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US 6,112,509 AGranted
Drafting equipment with small double belts
AssigneeInv-Institut fur Textil-und Verfahrenstechnik
InventorsPeter Artzt, Holger Zoudlik
Life of this patent
Estimating the term…
Abstract
A drafting equipment is provided with a small double belt for spinning machines with a fiber bundling zone which follows the pair of output rollers of the main drafting field and is followed by a pair of delivery rollers. A pneumatic compression device is provided between the pair of output rollers and the pair of delivery rollers. A pneumatic compression device is provided with a small perforated belt and a suction device extending on the side of the belt away from the fiber sliver and which sucks air through the fiber sliver between the pair of output rollers and the pair of delivery rollers.
Claims23
A device for spinning machines for bundling together a fiber sliver, said device comprising:
- a pair of output rollers and a pair of delivery rollers defining a fiber bundling zone therebetween wherein said fiber sliver is bundled together in its travel from said output rollers to said delivery rollers;
- a compression device operably disposed in said fiber bundling zone, said compression device further comprising a belt cage disposed between said output and delivery rollers and a perforated belt disposed in a running path around one of said delivery rollers and said belt cage and along which the fiber sliver is conveyed;
- and
- a suction device disposed on a side of said perforated belt away from said fiber sliver, said suction device defining a suction zone along said running path of said perforated belt that is less than about one-half of the length of said fiber bundling zone between said output and delivery rollers;
- and
- wherein said suction device comprises a groove disposed within said belt cage and connected to a suction channel, said groove defining said suction zone and extending longitudinally about half way along said belt cage.
3 more elements
A device for spinning machines for drafting and bundling together a fiber sliver, said device comprising:
- a pair of output rollers and a pair of delivery rollers defining a fiber bundling zone therebetween wherein said fiber sliver is bundled together in its travel from said output rollers to said delivery rollers;
- a compression device operably disposed in said fiber bundling zone, said compression device further comprising a perforated belt defining a running path between said output rollers and said delivery rollers;
- a suction device disposed on a side of said perforated belt away from said fiber sliver, said suction device defining a suction zone in said fiber bundling zone along said running path;
- and
- said perforated belt comprising a plurality of perforations defined therethrough that are connected by at least one groove disposed lengthwise along said perforated belt in the direction of fiber sliver movement.
2 more elements
A device for spinning machines for bundling together a fiber sliver, said device comprising:
- a pair of output rollers and a pair of delivery rollers defining a fiber bundling zone therebetween wherein said fiber sliver is bundled together in its travel from said output rollers to said delivery rollers;
- a compression device operably disposed in said fiber bundling zone, said compression device further comprising a perforated belt disposed in a running path between said output and delivery rollers;
- a suction device disposed on a side of said perforated belt away from said fiber sliver;
- and
- a belt cage around which said perforated belt is at least partially disposed, said suction device comprising a groove disposed within said belt cage and connected to a suction channel, said groove defining said suction zone, and further comprising a blowing air channel disposed within said belt cage so as to direct pressurized cleaning air into said groove generally across from said suction channel.
2 more elements
A device for spinning machines for bundling together a fiber sliver, said device comprising:
- a pair of output rollers and a pair of delivery rollers defining a fiber bundling zone therebetween wherein said fiber sliver is bundled together in its travel from said output rollers to said delivery rollers;
- a compression device operably disposed in said fiber bundling zone, said compression device further comprising a perforated belt disposed generally between said output and delivery rollers;
- a suction device disposed on a side of said perforated belt away from said fiber sliver;
- and
- a ridge disposed generally immediately following a nip of said delivery rollers in a direction of travel of the fiber sliver over which said perforated belt runs, said ridge causing a clearance space between said perforated belt and said delivery roller on the side of said perforated belt opposite from the fiber sliver.
2 more elements
A device for spinning machines for bundling together a fiber sliver, said device comprising:
- a pair of output rollers and a pair of delivery rollers defining a fiber bundling zone therebetween wherein said fiber sliver is bundled together in its travel from said output rollers to said delivery rollers;
- a compression device operably disposed in said fiber bundling zone, said compression device further comprising a perforated belt disposed generally between said output and delivery rollers;
- a suction device disposed on a side of said perforated belt away from said fiber sliver;
- and
- a plurality of traversal holes interspaced between said perforations, said traversal holes extending in a direction transverse to the direction of fiber sliver movement greater than in the direction of fiber sliver movement.
2 more elements
A device for spinning machines for bundling together a fiber sliver, said device comprising:
- a pair of output rollers and a pair of delivery rollers defining a fiber bundling zone therebetween wherein said fiber sliver is bundled together in its travel from said output rollers to said delivery rollers;
- a compression device operably disposed in said fiber bundling zone, said compression device further comprising a perforated belt disposed generally between said output and delivery rollers;
- a suction device disposed on a side of said perforated belt away from said fiber sliver, said suction device defining a suction zone along said perforated belt that is less than the length of said perforated belt;
- a belt cage around which said perforated belt is at least partially disposed, said suction device comprising a groove disposed within said belt cage and connected to a suction channel, said groove defining said suction zone;
- an additional suction compression area downstream of said suction zone and before said delivery rollers;
- and
- wherein said additional suction compression area is defined by a suction channel in communication with said groove.
4 more elements
A device for spinning machines for bundling together a fiber sliver, said device comprising:
- a pair of output rollers and a pair of delivery rollers defining a fiber bundling zone therebetween wherein said fiber sliver is bundled together in its travel from said output rollers to said delivery rollers;
- a compression device operably disposed in said fiber bundling zone, said compression device further comprising a perforated belt disposed generally between said output and delivery rollers;
- a suction device disposed on a side of said perforated belt away from said fiber sliver, said suction device defining a suction zone along said perforated belt that is less than the length of said perforated belt;
- and
- a belt cage around which said perforated belt is at least partially disposed, said suction device comprising a groove disposed within said belt cage and connected to a suction channel, said groove defining said suction zone, and further comprising a blowing air channel disposed within said belt cage so as to direct pressurized cleaning air into said groove generally across from said suction channel.
2 more elements
Dependencies are inferred from the claim text.