Abstract:
A paper making machine for the production of a fiber material web includes a drying cylinder, first and second bearing assemblies, a fixed rigid support, a fixed structure and a flexible device. The drying cylinder has two longitudinal ends, a longitudinal axis and at least one fluid passage for receiving heated fluid. Each bearing assembly is attached to and rotatably carries a respective longitudinal end of the drying cylinder. The fixed rigid support substantially immovably supports the second bearing assembly. The flexible device allows for longitudinal thermal expansion of the drying cylinder in a direction substantially parallel to the longitudinal axis of the drying cylinder. The flexible device carries the first bearing assembly and interconnects the first bearing assembly to the fixed structure.
Abstract:
The invention is directed to a paper machine for making or processing a paper web. The paper machine includes a roll for carrying the paper web; and a hydraulic cylinder assembly connected to the roll for moving the roll. The hydraulic cylinder assembly includes a cylinder defining a chamber, a piston disposed within the cylinder, and a piston rod connected to the piston and extending from the cylinder. The hydraulic cylinder assembly further includes a bushing connected to the cylinder and disposed around the piston rod. The bushing slidably engages the piston rod and substantially seals the cylinder chamber from the ambient environment. The bushing is formed from a non-metallic material having a tensile strength of between approximately 6500 and 12500 psi at a temperature of approximately 73.degree. F., a coefficient of friction of between approximately 0.10 and 0.30, and a maximum continuous operating temperature of approximately 550.degree. F.
Abstract:
The invention is directed to a shoe press for removing water from a traveling fiber web. The shoe press includes a planar backing surface, and a shoe assembly disposed adjacent to the backing surface. The shoe assembly and the backing surface form a press nip therebetween extending in a running direction of the traveling fiber web. Four felts extend through the press nip and carries the fiber web through the press nip. The shoe assembly includes a plurality of shoes disposed adjacent to each other in the running direction of the fiber web, with each shoe being configured to apply a selected and independent compressive force against the at least one felt and the fiber web.
Abstract:
The front wall and support arrangement is shaped as a stiff support structure extending across the entire machine width above a slice chamber. The support structure is deformed due to its inherent weight and because of the pressures and temperatures prevailing in the slice chamber. To counteract these deformation effects the support structure is supported by a support carrier of about the same length as the support structure. To attain a substantially lower structural height, the support carrier is arranged relative to the support structure such that an intermediate space prevails between the lower wall of the support structure and the support carrier. This intermediate space accommodates force-generating support elements. Each of the force-generating support elements is provided for only a portion of the surface or area to be supported in the intermediate space. In a preferred embodiment the support structure is a box-like girder equipped with an upright positioned I-profile constituting the support carrier and arranged within the interior space of the box-like girder. Advantageously, the support elements are elastic tubes closed at both ends and extending substantially parallel to the longitudinal axis of the front wall, and the individual elastic tubes are each connected to at least one pressure source.
Abstract:
Described herein is a new concept in air dried tissue (ADT). The wet tissue web is received from the wet end of a papermaking machine and dried by an air floatation dryer that uses an endless loop to transport and support the wet tissue web as it is dried.
Abstract:
Described herein is a new concept in air dried tissue (ADT). The wet tissue web is received from the wet end of a papermaking machine and dried by an air floatation dryer that uses an endless loop to transport and support the wet tissue web as it is dried.
Abstract:
A press assembly for use in a paper-making machine includes a roll, a first air press backing assembly and a second air press backing assembly. The first air press backing assembly and the second air press backing assembly each include an inner wall, an outer support structure and a plurality of inflatable hoses interposed between the inner wall and the outer support structure. The inner wall is positioned adjacent to and defines an air chamber with the roll.
Abstract:
A paper-making machine includes at least one roll for carrying a fiber web or a belt. At least one of the rolls includes a shell formed from a composite material; a journal comprised of metal; and a head interposed between and interconnecting the shell and the journal. The head is also formed from a composite material.
Abstract:
A wet end of a paper-making machine, including a headbox with a chamber and a discharge nozzle. A turbulence generator is connected with the headbox and includes a plurality of fluid passages disposed substantially parallel to each other. Each fluid passage is in fluid communication with the headbox chamber and has an inlet. All of the inlets conjunctively define a fluid inlet area. A fiber stock delivery device includes at least one outlet, with all of the outlets conjunctively defining a fluid discharge area. Each outlet is configured to discharge the fiber stock in a direction substantially parallel to the fluid passages in the turbulence generator. The fluid discharge area of the fiber stock delivery device is smaller than the fluid inlet area of the turbulence generator. A hydraulic increaser interconnects the fluid discharge area of the fiber stock delivery device with the fluid inlet area of the turbulence generator. The hydraulic increaser includes at least two interior abutting surfaces, with each abutting surface having at least one end defining an adjoining edge with another said abutting surface. Each abutting surface defines a line at each end which is disposed tangent to the abutting surface at the respective end. Each tangent line defines an acute angle with a tangent line of an adjacent abutting surface which is between approximately 1.degree. and 10.degree. preferably not greater than approximately 4.degree..
Abstract:
A paper-making machine for making a paper web from a fiber suspension includes a headbox having a plurality of walls defining a chamber, and an inlet connected to at least one of the walls and disposed in fluid communication with the chamber. The inlet is configured to receive the fiber suspension. The headbox also has a discharge nozzle disposed in fluid communication with the chamber. The discharge nozzle defines an outlet from which the fiber suspension is discharged. The headbox also includes a sonic transducer, associated with the discharge nozzle, for transmitting sonic energy into the fiber suspension within the discharge nozzle and thereby substantially deflocculating the fiber suspension within the discharge nozzle.