Common Roll Patents (Class 100/162R)
  • Patent number: 6145127
    Abstract: Calender having a frame having a roll stack therein and a lower deflection control roll as the lowermost roll of the roll stack. The lower deflection roll has a sleeve supported on a bracket having opposed ends. The lower deflection control roll further has a deflection control device configured to secure the bracket against rotation. The deflection control device is further configured to operate in the direction of a center place of the roll stack. The calender further has a pair of bearing blocks, each bearing block being configured to hold a respective end of the bracket. Each bearing block is adjustable by a respective loading device. The calender further includes a pair of pivoted arms each having a proximal end and a distal end, the proximal end swivelly connected to the frame, and the distal end connected to a respective bearing block.
    Type: Grant
    Filed: July 15, 1999
    Date of Patent: November 14, 2000
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventors: Thomas Wohner, Joachim Hinz, Ralf Beckers
  • Patent number: 6003440
    Abstract: A method for calendering a web such as a paper web in a multi-nip calender or supercalender, in which the web is passed through calendering nips formed by rolls placed in two or more stacks of rolls. The web is passed alternatingly from the corresponding calendering nip in each stack of rolls into the calendering nip in the following stack of rolls. In other words, the web is passed from a first calendering nip in a first stack of rolls to a first calendering nip in a second stacks of rolls, after the first calendering nip in the second stack of rolls to a second calendering nip in the second stack of rolls, from the second calendering nip in the second stack of rolls to a second calendering nip in the first stack of rolls, and after the second calendering nip in the first stack of rolls to further processing.
    Type: Grant
    Filed: November 2, 1998
    Date of Patent: December 21, 1999
    Assignee: Valmet Corporation
    Inventors: Jukka Koskinen, Markku Kyytsonen, Vilho Nissinen
  • Patent number: 5911174
    Abstract: Calender that may include two separately operable roll stacks. Each roll stack may include a top roll composed of a deflection compensation roll and a bottom roll composed of a deflection compensation roll. The two roll stacks may be arranged one atop the other.
    Type: Grant
    Filed: July 28, 1997
    Date of Patent: June 15, 1999
    Assignee: Voith Sulzer Finishing GmbH
    Inventors: Dirk Cramer, Horst Muller, Ulrich Wagner
  • Patent number: 5891296
    Abstract: A film peeling and removing apparatus is provided for peeling or removing a film from a resin material of a coated resin member of a coated resin product. The film peeling apparatus includes a resin-material-side roll, a film-side roll and a third roll. The film-side roll rotates at a higher peripheral speed than that of the resin-material-side roll. The film-side roll is associated with the resin-material-side roll for rolling the coated resin member therebetween while applying a shearing stress film from the film resin material. Then, the resin material is fed between the resin-material-side roll and the third roll while being curved along the roll surface of the resin material roll. The third roll is associated with the resin-material-side roll for rolling .+-.ed ted resin material therebetween while applying a shearing stress between a residual film and the resin material so as to peel the residual film from the resin material.
    Type: Grant
    Filed: August 23, 1996
    Date of Patent: April 6, 1999
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Hiroshi Yamamoto, Kouji Takahashi
  • Patent number: 5855168
    Abstract: A sugar cane milling system for two roll or three roll crushing mill modules in tandem in which one or more of these mill modules is provided in addition and adjacent to it with at least one toothed feeder roller and with a juice drainer in the form of a scraper-cum-short deflector for feeding a compact mat of prepared cane/bagasse directly to the nip of the crushing rolls of the modules. The prepared cane mat is fed approximately at the same speed as the surface speed of the crushing mill rolls without sharp changes in direction. Superficial juice is separated out as the cane mat is fed. A pressurized juice extracting conveyor is provided for removing the extra unabsorbed juice as well as squeezing out the absorbed juice out of cush-cush.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: January 5, 1999
    Inventor: Bhausaheb Bapurao Nikam
  • Patent number: 5791242
    Abstract: A calender for treating both sides of a paper web includes hard rollers and soft rollers. Working nips are formed between the juncture of each hard roller and soft roller. The roller stack can be loaded from one end, and preferably includes six to eight rollers. A changeover nip is formed by the juncture of two soft rollers or at the transition between two stacks. When using two stacks, each stack preferably has three to five rollers. At least one working nip has a dwell time of at least 0.1 ms. A heatable roller adjacent to the working nip is heated to a surface temperature of at least 100.degree. C. The roller stack is loaded such that an average compressive stress in the working nip is greater than or equal to 42 N/mm.sup.2.
