Method of making seal for flexible container

Details Method of making seal for flexible container Method of making seal for flexible container

1979-10-29

1981-10-13

Coan, James F.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

493929, B31B 184

Patent

active

042945747

ABSTRACT:
Sealed, flexible containers may be manufactured with a sterile, openable seal member by inserting part of a thermoplastic tube between a seal in such a manner as to permit the tube to communicate across the seal. In manufacture, the outer end of the tube may be enclosed with a thermoplastic pocket member having open inner and outer ends. A mandrel is inserted through the outer end of the pocket member and the tube. The thermoplastic sheet members, tube, and inner end of the pocket member are sealed together. Following this, the mandrel is withdrawn through the outer end of the pocket member which outer end is then also sealed, for a sterile seal, if desired. A novel design for a container seal is also disclosed.

REFERENCES:
patent: 2894510 (1959-07-01), Bellamy, Jr.
patent: 2940444 (1960-06-01), Beall
patent: 3211144 (1965-10-01), Nehring
patent: 3327709 (1967-06-01), Nehring et al.
patent: 3343541 (1967-09-01), Bellamy, Jr.
patent: 3788374 (1974-01-01), Saijo
patent: 4183434 (1980-01-01), Watt

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