Constant conveyor web output velocity compensator for variable input web velocities
AssigneePako Corporation
InventorAlfred J. Gaskell
Life of this patent
Estimating the term…
Abstract
A compensator which permits the input velocity of a web conveyor system to be varied (reduced to zero if desired) while maintaining a constant output velocity and tension in the web. This is accomplished by a power actuated movable carriage having web rollers connected therewith for controllably varying the length of a multiple run web control path interposed at the input end of a belt conveyor system.
Claims9
A controllable input speed, constant tension and constant output speed comparator for a web conveyor system comprising:
- a plurality of spaced apart rollers defining a back and forth input speed control path,
- a web trained about said rollers and following the control path and providing a speed control takeup length,
- power actuated means for controllably varying the length of the control path to control the input speed of a strip entering the control path while maintaining a constant web output speed and
- driving means for imparting driving power to a set of rollers of the plurality to maintain a predetermined output velocity in the web and each of the rollers in the set of rollers having a spring spool demand driven roller for transmitting driving power from the driving means to the rollers.
A power-driven speed compensator for a web conveyor system to control the web input speed while the web is in motion traveling through the web path of the conveyor system and while maintaining a constant tension and constant output speed of a web for a limited time interval, said compensator comprising:
- a pair of generally opposed spaced apart sets of web-engaging rollers for providing a velocity compensating control path having a plurality of doubled back and forth web runs,
- first power means for driving said rollers,
- a web trained about the rollers and following the control path defined thereby, and
- second power means for controllably increasing and decreasing the spacing between the respective sets of rollers to positively control the length of the control path to produce a constant velocity output for a limited time period, while controllably varying the input velocity during the operation of the first power means and transportation of the web through the control path.
Dependencies are inferred from the claim text.