Web winding apparatus

Claim 2

In a winding machine for winding a plurality of packages simultaneously, a drive shaft for receiving a plurality of cores and a clutch for clutching each core to the shaft comprising concentrically arranged inner and outer parts mounted on the shaft with the inner part fixed to the shaft and the outer part rotatably supported on the inner part by bearings for rotation relative to the inner part, said parts having at their outer and inner sides, respectively, radially protruding surfaces of predetermined axial length defining annular working gaps between the parts, particulate magnetizable material situated in the working gaps, means for magnetizing the particular material in the working gaps and means for confining the particulate material in the working gaps comprising nonmagnetizable sealing rings at the ends of the radially protruding surfaces having opposed surfaces which define closure gaps at the ends of the working gaps which converge axially outwardly of the working gaps and resilient sealing strips supported for engagement with the outer sides of the sealing rings across the closure gaps.

Claim 3

Apparatus according to claim 1 wherein the means for magnetizing the particulate material is recessed into the inner part.

Claim 4

Apparatus according to claim 1 wherein the inner parts contain an annular recess and the means for magnetizing the particular material is a coil supported in the recess, grounded at one end to the inner part and electrically connected at its other end through an insulator to a conductor extending along the shaft.

Claim 5

Apparatus according to claim 1 wherein the sealing rings are recessed into the ends of the protruding surfaces.

Claim 6

Apparatus according to claim 1 wherein the sealing rings are nonmagnetic.

Claim 7

Apparatus according to claim 1 wherein the sealing strips are fibrous.

Claim 8

Apparatus according to claim 1 wherein the outer sides of the sealing rings are beveled so as to have minimal engagement with the sealing strips.

Claim 9

In a winding machine for winding a plurality of packages simultaneously, a winding shaft for receiving a plurality of cores, a clutch for clutching each winding core to the winding shaft comprising concentrically arranged inner and outer parts, means for securing the inner part to the shaft for rotation therewith, bearings on the inner part mounting the outer part thereon for rotation relative to the inner part, axially spaced radially protruding surfaces on the inner part, defining an annular recess therebetween, a radially protruding core on the outer part corresponding in axial length to the distance between the outer sides of the radially protruding surfaces on the inner part, said axially spaced radial surfaces on the inner part and the opposed surface of the core on the outer part defining working gaps, a coil wound onto the inner part in the annular recess, a quantity of particulate magnetizable material in the recess and means for retaining the particulate material within the working gaps comprising nonmagnetizable rings recessed into the outer sides of the protruding surfaces in concentric relation to each other with closure gaps therebetween which decrease from the inner sides of the rings toward the outer sides and sealing strips held engaged with the outer sides of the rings across the gaps therebetween.

Claim 10

In a winding machine for winding a plurality of packages simultaneously, a winding shaft for receiving a plurality of cores, a clutch for clutching each winding core to the winding shaft comprising concentrically arranged inner and outer parts, means for securing the inner part to the shaft for rotation therewith, bearings on the inner part mounting the outer part thereon for rotation relative to the inner part, axially spaced radially protruding surfaces on the inner part, defining an annular recess therebetween, a radially protruding core on the outer part corresponding in axial length to the distance between the outer sides of the radially protruding surfaces on the inner part, said axially spaced radial surfaces on the inner part and the opposed surface of the core on the outer part defining working gaps, a coil wound onto the inner part in the annular recess, a quantity of particulate magnetizable material in the recess and means for retaining the particulate material within the working gaps comprising nonmagnetizable rings recessed into the outer sides of the protruding surfaces in concentric relation to each other with closure gaps therebetween which decrease from the inner sides of the rings toward the outer sides and sealing strips held engaged with the outer sides of the rings across the gaps therebetween.

Claim 11

Apparatus according to claim 8 wherein a bus bar is recessed into the shaft and extends axially therealong and there are means grounding the coils to the inner part and connecting the coils to the bus bar.

