Patents by Inventor Hartmut Wurster

Hartmut Wurster 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: 6413370
    Abstract: A coated roll printing paper for printing with the cold-set offset-printing process is described, which gives a printing result comparable with that of low-weight coated matte grades. The paper is characterized by a high proportion of a fine calcium carbonate in the coating pigment, and a relatively low proportion of highly active binders.
    Type: Grant
    Filed: August 7, 2000
    Date of Patent: July 2, 2002
    Assignee: Haindl Papier GmbH
    Inventors: Hartmut Wurster, Hans-Peter Hofmann
  • Patent number: 6391155
    Abstract: A lightweight, coated web printing paper is described which is suitable for use in the cold-set printing process, which has specific values for water penetration and ink absorption and has gloss values of at least 20% for a smoothness in the range of 200 to 600 sec. Bekk.
    Type: Grant
    Filed: September 5, 2000
    Date of Patent: May 21, 2002
    Assignee: Haindl Papier GmbH
    Inventors: Hartmut Wurster, Hans-Peter Hofmann
  • Patent number: 6197155
    Abstract: A lightweight, coated web printing paper is described for suitability in the cold-set printing process, which has specific values for water penetration and ink absorption and has gloss values in the 40-50% range for a smoothness in the range of 500 sec. Bekk.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: March 6, 2001
    Assignee: Haindl Papier GmbH
    Inventors: Hartmut Wurster, Hans-Peter Hofmann
  • Patent number: 5916420
    Abstract: The present invention relates to a thin printing paper with a weight per unit area in the range below 49 g/m.sup.2 and which contains wood and which is provided with surface pigmentation and which incorporates a mixture of a swellable coating silicate (sodium bentonite) and, for the remainder, conventional coating pigments as the pigment and which, in addition, contains only bonding agent that is a natural organic bonding agent, essentially starch. Even if only lightly calendered, the paper is equally well suited for rotogravure printing and for rotary offset printing. It is preferred that the paper also contain a proportion of processed fibres obtained from old-paper.
    Type: Grant
    Filed: September 12, 1995
    Date of Patent: June 29, 1999
    Assignee: Haindl Papier GmbH
    Inventors: Hartmut Wurster, Hans-Peter Hofmann