Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1990-04-17
1994-01-04
Stodola, Daniel P.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242 65, B65H 23198, B65H 7700
Patent
active
052753484
ABSTRACT:
A method of winding a web of a polymer film having lateral edges onto a sequence of winding cores to form a sequence of web coils comprising guiding said web by a deflection roller onto a winding drum and then onto a web take-up where the web coils are formed; the winding drum and the take-up each being provided with separate drives for rotating the winding drum and the web coils and for generating a tensile force that acts on said web; the winding drum has a central axis of rotation and a cylindrical contact surface for frictional and essentially non-slipping engagement with the web along a dynamic segment of the contact surface; this segment has a width defined by the web edges and a length defined by a first and a second end line, both extending transversely on the contact surface and parallel to the axis of rotation; the method further comprising continuously monitoring a first value of the tensile force that acts upon the web at the first end line and a second value of said tensile force acting upon the web at the second end line; the drive of the take-up is controlled by the values of the tensile force to obtain a generally smooth appearance of the surface and the end faces of the web coils.
An apparatus is disclosed for carrying out the novel method.
REFERENCES:
patent: 4159808 (1979-07-01), Meihofer
patent: 4191341 (1980-03-01), Looser
patent: 4347993 (1982-09-01), Leonard
patent: 4508284 (1985-04-01), Kataoka
patent: 4634069 (1987-01-01), Kataoka
Nguyen John Q.
Stodola Daniel P.
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