US 4,993,652 AGranted

Continuous winder for web materials

AssigneeThe Black Clawson Company

InventorRobert F. Moeller

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Abstract

A continuous winder for web material includes two pairs of turret arms mounted for rotation with respect to each other on a common axis, and also includes a lay-on roll mounted for lateral movement toward and away from the axis of the turret arms. The lay-on roll maintains pressure engagement with the winding roll until the interval of actual roll changing, when it moves from the wound roll into pressure engagement with the new core with the web running therebetween, whereupon the web is cut between the two rolls to complete the roll change. The knife assembly for cutting the web is carried by another pair of pivotally mounted arms and includes a clamp mechanism on each arm which effects rotatable clamping engagement with the adjacent turret arm carrying the new core so that the knife arms and the core-carrying turret arms travel together throughout the actual operation of roll changing and thereby assure that the knife is held in proper relation with the core before the roll change is made and while it is being made.

Claims12

Dependent claims

Apparatus for continuously winding web material into rolls on successive cores while maintaining said web under substantially constant tension during transfer from a full roll to a new core, and while preventing fold-back of the leading end of said web on each new core, comprising:

(a) a base structure including a pair of spaced opposed end stands,
(b) two turret arms mounted in each of said end stands for rotation with respect to each other on a common axis and each including means for rotatably supporting a new core,
(c) means coupling said turret arms in opposed pairs,
(d) means for selectively indexing each of said pairs of turret arms about said common axis,
(e) a rider roll mounted for movement along a predetermined path toward and away from said common axis of said turret arms,
(f) means establishing a roll changing zone defined by predetermined angularly spaced positions of said pairs of turret arms on opposite sides of said rider roll path wherein the web is severed from a full roll carried by one of said pairs of turret arms and transferred to a new core carried by the other said pair of turret arms,
(g) means for guiding the web between said rider roll and said common axis,
(h) yieldable means arranged to bias said rider roll toward said common axis and thereby to press the web against a winding roll or a new core supported within said zone by one of said pairs of turret arms,
(i) said indexing means cooperating with said yieldable means to move both of said pairs of turret arms simultaneously in the same direction and thereby to move a full roll supported by one of said pairs of turret arms out of engagement with said rider roll and to move a new core supported by the other said pair of turret arms into engagement with said rider roll with the web therebetween while maintaining both of said pairs of turret arms within said zone,
(j) a web cutting knife assembly including a pair of third arms mounted for rotational movement on said base structure about a second common axis parallel with and spaced from said common axis of said turret arms,
(k) said knife assembly including a knife blade mounted for movement on said pair of third arms between a retracted position and an advanced cutting position,
(l) said knife assembly including means on each of said pair of third arms responsive to movement of said blade to said advanced position thereof for effecting a relatively rotatable connection between said third arm and the adjacent said turret arm, which connection is coaxial with a new core supported in said turret arm, whereby said connected pairs of third and turret arms move together in angularly opposite directions through said roll changing zone, and
(m) means for causing said knife to sever the web material at a position within said zone between said full roll and said new core and causing the cut leading end of the web material to wind on said new core.

10 more elements

(a) a base structure including a pair of spaced opposed end stands,
(b) two turret arms mounted in each of said end stands for rotation with respect to each other on a common axis and each including means for rotatably supporting a new core,
(c) means coupling said turret arms in opposed pairs,
(d) means for selectively indexing each of said pairs of turret arms about said common axis,
(e) a rider roll mounted for movement along a predetermined path toward and away from said common axis of said turret arms,
(f) means establishing a roll changing zone defined by predetermined angularly spaced positions of said pairs of turret arms on opposite sides of said rider roll path wherein the web is severed from a full roll carried by one of said pairs of turret arms and transferred to a new core carried by the other said pair of turret arms,
(g) means for guiding the web between said rider roll and said common axis,
(h) yieldable means arranged to bias said rider roll toward said common axis and thereby to press the web against a winding roll or a new core supported within said zone by one of said pairs of turret arms,
(i) said indexing means cooperating with said yieldable means to move both of said pairs of turret arms simultaneously in the same direction and thereby to move a full roll supported by one of said pairs of turret arms out of engagement with said rider roll and concurrently to move a new core supported by the other said pair of turret arms into engagement with said rider roll with the web therebetween while maintaining both of said pairs of turret arms within said zone, and
(j) means for severing the web material at a position within said zone between said full roll and said new core to effect a roll change.

7 more elements

Dependencies are inferred from the claim text.