| 摘要 |
<p>1,157,696. Making conductor coils. REYNOLDS METALS CO. 23 Nov., 1966 [7 March, 1966], No. 52491/66. Heading B3A. [Also in Divisions B6 and H1] Strip conductor coils are made by coating a strip of conductive material 72, e.g. aluminium, with insulating material, e.g. epoxy resin, whose longitudinal edges are adjacent those of the strip and removing the edges of the conductive material to form new edges inwardly offset from the edges of the coating before the strip is wound into the strip conductor coil. The conductor strip 72 is coated by rollers 77 on its underside and the resin partially cured in a heater 78. The strip is then slit longitudinally into strips 31 and wound on a pair of shafts 80. Each shaft containing a number of wound strips 43 is dipped in an etching bath containing caustic or acid wherein the conductive material is etched to offset its longitudinal edges from those of the coating. After etching for six minutes the wound strips 43 are rinsed and deoxidized for two minutes in dilute sulphuric acid. The wound strips are wound on a core (32), Fig. 1 (not shown), and the coating completely cured by heating which also heat seals the turns and blocks the coil ends. The heating may be in an oven, or by induced eddy currents or by passing current through the strip. The wound coil can be shaped prior to curing, Fig. 6 (not shown). In an alternative embodiment the strips 31 are passed through etching baths before being wound directly into a conductor coil.</p> |