    Type: Grant
    Filed: March 7, 1996
    Date of Patent: August 11, 1998
    Assignee: Voith Sulzer Finishing GmbH
    Inventors: Franz Kayser, Rolf van Haag, Ulrich Rothfuss, Reinhard Wenzel
  • Patent number: 5784955
    Abstract: A calender has at least four rollers that are located one above the other. The rollers rotate about roller bearings. The calender is located within a paper-making machine. Each of the rollers is rotatably driven by an independent driving mechanism. At least two of the rollers are heatable. At least 40% of the rollers are soft rollers. The outer coverings of the soft rollers are made of a synthetic material that is not sensitive to marking so that a doctor blade can be applied to the soft rollers. The calender includes a device that inserts a paper guide strip into the calender.
    Type: Grant
    Filed: November 14, 1996
    Date of Patent: July 28, 1998
    Assignee: Voith Sulzer Finishing GmbH
    Inventor: Hans-Rolf Conrad
  • Patent number: 5746124
    Abstract: A calender for treating a web of paper includes a stack of hard rollers and soft rollers. The stack includes a first set of processing nips and a second set of processing nips. Each processing nip is formed by a juncture of one of the hard rollers and one of the soft rollers. One side of the web of paper contacts against the hard rollers in the first set of processing nips and contacts against the soft rollers in the second set of processing nips. At least a last soft roller in the stack, which delimits a last processing nip that the web of paper passes through in the calender, has a lower surface roughness R.sub.a than a surface roughness R.sub.a of at least a first soft roller in the stack. The first soft roller delimits a first processing nip that the web of paper passes through in the calender. The surface roughness R. of the last soft roller is less than 0.35 .mu.m.
    Type: Grant
    Filed: December 16, 1996
    Date of Patent: May 5, 1998
    Assignee: Voith Sulzer Finishing GmbH
    Inventor: Franz Kayser
  • Patent number: 5655442
    Abstract: A calender having one stack of rollers has a working nip formed between a hard roller and a soft roller. A changeover nip is formed between adjacent soft rollers. The changeover nip is arranged approximately in the center of the roller stack. The cumulative weight of the rollers is such that the sum of the loads per unit of length of the working nips disposed above the changeover nip is at least 80 percent of the sum of the loads per unit of length of the working nips disposed below the changeover nip.
    Type: Grant
    Filed: March 7, 1996
    Date of Patent: August 12, 1997
    Assignee: Voith Sulzer Finishing GmbH
    Inventors: Hans-Rolf Conrad, Franz Kayser
  • Patent number: 5649478
    Abstract: A method and apparatus are disclosed for finishing a web of paper, paperboard or the like to achieve enhanced stiffness with a minimal loss of caliper or bulk. For this purpose, liquid spray devices are substituted for the conventional waterboxes of a machine calender. These devices permit the independent control of the thickness of liquid films applied to the transfer rolls of the calender with greater uniformity. The liquid films are transferred to the surfaces of the web at transfer nips. The method produces an I-beam effect in the web with highly densified and smooth surface layers and a bulky interior to maximize stiffness.
    Type: Grant
    Filed: October 7, 1996
    Date of Patent: July 22, 1997
    Assignee: Westvaco Corporation
    Inventor: D. Deepak Chadha
  • Patent number: 5546856
    Abstract: A hot soft nip calender apparatus is provided for a paper mill. The apparatus includes at least one heated calender roller and a finishing belt which is moved in proximity to the heated calender roller by a plurality of drive rollers and at least one pressure roller. Thus, a heated calender nip is defined between the heated calender roller and the finishing belt. A web of paper is passed through the nip, such that one surface of the web of paper is contacted by the heated calender roller, while the opposed surface of the web is contacted by the finishing belt. The finishing belt has an extremely smooth surface for contacting the web of paper so as to impart appropriate smoothness and gloss characteristics to that surface. The finishing belt can readily be changed when worn or damaged or to alter the characteristics being imparted to a web of paper.
    Type: Grant
    Filed: November 21, 1994
    Date of Patent: August 20, 1996
    Inventors: Thomas M. Neider, Robert J. Rudt
  • Patent number: 5522312
    Abstract: A method and apparatus are disclosed for uniformly applying a metered film of liquid to one or both surfaces of a web of paper, paperboard or the like at a waterbox calender to achieve enhanced finishing with minimal loss of caliper. For this purpose, a liquid metering element is adjustably mounted on a conventional waterbox associated with the calender, for precisely controlling the thickness and uniformity of a liquid film applied to the calender roll. The liquid film is subsequently transferred to the web at a transfer nip of the waterbox calender.
    Type: Grant
    Filed: March 6, 1995
    Date of Patent: June 4, 1996
    Assignee: Westvaco Corporation
    Inventor: Dean R. Johnson
  • Patent number: 5400707
    Abstract: A hot soft nip calender apparatus is provided for a paper mill. The apparatus includes at least one heated calender roller and a finishing belt which is moved in proximity to the heated calender roller by a plurality of drive rollers and at least one pressure roller. Thus, a heated calender nip is defined between the heated calender roller and the finishing belt. A web of paper is passed through the nip, such that one surface of the web of paper is contacted by the heated calender roller, while the opposed surface of the web is contacted by the finishing belt. The finishing belt has an extremely smooth surface for contacting the web of paper so as to impart appropriate smoothness and gloss characteristics to that surface. The finishing belt can readily be changed when worn or damaged or to alter the characteristics being imparted to a web of paper.
