Importance

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Abstract

Apparatus for subdividing a running web into narrower webs has a counterknife which is driven to rotate about a substantially horizontal axis. A second knife is freely rotatably mounted in a holder at a level above the counterknife. The holder is carried by the lower end of a vertically movable and turnable rod-like guide which can be moved up and down by a single-acting fluid-operated motor in cooperation with two springs or sets of springs. When the guide reaches its lower end position, the motor causes a conical end face at the lower end of a split sleeve to engage a complementary conical face at the upper end of a fixed guide member for the guide, whereby the sleeve clampingly engages the guide and locks it to the stationary cylinder of the motor so that the second knife is fixedly held at the selected level for any desired interval of time. An adjusting mechanism employing one or more fluid-operated motors is installed at the lower end of the guide and is actuatable to move the second knife and its holder in parallelism with the axis of rotation of the counterknife.

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First Claim