US3669155A - Weaving machines with continuous weft feed - Google Patents

Weaving machines with continuous weft feed Download PDF

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Publication number
US3669155A
US3669155A US32131A US3669155DA US3669155A US 3669155 A US3669155 A US 3669155A US 32131 A US32131 A US 32131A US 3669155D A US3669155D A US 3669155DA US 3669155 A US3669155 A US 3669155A
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United States
Prior art keywords
perforations
tape
strips
strip
length
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Expired - Lifetime
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US32131A
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English (en)
Inventor
Raymond Dewas
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Individual
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Individual
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Assigned to HAYNES INTERNATIONAL, INC. reassignment HAYNES INTERNATIONAL, INC. ACKNOWLEDGEMENT, RELEASE AND TERMINATION AGREEMENT Assignors: SOCIETY BANK, INDIANA, N.A.
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    • 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
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/275—Drive mechanisms
    • D03D47/276—Details or arrangement of sprocket wheels

Definitions

  • the invention relates to weaving machines with continuous weft feed from bobbins situated outside the shed, comprising at least one weft inserter at the end of a tape of which the path of travel outside the shed is generally determined by an upper horizontal guide and an arcuate guide, usually extending over half a circumference, followed by a conduit extending underneath the machine to the interior of the latter, the said tape consisting of at least two superimposed strips finnly interconnected solely by their front end comprising the weft inserter, this system enabling them toperform relative movements in the curved portions of their path of travel, the said strips also having perforations which engage a toothed tape-driving wheel.
  • the present invention provides a solution to this problem, by an arrangement of which the principle consists of the provision, over at least one part of the length of one of the strips of which the tape consists, of perforations corresponding to the dimensions and to the pitch of the teeth of the wheel on the engaging radius of the said strip, while the corresponding perforations of the other band or bands are given an additional length of a magnitude and direction corresponding to the difference in length between the engaging are, based on the middle portion, by which engagement is made with the strip or strips having enlarged perforations, on the one hand, and that by which engagement is made with those having normal perforations, on the other hand, this arrangement being applicable in the converse manner to the respective strips in other parts of the tape.
  • the perforations can be provided according to this principle in several different ways, as will appear in due course, and an external guide may or may not be used for the curved portion of the tape.
  • FIG. 1 is an elevation of one end of a slay of a weaving machine with weft feed from large bobbins situated outside the shed, the guides and the guide bow for the tape, and also the wheel for driving the needle, according to prior art, the side of the guides nearest to the observer having been removed.
  • FIG. 2 shows, on a larger scale and in perspective, the configuration presented by a tape with two strips, according to prior art.
  • FIG. 3 is an elevation of the general layout of the construction covered by the invention, the functions of driving the tape and returning it to the bottom of the machine being performed by a toothed wheel, the side of the guiding devices which is nearest to the observer having been removed.
  • FIG. 4 is an elevation in which the tape is assumed to have been out along its axis, theconditions under which the tape engages, in a first embodiment of the invention, being shown schematically.
  • FIG. 5 is a view provided on the same principle to that of FIG. 4, showing a second embodiment of the invention.
  • FIG. 6 is a view provided on the same principle to those of FIGS. 4 and 5, showing an embodiment of the invention obtained by combining the two methods shown in the aforemen tioned FIG. 4 and 5.
  • FIG. 7 is a view drawn on the same principles as FIGS. 4 and 5, showing one embodiment of the invention, as applied to a tape made up of three strips.
  • 1 is the slay, 2 the tape, 3 the toothed wheel carried by a shaft 4 to which a reciprocating rotatory motion is imparted, 5 the horizontal upper guide situated outside the shed and forming a tangent to the upper part of the said wheel, and followed by the guides 6 which penetrate the shed, 7 the bow bywhich the tape is returned to the bottom of the loom, where the said tape is guided in the lower channel 8, the movement of the tape in the bow 7 involving friction and a strip brake effect.
  • the two strips of the tape 2 are provided with registering perforations 9, as it is only in the form of a rectilinear rack that the said tape engages the upper part of the wheel 3.
  • the tape 10 is flexing round the wheel 11, which both operates it and returns it to the bottom of the machine.
  • the wheel 11 is caused to rotate in alternating directions by the shaft 12, which itself is actuated by a mechanism not shown in the drawing 5 and 8 are the upper guiding device, outside the shed, and the lower guide channel, respectively.
  • the tape 10 consists of two strips 13 and 14, superimposed and interconnected solely by their front extremities, e.g. by means of rivets 15. This end of the tape comprises the weft inserter (not shown).
  • the upper zone of the wheel ll ismarked A," and this same letter A" will be used for those parts of the tape which are situated in the same zone of the wheel. Similarly, B" will be employed for that part of the tape which is situated in the lower zone 8" of the wheel.
  • the length of the perforations 16 of the inner strip 13,. as considered in the direction of engagement, corresponds to the thickness e" of the teeth 18 of the wheel 11, and the pitch of these perforations is equal to the circumferential pitch of the said teeth, measured half-way across the thickness of the strip 13.
  • the front and rear engagement flanks of all the perforations 16 of that part of the inner strip which is flexing round the wheel are in contact with the flanks of the teeth 18.
