Bag with opening means

Details Bag with opening means Bag with opening means

1977-03-23

1978-03-14

Norton, Donald F.

Envelopes, wrappers, and paperboard boxes

Wrapper

Bottle

B65D 3300

Patent

active

040787176

ABSTRACT:
The bag of the present invention is formed by extruding an elongated tube of sheet material and forming the tube into a gusseted tube having in-tucked gusseted walls at the lateral edges thereof. After the formation of the gussets, the tube is expanded by means of an air bubble, and the gussets are forced outwardly so that the tube is formed into a nongusseted tube. The creases which formed the original gusset walls remain in the tube and in cross-section form apexes forming outwardly from the front and rear walls of the tube. These apexes provide means for grasping and opening the upper end of the tube when the bag is being filled.

REFERENCES:
patent: 2189174 (1940-02-01), Hohl
patent: 2286465 (1942-06-01), Clement
patent: 2538920 (1951-01-01), Shumann
patent: 3036756 (1962-05-01), Lieschke
patent: 3113715 (1963-12-01), Pangrac
patent: 3216646 (1965-11-01), Cook
patent: 3283992 (1966-11-01), Hanson
patent: 3411698 (1968-11-01), Reynolds
patent: 3979050 (1976-09-01), Cilia

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