Double-belt draw frame
OwnerPeter Artzt, Martin Conzelmanninventors
Life of this patent
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Abstract
A process and device for bundling a fiber composite which has been drafted in a drafting device having a pair of output rollers and a pair of delivery rollers gathers together the fiber composite leaving the pair of output rollers in a fiber bundling zone. The fiber composite is conveyed through the fiber bundling zone and supported through the fiber bundling zone on one side by a conveying plane which moves in the direction of conveyance of the fiber composite. A suction air stream is drawn through the fiber bundling zone at substantially a right angle to the conveying direction of the fiber composite. The suction air stream causes the gathering together of the fiber composite in the bundling zone at a width substantially equal to a desired width of the fiber composite.
Claims24
A process for bundling a fiber composite which has been drafted in a drafting device having a pair of output rollers and a pair of delivery rollers, said process comprising gathering together the fiber composite leaving the pair of output rollers of the drafting device in a fiber bundling zone;
- conveying the fiber composite through the fiber bundling zone and supporting the fiber composite through the fiber bundling zone on one side by a substantially flat conveying belt which moves in the direction of conveyance of the fiber composite between the output rollers and the delivery rollers;
- drawing a suction air stream through the conveying belt over at least a portion of the fiber bundling zone, the suction air stream drawing the fiber composite against the conveying belt over the width of the suction air stream defined through the belt causing the gathering together of the fiber composite;
- and drawing the suction air stream through the conveying belt to act on the fiber composite supported thereby at a width substantially equal to a desired width of the bundled fiber composite.
A drafting device having a main drafting zone with a pair of output rollers and a pair of delivery rollers, said drafting device further comprising:
- a fiber bundling zone defined between said output rollers and said delivery rollers;
- a pneumatic condensation apparatus provided within said fiber bundling zone, said condensation apparatus comprising a conveying plane for a fiber composite leaving said output rollers, said conveying plane further defined by a perforated belt;
- and
- said condensation apparatus further comprising a suction device extending along one side of said perforated belt opposite said fiber composite, said suction device configured to draw a suction air stream through said perforated belt and said fiber composite for bundling together said fiber composite.
Dependencies are inferred from the claim text.