| 摘要 |
Strip feed mechanism comprises an intermittently rotated sprocket wheel which engages the strip material. A guide plate extends tangentially past the sprocket wheel and serves to hold the strip material against the wheel and in engagement with the sprocket teeth. At the end of a feeding interval, the guide plate is moved away from the sprocket wheel by a bell crank mechanism. The bell crank mechanism comprises a bell crank having a movable axis which, in combination with other features of the mechanism, permits the guide plate to be moved away abruptly from the sprocket so that the feeding interval is brought to an abrupt halt without "chattering" or other slight uncontrolled movement of the strip.
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