Patents by Inventor Dieter Groitzsch

Dieter Groitzsch 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: 7763339
    Abstract: A three-dimensionally structured fiber fabric has a high fluid absorption capacity of at least 5 g fluid per g of fiber fabric and elevations and depressions that occur alternately and regularly with reference to the fabric plane, which includes at least one nonwoven fabric layer and a shrunk fabric bonded to it. The bond between the nonwoven fabric layer and the shrunk fabric has been produced by hot bonding, and the hot bonding occurred at least perpendicular to the direction of the greatest shrinkage of the shrunk fabric, in the form of regularly arranged lines. Furthermore, spaces have formed between the nonwoven fabric layer and the shrunk fabric, at the alternately occurring elevations and depressions, which spaces promote the fluid absorption capacity of the fabric. These fabrics may be used as wiping cloths, wet wipes, as fluid dispensers for cleaning or for applying fluids, etc.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: July 27, 2010
    Assignee: Carl Freudenberg KG
    Inventors: Dieter Groitzsch, Oliver Staudenmayer
  • Patent number: 7008685
    Abstract: A laminate is claimed, having a first cover layer, a fabric with perforations as the middle layer, and a second cover layer, as are a method for its production and the use of the laminate as a fluid absorption and distribution layer made of a nonwoven fabric layer oriented in the Z direction, for absorbent hygiene articles. A three-dimensional form is achieved in that the fabric is present in the shrunk state in the middle layer, i.e. is brought into this state.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: March 7, 2006
    Assignee: Carl Freudenberg KG
    Inventors: Dieter Groitzsch, Gerhard Schaut
  • Publication number: 20040219854
    Abstract: A composite fabric and a method for manufacturing the composite fabric that includes at least one planar structure and at least one nonwoven fabric thermally bonded to the planar structure via a plurality of welds arranged in a predetermined pattern. A sheet of parallel elastic threads is disposed between the nonwoven fabric and the planar structure, wherein portions of the elastic threads are embedded in the plurality of welds in a stretched state. The composite fabric can be used for manufacturing hygienic products, in particular diapers, including diaper pants.
    Type: Application
    Filed: April 23, 2004
    Publication date: November 4, 2004
    Applicant: Carl Freudenberg KG
    Inventors: Dieter Groitzsch, Hansjoerg Grimm, Nikolaus Hirn, Eric Knehr
  • Patent number: 6723416
    Abstract: A three-dimensionally structured fibrous web made up of continuous-filament layers which alternate perpendicular to the surface plane, and denser short-fiber layers that are permanently thermally bonded in a continuous or spot-like manner to the filament layers, the wide-mesh continuous-filament layers representing a scrim, lattice, or netting, has on the short-fiber layers repeating, fold- or wave-shaped elevations. In the manufacturing process, all of the layers of the laminate are subjected together to a shrinkage process at a temperature which lies between the softening and melting points of the scrim material.
    Type: Grant
    Filed: August 22, 2001
    Date of Patent: April 20, 2004
    Assignee: Firma Carl Freudenberg
    Inventors: Dieter Groitzsch, Gerhard Schaut, Hans-Jörg Grimm
  • Patent number: 6647600
    Abstract: A hook and loop fastener for flat structures, particularly for textile products, having a hook part and an interlocking part, the interlocking part being made of a nonwoven composite having worked-in, textured, polymeric threads, the nonwoven composite being used as support for the textured threads, and the textured threads forming the loops for the hooks.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: November 18, 2003
    Assignee: Firma Carl Freudenberg
    Inventors: Manfred Jöst, Dieter Groitzsch, Gerhard Schaut
  • Publication number: 20030096548
    Abstract: A three-dimensionally structured fibrous fabric having elevations and depressions occurring regularly in alternation in relation to the surface plane, includes at least one nonwoven fabric layer and a shrunk fabric bonded thereto. In this context, the nonwoven fabric layer and the shrunk fabric were bonded by heat sealing performed at least perpendicular to the direction of the greatest shrinkage of the shrunk fabric in the form of lines. The fabric may be used as filter materials, in hygiene articles or as the mechanically sticking part of Velcro fasteners.
    Type: Application
    Filed: July 16, 2002
    Publication date: May 22, 2003
    Inventors: Dieter Groitzsch, Oliver Staudenmayer
  • Publication number: 20030077430
    Abstract: A nonwoven laminate material for mechanical closure systems, method for its production, and its use. The multi-layer nonwoven fabric laminate material has at least one layer of a polyolefin endless filament nonwoven fabric having a maximum tensile strength in the machine running direction that is at least as great as crosswise to that direction, and made up essentially of fibers having a titer of less than 4.5 dtex, as well as a second layer of a nonwoven fabric that is bonded to the first layer, which includes a sheet of crimped staple fibers made of polyolefins, and whose crimped fibers are coarser than the fibers of the nonwoven fabric of the first layer. The at least two nonwoven fabric layers are bonded to one another at the common interface by bonding in the form of a pre-determined pattern. With this laminate, it is possible to produce diapers that are also suitable for adult incontinence patients, which have a mechanical closure system, e.g., a Velcro™ closure.
