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Container with stackable base

Inactive Publication Date: 2003-12-04
GRAHAM PACKAGING CO LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008] It is another object of the present invention to provide a method for improving stackability of a plurality of containers.

Problems solved by technology

Known containers can be stacked but stability of the stacked containers is often inadequate because resistance to being tilted is poor.
However, design restrictions imposed to allow for heat-processing simultaneously presents particular challenges for achieving useful modifications.
Without structural support, heat processing can cause plastic containers to distort in a commercially-unacceptable manner.
The presence of a standing ring and a push-up in the heat processable container may reduce the container's stackability because there is not a large surface area in the base of the container to make contact with another container.
In such an arrangement, although the containers are stackable, they are not likely to be capable of being tilted.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0048] The significantly improved resistance to tilting of a stack of containers according to the present invention was demonstrated in the following tests conducted on containers, which were bottles fitted with two piece screw caps. The containers were equivalent except that the "control containers" did not have a base according to the present invention defined in their bottoms. The "stackable containers" according to the invention had bases as illustrated in FIGS. 2-5 and 6A.

[0049] A two-piece 63 mm ribbed closure was employed which included a plastic ring having a peripheral rim with a raised annular section with a 65.9 mm outer diameter and a 54 mm inner diameter, and a metal disk positioned within and retained by the ring. The raised annular section had a radial cross-sectional shape, which was generally rectangular and extended vertically above the plane of the metal disk by about 2 mm. The width of the longer leg of the rectangle was about 6 mm. Containers according to the in...

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PUM

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Abstract

A stackable, heat processable, blow molded, plastic container is disclosed. The container has a body that has top and bottom ends and a tubular sidewall. The container also has a dome with a finish having an opening. The dome is connected to the top end of the body and the finish is adapted to engage a first closure. Finally, the container has a base connected to the bottom end of the body. The base is contoured to engage at least a portion of a protrusion on a second closure, thus causing the two containers to be stackable.

Description

[0001] 1. Field of the Invention[0002] This invention relates to a container having a stackable base and a complementary closure. More particularly, the invention is a base for a heat processable plastic container having a stacking ring to engage a complementary protrusion on a closure of a second container.[0003] 2. Description of the Related Art[0004] Known containers include bottles, jars, tubs and pails. Closures for such containers include screw caps and press-fit lids, and may be one structural piece or made of a plurality of structural component pieces, exclusive of sealing rings and / or liners. Such closures may include a raised peripheral ring around the top to provide improved strength. Ribbed closures are known and have a raised peripheral ring with vertical striations on the skirt to facilitate gripping by a user. Ribbed closures may be made as one piece structures or structures having a plurality of pieces. Closures may include protective liners and sealing means includi...

Claims

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Application Information

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IPC IPC(8): B65D1/02B65D21/02B65D79/00
CPCB65D1/0276B65D79/005B65D21/0231B65D21/0222B65D79/0084
Inventor TRUDE, GREGORY ALLAN
Owner GRAHAM PACKAGING CO LP
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