Patents by Inventor Pekka Linnonmaa
Pekka Linnonmaa 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).
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Patent number: 9133580Abstract: A method for modernizing a existing multiroll calender, having at least one stack of calender rolls (10, 20), each stack comprising at least two calender rolls (11, 12, 13, 14, 21, 22, 23, 24) and at least one of the calender rolls being a smooth-surfaced press-roll (12, 22). In an existing multiroll calender the smooth-surfaced press roll (12, 22) is replaced by an ultra thermo roll that is a thermo roll with a diameter substantially the same or less than the thermo roll to be replaced, so that the surface temperature of the ultra thermo roll when heated is at least 110° C., and has at least 10° C. higher than the surface temperature of the existing roll with the same heating fluid temperature and having flow channels arranged in such a way that vibration excitation is minimized, by being arranged to form a spiral geometry in the mantle.Type: GrantFiled: February 21, 2013Date of Patent: September 15, 2015Assignee: Valmet Technologies, Inc.Inventors: Jani Hakola, Lauri Aaltio, Mika Viljanmaa, Pekka Linnonmaa, Laura Savela, Arto Kumpulainen, Petri Ristola
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Publication number: 20130231230Abstract: A method for modernizing a existing multiroll calender, having at least one stack of calender rolls (10, 20), each stack comprising at least two calender rolls (11, 12, 13, 14, 21, 22, 23, 24) and at least one of the calender rolls being a smooth-surfaced press-roll (12, 22). In an existing multiroll calender the smooth-surfaced press roll (12, 22) is replaced by an ultra thermo roll that is a thermo roll with a diameter substantially the same or less than the thermo roll to be replaced, so that the surface temperature of the ultra thermo roll when heated is at least 110° C., and has at least 10° C. higher than the surface temperature of the existing roll with the same heating fluid temperature and having flow channels arranged in such a way that vibration excitation is minimized, by being arranged to form a spiral geometry in the mantle.Type: ApplicationFiled: February 21, 2013Publication date: September 5, 2013Applicant: Metso Paper, Inc.Inventors: Jani Hakola, Lauri Aaltio, Mika Viljanmaa, Pekka Linnonmaa, Laura Savela, Arto Kumpulainen, Petri Ristola
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Processing device and method of operating the device for processing a coated or uncoated fibrous web
Patent number: 7704351Abstract: A processing device and method applying the same for processing a coated or uncoated fibrous web is provided. The device comprises a belt configured to extend around a guiding element, at least one counter-element being disposed outside said belt to provide a contact area with the belt, such that the belt and the counter-element establish therebetween a web processing zone for passing a web to be processed therethrough. The processing zone length is defined by the disposition of the belt's guiding element and/or by the configuration of the counter-elements. The contact pressure applied to a web in the processing zone is within the range of between about 0.01 MPa and about 200 MPa.Type: GrantFiled: January 29, 2003Date of Patent: April 27, 2010Assignee: Metso Paper, Inc.Inventors: Juha Lipponen, Vilho Nissinen, Pekka Koivukunnas, Mika Viljanmaa, Henri Vaittinen, Reijo Pietikäinen, Kari Hasanen, Risto Sutti, Eero Suomi, Pekka Linnonmaa, Markku Kyytsönen, Matti Tervonen, Heikki Kettunen, Kari Holopainen -
Patent number: 7413632Abstract: A calender includes at least two roll stacks which each have at least three rolls, and in each of which the web path of a fibrous web meanders between each roll pair of the stack. In order to produce a selectable fibrous web grade, the web is passed between each roll pair of each stack, so that at least one roll pair in at least one stack is in nip contact to form a nip that calenders the web. The web runs between each roll pair of each roll stack and, in order to produce a selectable fibrous web grade, a selectable number of rolls is in nip contact with each other in each stack to form at least one nip that calenders the fibrous web.Type: GrantFiled: December 16, 2003Date of Patent: August 19, 2008Assignee: Metso Paper, Inc.Inventors: Markku Kyytsönen, Pekka Linnonmaa
