Pipes and tubular conduits – Flexible – Casing
Patent
1981-10-13
1984-01-31
Shepperd, John W.
Pipes and tubular conduits
Flexible
Casing
383120, 206802, A22C 1300
Patent
active
044284020
ABSTRACT:
The specification describes a shirred synthetic casing stick closed at one end by first extending an end portion of the shirred stick to form an unshirred end casing portion. The end casing portion is then twisted at a point to form an inner end casing section, and an outer end casing section separated by the twist. The outer end casing section is turned inside out (inverted) to cover at least a part of the inner end casing section and to thereby prevent untwisting. In a preferred embodiment, the end casing portion is twisted at a point indented, from the end of the extended casing portion, 1-2 times the diameter of the stick. The entire end casing portion is preferably inserted within the stick. In another embodiment, the stick is made of regenerated cellulose and an aperture is formed through the twisted closure portion. The specification also describes a method and apparatus for making such an end-closed, shirred synthetic casing stick.
REFERENCES:
patent: 2036687 (1936-04-01), Fisher
patent: 2722714 (1955-11-01), Blizzard et al.
patent: 3419401 (1968-12-01), Matecki
patent: 3454982 (1966-07-01), Arnold
patent: 3882252 (1975-05-01), Winkler
patent: 3942568 (1976-03-01), Stemmler
patent: 3942569 (1976-03-01), Becker et al.
Ishibashi Kengi
Kubo Seiji
Kubo Sekkei, Ltd.
Shepperd John W.
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