  • the perforations 17 of the outer strip 14 are provided, in respect of the perforations 16 of the inner strip 13, with an extra length, situated on that side of the engagement flank of the perforations of the said outer strip which is further away from the front extremity of the tape; said extremity, as already mentioned, comprises the weft inserter.
  • FIG. shows another embodiment, in which it is the outer strip 14 that is provided with perforations of a length corresponding to the thickness of the teeth 18 of the wheel 11 it is thus to the perforations 16 of the inner strip 13 that the modification through the enlargement of the perforations is applied, on that side of the engagement flank of the said perforations which is nearer to the front end of the tape, i.e. the end comprising the weft inserter.
  • FIG. 4 shows that in the zone A the two strips participate in the compressive stresses to which the tape is subjected, and that in zone B there is only one as a contrast, only one strip participates in the extension of the tape in zone A, whereas both strips are involved in zone B.
  • FIG. 6 shows a method of providing this transition zone, confined to the length of the are over which the tape is flexing onto the wheel, and illustrated in its engagement position on the said are.
  • That part of the tape which is situated between the weft inserter and the zone A of the wheel 11, i.e. the part MA, is constructed in accordance with the method shown in FIG. 4
  • the part NB, situated between the rear end N of the tape and the zone B of the wheel 11, is constructed in accordance with the method shown in FIG. 5.
  • the perforations are produced as follows on the outer strip, at pitch P for the front flanks and at pitch p for the rear flanks on the inner strip, at pitch p for the front flanks and at pitch P for the rear flanks.
  • the perforations made at pitch p and belonging to the part MA are prolonged as far as B
  • the perforations made at pitch P and belonging to the part NB are prolonged as far as A on the inner strip 13
  • the pitch p of the part MA is prolonged as far as B for the front flanks
  • the pitch P of the part NB is prolonged as far as A for the rear flanks of the perforations.
  • This combination of the two perforation pitches causes the said perforations to have a length which increases from A towards B where the inner strip 13 is concerned, while on the outer strip 14 it decreases.
  • FIG. 7 shows an example of the application of this method to a tape 10 having three strips, in which it is the central strip, 19, that is perforated for normal engagement, the inner strip, 20, having perforations corrected in accordance with FIG. 5, while the method shown in FIG. 4 is applied to the outer strip, 21.
  • This ensures, in zones A and B, engagement contact on the superimposed flanks of the central strip, 19, and one of the other strips, inner or outer, according to the direction taken by the stresses, and thus simultaneously, either at A and B or at A and B.
  • This system ensures that in zone A, which is that most directly subjected to the inertia effects of the weft inserter, there will at all times be two strips participating in the stresses, in one direction or in the other.
  • the wheel 11 and the guides 5 and 8 may be independent from the slay l and the guides 6.
  • a system for driving a weft inserter actuating tape in a loom comprising a driving wheel rotating alternately in opposite directions, said tape being constituted by a plurality of superimposed strips flexing on said driving wheel over a predetermined arc of said wheel, said driving wheel having regularly spaced peripheral teeth, said superimposed strips having perforations to engage the teeth of said driving wheel, at least one portion of at least one of said strips being provided with normal perforations the pitch and size of which mate with the pitch and size of said teeth of said driving wheel, while each other strip is provided with corresponding perforations each having an extra length equal to the difference between the lengths of the middle portions of said one strip and said other strip, respectively, over said are of said driving wheel.
  • a system in accordance with claim 1, comprising a tape consisting of two strips, and characterized by the fact that only the perforations of the outer strip have an extra length equal to the aforementioned difference, on that side of their engaging flank which is the farther away from the front end of the tape, connected to the weft inserter.
  • a system in accordance with claim 1, comprising a tape consisting of two strips, and characterized by the fact that only the perforations of the inner strip have an extra length equal to the aforementioned difference, on that side of their engaging flank which is the nearest to the front end of the tape, connected to the weft inserter.
  • a system in accordance with claim 1, comprising a tape consisting of two strips, and characterized by the fact that the tape possesses three zones of different perforations, namely in a first zone on substantially its front half-length which is connected to the weft inserter, normal perforations for the inner strip and for the outer strip perforations with the aforesaid additional length on the side of the perforation flanks situated on the side remote from the weft inserter with respect to said perforations in a second zone over substantially the rear half length normal perforations on the outer strip and for the inner strip perforations having the aforesaid extra length on the side of the perforation flanks situated, with respect to the latter, on the side of the weft inserter and in a third zone a central transition zone in which the length of the perforations of both strips progressively passes from the size of the aforesaid front part to that of the aforesaid rear part.
  • a system according to claim 1, comprising a tape with more than two strips, characterized in that one of the two strips has normal perforations, the perforations of each of the other strips having the aforesaid extra length towards the front or the rear of the tape in accordance with a strip located inwardly or outwardly, respectively, with respect to the strip with normal perforations.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Woven Fabrics (AREA)
  • Looms (AREA)
  • Decoration Of Textiles (AREA)
US32131A 1969-04-30 1970-04-27 Weaving machines with continuous weft feed Expired - Lifetime US3669155A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU58543 1969-04-30

