Asea Brown Boveri Inc.

Ian Gerald Lang

David Gamble

A method and apparatus for correcting the curl in drying and dried paper is presented wherein high velocity hoods are used in combination with drying cylinders. In addition, the use of impingement drying hoods provide a means to correct for variations in the moisture profile of the paper. High velocity hoods can be located in the drying section of a paper machine to compensate for uneven drying by paper cylinders.

Curl and profile correction with high velocity hoods

A drying cylinder comprises a cylindrical shell with head members at either end and is mounted for rotation about its central longitudinal axis. A gas fired burner assembly is mounted in the interior of the cylinder and comprises a plurality of burner segments which transmit heat to the shell by infrared radiation. The heat output of the burner segments are controllable as an assembly in unison or individually.

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Dewittville, Canada

Ian Gerald Lang