Patents by Inventor Jukka Vehmas
Jukka Vehmas 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: 11852413Abstract: The present disclosure relates to a tempering furnace for a glass sheet, which has a conveyor for the glass sheet, first convection blow means over the conveyor to heat the glass sheet by hot air jets blown on its top and/or bottom surface, and second convection blow means to help lead pressurized air from outside the tempering furnace to second blow nozzles from which air is discharged as jets towards the top and/or bottom surface of the glass sheet. The heating effect of the air jets on the glass sheet is adjustable by adjusting the feeding of electric current to electric elements inside blowing channels. Blow nozzles of the second convection blow means form blow zones. The heating effect on the glass sheet of the jets discharged from the second blow nozzles inside the blow zones is adjustable by adjusting the blowing pressure of feed pipes.Type: GrantFiled: March 18, 2020Date of Patent: December 26, 2023Assignee: GLASTON FINLAND OYInventors: Jukka Vehmas, Kyösti Keto
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Patent number: 11584676Abstract: A method for heat strengthening or tempering glass sheets of a glass load containing several glass sheets, in which the glass sheets are heated in a furnace to a tempering temperature and the glass load is transferred at a transfer speed (W) away from the furnace into a tempering unit, in which the actual quenching is conducted by blasting cooling air onto both surfaces of the glass sheets. By an initial blasting unit, located between the furnace and the quenching unit and divided into initial blasting zones in the direction transverse to the motion of the glass, is blasted compressed air onto the surface of the leading and trailing edges of a glass sheet, to the direction of which normal it is desired to straighten the end in order to decrease end-edge kink.Type: GrantFiled: June 13, 2018Date of Patent: February 21, 2023Assignee: GLASTON FINLAND OYInventors: Pekka Lyytikäinen, Jukka Vehmas
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Publication number: 20220315471Abstract: A tempering furnace for a glass sheet has a conveyor for the glass sheet, and first convection blow means over the conveyor to heat the glass sheet by hot air jets blown onto its top surface. With second convection blow means, pressurized air external to the tempering furnace may be led to second blow nozzles from which air is discharged as jets towards the bottom surface of the glass sheet. The heating effect of the air jets of the first convection blow means onto the glass sheet is adjustable by adjusting the feeding of electric current to electric elements inside blow enclosures, and the heating effect onto the glass sheet of the jets discharging from the second blow nozzles is adjustable by adjusting the blow pressure of feed pipes.Type: ApplicationFiled: June 25, 2020Publication date: October 6, 2022Applicant: Glaston Finland OyInventors: Jukka VEHMAS, Kyösti KETO
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Publication number: 20220146201Abstract: The present disclosure relates to a tempering furnace for a glass sheet, which has a conveyor for the glass sheet, first convection blow means over the conveyor to heat the glass sheet by hot air jets blown on its top and/or bottom surface, and second convection blow means to help lead pressurized air from outside the tempering furnace to second blow nozzles from which air is discharged as jets towards the top and/or bottom surface of the glass sheet. The heating effect of the air jets on the glass sheet is adjustable by adjusting the feeding of electric current to electric elements inside blowing channels. Blow nozzles of the second convection blow means form blow zones. The heating effect on the glass sheet of the jets discharged from the second blow nozzles inside the blow zones is adjustable by adjusting the blowing pressure of feed pipes.Type: ApplicationFiled: March 18, 2020Publication date: May 12, 2022Applicant: Glaston Finland OyInventors: Jukka VEHMAS, Kyösti KETO
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Publication number: 20200131070Abstract: A method for heat strengthening or tempering glass sheets of a glass load containing several glass sheets, in which the glass sheets are heated in a furnace to a tempering temperature and the glass load is transferred at a transfer speed (W) away from the furnace into a tempering unit, in which the actual quenching is conducted by blasting cooling air onto both surfaces of the glass sheets. By an initial blasting unit, located between the furnace and the quenching unit and divided into initial blasting zones in the direction transverse to the motion of the glass, is blasted compressed air onto the surface of the leading and trailing edges of a glass sheet, to the direction of which normal it is desired to straighten the end in order to decrease end-edge kink.Type: ApplicationFiled: June 13, 2018Publication date: April 30, 2020Applicant: Glaston Finland OyInventors: Pekka LYYTIKÄINEN, Jukka VEHMAS
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Patent number: 9617181Abstract: The invention relates to a method of heating a glass sheet for tempering. It comprises conveying the glass sheet on top of rollers in a roller-hearth furnace, heating the glass sheet in the roller-hearth furnace to a transfer temperature at which the glass sheet is transferred into an air support furnace. The glass sheet, while resting on an air cushion, is carried on an air support table and the glass sheet is heated in the air support furnace to a tempering temperature. The transfer temperature is not lower than 620° C. and not higher than 675° C. and the tempering temperature is not lower than 650° C. and not higher than 720° C.Type: GrantFiled: July 27, 2015Date of Patent: April 11, 2017Assignee: GLASTON FINLAND OYInventors: Jukka Vehmas, Harri Kylväjä, Mikko Rantala
