Package making – Methods – Closing package or filled receptacle
Patent
1995-05-31
1996-10-15
Coan, James F.
Package making
Methods
Closing package or filled receptacle
533742, 533744, 53477, B65B 2902, B65B 5116
Patent
active
055642632
ABSTRACT:
A package for dispensing a substance that imparts a desirable property to a body of water. The dispensing package comprises a water permeable bag of non-woven fabric enclosing a predetermined quantity of particulated product, such as tea or coffee that releases a flavouring substance in steeping liquid. The non-woven fabric has a thermally activated bonding surface permitting to permanently close the bag by peripherally heat-sealing the bag walls to one another. The heat-sealing operation is performed by driving in the wall portions to be joined a multitude of heated projections that rapidly transfer heat to the thermally activated bonding layers in order to quickly effect the seal. The resulting joint area displays a plurality of perforations formed by the heated projections. The invention also extends to a method and apparatus for heat-sealing the dispensing package.
REFERENCES:
patent: 2655979 (1953-10-01), Eaton
patent: 2925171 (1960-02-01), Eaton
patent: 3677861 (1972-07-01), Knauf
patent: 4167092 (1979-09-01), Medwed
patent: 5220769 (1993-06-01), Brown et al.
Boulanger Roger
Metta Flavio
Barr James P.
Coan James F.
Johnson & Johnson Inc.
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