    Type: Grant
    Filed: April 1, 1994
    Date of Patent: March 28, 1995
    Assignee: Champion International Corporation
    Inventors: Thomas M. Neider, Robert J. Rudt
  • Patent number: 5397526
    Abstract: Apparatus for reconfiguring at least three finishing rolls in a plastic sheet fabricating sheetline includes a base, a pair of spaced upright support structures, and pairs of first and second spaced support assemblies. The upright support structures are mounted on the base and support a center one of the rolls in a stationary position therebetween and for rotation about a first axis. The first support assemblies support a first outer one of the rolls therebetween for rotation about a second axis and are mounted to the support structures for permitting angularly adjustable movement of the first outer roll relative to the center roll about the first axis to reconfigure the angular position of the first outer roll relative to the center roll.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: March 14, 1995
    Assignee: HPM Corporation
    Inventors: James H. Perkins, Charles C. Treisch, Jr., Howard E. Radel, William N. Calland
  • Patent number: 5329844
    Abstract: A calender in a paper or board machine comprises a calender frame, at least two soft-faced rolls mounted on the calender frame and at least one hard roll mounted on the calender frame in a manner that allows the hard roll to be displaced between a first position in which it forms calendering nips with the two soft-faced rolls and a second position in which it is spaced from the soft-faced rolls. During threading of the web; while the calender is in operation, the hard roll is shifted to its second position, the web is passed over the soft-faced rolls, and the hard roll is shifted back to its first position and brings the web into the nips between the hard roll and the soft-faced rolls.
    Type: Grant
    Filed: October 10, 1991
    Date of Patent: July 19, 1994
    Assignee: Valmet Paper Machinery Inc.
    Inventors: Pekka Koivukunnas, Juha Honkala, Risto Turunen, Juhani Niskanen, Ville Korhonen, Timo Pirinen
  • Patent number: 5326319
    Abstract: A device with which mowed straw material is prepared, that is, broken up into fibers, in order to speed up the drying process. In order to create a compact device that effectively prepares the straw material, there is an aggregate 3 provided with a central roll 5, to which there are assigned planetary rolls 6, 7 arranged around part of the outer circumference and rotating in the opposing direction, and the straw material is led into the clearance zone between the planetary rolls 6, 7 and the central roll 5. In order to improve preparation, the central roll 5, as well as the planetary rolls 6, 7, are provided with a surface structure matched to one another. The aggregate 3 comprises all components necessary for preparation and can be pre-assembled and installed in a grass-matting machine in vibration-isolated fashion via the elastic support 20.
    Type: Grant
    Filed: October 2, 1992
    Date of Patent: July 5, 1994
    Assignee: Klockner-Humboldt-Deutz AG
    Inventors: Wilhelm von Allworden, Martin Hafele
  • Patent number: 5320035
    Abstract: An improved sugar cane juice extractor has removable crushing rollers. The juice extractor preferably includes a housing with a juice extracting compartment and a closure for accessing the compartment. The closure is preferably a clear plate which permits viewing of the compartment during operation and, when removed, allows access to the compartment for removal of the crushing rollers and cleaning of the rollers and the compartment. A safety switch can be provided to prevent rotation of the rollers when the closure is displaced. A guide into the compartment is preferably provided to direct the sugar cane and any flavorings into the crushing rollers. A waste channel is provided for the exit of crushed cane pulp.
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: June 14, 1994
    Assignee: Salus Corporation
    Inventors: Alfredo J. Sanchez, Rafael E. Sanchez, Jr., Charles J. Stemmann, Jr.
  • Patent number: 5251551
    Abstract: A calendering apparatus in which a nip portion is formed by a chilled roll, a backing roll and an endless elastic belt arranged over the backing roll, wherein a paper sheet to be treated passes between the chilled roll and the endless elastic belt. Thus, a paper sheet having a remarkably improved smoothness and gloss can be obtained by the calendering apparatus of the present invention using an endless elastic belt having a relatively long length, without the disadvantage of a heat build-up occurring in a usual calendering treatment. A contacting angle between the belt and the backing roll is 30.degree. or less.
    Type: Grant
    Filed: March 2, 1992
    Date of Patent: October 12, 1993
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Tsuyoshi Abe, Jun Kobayashi
  • Patent number: 5237915
    Abstract: A calender stack having a plurality of hard and soft calender rolls for use in calendering a coated or uncoated paper web which comprises employing a plurality of soft rolls exhibiting at least two distinct levels of hardness and arranging the rolls in a calender such that the level of hardness is progressively harder in the direction of travel of the coated paper web.
