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US 6,139,690 AGranted
Former with a floating upper lip
AssigneeVoith Sulzer Papiermaschinen GmbH
InventorsGunter Halmschlager, Herbert Haunlieb
Life of this patent
Estimating the term…
Abstract
A former with a sieve, preferably with a cylinder mold, is provided with an adjustable discharge aperture for a fibrous material suspension exiting from a chamber that is formed between the sieve and an upper lip formed by a flow guide plate. The upper lip has a first end facing away from the chamber and is guided in a floating manner by a pressure medium in a direction toward the sieve, as well as in the opposite direction. The upper lip is supported in a floating manner also by a pressure medium at its second end facing toward the chamber. In this way, deflections of the upper lip in the region of the inlet aperture can be largely avoided.
Claims22
A former comprising:
- a former roll having a sieve;
- an adjustable discharge aperture for a fibrous material suspension;
- and
- a chamber containing the fibrous material suspension positioned between the sieve and an upper lip formed by a flow guide plate, the fibrous material suspension flowing from the chamber to the discharge aperture;
- the upper lip comprising a discharge end forming the discharge aperture and a second end, the discharge end being adjustably positionable toward and away from the sieve by a pressure medium which exerts a pressure in a vicinity of the discharge end of the upper lip,
- wherein the discharge end of the upper lip is guided in a floating manner by at least two pressure tubes and wherein the second end of the upper lip is adjustable towards and away from the sieve.
3 more elements
A former comprising:
- a former roll having a sieve;
- an adjustable discharge aperture for a fibrous material suspension;
- a chamber containing the fibrous material suspension positioned between the sieve and an upper lip formed by a flow guide plate, the fibrous material suspension flowing from the chamber to the discharge aperture;
- the upper lip comprising a discharge end and a second end and being adjustable toward and away from the sieve by a pressure medium,
- wherein the discharge end of the upper lip facing away from the chamber is guided in a floating manner by at least two pressure tubes, one tube of the two pressure tubes exerting a force toward the sieve when actuated by the pressure medium, and the second of the two pressure tubes exerting an opposing force when actuated by the pressure medium, and
- wherein the second end of the upper lip is adjustable towards and away from the sieve.
3 more elements
A former comprising:
- a former roll having a sieve;
- an adjustable discharge aperture for a fibrous material suspension;
- a chamber containing the fibrous material suspension positioned between the sieve and an upper lip formed by a flow guide plate, the fibrous material suspension flowing from the chamber to the discharge aperture and, wherein the upper lip is adjustable toward and away from the sieve by a pressure medium,
- wherein a first end of the upper lip facing away from the chamber is guided in a floating manner by at least two pressure tubes, one tube of the two pressure tubes exerting a force toward the sieve when actuated by the pressure medium, and the second of the two pressure tubes exerting an opposing force when actuated by the pressure medium;
- and
- a stiffening element having a first end guided by the two pressure tubes and, having a second end rotatable at the swivel axis, the upper lip being attached to the stiffening element.
3 more elements
A former comprising:
- a former roll having a sieve;
- an adjustable discharge aperture for a fibrous material suspension;
- a chamber containing the fibrous material suspension positioned between the sieve and an upper lip formed by a flow guide plate, the fibrous material suspension flowing from the chamber to the discharge aperture and, wherein the upper lip is adjustable toward and away from the sieve by a pressure medium,
- wherein a first end of the upper lip facing away from the chamber is guided in a floating manner by at least two pressure tubes, one tube of the two pressure tubes exerting a force toward the sieve when actuated by the pressure medium, and the second of the two pressure tubes exerting an opposing force when actuated by the pressure medium;
- and
- wherein one of the two pressure tubes is actuated by a constant working pressure, the other pressure tube being actuated by an adjustable working pressure.
3 more elements
A former comprising:
- a former roll having a sieve;
- an adjustable discharge aperture for a fibrous material suspension;
- a chamber containing the fibrous material suspension positioned between the sieve and an upper lip formed by a flow guide plate, the fibrous material suspension flowing from the chamber to the discharge aperture and, wherein the upper lip is adjustable toward and away from the sieve by a pressure medium,
- wherein the upper lip is floatingly supported by a pressure medium at a second end toward the chamber, and
- wherein the upper lip is attached to a stiffening element guided by at least two pressure tubes and supported by a carrier at both a first end, facing away from the chamber, and a second end facing the chamber.
2 more elements
A former comprising:
- a former roll having a sieve;
- an adjustable discharge aperture for a fibrous material suspension;
- a chamber containing the fibrous material suspension positioned between the sieve and an upper lip formed by a flow guide plate, the fibrous material suspension flowing from the chamber to the discharge aperture and, wherein the upper lip is adjustable toward and away from the sieve by a pressure medium,
- wherein the upper lip is floatingly supported by a pressure medium at a second end toward the chamber, and
- wherein the second end of the upper lip is supported by a number of swivel bearings distributed over a width of the former on a cross strut, which is supported by pairs of adjacent pressure tubes on the stiffening element that extend in pockets between the cross strut and the stiffening element on a side facing toward the sieve and in pockets between the cross strut and a support element rigidly connected to the stiffening element on a side facing away from the sieve.
2 more elements
A former comprising:
- a former roll having a sieve;
- an adjustable discharge aperture for a fibrous material suspension;
- a chamber containing the fibrous material suspension positioned between the sieve and an upper lip formed by a flow guide plate, the fibrous material suspension flowing from the chamber to the discharge aperture and, wherein the upper lip is adjustable toward and away from the sieve by a pressure medium;
- and
- a pocket facing toward the sieve for enclosing a pressure tube, the pocket being located between a first end of a stiffening element, which faces away from the chamber, and a strap rigidly attached to a carrier, a second pocket facing away from the sieve enclosing a second pressure tube, the second pocket being located between the carrier and the stiffening element.
2 more elements
Dependencies are inferred from the claim text.