Patents by Inventor Alfred T. Nielsen

Alfred T. Nielsen 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).

  • Pressure roller apparatus for briquetting cut material of biological origin such as green crops, wood flakes or peat
    Patent number: 4552567
    Abstract: The rear end of a rotary drying drum (1) is provided with a peripheral channel (10) in which dried material to be briquetted, such as green crops, wood flakes or peat, is accumulated and carried along. The bottom of the channel (10) is formed by the inner periphery of a ring of dies (18), in which the formation of briquettes takes place by means of a pressure roller (17) operating in the channel (10) and compressing the material against the frictional resistance in the dies.The material has previously been precompressed by an endless band (19) likewise operating in the channel (10), which band preferably runs at the same peripheral speed as the pressure roller (17) and the inner side of the die ring (18).
    Type: Grant
    Filed: December 5, 1984
    Date of Patent: November 12, 1985
    Inventor: Alfred T. Nielsen