Method and apparatus for producing tubular plastic films

Details Method and apparatus for producing tubular plastic films Method and apparatus for producing tubular plastic films

1979-12-19

1981-11-10

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

137224, 264 403, 425 72R, 425140, 4253261, B29D 2304, B29F 300

Patent

active

042997933

ABSTRACT:
An apparatus for producing tubular plastic films having extremely small variation of flat width in stabilized manner is provided. Said apparatus comprises a blower, a valve for controlling the amount of air, an air reservoir, a connecting pipe for connecting these blower, valve and air reservoir and another connecting pipe which connects said reservoir to the inside of a bubble formed on the tip end of a mold fixed to the outlet of an extruder through said mold to feed or discharge the air into the inside of said bubble continuously in a non-step manner, thereby to keep the inside pressure of said bubble uniform.

REFERENCES:
patent: 2668323 (1954-02-01), Johnson
patent: 3841816 (1974-10-01), Herz
patent: 3888961 (1975-06-01), Schonewald
patent: 3947170 (1976-03-01), Zimmermann
patent: 4140460 (1979-02-01), Carlsen
patent: 4189288 (1980-02-01), Halter

Affiliated with

Also associated with

Rating

Method and apparatus for producing tubular plastic films 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 producing tubular plastic films, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for producing tubular plastic films will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2362251