| 摘要 |
A machine for repetitively performing processing steps at spaced points on a moving strip of paper includes apparatus for timing the repetition of the processing steps. The timing apparatus consists of two generally circular cam plates, adjustably mounted co-axially on an end of a processing roller. The cam plates are adjustably rotatable with respect to each other around the axis of rotation of the processing drum to adjustably vary the angular displacement of the cam lobe surfaces of each plate to the other. Cam follower means are provided which are responsive to the combined effective length of the superimposed cam lobe surfaces. The cam follower means actuates the processing apparatus which performs the repetitive steps on the paper passing onto and partially around the processing drum.
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