US 4,688,606 AGranted

Improper weft removing device for shuttleless looms

AssigneeTsudakoma Corp.

InventorYasuyuki Tamatani

Life of this patent

Estimating the term…

Loading patent…

Abstract

An improperly inserted weft removing device for a shuttleless loom which weaves a fabric by picking a weft measured and stored on a measuring and storing device into a shed of warps by the agency of a jet of a fluid jetted through a picking nozzle, said weft removing device including a winding unit for extracting an improperly inserted weft from the cloth fell of the cloth being woven on the shuttleless loom upon the occurence of a mispick; a guide nozzle for deflecting the weft from the picking path and guiding the same to a predetermined position in the winding unit, which is disposed between the picking nozzle and the edge of the cloth on the picking side; a cutter for cutting the weft extending between the picking nozzle and the winding unit; and a controller for controlling the winding unit, the guide nozzle and the cutter for a series of sequential weft removing actions.

Claims26

Dependent claims

A weft removing device for a shuttleless loom which weaves a fabric by inserting a weft measured and stored on a measuring and storing device into a shed of warps by the agency of a fluid jetted through a picking nozzle, comprising:

winding means for extracting an improperly picked weft from the fell of the fabric being woven in response to the occurrence of a mispick;
guide nozzle means for deflecting the weft from a picking path and guiding it to a predetermined location in said winding means, said guide nozzle means being disposed between said picking nozzle and an edge of the fabric nearest said picking nozzle;
cutter means for cutting the weft at a location between the picking nozzle and the winding unit;
and controller means for selectively actuating said winding means, said guide nozzle means and said cutter means in a predetermined sequence;
wherein said winding means includes:
a housing;
a rotary member rotatably supported within said housing and having an ejecting passage which is formed through a central portion thereof, which extends along an axis of rotation thereof, and through which an extracted weft can be ejected;
rotative driving means for driving said rotary member for rotation;
a winding member supported within said housing coaxially with said rotary member and so as to be rotatable, supported for axial movement relative to said rotary member between positions in contact with and separated from said rotary member, and provided with nozzle means formed in a central portion thereof for blowing compressed air into said ejecting passage of said rotary member;
axial driving means responsive to said controller means for axially shifting said winding member relative to said rotary member so as to bring said winding member into said position in contact with said rotary member and so as to move said winding member to said position separated from said rotary member;
and
detecting means for detecting the existence of a weft in a weft removing passage within said housing, said detecting means being operatively coupled to said controller means.

9 more elements

An apparatus for removing an improperly inserted weft thread from a warp shed of a fabric being woven by a loom which inserts weft threads into the warp shed using jets of fluid emitted by a picking nozzle, comprising:

detection means for detecting a weft thread which has been improperly inserted into the warp shed;
a winding device having first and second members which each have a winding surface thereon, and having means supporting said first and second members for rotation about a common axis and for relative axial movement between a spaced position and an engaging position in which said winding surfaces are respectively spaced from and engaging each other, said first member having a passage which extends axially thereinto coaxial with said common axis and in a direction away from said second member, and said second member having a nozzle hole therein which opens toward and is aligned with said passage in said first member, said winding device further including rotational drive means for effecting rotation of one of said first and second members, axial drive means for effecting relative axial movement of said first and second members, and fluid jet means for causing a jet of fluid to be ejected from said nozzle hole in said second member in an axial direction toward said passage through said first member;
guide means for moving a portion of an improperly inserted weft thread to a location between said first and second members when said first and second members are in said spaced position;
and
control means operatively coupled to said winding device and said guide means and responsive to detection of an improperly inserted weft thread by said detection means for causing said guide means to move a portion of the improperly inserted weft thread to said location between said first and second members, for thereafter causing said axial drive means to effect movement of said first and second members to their engaging position so that the portion of the weft thread is clamped therebetween, for causing said rotational drive means to effect rotation of said one of said first and second members so that the weft thread is wound up onto said first and second members, and for thereafter causing said axial drive means to effect movement of said first and second members away from their engaging position and said fluid jet means to eject a jet of fluid through said nozzle hole in said second member so that the weft thread wound up by said first and second members is blown into said passage in said first member.

2 more elements

Dependencies are inferred from the claim text.