Bag for flowable materials

a flowable material and bag technology, applied in the direction of flexible container closure, closure using stoppers, liquid handling, etc., can solve the problems of inability to fully engage, the top of the bag is often not properly refolded, and the integrity of the closure seal is compromised

Inactive Publication Date: 2004-01-22
LIN PAC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the unfilled top portion of the bag is generally maintained in an upright orientation solely as a result of resistance of the previously folded bag material to bending, and is thus presented to the refolding blades at the closure station, the unfolded top of the bag may flex under its own weight or due to air movement between the filling station and the closure station so that it cannot be engaged properly or completely by the refolding blades.
As a result, the top of the bag is often not properly refolded and the integrity of the closure seal is compromised.
Also, the aesthetic appearance of the package represented by the filled and sealed bag is degraded when an uneven refolding of the gussets occurs.

Method used

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  • Bag for flowable materials
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  • Bag for flowable materials

Examples

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Embodiment Construction

[0017] Reference will now be made in detail to the present embodiments of the invention, examples of which is illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to designate the same or like parts.

[0018] In accordance with the present invention, a bag is provided with a front panel, a rear panel coextensive with the front panel, and a pair of folded gussets. Each of the gussets has front and rear gusset layers joined at a central crease and a pair of outer gusset edges joined continuously along and to the side edges of the front and rear panels.

[0019] In the illustrated embodiments, as shown in FIG. 1, the bag, generally designated by the reference number 10, is formed by a folded tubular web to include a front panel 12 having top and bottom edges 14 and 16 and side edges 18, thus defining a front panel width and height. A rear panel 20 having top and bottom edges 22 and 24 and side edges 26 is coextensive wit...

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PUM

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Abstract

A bag for containing flowable materials, having a front panel, a rear panel coextensive with the front panel, and a pair of folded gussets. Each of the gussets has front and rear gusset layers joined at a central crease and a pair of outer gusset edges joined continuously along and to side edges of the front and rear panels. The bag has a bottom closure and at its initially open top portion, the front and rear gusset layers are joined to the respective front and rear panels along lines spaced from or adjacent to the joined side edges of the respective front and rear gusset layers and front and rear panels, to provide stiffened, fastened layer corner portions in the top portion of the open bag.

Description

[0001] 1. Field of the Invention[0002] This invention relates to bags for flowable materials, and, more particularly to deep gusseted bags for packaging granular, powdered, liquefied, and other such materials.[0003] 2. Description of the Related Art[0004] Packaging procedures for various types of granular or powder materials currently in use involve the use of deep gusseted bags pre-formed of various plastic films and other film or sheet materials. Individual bags are seized and the top ends thereof are drawn up over a material discharge chute positioned above a conveyor belt or other support at a filling station. The bag is filled with a metered amount of fill material and then tamped against the conveyor belt or support so that the weight of the fill material forms the bottom of the bag and product into a flat, squared configuration. The filled bag is released from the discharge chute and advanced on the conveyor belt from the fill station to a top closure station at which the top...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B65D30/18B65D30/20B65D33/02
CPCB65D31/08B65D33/02B65D31/10
Inventor COOK, GAVIN
Owner LIN PAC INC
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