| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the image expansion/contraction, color slip and image shock mark caused by a resist roller which is a second carrying means with a simple structure. SOLUTION: A slip force Ft at a suction hold point 11n is made to Ft>Fp(max) for the maximum restration force Fp(max) of a firm copy material and the carrying force Fr of a resist roller is set to FP2 +Fk>Fr>FP1 +Fk for the restration force FP1 of a high-stiffness copy material P1 , the restration force FP2 of firm copy material P2 with, for example 127g/m<2> or more and the draw out force Fk of a supply roller 9 and on the high-stiffness copy material, a loop is formed positively between the resist roller and the suction roller on the firm copy material, the loop is not formed between the resist roller and the suction roller on the high-stiffness copy material, and the copy material P is driven according to the copy material carrying speed of a copy belt.</p> |
