Simultaneous biaxial stretching machine for thermoplastic film w

Details Simultaneous biaxial stretching machine for thermoplastic film w Simultaneous biaxial stretching machine for thermoplastic film w

1986-02-06

1987-01-20

Mackey, Robert R.

Textiles: cloth finishing

Expanding device for textile webs

Biaxial expansion

B29L 5516

Patent

active

046371036

ABSTRACT:
A simultaneous biaxial stretching machine for thermoplastic film webs, said machine having two transport rails arranged on both borders of the film web, on which transport rails gripping devices for the gripping of the borders of the film web are guided, each coupled with one another by flexible connecting elements and having a roller moving mechanism, the gripping devices being guided at constant small distance in a preheating zone, divergently and at an increasing mutual distance within a stretching zone, and in parallel or convergently within a fixing zone. Each gripping device has an extension arm, oriented rectangularly to the moving direction of the gripping device, the extension arm having a slide, guided therein. Each gripping device, in addition, has a deflection roller for the deflection of the connecting element, coming from the adjacent gripping device. The deflected end of the connecting element is fastened on the slide, and the slide is guided on a guide rail which extends at the side of the transport rail at a variable adjustable distance.

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