US3198216A - Weft thread cutting device for shuttleless looms - Google Patents

Weft thread cutting device for shuttleless looms Download PDF

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Publication number
US3198216A
US3198216A US296274A US29627463A US3198216A US 3198216 A US3198216 A US 3198216A US 296274 A US296274 A US 296274A US 29627463 A US29627463 A US 29627463A US 3198216 A US3198216 A US 3198216A
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United States
Prior art keywords
edge
disc
fabric
loom
roller
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Expired - Lifetime
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US296274A
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English (en)
Inventor
Victor Marie Joseph Anc Marius
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BRELIC INTERNATIONAL Inc
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BRELIC INTERNATIONAL Inc
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    • 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
    • D03D49/70—Devices for cutting weft threads

Definitions

  • the present invention relates to the cutting of the ends of the weft threads along the edges of a fabric on a Weaving loom and more particularly on a shuttleless loom of the kind in which the successive wefts are inserted into the shed from a stationary weft thread supply by a weft-inserting member movable across the loom.
  • the free ends of the weft threads of a fabric are severed by being crushed between a non-cutting edge and a hard surface.
  • the latter are caused to pass repeatedly between the non-cutting edge and the hard surface.
  • the invention further concerns a weft thread severing device comprising a hard surface on which the threads to be severed are caused to pass during the advance of the fabric on the loom, a disc having a non-cutting edge of small width, .and means to pass the said disc onto the said hard surface in order to crush the said threads with a sufficient pressure to sever them.
  • the hard surface is in the form of a roller and means are provided to oscillate this roller so as to cause the weft thread ends to pass repeatedly between the roller and the crushing disc.
  • the hard surface is in the form of a stationary table and the disc is carried by a support having a reciprocating movement parallel to the edge of the fabric in order to cause the disc to roll to and fro on the table and to crush repeatedly the weft thread ends to be severed.
  • FIG. 1 is a plan view illustrating a portion of a shuttleless loom provided with a severing device according to the present invention.
  • FIG. 2 is a corresponding diagrammatical side view with parts in section along line IIII of FIG. 1.
  • FIGS. 4 and 5 are explanatory sketches which show respectively in plan view and in elevation how the protruding ends of the weft threads are displaced to and fro between the crushing disc and the hard roller.
  • FIG. 6 is a side view illustrating another embodiment of this invention.
  • FIG. 7 is a plan view corresponding to FIG. 6.
  • a disc 6 having a chamfered periphery which defines an edge 6a (FIG. 5) with a rounded cross-section of very small radius which actually behaves as a flat cylindrical surface of very small width.
  • This disc 6 i rotatably mounted on a pin '7 (FIG. 2) carried by a lever 8 pivoted on a transverse bar 9 (FIGS. 1 and 2) which is disposed below the fabric 3.
  • the lever 3 is biassed by a strong spring 10 in such manner as to apply the disc 6 against a lower roller 11 keyed on a shaft 12, the latter being rotatable by two bearings 13 and 13a (FIG. 1). Bearing 13 has been omitted in FIG.
  • the roller 11 oscillates angularly under the action of the link 16 and it frictionally imparts a similar motion to the disc 6 which is pressed against its periphery by the biassing spring 10.
  • the protruding ends which constitute the fringe 5 successively reach the zone of the rolling contact between the disc 6 and the roller 11.
  • the thread ends situated in this zone position A, FIG. 5 are caught and crushed between the edge of the disc and the peripheral surface of the roller, and they are pushed towards the front end of the loom, i.e. towards the left in FIGS. 2, 4 and 5 (position B, FIG. 5).
  • FIG. 3 clearly illustrates the operation.
  • the thin edge 6a penetrates into the. thread which is wholly or, more generally, partly severed.
  • the thread 18 again passes between the disc and the roller and is therefore again crushed between them, .and so on.
  • the edge 61 of cour e passes several times on the same point of the thread and thus finally severs it.
  • the length of the fringe 5' is of course dependent of the distance between the edge of the disc 6 and the edge of the fabric. This distance may be made quite small, the limit being that when the thread ends are displaced by the disc and the roller, they are pulled with respect to the fabric and that when the disc is too close to the latter, the angle of obliquity may become such as to cause deformation of the marginal zone of the fabric.
  • the periphery of the roller is not scratched.
  • the blunt edge of the disc does not wear in a noticeable manner and the whole device need not be revised apart from the general revisions of the loom.
  • the arm 19 oscillates together with the shaft 20, and the disc 6 rolls on the table 21 in one and the other direction, while catching and crushing the thread ends on its way, in such manner that these ends are finally severed at the appropriate distance from the edge of the fabric.
  • the thread ends which form the fringe are no more alternately displaced towards the front and the back of the loom as in the preceding embodiment.
  • they are free to advance with the fabric 3, except that they are momentarily stopped during the passage of the disc 'by being caught between the latter and the stationary table.
  • the duration of this stoppage of the advance of each thread end is absolutely negligible with respect to the quite low advancing speed of the fabric 3 and therefore nothing prevents from disposing the crushing edge 6a quite close to the edge of the fabric (FIG. 7) in order to realize a residual fringe 5 of negligible length.
  • the disc 6 thrusts aside the edge of the fabric and is not therefore liable to damage the latter.
  • Means may be provided, if desired, to rotate positively the crushing disc 6, as for instance by means of pinions which connect it with the shaft 12 in FIGS. 1 and 2, or by means of a pinion and of a stationary rack in the embodiment of FIGS. 6 and 7. It is further possible to provide means to compel the crushing disc 6 (and/or the roller 11 in the case of FIGS. 1 and 2) to rotate progressively on itself in a predetermined direction so as to ensure that the wear is uniformly distributed along the whole periphery of the disc (and/or of the roller) during the period of operation.
  • a device for severing said portions of said wefts along said one edge comprising a roller having a geometrical axis and a periphery formed as a hard substantially cylindrical surface, said roller being rotatably carried by said loom with its axis substantially perpendicular to the direction of advance of said fabric through the loom and being so disposed on said loom that the portions of said wefts to be severed pass substantially thereon during the advance of said fabric through the loom; a rota-tably supported disc having a geometrical axis and a periphery in the form of an edge of small width, with the axis of said disc parallel to the axis of said roller, said disc being disposed close to said one edge of said fab-ric and at such a position on said loom that said portions of said wef
  • a device for severing said portions of said wefts along said one edge of said fabric comprising a hard surface disposed adjacent said one edge of said fabric; a rotatable disc having a geometrical axis and a periphery in the form of .an edge of small width, the axis of said disc being substantially perpendicular to the direction of advance of said fabric through said loom; means to resiliently press said edge of said disc against said hard surface at a small distance from said one edge of said fabric; and means to cause said portions of said wefts to alternately and repeatedly pass in one direction and in the other between said hard surface and said edge of said disc so as to be crushed by said edge of said disc until they are fully severed,

