Browse Prior Art Database

Drum Wound Cable

IP.com Disclosure Number: IPCOM000051778D
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 75K

Publishing Venue

IBM

Related People

Bilsback, MS: AUTHOR

Abstract

This article describes an apparatus and method of forming a flat cable comprising a plurality of conductors laminated between layers of dielectric and adhesive.

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Drum Wound Cable

This article describes an apparatus and method of forming a flat cable comprising a plurality of conductors laminated between layers of dielectric and adhesive.

As illustrated schematically in Fig. 1, the essential elements of the apparatus are a rotating drum 10, a lead screw 12, a spool holder 16, a wire guide 18 and a tensioning device 20. A base dielectric material/adhesive 22 is wrapped around the drum 10 with the adhesive side out. The base dielectric can comprise a material such as polyimide, polyester, NOMEX*, etc., while the adhesive can be pressure-sensitive or heat-sensitive thermosetting or thermoplastic material.

As the drum 10 rotates, wire 24 is helix wrapped to the drum at the desired pitch as in conventional coil winding. The wire guide 18 is driven by the lead screw 12, which in turn is coupled to the rotating drum 10. A precision lead screw can be used to insure very accurate wire spacing, while the adhesive surface of the base material 22 holds the wires in position by winding directly on the pressure-sensitive base or the wire can be preheated if using thermosetting or thermoplastic adhesive.

When the desired number of turns have been wound on the helix at the desired pitch, the wire-wrapped base 22 is then removed and a cover coat laminated to it. The thus formed flat cable 26, shown in Fig. 2, can be cut into the number and size of segments desired, and the conductors 28 at each end of the resulting cables exposed to facili...