Soil plug release apparatus

Material or article handling – Device for emptying portable receptacle

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Details

47 73, 19880301, 198744, 414417, B65G 2504, B65G 6534

Patent

active

047705949

ABSTRACT:
Soil plug release apparatus is arranged to release plugs of soil from a tray of the type having an array of compartments arranged in rows and columns with each compartment having a hole in the base thereof. The apparatus has a pair of support members held in parallel spaced relationship, and a bridge member spanning the support members and having a curved upper surface, in which there is a row of spaced openings; the spacing between the openings corresponds to the spacing of the holes in a row of tray compartments. A pair of guides guide a tray between the support members transversely over the upper surface of the bridge. The guide means are such as to deform the underside of the tray to conform to the curvature of the bridge member at the point the tray passes over the bridge member. A plurality of cylinders each arranged to store a discrete bolus of air, are coupled one to each opening. The bolus of air is released from each cylinder when the holes in a row of compartments become aligned with the openings. This causes the plug of soil in each compartment to be ejected upwardly.

REFERENCES:
patent: 2271937 (1942-02-01), Engels
patent: 2523968 (1950-09-01), Paulson, Sr.
patent: 3272361 (1966-09-01), Vogel et al.
patent: 3294265 (1966-12-01), Roch et al.
patent: 4197674 (1980-04-01), Blackmore, Jr.
patent: 4314630 (1982-02-01), Greenwood, Jr.
patent: 4476973 (1984-10-01), Kessler et al.

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