Drafting frame for a spinning machine
AssigneeZinser Textilmaschinen GmbH
InventorsFriedrich Dinkelmann, Andreas Olbrich, Peter Artzt, Gunter Steinbach
Life of this patent
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Abstract
A sliver compactor is provided between a drafting roller of a drafting frame and the delivery unit which supplies the sliver to the spinning stations of the spinning machine. The sliver compactor has a shielding element juxtaposed with the perforated moving surface to which suction is applied and which reduces the suction force required to draw the fibers of the sliver into a compact form. The shielding element extends over a plurality of slivers and the respective spinning stations and a number of such shielding elements may be aligned over the length of the machine below the stretching field plane and secured on the machine frame.
Claims12
A drafting frame for a spinning machine comprising:
- a drafting zone comprising a roller support, and a plurality of roller pairs successively traversed by respective slivers for delivery to respective spinning stations whereby each sliver is drafted in a drafting field plane between successive roller pairs, said drafting zone having at least one output roller;
- a feed unit on said support spaced from the output roller and supplying each sliver to the respective spinning station;
- a transporter between said output roller and said feed unit and formed with a moving transport surface having at least one perforation assigned to each sliver and traveling across a suction opening applying suction to the respective sliver to compact the sliver;
- and
- an elongated shielding element juxtaposed with said surface over an effective region of said suction opening and extending longitudinally over a plurality of spinning stations while being affixed to said support below the drafting field plane.
A drafting frame for a spinning machine comprising:
- a drafting zone comprising a roller support, and a plurality of roller pairs successively traversed by respective slivers for delivery to respective spinning stations whereby each sliver is drafted in a drafting field plane between successive roller pairs, said drafting zone having at least one output roller;
- a feed unit on said support spaced from the output roller and supplying each sliver to the respective spinning station;
- a suction unit forming a sliver compactor between said output roller and said feed unit and comprising a moving transport surface having at least one perforation assigned to each sliver and traveling across a suction opening applying suction to the respective sliver to compact the sliver;
- and
- a large-area shielding element juxtaposed with said surface and affixed directly to said suction unit.
A drafting frame for a spinning machine comprising:
- a drafting zone comprising a roller support, and a plurality of roller pairs successively traversed by respective slivers for delivery to respective spinning stations whereby each sliver is drafted in a drafting field plane between successive roller pairs, said drafting zone having at least one output roller;
- a feed unit on said support spaced from the output roller and supplying each sliver to the respective spinning station;
- a suction unit forming a sliver compactor between said output roller and said feed unit and comprising a moving transport surface having at least one perforation assigned to each sliver and traveling across a suction opening applying suction to the respective sliver to compact the sliver;
- and
- a shielding element juxtaposed with said surface and defining with said surface in said suction unit a space openable toward the exterior and into which said sliver is insertable, said perforation being formed by a row of orifices in said moving transport surface riding across a shoe having said suction opening formed therein, said shielding element being integral with said shoe at one end and being formed with a resilient flange at an opposite end, said flange being deflectable by said sliver to open said space and engageable with a portion of said shoe to close said space.
Dependencies are inferred from the claim text.