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Infusion packets and a process for their manufacture

A brewing and packaging technology, applied in packaging, packaged food, transportation and packaging, etc., can solve problems such as limiting brewing performance and unattractive consumers

Active Publication Date: 2015-04-08
EKATERRA RES & DEV UK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can limit the brewing performance of such packages and is not visually appealing to the consumer
[0006] Therefore, there is still room for improvement in the design and manufacture of 3D infusion packs

Method used

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  • Infusion packets and a process for their manufacture
  • Infusion packets and a process for their manufacture

Examples

Experimental program
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Embodiment Construction

[0021] In a first aspect, the invention relates to a method of manufacturing an infusion pack.

[0022] The method comprises a first step in which a first layer of thermoplastic material is provided. The first layer of thermoplastic material may or may not be porous. In a second step, portions of the layer are thermoformed into a predetermined three-dimensional shape (ie a shape having a length, width and height). The thermoformed portion of the first layer is porous (ie permeable to aqueous liquids).

[0023] A variety of three-dimensional shapes are possible. For example, tetrahedral or hemispherical shapes, etc. are possible. A hemispherical shape is particularly preferred.

[0024] The first layer of thermoplastic material is a polymeric film having at least one embossed surface. In certain embodiments, the embossed film may be embossed on both surfaces. The first layer need not be porous before being thermoformed. During thermoforming, the portion of the first laye...

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Abstract

The present invention relates to a process for the manufacture of infusion packets, the process comprising: . (a) providing a first sheet of thermoplastic material (2) which is porous or non- porous; . (b) thermoforming portions of the first sheet into a three- dimensional shape; . (c) providing a second sheet of material; . (d) dosing an infusible substance into the thermoformed portions of the first sheet or onto the second sheet; . (e) sealing the first and second sheets together to form pockets containing the infusible substance such that each pocket includes at least one thermoformed portion of the first sheet; . (f) severing the pockets at the seals to form infusion packets each having a chamber containing the infusible substance,

Description

technical field [0001] The present invention relates to infusion packaging. More particularly, the invention relates to the manufacture of infusion packages, such as tea bags, having a three-dimensional shape. Background technique [0002] In the past, conventional infusion packages (eg, tea bags) were generally flat, containing a single chamber filled with infusible material (eg, tea leaves, herbal mixes). Such packages are substantially flat and thereby restrict the movement of the infusible material within the package to substantially two dimensions. Consequently, the infusion performance of these infusion packs is limited. [0003] US 3,549,381 discloses a tea bag comprising tea leaves enclosed in an impermeable, flexible, thermoplastic protective film, at least a portion of which film has a pattern of regularly spaced embossments on at least one surface, It has been stretched sufficiently to preferentially weaken in one direction. The tea bag is impermeable until it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C51/04B29C55/16B65B29/02B65B47/04B29C51/00B29C51/42B29K67/00
CPCB29L2031/7122B29C51/262B29K2995/0065B29K2067/003B29K2023/065B29C51/266B29C2791/001B65B47/04B65B29/02B29K2995/0068B29K2067/046B29C51/08B65B29/028B65B47/02B65D85/808
Inventor A·M·伍德沃德
Owner EKATERRA RES & DEV UK LTD