Abstract: A device for dividing a card web comprised of a loose structure of fibers into successive longitudinal sections, comprises an air-permeable conveyor belt having a conveyor strand carrying the card web on one side thereof for conveying the card web in a conveying direction, a suction box arranged on a side of the conveyor strand opposite the one side, the suction box defining a suction slot extending transversely to the conveyor strand and facing the opposite side of the conveyor strand, and a screen arranged to close the suction slot and to open it periodically whereby suction is applied to the card web through the air-permeable conveyor belt and a respective one of the longitudinal sections is separated from the card web by sucking the fibers in alignment with the suction slot out of the card web.
Abstract: A sliver dividing device in a textile machine for a sliver travelling in a given direction comprises a sliver divider for dividing the sliver into at least two strands to be delivered to a work station for further processing. The sliver divider is movable in a direction substantially perpendicular to the given direction. In a preferred embodiment, the device includes guide walls for guiding the sliver with the sliver divider being disposed between the guide walls. In another preferred embodiment, the sliver divider is further rotateable about a pivot shaft and the guide walls are moveable and/or rotatable.
Type:
Grant
Filed:
October 5, 1990
Date of Patent:
February 4, 1992
Assignee:
W. Schlafhorst AG & Co
Inventors:
Karl-Josef Brockmanns, Siegfried Bruns, Theo Lembeck
Abstract: An improved method for the after-treatment of washed and dried fibre cable having a minimum mass of 250 ktex by crimping, fixing, cooling and optionally cutting or tearing is achieved in that the band width of the cable issuing from the drier with a covering density of at most 5 ktex/cm is reduced by at least 50% of the original band width with a corresponding increase in the packing density, is crimped in a stuffer box crimping means at a stuffer box pressure of from 4 to 10 N/cm and a stuffer box temperature of from 80.degree. to 95.degree. C., the crimping is fixed in or immediately after the stuffer box, the cable is deposited on the surface of an air-permeable conveyor belt, air is blown or sucked there through fibre package or conveyor belt and the cable is then optionally supplied to a tearing converter or a cutting machine.
Type:
Grant
Filed:
April 3, 1986
Date of Patent:
October 27, 1987
Assignee:
Bayer Aktiengesellschaft
Inventors:
Wolfgang Backer, Wolfram Wagner, Gunther Hahn, Ralf Miessen
Abstract: A cylindrical condenser screen is mounted to rotate adjacent a fiber supply, and around a pair of vacuum plenums, one of which has a generally rectangularly shaped slot extending axially of the screen adjacent its inside surface. A low suction in said slot draws fibers from the supply and onto the screen in the form of a nonwoven web. A cover that overlies the screen and the low suction slot has thereon at least one tapered projection, which extends in the direction of the travel of the web and over at least one high suction slot formed in the other plenum. Atmospheric air, which is drawn into the high suction slot along the tapered side edges of the cover projection, causes the fibers in the web to be rolled or shifted inwardly beneath the projection, thereby to form the web into one or more slivers which are drawn from beneath the discharge end of the projection by conventional takeoff rolls.
Abstract: A process of producing slivers for open-end spinning of wool or synthetic yarn and being characterized by eliminating the necessity for repeated doublings and draftings of the sliver while providing the desired uniform fiber distribution and weight in the sliver and yarn. Stock material is carded, then cross-lapped to reorient the fiber distribution, and again carded for producing a fiber web. This web is divided into relatively narrow rovings or strips of fibers and oriented into groups containing alternate strips of fibers from across the width of the fiber web. The respective strips of fibers from each such group are combined and formed into a sliver.