Slitter blade mounting assembly

Claim 2

A web slitting apparatus comprising, upper and lower discshaped cutter blades mounted, respectively, on upper and lower slitter blade assemblies such that the blades are rotatable about generally parallel axes for slitting lengthwise a web passing between the blades, an elongated rail, at least one of said assemblies including; a frame mounted on and movable along the rail to vary the position of the assembly along the rail, a pair of arms, pivotally connected to the frame for movement about a pivot axis generally parallel to the blade axes, said arms extending outwardly from said pivot axis and being generally horizontal when the blades engage, a bearing assembly connecting these arms together at their outer ends, the said one blade being mounted on said bearing assembly between said arms, means interconnecting the frame and the arms to move the axis of the said one blade towards and away from the axis of the other blade and including means for turning said arms about an axis generally perpendicular to the said pivot axis to toe-in the said one slitter blade relative to the other slitter blade.

Claim 3

A web slitting apparatus according to claim 1 including a stop means for limiting movement of the arm and the said one blade towards the other blade under the action of said fluid operated piston-and-cylinder unit, and a spring mounted between the frame and the arm to urge the arm and the said one blade away from the other blade.

Claim 4

A web slitting apparatus according to claim 1 including a further fluid operated piston-and-cylinder unit located in one of the said arms for moving the blade parallel to its axis towards and away from the other blade.

Claim 5

A web slitting apparatus according to claim 3, in which the said further piston-and-cylinder unit acts directly on the bearing assembly of the said one blade.

Claim 6

A web slitting apparatus according to claim 1, wherein the last said means includes a pair of inclined cams mounted on opposite sides of the slitter assembly, and follower means mounted one on each arm and engaging said cams and movable thereover to cause said turning movement.

Claim 7

A web slitting apparatus according to claim 1, wherein the outer end of one of said arms is turnable about an axis through that arm relative to the remainder of that arm whereby said end is movable out of the axis of the said one blade.

Claim 8

A web slitting apparatus according to claim 6, including a nut holding the blade on the bearing assembly, said nut being positioned On the side of the blade towards the said one arm having the movable outer end, the said nut being removable from the bearing assembly in an axial direction, whereby when the said outer end of the said one arm is turned about the said axis and the said nut is moved axially, the said one blade can be removed axially from the bearing assembly.

Claim 9

A web slitting apparatus according to claim 1, including a connecting means for interconnecting said arms, and wherein the means interconnecting the frame and the arms comprises a piston connected to the connecting means and a cylinder cooperating with the piston and connected to the frame.

Claim 10

A web slitter assembly comprising a pair of disc-shaped slitter blades rotatable about generally parallel axes and arranged to move into engagement with each other to slit lengthwise a web passing between the blades in a plane generally parallel to the axes of the blades, said assembly including an upper slitter blade assembly and a lower slitter blade assembly, each of said assemblies being mounted on a rail for movement therealong, whereby the position of the slitter blades on the respective rails can be varied, and wherein at least one of said slitter blade assemblies includes a fluid operated means for clamping that slitter blade assembly against its respective rail.

Claim 11

A web slitter assembly comprising a pair of disc-shaped slitter blades rotatable about generally parallel axes and arranged to move into engagement with each other to slit lengthwise a web passing between the blades in a plane generally parallel to the axes of the blades, said assembly including an upper slitter blade assembly and a lower slitter blade assembly, each of said assemblies being mounted on a rail for movement therealong, whereby the position of the slitter blades on the respective rails can be varied, and wherein at least one of said slitter blade assemblies includes a fluid operated means for clamping that slitter blade assembly against its respective rail.

Claim 12

A web slitter assembly comprising a pair of disc-shaped slitter blades rotatable about generally parallel axes and arranged to move into engagement with each other to slit lengthwise a web passing between the blades in a plane generally parallel to the axes of the blades, said assembly including an an upper slitter blade assembly and a lower slitter blade assembly, at least one of said assemblies including a means for turning that assembly and hence also turning the blade about an axis generally perpendicular to the plane of the web being cut to toe-in that slitter blade relative to the slitter blade of the other assembly, the last said means including a pair of inclined cams mounted on opposite sides of the said one assembly, and follower means engaging said cams and movable thereover to cause said turning movement.

