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Self-closing sealable valve bag

a sealable valve and self-closing technology, applied in the field of valve bags, can solve the problems of inability to close, increase the line speed, and inability to fill,

Inactive Publication Date: 2006-02-16
MID AMERICA PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007] In one aspect of the present invention, this is accomplished by providing a valve bag comprising: a bag body; a valve passage formed in the bag body; and a sealable valve sleeve secured within the

Problems solved by technology

The trend in manufacturing processes now, however, particularly with extended valve tube bags, is not to provide one sealing apparatus per packing apparatus, since it requires less capital expense to use only one or two sealing apparatus for a packaging line, and the line speed can also be increased if common sealing apparatus are used for all the packing apparatus.
The difficulty lies in that the filled, but unclosed and unsealed bags must be transported by conveyer to the sealing apparatus location.
Due to the stiffness of the valve tube material, the valve tube tends to remain open somewhat, as the bag is dropped onto the conveyer, leading to unacceptable spillage and dusting.
In addition, the operation of the sealing apparatus may require that the bag be tipped from an upright position, to a position on its side, further leading to the possibility of dusting and spillage.

Method used

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Examples

Experimental program
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Embodiment Construction

[0011]FIG. 1 shows a self-closing sealable valve bag 10 with a top 12 and bottom 14. A self-closing valve 16 is positioned between overlapping flaps 20, 22 (See FIG. 2), typically in the top 12 of the bag 10.

[0012] As shown in FIG. 2, the top 12 of bag 10 is formed by at least partially overlapping inner flap 20 and outer flap 22. A valve passage 18 is formed between the overlapping flaps 20, 22.

[0013] Valve (or valve sleeve) 16 is positioned within the valve passage 18 and is secured (as described below) to the inner and outer flaps 20, 22. Valve 16 consists of a tubular valve liner 24, which is preferably formed from a polymeric material such as polyethylene, with an upper valve support 26 and a lower valve support 28 secured to the valve liner 24. Typically, valve supports 26, 28 are formed from kraft paper and are separate flat pieces of the kraft paper.

[0014] An exterior portion 30 of the valve sleeve 16 extends laterally beyond the end of outer flap 22. The exterior portion...

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PUM

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Abstract

A valve bag comprising: a bag body; a valve passage formed in the bag body; and a sealable valve sleeve secured within the valve passage, an exterior portion of the valve sleeve extending along an adjacent portion of the bag body, the exterior portion of the valve sleeve being unsecured to the adjacent portion of the bag body.

Description

BACKGROUND OF THE INVENTION [0001] This invention relates generally to valve bags, and more particularly to valve sleeves used in valve bags for granular products, such as animal feed, animal supplements, grains, and fertilizers. [0002] Flexible bags such as paper shipping sacks may include sealable sleeves placed in the filling valves. A sealable sleeve provides a convenient means to securely close the flexible bag to prevent the contents of the bag from leaking or sifting out of the bag. Sleeves may be constructed of polyethylene tubing or of paper, for example. [0003] A typical paper sleeve for a paper shipping sack (such as a pasted valve type multi-wall shipping sack) is made from a rectangular sheet of kraft paper that is rolled into a cylindrical shape and secured in the cylindrical shape by overlapping and gluing opposing edges of the sheet of paper to one another, forming a lapped seam. Such a sleeve is typically mounted to an opening, called a valve or filling aperture, lo...

Claims

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Application Information

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IPC IPC(8): B65D30/24B65D30/26
CPCB65D31/142
Inventor JOHNSON, DAVID G.
Owner MID AMERICA PACKAGING