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Патент USA US2117964

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May 17, 1938.
2,117,964
J. D. KARLE
LOOP FORMING AND ATTACHING DEVICE
Filed May 13, 1936
2‘ Sheets-Sheet l
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May 17, 1938.
2,117,964
J, D, KARLE
LOOP FORMING AND ATTACHING DEVICE
'F'iled May 15, 1956
2 Sheets-Sheet 2
John D. Kamle
2,117,964
I Patented May 17, 1938
UNITED’ STATES PATENT‘ ‘OFFICE
LOOP-FORMING AND ATTAGHING DEVICE
John D. Karle, Roselle Park, N. 1., assignor ‘to
The Singer Manufacturing Company, Eliza
beth, N. J., a corporation of New Jersey
Application May 13, 1936, Serial No. 79,430
23 Claims. (0]. 112-—9)
This‘invention relates to sewing machines and tion of which is shown in elevation and another
'
r '
it has as its primary object to provide improved portion in section.
Fig. 2 is a left “side view, partly in section, of
means, preferably in the nature of an attachment
designed readily to be applied to a conventional
5 domestic sewing machine, to adapt it to produce
ornamental eifects and products not generally
produced on sewing machines.
Stated more speci?cally, this invention has as
an object to provide an improved attachment for
l0 sewing machines which will act automatically and
Fig. 1.
'
Fig. 3 is a horizontal sectional view, substan GI
tially on the line 3—3 of Fig. 1 showing the
major portion of the attachment in plan view. -
Fig. 4 represents a central vertical section sub
stantially on the line 4-4 of Fig. 1. _
- Fig. 5 is a sectional view substantially on the 10
continuously, during normal operation of the ma
chine, to form loops of wool yarn, or the like, in
advance of the stitching point, to feed the yarn
line 5-5 of Fig. 2.
Fig. 6 is .a view similar to Fig. 5 but showing, in
addition, the base material to which the yarn
loops to the stitching mechanism, by which they
loops are stitched and the action of the yarn
15 are attached at one end to an underlying base
material, and automatically'to sever the opposite
ends of the loops, the severed ends thereupon
winding and loop-severing means.
Fig. 7 is a disassembled perspective view of ele
15
merits of the yarn-winding and loop-supporting
means, later to be described.
Fig. 8 is a perspective view of a portion of one
standing erect and producing a soft, nappy sur
face such as is particularly desirable in rugs.
This product, however, is not new, as hereto
fore it has been made by manually wrapping
strands of wool yarn about a forked supporting
member, stitching the loops thus formed to a base
material, withdrawing the forked member and
' manually severing one end of the'attached yarn
loops, as by means of a pair of shears, or by a
product produced by a sewing machine equipped
with the present improved attachment.‘
Fig. 9 is a detail perspective view illustrating
the action of a yarn de?ecting ?nger, later to be
described.
'
,
‘
Referring more speci?cally to the drawings, the 25
.- invention is disclosed as applied to a sewing ma
cutter attached to the forked member. This. chine including a head ‘I carrying a presser-bar
manual operation, ‘however, was slow and tedious 2, a reciprocating needle-bar 3 carrying an eye;
and the quality of the product depended largely pointed needle 4, a work-plate 5, a throat-plate 6,
a slide-plate 1, and feeding mechanism including 30
,
30 upon the skill of the operator.
a vertically and horizontally movable feed-dog 8.
This invention has as a further ‘object to ren
der available a simple and e?icient device which Cooperating with the needle, in the formation of
readily may be attached to a conventional family stitches, is a suitable loop-taker (not shown) lo
\
sewing machine and which, when so attached, cated beneath the throat-plate.
As hereinbefore stated loops 1 of a wool yarn 1/, 35
' will automatically and rapidly produce the above
described product in uniform high quality, and or the like, are automatically and continuously
without requiring the exercise of any great formed in advance of the stitching point and par- ‘
‘amount of skill or ingenuity on the part of the allel rows of these loops are stitched successively
to each other or to a base material m, as shown
operator. >
40
Obviously differently colored yarns may be used
in various parts of the work, thereby producing
color effects or patterns in the ?nished product,
which is greatly desired in rugs, etc.
