Longitudinally divided cable sleeve of thermo-plastic synthetic material with a shape memory

• US 4,442,153 A
• Filed: 10/20/1981
• Issued: 04/10/1984
• Est. Priority Date: 12/19/1980
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Meltsch, Hans-Jurgen
• Primary Examiner(s): Dixon, Jr., William R.
• Application Number:
  US06/313,342
• Time in Patent Office: 903 Days
• Field of Search: 138/156, 138/166, 138/167, 138/168, 174/92, 174/DIG. 8, 428/99
• US Class Current: 428/99
• CPC Class Codes: B29C 61/10 by bending plates or sheets in general B29C53/36
• CPC Class Codes: F16L 47/22 using shrink-down material
• CPC Class Codes: F16L 58/16 the coating being in the form of a bandage
• CPC Class Codes: H02G 15/1813 Wraparound or slotted sleeves
• CPC Class Codes: Y10S 174/08 Shrinkable tubes
• CPC Class Codes: Y10T 428/1331 Single layer [continuous layer]
• CPC Class Codes: Y10T 428/24008 including fastener for attaching to external surface
• CPC Class Codes: Y10T 428/24231 At opposed marginal edges
• CPC Class Codes: Y10T 428/2424 Annular cover
• CPC Class Codes: Y10T 428/24248 One piece
• CPC Class Codes: Y10T 428/24256 Abutted or lapped seam
• CPC Class Codes: Y10T 428/24777 Edge feature

Abstract

A longitudinally divided cable sleeve having a strip-like sleeve member composed of thermo-plastic synthetic material having a memory shape characterized by the slot between the edges being covered by either the longitudinal edges being overlapped with respect to one another or one of the edges having an overlapping extension and with at least one of said edges having a mechanical reinforcement so that the edges are more thermally stable than the remainder of the strip when subjected to heat for shrinking the sleeve onto an object. The reinforcements may be completely embedded into the material of the strip, partially embedded or placed on outer surfaces thereof. Preferably, the reinforcements also support or provide interlocking connecting elements such as hook and catch elements for securing the edges together and the connection elements aid in taking up the shrinking force created during the shrinking operation.

Claims

1. In a longitudinally divided cable sleeve having a strip-like sleeve member composed of a thermoplastic synthetic member having a shape memory, said sleeve member having longitudinal edges and closure means for closing said edges together so that the edges can be sealed together after the cable sleeve has been wrapped around an object and the sleeve is shrinkable onto the enclosed object when heat is applied, the improvements comprising the closure means having means for overlapping a slot between the two edges and a mechanical reinforcement for the edges, said reinforcement including a reinforcing element secured to the cable sleeve adjacent each longitudinal edge with at least a portion of said edges overlapping, each of the edges with the reinforcing element being more thermally stable than the remainder of the sleeve member when subjected to the heat for shrinking the sleeve onto an object, said closure means having coacting closure elements comprising headed pins having heads adjacent one end being provided on one reinforcing element and apertures for receiving said headed pins being provided in the other reinforcing element, said apertures and headed pins being constructed to form a mutual locking of the two reinforcing elements and overlapping edges together when the pins are inserted into said apertures to hold the overlapping edges together.

2. In a longitudinally divided cable sleeve according to claim 1, wherein at least one reinforcing element is at least partially embedded into the material of the cable sleeve adjacent each longitudinal edge.

3. In a longitudinally divided cable sleeve according to to claim 2 wherein each of the reinforcing elements comprises a lattice mesh element.

4. In a longitudinally divided cable sleeve according to claim 2, wherein each of the reinforcing elements is formed of a tear resistant foil strip.

5. In a longitudinally divided cable sleeve according to claim 2 wherein the means for overlapping is formed by one of the longitudinal edges of the cable sleeve having a longitudinal extension for covering the gap between the two edges when the edges are held together by the closure elements.

6. In a longitudinally divided cable sleeve according to claim 5, wherein the longitudinal extension tapers to a feather edge at its free end.

7. In a longitudinally divided cable sleeve according to claim 2, wherein at least one of the reinforcing elements is completely embedded in the material of the cable sleeve adjacent the edge.

