Patents by Inventor Ilkka Alatalo

Ilkka Alatalo 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).

  • Filter bag for a machine screen
    Patent number: 5084174
    Abstract: A filter bag (1) for a disc-like filter, comprising filter surfaces (2) to be positioned on both sides of a filter element. The filter element is inserted into the filter bag, and the filter bag is heated so that the heated portion shrinks, thus tightening the filter bag around the filter element. The filter bag (1) is so shaped that the filter parts (2) to be positioned on both sides of the filter element are substantially of the same shape and size as the required filter surfaces. An edge part (3) of a material substantially impermeable to liquid and shrinkable at elevated temperature is attached to the edges of the filter parts.
    Type: Grant
    Filed: October 23, 1990
    Date of Patent: January 28, 1992
    Assignee: Tamfelt Oy AB
    Inventors: Aulis Perala, Matti Servo, Ilkka Alatalo