With the above and other objects in view, as
' will hereinafter appear, the invention comprises
the devices,'combinations and arrangements of
parts hereinafter set forth and illustrated in the
accompanying drawings of a preferred embodi
ment of the invention, from which the several
50 features ‘of the invention and the advantages at
tained thereby will be readily understood by those
skilled in the art.
_
In the accompanying drawings Figure 1 is a
front elevation of the improved attachment,
showing it applied to a sewing machine, one por
most clearly in Figs. 6 and 8, as the loops and the 40
material are fed past the stitching point by the
feed mechanism.
The improved device which forms the yarn
loops comprises a main supporting frame 9 adapt
ed to be removably secured to the presser-bar ‘as
by means of a screw Hi.
This frame includes a _
horizontal forwardly extending portion Ii and a
vertically arranged portion I2 which supports ele
ments of the winding mechanism, later to be de
scribed. To the end that the device may be at 50
tached to various types of domestic sewing ma— ,
chines, the shank of the frame 9 is provided with
a plurality of apertures 9* through any one of
which the screw in may be passed.
'
Secured to the under side of the portion II is a 55
2,117,904
presser-plate |3 which overlies the base material
m and normally holds it down upon the throat
of the main frame 9 and preferably is secured
thereto as by a screw 33. This extension 23c may
plate, so that it will be advanced periodically by
the feed-dog 8, in the usual manner. The edge
will be described.
l3‘ of the plate l3 serves as a guide for the previ
ously stitched row of loops, whereby the succes
sive rows are spaced uniformly.
'
4
'
Within a circular cavity l2“, formed in the
portion I2 of the frame, is secured a hardened
10. metal wear-ring l4, which, as shown most clearly
in Fig. 4, together with the portion 12, provides
a bearing for a circular disk l5 which constitutes
one element of a rotary yarn-winding member or
?ier f. The ?ier includes, in addition to the disk
15 l5, 9, ratchet-wheel "5 provided with ?ve ratchet
teeth IS‘, a tubular hub H to which both of the
members I5 and I6 are secured, and a yam
carrying tube l8 which extends through both of
said members. Yarn is led to the tube. l8, from
20 a suitable source of supply, through a so-called
self-threading guide member l9, supported by the
portion I2 of the main frame, and having its
guiding eye coaxial with the center of the rotary
winding disk l5.
'
Journaled within the hub I1, and held there
in, by a nut 20, is a spindle 2|, having an en
larged shoulder 2|a and a head 2|“. Secured to
the head 2|“, as by a screw 22, is a sheet-metal
arbor 23 about which the loops 1 of the yarn are
30 wound by the rotary motion of the ?ier f. Inter
mediate the disk l5 and the arbor 23 the por
tion 2|a of the spindle 2| carries a cylindrical
member, or drum, 24 which is cut away at 24n to
receive the shank of the arbor. The upper end
35 23*‘ of the arbor is bent forwardly and is ?tted
within the member 24, as shown most clearly in
Fig. 4. The member 24 has a portion of its pe
riphery beveled at 24b to merge into the face of
the arbor thereby to assist in placing the yarn
40 loops about the arbor.
The ?ier ,f is given a partial rotation, of_72 de
grees, at each reciprocation of the needle-bar.
Thus in ?ve reciprocations of the needle-bar the
?ier is given one complete rotation thereby plac
45 ing the yarn loop completely around the arbor 23.
This step-by-step rotation of the flier is effected
by the downward movement of an actuating
pawl 25 pivotally mounted on a stud 21 carried
by a bracket 26, removably secured to the needle
50 bar 3. The pawl is formed with a pointed end
25“ which operates in a vertically arranged slot
|2° formed in the portion |2 of the main frame
3 and engages the ratchet-teeth N58 of the disk
|6.
A coil spring 28, surrounding the stud 21 and
55 having one end 28a engaging the pawl 25 and its
other end 28b ?tted within a groove in the bracket
28, normally biases the pawl in one direction to
maintain the end 253 thereof in contact with the
ratchet disk It. Thus at each downward move
60 ment of the needle-bar the pawl 25 effects a par
tial rotation of the ?ier ,f. A spring-pressed re
taining pawl 29, carried by a stud 30, secured to
the disk I6 is adapted to engage teeth 3| pro
vided by a face-plate 32 secured to the portion l2,
05 thereby to prevent retrograde movement of the
?ier. The face-plate 32 overlies the marginal
portion of the disk l6 and thus retains the ?ier
in the cavity |2= in the main frame.
