Conveyors: power-driven – Conveyor system for arranging or rearranging stream of items – By laterally or vertically moving successive items in...
Patent
1973-11-08
1976-03-09
Blunk, Evon C.
Conveyors: power-driven
Conveyor system for arranging or rearranging stream of items
By laterally or vertically moving successive items in...
209327, 209329, 209365A, B65G 2700
Patent
active
039426289
ABSTRACT:
An improved table feeder type material handling apparatus includes a support table or tray which is moved through forward and return strokes by a dirve assembly to convey ore or other material disposed on the tray in a forward direction relative to the tray. In accordance with a feature of the present invention, the stroke or distance through which the tray is moved can be varied while maintaining the stroke rate substantially constant. To provide this capability, the drive assembly includes a rotatable input member which is connected with the support tray by a linkage. A connection between the linkage and the input member is offset relative to the axis of rotation of the input member. Therefore, when the input member is rotated about its central axis, one end of the linkage is moved along a circular path. The stroke distance through which the support tray is moved is adjusted by varying the angular relationship between the central axis of the input member and the path of movement of the support tray to thereby move diametrically opposite portions of the circular path relative to the path of movement of the support tray. A screening table or tray receives material from the support tray. The screening tray moves through forward and return strokes with the support tray. In addition, the drive assembly is effective to move the screening tray through up and down strokes to promote the movement of small particles of ore through openings in the screening tray.
REFERENCES:
patent: 604061 (1898-05-01), Mendenhall
patent: 1170077 (1916-02-01), Lawry
patent: 3250380 (1966-05-01), Allen et al.
patent: 3265196 (1966-08-01), Allen et al.
Blunk Evon C.
Morgardshammar Aktiebolag
Watts Douglas D.
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