Heat-recoverable article

Stock material or miscellaneous articles – Structurally defined web or sheet – Edge feature

Patent

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138156, 174DIG8, 219535, 219549, 428 351, 428 349, 428225, 428226, 428245, 428293, 428343, H05B 310

Patent

active

052367657

ABSTRACT:
The invention relates to heat-recoverable covers which comprise embedded electrical resistance heaters, and to methods of covering an elongate object using such covers. In a preferred embodiment (FIG. 5), the cover comprises a heat-recoverable polymeric sheet (22) or fabric, provided with upstanding rails (24,25) as a first closure means. A heating element (36) is embedded in the sheet and arranged to follow a serpentine path such that each return loop portion 38 projects beyond the edges of the cover. The sheet is coated on its inner surface with a layer of adhesive and/or sealant (28,30). In use, the cover is wrapped around a substrate (32) at least once, and first and second closure means (24,25and 26,27) are engaged to hold the cover in the wrapped configuration. The cover is then heated to cause the cover to recover, and the adhesive and/or sealant to form a seal.

REFERENCES:
patent: 3235289 (1966-02-01), Jones
patent: 3467761 (1969-09-01), Plummer
patent: 4323607 (1982-04-01), Nishimura et al.
patent: 4369356 (1983-01-01), Tsurutani et al.
patent: 4370548 (1983-01-01), Nagasawa et al.
patent: 4384906 (1983-05-01), Molinari et al.
patent: 4412125 (1983-10-01), Nagasawa et al.
patent: 4419156 (1983-12-01), Diaz et al.
patent: 4472222 (1984-09-01), Moisson et al.
patent: 4675512 (1987-06-01), Doucet et al.
Dec. 1983, "Welded Polyethylene Splice Closures A Reliable Alternative" by D. F. Gill.
Dec. 1983, "Welded Polyethylene Splice Closures A Reliable Alternative" by D. F. Gill.

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