A dewatering roll (10) comprises a roll body (20), a mantle support structure (30) and a mantle (40). The mantle support structure (30) is attached around the roll body (20). The mantle (40) is attached against an outer surface (36) of the mantle support structure (30). The mantle (40) has a plurality of through holes (42) constituting mantle flow paths (44). The mantle support structure (30) presents support flow paths (38) from the outer surface (36) of the mantle support structure (30). The support flow paths (38) are in fluid contact with the mantle flow paths (44). The outer surface (36) of the mantle support structure (30) has a static geometric shape defining an envelope having a smaller radius in vicinity of each axial end (15) than in vicinity of a center (16). Thereby, the inner surface (48) of the mantle (44) assumes the shape of the envelope.

A cylindrical polymeric cover for an industrial roll includes a plurality of through holes and a plurality of blind drilled holes. The through holes and the blind drilled holes are arranged in a pattern in which: (a) the through holes are arranged in rows that define an oblique angle relative to a plane that is perpendicular to a longitudinal axis of the cover; (b) the through holes of one row are offset from the through holes of the adjacent row, with the offset between rows defining an angle of approximately 20-40 degrees; (c) the blind drilled holes are arranged in rows located between the rows of through holes; (d) the blind drilled holes of one row are offset slightly from the blind drilled holes of the adjacent row, with the offset between rows defining an angle similar to that defined by the through holes; and (e) each of the blind drilled holes is located at the substantial center of a triangle defined by the closest three through holes.

A cylindrical polymeric cover for an industrial roll includes a plurality of through holes and a plurality of blind drilled holes. The through holes and the blind drilled holes are arranged in a pattern in which: (a) the through holes are arranged in rows that define an oblique angle relative to a plane that is perpendicular to a longitudinal axis of the cover; (b) the through holes of one row are offset from the through holes of the adjacent row, with the offset between rows defining an angle of approximately 20-40 degrees; (c) the blind drilled holes are arranged in rows located between the rows of through holes; (d) the blind drilled holes of one row are offset slightly from the blind drilled holes of the adjacent row, with the offset between rows defining an angle similar to that defined by the through holes; and (e) each of the blind drilled holes is located at the substantial center of a triangle defined by the closest three through holes.

A roll for molding a fibrous sheet. The roll includes a cylindrical shell and a vacuum box. The cylindrical shell is configured to be rotatably driven and is permeable to allow air to be moved through the cylindrical shell. The cylindrical shell has a permeable patterned surface on an exterior surface of the cylindrical shell. The permeable patterned surface has at least one of a plurality of recesses and a plurality of projections. The density of the at least one of the plurality of recesses and the plurality of projections is greater than about fifty per square inch. The vacuum box is positioned on the inside of the cylindrical shell and is configured to draw air from the exterior surface of the cylindrical shell to an interior surface of the cylindrical shell. The vacuum box is stationary with respect to the rotation of the cylindrical shell.

Sealing strip holder for suction rolls used for dewatering of sheeting e.g. for paper machines comprises a roll shell with openings and disposed within at least one suction box and methods of using the same.

Sealing strip holder for suction rolls used for dewatering of sheeting e.g. for paper machines comprises a roll shell with openings and disposed within at least one suction box and methods of using the same.

Sealing strip holder for suction rolls used for dewatering of sheeting e.g. for paper machines comprises a roll shell with openings and disposed within at least one suction box.

Sealing strip holder for suction rolls used for dewatering of sheeting e.g. for paper machines comprises a roll shell with openings and disposed within at least one suction box.

The invention relates to a press for a machine for producing a fibrous material web, including at least one press nip formed between a press roller and a counter press roller of the press for guiding through the fibrous material web in a dehydrating manner, and two band shaped covers, which are each guided by multiple guide rollers in continuous circulation, so as to run together through the press nip, so that the fibrous material web is guided through sandwiched between said covers, and then separated again at a separation point, in order to continue guiding the fibrous material web on the one cover and separate it from the other cover. One guide roller of the guide rollers arranged at the separation point is a suctioned guide roller of the one cover, to hold the fibrous material web on the one cover at the separation position.

The invention relates to a press for a machine for producing a fibrous material web, including at least one press nip formed between a press roller and a counter press roller of the press for guiding through the fibrous material web in a dehydrating manner, and two band shaped covers, which are each guided by multiple guide rollers in continuous circulation, so as to run together through the press nip, so that the fibrous material web is guided through sandwiched between said covers, and then separated again at a separation point, in order to continue guiding the fibrous material web on the one cover and separate it from the other cover. One guide roller of the guide rollers arranged at the separation point is a suctioned guide roller of the one cover, to hold the fibrous material web on the one cover at the separation position.