Claim 12

Apparatus according to claim 9 wherein the latter means comprises insulators mounted in openings in the inner parts in communication with the bus bar and spring pressed contacts yieldably supported in the insulators and electrically connected to the coils.

Claim 13

Apparatus according to claim 1 wherein the inner and outer parts contain annular recesses for receiving the bearing assemblies.

Claim 14

Apparatus according to claim 1 wherein the particles of the particulate material are relatively small.

Claim 15

Apparatus according to claim 1 wherein the distance between the surfaces defining the working gaps is in the order of 1/8 inch.

Claim 16

In a winding machine for winding a plurality of packages simultaneously, a drive shaft for receiving a plurality of cores and a clutch for clutching each winding core to the shaft comprising concentrically arranged inner and outer parts, said inner part comprising an inner sleeve mounted on a shaft, for rotation therewith, and said outer part comprising an outer sleeve of larger inside diameter than the inner sleeve, bearing means mounting the outer sleeve on the inner sleeve for rotation relative thereto, axially spaced radially protruding flanges on the outer side of the inner sleeve providing relatively narrow circumferential surfaces between which there is an annular recess, an axially protruding cylindrical core providing a broad circumferential surface on the inner side of the outer sleeve corresponding in axial length to the axial distance between the outer side of the flanges, the surfaces of the flanges and the core defining annular working gaps, a coil disposed in the recess between the flanges, a particulate magnetizable material disposed in the recess about the coil and means for retaining the particulate material within the working gaps comprising sealing rings recessed into the outer sides and ends of the flanges and core, said rings having opposed clearance surfaces which converge outwardly and outer sides which are beveled and sealing strips held engaged with the beveled surfaces of the sealing rings across the sealing gaps therebetween.

Claim 17

In a winding machine for winding a plurality of packages simultaneously, a drive shaft for receiving a plurality of cores and a clutch for clutching each winding core to the shaft comprising concentrically arranged inner and outer parts, said inner part comprising an inner sleeve mounted on a shaft, for rotation therewith, and said outer part comprising an outer sleeve of larger inside diameter than the inner sleeve, bearing means mounting the outer sleeve on the inner sleeve for rotation relative thereto, axially spaced radially protruding flanges on the outer side of the inner sleeve providing relatively narrow circumferential surfaces between which there is an annular recess, an axially protruding cylindrical core providing a broad circumferential surface on the inner side of the outer sleeve corresponding in axial length to the axial distance between the outer side of the flanges, the surfaces of the flanges and the core defining annular working gaps, a coil disposed in the recess between the flanges, a particulate magnetizable material disposed in the recess about the coil and means for retaining the particulate material within the working gaps comprising sealing rings recessed into the outer sides and ends of the flanges and core, said rings having opposed clearance surfaces which converge outwardly and outer sides which are beveled and sealing strips held engaged with the beveled surfaces of the sealing rings across the sealing gaps therebetween.

Claim 18

Apparatus according to claim 14 wherein there are means for fixing the inner parts to the shaft.

Claim 19

Apparatus according to claim 14 wherein there is a bus bar recessed into the shaft and extending between the outer surfaces of the shaft and the inner surfaces of the inner parts and there are insulated connectors extending from the coils through the inner parts into engagement with the bus bar.

Claim 20

Apparatus according to claim 14 wherein the flanges are formed integral with the inner part and the core is affixed into the inner side of the outer part.

Claim 21

A winding apparatus comprising a shaft, winding cores disposed along the shaft, means for clutching each core to the shaft independently of the others, each means comprising an inner part adapted to be secured to the shaft for rotation therewith, an outer part adapted to be supported for rotation above the inner part, said outer part having a larger inside diameter than the inner part, bearing members supporting the outer part in concentric relation to the inner part, axially spaced radially extending flanges on the outer surface of the inner part between which there is an annular recess, an axially extending core protruding radially from the inner side of the outer part, the peripheral surfaces of the flanges and the core defining working gaps, a coil disposed in the annular recess, particulate magnetizable material disposed in the recess about the coil, means for retaining the particulate material in the working gaps, and means including a potentiometer connecting the coil of each clutch means to a power source.

