| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 181 | High heat flux roll and press utilizing same | US181100 | 1988-04-13 | US4889048A | 1989-12-26 | Ray R. Miller |
| The disclosure describes a drum or roll which may be heated to high operating temperatures and is particularly useful in situations where a high heat flux is required under conditions of high nip and distributed loads on the drum. It consists of a relatively thin rotating shell supported on an axially located stationary inner core. The core has a plurality of shell support bearings. These have close radial clearances with the inner surface of the shell at each location where an extrnal nip roll would be engaged. The spaces between the shell support bearings form pressurizable chambers. These chambers can be filled with a hot pressurized fluid for supporting the shell between the supports located at the nip positions. In one application the roll would be used as the drum in a belt and drum press having high nip loads at several locations and high distributed loads applied by a tensioned belt. The fluid support system for the rotatable shell enables a very thin shell to be used. This permits the desired heat flux while still maintaining the mechanical integrity to support the applied loads. Operating temperatures of the roll could range up to 800.degree. F. with multiple nip loads typically being up to 1000 to 2000 pounds per linear inch and 100-800 psi unit pressure, and with distributed loads between the nips of up to 50 psi. High thermal conductivity materials such as copper or aluminum may be used as shell material to reduce temperature differential and thermal stress. | ||||||
| 182 | Method and apparatus for compressing a self-supported web | US74000 | 1987-07-16 | US4826555A | 1989-05-02 | Eliot R. Long |
| An apparatus for processing a self-supporting web includes a rotatable mandrel and a stationary block member which defines a recess adjacent the mandrel. The recess is shaped to form a converging chamber between the mandrel and the block member, which converges in the direction of motion of the self-supporting web. A belt is mounted for movement through the chamber and is positioned between the self-supporting web and the block member. The chamber is sized to compress the self-supporting web between the block member and the mandrel, thereby reducing the thickness of the self-supporting web as it passes through the chamber. This apparatus can be used for laminating, liquid removal, or caliper reduction operations on the self-supporting web. | ||||||
| 183 | Arrangement for sealing a chamber containing pressure medium | US136560 | 1987-12-22 | US4787641A | 1988-11-29 | Paavo Rautakorpi; Pekka Majaniemi; Jukka Lehtinen |
| An arrangement for sealing a chamber containing pressure medium against a movable band. The band is arranged to form one side of the chamber. The arrangement comprises a sealing framework which is fastened to a body part of the chamber by means of a resilient membrane. The sealing framework is further provided with a sealing means for providing a sealing effect between the movable band and the rest of the chamber. The sealing means is thereby arranged to be pressed against the band by the pressure effect of a load medium fed on one side of the resilient membrane. In order to obtain an effective and adaptable sealing effect, the means for providing the sealing effect is formed by at least two sealing elements arranged in parallel and between which a sealing liquid is provided. | ||||||
| 184 | Press roll | US017081 | 1987-02-20 | US4782568A | 1988-11-08 | Kyosti Halttula |
| The invention relates to a press roll arranged to interact with a second roll in the wet end of a paper or paper board machine for forming a nip between the rolls. In the press roll a surface is arranged to be pressed against the second roll and is made of an elastic material for extending the nip. In order to provide a simple and versatile structure, the surface made of an elastic material is formed by a separate shell portion which surrounds a body of the press roll and is positioned over its entire length at a distance from the body. The shell portion is supported to be stationary with respect to the body by means of end flanges provided in the ends of the body, so that the shell portion is able to yield over the entire length thereof radially inwards towards the body locally at the nip point. | ||||||
| 185 | Procedure and means in the treatment by pressing of a fibre web, in particular of a paper or cardboard web | US638683 | 1984-08-08 | US4586983A | 1986-05-06 | Jorma Laapotti |
| A pressing method and apparatus for dewatering a fibre web, such as a paper or cardboard web, in a paper machine press section including two press rolls through which the web is conducted carried on either a single fabric or interposed between a pair of fabrics. The web is pre-pressed in a pre-pressing zone located in the throat region between the press rolls. The pre-pressing pressure is applied to the web through the mediation of a substantially impermeable band which passes through the press nip in overlying relationship with the web as the latter is conducted over a sector of one of the press rolls. After the pre-pressing step, the web is immediately conducted through the zone of the press nip, the pressing of the web which takes place in the press nip determining the dry matter content of the web subsequent thereto. The pre-pressing zone immediately precedes the zone of the press nip so that the pre-pressing and nip zones together in combination constitute a pressing zone. The peak pressing pressure present in the press nip zone is greater than the pressure in the preceding pre-pressing zone. | ||||||
| 186 | Method and apparatus for drying a paper, or similar, web | US475839 | 1983-03-16 | US4506457A | 1985-03-26 | Jukka Lehtinen |
