Method for sealing an emptying opening and an arrangement for th

Details Method for sealing an emptying opening and an arrangement for th Method for sealing an emptying opening and an arrangement for th

1984-12-12

1986-04-29

Dawson, Robert A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

53329, 53478, 1562744, 1563084, 1563797, 1563803, 156475, 156497, 220270, 220359, 493103, B65B 728, B65D 1750

Patent

active

045854980

ABSTRACT:
A packing container of the non-returnable type is frequently manufactured from laminated material which comprises a central carrier layer of paper with thermoplastic layers applied to both sides. As an opening arrangement, a pre-punched pouring opening is used which is covered on the one hand by a tear-off cover strip located outside the packing container and, on the other hand, by an inner protective strip. A method for sealing an emptying opening in accordance with the invention ensures that a part of the inner protective strip corresponding to the shape and size of the pouring opening accompanies the cover strip since the strips are heat-sealed to each other at the same time as they are pressed against each other by means of pressure fluid. An arrangement for carrying out the method comprises a heating device with a heatable zone and an outlet for pressure fluid.

REFERENCES:
patent: 3361611 (1968-01-01), Stark
patent: 3549440 (1970-12-01), Adcock et al.
patent: 4266993 (1981-05-01), Olsen
patent: 4373978 (1983-02-01), Patterson

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