US3602264A - Terry loom warp control means and method - Google Patents
Terry loom warp control means and method Download PDFInfo
- Publication number
- US3602264A US3602264A US861543A US3602264DA US3602264A US 3602264 A US3602264 A US 3602264A US 861543 A US861543 A US 861543A US 3602264D A US3602264D A US 3602264DA US 3602264 A US3602264 A US 3602264A
- Authority
- US
- United States
- Prior art keywords
- terry
- warp
- harness
- sheet
- warp yarns
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D27/00—Woven pile fabrics
- D03D27/02—Woven pile fabrics wherein the pile is formed by warp or weft
- D03D27/06—Warp pile fabrics
- D03D27/08—Terry fabrics
Definitions
- a terry warp yarn control means and method for shuttleless looms which during the weaving of terry fabric is effective-in maintaining the warp yarns of the upper terry warp sheet in alignment with a minimum amount of tension when lowered during shedding to cross with the lower terry warp sheet so as to prevent an interferene between the end of a cut length of filling being inserted into a shed and the yarns of said upper terry warp sheet.
- the invention relates to shuttleless looms for weaving terry fabric and more particularly to an improvement in the means and method of controlling the shedding of the warp yarns during each terry weaving cycle.
- Shuttleless looms to which the instant invention is applicable employ reciprocating carriers one of which projects a double length of filling approximately halfway through a shed formed by warp threads and the other of which receives that filling and draws the loose end thereof through the remainder of the shed.
- the carrier which introduces the filling yarn is known as the inserting carrier and the other which completes the laying of a pick as the receiving or extending carrier.
- a common terry weave is formed in three-pick cycles; however cycles having four or more picks are often used and either choice is suitable for weaving with the present invention.
- the three pick terry cycle is woven by placing a so-called loose pick into an open shed of ground warp yarns and then inserting a second loose pick in the same ground shed opening after crossing the warp threads of the upper and lower terry warp sheets.
- the final step in the three pick cycle is to cross both the upper and lower ground and terry warp sheets and insert a so-called fast pick of filling which is then beat-up along with the two loose picks into the fell of the fabric.
- the warp yarns of said upper terry warp sheet are lacking tension and become slack to the extent of creating an interference with the free end of filling yarn being extended through the shed by the extending carrier.
- the loose end in many instances, has a tendency to whip around in an uncontrollable manner and very often assumes a position or gets into a condition by which apart of the loose end wraps or entwines itself around one or more of the slack warp yarns of the upper terry warp sheet being drawn down to cross with the lower terry warp sheet.
- the terry loom warp control provides a means for maintaining the warp threads of the upper terry warp sheet in alignment and with a minimum amount of tension while being lowered to cross with the warp threads of the lower terry warp sheet.
- By holding these warp yarns in alignment during shedding the closeness of these warp yarns forms a shield which prevents the possibility of the crratic moving filling end to become entangled therewith.
- the terry loom warp control of the present invention includes in addition to the conventional number of harness members utilized for actuating the shedding function of the upper and lower ground and terry warp sheets, an additional harness member which is arranged and adapted to operate in cooperation with that conventional harness member for controlling the sheet of upper terry warp yarns.
- the additional harness member On the initial movement of the regular harness member to lower the upper terry warp sheet to cross with the lower terry warp sheet, the additional harness member is caused to move upwardly for a predetermined distance and then reverse its direction of movement and move downwardly with said regular harness member.
- This motion applies a minimum amount of tension to the warp yarns of the upper terry warp sheet and as they move downwardly to cross with the lower sheet they are held in alignment and the density thereof is such as to provide a shield which prevents the possibility of the end of filling yarn becoming entangled with these warp yarns.
- a more specific object of the invention is to provide a method and means for maintaining a minimum amount of tension on the warp yarns of the upper terry warp sheet and to hold them in alignment during their shedding function.
