technical field [0001] The present invention relates to an image forming apparatus, and more particularly, to an image forming apparatus that forms an image on a medium using an ink ribbon having inks of a plurality of colors. Background technique [0002] Conventionally, image forming apparatuses for forming images on transfer media such as transfer films and image carriers and printing media such as cards, sheets, and tubes are widely known. In such an image forming apparatus, for example, an indirect printing method that uses an ink ribbon to form an image (mirror image) on a transfer medium, and then transfers the image formed on the transfer medium to a printing medium, or uses an ink ribbon A direct printing method that directly forms an image on a printing medium. [0003] In such an image forming apparatus, color printing is generally performed to generate a color image by superimposing images formed with inks of a plurality of colors. That is, according to the inp...

AI Technical Summary

Problems solved by technology

In the case of the indirect printing method, if the transfer medium on which the color shift occurs is transferred to the printing medium, the printing quality of the image transferred to the transfer medium will deteriorate.

Images