Roll
AssigneeJ. M. Voith GmbH
InventorChristian Schiel
Life of this patent
Estimating the term…
Abstract
A roll, specifically a paper machine press roll, with a hollow rotatable roll body features a roll shell and on at least one of its two ends a hollow roll journal. A guide body which is stationary or fastened to the roll body extends through the interior of the roll body and forms with the roll shell a channel system through which a tempering medium flows. For purposes of using air as tempering medium, a pressure blower and/or a suction blower are connected to the channel system. The channel system and the blower(s) are so dimensioned that an air flow velocity above 10 m/sec will materialize in the channel system.
Claims9
A roll for forming a press gap with a backing roll, said roll comprising:
- a hollow rotatable roll body having two ends and featuring a roll shell, said roll body including a hollow roll journal at each end thereof, said roll shell and said hollow roll journals defining a one-piece roll body, each of the hollow roll journals and the roll shell having respective inside diameters wherein the inside diameters of the hollow roll journals are smaller than the inside diameter of the roll shell;
- a guide body extending through the interior of said roll body, said guide body being one of stationary and fastened to said roll body, said guide body being formed of a flexible material, said guide body further being sized and configured to be inserted through one of said hollow roll journals and expanded to a cylindrical body inside the roll body, said guide body and said roll shell defining a channel system through which operationally flows a tempering medium;
- and
- blowing means operatively connected to said channel system for supplying said tempering medium;
- said channel system and said blowing means being dimensioned so that when air is said tempering medium the air may flow through said channel system at a velocity of more than 10 m/sec.
Dependencies are inferred from the claim text.