| 摘要 |
PURPOSE:To permit slow movement of a swing fin by permitting the swing fin to follow by a small angle as far as possible in correspondence to the length of treatment of a blank-form in a stacker, in the apparatus for folding the printed- form, with the front surface after the back surface by turns. CONSTITUTION:The oscillator 4 which has the higher frequency than the output pulse frequency of an encoder 8 with the max. speed in a swing fin is provided to generate oscillation only in the case when the information from a line printer is still in a reversible counter 1. This frequency is divided by the ratio N/P in inverse proportion to the length of the blank-form (P is the number in proportion to the length of a page), and a motor 7 is rotated by the angle corresponding to the output. The pulse N is determined, in consideration of P, to the number for the line pulse number corresponding to the pulse number applied to the motor 7 for one page to permit 1/2 reciprocative oscillation of the swing fin. The motor energizing pulse or the encoder output pulse is multiplexed by P/M to form reduction output, and if M is determined to form the line pulse number in 1/2 reciprocative movement of the swing fin for one page, following of the swing fin in the speed corresponding to the length of one page is permitted. |
