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US 2010/0132903 A1Published application
Yankee cylinder for paper producing machine
AssigneeToscotec S.P.A.
InventorsGiovan Battista Mennucci, Simone Pieruccini, Paolo Raffaelli, Francesco Simoncini
Life of this patent
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Abstract
The steel-made Yankee cylinder includes a cylindrical shell (11) joined to two ends (13, 15), to which are fixed respective-support journals (3). The cylindrical shell (11) is joined to the ends through a circumferential weld formed between opposing surfaces of each end and of the cylindrical shell.
Claims44
A steel-made Yankee cylinder comprising:
- a cylindrical shell joined at two ends, to which are fixed respective support journals, wherein the cylindrical shell is joined to each of said ends through a respective circumferential weld bead on the outside of the Yankee cylinder made between opposing surfaces of each end and the cylindrical shell respectively, and a corresponding back weld bead on the inside of the Yankee cylinder;
- and wherein said cylindrical shell has, close to each of its end edges, a portion of cylindrical wall of a thickness gradually increasing from a zone of minimum thickness to a zone of maximum thickness in correspondence of which said weld bead is formed.
(canceled)
A steel Yankee cylinder, comprising:
- a cylindrical shell joined to two terminal ends, to which respective support journals are fixed, wherein said ends are joined to the cylindrical shell through a plurality of screws substantially parallel to the axis of the cylindrical shell, and wherein to the internal surface of each end is welded a ring forming an internal support for the respective end of the cylindrical shell surrounding said ring, at least part of the flexural stress on said cylindrical shell being released on said ring.
Dependencies are inferred from the claim text.