Metso Paper Inc.

Valmet Corporation

Valmet Paper Machinery Inc.

Timo Pirinen

Ville Korhonen

Pekka Koivukunnas

Juhani Niskanen

Ilkka Eskelinen

Jukka Samppala

Risto Turunen

Risto Haiko

Erkki Hietamäki

Markku Salo

Jorma Ramstedt

Juha Honkala

Pekka Petrilä

Esa Rajala

Mikko Kauppinen

Sampo Vörgren

Reijo Koivuranta

Kauno Kujala

A dewatering arrangement in the press section of a web-forming machine having a press suction roll () and a press fabric () arranged to run via the press suction roll (). The dewatering arrangement has a saveall (), which is installed in conjunction with the press suction roll (), and drainage facilities () for removing the collected water from the saveall (). The saveall () has a concave guide surface () which in the cross direction is located on a partial distance of the circumference of the press suction roll () and at a distance from the surface of the press suction roll () in order to accomplish a vacuum effect and to hence remove water from the press suction roll ().

Dewatering arrangement on the press section of a web-forming machine

A method and arrangement in doctoring in a paper or board machine is disclosed in which the web travels through at least one press nip, in which the press nip is formed by at least a press roll and its backing roll and in which at least one roll is doctored using at least one doctor device. The press roll is doctored essentially over the width of the web.

Method and arrangement in doctoring in a paper or board machine

A calender for a web including a calender frame and a stack of rolls mounted on the frame and consisting of four rolls arranged one above the other. In the stack, adjacent rolls placed one above the other are arrangeable in nip-defining relationship with one another so as to calender the web in the nips. The stack of rolls in the calender is composed of three variable-crown rolls, of which rolls the roll mantle of at least one roll is displaceable in relation to its roll axle in the direction of the nip plane by loading devices arranged inside the roll, and one heatable roll arranged between two variable-crown rolls. The rolls are preferably arranged vertically so that the two lowest rolls and the uppermost roll are variable-crown rolls and that the third roll from the bottom of the stack is a heatable roll.

Mounting arrangement for calendar rolls in a calender

A calender in a paper or board machine comprises a calender frame, at least two soft-faced rolls mounted on the calender frame and at least one hard roll mounted on the calender frame in a manner that allows the hard roll to be displaced between a first position in which it forms calendering nips with the two soft-faced rolls and a second position in which it is spaced from the soft-faced rolls. During threading of the web; while the calender is in operation, the hard roll is shifted to its second position, the web is passed over the soft-faced rolls, and the hard roll is shifted back to its first position and brings the web into the nips between the hard roll and the soft-faced rolls.

Calender with pivotally displaceable roll

Growing community of inventors

Palokka, Finland

Timo Pirinen