Method of and apparatus for winding web

A method of winding a web, comprising the steps of:

• supporting the web on an outer circumferential surface of a core with a plurality of rollers, and rotating the core with a gap being defined by blocks between the blocks and the outer circumferential surface of the core for passage of the web therethrough;
• retracting said rollers and said blocks from the core successively from regions where a leading end of the web has passed;
• and
• after the web is wound around the core by at least one turn, retracting all the said rollers and said blocks from the core.

An apparatus for winding a web around a core at a high speed, comprising:

• winding tension storing means for storing a winding tension corresponding to the length to which the web is wound around the core;
• torque converting means for reading said winding tension from said winding tension storing means and converting the read winding tension into a winding torque;
• and
• core rotation control means for controlling rotation of the core according to said winding torque;
• said winding tension being set so as to wind the web to a given length around the core under a low tension, then progressively increase the tension of the web at a predetermined rate until reaching a high tension, and thereafter wind the web under a tension which is being reduced from the high tension.

An apparatus for winding a web around a core at a high speed, comprising:

• winding tension storing means for storing a winding tension corresponding to the length to which the web is wound around the core;
• torque converting means for reading said winding tension from said winding tension storing means and converting the read winding tension into a winding torque;
• and
• core rotation control means for controlling rotation of the core according to said winding torque;
• said winding tension being set so as to wind the web to a given length, which corresponds to the length of the core, around the core under a low tension, then increase the tension of the web to a high tension, and thereafter wind the web under a tension which is being reduced from the high tension.

An apparatus for winding a web around a core, comprising:

• a core rotating mechanism for rotating the core;
• and
• a winding mechanism for guiding the web around the core when the core is rotated;
• said winding mechanism comprising:
• a movable pressing roller for pressing the web against the core to support the web thereon and for being pressed against the core in a direction opposite to the direction in which the tension of at least the web is applied;
• and
• a plurality of movable blocks for creating a gap for passage of the web between the movable blocks and an outer circumferential surface of the core.