Patents by Inventor Rauno Rantanen

Rauno Rantanen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7879408
    Abstract: A method and apparatus for spreading a treating agent, for example, size or a coating onto a moving surface in the manufacture of the web-shaped folios or paper and paperboard and various sheet products in particular, includes feeding the treating agent into at least one feeding chamber and directing the agent from the feeding chamber onto the moving surface. Jets are formed from the treating agent by directing the agent through at least one nozzle plate comprising openings that are defined by the nozzle plate around the entire periphery, and the formed jets are applied directly onto the moving surface.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: February 1, 2011
    Assignee: Metso Paper, Inc.
    Inventor: Rauno Rantanen
  • Patent number: 7303634
    Abstract: The apparatus has a feed apparatus (10) and an evening-out apparatus (100) placed underneath the feed apparatus. The feed apparatus (10) has a feed chamber (12) with an inlet opening (13a), an outlet opening (13b), and a nozzle plate (18) with holes (19) and communicating with the outlet opening (13b) of the feed chamber. The evening-out apparatus (100) has at least one inclined surface (110) which forms a downwards sloping flow path (L1) for the treating agent. Jets discharge from the feed chamber (12) outlet opening (13b) through the nozzle plate (18) holes (19) to form a first treating agent flow (F1). One inclined surface (110) of the evening-out apparatus (100) receives the first treating agent flow (F1) and a second treating agent flow (F2) formed into an even laminar treating agent flow on the flow path (L1) of the evening-out apparatus (100) is passed onto a moving surface (200).
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: December 4, 2007
    Assignee: Metso Paper, Inc.
    Inventor: Rauno Rantanen
  • Patent number: 7022185
    Abstract: An assembly is disclosed treating a moving web (1) of paper or paperboard with a web treatment substance, the assembly comprising an application chamber (P2) located in a close vicinity of the moving web (1) and facing the web (1), whereby the chamber is delineated by the web (1), the walls (12) of the coater apparatus and sealing means (18, 24, 35) adapted to operate at the web ingoing and outgoing sides of the application chamber (P2). For application of the web treatment substance, the assembly includes at least one linear nozzle array incorporating at least one nozzle (21) for spraying the web treatment substance onto the web (1).
    Type: Grant
    Filed: March 13, 2002
    Date of Patent: April 4, 2006
    Assignee: Metso Paper, Inc.
    Inventors: Vilho Nissinen, Juha Leimu, Rauno Rantanen
  • Patent number: 6994771
    Abstract: A method for treating a web of paper or board with a wetting substance or calendering the web prior to the cylinder dryer section of a paper- or boardmaking machine while the solids content of the web is still very low, typically in the range of 10–60%, wherein the web can be conveyed when so desired fully supported from the wire section of the paper- or boardmaking machine up to the winder, while simultaneously utilizing the quality benefits obtained from a controlled reduction of the web moisture content and dewatering of the same. The web is conveyed supported by a transfer belt (9) through at least one web surface treatment apparatus such as a coater station (S1B) or a calender prior to passing the web to the first dryer cylinder group (1) of the paper- or boardmaking machine. One nip (11, 13) supported by a transfer belt (9) is suitable for dewatering simultaneously with the application of a treatment substance to the web.
    Type: Grant
    Filed: March 10, 2000
    Date of Patent: February 7, 2006
    Assignee: Metso Paper, Inc.
    Inventors: Hannu Korhonen, Rauno Rantanen
  • Publication number: 20050066889
    Abstract: The apparatus has a feed apparatus (10) and an evening-out apparatus (100) placed underneath the feed apparatus. The feed apparatus (10) has a feed chamber (12) with an inlet opening (13a), an outlet opening (13b), and a nozzle plate (18) with holes (19) and communicating with the outlet opening (13b) of the feed chamber. The evening-out apparatus (100) has at least one inclined surface (110) which forms a downwards sloping flow path (L1) for the treating agent. Jets discharge from the the feed chamber (12) outlet opening (13b) through the nozzle plate (18) holes (19) to form a first treating agent flow (F1). One inclined surface (110) of the evening-out apparatus (100) receives the first treating agent flow (F1) and a second treating agent flow (F2) formed into an even laminar treating agent flow on the flow path (L1) of the evening-out apparatus (100) is passed onto a moving surface (200).
