Patent ID: 8773483
Filing Date: 2014-07-08
Classification: B41J,B41M,B42C

Abstract:
1. A duplex printing method for printing on both sides of a roll sheet by a thermal transfer method, comprising: printing firstly, in such a manner that a surface of 1st thermal transfer sheet in which a color material layer is provided touches 1 st surface of the roll sheet and 2 nd surface of the roll sheet touches 1 st platen roller, superimposing and pressing the 1 st thermal transfer sheet and the roll sheet between the 1 st platen roller and 1 st thermal head, making the 1 st thermal head to generate heat according to image data while conveying the 1 st thermal transfer sheet and the roll sheet, transferring a color material of a color material layer of the 1st thermal transfer sheet to the 1st surface of the roll sheet, and printing image on the 1st surface of the roll sheet, and printing secondly, in such a manner that a surface of 2 nd thermal transfer sheet in which a color material layer is provided touches 2 nd surface of the roll sheet and 1st surface of the roll sheet touches 2 nd platen roller, superimposing and pressing the 2 nd thermal transfer sheet and the roll sheet between the 2 nd platen roller and 2 nd thermal head, making the 2 nd thermal head to generate heat according to image data while conveying the 2 nd thermal transfer sheet and the roll sheet, transferring a color material of a color material layer of the 2 nd thermal transfer sheet to the 2 nd surface of the roll sheet, and printing image on the 2 nd surface of the roll sheet, wherein performing control of duplex printing according to a maximum printing number of images which can be printed on one side at one conveyance by a control part.