Importance

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Abstract

A method for the moistening of an endless web moving in a processing device, wherein the moistening substance is an evaporated fluid condensated on the web and said web is treated with a corresponding steam substance prior to this moistening. The method includes steps for supplying the evaporated fluid in a bag-like member formed by the web, the bag-like member being supported by an external member. The supply of the substance is carried out by means of a steamer appliance arranged transverse to the web. The method includes steps for adjusting the specific property of the steam substance in accordance to specific values measured from the web. The steamer appliance for the substance supply is separated from the external web support, the adjusted specific property being the steam current or the total amount of the steam and being distributed between separate zones in the web transverse direction, whereby the distribution is controlled by means of the ratio of the measured local specific value corresponding the zones. The method includes the generation of a pressure difference between the interior of the bag-like member and the space outside the web. The measurement of the specific value is continuously carried out in the transverse direction of the web.

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First Claim