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Патент USA US3443541

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' May 13, 1969
Filed March 17. 1966
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United States Patent 0 ’
Patented May 13, 1969
rows of needles, the pivot axis of the loopers is parallel
tive to the outer rows of needles. Thus, if there are two
Ernest K. Lund, Accrington, England, assignor to Singer
Cobble Limited, Blackburn, Lancashire, England
Filed Mar. 17, 1966, Ser. No. 535,113
Claims priority, application Great Britain, Mar. 19, 1965,
11,648/ 65
Int. Cl. G05c 15/10, 3/02, 17/02
U.S. Cl. 112—79
3 Claims
to and midway between the said two rows.
Embodiments of the invention will now be described
by way of example with reference to the accompanying
diagrammatic drawings, in which:
FIG. 1 is a detail section through a tufting machine of
the invention for making a loop pile tufted fabric;
FIG. 2 is a similar detail section through a tufting ma
10 chine of the invention for making a cut pile ‘tufted fabric;
FIG. 3 is a. detail view in the direction of arrow 3 in
FIG. 1;
FIG. 4 is a plan of a needle bar for use in a machine
A tufting machine for efficiently producing pile on a
in accordance with the invention;
backing fabric is disclosed. The machine is of the type
FIG. 5 is a detail section of a further modi?cation of
having a plate across which the backing fabric is drawn 15
the invention showing offset needles; and
so that it is perforated by a multitude of needles carried
FIG. 6 is a view corresponding to FIG. 5 and shows a
upon a reciprocating needle bar. The plate has apertures
modi?ed form of the rear needle.
through which the needles protrude during a portion of
Referring now to FIGS. 1, 3 and 4, a tufting machine
the reciprocating motion of the needle bar. Beneath the
plate a plurality of loopers are arranged to engage the
yarns carried by the needles which protrude through the
backing fabric and the apertures in the plate. Upon re
traction of the needles the yarns form loops on one side
of the invention comprises a needle bar 11 and a needle
plate 12 both extending transversely of the machine. The
needle bar 11 is vertically reciprocable in the directions
shown by Arrow A and carries a plurality of needles 14.
The needle plate 12 serves as a support for backing ma
of the backing fabric. The invention resides in disposing
the needles in sets on the needle bar and providing a loop 25 terial 15 movable relative to the machine in the direction
of arrow B in conventional manner. The needle plate is
er for each set of needles. The looper is mounted to re
apertured, as at 1-6, to allow passage of the needles 14
ciprocate and each set of needles is positioned with respect
after piercing the fabric 15. Below the needle plate 12
to its looper so that the looper in one stroke engages the
is a plurality of loopers 17 mounted for pivotal motion
yarns carried by all the needles of the set and thereby
causes a plurality of loops to be simultaneously formed 30 about a common axis 18. Each looper 17 is in the form of
a hook open in the direction of movement of the fabric
upon retraction of the needles.
The needle bar 11 carries a plurality of needles 14 ar
ranged in two rows in the manner shown in FIG. 4, the
This invention relates to tufting machines.
needles being arranged in pairs aligned with the direction
Tufting machines comprise a transversely extending 35 of movement of the fabric. The pitch of the rows of
needle bar carrying a plurality of needles for carrying
needles is conveniently one eighth of an inch as is the
thread and piercing a backing fabric, a needle plate for
spacing between pairs of needles and the diameter of the
supporting a moving backing fabric and having a plurality
needle shank.
of apertures therein through which the needles pass after
The needles 14 are secured in the needle bar 11 by
piercing the backing fabric, and a plurality of loopers lo
means of grub screws 21 each extending from the respec
cated relative to the needle plate to engage respectively
tive side of the needle bar 11. Each needle 14 has an eye
threads carried by the needles after the latter have passed
23 therein through which passes the thread 24 (FIG. 3)
through the backing fabric and engaged the needle plate.
for making the loop. Slightly above the eye 23 is a gen
According to the present invention there is provided a 45 erally ?at bottomed recess 25 and the needles 14 are so
tufting machine which includes an excess of needles ove-r
arranged that both the recesses 25 of a pair of needles
loopers, the parts being so arranged that some loopers at
faces the same direction.
least are operable with a plurality of needles.
The rotational axis 18 of the loopers is located midway
In the preferred embodiment of the invention there
between the two rows of needles. The length of upper
are twice as many needles as loopers and each looper en 50 part 19 of each looper is su?‘icient to service both needles
gages the thread carried by two needles. The needles are
of the respective pair.
arranged in two rows in the needle bar and are located
In use, the fabric 15 is moved in the direction of arrow
one behind the other in the direction of movement of the
B in stepwise fashion, each step being twice the pitch of
backing fabric. The loopers will normally engage threads
the rows of needles 14, and, each needle 14 is fed with
on the same side of both needles, although the rows may 55 thread 24 from an associated yarn creel through tubing
be offset so that the line of join of the said points of two
(all not shown) in conventional manner. Immediately
adjacent needles is inclined to the rows, and in this latter
prior to the needle bar 11 moving downwards which oc~
case the loopers may conveniently be arranged to engage
curs when the fabric is stationary, the loopers 17 pivot
one needle at the one side thereof and the other needle
in a counterclockwise direction, as viewed in FIG. 1, to a
at the opposite side thereof. In this way the needles may 60 position where the hooks are out of the path of the nee
be inclined and the loopers movable in the direction of
dles. As the needless 14 pierce the fabric 15 and en
movement of the backing fabric.
gage apertures 16, the loopers 17 pivot in the clockwise
The loopers normally pivot into an operative position
direction to pass into the recess 25 so as to lie between
to engage the threads and in this case the pivot axes of
the needle 14 and the thread 24. The loopers 17 are now
the loopers will preferably be located symmetrically rela 65 in the operative position as shown in FIG. 1. When the
‘ which widens the gap between the point and path of
needles 14 are retracted, the loops of thread remain on
the looper part 19. Thereafter the fabric is moved a step
travel of the looper.
