US3920052A - Terry warp feeding apparatus - Google Patents

Terry warp feeding apparatus Download PDF

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Publication number
US3920052A
US3920052A US408351A US40835173A US3920052A US 3920052 A US3920052 A US 3920052A US 408351 A US408351 A US 408351A US 40835173 A US40835173 A US 40835173A US 3920052 A US3920052 A US 3920052A
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US
United States
Prior art keywords
terry
warp
compensator
rod
terry warp
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
Application number
US408351A
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English (en)
Inventor
Howard I Nelson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Crompton and Knowles Corp
Original Assignee
Crompton and Knowles Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Crompton and Knowles Corp filed Critical Crompton and Knowles Corp
Priority to US408351A priority Critical patent/US3920052A/en
Priority to DE19742446353 priority patent/DE2446353A1/de
Priority to CA210,848A priority patent/CA1018047A/en
Priority to BE149289A priority patent/BE820788A/xx
Priority to FR7434537A priority patent/FR2248352B1/fr
Priority to JP49116233A priority patent/JPS5070652A/ja
Priority to GB45214/74A priority patent/GB1479510A/en
Priority to IT53656/74A priority patent/IT1021879B/it
Priority to BR8796/74A priority patent/BR7408796D0/pt
Priority to CH1418074A priority patent/CH606550A5/xx
Priority to CS747264A priority patent/CS194709B2/cs
Application granted granted Critical
Publication of US3920052A publication Critical patent/US3920052A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

