Rotary film sealing and severing head for thermoplastics

Details Rotary film sealing and severing head for thermoplastics Rotary film sealing and severing head for thermoplastics

1989-01-04

1990-03-20

Culver, Horace M.

Package making

Closing packages and filled receptacles

By means adapted to engage outturned seam of package cover

53550, 53552, 156494, 156496, 156498, 156582, 1565833, B65B 5126, B65B 5130, B65B 5116

Patent

active

049090160

ABSTRACT:
A rotary film sealing and severing device for use with thermoplastic film for forming packages. The device includes a rotating anvil assembly and a counter-rotating film cutting assembly having a heated sealing and cutting knife. First and second liquid cooled clamping bars on either side of the knife hold the layers of film together while the film is being sealed and cut. Cooling the clamping bars prevents the film from adhering to the clamps and causes the layers of film to quickly fuse together and allows high speed operation by preventing separation of layers of film due to slow cooling.

REFERENCES:
patent: 3050916 (1962-08-01), Gausman et al.
patent: 3057129 (1962-10-01), Meissner
patent: 3438173 (1969-04-01), Omori
patent: 3522135 (1970-07-01), Page
patent: 3850780 (1974-11-01), Crawford et al.
patent: 4048003 (1977-09-01), Bolli
patent: 4341057 (1982-07-01), Limousin
patent: 4512138 (1985-04-01), Greenawalt
patent: 4630429 (1986-12-01), Christine
patent: 4663917 (1987-05-01), Taylor et al.
patent: 4750313 (1988-06-01), Kammler et al.

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