Textiles: weaving – Weft manipulation – Weaving with stationary weft supply
Reexamination Certificate
2000-04-03
2001-05-08
Falik, Andy (Department: 3741)
Textiles: weaving
Weft manipulation
Weaving with stationary weft supply
Reexamination Certificate
active
06227259
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a feed gripper for a gripper loom and comprising a one piece tubular metal housing carrying at least a thread clamp.
BACKGROUND OF THE INVENTION
In gripper looms, a feed gripper accepts a filling yarn kept ready at one side of a shed and then inserts it into this shed. In accordance with one example, the feed gripper moves the filling approximately into the shed center. There the filling is transferred to a receiving gripper and moved to the opposite shed side. In another example, the feed gripper moves the filling to the opposite shed side where it is transferred to a stationary gripper. The feed gripper is mounted to the front end of a rapier which can be inserted into and then be withdrawn from the shed and which drives the feed gripper and moves it into the shed.
A feed gripper of the above kind is known from the British patent 1,487,897. Two bent and mutually articulating metal plates constitute a tubular housing. The feed gripper is fitted at one or both sides with two cooperating clamp elements for each filling. These clamp elements each are mounted on one of the two mutually connected metal plates.
In another example of a known gripper loom as disclosed in the French patent 2,132,560, a gripper head mounted on a gripper rod is described, and which comprises a tubular housing constituted of an integral plate. This gripper head contains no thread clamp and pulls a looped thread into a shed, one end of said loop being held in place. At the center of the shed, the loop is transferred to another gripper which then pulls the free filling end through the shed.
BRIEF SUMMARY OF THE INVENTION
The objective of the invention is to improve a feed gripper for a gripper loom. This objective is achieved by forming the housing of a metal plate and of at least two mutually overlapping segments rigidly joined to each other.
This design thus creates a closed and hollow structure offering a comparatively high dimensional stability even if a relatively thin metal plate is used.
In a further embodiment of the invention, the mutually overlapping segments provide supports for one or more components. Because in this region of overlap the gripper housing wall thickness is doubled, the component(s) is (are) reliably held in place even in the presence of applied forces.
In another embodiment of the invention, the supported component is affixed by least one screw passing through the overlapping segments and connecting hem to each other and to the component. The resultant design is very simple because assembly of the component simultaneously firmly joins the overlapping segments of the housing firmly to each other.
REFERENCES:
patent: 3931837 (1976-01-01), Volpe
patent: 3934621 (1976-01-01), Tosches
patent: 4259997 (1981-04-01), Tosches
patent: 4587998 (1986-05-01), Egloff et al.
Bacon & Thomas PLLC
Falik Andy
Picanol N.V.
LandOfFree
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