Lead frame conveying apparatus

Details Lead frame conveying apparatus Lead frame conveying apparatus

1989-01-06

1990-07-10

Watson, Robert C.

Work holders

Holder inserted within work aperture

Holder mounted for movement

269 52, B23Q 106

Patent

active

049402170

ABSTRACT:
An improved lead frame conveying apparatus for conveying a lead frame to a bonding position has two pins each with a tapered end which is provided for being inserted into a positioning hole in a lead frame. The tapered end has an upper portion the diameter of which is smaller than the diameter of the positioning hole in the lead frame and a lower portion the diameter of which is larger than the diameter of the positioning hole. The lead frame is supported by the tapered ends of the pins which engage the round edges of the positioning holes. The tapered pins are moved controllably in this state, thereby feeding the lead frame to the bonding position. Since the weight of lead frame tends to push the lead frame down on the pins, the centers of the positioining holes and the tapered pins become automatically aligned, bringing about correct aligning of the lead frame.

REFERENCES:
patent: 3906607 (1975-09-01), Gusev
patent: 4390172 (1983-06-01), Gotman
patent: 4444541 (1984-04-01), Bergman
patent: 4516318 (1985-05-01), Kirschenman
patent: 4567938 (1986-02-01), Turner
patent: 4586702 (1986-05-01), Chambers
patent: 4700488 (1987-10-01), Curti
patent: 4729551 (1988-03-01), Glessner et al.

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