GB796190A - Web drawing means - Google Patents

Abstract

796,190. Feeding webs. TIMSONS. Ltd., and TIMSON, E. A. Dec. 5, 1956 [Dec. 6, 1955], No. 34958/55. Class 100(1) Web-feeding apparatus comprises a resilient roller 1 in peripheral contact with a driven roller 4 and a freely rotatable roller 5 co-operating with the resilient roller, such that a web may be gripped between the rollers 1, 5 to effect web feed, at least one of the rollers being mounted in movable bearings and loaded to exert a variable pressure between the driven roller 4 and the resilient roller 1, due to it being more resilient than the other roller, so as to deform the latter roller to thereby vary the speed of the web. As shown, a roller 1 of rubber or similarly deformable material is carried by a spindle 2 mounted in levers 3 which can rock about an axis a. A driven roller 4 of steel contacting the periphery of the roller 1 is mounted in fixed bearings. A roller 5 of steel is rotatably mounted in arms 7a of bell-crank levers 7. The bellcrank levers 7 rock about an axds b. A flexible cable 8 carrying weights 10 is attached to arms 7b of the levers 7, such that the roller 5 presses the roller 1 into contact with the roller 4, thereby deforming the surface of the roller 1; increases in such pressure causes the roller 1 to rotate more slowly and vice versa. In a modification, both the rollers 1 and 5 are mounted in bell-crank levers which are adjustably loaded to rock the rollers 4 and 5 downwardly. In a further modification, the roller 1 is mounted in fixed bearings, while the rollers 5 and 4 are mounted in bell-crank levers adjustably loaded so as to press against the roller 1 interposed therebetween.