Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1975-01-06
1976-10-05
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
34 12, 34 21, 264209, 264343, 426138, 426140, B29D 720, A22C 1300
Patent
active
039845125
ABSTRACT:
This invention relates to an improvement in a process for threading an edible collagen casing through an elongated dryer wherein the casing is inflated with a gas, sealed at an end for maintaining said gas in said casing, and then passed through the dryer. The improvement in the process resides in injecting a gas-forming material selected from the group consisting of a water-immiscible liquid having a boiling point of from about 10.degree. - 70.degree.C. at atmospheric pressure, a solid sublimable at a temperature below about 70.degree.C. at atmospheric pressure, and a solid or liquid which is decomposible at a temperature below about 70.degree.C. at atmospheric pressure into the bore of the casing prior to introducing the casing into the dryer. The elevated temperature maintained in the dryer causes the gas-forming material to vaporize, sublime, react, or decompose to a gas and thereby inflate the casing. The material is added in a proportion sufficient to inflate the casing to a predetermined pressure.
REFERENCES:
patent: 1536700 (1925-05-01), Brucker
patent: 2399259 (1946-04-01), Taylor
patent: 2688766 (1954-09-01), Huckfeldt
patent: 2780512 (1957-02-01), Inoshita
patent: 2925621 (1960-02-01), Parth
patent: 2979777 (1961-04-01), Goldman
patent: 3512997 (1970-05-01), Cohly et al.
Kirk-Othmer Encyclopedia of Chemical Technology, vol. 15, p. 289, 2-1969.
Handbook of Chemistry and Physics, Weast, 1974-1975, vol. 55, c-367(p).
Dettman Mark
Pincelli Richard D.
Dittmann William A.
Kerwin Joseph E.
Shapiro Paul
Tee-Pak Inc.
Thurlow Jeffery R.
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