| 摘要 |
PROBLEM TO BE SOLVED: To feed a web by a fixed amount and to perform cleaning with simple constitution even when the outside diameter of a take-up roller including the web is increased by changing the specified number of processing times of a body to be cleaned which rotates a take-up roller by a control means based on the number of cumulation processing times of a cumulation means. SOLUTION: Based on the cumulative number of copies (the number of cumulation processing times) outputted as a signal from a copy number cumulation part 31, a CPU 30 controls to change the specified number of copies as web operation timing corresponding to driving a motor 20 for rotating the web take-up roller 3 once. In the initial stage of use, there is little web already taken up and the amount of the web taken up by driving the motor 20 once is small. As the web is taken up, the amount of the web taken up per driving the motor 20 once is gradually increased. The specified number of copies as the operation timing of the motor 20 is gradually increased and the feeding amount of the web per one copy is uniformized. |
