Full withdrawal container and method

Details Full withdrawal container and method Full withdrawal container and method

A - Human Necessities

61

J

A61J 1/00 (2006.01) B29C 49/76 (2006.01) B65D 17/00 (2006.01) B29C 57/00 (2006.01)

Patent

CA 2108329

A container having a neck with a non-tapered cylindrical upper drain portion, and a frictional interference fit collar type gripper for the withdrawal member is disclosed which results in tight interference fit. Also total effective withdrawal of the contents of the container is promoted by providing a ring like stop or seat at the bottom of the neck. The construction also will accommodate flaws and defects in the manufacture of the withdrawal member or the drain portion resulting from scratches which will otherwise permit leakage upon withdrawal of the contents. The method of the present invention is directed to manufacturing the container by which the mandrel for insertion in the neck has a lower end portion providing a seating ring, and an upper portion defining the interior portion, with an interference collar protruding inwardly in a portion spaced from the lower end portion. The radius and draft angle permits the mandrel to be withdrawn from the molded plastic product without deforming or damaging the same, but only after the neck of the container including an internal interference fit collar has been shaped.

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