Heat-recoverable sealing article with self-contained heating mea

Details Heat-recoverable sealing article with self-contained heating mea Heat-recoverable sealing article with self-contained heating mea

1975-08-04

1978-04-18

Askin, Laramie E.

Electricity: conductors and insulators

Conduits, cables or conductors

Combined

156 49, 156 86, 156275, 174 35C, 174DIG8, 219505, 219548, 219553, 428 36, 428913, H02G 1518, H02G 114, B29C 2724, H05B 310

Patent

active

040852865

ABSTRACT:
A heat recoverable article is so configured that it can be positioned around a pipe or cable joint or splice which it is desired to encapsulate or seal. Means for sealing a splice involving a plurality of cables of the same or varying sizes are provided. The article includes a closure means for holding the article together after it has been positioned around the splice to be sealed. In a preferred embodiment, the inner surface of the article contains a heat activated adhesive or sealant to environmentally encapsulate the splice and the outer layer of the article is a heat recoverable insulating material. In a particularly preferred embodiment, the article has self-contained heating means, which heating means comprises a polymeric material having dispersed therein a conductive filler, said heating means exhibiting a positive temperature coefficient of resistance so as to render it self-regulating.

REFERENCES:
patent: T905001 (1972-12-01), Day
patent: 2110457 (1938-03-01), Wentz
patent: 3243753 (1966-03-01), Kohler
patent: 3274302 (1966-09-01), Anderson et al.
patent: 3455336 (1969-07-01), Ellis
patent: 3705950 (1972-12-01), Jirka et al.
patent: 3717746 (1973-02-01), Breitweiser
Raychem Corporation publication entitled "New In-Line System for Communication Cable," dated 9-1971, 2 pp.

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