Air-assist accumulating and transfer unit for an electronic devi

Details Air-assist accumulating and transfer unit for an electronic devi Air-assist accumulating and transfer unit for an electronic devi

1986-05-16

1988-11-01

Barefoot, Galen

Conveyors: fluid current

With diverse power-driven conveyor

Rotary

406 63, 406 85, 406 88, 361331, 209573, 312 971, B65G 5308

Patent

active

047814942

ABSTRACT:
An accumulating and transfer unit for handling electronic devices such as integrated circuits (ICs), especially surface mounted devices (SMDs). The unit includes guideways mounted circumferentially around a central shaft between two end plates and is inclined from the horizontal to utilize gravity, in cooperation with the levitation provided by a continuous or pulsed stream of air, to move the parts longitudinally in a column from the raised end of the unit to the lower end. In one embodiment, the guideways consist of a generally U-shaped track mounted on a track support and secured with a locking plate. A pair of longitudinally extending spaced apart walls on the bottom of each track act in cooperation with the track support and the locking plate to form a channel that directs the pulsed air from a supply tube at one end of the channel to a series of spaced apart apertures formed in the bottom wall of the track disposed so that the air acts through the apertures on the ICs held in the track. The guideways rotate around the central shaft from a single input port to a single exit port. The ICs load and unload from the track in a generally straight line column. The air can be heated or cooled.

REFERENCES:
patent: 1310504 (1919-07-01), Rydquist
patent: 2044998 (1936-06-01), Smith
patent: 2592038 (1952-04-01), Kimsey
patent: 2646891 (1953-07-01), Morgan
patent: 2889187 (1959-06-01), Caruso
patent: 3158417 (1964-11-01), Johnson
patent: 3710958 (1973-01-01), Crowley et al.
patent: 4478352 (1984-10-01), Amundson
patent: 4546404 (1985-10-01), Cedrone et al.

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