Method and apparatus for making biaxially stretched tubular film

Details Method and apparatus for making biaxially stretched tubular film Method and apparatus for making biaxially stretched tubular film

1979-12-19

1982-07-27

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

264 37, 264567, 264568, 264569, 2642893, 425 74, 4253261, 425384, 425388, 425445, B29D 724

Patent

active

043417299

ABSTRACT:
An apparatus for making biaxially stretched tubular films of thermoplastic synthetic resin which permits operation in a stabilized manner and economically by using the hot air used in stretching a bubble again in heating a raw film. In said apparatus, a suction ring is provided in the section where a heated raw film is inflated by the gas filled therein under pressure, and the diameter of the resulting stretched bubble reaches its maximum diameter. The suction ring sucks the air used for heating the stretching part simultaneously with the air used for cooling it after stretching to attain a thermal interception effect between the stretching part and the cooling part after stretching. Air flow around the stretching bubble is made uniform.

REFERENCES:
patent: 3325575 (1967-06-01), Last
patent: 3363035 (1968-01-01), Niiho et al.
patent: 3456044 (1969-07-01), Pahlke
patent: 3555603 (1971-01-01), Haley
patent: 3904342 (1975-09-01), Sato et al.
patent: 3985849 (1976-10-01), Notomi et al.

Affiliated with

Also associated with

Rating

Method and apparatus for making biaxially stretched tubular film does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for making biaxially stretched tubular film, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for making biaxially stretched tubular film will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2024706