A system is disclosed for removing fluids from a felt in a paper making process. The system includes a vacuum source for providing a vacuum adjacent a vacuum plate against the felt is moved, and crescent shaped openings in the vacuum plate through which the vacuum is applied to the felt for the removal of the fluids.

A system is disclosed for removing fluids from a felt in a paper making process. The system includes a fluid in a reservoir that is adapted to permit a surface of the fluid to contact an underside of the felt.

The invention relates to a suction device (15) for use in a papermaking machine and being suitable for acting on a wet fibrous web through a permeable fabric (4, 6), e.g. a through-air-drying (TAD)-fabric. The suction device has a fabric-facing surface (18) formed by a plurality of end surfaces of solid elements (21, 22). Channels (24, 25) are defined between the solid elements. The end surface of the final solid element (22) does not lie in the same plane as the end surfaces of the previous solid elements (21). Thereby, a gap A is formed between the fabric (4, 6) and the final solid element (22). This allows air to flow through the gap and into a final channel (25). The air flow will then catch fines, small fibers and water droplets and draw them into the final channel (25) thereby counteracting a build-up of large lumps of fines and fibers.

The invention relates to a suction device (15) for use in a papermaking machine and being suitable for acting on a wet fibrous web through a permeable fabric (4, 6), e.g. a through-air-drying (TAD)-fabric. The suction device has a fabric-facing surface (18) formed by a plurality of end surfaces of solid elements (21, 22). Channels (24, 25) are defined between the solid elements. The end surface of the final solid element (22) does not lie in the same plane as the end surfaces of the previous solid elements (21). Thereby, a gap A is formed between the fabric (4, 6) and the final solid element (22). This allows air to flow through the gap and into a final channel (25). The air flow will then catch fines, small fibers and water droplets and draw them into the final channel (25) thereby counteracting a build-up of large lumps of fines and fibers.

A dewatering box cover including a main body having a leading edge, a trailing edge opposite the leading edge, a first side edge, a second side edge opposite the first side edge, a top surface, and a bottom surface and a plurality of sets of holes formed within the main body. The holes within each set are aligned with one another along an imaginary line that is angled from 30 to 70 relative to horizontal and the holes extend downwards from the top surface of the main body towards the bottom surface of the main body at an angle of 20 to 45 relative to vertical.

A dewatering box cover including a main body having a leading edge, a trailing edge opposite the leading edge, a first edge, a second side edge opposite the first side edge, a top surface, and a bottom surface. A first slot is formed within the main body having a first portion and a second portion angled relative to the first portion so as to form a V-shape. A plurality of second slots are formed within the main body at both sides of the first slot. The second slots and the first and second portions of the first slot extend from the top surface to the bottom surface of the main body at an angle relative to horizontal of 30 to 70 and at an angle relative to vertical of 20 to 45.

The invention relates to a drainage element (1) from plastic and a process for its production, which features at least one opening (3), in which an insert (2) is placed, whereas insert (2) features a harder surface than drainage element (1), whereas insert (2) features at least one locking projection (2h) with locking surface (2c) at is outer circumference, and drainage element (1) in opening (3) features at least one latching surface (1c), which is formed via a recess in the girthed area of opening (3) and insert (2) can be pressed into surface (3), whereas locking surface (2c) of locking projection (2h) of insert (2) enjoins the latching surface (1c) in placed conditions, so that insert (2) is positively secured against pulling out in opening (3) of drainage element (1).

A cover device (10) is disclosed for use in a dewatering shoe or other drainage device of a papermaking machine. The cover device (10) includes a plate (12) of expanded metal which defines a plurality of elongate holes (14, 15, 16, 17, 18, 19, 20 and 21) for the passage therethrough of water as indicated by the arrow (22) removed from a web W disposed on a dewatering screen (24) moving in a machine direction MD relative to the cover device (10). The arrangement is such that the dewatering screen (24) is disposed between the web W and the cover device (10) so that the water (22) is removed from the web W through the dewatering screen (24) and then through the elongate holes (14 to 21).

A dewatering box cover including a main body having a leading edge, a trailing edge opposite the leading edge, a first edge, a second side edge opposite the first side edge, a top surface, and a bottom surface. A first slot is formed within the main body having a first portion and a second portion angled relative to the first portion so as to form a V-shape. A plurality of second slots are formed within the main body at both sides of the first slot. The second slots and the first and second portions of the first slot extend from the top surface to the bottom surface of the main body at an angle relative to horizontal of 30 to 70 and at an angle relative to vertical of 20 to 45.

A dewatering box cover including a main body having a leading edge, a trailing edge opposite the leading edge, a first side edge, a second side edge opposite the first side edge, a top surface, and a bottom surface and a plurality of sets of holes formed within the main body. The holes within each set are aligned with one another along an imaginary line that is angled from 30 to 70 relative to horizontal and the holes extend downwards from the top surface of the main body towards the bottom surface of the main body at an angle of 20 to 45 relative to vertical.