Patents by Inventor Alois Persch

Alois Persch 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: 4638917
    Abstract: The invention concerns a tamper proof closure for a threaded mouth. The closure comprises a plastic cap provided by means of tear-off elements with a ring. If when the mouth is sealed the ring is still on the cap, then it displays the fact it was not opened yet. The ring is secured against a screwing-off motion by lock elements at the mouth. The ring is provided with at least one aperture entered by a catch on the cap. When the cap is rotated off, the catch destroys the ring. This can be facilitated by providing predetermined rupture sites in the shape of narrow connection strips between certain ring parts.
    Type: Grant
    Filed: December 12, 1985
    Date of Patent: January 27, 1987
    Assignee: Zeller Plastik Koehn, Graebner & Co.
    Inventor: Alois Persch
  • Patent number: 4562931
    Abstract: The invention concerns an original-seal closure means made of plastic and for threaded mouths at containers, in particular bottles. The closure means includes a screw cap to which a hood is fastened with axial play. Studs are present at both the hood and the screw cap, which can be engaged and disengaged within the said axial play and which act as drive means. To secure the original seal, the screw cap is provided with tear-off elements which engage by means of claws underneath the retainer lip. When the mouth is sealed, the claws are held in this position by the hood. When the closure is opened the first time, the tear-off elements are perforce torn off. In additional child-proof design, a set of studs is designed in such a manner that they shall always act as drive means during the screwing shut process while they shall act thusly during unscrewing only if in addition to the torque an axial force is exerted toward the mouth.
    Type: Grant
    Filed: October 9, 1984
    Date of Patent: January 7, 1986
    Assignee: Zeller Plastik, Koehn, Grabner & Co
    Inventors: Ulrich Brach, Alois Persch