Method and apparatus for rewinding, severing and transferring web-like material

A method for rewinding and severing a web delivered to a winding core carried by one core station of a rotatable turret having at least one other core station spaced angularly from said one core station and carrying an empty core and then transferring the leading end of the remaining web to said empty core while said winding core is being filled comprising the steps of:

• (a) passing said web between a vacuum transfer roll and a knife roll prior to reaching said winding core at said one core station with said vacuum transfer roll being spaced from said winding core while said web is delivered thereto until said winding core is almost filled,
• (b) rotating said rotatable turret to move said winding core to said other core station as an empty core is moved from said other core station to said one core station,
• (c) moving said vacuum transfer roll toward engagement with said empty core at said one core station when said winding core is almost filled,
• (d) moving said knife roll toward engagement with said vacuum transfer roll with said web therebetween while said vacuum transfer roll is adjacent said empty core, and
• (e) severing said web as it passes between said vacuum transfer roll and said knife roll with said vacuum transfer roll adjacent said empty core at said one core station so that said web is severed at a location spaced forwardly of said empty core as viewed in the direction of travel of said web and the leading end of the remaining web is forced onto said empty core.

Apparatus for rewinding and severing a web delivered to a winding core and then transferring the leading end of the remaining web to an empty core while said winding core is being filled comprising:

• (a) means to pass said web between a vacuum transfer roll and a knife roll prior to reaching said winding core with said vacuum transfer roll being spaced from said winding core while said web is delivered thereto until said winding core is almost filled,
• (b) means to impart relative movement between said vacuum transfer roll and said empty core to position said vacuum transfer roll in engagement with said empty core when said winding core is almost filled,
• (c) means to move said knife roll toward engagement with said vacuum transfer roll with said web therebetween while said vacuum transfer roll is adjacent said empty core, and
• (d) means to sever said web as it passes between said vacuum transfer roll and said knife roll with said vacuum transfer roll adjacent said empty core so that said web is severed at a location spaced forwardly of said empty core as viewed in the direction of travel of said web and the leading end of the remaining web is forced onto said empty core.

Apparatus for rewinding and severing a web delivered to a winding core and then transferring the leading end of the remaining web to an empty core while said winding core is being filled comprising:

• (a) a rotatable turret carrying a first core station and at least one other core station spaced angularly from each other with each of the core stations being adapted to move to a first position to receive a web delivered to its winding core until it is almost filled and then prior to and during severing of its web to a second position which is spaced from said first position an angular distance corresponding to the angular distance between said first core station and said other core station,
• (b) a vacuum transfer roll movable to a first location spaced from said first position of said core stations while said web is being delivered to a winding core at said first position until it is almost filled and then prior to and while said web is severed is movable to a second location adjacent the empty core at said first position,
• (c) a knife roll movable selectively to a first position spaced from said vacuum transfer roll while said web is being delivered therebetween to the winding core at said first position until it is almost filled and to a second position adjacent said vacuum transfer roll prior to and while said web is severed therebetween,
• (d) a knife carried by said knife roll and being movable toward said vacuum transfer roll to sever said web therebetween after movement of said vacuum transfer roll to said second location adjacent said empty core at said first position, and
• (e) means to rotate said turret to move the winding core at said first position to said second position prior to completely filling it and severing said web so that an empty core at said second position is moved to said first position of said core stations and receives said leading end of the remaining web after said web is severed.

Apparatus for rewinding and severing a web delivered to a winding core and then transferring the leading end of the remaining web to an empty core while said winding core is being filled comprising:

• (a) a rotatable turret carrying a first core station and at least one other core station spaced angularly from each other with each of the core stations being adapted to move to a first position to receive a web delivered to its winding core until it is almost filled and then prior to and during severing of its web to a second position which is spaced from said first position an angular distance corresponding to the angular distance between said first core station and said other core station;
• (b) a vacuum transfer roll movable to a first location spaced from said first position of said core stations while said web is being delivered to a winding core at said first position until it is almost filled and then prior to and while said web is severed is movable to a second location adjacent the empty core at said first position;
• (c) a knife roll movable selectively to a first position spaced from said vacuum transfer roll while said web is being delivered therebetween to the winding core at said first position until it is almost filled and to a second position adjacent said vacuum transfer roll prior to and while said web is severed therebetween;
• (d) a knife carried by said knife roll and being movable toward said vacuum transfer roll to sever said web therebetween after movement of said vacuum transfer roll to said second location adjacent said empty core at said first position, said knife being movable from a position inwardly of the outer surface of said knife roll to a position outwardly thereof and actuator means is operatively connected to said knife for moving said knife toward said vacuum transfer roll, said knife being carried by an elongated member mounted for longitudinal movement within the confines of said knife roll and said actuator means comprises,
• (i) at least two longitudinally spaced arms with one end of each arm being pivotally connected to said elongated member and another portion of each arm being pivotally connected to a centrally disposed shaft within said knife roll and defining a parallelogram assembly wherein said elongated member and its knife is moved axially and radially toward and away from said vacuum transfer roll upon longitudinal movement of said elongated member to a first position and a second position respectively, and
• (ii) means to move said elongated member selectively to said first position and said second position, comprising:
• a cam surface on a projecting end of said elongated member,
• a clutch unit mounted on said shaft and adapted for relative angular movement therebetween,
• a cam member carried by said clutch unit in position to be engaged by said cam surface, and clutch operator means adapted to engage and disengage said clutch unit and restrain rotation of said clutch unit while it is engaged so that upon subsequent rotation of said knife roll said cam surface engages said cam member carried by said clutch unit and moves said elongated member to said first position and upon disengagement of said clutch unit said elongated member is returned to said second position;
• and
• (e) means to rotate said turret to move the winding core at said first position to said second position prior to completely filling it and severing said web so that an empty core at said second position is moved to said first position of said core stations and receives said leading end of the remaining web after said web is severed.