Patents by Inventor Roland Lofgren

Roland Lofgren 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).

  • METHOD OF DRYING A POLYMERIC MATERIAL
    Publication number: 20110225840
    Abstract: The method is for drying a material. A drying device is provided that has a heater disposed above a movable carrier and a fan device. The movable carrier carries the material to be dried. The material has a first temperature. A fluid, such as air is blown across the material by the fan device. The material is heated by the heater.
    Type: Application
    Filed: October 23, 2008
    Publication date: September 22, 2011
    Inventor: Roland Lofgren
  • Preheating and drying device
    Patent number: 6612049
    Abstract: The preheater and dryer device has a housing and a first collector is disposed inside the housing. A feeding device extends into the housing and contains a material to be dried and preheated. A movable and hollow central conduit extends from the upper end of the housing to a bottom portion of the first collector. The central conduit carries a hot and dry air into the housing. A first and a second conical shield are attached to the central conduit. The central conduit is movable between a first open position and a second closed position. The second conical shield is tightly held against the first collector to close the bottom opening thereof when the central conduit is in the second closed position and the second conical shield is separated from the first collector when the central conduit is in the first open position.
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: September 2, 2003
    Inventor: Roland Lofgren
  • Preheating and drying device
    Publication number: 20020162244
    Abstract: The preheater and dryer device has a housing and a first collector is disposed inside the housing. A feeding device extends into the housing and contains a material to be dried and preheated. A movable and hollow central conduit extends from the upper end of the housing to a bottom portion of the first collector. The central conduit carries a hot and dry air into the housing. A first and a second conical shield are attached to the central conduit. The central conduit is movable between a first open position and a second closed position. The second conical shield is tightly held against the first collector to close the bottom opening thereof when the central conduit is in the second closed position and the second conical shield is separated from the first collector when the central conduit is in the first open position to permit the material to flow through the bottom opening.
    Type: Application
    Filed: April 19, 2002
    Publication date: November 7, 2002
    Inventor: Roland Lofgren