Web transfer device with vacuum hood and methods for web transfer
View Patent ↗A web transfer device for a multiple turret winder on a continuous web process line includes a web delivery assembly having delivery rolls and a core transfer assembly having one or more core receiving structures. The transfer device includes a web transfer assembly configured to receive a web from the web delivery assembly and configured to communicate with the core transfer assembly. The web transfer assembly includes a frame and lay-on roll moveably positioned relative to the frame. The web transfer assembly includes a vacuum hood moveably positioned relative to the frame. The vacuum hood has a cutting device mounted therein and one or more suction holding surfaces that are configured to releasably hold a portion of the web. The suction holding surfaces are movable relative to the frame and the core receiving structures. The suction holding surfaces communicate with the core receiving structures to transfer the web thereto.
1. A web transfer device for a multiple turret winder in a continuous web process line, the transfer device comprising:
a web delivery assembly comprising at least one web delivery roll;
a core transfer assembly comprising at least two core receiving structures; and
a web transfer assembly configured to receive a web from the web delivery assembly and configured to communicate with the core transfer assembly, the web transfer assembly comprising a frame and lay-on roll moveably positioned relative to the frame, the web transfer assembly comprising a vacuum hood assembly moveably positioned relative to the frame,
the vacuum hood assembly comprising:
a pivot assembly for pivotally mounting the vacuum hood assembly to a carriage;
at least one chamber defined within the vacuum hood assembly;
the at least one chamber having a first inlet defined by a first suction holding surface, the first suction holding surface has a first plurality of holes extending therethrough; and
the at least one chamber having a second inlet defined by a second suction holding surface, the second suction holding surface has a second plurality of holes extending therethrough;
wherein the vacuum hood assembly has cutting device mounted therein, the first suction holding surface being configured to releasably hold a portion of the web, the second suction holding surface being movable relative to the frame and the at least one core receiving structure, and at least one of the first and second suction holding surfaces communicating with the at least one core receiving structure to transfer the web thereto.
2. The web transfer device of claim 1 , wherein the first inlet and the second inlet are spaced apart from one another defining a gap therebetween, and a plurality of rollers is positioned in the gap.
3. The web transfer device of claim 1 , wherein the at least one of the first and second suction holding surfaces is coated with a lubricious material.
4. The web transfer device of claim 3 , wherein the lubricious material comprises PTFE.
5. A method for transferring a web in a continuous web process line, the method comprising:
providing a web transfer device for a multiple turret winder, the transfer device comprising a web delivery assembly comprising at least one web delivery roll, a core transfer assembly comprising at least two core receiving structures; and a web transfer assembly configured to receive a web from the web delivery assembly and configured to communicate with the core transfer assembly, the web transfer assembly comprising a frame and lay-on roll moveably positioned relative to the frame, the web transfer assembly comprising a vacuum hood assembly moveably positioned relative to the frame, the vacuum hood assembly having cutting device mounted therein;
a pivot assembly for pivotally mounting the vacuum hood assembly to a carriage;
at least one chamber defined within the vacuum hood assembly;
the at least one chamber having a first inlet defined by a first suction holding surface, the first suction holding surface has a first plurality of holes extending therethrough; and
the at least one chamber having a second inlet defined by a second suction holding surface, the second suction holding surface has a second plurality of holes extending therethrough;
stopping the web on one of the at least two core receiving structures;
holding the web with at least one of the first or second suction holding surfaces;
cutting the web with the cutting device to create a leading edge and a trailing edge;
releasing the trailing edge from the at least one of the first or second suction holding surfaces;
securing the leading edge, via the at least one of the first or second suction holding surfaces, to another of the least two core receiving structures.
6. The method for transferring a web of claim 5 , wherein the cutting of the web is performed before indexing of the at least two core receiving structures with the core transfer assembly.
7. The method for transferring a web of claim 5 , wherein the cutting of the web is performed after indexing of the at least two core receiving structures with the core transfer assembly.
8. The method for transferring a web of claim 5 , wherein the trailing edge is released from the at least one holding surface before releasing the leading edge.
9. The method for transferring a web of claim 5 , wherein the trailing edge is released from the at least one holding surface before indexing of the at least two core receiving structures with the core transfer assembly.
10. The method for transferring a web of claim 5 , wherein the trailing edge is released from the at least one of the first or second holding surfaces after indexing of the at least two core receiving structures with the core transfer assembly.