Envelopes – wrappers – and paperboard boxes – File folder or file envelope – Hanging type
Patent
1976-10-22
1978-06-20
Garbe, Stephen P.
Envelopes, wrappers, and paperboard boxes
File folder or file envelope
Hanging type
B65D 3114
Patent
active
040957365
ABSTRACT:
A bag having an end closure through which the bag is filled after sealing of the closure. A valve sleeve is provided in the end closure through which a filling tube may be inserted for filling the bag. After completion of the filling operation, the valve sleeve is tightly flattened within the closure, so that the material filling the bag does not leak through the sleeve. The valve sleeve includes a flexible tubing secured to a reinforcing strip. The reinforcing strip is secured to the end closure along substantially its entire length when the closure is sealed and prevents the flexible tubing from crimping, so that it may be tightly flattened. A slit is provided in the valve sleeve from its inner end to about its middle along an axis parallel to the axis of insertion of the filling tube into the sleeve. The means for securing the reinforcing strip to the end closure covers substantially the closure contacting face of the strip, except in the area of the slit.
REFERENCES:
patent: RE23230 (1950-05-01), Lee
patent: 2189847 (1940-02-01), Verwys
patent: 2528419 (1950-10-01), Burroughs
patent: 2651451 (1953-09-01), Bennett
patent: 3065899 (1962-11-01), Means et al.
patent: 3130897 (1964-04-01), Poklukar et al.
patent: 3187984 (1965-06-01), Hollis et al.
patent: 3261267 (1966-07-01), Becker
patent: 3482762 (1969-12-01), Jones
patent: 3648922 (1972-03-01), Gebo
patent: 3894682 (1975-07-01), Harmsen
Baxter Robert Olin
Rothschild, III Arthur Louis
Garbe Stephen P.
International Paper Company
Schapira Ronald A.
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