Apparatus for automatically centering an endless band trained ov

Details Apparatus for automatically centering an endless band trained ov Apparatus for automatically centering an endless band trained ov

1977-10-13

1979-11-13

Scott, Samuel

Machine element or mechanism

Gearing

Toothed gear and recirculated unconnected elements

226 21, 198807, F16H 718, B65H 2526

Patent

active

041739043

ABSTRACT:
In an apparatus wherein an endless band is trained over a stationary guide roll and a stretching roll, and a nut-and-spindle mechanism at the ends of the stretching roll can displace the stretching roll in a plane defined by the axes of the rolls when the band is centered on the rolls, the band is automatically centered by two hydraulic double-acting cylinder-piston units. The first unit displaces either end of the stretching roll in the plane and the second unit simultaneously displaces one end in a plane perpendicular thereto. This displacement is effected in response to a control signal from a sensor adjacent each side edge of the band and tripped when the side edge moves into contact therewith as the band moves out of its centered position. The control signal operates a three-way solenoid valve in a hydraulic control circuit for the cylinder-piston units.

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