Transport mechanism for IC handlers

Details Transport mechanism for IC handlers Transport mechanism for IC handlers

1994-02-16

1995-11-28

Valenza, Joseph E.

Conveyors: power-driven

With means to facilitate working, treating, or inspecting...

Means engaging conveyor or load on a conveyor to align load...

1984711, 1988035, B65G 4700

Patent

active

054699533

ABSTRACT:
transport mechanism for integrated circuit (IC) handlers with four transport stations spaced 90.degree. apart on one circumference are supported by a cross-shaped contact arm, and below the circumference, contact-in, contact or test and contact-out stages are provided at intervals of 90.degree.. Each transport station has a vertically movable air chuck unit and an air chuck driving mechanism for driving the air chuck unit vertically and holding by suction and releasing devices under test. The transport station that has reached a predetermined position above the contact-in stage presses the air chuck unit down with the air chuck driving mechanism and suck and lifts the devices to be tested off the contact-in stage. In parallel with the operation at the contact-in stage, the transport station, staying above the contact or test stage, lowers the air chuck unit which holds devices to be tested and fixes them onto the contact or test stage to start testing them, and the transport station above the contact-out stage lowers the air chuck unit holding tested devices and releases them onto the contact-out stage, thereafter raising the empty air chuck unit. Each time the contact arm is turned 90.degree., these operations are repeated.

REFERENCES:
patent: 2915201 (1959-12-01), Calehuff et al.
patent: 4261681 (1981-04-01), Gates
patent: 4763405 (1988-08-01), Morita et al.
patent: 4907701 (1990-03-01), Kobayashi et al.

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