Warp shedding apparatus of loom
US-2017247819-A1 · Aug 31, 2017 · US
Warp shedding apparatus of loom
US10287713B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10287713-B2 |
| Application number | US-201715441740-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 24, 2017 |
| Priority date | Feb 25, 2016 |
| Publication date | May 14, 2019 |
| Grant date | May 14, 2019 |
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Abstract
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A warp shedding apparatus of a loom includes a plurality healds arranged in a weaving width direction of the loom. Each heald has a thread eyelet through which a ground warp yarn is passed and held. The healds are raised and lowered to form a shed. A difference in tension between raised ground warp yarns and lowered ground warp yarns held by the healds located in opposite end portions in the weaving width direction is greater than a difference in tension between raised ground warp yarns and lowered ground warp yarns held by the healds located in a central portion in the weaving width direction.
First claim
Opening claim text (preview).
What is claimed is: 1. A warp shedding apparatus of a loom comprising: a plurality of healds arranged in a weaving width direction of the loom, each heald having a thread eyelet through which a ground warp yarn is passed and held, wherein the healds are raised and lowered alternately to form a shed, and a difference in tension between raised ground warp yarns and lowered ground warp yarns held by the healds that are located in opposite end portions in the weaving width direction is greater than a difference in tension between raised ground warp yarns and lowered ground warp yarns held by the healds that are located in a central portion in the weaving width direction. 2. The warp yarn shedding apparatus of the loom according to claim 1 , wherein one of a shed opening amount of the raised ground warp yarns held by the healds located in the opposite end portions in the weaving width direction and a shed opening amount of the lowered ground warp yarns held by the healds located in the opposite end portions in the weaving width direction is greater than the other. 3. The warp yarn shedding apparatus of the loom according to claim 2 , wherein one of a shed opening amount of the raised ground warp yarns held by the healds located in the opposite end portions in the weaving width direction and a shed opening amount of the lowered ground warp yarns held by the healds located in the opposite end portions in the weaving width direction is greater than shed opening amounts of the raised ground warp yarns and the lowered ground warp yarns held by the healds located in the central portion in the weaving width direction. 4. The warp shedding apparatus of the loom according to claim 1 , wherein the thread eyelets of the healds in the opposite end portions in the weaving width direction are located higher or lower than the thread eyelets of the healds located in the central portion in the weaving width direction. 5. The warp shedding apparatus of the loom according to claim 1 , wherein the warp shedding apparatus comprises a plurality of heald frames to which the healds are mounted, a plurality of drive mechanisms each including a drive motor connected to corresponding one of the heald frames, each drive mechanism is configured such that the drive motor drives the heald frame independently from the other heald frames to form a shed, and at least one of the heald frames holds by the healds the ground warp yarns only in the opposite end portions in the weaving width direction.
Assignees
Inventors
Classifications
- D03C3/20Primary
Electrically-operated jacquards · CPC title
Selvedge shedding mechanisms not forming part of main shedding mechanism (selvedge jacquards D03C3/18; leno selvedge mechanism D03C7/00) · CPC title
- D03C9/00Primary
Healds; Heald frames (for leno shedding D03C7/00) · CPC title
- D03C13/00Primary
Shedding mechanisms not otherwise provided for · CPC title
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- What does patent US10287713B2 cover?
- A warp shedding apparatus of a loom includes a plurality healds arranged in a weaving width direction of the loom. Each heald has a thread eyelet through which a ground warp yarn is passed and held. The healds are raised and lowered to form a shed. A difference in tension between raised ground warp yarns and lowered ground warp yarns held by the healds located in opposite end portions in the we…
- Who is the assignee on this patent?
- Toyota Jidoshokki Kk
- What technology area does this patent fall under?
- Primary CPC classification D03C3/20. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue May 14 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).