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Tapered Feed Tracks to Handle Surface Mounted Devices

IP.com Disclosure Number: IPCOM000061148D
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Privette, RA: AUTHOR [+2]

Abstract

The existing feed tracks, into which wing leaded surface mounted devices (SMDs) are fed manually by hand, permit excessive tolerances between the SMD's leaded edge and the edge of the trac the SMDs pick-up position. Thus, in a pick and place operation, this excessive tolerance requires that the SMD's be mechanically centered after pick-up with the machine's tweezer jaws. However, experience has shown that the centering effort is ineffective when attempted against the SMD's protruding leads.

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Tapered Feed Tracks to Handle Surface Mounted Devices

The existing feed tracks, into which wing leaded surface mounted devices (SMDs) are fed manually by hand, permit excessive tolerances between the SMD's leaded edge and the edge of the trac the SMDs pick-up position. Thus, in a pick and place operation, this excessive tolerance requires that the SMD's be mechanically centered after pick-up with the machine's tweezer jaws. However, experience has shown that the centering effort is ineffective when attempted against the SMD's protruding leads.

In the figure, there is shown a feed track 1 which is an improvement over existing feed tracks. The feed track 1 tapers, or narrows, from the SMD's load point 2 to its pick-up point 3. At the pick-up point 3 only a small tolerance exists between the edge of the SMD's 4 and the edge of the track 1. When the SMD's 4 reach the pick-up end 3, the SMD's are now pre-centered thereby obviating an additional centering step in the pick-up operation.

The edge of the load point 2 of the track 1 is made to accept and mechanically lock in place the carrier 5 for the SMDs as they are shipped directly from the vendor. The carrier 5, in an inclined position, is simply plugged into the load end of the track 1 thereby permitting the SMDs to be self fed and eliminating the time-consuming hand loading of the SMDs.

Disclosed anonymously.

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