Patents by Inventor Ewald Schafer

Ewald Schafer 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: 4699133
    Abstract: The invention relates to a cohesive, self-adhesive, rigid or elastic bandage for fixing, compression and support dressings and permanent elastic compression and support dressings for medical purposes and a process for the manufacture thereof. The bandage comprises a web of warp and weft threads or warp threads in the form of a woven fabric having a porous structure and an amount of ultra fine particles of an adhesive, such as a rubber adhesive, distributed over and bonded to both the exposed surfaces of the warp and weft threads to provide adhesive particles bonded to the threads on both sides of the fabric. The adhesive particles are uniformly distributed over both bandage surfaces without the fiber groups adhering to one another or to the projecting fiber ends of the two surfaces, the particles being of a size distribution and amount sufficient to provide adhesion between overlying bandage surfaces without substantially reducing the porosity and elasticity of the fabric.
    Type: Grant
    Filed: May 23, 1985
    Date of Patent: October 13, 1987
    Assignee: Firma Karl Otto Braun KG
    Inventors: Ewald Schafer, Harald Jung
  • Patent number: 4542739
    Abstract: An elastic, non-sticking wound textile formed of a highly elastic knitted fabric with a mesh-forming thread of a completely synthetic material facing the wound and highly absorbent yarns incorporated as the weft.
    Type: Grant
    Filed: January 18, 1983
    Date of Patent: September 24, 1985
    Assignee: Firma Karl Otto Braun Kg
    Inventors: Ewald Schafer, Harald Jung
  • Patent number: 4476697
    Abstract: The invention relates to a wound dressing which prevents or at least reduces sticking of the dressing to the surface of the wound due to contact with moisture from the wound and which without the use of over twisted threads has a controllable lifting action and an excellent secretion-absorbing action, whereby cutting of the dressing into strips does not lead to lateral fraying due to the cutting of the mesh as is the case with known knitted fabrics and in which the further use leads to complication. The present wound dressing comprises a knitted fabric formed with a basic stitch construction and with a plurality of inlay threads having a Z or S twist, the yarns of the inlay threads having the same thickness and twist, and being inserted as slightly or greatly displaced wefts.
    Type: Grant
    Filed: May 26, 1983
    Date of Patent: October 16, 1984
    Assignee: Karl Otto Braun KG
    Inventors: Ewald Schafer, Harald Jung
  • Patent number: 4424808
    Abstract: The invention relates to a fabric which is highly longitudinally elastic in the warp direction and easily tearable in the weft direction, or highly longitudinally elastic in the weft direction and easily tearable in the warp direction, or highly longitudinally elastic and easily tearable in both the warp and weft directions, which is adhesively or self-adhesively coatable and has a crepe structure, whereby in bandage form it can be used as a fixing and compression bandage after distortions, luxations, fractures and similar injuries, as well as preventatively against injuries liable to occur when playing sports.
    Type: Grant
    Filed: April 30, 1980
    Date of Patent: January 10, 1984
    Assignee: Karl Otto Braun KG
    Inventors: Ewald Schafer, Harald Jung
  • Patent number: 4391106
    Abstract: The invention relates to a wound dressing which prevents or at least reduces sticking of the dressing to the surface of the wound due to contact with moisture from the wound and which without the use of over twisted threads has a controllable lifting action and an excellent secretion-absorbing action, whereby cutting of the dressing into strips does not lead to lateral fraying due to the cutting of the mesh as is the case with known knitted fabrics and in which the further use leads to complication. The present wound dressing comprises a knitted fabric formed with a basic stitch construction and with a plurality of inlay threads having a Z or S twist, the yarns of the inlay threads having the same thickness and twist, and being inserted as slightly or greatly displaced wefts.
    Type: Grant
    Filed: April 21, 1980
    Date of Patent: July 5, 1983
    Assignee: Karl Otto Braun K.G.
    Inventors: Ewald Schafer, Harald Jung
  • Patent number: 4236550
    Abstract: The invention relates to an elastic muslin bandage with in part elastic and non-elastic threads and with non-elastic weft threads which can be used elastically and as a fixing dressing having a high elastic behavior, permits an easy application to conical extremities and joints, is conductive to moisture and heat so that no moisture and heat chambers form, and in which slipping of the individual bandage layers is prevented, whereby the bandage is constructed in such a way that in the warp the web has textured polyfilic polyamide threads of thickness Td 70/13/2 or a lighter or heavier titre varying therefrom as the elastic element and threads of 17 tex staple fibre and/or bleached cotton of size Nm 60 or the like as the rigid element in a ratio 1:1, 1:2, 1:3, 2:1, 2:2, 2:3, 2:4 or the like, and in the case of a ratio of 1:1 in a number of 59 textured polyfilic polyamide fibres and 58 staple fibres based on the web width of 10 cm, and in the weft threads of 17 tex bleached cotton and/or staple fibre or a blende
    Type: Grant
    Filed: February 1, 1978
    Date of Patent: December 2, 1980
    Assignee: Karl Otto Braun KG
    Inventors: Franz Braun, Ewald Schafer