Guide track for a tentering chain

Details Guide track for a tentering chain Guide track for a tentering chain

1985-11-19

1987-02-03

Mackey, Robert R.

Textiles: cloth finishing

Expanding device for textile webs

Spreader

26 91, 26 94, D06C 302

Patent

active

046399844

ABSTRACT:
A guide track for a tentering chain carrying tentering clamps supports the clamps by a number of rollers to form a tentering frame, especially for a film stretching machine. The guide track is an endless track with U-turns in which a single semicircle type of U-turn has been replaced by a U-turn including two partial curved sections each having a smaller radius of curvature and the two curved sections are interconnected by a straight intermediate section. The reversing or looping curved section at the beginning of the reverse run is so constructed that at this location a drive sprocket wheel can mesh with the tentering chain. Thus, the drive sprocket which was a source of contamination for the web is located remote from the web to thereby substantially reduce any possibilities of contaminating the web.

REFERENCES:
patent: 2002096 (1935-05-01), McCann, Jr.
patent: 2755533 (1956-07-01), Miller
patent: 3150433 (1964-09-01), Kampf
patent: 3264704 (1966-08-01), Prottengeier
patent: 3457608 (1969-07-01), Gageur
patent: 4065838 (1978-01-01), Jungpeter et al.
patent: 4435884 (1984-03-01), Bosch

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