Apparatus and method for winding paper
First Claim
1. An apparatus for winding a web of paper material into a roll, the apparatus comprising:
- a rotatably mounted reel spool onto which the web of paper material is to be wound to form a roll of increasing diameter;
a reel drum rotatably mounted adjacent to the reel spool;
a carriage supporting one of the reel drum and the reel spool so as to be movable relative to the other and positioning said one of the reel drum and the reel spool adjacent to the other such that a nip is formed therebetween;
an actuator connected to the carriage and operable for moving the carriage to urge the reel drum and the reel spool relatively toward each other so as to cause the reel drum to indent the roll of paper radially inward locally at the nip;
a sensor unit which provides a signal indicative of the radial indentation of the reel drum into the roll of paper; and
a controller connected to the sensor unit and to the actuator and operable for controlling the actuator to move the carriage so as to maintain within predetermined limits the amount of radially inward indentation of the reel drum into the paper roll at the nip.
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Accused Products
Abstract
Apparatus and method for winding paper onto a parent roll includes a rotatable reel spool onto which the paper web is wound and a reel drum over which the paper web is guided and which contacts the parent roll to form a nip at which the paper is wound onto the parent roll. In one embodiment, sensors are used for determining the indented thickness of the parent roll at the nip and the unindented thicknesses of the parent roll spaced from the nip, from which a radial indentation is derived. A control relatively positions the reel spool and reel drum to maintain the radial indentation within predetermined limits. In another embodiment of the invention, control of linear nip load is accomplished by measuring a diameter of the paper roll and a force indicative of linear nip load, and controlling relative positioning of the reel spool and reel drum to maintain the force within predetermined limits that are based on the diameter of the roll.
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Citations
27 Claims
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1. An apparatus for winding a web of paper material into a roll, the apparatus comprising:
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a rotatably mounted reel spool onto which the web of paper material is to be wound to form a roll of increasing diameter; a reel drum rotatably mounted adjacent to the reel spool; a carriage supporting one of the reel drum and the reel spool so as to be movable relative to the other and positioning said one of the reel drum and the reel spool adjacent to the other such that a nip is formed therebetween; an actuator connected to the carriage and operable for moving the carriage to urge the reel drum and the reel spool relatively toward each other so as to cause the reel drum to indent the roll of paper radially inward locally at the nip; a sensor unit which provides a signal indicative of the radial indentation of the reel drum into the roll of paper; and a controller connected to the sensor unit and to the actuator and operable for controlling the actuator to move the carriage so as to maintain within predetermined limits the amount of radially inward indentation of the reel drum into the paper roll at the nip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of winding a web of paper material into a roll, the method comprising:
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positioning one of a reel drum and a reel spool adjacent to the other such that a nip is formed therebetween; rotating the reel drum and the reel spool so that the web of paper material is wound on the reel spool to form a paper roll of increasing diameter; applying a force to one of the reel drum and reel spool such that the reel drum is indented into the roll adjacent the nip; sensing the indentation of the reel drum into the paper roll; and adjusting the position of the one of the reel drum and reel spool and the force applied to the one of the reel drum and reel spool to maintain within predetermined limits the indentation of the reel drum into the paper roll as the paper roll increases in diameter. - View Dependent Claims (14, 15, 16, 17)
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18. A method of winding a web of paper material into a roll, the method comprising:
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positioning a mechanism engaging one of a reel drum and reel spool such that a nip is formed between the reel drum and the reel spool; rotating the reel drum and the reel spool so that the web of paper material is wound on the reel spool to form a paper roll of increasing diameter; using the mechanism to apply a force to the one of the reel drum and reel spool so as to create a linear nip load between the reel drum and the reel spool and cause the reel drum to indent the paper roll at the nip; sensing the force applied by the mechanism to the one of the reel spool and reel drum; sensing a diameter of the paper roll; determining limits for the sensed force based on the sensed diameter and a predetermined correlation between force and diameter of the paper roll; and adjusting the position of the mechanism so as to maintain the sensed force within said limits, thereby controlling the linear nip load and indentation of the paper roll at the nip as a function of diameter of the paper roll. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification