US3556162A

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

Info

Publication number: US3556162A
Application number: US768297A
Authority: US
Inventors: Toemon Sakamoto
Original assignee: Enshu Ltd
Current assignee: Enshu Ltd
Priority date: 1967-10-20
Filing date: 1968-10-17
Publication date: 1971-01-19
Anticipated expiration: 1988-01-19
Also published as: CH488833A

Abstract

An improved apparatus for forming reinforced selvages of a fabric on a shuttleless loom. A filling yarn inserted into a warp sheds from a given supply source by a reciprocating inserting carrier is positively cut by a cutting apparatus at a position slightly inside the selvage simultaneously with a positive restriction of yarn supply and the cut end of the yarn which remains is woven into the selvage. Cutting operation of the apparatus at a given moment is caused by a revolution of a programming cam synchronized with the crankshaft revolution. Fly back of a cut end of the yarn can be prevented by a warp yarn depresser disposed to the apparatus.

Description

United states Patent Toemon Sakamoto Inventor Shizuoka-ken, Japan Appl. No. 768,297

Filed Oct. 17, I968 Patented Jan. 19, 1971 Assignee Enshu Limited Shizuokn, Japan a company of Japan Priority Oct. 20, 1967, May 20, I968 J p 42/ 67547 and 43/ 339 l 6 u.s.c| 139/122,

139/125, 139/302 Int. Cl 003d 47/40 FieldofSearch 13 9/122 Primary Examiner-Henry S. J audon Attorneys-Robert E. Burns and Emmanuel J. Lobato ABSTRACT: An improved apparatus for fonning reinforced selvages of a fabric on a shuttleless loom. A filling yarn inserted into a warp sheds from a given supply source by a reciprocating inserting carrier is positively cut by a cutting apparatus at a position slightly inside the selvage simultaneously with a positive restriction of yarn supply and the cut end of the yarn which remains is woven into the selvage. Cutting operation of the apparatus at a given moment is caused by a revolution of a programming cam synchronized with the crankshaft revolution. Fly back of a cut end of the yarn can be prevented by a warp yam depresser disposed to the apparatus.

PATENTEB JAN] 9 I97: I

sum 5 or 7 PATENTED JAHIQIQH 33556; 162

- sum 7 m7 INVENTOR ATTORNEY APPARATUS FOR FORMING REINFORCED SELVAGES OF A FABRIC USABLE IN COMBINATION WITH SIIUTTLELESS LOOM i 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.

It is generally known that, in case of weaving a fabric on a shuttleless loom of the above-described type, filling yarns to be inserted into the warp sheds must be cut at given positions inside the selvages of thefabric, and this cutting of thefilling yarns further required provision of means for reinforcing selvages of the fabric. In accordance with the requirement, there havebeen proposed various methods and apparatus for attaining the object. One of the attempt utilizes doup warps. Warps in the selvage portions of the fabric are woven in a doup warp construction, thereby slippage of filling yarn ends being prevented. However, this method requires relatively complicated mechanical attachments such as a shedding motion for gauge and leno weaving. 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. However, such attempts also require relatively complicated,

consequently expensive, mechanical attachments to the loom.

Therefore, only a few devices had appeared on market which could be well utilized in the actual production process.

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. i

As is already described, the present invention relates toa 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.

passing through the warp shed.

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. More preferably, the apparatus of thepresent invention is further provided with .means for preventing fly back of the cut-filling yarn end.

The abovedescribed shift of the relative position between the pair of cutters actuates the cutting operation of the cutters, and cutting of the inserted filling yarn is completed at a given moment of the crank cycle of the loom.

Further features and advantage of the present invention will be apparent from the ensuing descriptions, reference being made to the accompanying drawings.

FIGS. 1A to 1F are .diagrammatical explanatory drawings for showing one cycle of the operation of the present invention;

the front 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

sembled condition of a cutter assembly used in the apparatus shown in FIG. 3;

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.

Referring to FIGS. 1A to IF, the operational concept of the present invention is diagrammatically shown in sequence with designation of the corresponding crank cycles. In the arrangement shown in the drawings, 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. Slightly inside of the selvages of the woven fabric 9, a pair of yarncutters 1 1a and 11b are positioned in such a manner that they are actuated alternatively 'in m with the running cycle of the loomxlnsertionof the fillingyarn into the warp sheds 12 is carried out by a shutsynchronr tlelike inserting carrier 13 provided with at least one hook 14 disposed therein and reciprocating through the warp sheds 12.

The relative disposition of the members at a moment near 1 lb are maintained at their receded positions. r

At the moment shown in FIG. 18, that is near the back center of the crank cycle, the picking motion has taken place and the inserting carrier 13 is driven out of theshuttlebox 4a to draw out the filling yarn In from the: supply sourcela. At

the moment when the inserting carrier l3 has completed about half of its travel through the warp shed-l2, 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.

