US3556162A - Apparatus for forming reinforced selvages of a fabric usable in combination with a shuttleless loom - Google Patents

Apparatus for forming reinforced selvages of a fabric usable in combination with a shuttleless loom Download PDF

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Publication number
US3556162A
US3556162A US768297A US3556162DA US3556162A US 3556162 A US3556162 A US 3556162A US 768297 A US768297 A US 768297A US 3556162D A US3556162D A US 3556162DA US 3556162 A US3556162 A US 3556162A
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Prior art keywords
cutter
temple
cam
cutting
loom
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Expired - Lifetime
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US768297A
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English (en)
Inventor
Toemon Sakamoto
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Enshu Ltd
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Enshu Ltd
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Priority claimed from JP3391668A external-priority patent/JPS502674B1/ja
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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
    • D03D47/40—Forming selvedges
    • D03D47/48—Forming selvedges by inserting cut end of weft in next shed, e.g. by tucking, by blowing

Definitions

  • the present invention relates to an improved apparatus for forming reinforced selvages of a fabric usable in combination with a shuttleless loom, more particularly relates to an improved apparatus for forming reinforced selvages of a fabric usable in combination with a shuttleless loom wherein filling yarns are inserted into warp sheds from given supply sources by a shuttlelike inserting carrier reciprocating through the warp sheds at each picking motion of the loom.
  • Another attempt is a method for positively folding the filling yarn ends into the warp sheds by a hook mechanism synchronizing with the running cycle of the loom.
  • Further modified method comprises inserting filling yarns in a manner principally similar to the foregoingbut synchronizing with more than four running cycles of the loom.
  • such attempts also require relatively complicated,
  • a principal object of the present invention is to provide an improved apparatus for forming reinforced selvages of a fabric usable in combination with a shuttleless loom and having relatively simple mechanical construction.
  • a further object of the present invention is to provide an improved apparatus for'forrning reinforced selvages of a fabric usable in combination with a shuttleless loom and adoptable in the actual production process at high production efficiency and low production cost.
  • the present invention relates to a use on a shuttleless loom wherein filling yarns are inserted into warp sheds in sequence from given filling yarn supply sources by a shuttle-like inserting carrier, reciprocating through the warp sheds at each picking motion. Ateach picking, the filling yarn is caught by hooks of an inserting carrierand advanced into the warp shedbeing carried by the inserting carrier.
  • the apparatus used for carrying out the present invention comprises a pair of cutters, a housing for carrying the pair of cutters, a holder arm for supporting the housing and turnably mounted on a temple roller of a loom, means for shifting the relative position between the pair of cutters according to the turning of the holder arm and secured to a templebox of the tempIeQa programming cam for actuating the turning'of the holder arm according to a crank cycle of the loom and mounted firmly upon a cam shaft which revolves in synchronism with thatof a crankshaft of the loom and means for actuating the turning of the holder arm in accordance with the revolution of the cam.
  • the apparatus of thepresent invention is further provided with .means for preventing fly back of the cut-filling yarn end.
  • FIGS. 1A to 1F are .diagrammatical explanatory drawings for showing one cycle of the operation of the present invention
  • FIG. 2 is a perspective view of anembodiment of the apparatus of the present invention and its related parts of a temple box of a loom;
  • FIG. 3 is a schematic side view 'of the apparatus shown in FIG. 2 with the depressor omitted;
  • FIGS. 4A and 4B are plan and side view, partly in section, of
  • FIG. 8 is a diagram for showing the profile of a programming cam used in the apparatus shown in FIG. 3;
  • FIGS. 9A to 9C are schematic side views for showingth'e operating conditions of the cutter assembly shown in FIG. 7;
  • FIG. 10 is a schematic side view of an improvement of the cutter assembly shown in FIG. 7.
  • filling yarns la and 1b to be inserted into the warp sheds in sequence are supplied from the respective filling yarn supply sources Zaand 2b located at the sides of a loom and advanced to the respective yarn feeders 3a" and 3b positioned close to the respective shuttle boxes 4a and 4b passing through yarn guides 6a and 6b'disposed to th'eshut tle boxes 4a and 4b.
  • Grippers 7a and 7b are disposed in the paths of the filling yarn downstream of the respective supply sources 2d and 2b, and those grippers 7a and 7b are designed so as to be actuated in synchronism with the running cycle of the loom by means of the respective transcontrol mechanisms Baand 8b connected thereto.
  • the gripper 7a is closed and, simultaneously the yarn cutter-l la advances"- into the warp shed 12 in order to cut thefillin g'yarn In at a position slightly in side of the selvage of the fabric 9.