Claim 13

A web slitter assembly comprising a pair of disc-shaped slitter blades rotatable about generally parallel axes and arranged to move into engagement with each other to slit lengthwise a web passing between the blades in a plane generally parallel to the axes of the blades, said assembly including an an upper slitter blade assembly and a lower slitter blade assembly, at least one of said assemblies including a means for turning that assembly and hence also turning the blade about an axis generally perpendicular to the plane of the web being cut to toe-in that slitter blade relative to the slitter blade of the other assembly, the last said means including a pair of inclined cams mounted on opposite sides of the said one assembly, and follower means engaging said cams and movable thereover to cause said turning movement.

Claim 14

A web slitting apparatus comprising, upper and lower disc-shaped cutter blades mounted, respectively, on upper and lower slitter blade assemblies such that the blades are rotatable about generally parallel axes for slitting lengthwise a web passing between the blades, an elongated rail, at least one of said assemblies including; a frame mounted on and movable along the rail to vary the position of the assembly along the rail, a pair of arms pivotally connected to the frame for movement about a pivot axis generally parallel to the blades axes, said arms extending outwardly from said pivot axis and being generally horizontal when the blades engage, a bearing assembly connecting these arms together at their outer ends, the said one blade being mounted on said bearing assembly between said arms, means interconnecting the frame and the arms to move the axis of the said one blade towards and away from the axis of the other blade, and including a further fluid operated piston and cylinder unit located in one of the said arms for moving the blade parallel to its axis towards and away from the other blade.

Claim 15

A web slitting apparatus comprising, upper and lower disc-shaped cutter blades mounted, respectively, on upper and lower slitter blade assemblies such that the blades are rotatable about generally parallel axes for slitting lengthwise a web passing between the blades, an elongated rail, at least one of said assemblies including; a frame mounted on and movable along the rail to vary the position of the assembly along the rail, a pair of arms pivotally connected to the frame for movement about a pivot axis generally parallel to the blades axes, said arms extending outwardly from said pivot axis and being generally horizontal when the blades engage, a bearing assembly connecting these arms together at their outer ends, the said one blade being mounted on said bearing assembly between said arms, means interconnecting the frame and the arms to move the axis of the said one blade towards and away from the axis of the other blade, and including a further fluid operated piston and cylinder unit located in one of the said arms for moving the blade parallel to its axis towards and away from the other blade.

Claim 16

A web slitting apparatus comprising, upper and lower disc-shaped cutter blades mounted, respectively, on upper and lower slitter blade assemblies such that the blades are rotatable about generally parallel axes for slitting lengthwise a web passing between the blades, an elongated rail, at least one of said assemblies including: a frame mounted on and movable along the rail to vary the position of the assembly along the rail, a pair of arms pivotally connected to the frame for movement about a pivot axis generally parallel to the blades axes, said arms extending outwardly from said pivot axis and being generally horizontal when the blades engage, a bearing assembly connecting these arms together at their outer ends, the said oNe blade being mounted on said bearing assembly between said arms, means interconnecting the frame and the arms to move the axis of the said one blade towards and away from the axis of the other blade, and wherein the outer end of one of said arms is turnable about an axis through that arm relative to the remainder of that arm whereby said end is movable out of the axis of the said one blade.

Claim 17

A web slitting apparatus comprising, upper and lower disc-shaped cutter blades mounted, respectively, on upper and lower slitter blade assemblies such that the blades are rotatable about generally parallel axes for slitting lengthwise a web passing between the blades, an elongated rail, at least one of said assemblies including: a frame mounted on and movable along the rail to vary the position of the assembly along the rail, a pair of arms pivotally connected to the frame for movement about a pivot axis generally parallel to the blades axes, said arms extending outwardly from said pivot axis and being generally horizontal when the blades engage, a bearing assembly connecting these arms together at their outer ends, the said oNe blade being mounted on said bearing assembly between said arms, means interconnecting the frame and the arms to move the axis of the said one blade towards and away from the axis of the other blade, and wherein the outer end of one of said arms is turnable about an axis through that arm relative to the remainder of that arm whereby said end is movable out of the axis of the said one blade.