Oscillating bed seed coating machine for particulate material

Details Oscillating bed seed coating machine for particulate material Oscillating bed seed coating machine for particulate material

1994-12-06

1996-10-22

Czaja, Donald E.

Coating apparatus

Projection or spray type

Coating moving mass of solid particulate work

118314, 118 13, 118 16, 118 20, B05B 1700, A01C 106

Patent

active

055672388

ABSTRACT:
An apparatus for coating seeds and particulate material includes an elongate tray operably mounted on a support frame with a motor for oscillating the tray to move particulate material from a rearward end to a forward end therealong. The tray includes a perforated support surface with a saw-toothed cross-sectional shape such that the particulate climbs the inclined tread of each sawtooth and drops from the forward end of one tread to the rearward end of an adjacent tread to form a "curtain". A plurality of spray nozzles are located over the tray to direct coating solution onto the seeds as they move along the tray. Preferably, the nozzles direct spray towards the curtain of falling seeds between the treads. An upper housing on the support frame includes an air plenum which directs air downwardly onto the seeds on the support surface and through the perforated support surface to a second air plenum formed under the support surface. A flexible seal connects the tray to the upper housing to form an air seal yet permit oscillating movement of the tray. An exhaust fan is connected to the second air plenum to exhaust air from the coating apparatus and create a negative pressure within the coating apparatus. Preferably, air provided to the housing is heated, to enhance drying of the coating sprayed on the particulate material.

REFERENCES:
patent: 2799241 (1957-07-01), Wurster
patent: 3533829 (1970-10-01), Quanquin
patent: 3894508 (1975-07-01), Burgess
patent: 4640218 (1987-02-01), Motoyama et al.
patent: 4808424 (1989-02-01), Wadell
patent: 5299366 (1994-04-01), Maier et al.

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