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Patent number: 7407562Abstract: The moisture profile and/or moisture gradient of a paper web of at least SC quality paper is controlled in a paper machine comprising a calender (1) which has at least two roll stacks (21, 22; 31, 32), one stack has at least three rolls and another has at least five rolls. The web is moisturized to a desired pre-moisture content M1 by a pre-moisturizer (7) before the calender. At least one intermediate moisturizer (3) is arranged between two roll stacks moisturizes the web to a desired intermediate moisture content M2 before the last roll stack (31, 32), in which the web is dried to a desired final moisture value M3. For continuously controlling and optimizing the moisture profile and/or moisture gradient of the web, the pre-moisturizing W1 of the web is controlled by a pre-moisturizer (7) control parameter which corresponds to the final moisture value M3 of the web.Type: GrantFiled: June 16, 2003Date of Patent: August 5, 2008Assignee: Metso Paper, Inc.Inventors: Antti Heikkinen, Harri Kuosa, Pekka Linnonmaa, Hannu Lätti, Markku Kyytsönen, Markko Jaakkola
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Patent number: 7387064Abstract: A paper web moistened in a paper machine and reeled on a machine reel is calendered in a multinip calender arranged apart from the paper machine, whose roll assembly is formed of a first set of rolls and a second set of rolls in the travel direction of the paper web. At least one surface of the paper web is moistened with at least one pre-moisturizer, whereafter the paper web is guided to the first calender nip of the first set of rolls and one surface of the paper web is moistened with at least one intermediate moisturizer, whereafter the paper web is guided to the first calender nip of the second set of rolls, wherein a paper web having a roughness of 1.0-1.1 ?m and/or gloss of 54-57% or 56-60% is produced as a result of calendering.Type: GrantFiled: March 11, 2005Date of Patent: June 17, 2008Assignee: Metso Paper, Inc.Inventors: Pekka Linnonmaa, Hannu Lätti, Markku Kyytsönen
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Publication number: 20070125245Abstract: A paper web moistened in a paper machine and reeled on a machine reel is calendered in a multinip calender arranged apart from the paper machine, whose roll assembly is formed of a first set of rolls and a second set of rolls in the travel direction of the paper web. At least one surface of the paper web is moistened with at least one pre-moisturizer, whereafter the paper web is guided to the first calender nip of the first set of rolls and one surface of the paper web is moistened with at least one intermediate moisturizer, whereafter the paper web is guided to the first calender nip of the second set of rolls, wherein a paper web having a roughness of 1.0-1.1 ?m and/or gloss of 54-57% or 56-60% is produced as a result of calendering.Type: ApplicationFiled: March 11, 2005Publication date: June 7, 2007Inventors: Pekka Linnonmaa, Hannu Latti, Markku Kyytsonen
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Publication number: 20060118259Abstract: The moisture profile and/or moisture gradient of a paper web of at least SC quality paper is controlled in a paper machine comprising a calender (1) which has at least two roll stacks (21, 22; 31, 32), one stack has at least three rolls and another has at least five rolls. The web is moisturized to a desired pre-moisture content M1 by a pre-moisturizer (7) before the calender. At least one intermediate moisturizer (3) is arranged between two roll stacks moisturizes the web to a desired intermediate moisture content M2 before the last roll stack (31, 32), in which the web is dried to a desired final moisture value M3. For continuously controlling and optimizing the moisture profile and/or moisture gradient of the web, the pre-moisturizing W1 of the web is controlled by a pre-moisturizer (7) control parameter which corresponds to the final moisture value M3 of the web.Type: ApplicationFiled: June 16, 2003Publication date: June 8, 2006Inventors: Antti Heikkinen, Harri Kuosa, Pekka Linnonmaa, Hannu Latti, Markku Kyytsonen, Markko Jaakkola
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Patent number: 7017477Abstract: A method and arrangement for computing and regulating distribution of linear load in a multi-nip calender. A material web is passed through the nips in a set of rolls including a variable-crown upper roll, a variable-crown lower roll and intermediate rolls positioned between the upper and lower rolls. The rolls in the set of rolls are supported so that, when the nips are closed, the bending lines of the rolls are curved downwards. When computing and regulating the linear loads, one or more of the physical properties affecting the bending of each intermediate roll under load, such as bending rigidity, mass, shape, and material properties, are taken into account. The ratio of the linear loads applied to the intermediate rolls, the weight of the rolls per se, and/or the support forces applied to the rolls are regulated so that the set of rolls is in a state of equilibrium and a predetermined state of deflection.Type: GrantFiled: May 3, 1999Date of Patent: March 28, 2006Assignee: Metso Paper, Inc.Inventors: Mika Viljanmaa, Pekka Linnonmaa, Ilkka Hiirsalmi, Pekka Koivukunnas, Tapio Mäenpää, Erkki Leinonen, Pekka Kivioja, Juha Ehrola
