Patents Assigned to Fracotyp-Postalia GmbH
  • Kit containing sealing liquid for safety closures
    Patent number: 9383322
    Abstract: A sealing liquid for sealing mail pieces contains water and a penetration agent. The sealing liquid is applied by letter-closing devices and franking machines containing such a sealing liquid. Once sealed, the opening of the letter produces a pronounced pattern so that it is clear that the letter has been opened. Therefore any attempts to reseal the once opened enveloped are easily detected.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: July 5, 2016
    Assignee: Fracotyp-Postalia GmbH
    Inventors: Thomas Gerhardt, Wolfgang Muhl