Method and apparatus for producing a fiber web
AssigneeTeknologian tutkimuskeskus VTT Oy
InventorsRiku Pihko, Jani Lehmonen, Kay Rökman
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Abstract
An apparatus and a method which heat an elongated product in at least two pulses including at least one first pulse wherein the product is pressed for at least 10 ms on a first pressure and at least one second heating and smoothing pulse wherein the product is pressed and/or heated at least for 10 ms on a pressure that is higher than the first pressure. The heating elements being arranged to heat the elongated product so that the heating the heating temperature is at least 80° C. on at least one surface of the elongated product.
Claims19
An apparatus for removing water from an elongated product formed of fibers and water, comprising:
- heating elements and pressing elements for heating the elongated product in at least two pulses including at least one first pulse wherein the elongated product is pressed and heated for at least 10 milliseconds on a first pressure and at least one second heating and smoothing pulse wherein the elongated product is pressed and/or heated at least for 10 milliseconds on a pressure that is higher than the first pressure, and
- the heating elements are arranged to heat the elongated product so that the heating temperature is at least 80° C. on at least one surface of the elongated product.
A method for removing water from an elongated product formed of fibers and water, comprising:
- a pressing and heating step for removing water from the elongated product;
- wherein
- the elongated product is pressed and heated by heating elements in at least two pulses including at least one pressing pulse wherein the product is pressed for at least 10 milliseconds on a first pressure and at least one second heating and smoothing pulse wherein the product is heated and/or pressed at least for 10 milliseconds on a pressure that is higher than the first pressure, and
- the elongated product is heated so that the heating temperature is at least 80° C. on at least one surface of the elongated product.
Dependencies are inferred from the claim text.