Conveyors: power-driven – Conveyor section – Live roll
Patent
1997-09-05
2000-04-11
Terrell, William E.
Conveyors: power-driven
Conveyor section
Live roll
1984603, B65G 4729
Patent
active
060478128
ABSTRACT:
An asynchronous conveyor system with controlled smooth stopping and starting. The conveyer system defines a path with sections (Z1 . . . Z6) independently driven. The conveyed items (2A, . . . 2D) may be independently accumulated on one or more path sections of the conveyor system. External sensors (8, 8A, 14, 14A) are distributed along different path sections of the conveyors system and are used to control the location and the flow of items in either direction. An idler wheel with a sensed rest position is also disclosed as an item sensing mechanism. The drive system for the conveyor system may be stepper motors, DC, AC, hysteresis motors or other such motors. In each case the motors are controlled to provide smooth transportation of the items. In another embodiment, servomotors are used and an internal sensed characteristic of the servo motor provides and indication of an item being on the conveyor path section associated with the servo. The operation then is similar to the use of an actual sensor. The logic controller for the conveyor system may be locally distributed or centrally located.
REFERENCES:
patent: 4793262 (1988-12-01), Horn
patent: 5086910 (1992-02-01), Terpstra
patent: 5285887 (1994-02-01), Hall
patent: 5318167 (1994-06-01), Bronson et al.
patent: 5538097 (1996-07-01), Bakkila et al.
Anthony Christopher M.
Clement Warren J.
Horn George W.
Pyke Adrian L.
Cohen Jerry
Deuble Mark
Kaye Harvey
Middlesex General Industries, Inc.
Terrell William E.
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