    Type: Application
    Filed: October 15, 2002
    Publication date: April 24, 2003
    Inventors: Hansjorg Grimm, Dieter Groitzsch, Peter Adam
  • Publication number: 20030059587
    Abstract: A composite material, including at least one nonwoven fabric and a reinforcing material, thermally connected to it, situated in the form of regularly recurring patterns, which is derived from sheeting made of thermoplastic material. The new composite material may be used, for example, as an operating room coat, a textile outer material for one-time use, as a belt or in absorbent products, such as diapers or feminine hygiene products.
    Type: Application
    Filed: July 17, 2002
    Publication date: March 27, 2003
    Inventors: Hansjorg Grimm, Dieter Groitzsch, Marc Pehr
  • Publication number: 20030039807
    Abstract: A three-dimensionally structured fiber fabric has a high fluid absorption capacity of at least 5 g fluid per g of fiber fabric and elevations and depressions that occur alternately and regularly with reference to the fabric plane, which includes at least one nonwoven fabric layer and a shrunk fabric bonded to it. The bond between the nonwoven fabric layer and the shrunk fabric has been produced by hot bonding, and the hot bonding occurred at least perpendicular to the direction of the greatest shrinkage of the shrunk fabric, in the form of regularly arranged lines. Furthermore, spaces have formed between the nonwoven fabric layer and the shrunk fabric, at the alternately occurring elevations and depressions, which spaces promote the fluid absorption capacity of the fabric. These fabrics may be used as wiping cloths, wet wipes, as fluid dispensers for cleaning or for applying fluids, etc.
    Type: Application
    Filed: July 8, 2002
    Publication date: February 27, 2003
    Inventors: Dieter Groitzsch, Oliver Staudenmayer
  • Publication number: 20030026948
    Abstract: A laminate is claimed, having a first cover layer, a fabric with perforations as the middle layer, and a second cover layer, as are a method for its production and the use of the laminate as a fluid absorption and distribution layer made of a nonwoven fabric layer oriented in the Z direction, for absorbent hygiene articles.
    Type: Application
    Filed: May 29, 2002
    Publication date: February 6, 2003
    Inventors: Dieter Groitzsch, Gerhard Schaut
  • Patent number: 6448462
    Abstract: A medical bandaging material made of a microfilament nonwoven fabric with a mass per unit area of 30 to 150 g/m2 and a tear strength of >40 N/5 cm, the nonwoven fabric being made of continuous multicomponent filaments, melt-spun, stretched, and directly laid down to form a nonwoven fabric, having a titer of 1.5 to 5 dtex, and the continuous multicomponent filaments, after optional prebonding, being split, at least to the extent of 80%, into continuous microfilaments having a titer of 0.01 to 1.0 dtex and bonded.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: September 10, 2002
    Assignee: Firma Carl Freudenberg
    Inventors: Dieter Groitzsch, Gerhard Schaut
  • Patent number: 6403505
    Abstract: A composite material, including a laminate (1) made of a film (5) bonded to a nonwoven (7), wherein the nonwoven (7) and the film (5) are only bonded together at discrete points and the laminate (1) is stretched in at least one direction after being formed.
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: June 11, 2002
    Assignee: Firma Carl Freudenberg
    Inventors: Dieter Groitzsch, Engelbert Löcher, Bernhard Klein
  • Publication number: 20020034907
    Abstract: A voluminous non-woven fabric that has a textured yarn shot through it, at least in one preferential direction, where an endless filament and/or staple fiber non-woven fabric with a mass per unit area of 5 to 100 g/m2 has a textured multifilament yarn with a titer in the range of 10 to 400 dtex shot through it, and where the distance of the multifilament yarns from one another is 1 to 10/cm, and the mesh number is 0.5 to 8/cm, and the multifilament yarn threads are shrunk by 3 to 80%, using moist-thermal or wet-thermal treatment.
