| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 201 | Process and device for producing a fibrous material web | US09621654 | 2000-07-21 | US06488810B1 | 2002-12-03 | Günter Halmschlager |
| Process and apparatus for influencing web characteristic in a machine for producing a fibrous web. The process includes guiding the fibrous material web in a still-wet state and stretching the still-wet state fibrous material web in a crosswise direction. The apparatus includes a stretching device arranged to stretch the fibrous material web in a still-wet state in a direction crosswise to a travel direction. | ||||||
| 202 | Former-press section in a paper machine and method for transfer of the web from the former to the press section | US09743080 | 2001-01-02 | US06432273B1 | 2002-08-13 | Petter Honkalampi; Jorma Laapotti |
| The invention relates to a former-press section (100, 110) of a paper machine and to a method of transferring a web from a former to a press section. Between the former section (100) and the press section (110) there is a pre-press zone (PP) which removes water from the web (W) and through which the web (W) is passed as a closed draw from the former section (100) to the press section (110). The upper wet wire (10) or the equivalent transfer wire (10A) of the former section (100) is passed through the pre-press zone (PP), the web (W) being passed on the lower face of said wire into and through the pre-press zone (PP). Inside the loop of the upper wet wire (10) or of the equivalent transfer wire (10A) and/or inside the loop of the lower wet wire (20) there are transfer devices (15, 15a, 16, 26) based on the use of a pressure difference. The transfer devices (15, 15a, 16, 26) are arranged to operate in connection with threading or an operational malfunction such that the web (W) is separated from the upper wet wire (10) or the equivalent transfer wire. | ||||||
| 203 | Air knife assisted sheet transfer | US09560254 | 2000-04-26 | US06361654B1 | 2002-03-26 | Strong C. Chuang; Peter J. Allen |
| A system and method for transferring a nonwoven web in a wet papermaking process to a fabric is disclosed. The system includes a vacuum shoe that operates in conjunction with a transfer shoe. The vacuum shoe is contacted against a carrier fabric which is designed to receive the nonwoven web. The transfer shoe, on the other hand, is configured to contact a transfer fabric from which the web is transferred. The transfer shoe includes an air nozzle which contacts the nonwoven web with a pressurized gas as the web is drawn towards the vacuum shoe. The system of the present invention is particularly well suited to processing lower basis weight webs and can be used in rush transfer processes. | ||||||
| 204 | Method and device in a paper machine for transfer of the web from the former section to the press section | US09782328 | 2001-02-13 | US20010004007A1 | 2001-06-21 | Janne Puustinen; Samppa Salminen; Pertti Heikkila; Ari Puurtinen; Antti Poikolainen; Jorma Laapotti; Mika Viertola |
| A method in a paper machine for transferring a paper web from a wet wire in a former section to a pick-up fabric or an equivalent transfer fabric of a press section, including the steps of forming a pick-up point on the wet wire and separating an edge strip from at least one edge of the web prior to the pick-up point by means of at least one cutting device. The method further includes separating the web from the wet wire and passing the web onto the pick-up fabric at the pick-up point. The method also includes applying a pressure difference to the at least one edge strip through the wet wire or the pick-up fabric at or after the pick-up point to cause the at least one edge strip to either follow the wet wire or become separated from the pick-up fabric after the pick-up point and to be placed in a broke system arranged beneath the paper machine. | ||||||
| 205 | Method and device in a paper machine for transfer of the web from the former section to the press section | US09375220 | 1999-08-16 | US06214168B1 | 2001-04-10 | Janne Puustinen; Samppa Salminen; Pertti Heikkilä; Ari Puurtinen; Antti Poikolainen; Jorma Laapotti; Mika Viertola |
| A method in a paper machine for transferring a paper web from a wet wire in a former section to a pick-up fabric or an equivalent transfer fabric of a press section, including the steps of forming a pick-up point on the wet wire and separating an edge strip from at least one edge of the web prior to the pick-up point by means of at least one cutting device. The method further includes separating the web from the wet wire and passing the web onto the pick-up fabric at the pick-up point. The method also includes applying a pressure difference to the at least one edge strip through the wet wire or the pick-up fabric at or after the pick-up point to cause the at least one edge strip to either follow the wet wire or become separated from the pick-up fabric after the pick-up point and to be placed in a broke system arranged beneath the paper machine. | ||||||
| 206 | Press section | US14971 | 1998-01-28 | US6090244A | 2000-07-18 | Gerhard Kotitschke |