-
_
As shown most clearly in Figs. 3, 4 and 7 the
arbor 23 is curved downwardly and rearwardly
toward the needle and is provided at one side with
a loop-supporting ?nger 23b which temporarily
retains one end of the loop placed thereabout by
the flier. At its opposite side the arbor is formed
78 with an extension 23° which underlies a portion
also serve as a stationary cutter-blade as later
,
From the foregoing it will be understood that,
during normal running of the machine, loops of
yarn will be wound around the arbor 23 and, due
to the shape and arrangement of the arbor, those
loops will tend to slip down into the path of the
needle .4. To the end that the loops will be pre— 10
sented to the needle uniformly, positively actuated
loop-feeder ?ngers 33 have been provided. These
?ngers are formed as a part of a plate 34 pivot
ally mounted at 34x on the bracket 26, carried by
the needle-bar. A coil spring 35, surrounding
the pivot 34*, engages the plate 34 and normally
holds it in the position shown in Fig. 2, l. e., in
contact with a stop 33 provided by the bracket 26
and with the ?ngers 33 inv vertical alignment
with the upper curved portion 23" of the arbor.
As the needle-bar descends the spring-pressed
?ngers 33 slide downwardly over the face of the
arbor and cause the yarn loops to be forced down
wardly thereon as shown in Figs. 2 and 6. To in
sure that the ?ngers will positively feed the loops 25
and not ride over the same during the down
ward movement of the ?ngers, the arbor 23 is
provided with apertures 23‘1 into which the ?n
gers 33 enter during their downward movement
while the yarn loops are supported by the walls at 30
opposite sides of the apertures 23“.
As the yarn loops are fed downwardly on the
arbor they are stitched to the body material m by
the stitch-forming mechanism, as shown in Figs.
6 and 8, and fed past the stitching point by the 85
vaction oi’ the feed-dog 8. Those ends of the
loops which were supported on the ?nger 23b of
the arbor eventually slide oil.’ the free end thereof
and pass, uncut, beneath the supporting shank
of the main frame 3 through an unobstructed
passage indicated as p in Figs. 2, 3 and 4. Those
ends of the loops which surround the opposite
side of'the arbor are fed along the portion 23°
and are severed by cutting mechanism, later to
be described, so that the severed ends may pass 46
beyond the end of the portion 23° when it is at
tached to the main frame. Although the draw
ings illustrate the preferred form of the invention
it is to be understood that, if desired, the portion
230 may be detached from the main frame and 50
the cutting mechanism may be omitted, where
upon neither end of the loops will be severed.
The means for severing one end of the yarn
loops preferably comprises a vibratory cutter
actuating lever 31 fulcrumed at 38 on a bracket 55
39 secured to the face-plate 32, by screws 40. At
one end, the lever 31 carries a blade 4| having a
cutting edge 4|x which cooperates with an under
lying stationary cutting edge 23x formed on the
extension 23c of the arbor. At its opposite end 60
the lever,3‘| has a curved upwardly extending por
tion 31°, the inner surface 31'’ of which is nor
mally maintained in the path of a roller 42 car
ried by the stud 30‘ which-supports the retaining
pawl 29. During each rotation of the ?ier f the
roller 42 engages the surface 31'’ of the cutting
lever and swings it clockwise, as viewed in plan,
from the position shown in full lines in Fig. 3 to
the position indicated by dotted lines. This
movement of the lever causes the cutting edge
4| 1‘ of the cutter-blade to cooperate with the cut
ting edge 23* and sever one of the yarn loops surrounding the portion 23° of the arbor. A leaf
spring 43 secured to the cutter-blade 4| by screws
44 (which also serve to secure the blade to the
2,117,9a4
r 3
cutter lever) bears upon the free end of the mov
said cavity and actuated by the reciprocations of .
able cutter-blade and yieldingly holds it into cut
ting contact with the stationary cutter-blade.
