Abstract: Method of producing a paper having a three-dimensional pattern of alternating raised and recessed portions which has been provided in connection with impulse drying, at which the wet paper web (10) is passed through at least one press nip (12) comprising a rotatable roll (13) which is heated and that the paper web during the passage through the press nip is given a three-dimensional pattern of alternating raised and recessed portions either by means of a pattern wire, band or belt and/or by a pattern on the heated roll (13) and where the paper web (10) after said press nip (12) is led around an essential part of the periphery of the heated roll (13) in order to provide an additional drying of the paper web while this is still in contact with said three-dimensional pattern.

Abstract: Device for producing a paper having a three dimensional pattern which has been given the paper web in connection with drying the paper web. The device comprises at least one press nip (12) comprising a rotatable heated roll (13) and a counter means (11,14), at which either the heated roll (13) along its periphery alternatively a member surrounding the roll or a patterned wire, band or belt is provided with said three dimensional pattern, and wherein the wet paper web (10) is intended to pass through said press nip (12) and is given said pattern A detaching roll (16) is arranged at a certain distance from the press nip (12) for taking off the paper web from the heated roll (13), and creping means (17) are arranged for creping the paper from said detaching roll (16).

Abstract: Method of producing paper having a three-dimensional pattern of alternating raised and recessed portions which is given the paper in connection with impulse drying, at which the wet paper web is passed through at least one press nip (12) comprising a rotatable roll (13) which is heated and that the paper web when passing through the press nip is given a three-dimensional pattern either by means of a pattern wire (11) and/or by the fact that the heated roll (13) is provided with a three-dimensional pattern, and where the wet paper web (10) before entering said press nip (12) is given a basis weight variation in a non-random pattern.

Abstract: Method of producing an impulse dried paper having a three-dimensional pattern of alternating raised and recessed portions, which have been provided in connection with impulse drying, at which the wet paper web (10) is passed through at least two press nips (12a,b), each comprising a rotatable heated roll (13a,b) which is heated and that the paper web during the passage through the press nips is given a three-dimensional pattern of alternating raised and recessed portions either by means of a patterned wire (11′), -band or belt and/or by a pattern on the heated roll (13a,b).

Abstract: Method of producing a paper having a three-dimensional pattern of alternating raised and recessed portions which is given the paper in connection with impulse drying. The paper web has a varying material composition as seen in its thickness direction, so that it at least in an outer layer contains an amount of a material that softens, melts or hardens in the temperature interval 100-400° C. or in some other way contributes in stabilizing the pattern structure that has been given the paper. It is further referred to an impulse dried paper produced according to the method.