| 摘要 |
PROBLEM TO BE SOLVED: To suppress a change in density of an image in a sub scanning direction.SOLUTION: A transfer device comprises: a power source for transfer 151 that outputs a transfer bias to a transfer part 15; and a transfer bias setting part 111 that sets a bias for a non-transfer period y to a non-image area from a bias for a transfer period x set to an image area by using a primary function y=ax+b(including b=0) according to at least one condition of an environmental condition, sheet type condition, and printing condition.SELECTED DRAWING: Figure 2 |
