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Vibratory Feeder Bowl With Missing Contactor Ball Transistor Chip Rejection

IP.com Disclosure Number: IPCOM000094005D
Original Publication Date: 1966-Apr-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Mozer, DT: AUTHOR

Abstract

A vibratory feeder bowl is used to feed transistor chips having ball contacts to a work station. One section of the feeder bowl is arranged to reject transistor chips having missing contactor balls from those chips fed to the work station. A mechanically good, properly oriented transistor chip passes through this section of the feeder bowl unaffected.

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Vibratory Feeder Bowl With Missing Contactor Ball Transistor Chip Rejection

A vibratory feeder bowl is used to feed transistor chips having ball contacts to a work station. One section of the feeder bowl is arranged to reject transistor chips having missing contactor balls from those chips fed to the work station. A mechanically good, properly oriented transistor chip passes through this section of the feeder bowl unaffected.

Transistor chip 1 having proper contactor balls is shown passing into the chip rejection section of the vibratory feeder bowl.

Within the rejection section the transistor chip is progressively oriented and checked several times for the presence or absence of ball contacts. The orientation and checking is accomplished by a variety of specially designed ledges 2.

The transistor chip progressively hangs from each of its ball contacts from a series of ledges 2 as it moves through the rejection section. However, should one of the ball contacts be missing the transistor chip falls into the center of the feeder bowl and is rejected. A chip 3 missing one contactor ball is shown being rejected by the section. Another transistor chip 4 having all contact balls is shown passing from the transistor chip rejection section hanging from ledge 5 by one contactor ball.

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