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Paperboard block for forming container and tubular structure

A tubular structure, cardboard technology, applied in the direction of containers, rigid containers, transportation and packaging, etc., can solve the problems of weakening the sealing strength and sealing quality of the side seam panel and the first panel, and quality reduction

Inactive Publication Date: 2006-06-07
EVERGREEN PACKAGING INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While solving the aforementioned problem of unfavorable bonding, this method of lowering the temperature can impair the strength and quality of the seal between the side seam panel and the first panel
This loss of quality is unacceptable as the shelf life of liquid cartridges increases

Method used

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  • Paperboard block for forming container and tubular structure
  • Paperboard block for forming container and tubular structure
  • Paperboard block for forming container and tubular structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Attach now figure 1 , a full sheet of paperboard 10 comprising first, second, third and fourth sidewall forming panels, and a fifth side seam forming panel. These side wall panels are labeled 12, 14, 16, 18 and 20 respectively. When the side wall panels are folded and erected, their upper ends form a gable roof and their lower ends form a back cover. The protrusion 24 is of conventional type, with a tapered portion 28 formed during cutting of the left or free edge of the side seam forming panel 20 . Imaginary lines 32 and 34 enclose an imaginary triangular area, which will be described later. The right area 40 of the first panel 12 represents a sealing area, which will also be described later. Both surfaces of the slab are provided with a barrier coating comprising polyethylene, as is conventional. figure 2 The steps of forming a tube from the cardboard blank 10 used to form the gable top container are shown. The paperboard blank is folded to form a tube having a ...

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PUM

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Abstract

According to the practice of this invention, the noted unwanted adhesion between the second panel (14) and the first panel (12) attendant the formation of the sideseam joint is eliminated by providing the second panel with a cutout. That portion which is cut out corresponds in form to the triangular cutout or truncated portion at the tapered end (28) of the sideseam forming fifth panel (20). In this way, when compression of the first panel against the sideseam panel and the first panel occurs, there is no hot and sticky exposed area of the first panel which will adhere to the second panel.

Description

technical field [0001] The present invention relates to a paperboard container commonly used to package liquids such as milk and juice. The container is formed into a gable top liquid package from a single blank of cardboard, the inner and outer forming surfaces of which are usually coated with one or more layers of barrier material, and is cut, scored, erected and filled on automatic machinery. It is known that such containers have a flat bottom and a gabled top or roof which, when opened, is adapted to form a pouring spout. An intermediate step in the manufacture of such containers is the formation of a tubular structure from the blank, followed by formation of the sealed ends and filling with liquid. Background technique [0002] In the process of forming a gable top container from a single slab having a plurality of wall panels forming sequentially arranged panels, there is a step in forming the tube by folding the slab so that the fifth or side seam forming panels over...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D5/06B65D5/42B65D5/40
CPCB65D5/067B65D5/4279B65D5/42
Inventor R·A·小特德福德
Owner EVERGREEN PACKAGING INT