Flexible bags – With closure – Self-closing type
Patent
1998-03-31
2000-07-25
Pascua, Jes F.
Flexible bags
With closure
Self-closing type
383 44, 383 46, B65D 3026
Patent
active
060929308
ABSTRACT:
A valve bag is provided having a self-closing feature to preclude sifting losses after filling, but before the bag is fully sealed, while enabling the facilitated final secure closure of the bag.
REFERENCES:
patent: 2147970 (1939-02-01), Du Bois
patent: 3130897 (1964-04-01), Poklukar et al.
patent: 3191850 (1965-06-01), Niemeyer
patent: 3235169 (1966-02-01), Gennerich et al.
patent: 3261267 (1966-07-01), Becker
patent: 3295738 (1967-01-01), Keuchenius et al.
patent: 4049191 (1977-09-01), Stearley
patent: 4166482 (1979-09-01), Sanders
patent: 4367620 (1983-01-01), Fox
patent: 4382538 (1983-05-01), Wilharm
patent: 4391404 (1983-07-01), Welter
patent: 4453270 (1984-06-01), Donini et al.
patent: 4759640 (1988-07-01), Groner
patent: 5098201 (1992-03-01), Jacobi
patent: 5516210 (1996-05-01), Kelley et al.
patent: 5806982 (1998-09-01), Kelley et al.
Page from Windmoeller and Hollscher catalog (unnumbered) identifying polyethylene tubular valve, purportedly from 1974.
Photo No. 1--Propped-up photo of a polyethylene tubular valve, of the type purportedly manfactured and sold at least as early as May 9, 1993.
Photo No. 2--Photo of a polyethylene "double trap" valve, of the type purportedly manufactured and sold at least as early as May 9, 1993.
Photo No. 3 --Photo of a sealable paper valve tube, having an inner coating of activatable adhesive of the type purportedly manufactured and sold at least as early as May 9, 1993.
Photo No. 4--Propped-up photo of a polyethylene tubular valve of the type purportedly manufactured and sold by Bemis Company Inc., of Cordova, Tennessee, at least as early as May 9, 1993.
Photo Nos. 5 and 6--Photos of a valve structure incorporating the polyethylene tubular valve of Photo No 4, to which a rectangular piece of bleached (white) kraft paper has been adhesively affixed. This structure was purportedly manufactured and sold at least as early as May 9, 1993.
Photos Nos. 7-11--Series of photos of a bag incorporating the valve structure of Photos Nos. 5 and 6. This bag-valve structure was purportedly manufactured and sold by Union Camp (now International Paper) at least as early as May 9, 1993.
Photo No. 12--Photo of a bag incorporating the valve structure of Photo Nos. 5 and 6. This type of valve bag structure was purportedly manufactured and sold at least as early as May 9, 1993.
Drawing 1--Drawing of the valve tube structure of Photos Nos. 5 and 6, shown on a bag, as in the top view of Photo No. 7.
Abar Michael D.
Avila Michael R.
Belser Mark D.
Fuller John P.
Giles Don G.
Pascua Jes F.
Stone Container Corporation
LandOfFree
Self-closing sealable valve bag does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Self-closing sealable valve bag, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-closing sealable valve bag will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1331977