| A method and an apparatus for drying a paper, or similar, web so that a wet web and a drying felt or wire are subjected to an air removal treatment, the web and the felt or wire freed of air are passed between moving surface elements having good heat conducting properties, said elements enclosing the web and the felt or wire along the whole width, the surface element contacting the web is heated in order to evaporate water contained in the web, and the surface element contacting the felt or wire is cooled in order to condense vapor emanating from the web into the felt or wire, and the felt or wire are separated from the dried web. The drying is carried out in two successive stages, and the surface elements are grouped so that each surface of the web at least in one stage comes into contact with the heated smooth surface element and in at least one further stage into contact with the drying felt or wire in order to distribute equally the markings caused by the drying felt or wire on the two surfaces of the web. | ||||||
| 187 | Method for drying a porous web in an extended nip press | US475840 | 1983-03-16 | US4506456A | 1985-03-26 | Jukka Lehtinen |
| A method for drying a porous web, according to which method the wet web is passed onto at least one drying felt, the web and the drying felt are subjected to an air removal treatment, and the web and the drying felt are passed between two surface elements which are impermeable to liquid and form an extended press zone in which the web is subjected to a pressing effect from both sides. Before the press zone the wet web is heated to a temperature of at least nearly 100.degree. C., and in the press zone the drying felt is kept at a temperature lower than the temperature of the wet web, so that a lower pressure is produced in the drying felt, and the high temperature of the water in the web causes an explosive evaporation and transfer of water from the web into the felt. | ||||||
| 188 | Extended nip press for a paper machine | US501242 | 1983-06-06 | US4484982A | 1984-11-27 | Pekka Majaniemi |
| An extended nip press for a paper machine for removing water from a wet fibrous or porous web. The press comprises two parallel, rotating press rolls which are pressed against each other and form therebetween a press nip through which a web to be dried passes together with at least one drier felt. At least one of the press rolls is provided with a hard support cylinder and a flexibly compressible shell layer surrounding said cylinder so that the press nip forms an extended press zone. In order to equalize the pressure and the temperature in the press zone, the shell layer is provided with a flexible layer formed by at least one liquid-filled cavity and a gas-filled cell disposed in the cavity, said flexible layer surrounding the support cylinder at least corresponding to the width of the web. | ||||||
| 189 | Paper machine press with a wide pressing zone | US378019 | 1982-05-13 | US4464226A | 1984-08-07 | Mikko Karvinen |
| A dewatering press section for a paper or cardboard web includes a press roll having a wide pressing zone over which a belt is provided to run guided by guide rollers with the web being arranged to run in the pressing zone in compression between the press roll and the belt. At least one fabric runs in the pressing zone and acts on a respective face of the web. A pressure transmitting device has a surface which overlies the belt substantially in the pressing zone. According to the invention, ultrasonic field generators are provided in association with the pressure transmitting device surface for applying an ultrasonic field substantially in the pressing zone such that the friction between the surface of the pressure transmitting device and the belt is substantially reduced. The ultrasonic field generators can operate at a single frequency, at a plurality of discrete frequencies or may emit a continuous spectrum of frequencies and the intensity of the ultrasonic field is selected such that in addition to reducing the friction between the belt and the surface of the pressure transmitting device, the ultrasonic field will also substantially promote the removal of water from the web within the pressing zone as well as the transfer of water removed from the web into the press fabric or fabrics. | ||||||
| 190 | Apparatus for pressure treatment of a moving web | US360583 | 1982-03-22 | US4431045A | 1984-02-14 | Lars G. Josefsson |
| An apparatus pressure treats a moving web by pressing the web against a surface. The apparatus comprises a continuous link chain and a chain support. The chain support supports a moving length of the chain close to the surface so the length of chain has a shape complementary to the shape of the surface. A length of web moving with the chain is pressed between the chain and the surface. | ||||||
| 191 | Method of influencing a pre-drained fibrous web on a screen | US208406 | 1980-11-19 | US4370200A | 1983-01-25 | Sylvia Schmidt; Hansdieter Eckert; Wolfgang Holzinger; Dietrich Holle |
| A method and apparatus are disclosed for influencing the fibers in the uppermost layer of a fibrous web lying on a screen, for example, in applying a watermark or evening the surface of the web, wherein a surface compression is exerted on the web by a screen roller and a second screen guided around the screen roller. The surface compression is maintained over a variable time period and causes a water film to appear on the upper surface of the web, in which the fiber density is much less than in the web prior to the surface compression. This water layer is forcibly aspirated from the web and the fibers therein thus experience a reorientation and become set in desired positions. | ||||||
| 192 | Belt press with rotatable cylinder and adjustable pressure member | US446969 | 1974-02-28 | US3974026A | 1976-08-10 | Stephen Derek Emson; Christopher Stephen Norton; James Royston Wilson |
| The belt press is constructed with a rotatable cylinder, a guide belt to confine the material between the belt and cylinder, and a press member for pressing the belt towards the cylinder to remove water from the confined material. The press member has a curved face slightly spaced from the belt as well as a pressure chamber which delivers a pressurized medium, such as water or air, against the belt over the face of the press member. | ||||||
| 193 | Controlled sequence pressure nip | US565427 | 1975-04-07 | US3970515A | 1976-07-20 | Leroy H. Busker |
