Device for detecting errors in top/bottom/front/back orientation

Details Device for detecting errors in top/bottom/front/back orientation Device for detecting errors in top/bottom/front/back orientation

1991-12-02

1993-05-04

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356398, G01N 2186

Patent

active

052084647

ABSTRACT:
A lead frame transporting device, which uses a pusher to feed a lead frame from a loader onto feeder rails and two optical sensors that are positioned above the both sides of the lead frame. The pusher feeds the lead frame a predetermined distance so that a first detecting point of the lead frame arrives under the sensors and then further feeds the lead frame so that a second detecting point of the lead frame arrives under the sensors. The sensors detects detecting holes of the lead frame at the first and second detecting points so that top or bottom and front or back of the lead frame is detected, so that improperly oriented lead frame is prevented from further being fed to a next step.

REFERENCES:
patent: 4736108 (1988-04-01), Comstock et al.
patent: 4929845 (1990-05-01), Amir et al.

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