US3525369A - Condenser blade for air jet looms - Google Patents

Condenser blade for air jet looms Download PDF

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Publication number
US3525369A
US3525369A US760170A US3525369DA US3525369A US 3525369 A US3525369 A US 3525369A US 760170 A US760170 A US 760170A US 3525369D A US3525369D A US 3525369DA US 3525369 A US3525369 A US 3525369A
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US
United States
Prior art keywords
weft
guide member
air
slot
surface portion
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
US760170A
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English (en)
Inventor
Karel Vystrcil
Josef Nespechal
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.)
Vyzkumny a Vyvojovy Ustav Zavodu Vseobecneho Strojirenstvi
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Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3525369A publication Critical patent/US3525369A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/60—Construction or operation of slay
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms

Definitions

  • a guide member to be used in a condenser assembly of an air jet loom having a substantially ring-shaped configuration with inner and outer peripheral surfaces and formed with a slot extending therebetween, so that it can be separated from the weft.
  • the inner peripheral surface of the guide member at a location opposite the slot being provided with a configuration adapted to brake the movement of air therethrough and thus balance the air stream with respect to the slot.
  • the present invention relates to weaving looms.
  • the invention relates to air jet looms in which it is customary to employ, instead of a shuttle, a jet of air for directing the weft across the warp.
  • a jet of air for directing the weft across the warp.
  • the Svaty patent overcomes this disadvantage by increasing the speed of the air jet through the guide member to create what appears to be a partial vacuum within the ring sucking air into the inner periphery of the guide member through the slot resulting in a movement toward the center of the ring of the line of maximum speed.
  • One object of this invention is to provide a guide member structure which will improve the picking of the weft as a result of a substantial improvement in the aerodynamics of air flow in the air condenser to assure a proper movement of the picked weft while suspended in the air stream and directed across the warp.
  • the guide member has at its inner periphery, at a location opposite the slot, a configuration which brakes the movement of the air through the guide member at the location situated opposite the slot, so that in this way the jet has its part which flows at maximum speed, and in which the weft is located, spaced from the slot.
  • This braking means takes, in accordance with the invention, the form of a part of the inner peripheral surface of the guide member which is situated opposite the slot and which has a slope different from the remainder of the inner peripheral surface of the guide member.
  • FIG. I is an elevation of one possible condenser guide member of the invention.
  • FIG. 2 is a section of the guide member of FIG. 1, taken in the plane of the line 22 of FIG. 1;
  • FIG. 3 shows an elevation of another embodiment of a condenser guide member according to the invention.
  • FIG. 4 is a section similar to that of FIG. 2 but showing still another guide member structure according to the invention.
  • the guide member of the present invention is mounted together with a series of additional guide members in a known sley (not shown), with these guide members coaxially aligned one beside the other to guide the air jet across the warp.
  • the sley brings about the conventional reciprocating movement displacing the air condenser guide members between the operative positions which they have during picking of the weft through the shed and the displaced positions which they have during the beating up of the weft.
  • Each guide member includes an elongated foot or mounting portion 1 which at its upper end branches into a pair of elongated portions 2 and 3 providing the guide member with its generally ring-shaped configuration.
  • the part 2 is curved while the part 3 is straight extending along an axis parallel to the axis of the foot 1.
  • These branches 2 and 3 terminate in surfaces which are spaced from each other to define a slot 4 also parallel to the axis of the foot 1 by means of which the weft may be slipped out of the ring.
  • the parts 2 and 3 of the guide member define a substantially circular opening 5 in the guide member, through which opening a jet of air is directed for picking the weft through the shed.
  • the inner surface of the guide member is defined in part by a circumferential surface portion 6 which forms part of a cone whose apex points in the direction in which the weft is picked.
  • the inner peripheral surface of the blade has a configuration which provides means for braking the movement of the air at that part of the opening 5, which is most distant from the slot 4.
  • This braking means takes the form of an inner surface portion 7 of the guide member which has a slope different from the remainder 6 of the inner surface portion.
  • the inner surface portion 7 in the embodimentillustrated in FIGS. 1 and 2 has a taper ratio which is larger than the circumferential surface portion 6 that forms the remainder of the inner peripheral surface of the guide member.
  • the inner surface portion 7 which forms the braking means tapers in the same direction as the remainder 6 of the inner surface portion, the inner surface portion 7 is more steeply inclined and forms part of acone whose apex angle is greater than the apex of the cone of which the surface 6 forms a part.
  • the braking means is formed by an inner surface portion 7 situated opposite the slot 4 and forming part of a cylinder whose axis coincides with the central axis of the opening which extends in the direction of weft movement.
  • the inner surface portion 7 of this embodiment forms part of a cylinder whose axis is parallel to the weft picking axis, while the remainder 6 of the inner surface portion is inclined in the same way as in FIGS. 1 and 2 so that in this case also it forms part of a cone whose apex points in the direction of weft movement.
  • the braking means is formed by an inner surface portion 7 situated opposite a slot 4 but inclined oppositely to the inclination of the remainder 6 of the inner surface portion which still forms part of a cone whose apex points in the direction of weft movement.
  • the braking means is formed by inner surface portion 7" which forms part of a cone whose apex points in the direction opposed to the direction of weft picking.
  • the airjet which carries the weft is braked at the inner surface portions 7, 7' and 7, respectively, of the guide members so that the aerodynamic balance of the air stream is upset and deviated away from its normal course. This deviation is oppositely directed from that created by the loss of air through the slot and as a consequence reestablishes the theoretical balance of the air stream within the center of the aperture.
  • this braking of the air movement is achieved because additional air is sucked in at the surface portion 7 as a result of the enlarged taper ratio of the surface portion 7 as compared to the surface portion 6.
  • FIG. 3 where the surface portion 7 forms part of a cylinder, and in the case of FIG.
  • the region of maximum speed of the air jet is shifted away from the slot 4 and placed closer to the theoretical position along the center of the aperture 5.
  • a proper flight of the weft through the condenser is thus assured, by displacing the weft from the slot to the center of the guide member during this operation.
  • the structure of the invention can be used in air jet looms where a condenser made up of an assembly of these guide members is provided.
  • each of said guide members includes a foot extending outwardly from the outer periphery thereof for mounting said guide member on a rotatable sley, the foot being disposed along an axis parallel to said slot.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US760170A 1968-09-17 1968-09-17 Condenser blade for air jet looms Expired - Lifetime US3525369A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US76017068A 1968-09-17 1968-09-17