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Publication number: 20060060322Abstract: A processing device and a method applying the same for processing a coated or uncoated fibrous web is provided. The device comprises a belt configured to extend around a guiding element, at least one counter-element being disposed outside said belt to provide a contact area with the belt, such that the belt and the counter-element establish therebetween a web processing zone for passing a web to be processed therethrough. The processing zone length is defined by the disposition of the belt's guiding element and/or by the design of the counter-elements. A contact pressure applied to a web in the processing zone is configured to be within the range of between about 0.01 MPa and about 70 MPa.Type: ApplicationFiled: January 29, 2003Publication date: March 23, 2006Inventors: Mika Viljanmaa, Juha Lipponen, Vilho Nissinen, Pekka Koivukunnas, Henri Vaittinen, Reijo Pietikainen, Kari Hasanen, Risto Sutti, Matti Lares, Pekka Linnonmaa, Markku Kyytsonen, Matti Tervonen, Heikki Kettunen, Kari Holopainen
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Patent number: 7008510Abstract: An arrangement in tail threading in a multinip calender of a paper machine comprises rolls that form nips, extraction rolls as well as tail threading apparatus for guiding the tail to be transferred during tail threading through the multinip calender. The arrangement includes a holding point adapted prior to the last nip and a cutting device. The arrangement further includes a support device adapted at the holding point for supporting the tail during cutting.Type: GrantFiled: October 16, 2003Date of Patent: March 7, 2006Assignee: Metso Paper, Inc.Inventors: Ismo Kallio, Juha Laitio, Pekka Linnonmaa
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Publication number: 20060042479Abstract: A calender includes at least two roll stacks which each have at least three rolls, and in each of which the web path of a fibrous web meanders between each roll pair of the stack. In order to produce a selectable fibrous web grade, the web is passed between each roll pair of each stack, so that at least one roll pair in at least one stack is in nip contact to form a nip that calenders the web. The web runs between each roll pair of each roll stack and, in order to produce a selectable fibrous web grade, a selectable number of rolls is in nip contact with each other in each stack to form at least one nip that calenders the fibrous web.Type: ApplicationFiled: December 16, 2003Publication date: March 2, 2006Applicant: Metso Paper, Inc.Inventors: Markku Kyytsonen, Pekka Linnonmaa
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Processing device and method of operating the device for processing a coated or uncoated fibrous web
Publication number: 20050251977Abstract: A processing device and method applying the same for processing a coated or uncoated fibrous web is provided. The device comprises a belt configured to extend around a guiding element, at least one counter-element being disposed outside said belt to provide a contact area with the belt, such that the belt and the counter-element establish therebetween a web processing zone for passing a web to be processed therethrough. The processing zone length is defined by the disposition of the belt's guiding element and/or by the configuration of the counter-elements. The contact pressure applied to a web in the processing zone is within the range of between about 0.01 MPa and about 200 MPa.Type: ApplicationFiled: January 29, 2003Publication date: November 17, 2005Inventors: Juha Lipponen, Vilho Nissinen, Pekka Koivukunnas, Mika Viljanmaa, Henri Vaittinen, Reijo Pietikainen, Kari Hasanen, Risto Sutti, Eero Suomi, Pekka Linnonmaa, Markku Kyytsonen, Matti Tervonen, Heikki Kettunen, Kari Holopainen -
Patent number: 6905575Abstract: In a paper/board or finishing/converting machine, a calender (1) comprises a number of rolls (2, 3) formed into a roll stack, and a number of lift-out rolls (4), which are arranged in such a way that the web (W) being treated travels from one calender (1) nip (N) to another via a lift-out roll (4). Between the calender (1) roll (2, 3) and the lift-out roll (4), the web (W) being treated is supported by means of at least one closing member (5, 5?, 6) not extending through the nip (N), which closing member is formed by a belt, wire or metal wire (7), which is arranged to travel via two or more guide rolls (4, 8).Type: GrantFiled: June 20, 2001Date of Patent: June 14, 2005Assignee: Metso Paper, Inc.Inventors: Pekka Linnonmaa, Antti Heikkinen
