| 摘要 |
Apparatus for marking a succession of objects moving past a marking station along a conveyor. A pendulum mounted marking head which when not in use is suspended in a first, horizontal position out of the path of the objects, is provided. A sensor is energized when an object begins to approach the marking station move the marking head into a second, vertical, position spaced from but closer to the path of the object. As the object more closely approaches the marking station the marking head, still in vertical position, is moved into the path of the object to mark it, following which the marking head is retracted into its first position.
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