вход по аккаунту


Патент USA US3056442

код для вставки
Oct. 2, 1962
3,05 6,43 l
Filed July l. 1958
3 Sheets-Sheet l
Oct. Z, 1962
Filed July 1, 1958
3 Sheets-Sheet 2
Hal/ffy G.Bona5<WíHíam @Arnold
Oct. 2, 1962
Filed July l, 1958
3 Sheets-Sheet 3
Wang Georâveß<>ms
United States Patent O
Patented Uct. 2, 1952
the essential parts of one example of a needle loom made
in accordance with the present invention and adapted for
the manufacture, inter alia, of the tape shown in FIG. l;
FIG. 3 is a fragmentary end elevation of part of the
Harry George Bonas and William Charles Arnold, Bur
ton-on-Trent, England, assignors to Bonas Bros.
Limited, Burton-on-Trent, England, a British company
Filed July 1, 1958, Ser. No. 745,975
Claims priority, application Great Britain July 2, 1957
2 Claims. (Cl. 139-123)
mechanism shown in FIG. 2 as seen in the direction of
the arrow A;
FIG. 4 is a fragmentary view similar to FIG. 3 and
showing a modification of the invention;
FIG. 5 is a weaving pattern for producing the tape
This invention relates to needle looms and needle loom 10 shown in FIG. l.
fabrics, and is particularly, though not exclusively, related
FIG. 6 is an end elevational view of the part of a loom
to slide-fastener tapes.
in which the present invention is embodied, and FIG. 7
Needle looms, or as they are sometimes called shuttle
is a horizontal sectional view of the needle holder and
less looms, have many advantages compared with looms
using a shuttle, especially as regards speed of output for
narrow fabrics, but they also have certain limitations par
associated parts for reciprocating and oscillating it.
As illustrated in FIGS. l to 3, adapted to reciprocate
transversely of the loom is a rod 1 carried in a housing 2
ticularly as regards the range of fabrics which they can
which is rigidly mounted to a carrier-plate 3, which in
produce. For example, it is not possible on any standard
turn isrigidly mounted to the loom frame 4. The outer
needle loom to produce a tape having a split or 2-ply
most end of the rod l carries a block 5 running in guides
edge whereas just such a tape is desirable for a slide 20 6. The rod 1 is arranged to rotate freely in the block 5
fastener tape in order that one such ply may receive the
but to have no lateral movement relative to it. The block
fastener elements whilst the other serves as a protective
5 carries a cam follower 7 which works in the track of a
or masking flap, or that the fastener elements may be
cam 8 mounted on the extremity of a cam shaft 15 such
placed between the two plies.
that a transverse reciprocating movement is imparted to
The object of the present invention is t0 enable the 25 the rod l whenever the cam 8 is rotating.
range of products of a needle loom to be extended to in
Referring to FIG. 6, it will be noted that the main ele
clude split-edge or multi-ply edge fabrics.
ments of the machine are contained in the housing 4. The
According to the invention, a needle loom is charac
main shaft 46 of the machine is driven from any suitable
terised by means for inserting alternatively any one of a
source of power such as an electric motor and the shaft
plurality of continuous weft threads, whereby fabrics 30 46 carries a series of cams operative to control the move
having a wider range, including one having a split- or
ments of levers 47 and to cause these levers to reciprocate
in a vertical arc about their pivot shaft 48. Each lever
The invention further includes the method of producing
47 is connected at one end to a link 49 which is in turn
a woven fabric in part multi-ply including the steps of lay
pivotally connected to the base of a heald frame. By -suit
ing a plurality of different weft threads alternatively in a
able disposition of the cams on the main shaft 46, the
predetermined sequence in the same plane and shedding
operator can cause the heald frames 50 to be raised and
some of the warp ends selectively in groups in such man
lowered in the desired manner to provide, for example,
ner that the warp ends of each group are shed only with
a twill weave. The heald frames 50 are mounted in a
the same weft, whereby each weft with its group of Warp
heald frame carrier which primarily consists of a plate or
ends produces a separate woven ply.
bracket 51 located at either side of the heald frames and
According ‘to one embodiment of the present invention
carrying a spindle 52 upon which are mounted flange
there is provided a needle loom characterized in that at
rollers 53 which abut against the sides of the heald
least one pair of weft needles is mounted upon a common
frames. The warps 19b and 2Gb are suitably positioned
multi-ply edge, may be produced.
reciprocable and rotatable head, means being provided in
through the eyes of the healds carried by the heald frames
use, in combination with suitable shedding of a plurality
of warp threads, alternatively to cause one needle only
of the pair to be operative to lay a weft loop within the
and as the frames are raised and lowered by the means
shed, whereby a fabric may be produced having a body
with a 2-ply edge.
In one form there are provided two pairs of needles
on the head, whereby, in use, two lengths of fabric as
aforesaid may simultaneously be woven.
Preferably the means for reciprocating and rotating the
above described, a shed will be formed through which the
weft-inserting needle 17 or 16 can pass. The dot-and-dash
lines in FIG. 6 indicate the warps.
