Forming sealed seams in moisture barriers for cables

Details Forming sealed seams in moisture barriers for cables Forming sealed seams in moisture barriers for cables

H - Electricity

01

B

26/129, 154/36,

H01B 13/10 (2006.01)

Patent

CA 1054038

FORMING SEALED SEAMS IN MOISTURE BARRIERS FOR CABLES Abstract of the Disclosure In the manufacture of a communications cable, a moisture barrier comprising a corrugated metallic tape is wrapped longitudinally about a cable core to form an over- lapped seam, with at least a portion of the moisture barrier which forms the seam being precoated with an adhesive mate- rial. Heat is applied to at least the portions of the moisture barrier which form the seam while the portions are maintained spaced apart to permit a stripe of adhesive material in molten form to be introduced into the seam. Then the enclosed cable core is advanced between coacting rollers which apply forces to the moisture barrier to cause the spaced apart portions to engage each other with the stripe filling the spaces between associated corrugations to form a reliably sealed seam. A longitudinally extending mandrel supports the barrier during the application of the forces to preserve the configuration of the enclosed core and to prevent damage to the core or the moisture barrier.

218537

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