  • This invention relates to terry looms and more particularly to improvements in the feeding of terry warp from a terry warp beam to the weaving instrumentalities of such looms.
  • terry looms are equipped with a positive feeding device or terry warp let-off which is driven by a ratchet mechanism controlled by a pattern device for quickly withdrawing and delivering terry warp from the terry warp beam to the weaving instrumentalities at the time that the terry loops are being formed.
  • the terry warp beams are very heavy and require a large pulling force to overcome the inertia of the beam. Since the terry warp has to be fed over a short period of time, the terry warp let-off must function veryquickly. This results in a very abrupt and strong pulling force which causes stretching and possible breakage of the terry warp. There is also a possibility of overrunning the warp beam once that its inertia has been overcome, thus affecting the accuracy of terry warp feed.
  • the objects of the invention are accomplished by providing a positive feeding mechanism for drawing terry warp from the terry beam throughout most of the entire terry cycle which includes, in most cases, two partial beat-ups followed by a full beat-up, Many types of positive feed devices could be used provided that the feed is spread out over a relatively long period of time.
  • a movable compensator is located between the positive feeding mechanism and the weaving instrumentalities and includes a surface for engaging the terry warp. Actuating ,means move the compensator so that this surface moves toward the terry warp during most of the terry cycle for holding the warp under tension as it is being drawn from the terry beam. The actuating means move the compensator so that the terry warp engaging surface moves away from the terry warpto release it to the weaving instrumentalities during the portion of the terry cycle when the warp is needed for forming the terry loops.
  • FIG. 1 is a side elevation of a terry'loom with the invention applied thereto, portions being broken away;
  • FIG. 2 is a fragmentary view on an enlarged scale of a portion of the actuating means.
  • DETAILED DE- SCRIPTION OF THE INVENTION Referring to the drawings there is shown a terry loom, generally indicated at 10., which includes a frame 12, a lay 14, a reed attached to the lay, heddles 16, a ground warp beam 18 and a terry warp beam 20.
  • the ground warp, indicated at 22, is formed in sheds through which weft is inserted to form the base cloth.
  • the terrywarp lies in both the upper and lower sheds indicated by dot and dash lines 26 and 28, respectively.
  • the loom is operated in cycles of three weft insertions or picks.
  • the reed 15 is brought to a position rearward of the fell of the cloth for the first two picks for partial beat-ups and to the fell during the third pick for a full beatup.
  • This partial beat-up point is indicated at 30 and the full beat-up point is indicated at 32 coincident with the fell.
  • the reed is shown in the partial beat-up position 30.
  • the terry warp which had been crossed from the first pick to the second will be pinched between the two weft yarns inserted during the first two picks.
  • the weft yarns will slide along the ground warp to the fell and the terry warp which extends between the two beat-up positions will be formed into terry loops. It is during this period that demand for terry warp is greatest.
  • the apparatus for positively feeding terry warp is indicated generally by the reference numeral 34 and includes two abutting feed rollers 35 and 36 which are fixed to shafts 37 and 38, respectively, rotatably mounted in frame 12.
  • a ratchet gear 39 is fixed to shaft 37.
  • Terry warp 24 extends down from beam 20 to roll 35, between rolls 35 and 36, and down from roll 36.
  • the mechanism for rotating ratchet gear 39 includes a pawl 40 pivotally connected at 41 to one arm of a first bell crank lever 42 which is pivoted on shaft 37.
  • a first rod 44 is pivoted at 46 to the other arm of lever 42 and pivoted at 48 to one arm of a second bell crank lever 50 which is pivoted at 52.
  • a second rod 54 is pivoted at 56 to the other arm of lever 50 and pivoted at 58 to a lever 60 pivoted on a shaft 62.
  • a follower 64 is attached to the end'of lever 60 and is held in engagement with the surface 66 of a cam 68 by a spring 70.
  • Cam 68 is fixed to a shaft 72 which makes one rotation for every three weft insertions or picks.
  • Cam 68 is effective to reciprocate lever 60 once during each three pick cycle.
  • first and second bell crank levers 42 and 50 willalso be rocked counterclockwise and pawl 40 will advance ratchet 39 counterclockwise the distance of one tooth.
  • Surface 66 is designed so that pawl 40 advances the ratchet 39 over a relatively large por-
  • the terry warp which is drawn from the beam 20 by I the positive feeding-apparatus is taken up by a movable compensator generally indicated by the reference numeral 71 and includes a lever 73 pivoted at 74 to the loom frame 12 and a bar 76 which extends across the width of the loom.
  • Bar 76 has a rounded surface 78 for engaging the terry warp.
  • One end of a third rod 80 is pivotally connected at 82 to a lever 84 which is fixed to bar 76.
  • the other end of rod 80 is pivotally connected at 86 to a lever 88 pivotally connected at 90 to the frame l2.
  • One end of a fourth rod 92 extends through an opening 93 in the lower end of lever 88.
  • the opposite end of rod 92 is pivotally connected at 94 to a lever .96 pivoted on shaft 62.
  • a follower is attached to the end of lever 96 and is held against the surface 102 Ofa cam 104 by a spring 106.
  • Cam 104 is fixed to shaft 72 and makes one rotation for every three picks. Referring to the upper end of rod 92, there is a first compression spring 107 loosely mounted on rod 92 between a first collar 108 and one side of lever 88.
  • a first compression spring 107 loosely mounted on rod 92 between a
  • second spring 110 is loosely mounted on rod 92 be tween a second collar 112 and the opposite side of lever 88.
  • Collars 108 and 112 are slidably mounted on rod 92 and can be fixed to any desired position on the rod by screws 114.
  • Rod 92 is reciprocated by cam 104 once for every three picks. Movement of rod 92 upwardly as viewed in the drawings urges spring 107 against lever 88 and rocks it clockwise. This causes lever 73 to rock clockwise and move surface 78 towards the terry warp to take up the warp emerging from roll 36. When rod 92 is moved downwardly as viewed in the drawings, spring 110 is urged against the opposite side of lever 88 and rocks the lever in a counterclockwise direction. The effect of the counterclockwise rocking of lever 88 causes lever 73 to be rocked counterclockwise and move surface 78 away from the terry warp and make terry warp available to the weaving instrumentalities.
  • Surface 102 of cam 104 is designed so that surface 78 moves toward the terry warp during much of the rotation of the cam, preferably the first two picks and a portion of the third pick of a three pick cycle. Surface 78 will be moved away from the terry warp relatively quickly a little before and during the portion of the third pick when terry loops are being formed so that enough terry yarn will be available under a minimum of tension for forming the terry loops. This quick motion is produced by the rather sharp rise indicated at 116 in cam surface 102.
  • Springs 107 and 110 are effective to dampen the initial surge of motion from rod 92.
  • spring 107 allows rod 92 to be moved more than would be necessary to move surface 78 the exact amount required to take up all of the terry warp emerging from the feed rolls 35 and 36. This will compensate for variations in warp feed and maintain the terry warp under tension during the period of time it is being accumulated by compensator 71.
  • Means are also provided for disengaging the pawl 40 for weaving sections of flat cloth or borders where no terry loops are formed.
  • the loom is equipped with a pattern mechanism or dobby 118 and mechanism, not shown, under control of the dobby causing the reed to beat'up to the fell on every pick for continuous full beat-ups.
  • pawl 40 is rocked clockwise and lifted out of engagement with ratchet gear 39 by linkage means generally indicated at 120 which are controlled from the dobby 118.
  • Means, not shown, are also provided for disengaging shaft 72 during weaving of flat cloth.
  • feeding means for the terry warp comprising:
  • a. positive feed means for drawing terry warp from said supply beam at the same rate for partial beatups and full beat-ups
  • a movably mounted compensator having'a surface for engaging said terry warp between said positive feed means and reed;
  • actuating means driven in timed relation with said reed for moving said compensator so that said surface is moved toward terry warp to maintain them under tension during the portion of each terry cycle when terry loops are not being formed and away from said terry warp to release terry warp for loop forming during the portion of each terry cycle when terry loops are being formed.
  • said actuating means includes a resilient connection acting on said compensator to maintain said terry warp under tension when said surface is moved toward said terry warp.
  • actuating means comprises:
  • said resilient connecting means comprises:
  • a second spring operatively connected to said compensator for urging said compensator so that said surface is moved away from said terry loops upon tensioning of said second spring
  • said actuating means comprises:
  • a first compression spring mounted on said rod for engagement with one side of said lever and which is compressed by said rod when said rod is moved in said first direction, said first compression spring being effective when compressed to urge said surface toward said terry warp yarns;
  • a second compression spring mounted on said rod for engagement with the opposite side of said lever and for compression by said rod upon movement of said rod in said second direction, said second compression spring being effective when compressed to urge said surface away from said terry warp.
  • an elongated member attached to the other end of said lever and extending across the width of the loom, said elongated member having a rounded surface for engagement with said terry warp.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US408351A 1973-10-23 1973-10-23 Terry warp feeding apparatus Expired - Lifetime US3920052A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US408351A US3920052A (en) 1973-10-23 1973-10-23 Terry warp feeding apparatus
DE19742446353 DE2446353A1 (de) 1973-10-23 1974-09-26 Polkettenzufuehr-vorrichtung fuer webstuehle
CA210,848A CA1018047A (en) 1973-10-23 1974-10-07 Terry warp feeding apparatus
BE149289A BE820788A (fr) 1973-10-23 1974-10-07 Perfectionnements aux metiers pour tissus eponge et analogues
FR7434537A FR2248352B1 (pt) 1973-10-23 1974-10-09
JP49116233A JPS5070652A (pt) 1973-10-23 1974-10-11
GB45214/74A GB1479510A (en) 1973-10-23 1974-10-18 Terry warp feeding apparatus
IT53656/74A IT1021879B (it) 1973-10-23 1974-10-21 Perfezionamento nei telai per la fabbricazione di tessuti a spugna
BR8796/74A BR7408796D0 (pt) 1973-10-23 1974-10-22 Aperfeicoamentos em tear para tecido felpudo
CH1418074A CH606550A5 (pt) 1973-10-23 1974-10-23
CS747264A CS194709B2 (en) 1973-10-23 1974-10-23 Loop warp threading in apparatus for terry looms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US408351A US3920052A (en) 1973-10-23 1973-10-23 Terry warp feeding apparatus

