Stock material or miscellaneous articles – Hollow or container type article – Cellular material derived from plant or animal source
Patent
1979-08-31
1986-02-11
Kittle, John E.
Stock material or miscellaneous articles
Hollow or container type article
Cellular material derived from plant or animal source
428212, 174DIG8, 138 95, 138 96R, 403 29, 403 30, 285381, F16B 400, F16L 5510, B65D 5900
Patent
active
045698686
ABSTRACT:
Heat-recoverable articles, especially heat-shrinkable tubular articles, having an open end are formed so that the section adjacent said open end has a lower recovery ratio than a section adjacent thereto, thereby substantially reducing the risk of splitting when the degree of recovery is high or in applications where a high degree of unrecovered strain remains after recovery about a substrate such as a supply line. A preferred article is a tubular cap which has an open end section having a first expansion ratio, an intermediate section having a second expansion ratio and a closed end section having a third expansion ratio, the second expansion ratio being greater than the first and third expansion ratios. Such a cap may be employed to seal a conduit against ingress of moisture and other contaminants. When a supply line is subsequently to be passed through the conduit the closed end may be removed and the article shrunk to grip the supply line.
REFERENCES:
patent: 3448182 (1969-06-01), Derbyshire et al.
patent: 3526683 (1970-09-01), Heslop et al.
patent: 3678174 (1972-07-01), Ganzhorn
patent: 3847183 (1974-11-01), Meyer
patent: 3992570 (1976-11-01), Beinhauer
patent: 4194082 (1980-03-01), Campbell
patent: 4196308 (1980-04-01), Siden
De Blauwe Francis J. A. M. C.
Selleslags Frank K. A.
Kittle John E.
N.V. Raychem S.A.
Seidleck James J.
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