The retractive movement of the cutter-lever,
i. e., the movement from the dotted line position
to the full line position in Fig. 3, is effected by
the needle-bar for winding loops of yarn about
said arbor, means for presenting said loops to the
stitching mechanism, and automatically actuated.
the action of a cutter-retum lever 45 fulcrumed
5. An attachment for sewing machines com
prising a main frame adapted to be secured to.
at 46 on the upright portion I! of the main frame
9. This lever isformed with one arm 45“, which
10 abuts an upturned portion 31° of the cutter-lever
31, and 'a second arm 45h which, during rotation
of the flier is engaged by a roller 41 loosely jour
naled on the yarn-carrying tube l8. Thls'roller
tracks an annular groove 24d in the drum 24 and
ll in its rotation engages and swings the lever 45
counter-clockwise, as viewed in Fig. 5, thereby
causing the arm 45“ to swing the cutter-lever to
its retracted position.
vAs shown by Fig. 8, the severed ends of the
loops stand upright and produce a soft nappy
means for severing one end of said loops after
they have been stitched.
‘
the presser-bar of the machine, an arbor carried
thereby, means carried by said "main frame and 10
actuated by the reciprocations of the needle-bar
for winding loops of yarn about said arbor and
for presenting said loops to the stitching mecha
nism for attaéhement to a base material located
beneath said main frame, and means including a 15
?xed blade and a cooperating horizontally mov
able blade actuated from the reciprocatory move
ments of the needle-bar for severing one end of
said loops after they have been stitched to the
base material.
20
~
surface. By successively stitching parallel rows
6. An attachment for sewing machines com
of the yarnloops to a base material and severing
prising a main frame adapted to be secured to the I
presser-bar of ’the machine, an arbor carried
mental product may be obtained. This product ' thereby, means carried byv said main frame and
one end of the loops, as above described, an orna
is used rather extensively in the making of rugs.
Various color effects and patterns may be ob
tained by the use of differently colored yarns.
To prevent the severed ends of the loops of a
previously stitched row from being inadvertently
engaged by the cutter during a subsequent opera-
actuated by the reciprocations of the needle-bar
for winding loops of yarn about said arbor, and
means for advancing said loops along said arbor
to the stitching mechanism.
‘
7. An attachment for sewing machines com
prising a main frame adapted to be secured to the —
sewing machine, an arbor carried thereby, means
carried by said main frame and actuated by the
severed loops of a preceding row and holds them ‘reciprocations of the needle-bar for winding loops
of yarn about said arbor, means including recip
down out of the path of the butter.
rocatory feeder fingers carried by the needle-bar
Having thus set forth the nature of the in
of the machine and engaging the loops held upon
vention, what I claim herein is:
said arbor to advance said loops to the stitching
I. An attachment for sewing machines com‘
. tion, the cutter-lever 31 is formed with a guard
plate or finger 31° (Fig. 3) which overlies the
prising a main frame adapted to be secured to
the presser-bar of the machine, an arbor carried
thereby, means carried by said main frame and
actuated by the reciprocations of the needle-bar
for winding loopsof yarn about said arbor and
for presenting said loops to the stitching mecha
nism for attachment to a base material located
beneath said main frame, and automatically ac
tuated means for severing one end of said loops
after they have been stitched to the base mate
rial.
2. An attachment for sewing machines ‘com
prising a main frame adapted to be secured to the
presser-bar of the machine, an arbor carried
thereby, and‘ means carried by said main frame
and actuated by the reciprocations of the needle
bar for winding loops of yarn about said arbor
55 and for presenting said loops to the stitching
mechanism.
-
3. An attachment for sewing machines com
prising a main frame adapted to be secured to
the presser-bar of the machine, a downwardly
60 and rearwardly inclined arbor carried thereby,
means including a rotary yarn carrying element
carried by said main fame and actuated by the
reciprocations of the needle-bar for winding
loops of yarn about said arbor and for presenting
said loops to the stitching mechanism for attach
ment to a base material located beneath said
main frame. and means actuated by the recipro
cations of the needle-bar for severing one end of
said loops after they have been stitched to the
70 base material.
4. An attachment for sewing machines com
prising a main frame adapted to be secured to the
presser-bar of the machine and provided with a
cavity, an arbor carried by said frame, means in
Tl cluding a rotary yarn-carrying ?ier Joumaled in
mechanism, and means for severing one end of
said loops after they have been stitched. '
8. An attachment for sewing machines com 40
prising a main frame, means to secure said frame
to a sewing machine, an arbor supported from
said main frame, and means including a rotary
yarn-carrying element carried by saidv main
frame and actuated by the reciprocations of the 45
needle-bar for forming yarn loops about said
arbor and for presenting said loops to the stitch
ing mechanism.