- FIG. 1 is a schematic sectional view through a shuttleless loom for weaving terry fabric showing the warp control device according to the invention applied thereto, and
- FIGS. 2, 3 and 4 are schematic sectional views of the harness members in FIG. 1 showing progressively the path of movement the harnesses follow during the shedding function of the upper terry warp sheet.
- FIG. 1 DESCRIPTION OF THE PREFERRED EMBODIMENT
- FIG. 1 there is shown a top or pile warp beam 10 from which pile warp yarns 11 are drawn and which in a known manner forms the pile loops in the terry fabric.
- This yarn as it leaves the warp beam 10 is guided about the outer periphery of a pair of juxtapositioned pile rolls l2 and 13 and the latter being driven by any suitable means serve to draw the required amount of yarn necessary to form the pile loops when woven with the ground warp yarns identified by numeral 14.
- the pile warp yarns after leaving the pile roll 13 make contact with a floating pile guide roll 15 and thence extend forwardly and through a conventional form of a loom warp stop motion generally indicated by numeral 16.
- the ground warp yarns 14 are drawn or let off from a warp beam 17 and extending in a generally upward direction are caused to pass about the upper surface of a drag roll 18. From the drag roll 18 the ground warp yarns extend forwardly to be acted upon by a whip roll 19 and thence continue on and pass through the warp stop 16 along with the pile warp yarns l 1.
- both the ground and terry warp yarns extend through the heddles of their respective harness members which are identified in the various figures of drawing by numerals 20, 21, 22 and 23.
- a portion of the pile warp yarns pass through the heddles of the harness member 20 to form the lower terry warp sheet shown by the dotted line 24 and the upper terry warp sheet shown at 25 as a solid line passes through the heddles of harness member 21.
- the ground warp yarns are also divided and the upper warp sheet 26 formed thereby is caused to extend through the heddles of harness frame 22.
- the remaining ground warp yarns extend through the heddles of harness member 23 and form the lower ground warp sheet shown by the dotted line 27.
- harness members during the shedding function are caused to reciprocate in a generally vertical plane in timed relation to the weaving cycle by underneath parts consisting of cam controlled treadles shown generally at 27 and top motion devices (not shown) such as a clock spring and sheave arrangement.
- the fabric 30 as it is formed is advanced by a takeup roll 33 then guided over the upper surface of a pressure roll 34. From this pressure roll the fabric is drawn downwardly by and wrapped on a cloth roll 35.
- the additional harness member for performing the function accomplished by the invention is depicted by numeral 36 and is disposed adjacent and rearwardly of harness member 23.
- the terry warp yarns ll of the upper terry warp sheet 25 in addition to extending through the heddles of harness member 21 also extend through the heddles of the additional harness member 36.
- harness members 21 and 36 are actuated simultaneously by individual pivotablc treadles 37 and 38 which receive their dictates from harness cams 39 and 40, respectively, carried on a continuously rotatable shaft 41.
- harness member 36 will on the initial downward movement of harness member 21 move upwardly a predetermined distancef, which is governed by its respective cam controlled treadle, and then automatically change its direction of travel and move downwardly with said harness member 21 to complete the crossing of the upper and lower terry warp sheets.
- This motion is effective in preventing the warp yarns from becoming slack and holds them under a desired amount of tension so as to maintain them in alignment thereby avoiding the possibility of an interference between them and the uncontrollable end of filling being extended through the warp shed.
- the upper terry warp sheet is returned to its upper position and the lower terry warp sheet is returned to its lower position.
- the upper and lower ground warp sheets are also crossed and they serve to shield the terry warp sheets from interference with the uncontrolled filling end. It is therefore not necessary to additionally tension the terry warp sheets during their return movements.
- a shuttleless loom for weaving terry fabric of the type having an external, stationary filling supply source, reciprocable carrier means for inserting picks of filling yarn in cut lengths from said source into sheds formed by the combination of ground warp and terry warp yarns, individual harness members receiving and providing individual shedding movement of upper and lower ground and terry warp sheets formed by said warp yarns, and means for maintaining the warp yarns of said upper terry warp sheet in alignment and under a predetermined minimum amount of tension when lowered by the harness member individual thereto to cross with said lower terry warp sheet which means includes a separately controllable additional harness member with both of said harness members being disposed to act simultaneously upon the warp yarns of said upper terry warp sheet.
