Sealable longitudinal sleeveless valve bag

Details Sealable longitudinal sleeveless valve bag Sealable longitudinal sleeveless valve bag

1977-07-25

1979-03-06

Garbe, Stephen P.

Envelopes, wrappers, and paperboard boxes

File folder or file envelope

Hanging type

93 35R, B65D 3114, B31B 4904

Patent

active

041426673

ABSTRACT:
A bag of tubular form closed at one end and partially closed at the other end by a first rear wall portion being folded over and sealed to a front wall. The opening between a second rear wall portion and opposed front wall forms the valve which is sealed after filling by folding the longitudinally extending second rear wall portion over and sealing it to the opposed front wall using the folded first rear wall portion as a reference. Adjacent lateral termination of the plural ply rear wall portions are oppositely stepped so as to overlap when sealed to the front wall.

REFERENCES:
patent: 1070790 (1913-08-01), Falk
patent: 2093977 (1937-09-01), Farmer
patent: 2162285 (1939-06-01), Scott
patent: 2202879 (1940-06-01), Wentz
patent: 2219198 (1940-10-01), Reineman
patent: 2226943 (1940-12-01), Poppe
patent: 2555526 (1951-06-01), Zinn, Jr.
patent: 2639028 (1953-05-01), Stern
patent: 2993630 (1961-07-01), Cox et al.
patent: 3009627 (1961-11-01), Ottinger
patent: 4008850 (1977-02-01), Goodrich

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