8. In a longitudinally divided cable sleeve according to claim 1, wherein the reinforcing elements are secured to the longitudinally cable sleeve by a heat resistant adhesive.

9. In a longitudinally divided cable sleeve according to claim 1, wherein the reinforcing elements are attached along the longitudinal edges by rivets.

10. In a longitudinally divided cable sleeve according to claim 1, wherein the reinforcing elements are sewn to the cable sleeve with tear proof threads.

11. In a longitudinally divided cable sleeve according to claim 1, wherein the reinforcing elements are arranged on both sides of at least one longitudinal edge of the cable sleeve.

12. In a longitudinally divided cable sleeve according to claim 1, wherein the reinforcing element of one longitudinal edge is spaced inwardly from said longitudinal edge to form an extension which acts as said means for overlapping the slot, said extension being provided with a coating of a fusable adhesive.

13. In a longitudinally divided cable sleeve according to claim 12, wherein the extension tapers to a feather edge so that it molds into the internal surface of the cable sleeve adjacent said other edge.

14. In a longitudinally divided cable sleeve according to claim 1, wherein each of the reinforcing elements are arranged at the end surfaces of each of the longitudinal edges and which include an integral longitudinally extending extension extending from a line spaced inward from an end surface of the edge, said extension being long enough to extend past said end surface and forming said means for overlapping the slot.

15. In a longitudinally divided cable sleeve according to claim 14, wherein said one edge having the integral extension has a reinforcing element on each surface of said edge, said integral extension covering the intermost reinforcing element and being secured thereto by an adhesive coating.

16. In a longitudinally divided cable sleeve according to claim 1, wherein each of the reinforcing elements are secured to the surface of the cable sleeve adjacent the end surface of each edge, and one of said edges including a sealing strip secured to an inner surface of the cable sleeve along a line spaced inward from the end surface of said edge, said sealing sleeve having a width so that when the edges are held together by the closure means, said sealing strip acts as said means for overlapping the slot.

17. In a longitudinally divided cable sleeve according to claim 16, wherein said one edge has a reinforcing element on each surface and said sealing strip covers the reinforcing element on the inner surface.

18. In a longitudinally divided cable sleeve according to claim 1, wherein one of the edges has a reinforcing element spaced from an end surface thereof, said sleeve includes a sealing strip covering said reinforcing element and acting to close the separation slot between the pair of edges when held together by the closure means.

19. In a longitudinally divided cable sleeve according to claim 1, wherein at least one of the edges has a groove-shaped indentation on a surface of the cable sleeve spaced inward from an end surface of said one edge and the reinforcing element associated with said one edge being disposed in said indentation with the upper surface being flush with the rest of the surface of said cable sleeve.

20. In a longitudinally divided cable sleeve according to claim 19, wherein the portion of the one edge between said indentation and the end surface is said means for overlapping the slot and is tapered into a feathered edge to facilitate merging with the surface of the cable sleeve adjacent the other edge.

21. A longitudinally divided cable sleeve comprising a strip-like sleeve member composed of a thermoplastic synthetic member having a shape memory, said sleeve member having longitudinal edges and closure means for closing said edges together in an overlapping sealed relationship, the closure means having a separate reinforcing element secured to the cable sleeve adjacent each longitudinal edge, the edges with the reinforcing elements being more thermally stable than the remainder of the sleeve when subjected to the heating for shrinking the sleeve onto an object, said closure means having headed pins having heads adjacent one end extending from the element secured to one edge of the sleeve member and apertures for receiving said headed pins being provided in the other edge and a reinforcing element secured thereto, said aperture and headed pins being constructed to form a mutual locking of the two elements together when the pins are inserted into the apertures to hold the edges in an overlapping relationship and sealed together during heat shrinking of the sleeve onto the enclosed object.

22. A longitudinally divided cable sleeve according to claim 21, wherein the one longitudinal edge has means forming an extension for engaging an inner surface of the sleeve member along a line spaced from the reinforcing elements.

23. A longitudinally divided cable sleeve according to claim 22, wherein said extension is provided with a coating of fusible adhesive for sealing the joint during the heat shrinking process.