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| Number | Title | Issue Date |
| 7311442 | Air valve for a fillable poly bag An air valve for a poly bag that permits the escape of air from the bag as it is filled by a filling tube. The air valve consists of a plurality of slitted openings in one top corner of the bag and a valve flap mounted in the poly bag near the slitted openings that ... | 12/25/2007 |
| 6595688 | Sealable valve bag and method for making a sealable valve bag The valve bag includes a bag body having a valve end portion, the valve end portion constructed to form a filling passage in which a valve sleeve is inserted. The valve sleeve has a first end extending into the interior of the valve bag and a second end e... | 07/22/2003 |
| 6499879 | Sealable valve bag and method for making a sealable valve bag The valve bag includes a bag body having a valve end portion, the valve end portion constructed to form a filling passage in which a valve sleeve is inserted. The valve sleeve has a first end extending into the interior of the valve bag and a second end e... | 12/31/2002 |
| 6092930 | Self-closing sealable valve bag 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.... | 07/25/2000 |
| 5806982 | Self-closing sealable valve bag 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.... | 09/15/1998 |
| 5516210 | Self-closing sealable valve bag 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.... | 05/14/1996 |
| 4759640 | Rose-bottom or block-bottom valve bag A bag of foldable material has an end closure closing off one end of the bag and a filling valve tube device extends into the end closure at a corner of the bag, the filling valve tube device has an inner end disposed within the interior of the bag and ha... | 07/26/1988 |
| 4708705 | Reinforced plastic bag The invention provides a method of forming single or multi-wall plastic tubing and more particularly, in forming single or multi-wall plastic bags wherein the seal area is strengthened by utilizing a plurality of extruded layers of adhesive material in th... | 11/24/1987 |
| 4637062 | Plastic bag assembly including a conduit member There is disclosed a bag assembly comprised of a tubularly-shaped bag preform formed of a plastic material defining a top closure portion and a bottom closure portion and provided with an adhesive layer peripherally-disposed about the tubularly-shaped bag... | 01/13/1987 |
| 4604757 | Paper sack with a valve for packaging pulverized or granular materials A valve sack having a collapsible filling valve. A flattened tubular blank is formed by folding a second flap over a first flap to form a longitudinal seam. A valve is placed between the flaps transverse to the seam to provide communication with the inter... | 08/05/1986 |
| 4524458 | Moisture responsive stiffening members for flexible containers Flexible plastic bags used for the bulk storage and dispensing of fluids are often blocked from dispensing all the contents and/or entrap part of the contents in folds of the plastic as they shrink during dispensing. The invention is for a tongue or dip t... | 06/18/1985 |
| 4391404 | Sleeve valve for flexible bags An improved sleeve valve for use in a flexible paper bag which is adapted to package granular products. The sleeve is mounted in the open mouth located in a corner of the flexible bag and adapted to receive the filler spout of a product-dispensing mechani... | 07/05/1983 |
| 4095736 | Bag closure having valve sleeve 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 ... | 06/20/1978 |
| 4049191 | Block bottom valve bag A block bottom valve bag comprises an elongated bag tube having opposite ends. One end of the bag is folded to form a block bottom closure comprising first and second side flaps folded toward one another in overlapping relationship and adhered to one anot... | 09/20/1977 |
