Core chuck

Claim 2

A core chuck for mounting a paper roll on a roll supporting shaft, said chuck comprising a shell and a sleeve, said shell including a smooth projection-free core conforming cylindrical outer wall and a cylindrical inner wall in inwardly spaced concentrical relation to said outer wall, said sleeve extending concentrically through said inner wall, and bearing means mounting said shell on said sleeve for rotation thereabout, said bearing means being engaged between said inner wall and said sleeve and defining a hollow interior therebetween, said sleeve being adapted to clamp to a roll supporting shaft for rotation of a shell engaged roll core thereabout, said shell including a pair of opposed plate-like end walls extending between and fixed to the corresponding ends of the spaced inner and outer concentric cylindrical walls to define a hollow interior within said shell, a first one of said end walls having a peripheral edge portion thereof projecting outwardly beyond said outer wall and defining a core end engaging flange for limiting the inward insertion of the shell within a roll core.

Claim 3

The chuck of claim 1 wherein said bearing means comprises a pair of ball bearing units spaced longitudinally from each other along the length of the concentric sleeve and inner wall.

Claim 4

The chuck of claim 1 wherein said first end wall is provided with at least one hole therethrough, said hole communicating with the interior of the shell between the inner and outer walls.

Claim 5

The chuck of claim 4 wherein said inner wall is provided with a grease fitting accessible through the end wall hole and interiorly communicated with said bearing means for a selective lubrication thereof from exteriorly of said shell.

Claim 6

A core chuck for mounting a paper roll on a roll supporting shaft, said chuck comprising a shell and a sleeve, said shell including a smooth projection-free core conforming cylindrical outer wall and a cylindrical inner wall in inwardly spaced concentrical relation to said outer wall, said sleeve extending concentrically through said inner wall, and bearing means mounting said shell on said sleeve for rotation thereabout, said bearing means being engaged between said inner wall and said sleeve, said sleeve being adpated to clamp to a roll supporting shaft for rotation on a shell engaged roll core thereabout, said shell including a pair of opposed plate-like end walls extending between and fixed to the corresponding ends of the spaced inner and outer concentric cylindrical walls to define a hollow interior within said shell, a first one of said end walls having a peripheral edge portion thereof projecting outwardly beyond said outer wall and defining a core end engaging flange for limiting the inward insertion of the shell within a roll core, said first end wAll being provided with at least one hole therethrough, said hole communicating with the interior of the shell between the inner and outer walls, said inner wall being provided with a grease fitting accessible through the end wall hole and interiorly communicated with said bearing means for a selective lubrication thereof from exteriorly of said shell, said sleeve including an upwardly directed seat integrally formed therewith outward of said first end wall of the shell, said seat being conformable to a roll supporting shaft for a reception of the shaft therein, and a shaft clamping portion removably positionable over the seat for a clamping of a shaft therein.

Claim 7

A core chuck for mounting a paper roll on a roll supporting shaft, said chuck comprising a shell and a sleeve, said shell including a smooth projection-free core conforming cylindrical outer wall and a cylindrical inner wall in inwardly spaced concentrical relation to said outer wall, said sleeve extending concentrically through said inner wall, and bearing means mounting said shell on said sleeve for rotation thereabout, said bearing means being engaged between said inner wall and said sleeve, said sleeve being adpated to clamp to a roll supporting shaft for rotation on a shell engaged roll core thereabout, said shell including a pair of opposed plate-like end walls extending between and fixed to the corresponding ends of the spaced inner and outer concentric cylindrical walls to define a hollow interior within said shell, a first one of said end walls having a peripheral edge portion thereof projecting outwardly beyond said outer wall and defining a core end engaging flange for limiting the inward insertion of the shell within a roll core, said first end wAll being provided with at least one hole therethrough, said hole communicating with the interior of the shell between the inner and outer walls, said inner wall being provided with a grease fitting accessible through the end wall hole and interiorly communicated with said bearing means for a selective lubrication thereof from exteriorly of said shell, said sleeve including an upwardly directed seat integrally formed therewith outward of said first end wall of the shell, said seat being conformable to a roll supporting shaft for a reception of the shaft therein, and a shaft clamping portion removably positionable over the seat for a clamping of a shaft therein.

Claim 8

The chuck of claim 6 including a series of retaining rings precluding a longitudinal shifting between the shell, bearing means and sleeve.