- said alignment and tension maintaining means includes a means for raising the additional harness member a predetermined distance on the initial movement of said first harness member in a downwardly direction, to align and maintain a minimum amount of tension upon the warp yarns during pick insertion and then to lower the first and second harness members to cross the upper terry warp sheet with the lower terry warp sheet.
- alignment and tension maintaining means further includes individual cam controlled treadle members for activation of both of said harness members.
- a method of aligning the sheet of upper terry warp yarns during the weaving cycle of forming terry fabric in shuttleless looms having first and second harness members arranged to act upon said upper terry warp sheet which comprises the steps of:
- step of raising the second harness member includes aligning the warp yarns of the upper warp sheet by applying a minimum amount of tension thereto
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
Description
Claims (7)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US86154369A | 1969-09-15 | 1969-09-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3602264A true US3602264A (en) | 1971-08-31 |
Family
ID=25336095
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US861543A Expired - Lifetime US3602264A (en) | 1969-09-15 | 1969-09-15 | Terry loom warp control means and method |
Country Status (1)
Country | Link |
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US (1) | US3602264A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2339010A1 (en) * | 1976-01-20 | 1977-08-19 | Rueti Ag Maschf | DEVICE FOR THE TRANSPORT OF HAIR CHAIN THREADS FOR HAIR-FABRIC Looms |
US9534323B1 (en) * | 2016-01-09 | 2017-01-03 | Trident Limited | Terry fabric weave and resulting terry fabric |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2741270A (en) * | 1955-01-24 | 1956-04-10 | Bates Mfg Co | Apparatus for weaving tufted fabrics |
US2988113A (en) * | 1957-08-15 | 1961-06-13 | Lees & Sons Co James | Method and apparatus for weaving wireless pile fabric |
-
1969
- 1969-09-15 US US861543A patent/US3602264A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2741270A (en) * | 1955-01-24 | 1956-04-10 | Bates Mfg Co | Apparatus for weaving tufted fabrics |
US2988113A (en) * | 1957-08-15 | 1961-06-13 | Lees & Sons Co James | Method and apparatus for weaving wireless pile fabric |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2339010A1 (en) * | 1976-01-20 | 1977-08-19 | Rueti Ag Maschf | DEVICE FOR THE TRANSPORT OF HAIR CHAIN THREADS FOR HAIR-FABRIC Looms |
US9534323B1 (en) * | 2016-01-09 | 2017-01-03 | Trident Limited | Terry fabric weave and resulting terry fabric |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: DRAPER CORPORATION, Free format text: CHANGE OF NAME;ASSIGNOR:DELTA ACQUISITION CORPORATION,;REEL/FRAME:004097/0735 Effective date: 19820920 Owner name: DELTA ACQUISTION CORPORATION; HORNADAY RD., GREENS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ROCKWELL INTERNATIONAL CORPORATION;REEL/FRAME:004113/0020 Effective date: 19820321 |
|
AS | Assignment |
Owner name: CITICORP INDUSTRIAL CREDIT INC., A CORP. OF DE Free format text: SECURITY INTEREST;ASSIGNOR:DRAPER CORPORATION A CORP. OF GA F/K/A DELTA ACQUISITION CORPORATION;REEL/FRAME:004070/0533 Effective date: 19821021 |
|
AS | Assignment |
Owner name: STANCHART BUSINESS CREDIT, 200 GALLERIA PARKWAY, N Free format text: SECURITY INTEREST;ASSIGNOR:DRAPER CORPORATION;REEL/FRAME:004539/0198 Effective date: 19860328 |
|
AS | Assignment |
Owner name: DRAPER CORPORATION, GREENSBORO, NORTH CAROLINA A C Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CITICORP INDUSTRIAL CREDIT, INC.;REEL/FRAME:004664/0583 Effective date: 19860331 |