Infusion packets and a process for their manufacture

a technology of infusion packets and manufacturing processes, applied in the field of infusion packets, can solve the problems of thin materials prone to tear under the stress applied, materials conventionally used to manufacture infusion packets are often not suitable for thermoforming,
US20150151902A1Inactive Publication Date: 2015-06-04CONOPCO INC D B A UNILEVER
8 Cites 4 Cited by

Patent Information

Authority / Receiving Office
US Β· United States
Patent Type
Applications(United States)
Current Assignee / Owner
CONOPCO INC D B A UNILEVER
Publication Date
2015-06-04
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The present invention relates to a process for the manufacture of infusion packets, the process comprising: β€’ (a) providing a first sheet of thermoplastic material (2) which is porous or non- porous; β€’ (b) thermoforming portions of the first sheet into a three-dimensional shape; β€’ (c) providing a second sheet of material; β€’ (d) dosing an infusible substance into the thermoformed portions of the first sheet or onto the second sheet; β€’ (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; β€’ (f) severing the pockets at the seals to form infusion packets each having a chamber containing the infusible substance,
Need to check novelty before this filing date? Find Prior Art

Description

TECHNICAL FIELD

[0001] The present invention relates to infusion packets. More particularly, the present invention is directed towards the manufacture of infusion packets (such as tea bags) having a three-dimensional shape.BACKGROUND

[0002] In the past, conventional infusion packets (e.g. tea bags) have typically been flat, comprising a single chamber filled with infusible material (e.g. leaf tea, herbal mixtures). Such packets are essentially flat and thus restrict the movement of the infusible material within the packet to substantially two dimensions. As a result, the infusion performance of these infusion packets is limited.

[0003] U.S. Pat. No. 3,549,381 discloses a tea bag comprising tea leaves enclosed in an impervious, flexible, thermoplastic protective film, at least a portion of said film having a regularly spaced embossed pattern on at least one surface which has been drawn sufficiently to develop a preferential weakness in one direction. The tea bag is impervious until it is s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More