    Type: Grant
    Filed: December 15, 1992
    Date of Patent: August 24, 1993
    Assignee: The Mead Corporation
    Inventor: Robert R. Rounsley
  • Patent number: 5215009
    Abstract: An improved calender apparatus for compressing and magnetic recording coating applied thereto, comprises a central roll (1) having a hard surface, around which the magnetic web is wrapped so that one side of the web bears against the central roll, while bearing against the other side of the web are at least three supporting rolls (2) which are distributed evenly around the central roll. With support roll can being rolls linearly displaced, the central roll can be swung out by a jointed lever and the web completely unthreaded. As a result, with two calender apparatuses arranged in series, cleaning of one apparatus is possible while production is not interrupted. The radius of the central roll is less than the radius of the supporting rolls, resulting in a higher linear pressure; in addition, the central roll may be made or mounted in such a way that it is flexible, in order to compensate in this way for unevennesses of the supporting rolls or of the coating.
    Type: Grant
    Filed: March 11, 1992
    Date of Patent: June 1, 1993
    Assignee: BASF Magnetics GmbH
    Inventor: Johann Baarfuesser
  • Patent number: 5085140
    Abstract: A presser belt separator for separating a mixture of flowable and non-flowable constituents has a pressure belt that is driven downstream to engage part of a circumferential surface of a perforated drum. A belt pressing structure and a presser roller presses the belt against the surface of the drum to form a draw-in wedge for drawing in the material to be processed between the presser belt and the perforated drum. The belt presser has a surface contour that engages the belt to form a curvature in the central area of the presser belt. The surface contour decreases in curvature from an upstream region of the belt presser to a downstream region thereof. The presser structure is also resiliently urged against the perforated drum by force-adjustable pressure springs.
    Type: Grant
    Filed: October 10, 1990
    Date of Patent: February 4, 1992
    Assignee: Nordischer Maschinenbau Rud. Baader GmbH & Co. KG
    Inventor: Helmut Kunig
  • Patent number: 5065673
    Abstract: A moisture control system including an apparatus for discharging independently variable amounts of working fluid toward selected cross-directional sections of a calendered sheet material after the material has left the calender stack and before it is taken up by a collection device. The apparatus includes a plurality of valves spaced across the width of the calendered material to control the amount of fluid applied to each section. Nozzles provided on the valves direct the fluid from the valves toward a surface of the calenderable material. The system permits cross-directional equalization of the moisture content of the calendered material without affecting other physical properties of the sheet, such as sheet finish.
    Type: Grant
    Filed: September 19, 1989
    Date of Patent: November 19, 1991
    Assignee: Measurex Corporation
    Inventors: Bruce S. Taylor, Ramesh Balakrishnan
  • Patent number: 5060565
    Abstract: The smoothing and calibrating of paper is described which utilizes a calender mechanism, particularly in its application to the production of photographic base paper in a papermaking line, and in which hard cylinders are positioned next to each other in which adjacent cylinders are of different diameters.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: October 29, 1991
    Assignee: Felex Schoeller Jr. GmbH & Co.
    Inventor: Friedrich-Wilhelm Schonheit
  • Patent number: 4960046
    Abstract: A calender arrangement including a first stack of rolls with a first heated hard roll, which, together with a center soft roll, forms a nip. On the other side of the soft roll, another soft roll is arranged, which, together with the soft roll, forms another nip. A second stack of rolls with a soft roll which interacts with a second hard heated roll follows the first stack of rolls. The second hard heated roll contacts the paper web on the side lying opposite the side contacted by the first heated hard roll in the first stack. A further hard roll can also cooperate with the hard roll in the second stack to form a hard nip. The treatment that the paper web undergoes, varies in accordance with the type and sequence of the nips through which it is guided.
    Type: Grant
    Filed: June 22, 1989
    Date of Patent: October 2, 1990
    Assignee: Eduard Kusters Maschinenfabrik GmbH & Co KG
    Inventors: Helmut Anstotz, Egon Brink
  • Patent number: 4941607
    Abstract: A magazine for storage of elastic supercalender rolls has two upright frame members each of which carries several tracks at different levels and reciprocable roll holders in the tracks. Chains are provided to move the holders between extended position, in which they are accesible for reception of rolls from a supercalender or from another location, and retracted positions in which the axes of stored rolls are located in a common vertical plane. Each holder on one of the frame members is located at the level of a holder on the other frame member. Movements of holders on one of the frame members are synchronized with movement of corresponding holders on the other frame member.
