Blowhead for tubular film

Details Blowhead for tubular film Blowhead for tubular film

1974-04-17

1976-06-29

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Shaping orifice and downstream work contacting gaseous...

264 98, 4251331, 4251335, 425326R, B29D 702

Patent

active

039663779

ABSTRACT:
In a blow-head for producing tubular film from thermoplastic molten material and comprising a housing with a central supply conduit for the molten material, distributing passages radiating from the supply conduit to a respective distributing helix of an insert member, and means for internally cooling the blown film, said cooling means comprising concentric air inlet and outlet passages extending axially of the housing and each connected to at least one inlet tube and one outlet tube, respectively, the said tubes being disposed between adjacent said radiating distributing passages and extending to the exterior of the housing, provision is made for forming the film of at least two layers having different properties by making the said insert member tubular and providing in it at least one coaxial further insert formed with further distributing helices each of which is fed with further molten material from a further supply conduit through further distributing passages, the said insert member terminating in an annular flow divider adjacent an annular outlet nozzle in the housing for all the molten material.

REFERENCES:
patent: 3647339 (1972-03-01), Upmeier
patent: 3649143 (1972-03-01), Papesh et al.
patent: 3694292 (1972-09-01), Schippers et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1274234