    Type: Application
    Filed: January 15, 2003
    Publication date: March 31, 2005
    Inventor: Rauno Rantanen
  • Patent number: 6733630
    Abstract: Method and assembly for supporting a web (1) during the postprocessing of a web of paper or board, in which method the web is passed from a preceding device to at least one next downstream located web treatment device (4) wherein to at least one side of the web (1) is applied a treatment agent causing wetting of said side of said web, and the web (1) exiting said web treatment device is passed to at least one dryer means (8). The web (1) is contactingly supported in a continuous and unbroken manner at least from said web treatment device (4) to said dryer means (8). Advantageously, the web (1) is dried by means of at least one dryer (3) before taking the web to the web treatment device (4), and the web is contactingly supported in a continuous and unbroken manner at least from said dryer means (3) preceding said web treatment device (4) to said dryer means (8) located downstream next to said web treatment device.
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: May 11, 2004
    Assignee: Metso Paper, Inc.
    Inventors: Rauno Rantanen, Juha Lipponen
  • Publication number: 20040074440
    Abstract: An assembly is disclosed treating a moving web (1) of paper or paperboard with a web treatment substance, the assembly comprising an application chamber (P2) located in a close vicinity of the moving web (1) and facing the web (1), whereby the chamber is delineated by the web (1), the walls (12) of the coater apparatus and sealing means (18, 24, 35) adapted to operate at the web ingoing and outgoing sides of the application chamber (P2). For application of the web treatment substance, the assembly includes at least one linear nozzle array incorporating at least one nozzle (21) for spraying the web treatment substance onto the web (1).
    Type: Application
    Filed: November 18, 2003
    Publication date: April 22, 2004
    Inventors: Vilho Nissinen, Juha Leimu, Rauno Rantanen
  • Patent number: 6235156
    Abstract: In the method for paper web transfer in a paper machine or finishing apparatus for paper, a paper web (W) is transferred in a first machine portion (A) at a first travelling speed. In a second machine portion (B) following the first one in the travel direction of the web, the tail is transferred at a travelling speed lower than the first travelling speed. In the second machine portion (B) the tail (TB) is transferred independently without a draw connection to the web (W, TA) transferred in the first machine portion (A), the travelling speed of the tail (TA) transferred in the second machine portion (B) is increased, and a draw connection is established between the tail and the web (W, TA) transferred in the first machine portion.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: May 22, 2001
    Assignee: Valmet Corporation
    Inventors: Hannu Pullinen, Harri Kuosa, Rauno Rantanen
  • Patent number: 6190729
    Abstract: A method and apparatus for two-side coating of a light base weight printing paper web containing mechanical pulp or recycled fiber. The first side of a web (5) is coated in a first coating station (1), the coating applied to the first side is dried at least partially in a first dryer unit (3). The second side of the web (5) is coated subsequent to the drying of the first side in a second coating station (2), and the coating applied to the second side is dried at least partially in a second dryer unit (4). Both coatings are formed by applying a required amount of coating mix onto the perimeter of respective soft film-coating rolls (22) and subsequently transferring the coat film to the web (5) in a nip (N1) formed between a respective backing roll (24) and the respective soft film-coating roll (22).
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: February 20, 2001
    Assignees: Valmet Corporation, Metsä-Serla Paperi Ja Kartonki Oy
    Inventors: Rauno Rantanen, Kai Vikman
  • Patent number: 6177137
    Abstract: Method and arrangement for coating a web in a film press nip defined by a pair of rotating rolls and through which the web runs and in which a coating agent is applied as a film onto a face of at least one of the rolls and transferred in the nip from the face of the roll(s) onto a respective side of the web to thereby coat the respective side of the web. Steam jets are applied to each side of the web that is being coated to prevent formation of coating-agent mist at a web-outlet side of the nip. The steam jets can be directed from a location after the nip to the web-outlet side of the nip and/or substantially to a point of separation of the web from contact with the roll(s).
