Heating and sealing of thermoplastic surfaces

Details Heating and sealing of thermoplastic surfaces Heating and sealing of thermoplastic surfaces

1995-08-31

1997-10-21

Moon, Daniel

Package making

Methods

Closing package or filled receptacle

53565, 156499, B65B 5110

Patent

active

056783914

ABSTRACT:
A hollow heating head for insertion into an open, spouted, top end closure of a carton comprises an interior chamber with slot-form outlets for hot air supplied to the chamber. The slots include a U-shaped, narrow slot, or its equivalent, extending generally horizontally around two lateral vertical walls and an end vertical wall of the head. Each limb of the U-shape includes horizontal, upper and lower sections and a vertical intermediate section. The base of the U-shape is adjacent the lower sections, is at substantially the same level as the lower sections and is of a shallow V-shape in a vertical plane. The slots also include several vertically extending slots above each of the base and the lower sections of the U-shaped slot.

REFERENCES:
patent: 3084489 (1963-04-01), Seefluth
patent: 3405505 (1968-10-01), Mistarz
patent: 3825408 (1974-07-01), Farfaglia et al.
patent: 4526648 (1985-07-01), Tochtermann
patent: 4838009 (1989-06-01), Connor et al.
patent: 5230204 (1993-07-01), Mall et al.

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