Center rewinder with two turrets and a bedroll with two transfer positions for transferring a web to each of the turrets

Abstract

A rewinder includes a bedroll and first and second turrets. Each turret includes a plurality of rotatable mandrels. The bedroll includes a web-transferring mechanism for transferring a web on the bedroll to a mandrel at first and second rotational positions of the bedroll. The first turret is rotatable to successively move each of its mandrels to a first web-transferring position adjacent the first rotational position of the bedroll. The second turret is rotatable to successively move each of its mandrels to a second web-transferring position adjacent the second rotational position of the bedroll. After a web is transferred to a mandrel, the mandrel rotates to wind the web into a log. As the web is being wound on a mandrel of one of the turrets, a completed log on the other turret is removed.

1 . An apparatus for transferring a web at two different transfer positions comprising: 
 a frame,    a roll rotatably mounted on the frame for rotation about a longitudinal axis, the roll having an outer surface for contacting a web,    first and second web-winding members rotatably mounted on the frame for winding a web,    a web-transferring member movably mounted on the roll and being movable between a first position and a second position in which the web-transferring member transfers a web to one of the web-winding members, and    means for moving the web-transferring member to said second position at a first rotational position of the roll for transferring a web to the first web-winding member and for moving the web-transferring member to said second position at a second rotational position of the roll for transferring a web to the second web-winding member.    
   
   
       2 . The apparatus of  claim 1  in which said web-transferring member includes pins for piercing a web.  
   
   
       3 . The apparatus of  claim 1  in which the web-transferring member includes pads for pushing a web away from the outer surface of the roll.  
   
   
       4 . The apparatus of  claim 1  in which the roll includes a journal rotatably mounted on the frame, said means for moving the web-transferring member including a hub rotatably mounted on the journal and drive means connecting said hub to said web-transferring member for moving the web-transferring member between the first and second positions, and means for varying the rotational speed of the hub with respect to the rotational speed of the roll.  
   
   
       5 . The apparatus of  claim 1  in which the web-transferring member includes pins movable between a first position in which the pins do not engage a web on the outer surface of the roll and a second position in which the pins pierce a web on the outer surface of the roll and pads movable between a first position in which the pads do not engage a web on the outer surface of the roll and a second position in which the pads engage a web on the outer surface of the roll, the roll including a journal rotatably mounted on the frame, first and second hubs rotatably mounted on the journal, first drive means connecting the first hub to said pins for moving the pins between the first and second positions, second drive means connecting the second hub to said pads for moving the pads between the first and second positions, means for varying the rotational speed of the first hub with respect to the rotational speed of the roll, and means for varying the rotational speed of the second hub with respect to the rotational speed of the roll.  
   
   
       6 . The apparatus of  claim 1  including first and second turrets rotatably mounted on the frame for rotation about a longitudinal axis, said first web-winding member being rotatably mounted on the first turret and said second web-winding member being rotatably mounted on the second turret, said first turret being rotatable to move said first web-winding member to a first web-transferring position adjacent said first rotational position of said roll whereby a web may be transferred from the roll to the first web-winding member, said second turret being rotatable to move said second web-winding member to a second web-transferring position adjacent said second rotational position of said roll whereby a web maybe transferred from the roll to the second web-winding member.  
   
   
       7 . An apparatus for transferring a web at two different transfer positions comprising: 
 a frame,    a roll rotatably mounted on the frame for rotation about a longitudinal axis, the roll having an outer surface for contacting the web,    a first turret rotatably mounted on the frame for rotation about a longitudinal axis,    a plurality of web-winding members rotatably mounted on the first turret, rotation of the first turret bringing each of the web-winding members of the first turret into a first transfer position which is adjacent the roll at a first rotational position of the roll,    a second turret rotatably mounted on the frame for rotation about a longitudinal axis,    a plurality of web-winding members rotatably mounted on the second turret, rotation of the second turret bringing each of the web-winding members of the second turret into a second transfer position which is adjacent the roll at a second rotational position of the roll,    whereby a web on the roll can be transferred to a web-winding member on the first turret at the first rotational position of the roll and can be transferred to a web-winding member on the second turret at the second rotational position of the roll.    
   
   
       8 . The apparatus of  claim 7  including means for transferring a web to a web-winding member on the first turret at the first rotational position of the roll and for transferring a web to a web-winding member on the second turret at the second rotational position of the roll.  
   
   
       9 . The apparatus of  claim 8  in which said transfer means includes a pusher movably mounted on the roll.  
   
   
       10 . The apparatus of  claim 9  in which said transfer means includes means on a web-winding member on the first turret for holding a web and means on a web-winding member on the second turret for holding a web.  
   
   
       11 . The apparatus of  claim 10  in which each of said means for holding a web includes adhesive on the web-winding member.  
   
   
       12 . The apparatus of  claim 8  in which said transferring means includes adhesive on a web-winding member on the first turret and adhesive on a web-winding member on the second turret.  
   
   
       13 . The apparatus of  claim 7  including a blade mounted on the frame adjacent said roll for severing a web on the roll, pins movably mounted on the roll for movement between a retracted position below the surface of the roll and an extended position above the surface of the roll for retaining a web on the roll, and means for moving the pins from the extended position to the retracted position as the roll moves toward the first rotational position and for moving the pins from the extended position to the retracted position as the roll moves toward the second rotational position.