  • the cut end portion of the filling yarn la which remains is compacted to the cloth fell by the beating motion of the reed together with the newly inserted filling yarn la, woven into the construction of the fabric 9 in a folded condition and a reinforced selvage construction is formed on this side of the fabric 9.
  • the gripper 7a is put in an opened condition and the other gripper 7b is still maintained in an opened condition.
  • the inserting carrier 13 When the crank cycle of the loom approaches the back dead center again, the inserting carrier 13 is driven out of the shuttle box 4b towards the opposite shuttle box 4a by the picking motion of the loom as shown in FIG. 1E. At the moment when the inserting carrier 13 reaches half way of its path, the yarn cutter llb advances into the warp shed 12 to cut the filling yarn lb at a position slightly inside of the selvage of the fabric near the shuttle box 4b and, simultaneously, the gripper 7b is closed to restrict yarn supply from the supply source 2b.
  • FIG. 1F The operational condition shown in FIG. 1F is quite similar to that shown in FIG. 1C.
  • the filling yarn 1b downstream of the hook 14 of the inserting carrier 13 slides longitudinally over the hook l4 and is placed in a substantially straight condition in the warp shed 12.
  • the yarn cutter IIb returns to its rest position.
  • the end portion of the filling yarn lb which remains is compacted to the cloth fell, woven into the construction of the fabric and a reinforced selvage construction is formed on this side of the fabric 9.
  • FIGS. 2 and 3 an embodiment of the apparatus of the present invention is shown.
  • the mechanical arrangement of the parts related to a temple box of the loom is almost the same with that of the ordinary weaving loom, a temple box 21 is secured to a temple rod 22 of the loom by a supporting arm 23, the temple rod 22 is mounted on a bracket 24 secured to a frame 26 of the loom, and a temple roller 27 is inserted over a temple roller spindle 28 disposed within the temple box 21.
  • a holder arm 31 is tumably inserted over the temple roller spindle 28 in a coaxial condition .with the temple roller 27 at a position outside of the temple roller 27.
  • a lateral projection 32 is formed horizontally. (See FIG. 4A).
  • a sector wheel 33 secured to the boss of the holder arm 31 is tumably mounted on the temple roller spindle 28.
  • a rack 34 is slidably supported by a rack guide 36 secured to the temple box 21 and the forward end portion of the rack 34 is provided with an aperture 37 formed therethrough.
  • An operating lever 38 is tumably mounted on the temple rod 22 at a stem portion thereof, a top end portion thereof is provided with a lateral projection 39 engaging with the aperture 37 of the rack 34 and a bottom end thereof is provided with a cam follower 41 which is pressed against a profile of a programming cam 42 by a spring 43.
  • the programming cam 42 is mounted firmly upon a cam shaft 44 which rotates in synchronism with a crankshaft of the loom.
  • the periphery of the programming cam 42 is composed of a circular portion and a suitably profiled portion the details of which will be explained in a later description.
  • a cam-actuated cutter assembly 51 is disposed and the detail construction and arrangement of the cutter assembly 51 are shown in FIGS. 3, 4A, 43, A, 58, 6A and 6B.
  • the cutter assembly 51 is alternately placed in a working condition wherein same is ready to perform a cutting operation and a nonworking condition, as hereinafter described, and comprises a housing 52 for carrying a pair of cutters consisting of a movable cutter 53 and a stationary cutter 54.
  • the housing 52 is secured at a stern portion 56 thereof to the lateral projection 32 of the holder arm 12 by a setscrew 57 as is shown in FIG.
  • the curved aperture 58 is provided with a curvature whose center of curvature falls on the central axis of the temple roller spindle 28.
  • the inside surface of the stem portion 56 of the housing 52 is provided with a straight projection 59 firmly embedded therein.
  • the cutters 53 and 54 are carried by the housing 52 with their tail portions slidably inserted into the housing 52 in a side by side-assembled arrangement as shown in FIG. 3. The lateral disposition of the cutters 53 and 54 with respect to the selvage of the fabric 9 can be adjusted by changing the setting position of the holder arm 31 along the temple roller spindle 28.
  • the movable cutter 53 is provided with a stepped portion 61 for receiving the stationary cutter 54 formed along the entire length of the cutter 53.
  • One end of the cutter 53 is rounded and provided with a cutting blade 62 and a substantially square cutoff portion 63 formed just behind the blade 62.
  • a longitudinal slit 64 is formed through the stem thereof and, at a position closer to that end of the cutter 53, a straight pin 66 is firmly and laterally embedded in the stem of the cutter 53.
  • the cutter 53 as a whole and the longitudinal slit 64 are provided with curvatures whose center of curvatures falls on the central axis of the temple roller spindle 28 when the cutter 53 is carried by the housing 52.
  • the stationary cutter 54 is provided with a cutting blade 67 formed at one end thereof and a hole for receiving the straight projection 59 of the housing 52 formed through the stem of the cutter 54 at another end portion thereof.
  • the stationary cutter 54 is coupled with the movable cutter 53 riding upon the stepped portion 61 of the latter. So, the stationary cutter 54 should also be provided with a curvature adapted to that of the movable cutter 53.
  • the stationary cutter 54 is shown in a condition engaged with the straight projection 59 of the housing 52.