Publications (1)

Publication Number Publication Date
US3920052A true US3920052A (en) 1975-11-18

Family

ID=23615925

Family Applications (1)

Application Number Title Priority Date Filing Date
US408351A Expired - Lifetime US3920052A (en) 1973-10-23 1973-10-23 Terry warp feeding apparatus

Country Status (11)

Country Link
US (1) US3920052A (pt)
JP (1) JPS5070652A (pt)
BE (1) BE820788A (pt)
BR (1) BR7408796D0 (pt)
CA (1) CA1018047A (pt)
CH (1) CH606550A5 (pt)
CS (1) CS194709B2 (pt)
DE (1) DE2446353A1 (pt)
FR (1) FR2248352B1 (pt)
GB (1) GB1479510A (pt)
IT (1) IT1021879B (pt)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4294290A (en) * 1978-06-30 1981-10-13 Ruti Machinery Works Ltd. Process and loom for the production of pile fabrics
US4949759A (en) * 1988-07-27 1990-08-21 Tsudakowa Corp. Seersucker loom with tension regulation of puckering warp
US6520217B2 (en) * 2000-08-28 2003-02-18 Sulzer Tessile Srl Weaving machine transmission for the control of the stroke of a sley shaft

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US645525A (en) * 1898-06-25 1900-03-13 George F Hutchins Loom.
US1665274A (en) * 1923-08-09 1928-04-10 Jr Charles Eugene Neisler Attachement for looms
US3746052A (en) * 1971-07-16 1973-07-17 Cannon Mills Co Method and apparatus for feeding terry warps in looms

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5142233A (ja) * 1974-10-05 1976-04-09 Sakuhei Fujita Endopureetoitsutaikaootobairyaaaamuno seizohoho

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US645525A (en) * 1898-06-25 1900-03-13 George F Hutchins Loom.
US1665274A (en) * 1923-08-09 1928-04-10 Jr Charles Eugene Neisler Attachement for looms
US3746052A (en) * 1971-07-16 1973-07-17 Cannon Mills Co Method and apparatus for feeding terry warps in looms

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4294290A (en) * 1978-06-30 1981-10-13 Ruti Machinery Works Ltd. Process and loom for the production of pile fabrics
US4949759A (en) * 1988-07-27 1990-08-21 Tsudakowa Corp. Seersucker loom with tension regulation of puckering warp
US6520217B2 (en) * 2000-08-28 2003-02-18 Sulzer Tessile Srl Weaving machine transmission for the control of the stroke of a sley shaft

Also Published As

Publication number Publication date
DE2446353A1 (de) 1975-04-24
BR7408796D0 (pt) 1975-08-05
FR2248352B1 (pt) 1978-06-09
BE820788A (fr) 1975-02-03
GB1479510A (en) 1977-07-13
JPS5070652A (pt) 1975-06-12
CS194709B2 (en) 1979-12-31
FR2248352A1 (pt) 1975-05-16
CH606550A5 (pt) 1978-11-15
CA1018047A (en) 1977-09-27
IT1021879B (it) 1978-02-20

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