Pouring spout structure for paper carton, paper carton having po

Details Pouring spout structure for paper carton, paper carton having po Pouring spout structure for paper carton, paper carton having po

1995-09-06

1997-08-05

Shoap, Allan N.

Envelopes, wrappers, and paperboard boxes

Paperboard box

With closure for an access opening

220359, 493 87, 493923, B65D 4302

Patent

active

056533837

ABSTRACT:
In order to make the structure of the pouring spout simple by the use of a partial covering film, cover the inner peripheral surface around the pouring hole of the laminate base material properly, and prevent the contents from infiltrating into the inner peripheral surface around the pouring hole of the laminate base material, the present invention comprises the steps of attaching the inner waterproof layer and the partial covering film on the outer waterproof layer at the portion around the pouring hole, inside the pouring hole having penetrated through the laminate base material and the outer waterproof layer, boring a pouring spout on the attached portion, and attaching a tab tape to said partial covering film in a way capable of tearing off, so to cover the pouring spout.

REFERENCES:
patent: 3977591 (1976-08-01), Martensson et al.
patent: 4595116 (1986-06-01), Carlsson
patent: 4781323 (1988-11-01), Elias et al.
patent: 4792069 (1988-12-01), Nantin et al.
patent: 4798296 (1989-01-01), Lagerstedt et al.
patent: 4819839 (1989-04-01), Carlsson et al.
patent: 5452849 (1995-09-01), Schramer et al.

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