Method of and apparatus for heating a rotary roll

Claim 3

A method, as set forth in claim 1, including providing alternating grooves and lands on the roll surface within the annular space adjacent the exterior surface of the roll structure, and supplying the heat transfer medium within the annular space in such a quantity that in the boiling state the liquid phase of the heat transfer medium can be disposed within the grooves with the vapor phase contacting the lands located between the grooves.

Claim 4

A rotary roll for heating an article, such as a fiber, as it is worked, comprising a centrally disposed support member, a cylindrically shaped member concentrically disposed about and spaced radially outwardly from said support member and forming the outer surface of the roll, wall means, including said member, forming a sealed annular space spaced closely inwardly from the outer surface of the roll, said member being arranged to rotate about the axis of said support member, the sealed annular space within said member being arranged to contain a liquid heat transfer medium capable of being maintained in the boiling state to provide a liquid phase and a vapor phase and so that the liquid phase is sufficient to cover the entire surface of the member defining the outer surface of the annular space, and heating means disposed between said wall means and said support member and heating the heat transfer medium to the boiling state for heating the outer surface of said member.

Claim 5

A rotary roll for heating an article, such as a fiber, as it is worked, comprising a centrally disposed support member, a cylindrically shaped member concentrically disposed about and spaced radially outwardly from said support member and forming the outer surface of the roll, wall means, including said member, forming a sealed annular space spaced closely inwardly from the outer surface of the roll, said member being arranged to rotate about the axis of said support member, the sealed annular space within said member being arranged to contain a liquid heat transfer medium capable of being maintained in the boiling state to provide a liquid phase and a vapor phase and so that the liquid phase is sufficient to cover the entire surface of the member defining the outer surface of the annular space, and heating means disposed between said wall means and said support member and heating the heat transfer medium to the boiling state for heating the outer surface of said member.

Claim 6

A rotary roll, as set forth in claim 3, wherein said member comprises an outer cylinder forming the outer surface of the roll, and a cylindrically shaped sleeve disposed concentrically about said support member and spaced closely radially inwardly from the inner surface of said cylinder for cooperating therewith to form the annular space for receiving the heat transfer medium.

Claim 7

A rotary roll, as set forth in claim 4, wherein the inner surface of said cylinder forming the outer surface of said annular space has a sinuous surface providing alternating grooves and lands extending in the axial direction of said support member.

Claim 8

A rotary roll, as set forth in claim 4, including a hub member integrally secured to said cylinder for mounting said cylinder on said support member, said support member comprising a rotary shaft, and means for fixing said hub to said shaft.

Claim 9

A rotary roll, as set forth in claim 6, wherein said heating means comprises an iron core concentrically disposed about said shaft and spaced radially inwardly from said sleeve, and a coil mounted about said iron core and spaced radially inwardly from the inner surface of said sleeve for forming a predetermined gap therebetween.

Claim 10

A rotary roll, as set forth in claim 4, wherein the interior surface of said cylinder is provided with alternating longitudinally extending lands and grooves with the grooves extending radially outwardly away from said support Member, the surfaces of said lands being disposed in spaced relationship from the radially outer surface of said sleeve.

Claim 11

A rotary roll for heating an article, such as a fiber, as it is worked, comprising a centrally disposed support member, a cylindrically shaped member concentrically disposed about and spaced radially outwardly from said support member and forming the outer surface of the roll, said member forming an annular space spaced closely inwardly from the outer surface of the roll, said member being arranged to rotate about the axis of said support member, the annular space within said member being arranged to contain a liquid heat transfer medium capable of being maintained in the boiling state to provide a liquid phase and a vapor phase and so that the liquid phase is sufficient to cover the entire surface of the member defining the outer surface of the annular space, and heating means disposed between said member and said support member for heating the outer surface of said member and heating the heat transfer medium to the boiling state, wherein said member comprises an outer cylinder forming the outer surface of the roll, a cylindrically shaped sleeve disposed concentrically about said support member and spaced closely radially inwardly from the inner surface of said cylinder for cooperating therewith to form the annular space for receiving the heat transfer medium, a hub member integrally secured to said cylinder for mounting said cylinder on said support member, said support member comprising a rotary shaft, and means for fixing said hub to said shaft, said heating means comprising an iron core concentrically disposed about said shaft and spaced radially inwardly from said sleeve, a coil mounted about said iron core and spaced radially inwardly from the inner surface of said sleeve for forming a predetermined gap therebetween, a bearing box positioned at one end of said shaft for rotatably supporting said shaft, said bearing box being laterally spaced from the adjacent surface of said core, a bolt assembly for securing said core to said bearing box, said bolt assembly comprising a plurality of bolts extending between said bearing box and said core, and an insulating sleeve enclosing each said bolt for the extent of the space between said bearing box and said core.

