US 10,094,067 B2Granted

Production line for producing fiber webs and a cooler

AssigneeValmet Technologies Oy

InventorsTapio Pitkäniemi, Mika Vijanmaa, Jari Ilomäki

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Abstract

A cooler (144) providing gas blows and comprising at least one cooler module having at least one cooler module (41, 42, 43, 44) of the cooler (144) is curved to provide a gas turn module for turning run of the fiber web (W) from its main running direction 80-190°. The cooler (144) includes moisturizing at least one surface of the fiber web. Having a blowing zone (45, 46, 53) in which gas is blown toward a surface of the fiber web and that the cooler comprises at least one suction zone (51), in which the fiber web evaporated moisture is drawn away from the proximity of a surface of the fiber web. There are cooler modules on both sides of the fiber web. The cooler has a gas turn module located inside a curved fiber web run, which provides gas blows toward the curved fiber web during the run.

Claims8

Dependent claims

A fiber web cooler, for a fiber web, the fiber web defining a cross machine direction perpendicular to a travel direction of the web, and width in the cross machine direction, and first and second opposed sides, and a first fiber web temperature before entering the fiber web cooler, comprising:

a first cooler module, a second cooler module positioned opposite each other;
a third cooler module positioned between and below, or between and above, the first cooler module and the second cooler module;
wherein the third cooler module is positioned in fiber web receiving relation to the first cooler module, and the third cooler module is positioned in fiber web transmitting relation to the second cooler module;
therein the third cooler module forms a gas turn module having a curved surface extending through a wrap angle of 80-190°, which curved surface is a non-contact surface with respect to the web, and the third cooler module has gas blows connected to a source of dry gas at a temperature less than the first fiber web temperature, directed at the fiber web on the curved non-contact surface as the fiber web traverses the angle of 80-190°.

1 more element

Dependencies are inferred from the claim text.