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
  • Looms (AREA)
US296274A 1962-07-25 1963-07-19 Weft thread cutting device for shuttleless looms Expired - Lifetime US3198216A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR42775A FR1348370A (fr) 1962-07-25 1962-07-25 Perfectionnements au rasage des trames dépassantes, notamment pour métiers à tisser sans navette

Publications (1)

Publication Number Publication Date
US3198216A true US3198216A (en) 1965-08-03

Family

ID=9694326

Family Applications (1)

Application Number Title Priority Date Filing Date
US296274A Expired - Lifetime US3198216A (en) 1962-07-25 1963-07-19 Weft thread cutting device for shuttleless looms

Country Status (6)

Country Link
US (1) US3198216A (fr)
CH (1) CH404572A (fr)
DE (1) DE1535282B1 (fr)
ES (1) ES291785A1 (fr)
FR (1) FR1348370A (fr)
GB (1) GB1013875A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3310073A (en) * 1964-10-13 1967-03-21 Prive Des Inv S Modernes O F P Weft thread retaining and cutting device for shuttleless looms
US3347282A (en) * 1965-01-23 1967-10-17 Dornier Gmbh Lindauer Weft thread-cutting mechanism for shuttleless looms
US3451440A (en) * 1966-10-06 1969-06-24 Ramon Balaguer Golobart Cutting device for looms
US3901289A (en) * 1973-06-13 1975-08-26 Voest Ag Apparatus for forming a strong selvage in a fabric
US4498504A (en) * 1982-09-23 1985-02-12 Burlington Industries, Inc. Filling fringe waste reduction
US6634068B1 (en) * 2002-04-24 2003-10-21 Astenjohnson, Inc. Apparatus for preparing a fabric for seaming

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1909016A (en) * 1928-09-08 1933-05-16 Bay Company Manufacture of surgical bandages
US2080784A (en) * 1934-01-18 1937-05-18 Celanese Corp Loom having stationary weft supplies
FR1237767A (fr) * 1959-06-19 1960-08-05 Perfectionnements aux dispositifs de formation des bords des tissus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE285370C (fr) *
DE1068637B (fr) * 1959-11-05
US2221716A (en) * 1938-02-26 1940-11-12 Courtaulds Ltd Manufacture and production of staple fiber
FR1229693A (fr) * 1958-12-12 1960-09-08 Perfectionnements aux métiers à tisser sans navette

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1909016A (en) * 1928-09-08 1933-05-16 Bay Company Manufacture of surgical bandages
US2080784A (en) * 1934-01-18 1937-05-18 Celanese Corp Loom having stationary weft supplies
FR1237767A (fr) * 1959-06-19 1960-08-05 Perfectionnements aux dispositifs de formation des bords des tissus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3310073A (en) * 1964-10-13 1967-03-21 Prive Des Inv S Modernes O F P Weft thread retaining and cutting device for shuttleless looms
US3347282A (en) * 1965-01-23 1967-10-17 Dornier Gmbh Lindauer Weft thread-cutting mechanism for shuttleless looms
US3451440A (en) * 1966-10-06 1969-06-24 Ramon Balaguer Golobart Cutting device for looms
US3901289A (en) * 1973-06-13 1975-08-26 Voest Ag Apparatus for forming a strong selvage in a fabric
US4498504A (en) * 1982-09-23 1985-02-12 Burlington Industries, Inc. Filling fringe waste reduction
US6634068B1 (en) * 2002-04-24 2003-10-21 Astenjohnson, Inc. Apparatus for preparing a fabric for seaming

Also Published As

Publication number Publication date
GB1013875A (en) 1965-12-22
DE1535282B1 (de) 1970-12-17
ES291785A1 (es) 1963-11-16
FR1348370A (fr) 1964-01-10
CH404572A (fr) 1965-12-15

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