Method of applying a waterproofing jelly-like compound to an elongated strand and forming a sheath about the strand

Abstract

Abstract AN ELONGATED STRAND, SUCH AS CABLE CORE ASSEMBLY, IS ADVANCED LONGITUDINALLY THROUGH A FORMING TUBE OF APPARATUS FOR FORMING A SHEATH ABOUT TO STRAND WITH EDGE PORTIONS OF THE SHEATH OVERLAPPED TO FORM A LONGITUDINALLY EXTENDING SEAM. AS THE STRAND PASSES THROUGH THE FORMING TUBE A WATERPROOFING JELLY-LIKE COMPOUND IS INTRODUCED INTO THE FORMING TUBE AT A POINT SPACED FROM ITS ENTRANCE END AND UNDER RELATIVELY HIGH PRESSURE SUCH THAT THE COMPOUND COMPLETELY FILLS A CIRCUMFERENTIALLY EXTENDING PORTION OF THE SPACE BETWEEN THE STRAND AND THE FORMING TUBE TO PRODUCE A WATERPROOF LAYER OF THE COMPOUND WHICH ENCIRCLES THE STRAND AND WHICH PROVIDES A SMOOTH CYLINDRICAL SUPPORT SURFACE ABOUT WHICH THE SHEATH CAN BE FORMED IN TIGHT-FITTING RELATIONSHIP AND WITH A TIGHT SEAM AS THE STRAND EXITS FROM THE FORMING TUBE. THE PRESSURE AT WHICH THE WATERPROOFING JELLY-LIKE COMPOUND IS INTRODUCED INTO THE FOMING TUBE ALSO IN SUCH THAT THE WATERPROOFING COMPOUND FLOWS BETWEEN THE OVERLAPPED EDGE PORTIONS OF THE SHEATH TO SEAL AND WATERPROOF THE SEAM FORMED BY THE EDGE PORTIONS.

Inventors

• 👤 L Moody

Bibliographic Details