Patents by Inventor Theo Schmidt

Theo Schmidt 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: 5059034
    Abstract: Carrier bag with a closed top surface, in the area of which a handle is provided that is a single-piece construction, the two opposite long ends of which are sealed directly or indirectly to edges of the top surface.
    Type: Grant
    Filed: February 8, 1989
    Date of Patent: October 22, 1991
    Inventors: Gunter Schulz, Theo Schmidt
  • Patent number: 4995930
    Abstract: A process for the production of a film combination consisting of a perforated plastic film and a fibrous material, which are laminated together by means of the pneumatic vacuum used to perforate the film when it is in a thermoplastic condition.
    Type: Grant
    Filed: June 16, 1986
    Date of Patent: February 26, 1991
    Assignee: Lever Brothers Company
    Inventors: Winfried Merz, Theo Schmidt
  • Patent number: 4797246
    Abstract: A process is disclosed for the continuous manufacture of a perforated plastic film, where the plastic film is extruded directly from the extrusion unit either onto one roller of a pair of rollers or directly into the gap between a pair of rollers (a perforating/texturing roller and a back-up roller). The hot plastic film is perforated on a roller under the influence of a vacuum and shock cooling by the flow of cold air and the coolness of the back-up roller is carried out during the perforating step, and immediately thereafter. The film is preferably textured at the same time that it is perforated, the immediate cooling setting the texture in the film.
    Type: Grant
    Filed: January 25, 1984
    Date of Patent: January 10, 1989
    Inventors: Dietmar Reinke, Theo Schmidt
  • Patent number: 4248822
    Abstract: In the manufacture of a moisture-permeable covering film for absorbent material a thermoplastic film is provided with capillary-like protrusions by embossing, after which openings are produced in the ends of said protrusions. Embossing is effected with simultaneous cooling of the film, so that the ends of the protrusions are oriented in the thermo-elastic temperature range. By a renewed heating of the ends of the protrusions the openings are formed by shrinking, which also causes the edges of the openings to be thickened.The apparatus consists of an engraved metal cylinder and a counter-roller for the embossing step and of a heated roller, which is pressed against the ends of the embossed protrusions on the metal cylinder.
    Type: Grant
    Filed: February 12, 1979
    Date of Patent: February 3, 1981
    Assignee: Lever Brothers Company
    Inventor: Theo Schmidt