Web transfer apparatus
First Claim
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1. An apparatus for transferring a moving web of a flexible material from a first windup core to a second windup core which comprises:
- (a) a plurality of rotatable, speed adjustable windup stations mounted on revolvably indexable turret means; and
(b) directing means for leading said web towards said windup stations; and
(c) a flying knife assembly comprising a pair of spaced cutting means mounted for translation along at least one path, which path or paths are positioned parallel to the plane of the web path between said turret means and said directing means, said flying knife assembly further comprising means for inserting and retracting said cutting means into and out of the plane of said web path, being capable of forming a leader strip comprising a portion of said web material; and
(d) severing means for completely transversely cutting said leader strip; and
(e) means for increasing the tension on said leader strip prior to cutting said leader strip by said severing means; and
(f) means for matching the speed of said second windup core to the speed of said web; and
(g) fastening means for securing said leader strip to said second windup core while the balance of said web is being wound on said first windup core.
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Abstract
An apparatus and method for transferring a moving web from one windup core to another windup core comprising a plurality of rotatable core chucks mounted on a revolvable turret, means for leading said web towards said cores, and means for forming and severing a leader strip of web material for subsequent securing to an empty cylindrical windup core.
53 Citations
23 Claims
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1. An apparatus for transferring a moving web of a flexible material from a first windup core to a second windup core which comprises:
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(a) a plurality of rotatable, speed adjustable windup stations mounted on revolvably indexable turret means; and (b) directing means for leading said web towards said windup stations; and (c) a flying knife assembly comprising a pair of spaced cutting means mounted for translation along at least one path, which path or paths are positioned parallel to the plane of the web path between said turret means and said directing means, said flying knife assembly further comprising means for inserting and retracting said cutting means into and out of the plane of said web path, being capable of forming a leader strip comprising a portion of said web material; and (d) severing means for completely transversely cutting said leader strip; and (e) means for increasing the tension on said leader strip prior to cutting said leader strip by said severing means; and (f) means for matching the speed of said second windup core to the speed of said web; and (g) fastening means for securing said leader strip to said second windup core while the balance of said web is being wound on said first windup core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17)
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12. The apparatus of claim wherein at least one of said cutting means comprises a laser.
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18. A method for transferring a moving web of a flexible material from a first windup core to a second windup core which comprises:
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(a) winding a moving web of said flexible material around a first windup core; and (b) automechanically forming a leader strip of web material by means of a flying knife assembly comprising a pair of spaced cutting means, said leader strip comprising a portion of said web cut parallel to the direction of travel of said web, the non-leader portion of the cut web defining the balance of the web; and (c) automechanically deflecting the edge of the balance of said web width away from said leader strip; and (d) automechanically increasing the tension on said leader strip; and (e) automechanically severing said leader strip completely across its width by means of a web cutter assembly comprising a cutting means comprising a blade or plurality of blades; and (f) automechanically contacting said leader strip with the surface of said second windup core; and (g) automechanically adhering said leader strip to the surface of said second windup core; and (h) automechanically matching the speed of said second windup core to the speed of said web; and (i) automechanically winding said leader strip around said second windup core while winding the balance of said web material around said first windup core; and (j) automechanically completely cutting the width of said balance of said web material either after step (b) or after step (f) or after step (i). - View Dependent Claims (19, 20, 21, 22, 23)
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Specification