Conveyors: power-driven – Conveyor section – Live roll
Patent
1993-07-27
1994-10-04
Valenza, Joseph E.
Conveyors: power-driven
Conveyor section
Live roll
198722, 2441371, B65G 1302
Patent
active
053518080
ABSTRACT:
A roller drive assembly comprises a drive roller mounted in a frame in such a way that the roller can be pivoted by a drive such as an electric motor from a lower retracted position when the drive roller is stationary to one of two, upper operating positions when the drive roller is rotating, dependent on the direction in which the roller is pivoted. An outer shell forming part of the drive roller for engaging an object to be conveyed defines a first larger-area frictional surface projecting above which is a plurality of second smaller-area frictional surfaces. These second frictional surfaces are are disposed in such a way that when the drive roller is pivoted from its retracted position into one of its operating positions, an object to be conveyed by the assembly is first contacted by the second frictional surfaces which, as the drive roller moves further into its operating position and thereby presses with greater force against the conveyed object, are displaced until they lie flush with said first frictional surface which can then make contact with said object to be conveyed.
REFERENCES:
patent: 3899070 (1975-08-01), Lang
patent: 4697694 (1987-10-01), Huber
patent: 4765273 (1988-08-01), Anderle
patent: 5205398 (1993-04-01), Hart et al.
Electro Pneumatic International GmbH
Valenza Joseph E.
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