| Press section of a machine for manufacturing a fibrous pulp web. The press section includes at least one press nip for draining the fibrous pulp web and at least one continuous press felt positioned on each side of the fibrous pulp web. The at least one continuous press felts may be guided through the press nip. The press section also includes a transfer roll that transfers the fibrous pulp web from a belt of a prepositioned unit to one of the at least one continuous press felts and a suctioned guide roll arranged within a loop of the one continuous press felt and between the transfer roll and the press nip. The suctioned guide roll is adjustably positionable so that the at least one continuous press felt positioned opposite the one continuous press felt is at least tangential to the suctioned guide roll, and adjustable positioning of the suctioned guide roll adjusts/an intake angle of the web into the press nip. | ||||||
| 207 | Method and arrangement in a web former for preventing rewetting of a web | US68145 | 1998-05-04 | US06071381A | 2000-06-06 | Antti Leinonen |
| The invention relates to a method for preventing rewetting of a web in a former. Water is removed from the web (W) by means of dewatering members. The web (W) is formed by forming members and forming rolls on support of a wire loop/loops. The wire loop/loops (10) is/are guided by alignment, guide and/or suction rolls (11, 12). The web (W) supported by a wire (10) is passed by at least two vacuum boxes/chambers (16, 17) after the last suction roll (11). At least two vacuum boxes/chambers (16, 17) are fitted after the last suction roll (11). The web (W) and the wire (10) are arranged to be dewatered by means of a first vacuum box/chamber (16). The transport of moisture from the wire (10) back into the web (W) is prevented by means of a second vacuum box/chamber (17), and a vacuum (P.sub.1) in the first vacuum box/chamber (16) is higher than a vacuum (P.sub.2) in the second vacuum box/chamber (17). | ||||||
| 208 | Vacuum apparatus for having textured clothing for controlling rate of application of vacuum pressure in a through air drying papermaking process | US706919 | 1996-09-03 | US5885421A | 1999-03-23 | Donald Eugene Ensign; Paul Dennis Trokhan; Daniel Edward Buenger; Peter Graves Ayers |
| A papermaking vacuum apparatus having a web-facing surface adapted to support a papermaking belt and comprising a head, a body and at least one vacuum slot disposed in the head and defining an aperture on the web-facing surface. The vacuum slot is in fluid communication with the web-facing surface and extends from the web-facing surface to the body which is in further fluid communication with a vacuum source. The web-facing surface has a textured clothing interposed between the web-facing surface of the vacuum apparatus and a backside of the papermaking belt. The textured clothing creates leakage between the backside of the papermaking belt and the web-facing surface of the vacuum apparatus and effectively eliminates the vacuum seal between these two surfaces. In one preferred embodiment, the textured clothing comprises an endless belt adapted to travel around the vacuum apparatus | ||||||
| 209 | Method and device for removing water from a paper or board web by pressing | US725413 | 1996-10-03 | US5792320A | 1998-08-11 | Heikki Kaasalainen; Jukka Kinnunnen; Jorma Laapotti; Nils Soderholm |
| A method and device for removing water from a paper or board web and for passing the web as a closed draw from a forming wire or transfer wire of the web former to the press section and through one or more dewatering press nips in the press section. The web that runs on the forming wire or transfer wire is made to adhere in a transfer and pre-press zone to an outside face of a transfer belt which is substantially non-water-receiving. After this pre-press zone, the web is separated substantially immediately from the wire and passed on support of the transfer belt onto the next press fabric in the press section and/or into the next press nip. In the pre-press zone or zones, a substantial amount of water is removed out of the web substantially in one direction only, and, at the same time, the web is made to adhere reliably to the outside face of the transfer belt. | ||||||
| 210 | Vacuum apparatus having flow management device for controlling the rate of application of vacuum pressure in a through air drying papermaking process | US706916 | 1996-09-03 | US5718806A | 1998-02-17 | Paul Dennis Trokhan; Donald Eugene Ensign; Peter Graves Ayers |
| A papermaking vacuum apparatus having a web-facing surface adapted to support a papermaking belt and comprising a head, a body and at least one vacuum slot disposed in the head and defining an aperture on the web-facing surface. The vacuum slot is in fluid communication with the web-facing surface and extends from the web-facing surface to the body which is in further fluid communication with a vacuum source. The vacuum apparatus has a flow management device facing said web-contacting surface of the papermaking belt and disposed such that the papermaking belt having the paper web thereupon travels between the flow management device and the web-facing surface of the head. The flow management device has an air flow resistance and controls the distribution of the air flow through the aperture on the web-facing surface such as to effectively increase in the machine direction the amount of vacuum pressure applied through the vacuum slot to the papermaking belt. | ||||||