    Type: Grant
    Filed: December 8, 1988
    Date of Patent: July 17, 1990
    Assignee: Kleinewefers GmbH
    Inventor: Jurgen Schlunke
  • Patent number: 4915026
    Abstract: Method and apparatus for the finishing of a fiber web (W) by means of an on-machine calender connected to a paper machine or the like. The calendering apparatus includes a first hard roll (1) and a second hard roll (2) which is at a distance from the first one, and at substantially the same horizontal level, and in addition at least two elastic rolls (3,4,5) mounted on bearings borne by movable support (9,10,11,12). The elastic rolls (3,5) define in a working position calendering nips with the hard rolls (1,2). A number of paper guiding rolls (6,7,8,9,10,11) lead the course (W.sub.in .fwdarw.W.sub.out) of the web (W) through the calendering nips. The elastic rolls (3,4,5) have been arranged with respect to the hard rolls (1,2) so that the calendering nips (N.sub.1, N.sub.10, N.sub.11,N.sub.2, N.sub.20, N.sub.21) can be defined against the upper quadrant of the hard rolls (1,2) at substantially the same horizontal level with each other.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: April 10, 1990
    Assignee: Valmet Paper Machinery Inc.
    Inventor: Matti Halme
  • Patent number: 4901637
    Abstract: The invention concerns an equipment in the system of rolls in a supercalender for equalizing the profiles of linear loads between the rolls. In the normal way, the system of rolls comprises an upper roll, a lower roll, several intermediate rolls placed between the upper roll and the lower roll, as well as lifting spindles (40) placed at both sides of the system of rolls. The equipment in accordance with the invention comprises lightening devices (10) acting upon the bearing housing (38) at each end of at least one roll, the lightening devices being arranged to eliminate the distortions caused by the weight of the bearing housings (38) and the auxiliary devices attached to same in the lateral areas of the profiles of linear load between the rolls.
    Type: Grant
    Filed: December 13, 1988
    Date of Patent: February 20, 1990
    Assignee: Valmet Paper Machinery Inc.
    Inventors: Rauno Hagel, Wilhelm Landin
  • Patent number: 4889048
    Abstract: 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.
    Type: Grant
    Filed: April 13, 1988
    Date of Patent: December 26, 1989
    Inventor: Ray R. Miller
  • Patent number: 4826572
    Abstract: In a press-dehydrating section in a paper making machine, for the purpose of facilitating the replacement of a roll by lifting it up and axially moving it with crabs and wires, a portion of a frame of the press-dehydrating section positioned above the roll to be replaced is cut out, and both frame portions facing the cut-out portion are coupled by another frame member that is swingable over a predetermined angle in a horizontal plane. Thus, a dangerous and troublesome operation of rehanging a roll lifted up with crabs and wires by another wire can be dispensed with.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: May 2, 1989
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Toshio Fukui, Hiroyoshi Amano, Takayuki Origuchi, Katsuaki Suemune
  • Patent number: 4784596
    Abstract: A calendering apparatus is disclosed which includes means for replacing a desired take-up roller from a take-up roller train. Displaceable, bifurcated carrier means are disposed on the embossing means forming part of the calender apparatus, which carriers can accommodate individual take-up rollers. The rollers are then moved out of the train by such carriers. The embossing means are also displaceable into a position in a lifting mechanism which can be used to collect the roller from the carrier.
    Type: Grant
    Filed: December 18, 1987
    Date of Patent: November 15, 1988
    Assignee: Hermann Berstorff Maschinenbau GmbH
    Inventor: Wolfgang Heise
  • Patent number: 4767578
    Abstract: The invention relates to a method for the continuous stretching of a plastics material film, of the type where the film is run off in engagement with two successive rollers which are driven at different tangential speeds, the second roller having a tangential speed which is greater than that of the first roller. The film is run off in engagement with at least a third roller, arranged downstream of the second roller and driven at a tangential speed which is greater than that of the second roller, and it is possible to select as required those of the three rollers in engagement with the film.
    Type: Grant
    Filed: October 10, 1985
    Date of Patent: August 30, 1988
    Assignee: Newtec International
    Inventor: Hubert A. Thimon
  • Patent number: 4685390
    Abstract: A calender wherein a permanently installed main roll cooperates with at least one exchangeable roll to provide a nip for the passage of a web of paper or the like. The end portions of the exchangeable roll are mounted in bearings which are insertable into and extractible from sockets provided in levers which are pivotably mounted in the frame of the calender. The calender has a transporting unit which is provided with grippers for the bearings and with motors which reciprocate the grippers to extract the bearings from their sockets after the levers are pivoted to positions in which the exchangeable roll is spaced apart from the main roll. The transporting unit thereupon transfers the exchangeable roll onto a mobile rack which can be transported to a station where the exchangeable roll is repaired.