Claim 22

A winding apparatus comprising a shaft, winding cores disposed along the shaft, means for clutching each core to the shaft independently of the others, each means comprising an inner part adapted to be secured to the shaft for rotation therewith, an outer part adapted to be supported for rotation above the inner part, said outer part having a larger inside diameter than the inner part, bearing members supporting the outer part in concentric relation to the inner part, axially spaced radially extending flanges on the outer surface of the inner part between which there is an annular recess, an axially extending core protruding radially from the inner side of the outer part, the peripheral surfaces of the flanges and the core defining working gaps, a coil disposed in the annular recess, particulate magnetizable material disposed in the recess about the coil, means for retaining the particulate material in the working gaps, and means including a potentiometer connecting the coil of each clutch means to a power source.

Claim 23

A winding apparatus according to claim 18, comprising electrical conductors on the shaft extending therealong to each of the clutch means, and means connecting the coil of each clutch means to an electric conductor, and grounding each coil to the inner part to provide for current flow through the coil of each clutch means.

Claim 24

A winding apparatus comprising a shaft, winding cores disposed along the shaft, means for clutching each core to the shaft, comprising electromagnetic clutch assemblies mounted along the shaft one for each core each provided with a separate lead and current control device such that each can be adjusted independently of the other, each magnetic assembly comprising an inner part adapted to be fixed to the shaft for rotation therewith, an outer part, a bearing supporting the outer part in concentric relation to the inner part, said inner and outer parts having, respectively, outer and inner surfaces which define work gaps, magnetizable particulate material situated in the gaps, means embodied in the inner part for generating an electromagnetic field in the gaps between the surfaces, nonmagnetizable insulators outwardly of the respective ends of the surfaces defining sealing gaps which converge outwardly but do not touch and sealing strips held in engagement with said insulators across the gaps therebetween.

Claim 25

A winding apparatus comprising a shaft, winding cores disposed along the shaft, means for clutching each core to the shaft, comprising electromagnetic clutch assemblies mounted along the shaft one for each core each provided with a separate lead and current control device such that each can be adjusted independently of the other, each magnetic assembly comprising an inner part adapted to be fixed to the shaft for rotation therewith, an outer part, a bearing supporting the outer part in concentric relation to the inner part, said inner and outer parts having, respectively, outer and inner surfaces which define work gaps, magnetizable particulate material situated in the gaps, means embodied in the inner part for generating an electromagnetic field in the gaps between the surfaces, nonmagnetizable insulators outwardly of the respective ends of the surfaces defining sealing gaps which converge outwardly but do not touch and sealing strips held in engagement with said insulators across the gaps therebetween.

Claim 26

An apparatus according to claim 20 wherein the shaft and inner part contain keyways and there is a key disposed in said ways which causes the inner part to rotate with the shaft but permits axial movement of the inner part on the shaft.

Claim 27

An apparatus according to claim 20 wherein the inner and outer parts contain, respectively, peripheral grooves for receiving said bearings and means for preventing axial movement of said bearings.

Claim 28

An apparatus according to claim 22 wherein the means for preventing the axial movement of the bearings in said grooves comprise spring rings set into the outer part against the bearings.

Claim 29

In an apparatus for unwinding sheet material from a package, dividing it into narrow strips and rewinding the strips to form separately wound packages, a first shaft on which the package of sheet material is mounted, slitting means over which the sheet material is drawn for slitting it into narrow strips, a second shaft and means for rotating said second shaft, cores on the second shaft on which the narrow strips are to be wound, means on the first and second shafts for adjustably restraining rotation of the package relative to the first shaft and the cores relative to the second shaft, there being one such means associated with each core on the second shaft, means for effecting operation of each of said means independently of any other such means, and means for effecting adjustment of each of said means as the package increases in diameter to maintain predetermined tensions in the strips being wound on the cores.