| 211 | Curved suction box apparatus in a papermaking machine press section | US905256 | 1992-06-26 | US5328569A | 1994-07-12 | Dennis C. Cronin |
| A curved suction box apparatus is disclosed for guiding a web towards a nip of a nip press. The apparatus includes an initial shoe which is disposed upstream relative to the nip, the shoe defining a convex surface for guiding the web. A box is disposed downstream relative to the initial shoe for guiding the web from the initial shoe. The box is connected to a partial vacuum. | ||||||
| 212 | Method of and an arrangement for passing a fibre web from a wire through a press section | US683111 | 1991-03-25 | US5124000A | 1992-06-23 | Jouko Stenvall |
| A method and an arrangement for passing a fibre web (25) from a wire (3) of a former (1) through a press section (2) including at least three nips (N1, N2, N3) each formed by a pair of press rolls. The method involves transferring the web (25) from the wire (3) onto a sucession of press felts (7) and passing it through the nips (N1, N2, N3) so that it is all the time from the separating point of the web (25) and the wire (3) at least up to the third nip (N3) supported on both sides and in contact with at least one felt (7, 13, 18) acting as a support element. Another support element includes suction zones in various ones of the press rolls for causing air pressure to press the web against the press felt on which it is being conveyed. The arrangement includes press rolls (6, 8, 12, 15, 16) forming at least three nips (N1, N2, N3), and at least one press felt (7, 9, 13, 18) for each nip (N1, N2, N3), and support elements for supporting the web (25) on both sides all the time from the separating point of the web (26) and the wire (3) at least up to the third nip (N3). | ||||||
| 213 | Couch press transfer apparatus | US411804 | 1989-09-25 | US4921575A | 1990-05-01 | Robert E. Page |
| Apparatus for transferring a newly formed paper web from the forming fabric over a couch roll in a papermaking machine includes a transfer roll which guides a pick-up felt into nipping engagement with the paper web over the couch roll. The nip is located intermediate the circumferentially spaced ends of a vacuum zone on the surface of the couch roll. The web with the forming fabric on one side and the pick-up felt on the other side is guided onto the transfer roll surface by the forming fabric downstream of the nip and is transferred onto the pick-up felt. The transfer roll has a vacuum zone located downstream of where it is wrapped by the forming fabric. The application of pressure on the web over the couch roll prior to, and in conjunction with, the nip operates to further dewater the web as well as to facilitate its transfer to the pick-up felt. | ||||||
| 214 | Web transfer apparatus | US888021 | 1986-07-18 | US4815220A | 1989-03-28 | Gregory L. Wedel |
| A web transfer apparatus is disclosed for transferring a web from a press section to a dryer section. The transfer apparatus includes a dryer fabric extending around the dryer section for conveying the web from the press section to, and around, the dryer section so that excess water remaining in the web after the press section is removed from the web when passing through the dryer section. A first plurality of rotatable rolls movably support the dryer fabric and a frame rotatably supports the first plurality of rolls. The first plurality of rolls includes a lead-in roll which is disposed adjacent to the press section for guiding the web from the press section towards the dryer section. The first plurality of rolls also includes a first transfer roll which is spaced relative to the lead-in roll for guiding the web through the dryer section. A transfer fabric cooperates with the dryer fabric such that the transfer fabric and dryer fabric define therebetween a transfer section which extends along the dryer fabric and between the lead-in roll and the transfer roll. The transfer section permits support of the web therethrough so that the web is easily led to the dryer section while inhibiting any tendency of the web to droop during threading of the web from the press section to the dryer section. | ||||||
| 215 | Transfer arrangement for guiding the paper web from the press section of a paper machine to it's drying section | US546925 | 1983-10-31 | US4566946A | 1986-01-28 | Martti Koponen; Olli Tapio |
| In a paper making machine, transfer apparatus for guiding a paper web from the press section to the drying section includes a smoothing press including upper and lower smoothing press rolls wherein the web is passed from the press section to the smoothing nip either directly or guided by a guide roll. The lower smoothing press roll of the smoothing press is substantially situated at a position which is normally occupied by a so-called baby or lead-in cylinder of a conventional drying section and the drying wire of the drying section is guided over a sector of the lower smoothing roll which is of a size sufficiently large that the web is transferred onto the drying wire which then carries the web as a closed draw onto the first drying cylinder of the drying section and, preferably, to the subsequent drying cylinders as a so-called single-fabric draw. | ||||||
