Tubular fabric weaving machine with turnover fold control
AssigneeTexo AB
InventorBo Lindblom
Life of this patent
Estimating the term…
Abstract
A weaving machine arrangement incorporates a shaft frame machine and, arranged on both sides thereof, two Jacquard machines. The weaving machine arrangement is coordinated, and first warp threads for the woven material are obtained from the shaft frame weaving machine and second warp threads from the Jacquard machines. The second warp threads are used to form spread-out turnover fold areas in the tubular material. The Jacquard machines form patterns for the closing locations of the weft threads in the turnover fold areas. By using spread-out turnover fold areas and spreading the closing locations of the weft threads in these areas, high-strength piecing functions are obtained in the tubular weave.
Claims22
Weaving machine apparatus for producing a tubular product including a top ply and a bottom ply and turnover fold areas in which warp and weft threads can be guided through sheds formed with the warp threads, the apparatus comprising:
- a shaft frame weaving machine supplying a first lease function involving a first warp thread assembly and first warp threads;
- at least one additional machine supplying a second lease function, coordinated with the first lease function, involving a second warp thread assembly, the at least one additional machine producing the turnover fold area spread in a longitudinal direction of the weft threads for cut-off weft threads;
- cutting members, for cutting ends of the weft threads, arranged on a side of the at least one additional machine;
- thread-end-controlling members arranged in the turnover fold area for guiding the cut weft thread ends to a position between two warp thread pairs which form a part of the second warp thread assembly, the warp thread pairs being chosen by a pattern controller of said additional machine to form a pattern of mutually displaced locations for exit positions in a spread direction of the turnover fold area.
A method of forming a tubular product including top and bottom plies formed from warp and weft threads, the method comprising:
- piecing together the top and bottom plies with a turnover fold area, the turnover fold area being arranged in a longitudinal direction of the weft threads;
- and
- guiding a weft thread end with thread-end-controlling members from the bottom or top ply around an outer warp thread into a lease for the top and bottom ply, respectively, to an exit position between warp thread pairs in the turnover fold area.
Method for forming a tubular weave with a weaving machine arrangement, the tubular weave including top and bottom weave materials connected by turnover fold, the weave materials being woven by the weaving machine arrangement with first warp threads and weft threads, a weft thread being activated in a transverse direction of the warp threads through a shed and being cut off at its ends, the method comprising:
- providing second warp threads, in connection with the first warp threads, with at least one additional machine;
- actuating the second warp threads individually and separately in relation to the first warp threads with means for controlling the at least one additional machine;
- forming at least one turnover fold area, which extends from an edge of the turnover fold area, from the second warp threads, the turnover fold extending in a direction of the weft threads;
- and
- arranging closing locations of the cut off ends in the turnover fold area to have spread positions.
A weaving machine arrangement comprising:
- a shaft frame weaving machine for weaving, with first warp threads, top and bottom weave materials which are joined by turnover fold areas, wherein weft threads are actuated in a direction transverse to the first warp threads through a shed formed by the first warp threads;
- cutting members for cutting the weft threads at their ends;
- at least one additional machine arranged beside the shaft frame weaving machine and providing second warp threads arranged outside the first warp threads, the at least one additional machine acts separately and individually upon the second warp threads in relation to the first warp threads to form sheds with the second warp threads for the weft threads and wherein the second warp threads form part of a turnover fold area extending in a longitudinal direction of the weft threads;
- and
- controlling means for controlling the at least one additional machine to provide different closing locations in the turnover fold area for thread ends.
A tubular weave comprising:
- a top ply;
- a bottom ply connected to the top ply by turnover fold areas, the top and bottom plies being formed from warp and weft threads arranged substantially perpendicular to each other;
- exit positions for weft thread ends provided in the turnover fold area between pairs of warp threads, the exit positions being spread out in a longitudinal direction of the weft threads;
- and
- a first weft thread end of a first weft thread in the top or bottom ply and a second weft thread end of a second weft thread in the bottom or top ply, respectively, have a common exit position in the turnover fold area.
In a shaft frame weaving machine in which top and bottom weave materials are formed using first warps threads and in which weft threads are drawn through sheds formed from the first warp threads, the improvement comprising:
- a Jacquard machine supplying second warp threads located outside the first warp threads and comprising a lease supplementing a first lease of the shaft frame weaving machine to form a turn over fold area connecting the top and bottom weave materials and extending in a direction of the weft threads, the Jacquard machine also forming a pattern of closing location for ends of the weft threads;
- and
- a means for guiding the ends of the weft threads of the top or bottom weave material around an outer warp thread into the lease for the bottom or top weave material, respectively, and into closing positions in the bottom of the top weave material, respectively.
Dependencies are inferred from the claim text.