| 摘要 |
As an original sheet, such as a tracing, to be copied on a sensitized sheet in an automatic copying machine moves longitudinally in the flat on a horizontal surface, the front and rear edges of the origianl sheet actuate sensor switch which energize control circuits to cause a web to be drawn from a selected one of two supply rolls of copy paper in which lightly tensioned slack is provided to improve the start of the web feed, and a loop is initially formed in the web at the exit of a web cutting station to provide for subsequent cutting of the web which the part being cut is stationary and the part in front continues to feed for perfect length-matching of the original and copy sheets, in conjunction with a speed control having a man-adjustable dial that is mechanically connected to shiftable switch mounts for synchronizing the operation of the mechanism.
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