We have found that by utilising standard needles in
and the loopers again pivot counterclockwise thus releas
ing the loops supported thereon.
the front row and non-standard needles in the rear row,
the corresponding needles of front and rear rows being
Referring now to FIG. 2‘, there is shown a detail section
of an alternative embodiment which includes a needle
bar 111 and a needle plate 112. The needle bar is verti
cally reciprocable as is shown by arrow A and carries a
offset by one-sixty-fourth of an inch, and all such needles
being of one-thirty-seconds of an inch diameter, we are
able to produce a tufted fabric having a uniformly dis
plurality of needles 114. The needle plate 112 has open
tributed pile on the front face thereof and a uniform
ings 115 through which the needles may pass and such 10 and dense backstitch structure.
plate supports a backing fabric 116 movable in the direc
What we claim is:
tion of arrow B in a like manner to the backing fabric of
1. In a tufting machine of the type having:
the ?rst embodiment hereinbefore described. Below the
a needle bar mounted for reciprocatory motion,
plate 112 there is a plurality of loopers 117 each of which
a plurality of needles carried on the bar for movement
is pivotable about a common axis 118 in the manner in
dicated by arrow C. Such looper is in the form of a hook
a plate across which a backing fabric is adapted to be
having the hoop part 119 extending in a direction op
drawn, the plate having apertures through which
posed to the direction of movement of the fabric 116. The
undersurface 121 of the hook is ground and at the re
the needles protrude during a portion of the recipro
cating motion of the needle bar, and
mote end thereof is formed with a nose 122. A knife 2
123 having a ground upper surface 124 co-operates with
a plurality of loopers arranged to engage the yarns
after the needles protrude through the apertures to
this surface 121 as will be described.
The needles 114 are arranged in pairs and in rows in
similar manner to the needles 14 of the ?rst described
backing fabric when the needles are retracted
cause the yarns to form loops on one side of the
through the apertures in the plate,
embodiment. The pivot axis 118 is midway between the 25 the improvement comprising:
disposing the needles in sets on the needle bar, the
The operation of this machine is similar to the ?rst
needles being arranged in parallel rows on the nee
described machine. However, it will be appreciated that
the loopers 117 pivot in opposite directions to the loopers
17 to move from the operative position (as shown) to 30
the inoperative position. On pivoting of the looper 117
dle bar, each set being formed by needles of differ
If desired the needles can be offset slightly as is shown
in FIGURE 5 the rearmost needle 214a being displaced
to the left relative to the front needle 214b when work
ing in a direction opposite to the fabric feed, a single
tially perpendicularly to the rows,
providing a single looper for each set of needles and
mounting the looper for oscillating movement rela
to the inoperative position, the nose 122 prevents the loops
of thread 125 from passing off the loopers. Also on this
movement the ground surfaces 121 and 124 will coop
erate to sever the loops to leave a cut pile.
ent rows, the needles of a set being aligned substan
tive to the needles in the set; and
positioning each set of needles with respect to its looper
to cause the looper in one stroke of its oscillatory
movement to engage the yarns carried by the needles
of the set so that a plurality of loops are simulta
neously formed for each set when the needles are
looper 217 being arranged similarly to the loopers 17 and 40 2. The improvement according to claim 1 wherein a
117 to pivot about a common axis extending transversely
needle of a set has its point offset relative to the longi
to the direction of movement of the fabric.
tudinal axis of the needle, the point being displaced in
We have found that with the needle arrangements
the direction away from the path of the looper.
where the spacing between rows is small, that depending
3. The improvement according to claim 1 wherein the
upon the nature of the pile yarns, the loops inserted by 45 looper associated with a set of aligned needles is arranged
the rearrnost needle may pierce those inserted by the for
to oscillate about a pivotal axis disposed midway of the
ward needle if the yarn carried by the forward needle is
a bulked yarn, but that no such piercing occurs if such
References Cited
yarn has any signi?cant degree of twist.
The invention is not limited to the precise construc 50
tional details herein described and illustrated. For ex
6/1926 Huber ________ __ 112—-l65 X
ample three, four or more rows of needles in groups may
be provided as long as a single looper can cope with the
loops of all the needles of each group.
Whilst the embodiments of FIGS. 1, 2 and 5 use nee 55
dles of standard form, it has been found convenient to
use non-standard needles or a combination of standard
and non-standard needles and indeed in some circum
Braudes _________ _.. 1l2—79.5
Gebert __________ __ l12--7‘9.6
11/ 1962
11/ 1965
Reimer __________ __ 112-—165
Thompson ________ __ 112—79
Bryant et al. ______ __ 112—79
Short _____________ __ 112-79
Rockhalt __________ .. 112—79
stances such needles or a combination thereof given an
improved end product.
A non-standard needle 314a is shown in FIG. 6 and
will be seen to have a generally cylindrical shank por
tion with a through eye adjacent the lower end thereof.
2/1935 Germany.
HERBERT F. ROSS, Primary Examiner.
The point of the needle is offset relative to the longitudinal 65
axis of the shank and the needle is secured in the needle
bar so that the needle’s point is offset in the direction
US. Cl. X.R.
112—266, 410
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