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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 |
| 6883964 | Multiwall paper bag A multiwall paper bag for bulk material, especially particulate or powdered material, has an inner ply of a high performance kraft paper, an intermediate layer or ply of a thin polyethylene secured to the outer surface of the inner ply, and an outer ply of high perf... | 04/26/2005 |
| 6723408 | Resealable envelope A resealable envelope comprising a flexible plastic back sheet, a backing adhesive applied on a back surface of the flexible plastic back sheet to attach the envelope to a package, a flexible plastic front sheet attached to the back sheet at their respective side ed... | 04/20/2004 |
| 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 |
| 5967664 | Sift proof valve bag A valved bag is provided, having first and second end portions, and at least one in-folded flap member and at least one outer flap member affixed to at least one of the first and second end portions. A cover member is positioned and affixed to the in-fold... | 10/19/1999 |
| 5469966 | Inflatable package with valve There is described an improved inflatable package comprising outer deformable walls defining at least one fluid-tight chamber therebetween, and a one-way valve disposed within the chamber, to be in fluid communication therewith, the valve permitting the i... | 11/28/1995 |
| 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 |
| 4453637 | Double compartment valve bag A closed bag containing two independent compartments has a single opening for filling both compartments simultaneously, the compartments being separable from each other so they can be moved independently.... | 06/12/1984 |
| 4453270 | Pasted valve stepped end bag The pasted valve, stepped end bag of the present invention is rendered substantially sift resistant as a result of, (1) the particular stepped end pattern chosen for the bag; (2) the placement of the valve sleeve at one end of the bag; and, (3) the arrang... | 06/05/1984 |
