Tuck-in needle for a selvage forming device
AssigneeSulzer Brothers Limited
InventorsHans Zollinger, Mario Tamaro
Life of this patent
Estimating the term…
Abstract
The tuck-in needle of a mechanical selvedge-forming device has a catcher for a yarn end following a needle tip. The catcher is subdivided into an entry zone and a trough screened from the entry zone by a hook disposed towards the trough. In its catching movement the needle is moved only towards the weft yarn so that the yarn moves into the entry zone of the catcher. The weft yarn then slides inclinedly over the outside of the hook until passing by way of the hook tip into the catcher interior. The weft yarn can be drawn into the cloth selvedge in this position. This construction enables the tucking-in to be very simple.
Claims14
A tuck-in needle for a selvage forming device of a loom comprising
- a tip on one flank of said needle for passing into a space between two adjacent warp yarns;
- and
- a catcher for a weft yarn upstream of said tip, said catcher including an entry zone for initially receiving a weft yarn, a trough for receiving the weft yarn from said entry zone and a hook extending towards said trough to screen said trough from said entry zone.
A selvage forming device for a loom comprising
- a shaft;
- and
- a bent needle arm extending from said shaft for moving into a shed of warp yarns, said arm having a tip for passing into a space between two adjacent warp yarns during rotation of said shaft and a catcher upstream of said tip, said catcher including an entry zone for initially receiving a weft yarn, a trough for receiving the weft yarn from said entry zone and a hook extending towards said trough to screen said trough from said entry zone.
In combination
- a loom having means for forming a plurality of warp yarns into a shed, means for picking a weft yarn through said shed and a cloth beam for drawing off cloth;
- and
- a selvage forming device on at least one side of said loom, said device having a rotatably mounted shaft and a bent needle arm extending from said shaft for moving into said shed during rotation of said shaft, said arm having a tip for passing into a space between two adjacent warp yarns during rotation of said shaft and a catcher upstream of said tip, said catcher including an entry zone for initially receiving a weft yarn, a trough for receiving the weft yarn from said entry zone and a hook extending towards said trough to screen said trough from said entry zone.
A tuck-in needle for a selvage forming device of a loom comprising
- an inclined ramp for passing under and lifting an end of a weft yarn extending from a shed;
- a setback downstream of said ramp for receiving the weft yarn from said ramp during a forward motion of said ramp;
- and
- a trough for catching and receiving the weft yarn from said setback during a rearward motion of said ramp.
Dependencies are inferred from the claim text.