During the remaining travel of the inserting carrier 13, that is the period near the top center of the crank "c'ycle,'the gripper 7a is maintained ina closed condition, that is supply of the filling yarn la from the supply source 2a is restricted; So, the filling yarn la downstream of the hook 14 of the inserting car-- rier I3 slides longitudinally over the hookI4 as the inserting carrier 13 continuous its travel toward theshuttle box 4b located on the opposite side of the loom and is placed in a subdead center of the crank cycle is shown in FlG.lA, wherein the inserting carrier 13 still rests in the shuttle box 4a l in the condition just before the picking motion, the respective" filling yarns la and 1b are connected to the respective selvages of the fabric 9, the respective grippers: 7a and 7b are main tained in an opened condition and both yarn cutters lla'and 4b of the opposite side. On the side of the warp sheet near the shuttle box 4a, 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. In this stage of the operation, the gripper 7a is put in an opened condition and the other gripper 7b is still maintained in an opened condition.

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.

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.

One cycle of the operation of the present invention is completed by the above-described six operational stages shown in FIGS. 1A to IF, and the woven fabric 9 is provided with reinforced selvage constructions.

Referring to FIGS. 2 and 3, an embodiment of the apparatus of the present invention is shown. In the embodiment shown in the drawings, 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. In the top end portion of the holder arm 31, 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. In a meshing condition with this sector wheel 33, 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. As is apparently understood from the drawing, 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.

At the top portion of the holder arm 31, 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. 4A and the inside of the housing 52 is closed by a cover 55 provided with a curved aperture 58 formed therethrough as shown in FIG. 4B. 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.

Referring to FIGS. 5A and 5B, the construction of the movable cutter 53 is shown in detail. 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. Near the other end of the cutter 53, 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. As is shown in FIG. 5B, 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.

Referring to FIGS. 6A and 6B the stationary cutter 54 and its related elements are shown in detail. 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. As is already described, 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. In the drawing, the stationary cutter 54 is shown in a condition engaged with the straight projection 59 of the housing 52. In this condition, 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. Thus, when the stationary cutter 54 is assembled with the movable cutter 53, the former is pressed towards the latter by the spring 68 for assuring a tight and stable coupling between the two.

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.

The straight pin 66 of the stationary cutter 54 extends beyond the cover 55 through the curved aperture 58 of the cover 55. Thus thestationary cutter 54 is stationary with respect to the housing 52 and always moves together with the housing 52 only when the housing 52 is moved. On the contrary, the movable cutter 53 is movable with respect to the housing 52. The extend of the independent movement of the movable cutter 53 is equal to that of the movement of the straight projection 59 within the longitudinal slit 64 of the movable cutter 53. During this movement, the stationary cutter 54 resultingly slides over the stepped portion 61 of the movable cutter 53. This movement of the movable cutter 53 with respect to the housing 52 and the stationary cutter 54 may be caused by an external force loaded perpendicularly to the straight laterally extending pin 66 of the movable cutter 53.

Referring back to F lGS. 2 and 3, 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. At both ends of the stopper holder 71, 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.

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- Iar 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.

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.

In a condition shown in FIG. 1A, that is, a period when the crank cycle of the loom is near the front dead center, the cam follower 41 contacts the periphery GA of the programming cam 42 and the cam-actuated cutter assembly 51 is inthe nonworking condition shown in FIG. 9A. As the reed (not shown) of the loom begins its receding movement as shown in FIG. 15, that is the crank cycle of the loom approaches the bottom center, the follower 41 comes in'contact with the steep periphery AB. In this region of the periphery of the cam 42, the distance between the periphery and the center of the cam shaft 44 is reduced gradually as the revolution of the cam 42 advances, the operating lever 38 is turned counterclockwisely in FIG. 3 around the temple rod 22 by the contracting force of the spring 43, the rack 34 is moved leftwardly in FIG. 9A, the sector wheel 33 meshing with the rack 34 is turned counterclockwisely around the temple roller spindle 28 and the holder arm 31 is also turned around the temple roller spindle 28 together with the sector wheel 33. Thus the condition of the cutter assembly 51 changes from a nonworking condition shown in FIG. 9A to a working condition shown in FIG. 93 wherein the cutter assembly is ready to perform a cutting operation. During the period in which the periphery BC of the cam 42 is in contact with the follower 41, the distance between the periphery and the center of the cam shaft 44 is kept constant and the cutter assembly 51 is maintained in the condition shown in FIG. 9B. In the condition shown in FIG. 9B, the cutoff portion 63 of the movable cutter 53 is inserted into the warp shed I2 and the straight pin 66 of the movable cutter 53 is put in a contacting condition with the stopper 72 of the stopper holder 71. During this period, the cutter assembly 51 is maintained in a condition such that it is waiting for the insertion of the filling yarn, and the warp shed 12 is maintained in a fully opened condition. With further advancement of the revolution of the crankshaft of the loom, the inserting carrier 13 is driven'out of the shuttle box 4a into the warp shed 12 carrying the filling yarn la and the filling yarn 1a thus conducted into the warp shed 12 passes through the eutoff 63 of the movable cutter 53. When the inserting carrier 13 has completed about half of its travel through the warp shed 12 as is shown in FIG. IB, 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. During this turn ing movement of the holder arm 31,. the cutter assembly 51 turns counterclockwisely in the drawing together with the holder arm 31. However, as the movement of the movable cutter 53 is obstructed during this period on account of the contact of the straight pin 66 with the: stopper 72, the housing 52 slides over the movable cutter 53, the stationary cutter 54 is carried together with the housing 52 and a relative displacement between the movable cutter 53 and the stationary cutter 54 is realized. On account of this relative displacement between the

