Perforated easy opening pouch

Inactive Publication Date: 2009-09-24
THE PROCTER & GAMBNE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]It has now been found that the invention can balance easy opening via a tearing line combined with profiled sealing while also maintaining the robustness and strength of a complete seal. Also described herein is a method of and a sealing jaw for sealing and creating the easy opening portion si

Problems solved by technology

However it is always a challenge to balance the need for an easy opening functionality (e.g., tear lines, perforations, score lines, etc.) with pouch sturdiness and strength against bursting and leakage.
Many packages such as, for example, laundry detergents do not have tearing lines because during shipment such pouches are often dropped, compressed, etc. which could cause unacceptable leakage.
Instead, merely a notch or other slit is made to start the tearing, but no cost-effective technology has been found which can also control the propagation of the tear.
Specifically, while such pre-formed pouches are useful for smaller volumes, they become more difficu

Method used

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Examples

Experimental program
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Example

EXAMPLE 1

[0047]Pouches according to FIG. 2, FIG. 4, and FIG. 7, are formed on an autopacking machine from a sheet using the sealing jaw of FIGS. 5-6. The autopacking machine creates all seals by heating to create thermal bonding between the separate sheets. The sheet is a three layer laminate of the film materials polyethylene terepthalate, a metallic film (like MYLAR®), and polyethylene. The sheet is provided on a roll which feeds into the autopacking machine and is stretched onto an area where the tube is formed by sealing a line in the machine direction. The tube has a leading edge which is sealed to form a first seal using the sealing jaws according to FIGS. 5-6. A predetermined weight (2 kg) of laundry detergent is filled into and flows down the tube and the tube is sealed using the sealing jaws of FIGS. 5-6 to form a filled pillow bag containing 2 kg of granular laundry detergent. The process then repeats itself for the next pouch.

[0048]The pouch formed above substantially cor...

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Abstract

A perforated large-size easy opening pouch is formed from a single sheet containing at least one layer of a film material, and the sheet forms a volume. The pouch also contains a seal containing a perforation. The perforation is completely surrounded by the seal. When a tear is initiated along the perforation, the tear propagates to a non-sealed portion of the pouch. A sealing jaw and a method for forming such a pouch is also described.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of U.S. Provisional Application No. 61 / 069,990 filed on Mar. 19, 2008.FIELD OF THE INVENTION[0002]The present invention relates to pouches. Specifically, the present invention relates to pouches which are easy to tear open.BACKGROUND OF THE INVENTION[0003]Pouches are typically formed of a laminate or a film and may be used for holding many types of items such as food, shampoos, detergents, medicines, etc. In order to make them easier to use, notches, laser cut score lines, and perforations are standard in the packaging industry. However it is always a challenge to balance the need for an easy opening functionality (e.g., tear lines, perforations, score lines, etc.) with pouch sturdiness and strength against bursting and leakage. Many packages such as, for example, laundry detergents do not have tearing lines because during shipment such pouches are often dropped, compressed, etc. which could cause unacc...

Claims

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Application Information

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IPC IPC(8): B65D65/28
CPCB31B2219/14B31B2219/603B65D75/5816B65D75/12B31B2219/6038B31B70/14B31B70/64B31B70/642
Inventor BHATTACHARJEE, GAUTAMZHANG, LONGFEI
Owner THE PROCTER & GAMBNE CO
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