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Patent number: 6905573Abstract: The surface of a web is monitored by a fault detection system (20), a machine condition monitoring system, a quality measurement system, a web moisture measurement and/or a web temperature measurement and the soiled part of the surface of the roll is detected and localized by means of a soiling monitoring apparatus (31, 35; 60). A control system (41) controls a cleaning device (40) to remove the detected soiling. As a web (W) travels in a paper or board production or finishing process or in finishing machinery the web and/or the surface of the roll is monitored and after a detected deviation the surface thereof is momentarily spread with a liquid while machinery is running at the same time as the web (W) travels over said roll surface.Type: GrantFiled: September 6, 2001Date of Patent: June 14, 2005Assignee: Metso Paper, Inc.Inventors: Tapio Mäenpää , Timo Vuorimies, Pekka Koivukunnas, Aaron Mannio, Olli-Pekka Väkevä , Kari Hasanen, Tarja Hanska, Pekka Linnonmaa, Markku Kyytsönen, Helena Leppäkoski, Markus Laitila, Markku Kojo, Toni Seppänen, Marjaana Toppila
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Publication number: 20050098284Abstract: In the method for treating the surface of the web, liquid is added on the surface of a paper or paperboard web (W), possibly with other constituents. The absorbency of the surface of the paper or paperboard web is increased before liquid is brought on the surface of the web or simultaneously with bringing the liquid on the surface of the web. The method is used for wetting the surface of the web before calendering, or for coating the web in surface sizing or pigmenting. The absorbency of the surface is increased before bringing the liquid for example by means of a corona treatment, a flame treatment, an ozonization or by adding steam.Type: ApplicationFiled: August 20, 2004Publication date: May 12, 2005Inventors: Antti Heikkinen, Mikko Tani, Pekka Linnonmaa
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Patent number: 6881301Abstract: A method and an arrangement for controlling evaporation and moisture in a multinip calender (10) when a continuous fibrous web (W) is calendered in calendering nips (1,_2,—3,—4,—5) placed one after the other before the fibrous web is wound on a reel-up/winder (9). With a view to making the net evaporation from and the final moisture content of the web (W) constant when the running situations in the calender (10) change, the web is passed in the calender from the outlet of at least one nip into an air-float chamber (20) of the turning airborne type.Type: GrantFiled: April 3, 2001Date of Patent: April 19, 2005Assignee: Metso Paper, Inc.Inventors: Antti Heikkinen, Pekka Linnonmaa, Reijo Pietikäinen
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Patent number: 6848357Abstract: A method for controlling the temperature of a heated roll in a calender is provided. The calender comprises at least one heated roll or thermoroll and at least one backing roll, between which is formed a nip through which the material web is conveyed. To the heated roll is supplied internal thermal power by internal heating means of the roll, and external thermal power by external heating means of the roll. Before changing the heated roll, internal thermal power is minimized within a specific period by control means provided in conjunction with the internal heating means; external thermal power is maximized within a specific period by control means provided in conjunction with the external heating means; and the surface temperature of and/or the thermal power released by the heated roll, which corresponds to the surface temperature and/or thermal power desired for the grade of the material web, is maintained within a specific period.Type: GrantFiled: February 13, 2003Date of Patent: February 1, 2005Assignee: Metso Paper, Inc.Inventors: Pekka Linnonmaa, Juhani Partanen
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Publication number: 20040250974Abstract: An arrangement in tail threading in a multinip calender of a paper machine comprises rolls that form nips, extraction rolls as well as tail threading apparatus for guiding the tail to be transferred during tail threading through the multinip calender. The arrangement includes a holding point adapted prior to the last nip and a cutting device. The arrangement further includes a support device adapted at the holding point for supporting the tail during cutting.Type: ApplicationFiled: October 16, 2003Publication date: December 16, 2004Inventors: Ismo Kallio, Juha Laitio, Pekka Linnonmaa
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Patent number: 6827010Abstract: A multi-roll calender for controlling the moisture gradient of a fibrous web and for enabling the manufacture of high quality paper grades, such as WFC, LWC-roto and SC-A by on- and off-line calendering. An on- or off-line multi-roll calender formed of separate sets of rolls is used for calendering, and the fibrous web (W) is subjected to intermediate moistening between the sets of rolls (A, B).Type: GrantFiled: October 27, 2003Date of Patent: December 7, 2004Assignee: Metso Paper, Inc.Inventors: Antti Heikkinen, Pekka Linnonmaa