Web tension control system

Details Web tension control system Web tension control system

1996-01-02

1998-03-24

Cuda, Irene

Roll or roller

Rotatable relative to supporting shaft

492 22, 492 45, B23P 1500

Patent

active

057306931

ABSTRACT:
An improved web tension control system including a shaft and a hollow cylindrical roller mounted on the shaft for rotation about the shaft and for universal pivoting movement relative to the shaft that tends to compensate for variations in the tension of a moving web or substrate passing over the hollow cylindrical roller. The hollow cylindrical roller is mounted on the shaft by a spherical bearing assembly that permits universal pivoting movement of the hollow cylindrical roller relative to the shaft and a roller bearing assembly positioned between the outer surface of the spherical bearing assembly and the inner cylindrical surface of the hollow cylindrical roller to permit free relative rotation of the roller about the shaft. In an alternate embodiment, slots may be formed in the abutting spherical surfaces of the spherical bearing assembly, and an insertable wafer can be placed in such slots to selectively limit the pivoting movement of the hollow cylindrical roller.

REFERENCES:
patent: 3803682 (1974-04-01), Stein
patent: 5415611 (1995-05-01), Krayenhagen
patent: 5451197 (1995-09-01), Grant
patent: 5522785 (1996-06-01), Kedl et al.

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