_
'
9. An attachment for sewing machines having
stitching, mechanism, comprising a main frame,
means to secure said frame to a sewing machine,
50'
an arbor supported from said main frame, means
including a rotary yarn carrying element carried
by said main frame and actuated by the recipro
cations of the needle-bar for forming yarn loops 55
about said arbor and for presenting said loops to
the stitching mechanism and automatically ac
tuated means, located to one side and rearwardly
of the stitching mechanism and including a sta
tionary cutter-blade and a cooperating movable 60
cutter-blade actuated by the rotary movements
of said rotary yarn-carrying element, for sever
ing one end of said loops after they have been
stitched.
10. An" attachment for domestic sewing ma 65
chines comprising a main frame adapted to be
secured to the presser-bar of the machine, an
arbor carried thereby, a rotary yarn-carrying ele
ment carried by said main frame and rotated by
the reciprocations of the needle-bar for winding
loops of yarn about said arbor and for presenting
‘said loops to the stitching mechanism, and means
actuated by the rotation of said yarn-carrying
element for severing one end of said loops after
they have been stitched.
Y
76
4
2,1 17,964
11. An attachment for sewing machines com
prising a main frame adapted to be secured to
the presser-bar of the machine, a downwardly
curved and rearwardly extending bifurcated sheet
metal arbor carried thereby, one arm of said
arbor affording a stationary cutter-blade, means
carried by said main frame and actuated by the
reciprocations of the needle-bar for winding loops
of yarn about said arbor and for presenting said
loops to the stitching mechanism, and a movable
cutter-blade supported by said frame and actu
atedvby the reciprocations of said needle-bar and
cooperating with said stationary cutter-blade for
severing one end of said loops after they have
15 been stitched.
12. An attachment for sewing machines com
prising a main frame, means to secure said frame
to a sewing machine, means including a rotary
element actuated by the reciprocations of the
20 needle-bar for forming loops of yarn and for
presenting said loops to the stitching mecha
nism, a stationary cutter-blade carried by said
frame, a movable cutter-blade pivotally mounted
on said frame and cooperating with said sta
25 tionary blade to sever the yarn loops after they
have been stitched, means actuated by the rotary
movement of said loop-forming means to give to
said movable cutter-blade its cutting stroke, and
other means actuated by said loop-forming means
30 to give the movable cutter-blade its retractive
stroke.
'
13. An attachment for conventional domestic
sewing machines comprising a ‘main frame adapt
ed to be secured to the presser-bar of the ma
36 chine, means including a rotary element carried
by said main frame and actuated by the recipro
cations of the needle-bar for forming loops of
yarn and for presenting said loops to the stitch
ing mechanism, a horizontally disposed station=
ary cutter-blade carried by said frame, a hori
zontally movable oscillatory cutter~lever ful=
cruineri on said frame and carrying a cutter=
blade which cooperates with said stationary cut~
ter=blade to sever the yarn loops after they have
45 been stitched, a roller carried by said rotary ele
ment adapted to engage said cutter-lever at one
side of its fulcrum to swing said lever in one di
rection, a cutter-return lever pivotally mounted
to advance the yarn loops along said arbor to the
stitching mechanism.
'16. An attachment forsewing machines com
prising a main frame adapted to be secured to
the presser-bar of the machine, means carried
by said main frame and actuated by the recipro
cations of the needle-bar for forming yarn loops
and for presenting said loops to the stitching
mechanism, means carried by said main frame
for severing ends of said loops after they have 10
been stitched, and guard means overlying pre
viously stitched loops to hold them out of con
tact with said loop-severing means.
17. The combination with a sewing machine
having a presser-bar, stitch-forming mechanism 15
including a reciprocatory needle-bar and a. nee
dle carried thereby, of means including a rotary
yarn winding device carried by the presser-bar
and rotated by the reciprocations of the needle
bar for forming loops of yarn in advance of the 20
stitching point, and means for advancing said
loops to the stitching mechanism.