cutters

53 and 54, the cutoff portion 63 of the movable cutter 53 is closed by the stationary cutter 54 and the filling yarn 1a passing through the cutoff portion 63 is cut by the cutting blade 67 of the stationary cutter 54 as shown in FIG. 9C Simultaneously with this cutting of the filling yarn 14 by the pair of cutters, 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. As the follower 41 comes in contact with the periphery EG of the cam 42, the distance between the periphery and the center of the cam shaft 44 increases, the follower 41 recedes from the center of the cam shaft 44, the operating lever 38 is turned clockwisely in the drawing around the temple rod 22 against the contraction force of the spring 43, the rack 34 is moved rightwardly in the drawing, the sector wheel 33 meshing with the rack 34 is turned clockwisely, the holder arm 31 is also turned clockwisely around the temple roller spindle 2 8a nd the cutter assembly 51 returns from the condition shown in FIG. 9C to that shown in FIG. 9A. During this returning movement of the cutter assembly 51, the straight pin 66of 'the movable cutter 53 contacts the stopper 73 of the stopper holder 71 at the moment when the angular point F of the periphery of the cam 42 comes in contact with the follower 41. Thus the returning movement of the movable cutter 53 is obstructed while the housing 52 and the stationary cutter54 continue their returning moment and the movable cutterf53 is again brought back to the starting disposition within the hous ing 52. The condition shown in FIG. 1C corresponds to theai'igular point G of the periphery of the programming cam 42. During the next one cycle of the crankshaftrevolution, thefollower 41 contacts the periphery GA of the cam 42 and-the cutter assembly 51 is kept in its rest positionas shown in FIGS.

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.

While the invention has been described in conjunction with certain embodiments thereof, various changes and modifications thereof can be made without departing from the spirit and scope of the invention.

Iclaim:

1. 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. to said stopper holder alternately abuttable with said laterally extending pin in response to movement of said holder arm to put said cutter assembly in said working condition; a programming cam fixedly mounted upon a cam shaft revolving in synchronism with that of a crank shaft of said loom; and means for effecting pivotal movement of said holder arm and actuation of said cutter assembly in response to the revolution of said programming cam.

2. An improved apparatus for forming reinforced selvages of a fabric according to claim 1, 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.

3. An improved apparatus for forming reinforced selvages of a fabric according to claim 1 further comprising cutting means for cutting filling yarn ends extending out of said selvages simultaneously with cutting operation by said cutter assembly.

4. An improved apparatus for forming reinforced selvages of a fabric according to claim 3, wherein said cutting means comprises a cutting device turnably mounted on a temple roller spindle of said temple box and secured to a boss of said holder arm and a cutter receiver secured to a rear end portion I of said temple box.

5. An improved apparatus according to claim 1, wherein said programming cam is profiled to effect cutting of said inserted filling yarn by said cutter assembly at an angular position halfway between an angular position corresponding to departure of said pirnless shuttle from a shuttle box on one side and an angular position corresponding to arrival of said pirnless shuttle into a shuttle box on the other side.

Claims

1. 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 to said stopper holder alternately abuttable with said laterally extending pin in response to movement of said holder arm to put said cutter assembly in said working condition; a programming cam fixedly mounted upon a cam shaft revolving in synchronism with that of a crank shaft of said loom; and means for effecting pivotal movement of said holder arm and actuation of said cutter assembly in response to the revolution of said programming cam.

4. An improved apparatus for forming reinforced selvages of a fabric according to claim 3, wherein said cutting means comprises a cutting device turnably mounted on a temple roller spindle of said temple box and secured to a boss of said holder arm and a cutter receiver secured to a rear end portion of said temple box.