Method and apparatus for winding a continuous fabric on a cylinder in a roll form

In a system for winding a continuous fabric on a cylinder with a wrapping cloth wound therewith, a method for maintaining said fabric in a state of uniform tension comprising the steps of:

• providing pressure against the outer winding of said fabric by establishing pneumatic pressure in a pneumatic cylinder urging a press roller against said fabric;
• sensing the present diameter of fabric and cloth wound on said cylinder;
• sensing the present pneumatic pressure in said cylinder;
• generating a first signal as a predetermined function of the sensed present diameter;
• generating a second signal as a predetermined function of the sensed present pneumatic pressure;
• developing a control signal as a predetermined function of said present diameter and said present pneumatic pressure, said control signal being developed in response to the difference between said first and second signals;
• and
• actuating pressure changes corresponding to changes in said control signal.

In a system for winding a continuous fabric on a cylinder with a wrapping cloth wound therewith, apparatus for maintaining said fabric in a state of uniform tension comprising:

• means for providing gradually increasing pressure against the outer winding of said fabric, including a press roller, a pneumatic cylinder urging said press roller against said fabric, an air inlet, and outlet valves for the compression chamber of said cylinder;
• means for sensing the present diameter of fabric and cloth wound on said cylinder;
• means for sensing the present pneumatic pressure in said chamber;
• means for developing a control signal as a predetermined function of said present diameter and said present pneumatic pressure, said predetermined function being characterized by an exponential curve relationship between said increasing pressure and said present diameter of rolled fabric;
• and
• means for actuating said valves, in response to said control signal, thereby controlling the pressure of said press roller against said cylinder in accordance with said function.

In a system for winding a continuous fabric on a cylinder with a wrapping cloth wound therewith, a method for maintaining said fabric in a state of uniform tension comprising the steps of:

• providing increasing pressure against the outer winding of said fabric by establishing pneumatic pressure in a pneumatic cylinder urging a press roller against said fabric;
• sensing the present diameter of fabric and cloth wound on said cylinder;
• sensing the present pneumatic pressure in said cylinder;
• developing a control signal as a predetermined function of said present diameter and said present pneumatic pressure, said predetermined function being characterized by an exponential curve relationship between said increasing pressure of the press roller and said present diameter of rolled fabric;
• and
• actuating pressure changes corresponding to changes in said control signal.

Apparatus for winding a continuous fabric with uniform tension on a cylinder together with wrapping cloth comprising:

• a roller mounted on a pivotable arm, said roller riding on the outer winding of fabric on said cylinder;
• a cam of predetermined configuration and rotatable in accordance with pivotable movement of said arm, said cam being configured to afford an exponential curve relationship between the control pressure of said press roller and said diameter of rolled fabric, for imparting increasing contact pressure of said contact roller to said outer winding of fabric;
• a rack and pinion, said rack bearing against said cam and movable laterally, in response to cam rotation, to rotate said pinion;
• an air cylinder having a compression chamber therein and a piston means for exerting pressure against said chamber;
• a contact roller mounted on said piston means and bearing against said outer winding of fabric;
• and
• control means, responsive to the position of said pinion, for regulating the air pressure in said compression chamber as an intermediate variable, thereby regulating pressure between said roller and said cylinder as an end variable.