The invention relates to an assembly for positioning a heater in relation to a roll, wherein the roll (101) has a substantially cylindrical shape with a shall surface (103), rotatable around a shell axis (102), at a first distance (104) from the shell axis (102). The heater (105) comprises at least one heater section (106, 106', 106") intended for heating the shell surface (103), and is supported via a suspension attachment (107) by means of a supporting means (108) on a variable, second distance (109) from the shell axis (102). Thereby, the heater section (106, 106', 106") is furnished with at least one distance control means (110, 110') arranged for being in contact with the shell surface (103) during the heating and for automatically regulating the second distance (109) by means of a self-regulating mechanism. The invention further relates to a press device with such an assembly, and is particularly advantageously implemented in connection with impulse pressing of paper webs in so called shoe presses having an extended nip, but can also be implemented for other types of heated rolls in a paper machine.
CROSS-REFERENCE TO RELATED APPLICATION
This application claims the benefit of U.S. Provisional Patent Application Ser. No. 60/133,590 filed May 11, 1999 and Swedish Appl. No. 9901614-9 filed May 5, 1999
A blanket cylinder has a rotational axis and a concave surface, concentric to the axis and extending over a printing width of the cylinder, for receiving a flat rubber blanket made of elastically deformable material. The cylinder has a recess concentric to the axis, extending over the printing width, and a film fitted in the recess The film has an outside surface which forms the concave surface of the blanket cylinder.
