US 5,086,542 AGranted

Electronic stop motion for textile draw frame

OwnerJames R. Franklin, Larry R. Wrightinventors

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Abstract

An apparatus for sensing a parting in any of the strands of sliver fed from a creel to the drafting rolls of a high speed textile draw frame to stop the drawing process in response to a sliver parting. A plurality of sliver guides are mounted on an elongate arm which is compact and readily mounted on the creel. The sliver guides are U-shaped with inturned upper end portions defining a restricted opening at the top portion and a capacitive sensing switch positioned in the bight portion thereof. The sliver guides also include a low coefficient of friction coating to reduce the accumulation of lint. Cylindrical post separators are positioned alongside the path of the slivers to maintain separation and prevent entangling of adjacent slivers. Logic and control electronics are contained within a housing carried by the elongate arm.

Claims13

Dependent claims

In combination with a creel and a draw frame, the draw frame having a power supply and a plurality of drafting rolls defining a drafting zone for drafting strands of textile sliver fed thereto from the creel, a stop motion for sensing a parting of the sliver prior to being fed into the drafting zone, said stop motion comprising:

at least one elongate arm mounted on the creel and upstream of the drafting zone;
a plurality of sliver guides supported by said arm in side-by-side relation thereon, said sliver guides having a low coefficient of friction to reduce accumulation of textile lint thereon, each of said sliver guides being substantially U-shaped in cross-section and having inturned upper end portions defining a restricted opining;
sliver sensing means carried by each of said U-shaped sliver guides and being positioned in a bight portion thereof and each having an exposed upper surface substantially flush with the surrounding bight portion of the sliver guide;
a series of sliver separator means supported by said elongate arm and positioned to separate strands of sliver passing through adjacent sliver guides, said separator means having a low coefficient of friction to reduce accumulation of textile lint thereon;
capacitive detecting means cooperating with said sliver sensing means for identifying the absence of any parted strand of sliver in said sliver guides and for also identifying an absence of movement of any strand of sliver in said sliver guides as when sliver is parted immediately upstream of the drafting zone;
and
control means responsive to said capacitive detecting means for interrupting the power supply and stopping the drafting rolls of the draw frame when the sliver is parted and responsive to means for visually identifying the particular sliver guide in the path of the parted sliver.

4 more elements

In combination with a creel and a dual delivery draw frame, the draw frame having a power supply and a plurality of drafting rolls defining a drafting zone for drafting strands of textile sliver fed thereto from the creel, a stop motion for sensing a parting of the sliver prior to being fed into the drafting zone, said stop motion comprising:

a pair of elongate arms mounted on the creel behind the drafting zone;
a plurality of sliver guides supported by each of said arms in side-by=side relation thereon, said sliver guides being grouped on each of said arms corresponding to a delivery of slivers, said sliver guides having a low coefficient of friction to reduce accumulation of textile lint thereon, each of said sliver guides being substantially U-shaped in cross-section and having inturned upper end portions defining a restricted opening;
sliver sensing means supported by each of said U-shaped sliver guides in each group and being positioned in a bight portion of the sliver guide and each having an exposed upper surface substantially flush with the surrounding bight portion of the sliver guide;
a series of sliver separator means carried by each of said elongate arms and positioned to separate strands of sliver passing through adjacent sliver guides, said separator means having a low coefficient of friction to reduce accumulation of textile lint thereon;
capacitive detecting means cooperating with said sliver sensing means for identifying an absence of any parted strand of sliver in said sliver guide and for also identifying the absence of movement of any strand of sliver in said sliver guides as when sliver is parted immediately upstream of the drafting zone;
control means responsive to said capacitive detecting means for interrupting the power supply and stopping the drafting rolls of the draw frame when the sliver is parted and responsive to means for visually identifying the particular sliver guide in the path of the parted sliver;
and
a rectangularly shaped housing carried by at least one of said elongate arms, said capacitive detecting means and said control means contained within said housing.

5 more elements

Dependencies are inferred from the claim text.