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Publication number: 20170029314Abstract: The invention relates to a method of heating a glass sheet for tempering. It comprises conveying the glass sheet on top of rollers in a roller-hearth furnace, heating the glass sheet in the roller-hearth furnace to a transfer temperature at which the glass sheet is transferred into an air support furnace. The glass sheet, while resting on an air cushion, is carried on an air support table and the glass sheet is heated in the air support furnace to a tempering temperature. The transfer temperature is not lower than 620° C. and not higher than 675° C. and the tempering temperature is not lower than 650° C. and not higher than 720° C.Type: ApplicationFiled: July 27, 2015Publication date: February 2, 2017Applicant: GLASTON FINLAND OYInventors: Jukka VEHMAS, Harri KYLVÄJÄ, Mikko RANTALA
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Patent number: 9493373Abstract: An apparatus for conveying glass sheets on an air support table, which is included in a heating furnace and provided with blast apertures and exhaust apertures, and in which the blast apertures are connected to a plenum chamber present underneath the air support table. The exhaust apertures are connected to exhaust passages present inside the table. The exhaust passages have at least one of their ends provided with a gate/gates capable of being opened and closed, by means of which the flow of air from the exhaust passages' ends adjacent to the gate/gates can be completely or partially blocked.Type: GrantFiled: September 30, 2014Date of Patent: November 15, 2016Assignee: GLASTON FINLAND OYInventors: Mikko Rantala, Harri Kylväjä, Jukka Vehmas
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Publication number: 20160289112Abstract: An apparatus for conveying glass sheets on an air support table of a heating furnace, the table having blast apertures and exhaust apertures. The blast apertures are connected to a plenum chamber under the air support table. The exhaust apertures are connected to exhaust passages inside the table, the first end of the passages opening into the furnace or being provided with a closable and openable closing gate. The second end of the exhaust passages opens into a suction duct or is provided with a closable and openable barrier gate. The suction duct of the blower is on the opposite side of the air support table to the conveyor which is in contact with the glass. In the suction duct between the exhaust passages and the blower is at least one adjustable bypass gate which is used for adjusting the air support of the glass.Type: ApplicationFiled: April 2, 2015Publication date: October 6, 2016Applicant: GLASTON FINLAND OYInventors: Mikko RANTALA, Harri KYLVAJA, Jukka VEHMAS, Kyosti KETO
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Publication number: 20150096331Abstract: An apparatus for conveying glass sheets in an air support table, which is included in a heating furnace and provided with blast apertures and exhaust apertures, and in which the blast apertures are connected to a plenum chamber present underneath the air support table. The exhaust apertures are connected to exhaust passages present inside the table. The exhaust passages have at least one of their ends provided with gate/gates capable of being opened and closed, by means of which the flow of air from the exhaust passages' ends adjacent to the gate/gates can be completely or partially blocked.Type: ApplicationFiled: September 30, 2014Publication date: April 9, 2015Inventors: Mikko RANTALA, Harri Kylväjä, Jukka Vehmas
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Patent number: 8997521Abstract: A method and apparatus for supporting and heating glass sheets for tempering or bending on a hot gas cushion. One edge of the glass is supported on transport rollers and the rotation axes of the rollers are transverse relative to the plane of the glass. The glass sheet is supported by means of gas pressure on a planar surface which has an angle of inclination of 2-20° relative to horizontal plane. The angle of inclination is sloping towards that edge of the glass which is supported by the transport rollers. Gas is expelled through the planar surface by way of gas outlet slots or holes. As the glass is moving, a gas is drawn or blown by fans from a certain part of the glass through the planar surface more than from the rest of the area by adjusting the rotating speed of the fans or by changing the suction pressure or delivery side pressure of the fans.Type: GrantFiled: January 6, 2011Date of Patent: April 7, 2015Assignee: Glaston Services Ltd. OyInventors: Jukka Vehmas, Mikko Rantala
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Publication number: 20150082834Abstract: A method and apparatus for tempering glass sheets. The glass sheets are heated to a tempering temperature in a furnace, in which the glass sheets are moved back and forth while supported upon rolls. The heated glass sheets are fed into a quench unit which is divided into two quenching zones with separately controlled blasting pressures. The glass sheets are driven without stopping through the first quenching zone into the second quenching zone, in which the glass is moved back forth upon the rolls. In the first quenching zone, cooling air is blasted onto glass sheet surfaces with slit nozzles. In the second quenching zone, cooling air is blasted onto glass sheet surfaces with hole-type nozzles.Type: ApplicationFiled: September 25, 2014Publication date: March 26, 2015Applicant: Glaston Finland OyInventors: Jukka VEHMAS, Tarmo PESONEN
