Package for dispensing a fluid treating substance and method and

Details Package for dispensing a fluid treating substance and method and Package for dispensing a fluid treating substance and method and

1993-09-24

1995-10-10

Coan, James F.

Package making

Closing packages and filled receptacles

By means adapted to engage outturned seam of package cover

533744, 53546, B65B 2902, B65B 5116

Patent

active

054560551

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: 2083617 (1937-06-01), Salfisberg
patent: 2424103 (1947-07-01), Lobley et al.
patent: 2730852 (1956-01-01), Clark
patent: 3383269 (1968-05-01), Kopp
patent: 3657856 (1972-04-01), Planner
patent: 3677861 (1972-07-01), Knauf
patent: 3813848 (1974-06-01), Romagnoli
patent: 3982374 (1976-09-01), Schaefer
patent: 4045946 (1977-09-01), Schaefer
patent: 4605123 (1986-08-01), Goodrum et al.

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