Manufacturing clear plastic lids

Details Manufacturing clear plastic lids Manufacturing clear plastic lids

1974-08-15

1976-02-03

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Diverse distinct type shaping means

Shaping orifice and either a downstream preform reshaping...

425 72R, B29D 714, B29D 726, B29D 2304

Patent

active

039362655

ABSTRACT:
Continuous thermoplastic sheeting is manufactured by extruding thermoplastic material from a circular die to form seamless thin walled tubing. This hot, seamless tube is pressed together between a water cooled draw roll and a water cooled elastomerically coated roll to form sheet material which is transparent and without the speckled finish caused by included air.

REFERENCES:
patent: 3002430 (1961-10-01), Voigt et al.
patent: 3008186 (1961-11-01), Voigt
patent: 3176347 (1965-04-01), Shaul
patent: 3320340 (1967-05-01), Luca
patent: 3576051 (1971-04-01), Click et al.

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