Patents by Inventor Antti K. Viljanmaa

Antti K. Viljanmaa 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: 4507943
    Abstract: A drying press for hides, comprising two endless drying felts (1; 4) passed over rolls (2, 3; 5, 6), said felts being pressed against each other at press rolls (2, 5) to form a drying press gap for hides which are passed therethrough, as well as hide stretching means upstream of said gap. A problem to be solved is to provide such hide stretching means that can be used to effectively prevent the folding of the trailing edges of hides to be fed through a drying press. To solve this problem, there are an upper stretcher (8) and a lower stretcher (7) between which a hide (18) is passed while being lifted off a drying felt (1). Stretchers (7 and 8) press a hide therebetween with a suitable sliding fitness, said hide keeping taut and off a felt.
    Type: Grant
    Filed: September 2, 1982
    Date of Patent: April 2, 1985
    Inventor: Antti K. Viljanmaa
  • Patent number: 4335594
    Abstract: A hide stretching apparatus, in particular one for the tentering of hides for drying. The apparatus comprises a stretching frame (1) with a number of mutually spaced radial sliding guides (2). The stretching clamps (4) gripping the edges of the hide have been arranged to be reciprocatingly movable along the sliding guides (2). The stretching frame (1) is placed upon a special hide changing table (10) carrying under each sliding guide a clamp displacement member (12). The clamps (4) carry jaws (5 and 6) which attach to the edge of the hide (11) to be stretched. The jaws are opened and closed by means of a lever (9) turnably carried on the clamp. The clamp displacement member (12) has two gripping members (15, 18a) which can be made to engage the clamp (4) on both sides according to commands given, for the displacing of the clamps (4) reciprocatingly along the sliding guides (2).
    Type: Grant
    Filed: January 18, 1980
    Date of Patent: June 22, 1982
    Inventor: Antti K. Viljanmaa
  • Patent number: 4202190
    Abstract: A hide stretching apparatus, in particular one for the tentering of hides for drying. The apparatus comprises a stretching frame with a number of mutually spaced radial sliding guides. The stretching clamps gripping the edges of the hide have been arranged to be reciprocatingly movable along the sliding guides. The stretching frame is placed upon a special hide changing table carrying under each sliding guide a clamp displacement member. The clamps carry jaws which attach to the edge of the hide to be stretched. The jaws are opened and closed by means of a lever turnably carried on the clamp. The clamp displacement member has two gripping members, which can be made to engage the clamp on both sides according to commands given, for the displacing of the clamps reciprocatingly along the sliding guides. The clamp comprises a brake engaging with the sliding guide and which with the jaws in closed position prevents the displacement of the clamp towards the center of the stretching frame.
    Type: Grant
    Filed: September 6, 1978
    Date of Patent: May 13, 1980
    Inventor: Antti K. Viljanmaa