Device for forming blisters

Details Device for forming blisters Device for forming blisters

1994-04-20

1996-02-20

Nguyen, Khanh P.

Plastic article or earthenware shaping or treating: apparatus

With means to retard or stop moving element

425388, 188 75, 188 83, 188325, B29C 5110, B29C 5122, B29C 5142

Patent

active

054924650

ABSTRACT:
A method of and a device for forming blisters in which a web material consisting a thermoplastic resin that is supplied to a rotary forming drum is heated and deformed by heat in accordance with the configuration of cavities provided on the rotary forming drum. A predetermined tension is applied forming web material while feeding it. When the rotary forming drum consists of a polygonal drum, each peripheral surface of the drum is formed as a curved surface extending along an arc whose radius is larger than that of the circumscribed circle of the polygon. This invention can be used in a packing device for foods, drugs, etc.

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patent: 3173515 (1965-03-01), Haddock, Jr. et al.
patent: 3268039 (1966-08-01), Skeen et al.
patent: 3555127 (1971-01-01), Messer et al.
patent: 3664915 (1972-05-01), Gore
patent: 3837782 (1974-09-01), Messner et al.
patent: 3954368 (1976-05-01), Kawakari
patent: 4259286 (1981-03-01), Louis et al.
patent: 4576669 (1986-03-01), Caputo
patent: 4750318 (1988-06-01), Matsuzawa

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