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Browse Prior Art Database

Vibratory Feeder Bowl Orientation for Two Ball Chip

IP.com Disclosure Number: IPCOM000093329D
Original Publication Date: 1967-Aug-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 69K

Publishing Venue

IBM

Related People

Aronstein, J: AUTHOR

Abstract

This vibratory feeder bowl orientates or rejects transistor chips having two-ball contacts, adjacent an edge, in transport to an operating station. The chip is to be orientated in a balls-down configuration with the two-balls toward the top of the feeder.

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Vibratory Feeder Bowl Orientation for Two Ball Chip

This vibratory feeder bowl orientates or rejects transistor chips having two- ball contacts, adjacent an edge, in transport to an operating station. The chip is to be orientated in a balls-down configuration with the two-balls toward the top of the feeder.

The chip approaches this section in a balls-down configuration with an edge riding on ledge 2 and its rear face supported by support surface 3. In one of four possible orientations 1a, 7a, 12a, and 13a, orientation la is the desirable one. Surface 3 is relieved at 4, as in drawing A, and further downstream, along the path of chip travel, ledge 2 is dropped away downwardly at 5. Relieved portion 4 forms transfer-ledge 6.

Drawing 7 shows chip 1 moving through the feeder in the balls-up configuration and chip 7 being rejected in the balls-down configuration. When chips 7 travel from position 1a to dropoff portion 5 of ledge 2, they ride down until a ball contact engages ledge 6, as shown in the chip position 1b. On further travel, chip 1 rotates clockwise until both ball contacts ride on ledge 6, as shown in position 1c.

As chips 7 travel from position 7a to the portion 4, the ball contacts engage ledge 6 and travel past dropoff 5 to the cutout section 8, as shown in chip position 7b. When chips 7 reach cutout 8, they are tilted rearwardly to bight 9 of cutout 8. Here chips 7 either tip and fall over backwardly as at 10 or slide down as at 11 after the ball conta...