    Type: Application
    Filed: July 13, 2001
    Publication date: March 21, 2002
    Inventors: Dieter Groitzsch, Gerhard Schaut, Peter Adam
  • Publication number: 20010025153
    Abstract: A medical bandaging material made of a microfilament nonwoven fabric with a mass per unit area of 30 to 150 g/m2 and a tear strength of >40 N/5 cm, the nonwoven fabric being made of continuous multicomponent filaments, melt-spun, stretched, and directly laid down to form a nonwoven fabric, having a titer of 1.5 to 5 dtex, and the continuous multicomponent filaments, after optional prebonding, being split, at least to the extent of 80%, into continuous microfilaments having a titer of 0.01 to 1.0 dtex and bonded.
    Type: Application
    Filed: January 26, 2001
    Publication date: September 27, 2001
    Inventors: Dieter Groitzsch, Gerhard Schaut
  • Patent number: 6251479
    Abstract: Bodies containing superabsorber polymers, having superabsorber polymers bonded together with polymer fibers, wherein at least part of the superabsorber polymers are present as a microporous open-celled foam. The bodies are used for producing diapers, sanitary napkins, tampons and other articles of personal hygiene.
    Type: Grant
    Filed: January 19, 1999
    Date of Patent: June 26, 2001
    Assignee: Firma Carl Freudenberg
    Inventors: Dieter Groitzsch, Gerhard Schaut
  • Patent number: 5733826
    Abstract: An insole for shoes is a three-dimensionally shaped laminate composed of two adhesive-free formed fabrics, the formed fabric on the foot side being thin and abrasion-resistant, and the thicker formed fabric forming the base material of the insole consisting of staple fibers, having a composition of 50-60% by weight of core/sheath-polyester/copolyester fibers with a melting range of the core component of 255.degree.-260.degree. C. and of the sheath component of 110.degree.-140.degree. C., 5-15% by weight of high-shrinkage polyester fibers, and 25-40% by weight of absorbent fibers. The base material has a mass per unit area of 800-1200 g/m.sup.2 with a thickness of 0.70-0.85 cm.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: March 31, 1998
    Assignee: Firma Carl Freudenberg
    Inventor: Dieter Groitzsch
  • Patent number: 5172495
    Abstract: The invention refers to a lining material for shoes, comprising two to three layers of nonwoven fabric which are spot (heat) bonded together, wherein a wear resistant ply facing towards the foot (inside of the shoe) is comprised of synthetic fibers and that ply is adhered on its the side facing away from the foot to a moisture absorbent ply which contains about 30 to 70 wt. % cellulosic fibers.
    Type: Grant
    Filed: July 5, 1990
    Date of Patent: December 22, 1992
    Assignee: Firma Carl Freudenberg
    Inventors: Jurgen Fehlhaber, Ernst Pehr, Dieter Groitzsch
  • Patent number: 5158636
    Abstract: A microporous, polymeric film is prepared by dissolving methylene-chloride-soluble, film-forming polymers completely in methylene chloride. Then an aqueous phase is prepared containing non-methylene-chloride-soluble, water-soluble thickeners and, if desired, additives, and brought to a viscosity of about 0.07 to 0.5 Pa s. The aqueous phase is then dispersed in the polymer solution and the resultant paste is spread onto a support material or intermediate support, the methylene chloride is evaporated, the resultant membrane is transferred to the actual support, and finally the water is removed by drying.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: October 27, 1992
    Assignee: Firma Carl Freudenberg
    Inventors: Dieter Groitzsch, Akinori Minami, Gerhard Schaut
  • Patent number: 4938901
    Abstract: Disclosed is a process for producing a surgical sponge which contains contrast agent embedded in a polymer matrix in proportions of up to 70 wt. %. The matrix consists of a polymer material free of plasticizers. In the process for the production of the sponge a matrix for the contrast agent is used, which is an uncrosslinked, viscous liquid, prepolymer state until after it has been extruded onto the basic fleece material, and not until a process step that then follows is the polymerization completed.
    Type: Grant
    Filed: September 2, 1988
    Date of Patent: July 3, 1990
    Assignee: Firma Carl Freudenberg
    Inventors: Dieter Groitzsch, Bernhard Klein, Gerhard Schaut
  • Patent number: 4731277
    Abstract: Disclosed is a nonwoven, textile sponge for use in medical and hygienic applications consisting of at least one outer, thermally consolidated, moisture-repellent fiber layer containing at least 80% synthetic heterofil filaments and at least one layer of absorbent fibers. The sponge is perforated, but does not have any substantial fiber entanglement, and contains no binding agent of any kind. Also disclosed is a method for the manufacture of the sponge, in which the fiber nonwovens are laid one on the other, hydraulically perforated without fiber entanglement, and then thermally consolidated through heterofil filaments.
    Type: Grant
    Filed: June 27, 1986
    Date of Patent: March 15, 1988
    Assignee: Firma Carl Freudenberg
    Inventors: Dieter Groitzsch, Hans-Jurgen Kuhlwein