    Type: Grant
    Filed: April 23, 1985
    Date of Patent: August 11, 1987
    Assignee: Kleinewefers GmbH
    Inventors: Josef Pav, Reinhard Wenzel, Peter Svenka, Richard Rauf
  • Patent number: 4632655
    Abstract: An embossing calender for thermoplastics films in which the film is embossed by passage between an embossing roller and a counter-roller and in which the rollers can be rapidly changed or replaced. This is achieved by providing separate support arrangements for the two rollers, which arrangements permit the respective rollers to be displaced into and out of their working positions. The support arrangement for the embossing roller comprises a support member along which at least one holder for the roller is displaceable between a working position and at least one further inoperative position. This permits the selective positioning of each holder and its associated roller.The arrangement for the counter-roller comprises a support which has a pivotally mounted displacement device associated therewith. The displacement device includes holders.
    Type: Grant
    Filed: June 7, 1985
    Date of Patent: December 30, 1986
    Assignee: Hermann Berstorff Maschinenbau GmbH
    Inventor: Helmut Benkwitz
  • Patent number: 4596633
    Abstract: Paper and paperboard which have been thoroughly dried but not calendered is provided with a smooth surface by rewetting a thin layer (5% to 10% of the thickness) along the surface and then pressing the resulting damp surface against a substantial portion of the surface of a heated dryer drum or other smooth-surfaced cylinder. This technique provides the web with a surface comparable in smoothness with what can be obtained by calendering but without the degree of compaction which occurs in calendering, due to the fact that with the major portion of the web dried, it is highly resistant to such compaction. The same method steps can be applied subsequently to the reverse side of the web to provide it with two smooth surfaces. It is also possible to forego the rewetting step if the initial drying of the web is unsymmetrical so that one surface remains wetter than the remaining portion of the web.
    Type: Grant
    Filed: November 21, 1984
    Date of Patent: June 24, 1986
    Assignee: The Black Clawson Company
    Inventor: Brian W. Attwood
  • Patent number: 4510859
    Abstract: Load transfer rod columns extending upwardly along slide blocks of the bearing structures of calender rolls have associated therewith hydraulically operated assemblies for acting on the bearing structures whereby to selectively transfer to the rod columns the overhanging deadweight of the bearing structures when the rolls are in their nipping mode for maintaining the rolls in straight and parallel nip relation. The rod columns thrust downwardly against a load supporting base, which conveniently comprises the slide blocks of a king roll at the bottom of the calender stack.
    Type: Grant
    Filed: January 23, 1984
    Date of Patent: April 16, 1985
    Assignee: Beloit Corporation
    Inventor: Kenneth W. Berry
  • Patent number: 4501197
    Abstract: A calender and method of operating the same, where the calender has a vertical stack of a plurality of rotary rolls, each of the rolls having bearing structure at each opposite end provided with a thrust shoulder cooperative with a stop shoulder on a respective suspension spindle at each end of the rolls. There are guideways for the bearing structures, and there is an arrangement for vertically shifting the rolls between a lowered mode for spaced apart independent suspension by stop shoulders and a raised nipping mode relation with one another. The weight of the bearing structures of the rolls in the raised nipping mode relation is relieved as by cooperating pawl and rack structure.
    Type: Grant
    Filed: October 19, 1983
    Date of Patent: February 26, 1985
    Assignee: Beloit Corporation
    Inventors: Gerald W. Karr, Gernot Muller
  • Patent number: 4497246
    Abstract: An arrangement for calendering bands of paper and like materials has one or more inelastic calendering rollers. Elastically deformable working rollers are associated with the calendering roller or rollers and are movable between operative positions in which they cooperate with the calendering roller or rollers to calender the bands and inoperative positions. Each of the rollers is rotated at a predetermined peripheral speed at which it calenders the bands. At least one of the working rollers has a drive capable of rotating it at a peripheral speed which is a small fraction of the predetermined peripheral speed. This working roller serves as a spare and is held in its inoperative position during a calendering operation while being rotated at a lower peripheral speed.
    Type: Grant
    Filed: April 28, 1983
    Date of Patent: February 5, 1985
    Assignee: Kleinewefers GmbH
    Inventors: Josef Pav, Heinz Jaegers
  • Patent number: 4492612
    Abstract: On-machine supercalender apparatus is provided at the output side of a paper machine and includes a plurality of soft and hard calendering rolls defining a plurality of soft calendering nips arranged successively in the direction of the run of the web being calendered, each soft calendering nip being formed by a pair of calendering rolls including a respective soft calendering roll and a corresponding respective hard calendering roll. According to the invention, the run of the web is guided successively through the nips in a manner such that the soft rolls do not participate in the guidance of the run of the web, i.e., the web is only guided in its run on the outer surfaces of the hard calendering rolls and, possibly, guide rolls.
