Patents Assigned to Research Products Company
  • Patent number: 4215508
    Abstract: An apparatus and method for fumigating stored agricultural commodities such as grain and the like, includes an applicator for porous envelopes or sachets of prepackaged pesticides of the type which react with moisture in the air and produce a toxic gas. The applicator comprises an elongate strip constructed of a flexible, porous, non-hygroscopic material. The strip has two plies which are arranged in an overlying relationship and are interconnected along a side edge thereof, and includes a plurality of seams which extend laterally across the strip and regularly interconnect the plies, and form pockets shaped for receiving the prepackaged pesticide sachets therein. The seams form a flexible hinge between adjacent pockets and interconnect the same to facilitate folding. A sachet is inserted into each pocket, the pocket is closed, and the filled applicator is deployed onto the free surface of an aggregation of stored commodity and arranged in a flat and fully extended position thereover.
    Type: Grant
    Filed: September 28, 1978
    Date of Patent: August 5, 1980
    Assignee: Research Products Company
    Inventors: James R. Allen, Wolfgang F. Friemel
  • Patent number: 4191308
    Abstract: A tablet dispenser for fumigating agricultural commodities, such as grain, animal feed, and the like, comprises a container shaped to receive a plurality of pesticide tablets therein, and including a base with a dispenser aperture therethrough. A rotor is rotatively mounted in the container base, and includes an upper portion, a medial portion, and a lower portion. The medial portion of the rotor is spaced apart from the container sidewall, and forms an annularly shaped channel therebetween which is proportioned to receive therein a single file ring of the pesticide tablets, each oriented on a circumferential edge thereof. The lower portion of the rotor extends outwardly of the medial portion to form a base surface of the channel on which the tablets are supported, and includes a dispensing aperture therethrough positioned for selective alignment with the container base aperture.
    Type: Grant
    Filed: September 15, 1978
    Date of Patent: March 4, 1980
    Assignee: Research Products Company
    Inventors: James R. Allen, Alvin T. Hammes