Device for sealing bags or packages in a heat-sealable plastic m

Details Device for sealing bags or packages in a heat-sealable plastic m Device for sealing bags or packages in a heat-sealable plastic m

1996-03-27

1997-09-23

Sipos, John

Package making

Closing packages and filled receptacles

By means adapted to engage outturned seam of package cover

533744, 533745, 53551, 1565831, B65B 5110

Patent

active

056692013

ABSTRACT:
A device for sealing bags or packages in a heat-sealable plastic material containing a predefined portion of product, wherein a tubular strip is longitudinally fed and filled while said sealing device, by welding the opposite edges of said tubular strip, defines a plurality of packages individually containing said predetermined portion of product, said sealing device comprising two welding plates or elements transverse to said strip and opposite one to the other and which are carried by a respective mobile support element. Between each of said welding elements and the respective mobile support at least a first and a second cylinder are provided, which can be actuated by means of a pressurized fluid, said fluid-operable cylinders comprising a respective piston or plunger and a compression chamber integral respectively with the corresponding welding element and with the corresponding support of the respective welding element, each of said pressure chambers having a connection for the pressurized fluid with a plenum element, so as to discharge therein the increase in pressure which is generated inside the chambers of the support cylinders when said welding elements come into contact one with the other.

REFERENCES:
patent: 4506494 (1985-03-01), Shimoyama et al.
patent: 4529472 (1985-07-01), Hsu
patent: 4653986 (1987-03-01), Ashton
patent: 4656818 (1987-04-01), Shimoyama et al.
patent: 4730991 (1988-03-01), Handfield
patent: 4751808 (1988-06-01), Hadden
patent: 4818191 (1989-04-01), Schlake
patent: 5273405 (1993-12-01), Chalmers et al.

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