B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
271/68
B65H 23/00 (2006.01) B65H 20/24 (2006.01)
Patent
CA 1086788
ABSTRACT An apparatus is disclosed for controlling the continuously travel- ing web to an intermittently operating machine. A web tensioning means sup- plies the web to the infeed of the machine via a web guide extending between and eccentrically offset with respect to two rotary plates. Means are pro- vided for adjusting the eccentricity of the web guide and a counter-balance mechanism is included to balance its eccentric weight. Means are also pro- vided for varying the angular position of the web guide during rotation of the rotary plates. The web guide is a cylinder arranged so that it cannot turn about its own axis. Each end of the cylinder is fitted with an end plug having a slide shoe engaged with a radial groove in a support. The shoe is moved along the slot by a threaded rod mounted on the support. A similar threaded rod is carried by the adjacent rotary plate and serves to adjust the position of the counter-balance. The two threaded rods are coupled by a universal joint. A second radial groove in the support receives a shoe car- ried by one end of a rocker arm pivotted to the rotary plate, and having its other end engaged with a cam on a fixed side frame of the apparatus.
313538
Grob Jean
Roch Roger
Bobst S.a.
Smart & Biggar
LandOfFree
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