| 216 | Guide roll and suction box for twin-wire forming system | US320962 | 1981-11-03 | US4406739A | 1983-09-27 | Matti Kankaanpaa |
| A procedure for dewatering and detaching a paper web from the second former wire. The composite of first and second wire and interposed web is contacted with a first cover part of a special suction box. A roll guiding the second wire, pressing from the side of the latter deflects its run. This pressure plus centrifugal force, and the differential pressure arising from the suction box, dewater the web. The second wire is separated to follow along with the guide roll, while web and first wire are acted on by the suction box vacuum. The first wire is then contacted with a second cover part of the suction box. A twin-wire former is also disclosed, featuring within its carrying wire loop, on its twin-wire run, a rotating forming roll deflecting the composite of wires and web as it laps a given sector of said forming roll. A special suction box at the ultimate end of the wires has a bipartite cover its parts angulated against each other and preferably planar. | ||||||
| 217 | Method of suppressing paper web flutter | US76611 | 1979-09-18 | US4321107A | 1982-03-23 | Robert E. Page |
| Web flutter is suppressed by means of one or more foils along the path of movement of the web which may be porous, such as tissue, whether creped or not, or may be substantially non-porous. For porous web, the foil may be imperforate. For non-porous web, the foil may be foraminous. As the web travels at high speed in adjacently spaced relation to the foil, surface air pressure tends to be greater on the surface of the web opposite the web surface which faces the foil, thus tending to thrust the travelling web toward the foil, and thus stabilizing web travel and suppressing tendency for the web to flutter as it travels freely between supports such as a dryer and a calender. | ||||||
| 218 | Press method in a paper machine | US82063 | 1979-10-05 | US4285766A | 1981-08-25 | Matti Kankaanpaa |
| A method in a paper machine press section for dewatering a wet paper web by threading the web in an improved way and avoiding crushing or stretching the web structure through at least three nips of the press section. The invention is particularly characterized by following features of dewatering steps. The web while passing the press section through said three nips is all the time adhered to and supported by the surface of a felt or a roll without any open draws therebetween. Pressing the web in the first nip takes place between two felts and so the web is dewatered simultaneously through both sides of the web. Further dewatering and pressing steps take place in press nips which all are formed against a plain roll having a large diameter which enables a spacious location of the press rolls and their felts. Detaching the web from the surface of said plain roll for conducting the web into dryer section, takes place in a point allowing easy removal and handling in case of a web break. | ||||||
| 219 | Paper manufacturing structure particularly for detaching a web from a wire | US922800 | 1978-07-07 | US4224104A | 1980-09-23 | Matti Kankaanpaa |
| A paper machine has a forming wire loop which transports a web to a detachment transfer roll situated inside said wire loop at a detaching location where the web is to be detached from the wire and transported to a press section. A relatively dry felt engages the web on a sector of the detachment transfer roll at the detaching location and receives the web from the wire and continues to transport the web, while it adheres to the felt, to the press section. The detachment of the web from the wire on the detachment transfer roll is facilitated by the centrifugal force acting on the web which results from the substantial change of direction undergone by the web on the detachment transfer roll. In one embodiment, the press felt is directed to cover the web on a sector of the detachment roll by a press suction roll located on substantially the same level as the detachment transfer roll, the press roll having a suction sector which facilitates transfer of the web from the wire to the felt. | ||||||
| 220 | Apparatus for handling web material, and method | US939462 | 1978-09-05 | US4179330A | 1979-12-18 | Robert E. Page |
| Continuously running web material is transferred from a dryer, or the like, to a proximate calender, or the like, along flutter suppressing foils. The web may be calendered in a nip between a rotary calender roll and a reel drum with which a reel core is in nip relation for winding the web on the core. The calender may comprise a single roll or a plurality of rolls. A split torque arrangement is provided for the reel drum and the reel core. Especially useful for handling creped tissue paper web. | ||||||
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