| A press structure for performing a dewatering operation in the steps of formation of a traveling fibrous web such as in a paper making machine wherein the wet web is carried on one or more water absorbing felts through a press formed of a pair of extremely tough liquid impervious belts with the belts backed throughout a pressing zone by a series of fluid pressure chambers applying hydraulic pressures to the back of the belt. The chambers are arranged so that a first fluid pressure is applied at a first portion of the pressing zone, and subsequently a second higher pressure is applied to the belts at a second portion of the pressing zone and thereafter a third pressure is applied at a third portion. Each successive pressure is higher than the previous one so that the hydraulic resistance pressure of the moisture leaving the web does not build up at such a rate so as to disrupt the web fibers. | ||||||
| 194 | Wedge press for continuous dehydration of a web of fibrous material, such as fiberboard, especially | US46767274 | 1974-05-07 | US3929065A | 1975-12-30 | CSORDAS ELEMER; GAUGENMAIER KARL; KOTITSCHKE GERHARD |
| Device for continuous dehydration of a web of fibrous material including two pressure plates pervious to water and mutually disposed so as to form a wedge-shaped gap therebetween, the wedge angle of the gap and the mutual spacing of the pressure plates being adjustable, and a water-permeable belt looped around the pressure plates respectively, one of the pressure plates having a portion projecting beyond the other pressure plate at the narrow end of the wedge-shaped gap, suction chamber means located at least at the projecting portion and at a region of the one pressure plate immediately preceding the projecting portion in direction of feed of a web of fibrous material through the wedgeshaped gap from the wide to the narrow end thereof, the other pressure plate being formed with perforations.
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| 195 | Large roll hydraulic press with pressurized fluid supports | US24463872 | 1972-04-17 | US3853698A | 1974-12-10 | MOHR W |
| A press structure performs a dewatering operation on a traveling web such as that received from the forming section of a paper making machine. The press structure includes an elongate rotatable roll with a cylindrical outer pressing surface and an endless looped belt wrapping a portion of the circumference of the roll and forming an arcuate elongate pressing zone with the roll, with a felt passed along in the pressing zone to receive water pressed from the web, and a sealed fluid pressure chamber opposite the belt along the pressing zone applying a pressure to the web with the pressure chamber carrying seals to prevent the leakage of fluid as the belt passes therealong.
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| 196 | Extended fibrous web press nip structure with contoured leading and trailing sills | US23065072 | 1972-03-01 | US3808092A | 1974-04-30 | BUSKER L |
| A press structure and method for pressing a traveling fibrous web such as a web of paper received from the forming section of a paper machine including a pair of looped traveling impervious belts which come together in a pressing zone and pass the fibrous paper web through the pressing zone against a traveling felt. The belts are urged toward each other by fluid pressure chambers outwardly of the belts and the chambers have side walls which are sealed to the belt at their edges, and the side walls have a leading sill on the oncoming side and a trailing sill on the offrunning side with the leading sill contoured to provide a gradual increase in pressure over a period of time to avoid crushing of the fibers and with a trailing sill on the offrunning side which is short and flat to obtain a sudden drop of pressure at the end of the pressing zone.
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| 197 | Papermaking press with inflatable rolls having thin deformable outer shells | US23282072 | 1972-03-08 | US3804707A | 1974-04-16 | MOHR W; FRANCIK C |
| An extended nip is created in a papermaking roll press assembly whereby the rolls are provided with thin, deformable outer shells and fixed, rigid seal plates in the ends of the shells for holding pressurized fluid within the shells. Separately inflatable annular seals provided between the fixed, end seal plates and the shells also help prevent escape of fluid from within the shells. Support beams extending the length of the roll shells opposite the nip have perforations therein for allowing fluid to pass between the beams and the rotating outer shells of the rolls for reducing sliding friction.
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| 198 | Fibrous web press nip structure including nonporous belts backed by pistons supported with fluid pressure | US3748225D | 1970-11-19 | US3748225A | 1973-07-24 | BUSKER L; FRANCIK C |
| An extended nip press device for removing fluids from a fibrous web and including a pair of endless looped non-porous belts positioned to define a nip of at least 6 inches in length. A porous belt or felt is positioned to pass through the nip and is used as a web carrying device. The pressure exerted in the nip is caused by a piston positioned inside the loop of each of the nonporous belts having a force transmitting surface contacting the nonporous belts substantially across the width and length of the nip. Lubrication lines are provided for each piston so as to lubricate the surface contacting the nonporous belt. Deflection control structure defining a fluid reservoir and positioned to accept one of the pistons in each reservoir is further provided, and includes feed lines for supplying fluid to the reservoir in an amount sufficient to support the piston in the reservoir. Force supplied by the piston on the nonporous belt is balanced by the deflection control structure so as to prevent deflection of the piston.
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| 199 | Pneumatic press roll for paper machines | US73357924 | 1924-08-22 | US1563130A | 1925-11-24 | WESTON MILTON T |
| 200 | Machine for making fibrous composition | US58864522 | 1922-09-16 | US1532660A | 1925-04-07 | PATTERSON IAN D |
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