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Patent number: 8650911Abstract: Glass is heated from above and below while the glass resides on rolls (3) in a tempering furnace (1). The upper surface of the glass (4) is heated by hot air jets formed by sucking air from inside the furnace (1) and pressurizing the hot air and recycling it back to the upper surface of the glass. Air which has been taken from outside the furnace (1) and pressurized by a compressor (17) and heated is blown to the lower surface of the glass.Type: GrantFiled: June 12, 2013Date of Patent: February 18, 2014Assignee: Uniglass Engineering OyInventor: Jukka Vehmas
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Publication number: 20130291600Abstract: Glass is heated from above and below while the glass resides on rolls (3) in a tempering furnace (1). The upper surface of the glass (4) is heated by hot air jets formed by sucking air from inside the furnace (1) and pressurizing the hot air and recycling it back to the upper surface of the glass. Air which has been taken from outside the furnace (1) and pressurized by a compressor (17) and heated is blown to the lower surface of the glass.Type: ApplicationFiled: June 12, 2013Publication date: November 7, 2013Applicant: UNIGLASS ENGINEERING OYInventor: Jukka VEHMAS
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Patent number: 8479540Abstract: Glass is heated from above and below while the glass resides on rolls (3) in a tempering furnace (1). The upper surface of the glass (4) is heated by hot air jets formed by sucking air from inside the furnace (1) and pressurizing the hot air and recycling it back to the upper surface of the glass. Air which has been taken from outside the furnace (1) and pressurized by a compressor (17) and heated is blown to the lower surface of the glass.Type: GrantFiled: June 9, 2004Date of Patent: July 9, 2013Assignee: Uniglass Engineering OyInventor: Jukka Vehmas
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Publication number: 20110167871Abstract: A method and apparatus for supporting and heating glass sheets for tempering or bending on a hot gas cushion. One edge of the glass is supported on transport rollers and the rotation axes of the rollers are transverse relative to the plane of the glass. The glass sheet is supported by means of gas pressure on a planar surface which has an angle of inclination of 2-20° relative to horizontal plane. The angle of inclination is sloping towards that edge of the glass which is supported by the transport rollers. Gas is expelled through the planar surface by way of gas outlet slots or holes. As the glass is moving, a gas is drawn or blown by fans from a certain part of the glass through the planar surface more than from the rest of the area by adjusting the rotating speed of the fans or by changing the suction pressure or delivery side pressure of the fans.Type: ApplicationFiled: January 6, 2011Publication date: July 14, 2011Applicant: GLASTON SERVICES LTD. OYInventors: Jukka VEHMAS, Mikko Rantala
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Publication number: 20100251773Abstract: The present invention relates to a method of heating a glass panel. The method comprises conveying the glass panel through a tempering furnace, in which tempering furnace the glass panel is heated with radiation heaters and overhead convection blasting means extending crosswise of the tempering furnace. Hot air is drawn from inside the furnace and delivered back onto the glass panel's top surface. The glass panel is heated with overhead convection blasting means extending lengthwise of the tempering furnace and capable of pressurizing air outside the tempering furnace, heating the air by directing it into the tempering furnace, and that the heated air is delivered onto the glass panel's top surface. In addition, the invention relates to an apparatus applying the method.Type: ApplicationFiled: October 24, 2008Publication date: October 7, 2010Applicant: Uniglass Engineering OyInventor: Jukka Vehmas
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Publication number: 20080072625Abstract: Sheets of glass (3) are heated in a tempering furnace. The furnace comprises rollers (2) to carry and transfer the glass sheets (3). During the heating, the glass sheets (3) are oscillated, i.e. they are moved back and forth, by means of the rollers (2). The rollers (2) are controlled by a control device (6). The control device (6) is used for configuring a first turning point of oscillation (t1) to take place more than 20 seconds after a starting time of heating (t0).Type: ApplicationFiled: September 6, 2005Publication date: March 27, 2008Applicant: Uniglass Engineering OyInventors: Jukka Vehmas, Olli Jarvinen
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Patent number: 7059155Abstract: A method of bending glass, in which glass (5) is heated in a bending furnace (1). After the heating, the glass (5) is transferred onto a mold (7). The glass-bending mold (7) is at at least one point arranged to be bent substantially in its entirety when the mold (7) is transferred from the position it had during the initial heating of the glass (5) into a position where the glass (5) is arranged upon the mold (7).Type: GrantFiled: April 23, 2002Date of Patent: June 13, 2006Assignee: Uniglass Engineering OYInventors: Jukka Vehmas, Juha Paavola, Antti-Jussi Numminen
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Patent number: 6881931Abstract: A method and apparatus for heating glass, in which glass (4) is heated upon rollers (3) in a tempering furnace (1) from above and below of the glass (4). At least the upper surface of the glass (4) is heated with hot air jets directed substantially perpendicularly relative to the surface of the glass (4). The air jets have been provided by sucking air mainly from the inside of the furnace and by pressurizing the air taken from the inside of the tempering furnace (1) to an overpressure of over 0.1 bar relative to the pressure in the tempering furnace (1).Type: GrantFiled: June 30, 2004Date of Patent: April 19, 2005Assignee: Uniglass Engineering OyInventors: Jukka Vehmas, Jorma Valkama