Patents Assigned to Pavena AG
  • Patent number: 4026484
    Abstract: Apparatus for controlling the winding of a continuously supplied fiber sliver on a bobbin which comprises a winding device for winding the continuously supplied fiber sliver from a supplying device on the bobbin arranged on said winding device and means for interrupting the winding phase of the winding device by a standstill phase during a bobbin change. A storage device is provided having a guiding means for building-up a fiber sliver reserve, and said guiding means being arranged at least translatorily movably over a distance for building-up the fiber sliver reserve during the standstill phase and for reducing the fiber sliver reserve during the winding phase. The guiding means is operatively connected with means for moving the guiding means to build-up the fiber sliver reserve and for tensioning the fiber sliver during the winding and the standstill phase.
    Type: Grant
    Filed: February 3, 1975
    Date of Patent: May 31, 1977
    Assignee: Pavena AG
    Inventor: Werner Naegeli
  • Patent number: 4025302
    Abstract: A method of producing a dyed and stabilized fiber sliver and sliver produced thereby wherein a non-twisted fiber arrangement is impregnated with a liquid for bonding the fibers, the liquid containing a dyestuff, and by application of pressure excessive or excess liquid is squeezed-off the fiber arrangement and the fibers are condensed or compacted at all sides into a compact sliver, and the individual fibers of the compact sliver at an increased or elevated temperature are mutually bonded and dyed, and the sliver is dryed. According to the invention the fiber arrangement is impregnated with a latent chemical compound activating the fiber material at the increased or elevated temperature, and the fibers after compacting into the compact sliver are dyed at the activating temperature and simultaneously are bonded mutually by the fiber material and the activating chemical compound is eliminated and the non-twisted sliver is dried.
    Type: Grant
    Filed: September 3, 1974
    Date of Patent: May 24, 1977
    Assignee: Pavena AG
    Inventors: Werner Naegeli, Antonius Schneider
  • Patent number: 4010056
    Abstract: A process for continuously bonding staple fibers into an essentially non-twisted yarn comprising the steps of introducing into a fiber arrangement composed of staple fibers an excess of a liquid containing an adhesive in distributed form, squeezing excess liquid out of the fiber arrangement, compacting the fiber arrangement by applying pressure to form a moist slubbing, and for setting the adhesive and transforming the slubbing into a bonded yarn bringing into contact as by feeding the slubbing into a condensing vapor atmosphere.The yarn produced according to the aforementioned process, compared to a yarn set in dry air with the same quantity of adhesive, possesses a higher breaking length and rupture or break elongation and a smoother surface.
    Type: Grant
    Filed: June 19, 1972
    Date of Patent: March 1, 1977
    Assignee: Pavena AG
    Inventor: Werner Naegeli
  • Patent number: 4010295
    Abstract: A process for continuously bonding hydrophilic staple fibers into a stable band wherein an excess amount of liquid containing an adhesive distributed therein is applied to a fiber arrangement formed of staple fibers, excess liquid is squeezed off, the fiber arrangement is compacted into a compact band by pressure, and the adhesive in the band is set by feeding the band into or bringing such into contact with a condensing vapor atmosphere.The stable band produced according to the aforementioned process is manifested by the features that such stable band, compared to a stable band having the same quantity of adhesive and set in dry air, possesses a greater breaking length and a better distribution of adhesive over the cross-section of the stable band.
    Type: Grant
    Filed: June 20, 1972
    Date of Patent: March 1, 1977
    Assignee: Pavena AG
    Inventor: Werner Naegeli
  • Patent number: 3941905
    Abstract: A method of continuously introducing an impregnating liquid into a textile fiber arrangement, wherein the fiber arrangement is passed through a converging space formed by circumferential surfaces of a pair of discs and by lateral limiting walls for transforming the fiber arrangement into a fiber sliver, the liquid is supplied under pressure to the face sides of the discs, and a liquid film is formed on the face sides of the discs for supporting the discs by said liquid film. Further, the liquid is transported along the face sides of said discs to the circumferential surfaces into the converging space by rotating the discs, there is formed a coat of liquid surrounding the fiber arrangement passing through said converging space, and subsequently condensing the fiber sliver into a compact fiber sliver in an adjacent hydrodynamic pressure zone acting at all sides and pressing liquid into the fiber sliver in said pressure zone by passing the fiber sliver between the circumferential surfaces of the discs.
    Type: Grant
    Filed: April 2, 1973
    Date of Patent: March 2, 1976
    Assignee: Pavena AG
    Inventor: Werner Naegeli