Method and device in a paper or board machine line

A method of treating a web having a width in a crossmachine direction, in a papemaking machine drying line employed after a wire section, the method comprising the steps of:

• dewatering a web supported by a fabric or drying wire, and within the dewatering step increasing the crossmachine direction width of the web by applying a strain of a selected magnitude to an edge of the web to cause an increase in crossmachine direction width in a portion of the web while the web is supported by a fabric or drying wire;
• wherein the strain is applied between the edge of the web and a selected position on the web spaced toward a centerline of the web, which selected position is held against strain directed toward the edge of the web;
• and
• wherein the strain is applied by at least one device located at one end of a rotating device over which the web travels.

An apparatus in a paper or board machine line positioned after a wire section, the apparatus comprising:

• a web supported on top of a fabric or drying wire, the web having a first edge and a second edge, the web underlain by the fabric or drying wire, and wrapped axially about a selected angle of a rotating device mounted for rotation about an axis, the rotating device having a first end part, and a second end part;
• at least one device located in connection with the first end part of the rotating device the at least one device arranged so that the web increases in width as it extends about the at least one device the selected angle, wherein the web first edge is fixed to the at least one device, such that rotation of the at least one device will apply strain to the first edge of the web increasing a portion of the web's width;
• and
• means for holding the web to the rotating device so that strain in the web is limited to a selected portion of the web.