  • a resilient means or spring 68 is disposed to the stem of the cutter 54 in such a manner that one end of the spring 68 is secured to the projection 59 and the other end thereof is inserted and hooked into a small cutoff 69 of the cutter 54.
  • FIG. 7 The assembled condition of the holder arm 31, the housing 52, the movable cutter 53 and the stationary cutter 54 is shown in FIG. 7, wherein the movable cutter 53 is carried by the housing 52 in such a manner that the straight projection 59 of the housing 52 extends and passes through the longitudinal slit 64 of the movable cutter 53.
  • the stationary cutter 54 rides on the stepped portion 61 of the movable cutter 53 and is pressed against the stem of the movable cutter 53 by the spring 68.
  • One end of the spring 68 is secured to the straight projection 59 extending through the hole of the stationary cutter 54.
  • a putting means comprising stopper holder 71 is secured to the rack guide 36 andis provided with a curvature whose center of curvature falls on the central axis of the temple roller spindle 28.
  • two stoppers 72 and 73 are formed upwardly.
  • the stoppers 72 and 73 are so arranged that a free turning of the holder arm 31, that is of the housing 52, around the temple roller spindle 28 causes the portion of the laterally extending pin 66 of the movable cutter 53 to alternately about or contact with the stoppers 72 and 73 to thereby put the cutting assembly in either its working or nonworking condition.
  • a cutting device 74 is turnable mounted on the temple roller spindle 28 so as to cut the filling yarn ends in combination with a cutter receiver 76 secured to the rear end portion of the temple box 21.
  • FIG. 8 An embodiment of the profile of the programming cam 42 is shownin FIG. 8 As is apparent from the operational stages shown in FIGS. IA to IF, the apparatus of the present invention is required to perform one cycle of its complete operation with every two crank cycles of the loom. Therefore the use of a tappet shaft of the loom isrecommended as the cam shaft 44 for supporting the programming cam 42. Thus, the designation of the angle attached to the outer circle in the drawing corresponds to the crank angle of the loom over two crank cycles.
  • Cam 42 consists of 7 different peripheries, a large circu-Who periphery GA corresponding to the revolution angle of the crankshaft of 390 C., a steep periphery AB corresponding to 66,a slightly projecting periphery BD corresponding to 54, a small circular periphery DE corresponding to I0O nd a steep periphery EG corresponding to 1
  • the rotating direction of the cam 42 is designated with an arrow 77 in the drawing. This rotating direction corresponds to the relative disposition of the rotatable roller 41 and the cam 42 shown in FIG. 3, and changes in the relative disposition between the two lead to change in the direction accordingly.
  • FIGS. 9A, 9B and 9C The operation of the apparatus of the present invention having the above-described mechanical construction is as hereinafter explained, reference being made to FIGS. 9A, 9B and 9C.
  • the follower 41 begins to contact the periphery CD and this causes a further counterclockwise turning of the holder arm 31 together with the cutter assembly 51 around the temple roller spindle 28 from the condition shown in FIG. 913 to that shown in FIG. 9C.
  • the cutter assembly 51 turns counterclockwisely in the drawing together with the holder arm 31.
  • the cutting device 74 cuts the end of the filling yarn inserted into the warp shed in the preceding crank cycle projecting out of the selvage of the fabric 9 in cooperation with the cutter receiver 76 secured to the temple box 21.
  • the cutter assembly 51 is maintained in the condition shown in FIG. 9C which corresponds to that shown in FIG. 18 while the follower 41 contacts the periphery DE of the cam 42.
  • FIG. 3 An improvement of the apparatus shown in FIG. 3 is shown downwardly in order to hold the filling yarn la between'the j warp yarns 83 of the lower sheet of the warpshed and'the warp yarns 82 pressed downwardly prior to cutting. Thus fly back of the cut filling yarn end can be effectively prevented, resulting. in formation of a reinforced selvage.
  • An improved apparatus for forming reinforced selvages of a fabric in combination with a shuttleless loom having temple boxes each containing a temple roller spindle comprising: a holder arm pivotally mounted on a temple roller spindle of said temple box; a cam-actuated cutter assembly operable when put in a working condition to cut filling yarns comprising a housing secured to said holder arm, a movable cutter mounted for movement relative to said housing and a stationary cutter fixed to said housing cooperative with said movable cutter to effect a cutting operation, one end of said movable cutter having means defining a cutoff receptive of a filling yarn, a laterally extending pin connected to the other end of said movable cutter, and resilient means for urging both said cutters into pressure contact; putting means for putting said cutter assembly in said working condition comprising a fixedly mounted stopper holder, and a pair of spaced-apart stoppers connected.
  • An improved apparatus for forming reinforced selvages of a fabric wherein said last-mentioned means comprises a sector wheel pivotally mounted on a temple roller spindle of said temple box, an operating lever turnably disposed to a temple rod of said loom, a rack meshing with said sector wheel and connected at one end thereof to an upper end of said operating lever and a cam follower connected to the bottom end of said operating lever.