Claim 12

A rotary roll for heating an article, such as a fiber, as it is worked, comprising a centrally disposed support member, a cylindrically shaped member concentrically disposed about and spaced radially outwardly from said support member and forming the outer surface of the roll, said member forming an annular space spaced closely inwardly from the outer surface of the roll, said member being arranged to rotate about the axis of said support member, the annular space within said member being arranged to contain a liquid heat transfer medium capable of being maintained in the boiling state to provide a liquid phase and a vapor phase and so that the liquid phase is sufficient to cover the entire surface of the member defining the outer surface of the annular space, and heating means disposed between said member and said support member for heating the outer surface of said member and heating the heat transfer medium to the boiling state, wherein said member comprises an outer cylinder forming the outer surface of the roll, a cylindrically shaped sleeve disposed concentrically about said support member and spaced closely radially inwardly from the inner surface of said cylinder for cooperating therewith to form the annular space for receiving the heat transfer medium, a hub member integrally secured to said cylinder for mounting said cylinder on said support member, said support member comprising a rotary shaft, and means for fixing said hub to said shaft, said heating means comprising an iron core concentrically disposed about said shaft and spaced radially inwardly from said sleeve, a coil mounted about said iron core and spaced radially inwardly from the inner surface of said sleeve for forming a predetermined gap therebetween, a bearing box positioned at one end of said shaft for rotatably supporting said shaft, said bearing box being laterally spaced from the adjacent surface of said core, a bolt assembly for securing said core to said bearing box, said bolt assembly comprising a plurality of bolts extending between said bearing box and said core, and an insulating sleeve enclosing each said bolt for the extent of the space between said bearing box and said core.

Claim 13

A rotary roll for heating an article, such as a fiber, as it is worked, comprising a centrally disposed support member, a cylindrically shaped member concentrically disposed about and spaced radially outwardly from said support member and forming the outer surface of the roll, said member forming an annular space spaced closely inwardly from the outer surface of the roll, said member being arranged to rotate about the axis of said support member, the annular space within said member being arranged to contain a liquid heat transfer medium capable of being maintained in the boiling state to provide a liquid phase and a vapor phase and so that the liquid phase is sufficient to cover the entire surface of the member defining the outer surface of the annular space, and heating means disposed between said member and said support member for heating the outer surface of said member and heating the heat transfer medium to the boiling state, wherein said member comprises an outer cylinder forming the outer surface of the roll, a cylindrically shaped sleeve disposed concentrically about said support member and spaced closely radially inwardly from the inner surface of said cylinder for cooperating therewith to form the annular space for receiving the heat transfer medium, a plurality of concentric rings of the same outside diameter disposed within said cylinder and the outer surfaces of said rings being in surface contact with the inner surface of said cylinder, said rings being concentrically disposed about said support member, and the inner surfaces of said rings being arranged to provide alternating axially extending lands and grooves with the grooves extending radially outwardly from said landS in the direction of the outer surface of said cylinder, and the surfaces of said lands being spaced radially outwardly from the outer surfaces of said sleeve.

Claim 14

A rotary roll for heating an article, such as a fiber, as it is worked, comprising a centrally disposed support member, a cylindrically shaped member concentrically disposed about and spaced radially outwardly from said support member and forming the outer surface of the roll, said member forming an annular space spaced closely inwardly from the outer surface of the roll, said member being arranged to rotate about the axis of said support member, the annular space within said member being arranged to contain a liquid heat transfer medium capable of being maintained in the boiling state to provide a liquid phase and a vapor phase and so that the liquid phase is sufficient to cover the entire surface of the member defining the outer surface of the annular space, and heating means disposed between said member and said support member for heating the outer surface of said member and heating the heat transfer medium to the boiling state, wherein said member comprises an outer cylinder forming the outer surface of the roll, a cylindrically shaped sleeve disposed concentrically about said support member and spaced closely radially inwardly from the inner surface of said cylinder for cooperating therewith to form the annular space for receiving the heat transfer medium, a plurality of concentric rings of the same outside diameter disposed within said cylinder and the outer surfaces of said rings being in surface contact with the inner surface of said cylinder, said rings being concentrically disposed about said support member, and the inner surfaces of said rings being arranged to provide alternating axially extending lands and grooves with the grooves extending radially outwardly from said landS in the direction of the outer surface of said cylinder, and the surfaces of said lands being spaced radially outwardly from the outer surfaces of said sleeve.

Claim 15

A rotary roll, as set forth in claim 10, wherein said support member comprises a tubular member, bearing means being mounted on said tubular member at axially spaced positions, and said cylinder being mounted on said bearing means for rotating about said tubular member.