Patents by Inventor Leif Cronvall
Leif Cronvall 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: 9983086Abstract: The present invention concerns a calibration unit (1, 37) for a roller nip gauge. The roller nip gauge has sensors for length or force measurement. The calibration unit (1, 37) comprises an upper part (3) and a lower part (2). The calibration unit (1, 37) has means to place a part acting on a sensor element (26) of a sensor (25) during calibration in parallel with a surface (9) of the calibration unit (1, 37) receiving the sensor (25).Type: GrantFiled: January 13, 2015Date of Patent: May 29, 2018Assignee: Nip Control ABInventor: Leif Cronvall
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Publication number: 20160334296Abstract: The present invention concerns a calibration unit (1, 37) for a roller nip gauge. The roller nip gauge has sensors for length or force measurement. The calibration unit (1, 37) comprises an upper part (3) and a lower part (2). The calibration unit (1, 37) has means to place a part acting on a sensor element (26) of a sensor (25) during calibration in parallel with a surface (9) of the calibration unit (1, 37) receiving the sensor (25).Type: ApplicationFiled: January 13, 2015Publication date: November 17, 2016Applicant: Nip Control ABInventor: Leif Cronvall
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Patent number: 8664601Abstract: A system and a method for measuring the thickness of a layer of coating deposited on a substrate indirectly measures the thickness of the layer of coating on the substrate by measuring the thickness of layers of coating on a coating roller before and after the coating is transferred from the coating roller to the substrate. To measure the thickness of the layers of coating on the coating roller two sensors are used directed to respective layer on the coating roller. The sensors have IR radiators and IR detectors.Type: GrantFiled: April 16, 2009Date of Patent: March 4, 2014Assignee: Tetra Laval Holdings & Finance S.A.Inventors: Mats Bentmar, Leif Cronvall
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Patent number: 8618484Abstract: An apparatus for radiometric measurement of thin fluid films includes a housing (1) enclosing means of radiation, a radiation guide, a reflector (4) and one or more detectors (5). The means of radiation is normally an IR radiator (2). The radiation guide is either a radiation tube (3) or a radiation cone (7). The reflector (4) is of the type non-imagining optics. If there is more than one detector (5) normally at least one detector is a reference detector.Type: GrantFiled: October 5, 2009Date of Patent: December 31, 2013Assignee: Microfluid ABInventor: Leif Cronvall
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Publication number: 20120033200Abstract: A system and a method for measuring the thickness of a layer of coating deposited on a substrate indirectly measures the thickness of the layer of coating on the substrate by measuring the thickness of layers of coating on a coating roller before and after the coating is transferred from the coating roller to the substrate. To measure the thickness of the layers of coating on the coating roller two sensors are used directed to respective layer on the coating roller. The sensors have IR radiators and IR detectors.Type: ApplicationFiled: April 16, 2009Publication date: February 9, 2012Applicant: Tetra Laval Holdings & Finance S.A.Inventors: Mats Bentmar, Leif Cronvall
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Patent number: 8049172Abstract: Methods and devices relate to radiometric measurement of a thin fluid film (4) using absorption of IR radiation. At least one IR radiator (1) is directed to send signals to an IR detector (2) via a bed (3) on which the fluid film (4) is placed. The IR detector is set to receive IR radiation in a band around a characteristic absorption band of the fluid of the fluid film (4). The present invention is developed for printing presses, where the thickness of fountain solution on the printing plate and the proportion of printing ink in an emulsion of printing ink and fountain solution may be controlled.Type: GrantFiled: September 24, 2010Date of Patent: November 1, 2011Assignee: MicroFluid ABInventor: Leif Cronvall
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Publication number: 20110204238Abstract: An apparatus for radiometric measurement of thin fluid films includes a housing (1) enclosing means of radiation, a radiation guide, a reflector (4) and one or more detectors (5). The means of radiation is normally an IR radiator (2). The radiation guide is either a radiation tube (3) or a radiation cone (7). The reflector (4) is of the type non-imagining optics. If there is more than one detector (5) normally at least one detector is a reference detector.Type: ApplicationFiled: October 5, 2009Publication date: August 25, 2011Inventor: Leif Cronvall
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Publication number: 20110183422Abstract: A method for increasing productivity and quality in production of cured polymer by a real time measurement of the progress of curing, in a mould cavity, which being filled with a compound to be cured, wherein a signal is generated by a wave at an ultrasonic or equivalent frequency, which is transmitted through the mould cavity, the time for the wave to pass through the compound in the mould and back is detected, and the detected signal being analyzed in a suitable data processing computer , to establish a graph showing a relationship between the time for the wave to pass through the compound in the mould and back, and the time of the curing of the compound. The graph is used to determine a feature of the compound by identifying at least one specific parameter of the graph, and using said parameter to control the production.Type: ApplicationFiled: June 29, 2009Publication date: July 28, 2011Applicant: REOSENSE ABInventors: Leif Cronvall, Jonas Lundberg
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Publication number: 20110062337Abstract: Methods and devices relate to radiometric measurement of a thin fluid film (4) using absorption of IR radiation. At least one IR radiator (1) is directed to send signals to an IR detector (2) via a bed (3) on which the fluid film (4) is placed. The IR detector is set to receive IR radiation in a band around a characteristic absorption band of the fluid of the fluid film (4). The present invention is developed for printing presses, where the thickness of fountain solution on the printing plate and the proportion of printing ink in an emulsion of printing ink and fountain solution may be controlled.Type: ApplicationFiled: September 24, 2010Publication date: March 17, 2011Inventor: Leif CRONVALL
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Patent number: 7897922Abstract: The present invention relates to radiometric measurement of a thin fluid film using absorption of IR radiation. At least one IR radiator is directed to send signals to an IR detector via a bed on which the fluid film is placed. The IR detector is set to receive IR radiation in a band around a characteristic absorption band of the fluid of the fluid film. The invention is developed for printing presses, where the thickness of fountain solution on the printing plate and the proportion of printing ink in an emulsion of printing ink and fountain solution may be controlled.Type: GrantFiled: May 22, 2003Date of Patent: March 1, 2011Assignee: MicroFluid ABInventor: Leif Cronvall
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Apparatus and method for automated printing, reading, and dividing of information-carrying documents
Patent number: 5461219Abstract: An apparatus and method for automatically printing, reading and otherwise treating an information-carrying document, particularly apparatus having a mechanically dividable circular pathway for reading and otherwise processing ATB-ticket (Automated Ticket/Boarding document) at airport passenger gates, so-called gate readers (8), and a method in which such apparatus is used. The gate reader (8) includes a simple, dividable ticket cylinder (16) which lacks a casing and which includes a drive motor (9A), drive belts (9B, 9C), a first cog wheel (9D) which is firmly mounted on the body of the gate reader (8) and which functions to drive a second cog wheel (9E) mounted on one side of the drive wheel (22) and concentrical with the drive shaft (21).Type: GrantFiled: June 11, 1993Date of Patent: October 24, 1995Assignee: Texas Instruments IncorporatedInventor: Leif Cronvall