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  • Textile Engineering (AREA)
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US768297A 1967-10-20 1968-10-17 Apparatus for forming reinforced selvages of a fabric usable in combination with a shuttleless loom Expired - Lifetime US3556162A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6754767 1967-10-20
JP3391668A JPS502674B1 (de) 1968-05-20 1968-05-20

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103306021A (zh) * 2013-06-14 2013-09-18 新昌鹤群机械有限责任公司 一种织机折入边装置的凸轮
US20170107648A1 (en) * 2014-06-13 2017-04-20 Picanol Selvedge forming device for a weft thread
US20260002299A1 (en) * 2024-06-30 2026-01-01 Newbolt Ltd. Freeform weaving loom

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1968073A (en) * 1929-12-09 1934-07-31 Celanese Corp Shuttleless loom
US3090405A (en) * 1958-06-04 1963-05-21 Dewas Raymond Process for the formation of selvedges on looms
US3340902A (en) * 1966-03-17 1967-09-12 Marshall John D Method and apparatus for forming tucked-in selvage
FR1518797A (fr) * 1967-01-24 1968-03-29 Perfectionnements aux métiers à tisser sans navette

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1968073A (en) * 1929-12-09 1934-07-31 Celanese Corp Shuttleless loom
US3090405A (en) * 1958-06-04 1963-05-21 Dewas Raymond Process for the formation of selvedges on looms
US3340902A (en) * 1966-03-17 1967-09-12 Marshall John D Method and apparatus for forming tucked-in selvage
FR1518797A (fr) * 1967-01-24 1968-03-29 Perfectionnements aux métiers à tisser sans navette

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103306021A (zh) * 2013-06-14 2013-09-18 新昌鹤群机械有限责任公司 一种织机折入边装置的凸轮
CN103306021B (zh) * 2013-06-14 2015-07-08 浙江鹤群机械股份有限公司 一种织机折入边装置的凸轮
US20170107648A1 (en) * 2014-06-13 2017-04-20 Picanol Selvedge forming device for a weft thread
US9915015B2 (en) * 2014-06-13 2018-03-13 Picanol Selvedge forming device for a weft thread
US20260002299A1 (en) * 2024-06-30 2026-01-01 Newbolt Ltd. Freeform weaving loom

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