    Type: Grant
    Filed: May 21, 1981
    Date of Patent: January 8, 1985
    Assignee: Valmet OY
    Inventor: Reino Matarainen
  • Patent number: 4471690
    Abstract: In a supercalender at the laterally opposite sides of a driven hard roll supported for rotation at a fixed position by a frame there are arranged a pair of roll assemblies, each including at least one elastic roll and at least one hard roll detachably engageable with each other. The two roll assemblies are selectively engageable with the driven hard roll supported at a fixed position to form a series of rolls which are in contact together under pressure in such a manner that one of the roll assemblies is in an operative condition while the other roll assembly is in a rest position.
    Type: Grant
    Filed: November 22, 1982
    Date of Patent: September 18, 1984
    Assignee: Kanzaki Paper Manufacturing Co., Ltd.
    Inventors: Kozo S. Yamaguchi, Masatoshi Ando
  • Patent number: 4375188
    Abstract: On-machine supercalender apparatus adapted to be located at the discharge end of a paper making machine of the type which includes hard and soft calender rolls forming soft calendering nips with each other. The calender rolls are arranged in at least three roll groups, each of the calender roll groups consisting of three calender rolls, namely a central hard calender roll and two outer soft calender rolls. The calender roll groups are separate from each other in that the calender rolls of one group are neither directly or indirectly in nip contact with the calender rolls of another group. At least a majority of the soft calender rolls are replaceable during operation of the apparatus without any significant interruption in operation.
    Type: Grant
    Filed: June 8, 1981
    Date of Patent: March 1, 1983
    Assignee: Valmet Oy
    Inventor: Veikko Leiviska
  • Patent number: 4366752
    Abstract: Calender apparatus for paper or the like adapted to be directly associated with a paper machine and to operate as an on-machine supercalender includes a plurality of hard calendering rolls arranged over one another so as to form a stack of hard rolls and a plurality of soft calendering rolls adapted to define a series of soft supercalender nips with the hard rolls. The hard and soft rolls are mounted on drivable support apparatus whereby the hard nips defined by the hard rolls can be opened and the soft supercalender nips closed in order to accomplish supercalendering operation on a web passing through the apparatus.
    Type: Grant
    Filed: May 21, 1981
    Date of Patent: January 4, 1983
    Assignee: Valmet Oy
    Inventor: Erkki Koski
  • Patent number: 4357866
    Abstract: A calender for a traveling web is disclosed. A frame includes an upper part and a lower part, the lower part having a pair of vertical arms at each end, and the upper part being connected to the upper end of the arms. Bearing brackets are disposed at each end of the frame, between the vertical arms at that end. At least two horizontal rollers are accommodated in the bearing brackets, substantially in a single vertical pressing plane. The bearing brackets are held in place by the vertical arms and the upper part of the frame. Preferably, the upper part of the frame itself serves as the bearing bracket for the upper roller, and the bearing brackets may be secured to at least one of the vertical arms at each end of the frame.
    Type: Grant
    Filed: August 12, 1980
    Date of Patent: November 9, 1982
    Assignee: J. M. Voith GmbH
    Inventors: Gunter Rohde, Christian Schiel
  • Patent number: 4347784
    Abstract: A calender wherein the end portions of the lowermost roll of the roll train was mounted for movement along vertical guide rails on the stand. The lowermost roll is movable upwardly by two upright hydrostatic cylinder and piston units with plungers whose axes are coplanar with the axis of the lowermost roll. When the cylinder and piston units lift the lowermost roll to operative position, shoulders on the bearings abut against stationary stops on the stand and the stops are disposed only at one side of the common plane of the aforementioned axes so that the bearings tend to jam against the adjacent portions of the guide rails as soon as the shoulders engage the respective stops. The jamming action is enhanced if the stops are remote from the aforementioned plane and if the guide rails have T-shaped heads which are slidable in complementary T-shaped grooves of the bearings. The stops are installed at the level of the axis of the lowermost roll.
    Type: Grant
    Filed: January 30, 1981
    Date of Patent: September 7, 1982
    Assignee: Kleinewefers GmbH
    Inventors: Josef Pav, Gerhard Hartwich, Jorg Prey
  • Patent number: 4332191
    Abstract: Calender apparatus adapted to be directly associated with a paper machine for calendering a web leaving the same wherein at least two separate calendering units are mounted on a unitary frame spaced from one another. Each calendering unit includes at least one intermediate roll and two hard end rolls defining a respective pair of nips with the intermediate roll on substantially diametrically opposed sides thereof. The intermediate roll of a calendering unit may comprise a soft roll so that the pair of nips of the calendering unit are soft nips so that the calender apparatus comprises a supercalender.
