GB713861A - Improvements in wrapping machinery - Google Patents

Abstract

713,861. Operating clutches. ROSE BROS. (GAINSBOROUGH) , Ltd. Oct. 28. 1952 (Oct. 31, 1951], No. 25410/51. Class 80 (2) [Also in Groups XVI and XVII] In a wrapping-machine (see Group XVII) one of a pair of web-feeding rollers 11 is driven through a clutch 33, 38 which is engaged periodically by a lever 39 operated by a cam 41, the lever being associated with stop-mechanism (not shown) which prevents engagement of the clutch if an article to be wrapped is not fed into the machine. Am extension 42 of the roller shaft 31 carries a flanged sleeve 43 provided with a friction disc 44, and a further flanged sleeve 46 secured to the sleeve 43 and extension 42 carries bearing bushes 48 in which are slidably mounted a series of studs 49 carrying a plate 52 secured to a second fraction disc 53. A centre plate 54 having an extending arm 56 passing between a pair of fixed stops 57, 58 and urged by a spring 59 against the stop 58, is freely mounted on the sleeve 43 and is engaged with the friction discs by springs 51 encircling the studs. During 'the feeding movement of the rollers, the spring 59 is tensioned by the movement of the arm 56 against the stop 57, so that on cessation of the feeding movement it moves the arm in the opposite direction against the stop 58, thus causing a slight reverse movement. of the rollers.