18. The combination with a sewing machine
having a presser-bar, stitch-forming mechanism
including a reciprocatory needle-bar and a nee- ’
dle carried thereby, of means including a rotary
yarn winding device carried by the presser-bar
and rotated by the reciprocations of the needle
bar for forming loops of yarn in advance of the
stitching point, means for advancing said loops
to the stitching mechanism, and means actuated
by the rotation of said winding device to sever
one end of the stitched loops.
19. The combination with a sewing machine
having a presser-bar and stitch-forming mech
anism including a reclprocatory needle-bar and
a needle carried thereby, of an arbor located in
advance of the stitching point, means including
a rotary yarn winding device carried by the '
presser-bar and rotated by the reciprocations of 40
the needle-bar for forming loops of yarn about
said arbor, and means for advancing said loops
along said arbor to the stitching mechanism.
20. The combination with a sewing machine
having a presser-bar and stitch-forming mecha 45
nism including a reciprocatory needle-bar and a
needle] carried thereby, of a loop-supporting ar
bor sustained by said presser-bar, means includ
ing a rotary yarn winding device carried by the
on said main frame and having an arm in con
60 tact with said cutter-lever at the opposite side , presser-bar and rotated by the reciprocations of 50
the needle-bar for forming loops of yarn about
said arbor in advance of the stitching point,
turn lever to cause it to retract said cutter lever. means for advancing said loops along said arbor
14. An attachment for sewing machines com
to the stitching mechanism, and means for sever“
55 prising a main frame adapted to be secured to ingr one end of the stitched loops.
55
21. A rug making attachment for domestic
the presser-bar of the machine, a downwardly‘ curved and rearwardly extending arbor carried sewing machines comprising a main frame
thereby, means carriedby said main frame and adapted to be attached to a conventional presser
actuated by the reciprocations of the needle-bar bar, a loop-supporting arbor carried by said
for winding-loops of yarn about said arbor, means frame, a rotary ?ier journaled in said frame and 60
having a yarn-guiding eye, means including a
including loop-feeder ?ngers carried by the nee
ratchet mechanism actuated by a conventional
dle-bar and cooperating with said arbor to ad
vance the yarn loops to the stitching mechanism, reciprocatory needle-bar for rotating said ?ler
and automatically actuated means-for severing and yarn-guiding eye about one end of said ar
85 one end of said loops after they have been bor thereby to place loops of yarn thereabout, 65
means for advancing said loops along said arbor
stitched.
to the stitching mechanism, and means for sev
15. An attachment for sewing machines com
ering one end of the attached yarn loops. .
prising a main frame adapted to be secured to
22. A rug making attachment for domestic
the presser-bar of the machine, an arbor carried
70 thereby, means carried by said main frame and sewing machines comprising a main frame 70
adapted to be attached to a conventional presser
actuated by the reciprocations of the needle-bar bar and provided with a circular cavity and a
for winding loops of yarn about said arbor and connecting vertically disposed. slot. a rotary
means including loop-feeder ?ngers carried by yam-carrying ?ier journaled in the cavity in
the needle-bar and cooperating with said arbor said frame and including a ratchet wheel, a oo ll
of its fulcrum. and a roller carried by said rotary
element and adapted to actuate said cutter-re
2,117,964
operating pawl carried by the conventional re
ciprocatory neeedle-bar and projecting through
said vertically disposed slot into engagement
with said ratchet-wheel whereby the ?ier is given
intermittent rotary motions by the reciproca
tions of the needle-bar, an arbor supported co
axial with said ?ier and about which yam loops
are placed by the rotation of the latter, means
for advancing said loops along said arbor to the
10
stitching mechanism, and means for severing one
end of the attached yarn loops.
- 23. A rug making attachment for domestic
sewing machines comprising a main frame
‘
.
5
adapted to be ‘attached to a conventional presser- ‘
bar, a loop-supporting arbor carried by said
frame and providing a stationary cutter blade, a
rotary ?ler journaled in said frame and having
a yarn-guiding eye, means including a ratchet
mechanism actuated by a conventional recipro
catory needle-bar for rotating said ?ier and
yarn-guiding eye about one end of said arbor
thereby to place loops of yarn thereabout, means
for advancing said loops along said arbor to the
stitching mechanismL and means for severing
one end of the‘ stitched yarn loops. ,
JOHN D. KARLE.
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