GB190823061A - Improvements in and connected with Paper Cutting Devices. - Google Patents

Abstract

23,061. Klein, J. Oct. 29. Cutting-machines for paper.-Relates to machines for cutting webs of paper into pieces of any desired length, in which the upper feed - roll is provided with a longitudinal cutting - blade penetrating into a narrow groove in the lower feed-roll. The upper feed-roll 2 has a longitudinal groove in which is the blade carrier 5, mounted on a shaft 7. The blade 6 is normally retained within the periphery of the feed-roll by a spring 11, and is projected at intervals by means brought into action by a stop 22 on the worm-wheel 21, which gears with a removable worm 23 on the shaft of the roll 2. The pitch of the worm 23 is chosen so that the worm-wheel performs one revolution while the feed-rolls make a number of revolutions corresponding to the length of paper to be cut off. The stop 22 on the worm-wheel strikes against a stop 20 on a lever pivoted at 18, turning the lever so that it releases the projection 16 thereon from the projection 27 on the yoke 15 screwed to a cam 13. This cam is moved laterally by the spring 24, and comes into the track of a roller 9 on a lever fixed to the shaft 7 of the blade carrier, and a projection on the cam 13 turns the blade carrier momentarily into operating position. The stop 22 then passes the stop 20, releasing the lever 16, and a projection 25 on the end of the roll 2 returns the yoke 15 into engagement with the lever 16.