Patents by Inventor Kurt Rochla

Kurt Rochla 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: 4106395
    Abstract: A web of bag-making material consists of a flattened tube or a single sheet that is longitudinally folded to double thickness. The bags are formed by providing the web with transverse weld seams at intervals and, adjacent to these seams, with lines of perforations extending parallel thereto. The web is then folded and, after folding, the individual bags are severed along the lines of perforations.
    Type: Grant
    Filed: November 17, 1976
    Date of Patent: August 15, 1978
    Assignee: Windmoller & Holscher
    Inventor: Kurt Rochla
  • Patent number: 4083747
    Abstract: A web of tubular or semi-tubular film is provided with transversely extending weld seams and lines of perforations to define bag sections and it is cooled while being fed to a severing and stacking station where the leading bag section is severed from the film and deposited on a stack of bag sections. The successively severed bag sections are deposited on a lowerable support up to a desired stacking height and they are clamped to the support alternately by a vertically reciprocatable punch and by being pressed against a clamping bar disposed above the support. Each bag is severed from the web of film under the action of lowering the punch and depressed by said punch until its margins come to lie under the clamping bar.
    Type: Grant
    Filed: December 2, 1976
    Date of Patent: April 11, 1978
    Assignee: Windmoller & Holscher
    Inventor: Kurt Rochla
  • Patent number: 3977152
    Abstract: Foldable sheet articles are packaged by forming a stack of the articles, folding the stack about a center line by exerting pressure from above the stack onto the center line, suspending a doubled-over web of packaging film by its edges below the stack, introducing the stack, fold line foremost, between the web edges from above in a direction at right-angles thereto and fully inserting it in the doubled web while supporting the lowermost web portion, welding the web shut by a seam at the edges and a separating weld seam perpendicular thereto while exerting pressure on the stack to expel air, and, simultaneously with the welding step, advancing the web so as to bring a succeeding length of web below a successive stack of sheet articles to be packaged.
    Type: Grant
    Filed: October 15, 1974
    Date of Patent: August 31, 1976
    Assignee: Windmoller & Holscher
    Inventors: Kurt Rochla, Horst Schneider, August Schwarzkopf