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: January 23, 2001
    Assignee: Valmet Corporation
    Inventor: Rauno Rantanen
  • Patent number: 6099909
    Abstract: The invention relates to a coating method and device for coating a size-press roll, paper or board or a corresponding moving base. The coating device comprises a revolving coating bar which rests against the moving base and extends across the machine width. The coating bar is supported in a cradle substantially over its entire length and is a large-diameter grooved bar fitted against the moving base. The coating bar spreads and smoothes a coating agent onto the moving base. The coating agent is introduced into the coating device in advance of the coating bar in the running direction of the moving base.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: August 8, 2000
    Assignee: Valmet Paper Machinery, Inc.
    Inventors: Rauno Rantanen, Hannu Korhonen, Markku Lummila, Timo Lintula
  • Patent number: 6004623
    Abstract: A coating device for coating a size-press roll, paper or board or an equivalent moving base including a revolving coating bar which rests against a moving base. The coating bar extends across the machine width and is supported on a cradle substantially over its entire length. The coating bar spreads and smooths a coating agent introduced into the coating device and applied onto the moving base before the moving base contacts the coating bar. The coating bar in accordance with the invention is a smooth bar of large diameter, fitted against the moving base so that the profile of coating quantity of the coating agent can be controlled.
    Type: Grant
    Filed: November 20, 1997
    Date of Patent: December 21, 1999
    Inventor: Rauno Rantanen
  • Patent number: 5792260
    Abstract: The invention concerns a method for two-sided coating of a printing-paper web with a coating paste or equivalent. In the method, the paper web is passed through the coating part of the paper machine, in which the first side of the web is coated in the first coating station of said coating part, and the coating-agent layer produced on the face of the web is dried at least partly by means of a first drying unit. The second side of the web is coated in the second coating station of the coating part, and the second coating-agent layer produced on the face of the web is dried at least partly by means of a second drying unit.
    Type: Grant
    Filed: March 19, 1996
    Date of Patent: August 11, 1998
    Assignee: Valmet Corporation
    Inventors: Rauno Rantanen, Pekka Haapanen
  • Patent number: 5690999
    Abstract: The invention relates to a coating device for the coating of a size-press roll, paper or board or an equivalent moving base. The coating device includes a revolving coating bar which rests against a moving base. The coating bar extends across the machine width and is supported on a cradle substantially over its entire length. The coating bar spreads and smooths a coating agent introduced into the coating device and applied onto the moving base before the moving base contacts the coating bar. The coating bar in accordance with the invention is a smooth bar of large diameter, fitted against the moving base so that the profile of coating quantity of the coating agent can be controlled.
    Type: Grant
    Filed: September 11, 1992
    Date of Patent: November 25, 1997
    Assignee: Valmet Corporation
    Inventor: Rauno Rantanen
  • Patent number: 5650010
    Abstract: A method and apparatus for two-side coating of a light base weight printing paper web containing mechanical pulp or recycled fiber. The first side of a web (5) is coated in a first coating station (1), the coating applied to the first side is dried at least partially in a first dryer unit (3). The second side of the web (5) is coated subsequent to the drying of the first side in a second coating station (2), and the coating applied to the second side is dried at least partially in a second dryer unit (4). Both coatings are formed by applying a required amount of coating mix onto the perimeter of respective soft film-coating rolls (22) and subsequently transferring the coat film to the web (5) in a nip (N.sub.1) formed between a respective backing roll (24) and the respective soft film-coating roll (22).
    Type: Grant
    Filed: December 15, 1995
    Date of Patent: July 22, 1997
    Assignee: Valmet Corporation
    Inventors: Rauno Rantanen, Kai Vikman
  • Patent number: 5567479
    Abstract: A method and device for coating of the face of a roll in a film size press with a coating agent by a coating device including a coating doctor that extends across the machine width and is loaded against the face of a roll in the film size press. The coating doctor spreads and smooths the coating agent, which has been introduced into the coating device and applied as a film onto the roll face before the coating doctor in the direction of rotation of the roll. To prevent the formation of streaks in the coating-agent film, in particular of streaks resulting from cavitation, adhesion of coating agent from the coating-agent film to the trailing side of the coating doctor is prevented by keeping the trailing side of the coating doctor moist or wet. Adhering of coating agent to the trailing edge of the coating blade is prevented by feeding a moistening medium as a constant flow to the area of the trailing edge.
