Browse Prior Art Database

Heated Ribbon Soldering Device

IP.com Disclosure Number: IPCOM000073386D
Original Publication Date: 1970-Dec-01
Included in the Prior Art Database: 2005-Feb-22
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Ellsworth, GE: AUTHOR

Abstract

When a long line of fine wires is to be soldered to a circuit card, uniform heat transfer is a problem due to the lack of coplanarity between the wires. The use of a flexible ribbon-roller combination in place of the usual rigid soldering blade overcomes this problem.

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Heated Ribbon Soldering Device

When a long line of fine wires is to be soldered to a circuit card, uniform heat transfer is a problem due to the lack of coplanarity between the wires. The use of a flexible ribbon-roller combination in place of the usual rigid soldering blade overcomes this problem.

A continuously heated metallic ribbon 10 is supported on one end by a fixed mount 12. The other end of 10 is connected to a spring-loaded guide 14. The spring is adjusted to hold the ribbon taut, and a step down transformer power source, not shown, is connected to 12, 14 to heat 10 by passage of current through the same. A roller 16 is mounted on slide 18 which is driven along rail 20 by cylinder 22 at a controlled speed. Roller 16 is reciprocable under the control of cam follower 24 in directions 26 normal to the ribbon 10.

In operation, wires 28 to be soldered to Pad 30 are held in alignment and in contact with the solder coated pad, by two silicone rubber pressure pads, not shown, fore and aft of the soldering line. Ribbon 10 is suspended between the pressure pads and slightly above the wires. As cylinder 22 starts its stroke, cam follower 24 drops off cam 32, deflecting ribbon 10 into contact at the beginning of the line to be soldered. As roller 16 continues its travel, a small section of ribbon 10 contacts wires 28. Thus, departures from flatness in pad 30 are accommodated by the ability of roller 16 to follow. At the completion of the operation, a second cam 34...