Forming of cable splice closures

• US 4,528,419 A
• Filed: 12/12/1983
• Issued: 07/09/1985
• Est. Priority Date: 12/12/1983
• Status: Expired due to Fees

• Current Assignee: Northern Telecom Limited (Nortel Networks Corporation)
• Original Assignee: Northern Telecom Limited (Nortel Networks Corporation)
• Inventors: Huszarik, Fred A., Charlebois, Leonard J., D'Aoust, Ronald R.
• Primary Examiner(s): Dawson, Robert A.
• Application Number:
  US06/560,542
• Time in Patent Office: 575 Days
• Field of Search: 29/868, 29/872, 29/873, 156/49, 156/55, 156/56, 156/245, 264/272.11, 264/272.14, 264/272.15, 174/88 R, 174/88 S
• US Class Current: 174/88.00R
• CPC Class Codes: H02G 1/145 Moulds
• CPC Class Codes: H02G 15/117 for multiconductor cables
• CPC Class Codes: Y10T 29/49194 Assembling elongated conductors, e.g., splicing, etc.
• CPC Class Codes: Y10T 29/49202 including oppositely facing end orienting

Abstract

A method of forming an encapsulated splice region between two cable ends in which, after end portions of the core have been exposed beyond the jacket and sheath or shield, the conductors are splayed outwards and the cable end portions are brought close together. Splices are then formed between conductors of the two cables and the conductors are folded over either one cable jacket or the other to locate each splice upon and supported by the jacket. Each splice is individually covered with sealing material and end regions of the cables are encapsulated so as to encapsulate the splices and fluid tightly seal them.

Claims

1. A method of forming an encapsulate splice region between two cable ends comprising:

removing core surrounding material from end portions of two cables to provide end portions of core surrounding material and cable core regions projecting a certain distance beyond said end portions of surrounding material;

turning the conductors of said regions so that they extend radially outwards from the cables;

bringing the cable end portions and portions of core surrounding material closer together and axially disposed relative to each other;

electrically connecting conductors of one cable end with those of the other to form conductor splices;

positioning splices upon first overlapped and contacting windings of heat softenable sealing tape around an end portion of core surrounding material with the conductors extending across the end portion and to their respective cable cores and with the splices disposed in spaced positions both axially of and circumferentially around the end portion;

wrapping second windings of heat softenable sealing tape in overlapped and contacting relatinship over the splices and first windings;

and encapsulating axially over the end portions of core surrounding material to cover the splices and windings, heat provided while encapsulating serving to soften the sealing tape to cause it to merge into an integral whole completely surrounding each splice.

2. A method according to claim 1, comprising encapsulating by moulding an encapsulation of plastics material around the splice region, the heat from the plastics material in a molten state causing the sealing tape to merge into the integral whole, and cooling the encapsulation to shrink it upon the softened sealing tape, the resltant pressure causing the merged and softened single mass of tape around each splice to become in intimately and fluid tight sealing contact with the splice.

3. A method according to claim 1, wherein the material of the radially outer regions of the core surrounding material and the encapsulation material are compatible and merge and bond together during moulding.

4. A method according to claim 3, wherein the heat softenable sealing tape is compatible with the encapsulation material, the sealing tape is wrapped with a containing material which is non heat softenable at the moulding temperature, the containing material holding the sealing tape in its position after softening, said projecting sealing tape bonding to encapsulation material during moulding.

5. A method according to claim 4, wherein the radially outer regions of the core surrounding material and the encapsulating material are or contain polyethylene, and the sealing tape is an ethylene propylene rubber tape.

6. A method according to claim 1, wherein the splices are positioned upon the first windings in a plurality of axially spaced apart, circumferentially extending rings around the windings, and the splices in each ring are circumferentially spaced apart.

7. A method according to claim 6, wherein the splices are in circumferentially staggered relationship from one ring to the next.

8. An assembly of two telecommunications cables disposed end-to-end with conductors of each cable core electrically connected each to one conductor of the other cable to form a conductor splice, the conductors for each splice extending outwardly from the cores and extending axially alongside core surrounding material of one of the cables to dispose the splice radially outwards of the core surrounding material with splices disposed in spaced positions both axially of and circumferentially around an end portion of the core surrounding material, each splice individually sealed by sealing material, and an encapsulation extending across the two cable ends so as to surround the sealed splices and end portions of the core surrounding material.

9. An assembly according to claim 8, wherein the splices are located upon the end portion in a plurality of axially spaced apart, circumferentially extending rings with the splices in each ring circumferentially spaced apart.

10. An assembly according to claim 9, wherein the splices are in circumferentially staggered relationship from one ring to the next.