Claim 30

In an apparatus for unwinding sheet material from a package, dividing it into narrow strips and rewinding the strips to form separately wound packages, a first shaft on which the package of sheet material is mounted, slitting means over which the sheet material is drawn for slitting it into narrow strips, a second shaft and means for rotating said second shaft, cores on the second shaft on which the narrow strips are to be wound, means on the first and second shafts for adjustably restraining rotation of the package relative to the first shaft and the cores relative to the second shaft, there being one such means associated with each core on the second shaft, means for effecting operation of each of said means independently of any other such means, and means for effecting adjustment of each of said means as the package increases in diameter to maintain predetermined tensions in the strips being wound on the cores.

Claim 31

Apparatus according to claim 24 wherein the means on the first shaft is a braking device which opposes rotation of the package thereon.

Claim 32

Apparatus according to claim 24 wherein the means on the second shaft for causing rotation of the cores with the second shaft is a clutching device for clutching the cores to the second shaft.

Claim 33

A winding apparatus comprising a shaft, winding cores disposed along the shaft, means for clutching each core to the shaft independently of the others comprising electromagnetic clutch assemblies mounted along the shaft, each provided with a separate lead and a current control device such that each can be adjusted independently of the others, each electromagnetic clutch comprising an inner part adapted to be fixed to the shaft for rotation therewith, an outer part, bearings supporting the outer part for rotation relative to the inner part, said inner and outer parts having, respectively, outer and inner surfaces which define working gaps, magnetizable material situated in the gaps, means embodied in the inner part for generating an electromagnetic field in the gaps between the surfaces, nonmagnetizable insulators outwardly of the respective ends of the surfaces defining sealing gaps which converge outwardly but do not touch and nonmetallic strips held in engagement with the insulators across the sealing gaps therebetween.

Claim 34

A winding apparatus comprising a shaft, winding cores disposed along the shaft, means for clutching each core to the shaft independently of the others comprising electromagnetic clutch assemblies mounted along the shaft, each provided with a separate lead and a current control device such that each can be adjusted independently of the others, each electromagnetic clutch comprising an inner part adapted to be fixed to the shaft for rotation therewith, an outer part, bearings supporting the outer part for rotation relative to the inner part, said inner and outer parts having, respectively, outer and inner surfaces which define working gaps, magnetizable material situated in the gaps, means embodied in the inner part for generating an electromagnetic field in the gaps between the surfaces, nonmagnetizable insulators outwardly of the respective ends of the surfaces defining sealing gaps which converge outwardly but do not touch and nonmetallic strips held in engagement with the insulators across the sealing gaps therebetween.

Claim 35

A winding apparatus comprising a winding shaft, winding cores disposed along the shaft, means for clutching each core to the shaft independently of the others, comprising magnetic clutch assemblies mounted along the shaft, and means providing each clutch assembly with a separate lead and current control device such that each can be adjusted independently of the others, each magnetic clutch comprising inner and outer concentrically arranged parts, means fixing the inner parts to the shaft, means rotatably supporting the outer parts on the inner parts for rotation relative thereto, poles on the respective parts between which there is a working gap, means for confining particulate magnetizable material in the working gaps, means for driving the shaft and means for producing a magnetic field between the poles for magnetizing the particulate material in the working gaps, said last means comprising a coil associated with one of the parts, means for supplying current to the coil and means for adjusting the current flow through the coil.

Claim 36

A winding apparatus comprising a winding shaft, winding cores disposed along the shaft, means for clutching each core to the shaft independently of the others, comprising magnetic clutch assemblies mounted along the shaft, and means providing each clutch assembly with a separate lead and current control device such that each can be adjusted independently of the others, each magnetic clutch comprising inner and outer concentrically arranged parts, means fixing the inner parts to the shaft, means rotatably supporting the outer parts on the inner parts for rotation relative thereto, poles on the respective parts between which there is a working gap, means for confining particulate magnetizable material in the working gaps, means for driving the shaft and means for producing a magnetic field between the poles for magnetizing the particulate material in the working gaps, said last means comprising a coil associated with one of the parts, means for supplying current to the coil and means for adjusting the current flow through the coil.