Bonded sheath cable with lubricant over seam
AssigneeSumitomo Electric Research Triangle, Inc.
InventorsYasunori Saito, Kenji Morita, Yves P. P. Simons, Fred T. McDuffee
Life of this patent
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Abstract
A bonded sheath cable is disclosed of the type having a metallic shield wrapped around a cable core so as to form a longitudinal seam. A jelly-like lubricant overlays the metallic shield seam area and serves to decouple the bond between the metallic shield and an outer plastic jacket. The lubricant allows for relative movement between the longitudinal ends of the metallic shield and the overlying jacket layer without damaging the jacket layer if the bond between the overlapping ends of the metallic shield is broken and the cable twisted during installation or in some other manner.
Claims23
A bonded sheath cable comprising:
- a cable which includes at least one conductor;
- a layer of plastic material which encloses said cable;
- a metallic shield which is wrapped around said layer of plastic material to form a longitudinal overlapped seam having overlying and underlying edge portions formed by overlapping adjacent longitudinal edges of said shield, said edge portions being bonded together;
- a layer of viscous lubricating material which is applied along the length of said longitudinal overlapped seam;
- and
- a jacket layer of plastic material which is bonded to substantially all of the outer surface of said shield except for the overlapped seam area to which said lubricating material has been applied;
- whereby said jacket layer is decoupled from said overlapped seam area of said shield in order to allow such relative movement therebetween as may be necessary to resist tearing of said jacket layer when the cable is subjected to twisting forces.
A bonded sheath cable comprising:
- an optical fiber communications cable comprising a plurality of light transmitting waveguides;
- a layer of plastic material which encloses said optical fiber cable;
- a corrugated metallic tape which is wrapped around said layer of plastic material to form a longitudinal overlapped seam with overlying and underlying edge portions formed by overlapping adjacent longitudinal edges of said tape, said edge portions being bonded together;
- a layer of jelly-like lubricating material which is applied along the length of said overlapped seam;
- and
- a jacket layer of plastic material which is bonded to substantially all of the outer surface of said tape except for the overlapped seam area to which said lubricating material has been applied;
- whereby said jacket layer is decoupled from said overlapped seam area of said tape in order to allow such relative movement therebetween as may be necessary to resist tearing of said jacket layer when the cable is subjected to twisting forces.
Dependencies are inferred from the claim text.