Method for forming a rolled rim in a fabricated thermoplastic co

Details Method for forming a rolled rim in a fabricated thermoplastic co Method for forming a rolled rim in a fabricated thermoplastic co

1989-04-14

1991-06-25

Schmidt, Frederick R.

Manufacturing container or tube from paper; or other manufacturi

Container making

Rigid container

264322, 425393, B29C 5712

Patent

active

050263382

ABSTRACT:
A device for forming a rolled rim at the unrimmed mouth of the body of a container having a body which is fabricated from a sheet of an expanded thermoplastic material, the device including a first member with a first annular rim-forming surface, and a second member which is reciprocable relative to the first member. The second member has a second annular rim-forming surface which forms a generally closed rim-forming chamber with the first annular rim-forming surface when the second member is in a first position relative to the first member, the second member being reciprocable to a second position in which the first annular surface and the second annular surface are separated to permit the withdrawal of a container with a rolled rim at the mouth from the first member. The device further includes a transfer mechanism for inserting a container with an unrimmed mouth over a frustoconical portion of the first member to position such container to have a rim rolled in the mouth thereof in such rim-forming chamber and to withdraw a container with a rolled rim at the mouth from the first member. The rim-forming chamber is heated and there is no relative rotation between the rim-forming chamber and the container during the forming of a rolled rim in the container.

REFERENCES:
patent: 2272920 (1942-02-01), Merta
patent: 3065677 (1962-11-01), Loeser
patent: 3854583 (1974-12-01), Amberg et al.
patent: 4053346 (1977-10-01), Amberg et al.
patent: 4072549 (1978-02-01), Amberg et al.
patent: 4281979 (1981-08-01), Doherty et al.

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