    Type: Grant
    Filed: September 29, 1980
    Date of Patent: June 1, 1982
    Assignee: Valmet Oy
    Inventor: Matti Kankaanpaa
  • Patent number: 4326456
    Abstract: Method and apparatus for calendering paper webs or the like wherein a plurality of hard calendering rolls are situated to constitute a roll stack and wherein a plurality of soft calender rolls are situated in nip defining relationship with respective ones of the hard rolls whereby a plurality of corresponding hard and soft or supercalender nips are defined. The apparatus is adapted to be directly associated with a paper machine and force apparatus are provided in conjunction with the apparatus for supporting the hard and soft calender rolls so that the hard nips are closed and the soft nips are open during threading of the web through the apparatus during the start-up phase while the hard nips are opened and the supercalendering nips are closed after the web is threaded in order to perform continuous supercalendering of the paper web.
    Type: Grant
    Filed: September 29, 1980
    Date of Patent: April 27, 1982
    Assignee: Valmet Oy
    Inventor: Matti Kankaanpaa
  • Patent number: 4212504
    Abstract: The backing device has a back-up roll placed between the housings of a roll stand and the ends of the roll are mounted in the guide windows of the housings. A hydrostatic bearing has a body which rests on the back-up roll and a shell whose internal surface is spaced by a clearance from the barrel of the back-up roll and is provided with pockets. The back-up roll rests by its ends on a supporting beam which is pressed against it by pressure screws. The bearing shell is urged against the roll barrel by hydraulic cylinders mounted between the supporting beam and the bearing body. The chambers of the hydraulic cylinders are connected through respective conduits and throttles to the pockets on the shell internal surface, and there is at least one pocket for each hydraulic cylinder. The pockets and the respective hydraulic cylinders are connected to a single source of fluid under pressure.
    Type: Grant
    Filed: February 26, 1979
    Date of Patent: July 15, 1980
    Inventors: Nikolai I. Krylov, Ilya A. Toder, Valery A. Tolstykh, Gennady I. Tarabaev, Igor M. Makeev, Georgy S. Safarov, Alexei V. Birjulev, Anatoly I. Bakanov, Evgeny I. Sofronov
  • Patent number: 4211165
    Abstract: Apparatus for the compressive handling of a strip of material, especially for handling paper strip in a paper machine, includes a plurality of cooperating horizontal and vertical roller pairs arranged in ascending and/or descending step-like succession and forming compressive zones through which the strip of material passes. Certain rollers are movably mounted so that they may be pivoted away from the compressive zone for replacement during operation of the paper machine. Cable guides are provided for leading the strip through the compressive zones and, owing to the movable mounting arrangement of the rollers, the course of the cable guides through the compressive zones need not be altered when a roller is exchanged.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: July 8, 1980
    Assignee: Bruderhaus Maschinen GmbH
    Inventor: Gottlob Schill
  • Patent number: 4168660
    Abstract: A sugar mill utilizing an arrangement of rolls journalled between a pair of frame members, having a driven anvil roll as the lowermost roll. An adjustment cane roll is disposed between the frame members above the anvil roll. Intermediate and to one side of the cane and anvil rolls is a crusher/feed roll, and to the other side of the cane and anvil rolls there is a bagasse roll. The three uppermost rolls are adjustable with respect to one another, the side rolls may each be mounted in an eccentric or screw adjustable bearing support arrangement. A generally vertically disposed chute drops chopped sugar cane between the feed and cane rolls to permit gravity to aid in feeding of the chopped cane to the sugar mill. This arrangement of the rolls permits a higher sugar mill output per revolution of the rolls, than that of the prior art.
    Type: Grant
    Filed: October 19, 1977
    Date of Patent: September 25, 1979
    Assignee: USM Corporation
    Inventor: Alexander S. Zelle
  • Patent number: 4131063
    Abstract: A calender comprising a plurality of superimposed hard rolls and a number of soft rolls arranged to load laterally a plurality of these hard rolls. The soft rolls are arranged in pairs formed by two soft rolls opposite each other at both sides of the same hard roll. The distance between the axes of the hard rolls located between a pair of soft rolls is greater than the sum of the radii of these hard rolls.
    Type: Grant
    Filed: October 13, 1977
    Date of Patent: December 26, 1978
    Assignee: Oy Wartsila AB
    Inventor: Jukka Joutsjoki
  • Patent number: 4128053
    Abstract: A supercalender wherein a stack of metal rolls form an upright series of metal rolls defining hard nips between themselves. The upright series of metal rolls include top and bottom rolls and between the latter at least a pair of intermediate rolls one of which is an upper intermediate roll situated next to the top roll and the other of which is a lower intermediate roll situated next to the bottom roll. At least one pair of filled rolls are situated next to at least one of said intermediate rolls to define therewith a pair of soft nips.
    Type: Grant
    Filed: June 16, 1977
    Date of Patent: December 5, 1978
    Assignee: Valmet Oy
    Inventor: Matti Kankaanpaa