Publications (1)

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US3669155A true US3669155A (en) 1972-06-13

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US32131A Expired - Lifetime US3669155A (en) 1969-04-30 1970-04-27 Weaving machines with continuous weft feed

Country Status (9)

Country Link
US (1) US3669155A (de)
JP (1) JPS5010984B1 (de)
CH (1) CH516670A (de)
DE (1) DE2020765C3 (de)
ES (1) ES379611A1 (de)
FR (1) FR2040431A1 (de)
GB (1) GB1275323A (de)
LU (1) LU58543A1 (de)
SU (1) SU373958A3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3998248A (en) * 1973-12-04 1976-12-21 Ruti Machinery Works Ltd. Weft band with carrier for looper looms

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1135816B (it) * 1981-05-15 1986-08-27 Vamatex Spa Disposizione di comando del moto delle pinze di trasporto della trama in telai di tessitura senza navette
JPH09176934A (ja) * 1995-12-27 1997-07-08 Toyota Autom Loom Works Ltd レピア織機に用いるスプロケットホイール及びレピアバンド並びにレピア織機における緯入れ装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151085A (en) * 1936-11-21 1939-03-21 Dewas Raymond Needle weaving loom
US2548663A (en) * 1946-03-01 1951-04-10 Crompton & Knowles Loom Works Weft needle mechanism for axminster looms
US3159184A (en) * 1962-11-13 1964-12-01 Draper Corp Tape motion for shuttleless looms

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151085A (en) * 1936-11-21 1939-03-21 Dewas Raymond Needle weaving loom
US2548663A (en) * 1946-03-01 1951-04-10 Crompton & Knowles Loom Works Weft needle mechanism for axminster looms
US3159184A (en) * 1962-11-13 1964-12-01 Draper Corp Tape motion for shuttleless looms

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3998248A (en) * 1973-12-04 1976-12-21 Ruti Machinery Works Ltd. Weft band with carrier for looper looms

Also Published As

Publication number Publication date
CH516670A (fr) 1971-12-15
LU58543A1 (de) 1971-06-22
FR2040431A1 (de) 1971-01-22
DE2020765B2 (de) 1973-08-16
SU373958A3 (de) 1973-03-12
DE2020765A1 (de) 1970-11-05
ES379611A1 (es) 1973-01-16
JPS5010984B1 (de) 1975-04-25
GB1275323A (en) 1972-05-24
DE2020765C3 (de) 1974-03-14

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AS Assignment

Owner name: HAYNES INTERNATIONAL, INC., INDIANA

Free format text: ACKNOWLEDGEMENT, RELEASE AND TERMINATION AGREEMENT;ASSIGNOR:SOCIETY BANK, INDIANA, N.A.;REEL/FRAME:014468/0279

Effective date: 19960923