Package making – Methods – With contents treating
Patent
1994-07-25
1997-05-27
Johnson, Linda
Package making
Methods
With contents treating
53453, 53140, B65B 3100, B65B 4700
Patent
active
056321333
ABSTRACT:
The novel method of the present invention is directed to the continuous formation of a multi-layer, laminated package by in-line thermofusing of several separate films. A first roll of the first film having defined first properties is provided, along with at least a second roll of a second film having defined second properties. A tie layer may be disposed, as either a separate film disposed between, or co-extruded upon contacting surface of one of the first or second films. A tacking station is provided for continuous disposition of the first and second films at the tacking station. At the tacking station, where the first film is tacked to at least the second film. Such tacking is carried out by contacting the respective films and by applying a first pressure to at least a portion thereof to provide a continuous strip of pre-laminated film. The continuous strip of pre-laminated joint film is subjected to sufficient heat and a second pressure sufficient to laminate and to bond together (i.e., thermofuse) the films which have been previously tacked together to form the pre-laminated joint film. In-line, the continuous strip of pre-laminated joint film is subjected to the application of heat thereto sufficient for thermoforming. The heated portion of the pre-laminated joint film is thermoformed into a package component.
REFERENCES:
patent: 3558408 (1971-01-01), Hamilton et al.
patent: 3648834 (1972-03-01), Gifford et al.
patent: 3661322 (1972-05-01), Norman
patent: 3765976 (1973-10-01), Nasica
patent: 4684025 (1987-08-01), Copland et al.
patent: 4685274 (1987-08-01), Garwood
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