    Type: Grant
    Filed: December 10, 1993
    Date of Patent: October 22, 1996
    Assignee: Valmet Corporation
    Inventor: Rauno Rantanen
  • Patent number: 5484482
    Abstract: A method and apparatus for limiting the width of a coating and/or preventing damage to roll ends while coating or surface-sizing paper or an equivalent web material in a coating device in which a coating agent, such as size, coating paste or equivalent, is introduced into the coating device to an application zone defined by a coating member, a moving base, lateral seals, and a front wall and spread onto the moving base by the coating member which is loaded against the moving base. Liquid jets are sprayed into the areas outside the coating width, substantially over the width defined by the lateral seals and the roll ends, either onto the moving base before the coating member in the running direction of the moving base or directly into the nip formed by the moving base and the coating member. The liquid jets lubricate the nip and dilute the coating agent that has entered into the areas outside the coating width.
    Type: Grant
    Filed: March 23, 1994
    Date of Patent: January 16, 1996
    Assignee: Valmet Paper Machinery, Inc.
    Inventors: Rauno Rantanen, Markku Lummila, Hannu Korhonen
  • Patent number: 5462594
    Abstract: The invention relates to a coating device for coating, e.g. a size-press roll, paper or board or of an equivalent moving base. The coating device comprises a revolving coating bar which rests against a moving base. The coating bar extends across the machine width and is supported in a cradle substantially over its entire length. The coating bar spreads and smoothes the coating agent onto the moving base which coating agent is introduced into the coating device in the running direction of the moving base before the coating bar. The coating bar in accordance with the invention is a smooth bar of large diameter arranged against the moving base so that the profile of coating quantity can be controlled.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: October 31, 1995
    Assignee: Valmet Paper Machinery Inc.
    Inventor: Rauno Rantanen
  • Patent number: 5383968
    Abstract: A method and device for keeping a coating rod and a rod cradle in a bar coater clean and for preventing leakage of the lubrication and/or cooling water used in the bar coater is disclosed. The invention is intended for a bar coater in which the coating rod is, supported revolvingly in a rod cradle substantially over its entire length. The rod cradle is attached to the frame constructions of the coater. The rod cradle is also provided with at least one groove substantially parallel to the coating rod and open towards said coating rod, in which grooves(s) water is circulated to lubricate, cleanse and/or cool the coating rod and the rod cradle. The coating rod is loaded towards the base to be coated by loading the rod cradle.
    Type: Grant
    Filed: November 4, 1992
    Date of Patent: January 24, 1995
    Assignee: Valmet Paper Machinery Inc.
    Inventors: Rauno Rantanen, Markku Lummila, Hannu Korhonen, Petri Paloviita, Jukka Koskinen
  • Patent number: 5303670
    Abstract: The invention concerns a device for metering of a coating agent onto a moving base, such as a paper or board web. The device includes first and second soft-faced applicator rolls defining a coating nip, through which nip a web is passed. The first applicator roll is journalled as fixed on a frame of the device, and the second applicator roll is linked to the frame of the device pivotally by the intermediate of a loading arm or the equivalent. At least one of the applicator rolls is in nip contact with a hard transfer roll, which is further in nip contact with a soft-faced metering roll. A pond of coating agent is located in a metering nip between the metering roll and a transfer roll. As the rolls revolve, the coating agent is transferred through the metering nip onto the face of the transfer roll and from there further through a transfer nip formed by the transfer roll and the applicator roll onto the face of the applicator roll.
    Type: Grant
    Filed: October 4, 1991
    Date of Patent: April 19, 1994
    Assignee: Valmet Paper Machinery Inc.
    Inventor: Rauno Rantanen