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).

  • Patent number: 9983086
    Abstract: 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: Grant
    Filed: January 13, 2015
    Date of Patent: May 29, 2018
    Assignee: Nip Control AB
    Inventor: Leif Cronvall
  • Publication number: 20160334296
    Abstract: 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: Application
    Filed: January 13, 2015
    Publication date: November 17, 2016
    Applicant: Nip Control AB
    Inventor: Leif Cronvall
  • Patent number: 8664601
    Abstract: 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: Grant
    Filed: April 16, 2009
    Date of Patent: March 4, 2014
    Assignee: Tetra Laval Holdings & Finance S.A.
    Inventors: Mats Bentmar, Leif Cronvall
  • Patent number: 8618484
    Abstract: 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: Grant
    Filed: October 5, 2009
    Date of Patent: December 31, 2013
    Assignee: Microfluid AB
    Inventor: Leif Cronvall
  • Publication number: 20120033200
    Abstract: 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: Application
    Filed: April 16, 2009
    Publication date: February 9, 2012
    Applicant: Tetra Laval Holdings & Finance S.A.
    Inventors: Mats Bentmar, Leif Cronvall
  • Patent number: 8049172
    Abstract: 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: Grant
    Filed: September 24, 2010
    Date of Patent: November 1, 2011
    Assignee: MicroFluid AB
    Inventor: Leif Cronvall
  • Publication number: 20110204238
    Abstract: 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: Application
    Filed: October 5, 2009
    Publication date: August 25, 2011
    Inventor: Leif Cronvall
  • Publication number: 20110183422
    Abstract: 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: Application
    Filed: June 29, 2009
    Publication date: July 28, 2011
    Applicant: REOSENSE AB
    Inventors: Leif Cronvall, Jonas Lundberg
  • Publication number: 20110062337
    Abstract: 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: Application
    Filed: September 24, 2010
    Publication date: March 17, 2011
    Inventor: Leif CRONVALL
  • Patent number: 7897922
    Abstract: 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: Grant
    Filed: May 22, 2003
    Date of Patent: March 1, 2011
    Assignee: MicroFluid AB
    Inventor: Leif Cronvall
  • Patent number: 5461219
    Abstract: 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: Grant
    Filed: June 11, 1993
    Date of Patent: October 24, 1995
    Assignee: Texas Instruments Incorporated
    Inventor: Leif Cronvall