Publications (1)

Publication Number Publication Date
US3525369A true US3525369A (en) 1970-08-25

Family

ID=25058301

Family Applications (1)

Application Number Title Priority Date Filing Date
US760170A Expired - Lifetime US3525369A (en) 1968-09-17 1968-09-17 Condenser blade for air jet looms

Country Status (4)

Country Link
US (1) US3525369A (enrdf_load_stackoverflow)
CH (1) CH482040A (enrdf_load_stackoverflow)
FR (1) FR1570976A (enrdf_load_stackoverflow)
GB (1) GB1191196A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4127149A (en) * 1976-07-14 1978-11-28 Nissan Motor Company, Limited Weft yarn guide
US4907627A (en) * 1988-10-27 1990-03-13 Picanol Nv Weft guide and shed retainer for a fluid jet loom

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0019418A1 (en) * 1979-05-18 1980-11-26 Bonas Machine Company Limited Weft guide means

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4127149A (en) * 1976-07-14 1978-11-28 Nissan Motor Company, Limited Weft yarn guide
US4907627A (en) * 1988-10-27 1990-03-13 Picanol Nv Weft guide and shed retainer for a fluid jet loom

Also Published As

Publication number Publication date
FR1570976A (enrdf_load_stackoverflow) 1969-06-13
DE1760667A1 (de) 1971-12-02
GB1191196A (en) 1970-05-06
DE1760667B2 (de) 1976-03-25
CH482040A (de) 1969-11-30

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