The rod 1 is further fitted with a key 9 of suitable length
which slides freely in a keyway provided in a bearing bush
10. The bush 10 is a free fit in the end of housing 2 such
that it can rotate inside the housing 2, and in so doing
it will impart, through the key 9, rotation to the rod l,
head comprises a pair of cams mounted upon a common 55 whilst still permitting rod 1 to longitudinally reciprocate
driving shaft, cam followers being associated with each
cam respectively to cause reciproeation and rotation of
the head.
The invention will be described further, by way of ex
freely inside it. This bush 10 is further provided with
a radially projecting ar-m 10o clevised at its end and to
which is attached by pin 40 the upper end of a connecting
rod 11, the lower end of which is pivotally attached to a
ample with reference to the accompanying drawings in 60 lever armV 12. This lever arm 12 is piv'oted on a fixed
FIG. 1 is a cross section of a portion of a split- or
multi-ply tape suitable for a slide-fastener tape;
FIG. 2 is a fragmentary longitudinal section showing
shaft 13 (FIG. 3) and carries a cam follower 12a which
operates in the track of a cam 14, which in turn is mount
ed on the cam shaft 15. Shaft 15 has a pinion 41 keyed
upon it and said pinion meshes with a gear 42 driven
from a gear 44 on the main shaft 46 of the machine. Ro
tation of the cam 14 produces movement to the connecting
rod 11 causing the bush 10, and hence rod 1, to oscillate
radially through a pre-determined arc.
The cams 8 and 14 being inter-connected by the shaft
15 are arranged to cause a radial oscillation of rod 1 to
occur only at such a time in the operating cycle as when
rod 1 is retracted from the warp shed and towards the
side ofthe loom.
The innermost end of the rod 1, which projects out of
the housing 2, carries a block 19, preferably of light alloy,
into which two insertion needles 16, 17 are iitted in such
quently preventing the successive loops from being with
drawn from the warp shed.
In operation, with the change of needle as above de
scribed and the pattern as shown, a split or divided sel
vedge is formed at the needle edge of the tape, each part
45 of the selvedge being woven by one needle only, whilst
the body is formed by weft of both needles.
In weaving as above described, the weft carried by the
inoperative needle is drawn from its weft package as the
needle moves, either above or below the shed, and to
prevent this weft from becoming slack when the needle
is retracted it passes through a strongly loaded eye which
will take up such slack. This is a practice known in this
a manner and position that when the rod 1 is at either
extremity of its radial movement then one or the other
The foregoing description for the sake of simplicity
of the two needles 16, 17 is in correct alignment with a l5
covers the application of this invention to a needle loom
latch needle 18.
The latch needle 1S is adapted in known manner to
reciprocate horizontally alongside the edge of the warps
by any suitable mechanism (not shown) and is arranged
producing a single piece of fabric, but it is not so restrict
ed. FiG. 4 shows the arrangement applied to a loom
producing simultaneously two pieces of fabric, these
to pick up the loop of a weft thread when this is laid 20 pieces being positioned one above the other. Rod 1
carries at its innermost end a block 19a which in turn
across the hook 18a by either of the weft inserting
carries two sets, each of two needles, 16, 17, 16a, 17a.
needles 16, 17 . A construction of needle mechanism with
The axial position of rod 1 in relation to the two warp
which the mechanism herein described is usable, is de
sheds, and to the common beat-up reed in particular, is
scribed in our co-pending application No. 572,999.
Mounted on the loom and adjacent to the needles 16, 17 25 arranged such that when one needle 16, 17, 16a, 17a of
each pair is passing through its respective Warp shed then
are two weft tensioning devices comprising springs or
its inoperative partner passes harmlessly clear of the
other like known arrangement, through which the weft
warp threads alternately in front, then behind, the beat-up
threads coming from a convenient supply, are taken, one
reed 20a.
to the eye of each needle 16, 17.
The invention is obviously not limited to al1 the de
l In the operation and to weave the fabric shown in FIG. 30
tails above described either as regards the construction
l, during one cycle of operation one of the needles 16,
of the mechanism, the weaving pattern or the features
1_7, lsay that indicated at 16, passes through the warp
of the tape shown, as these are obviously capable of modi
shed to lay a weft thread onto the hook 18a of the latch
iication without departing from the scope of the inven
needle 18. Needle 16 then passes back out of the shed
'and when it is clear of the warp shed, then the rod 1 is 35 tion.
For instance, the alternative weft threads of which
caused to oscillate and present needle 17 to the warp shed,
there may be more than two can be presented to the
lessly above or below the warp threads and does not have
only with the even numbered ends and the other only
shed of the fabric in a different manner and by different
the shed having since changed in a suitable manner.
means than above described, and could be pulled in in
During the neXt cycle of operation needle 17 then passes
stead of taken in by a weft layer, in which case one weft
through the warp shed to lay its weft thread onto the
hook 18a of the latch needle 18, the previous loops having 40 layer could operate on either weft according to a Se
quence of selection.
been knitted and cast-off in the conventional manner.
With shedding, such as that above described, and using
During the passage of either of the needles 16, 17 through
2 weft layers changed every insertion, one weft weaves
the warp shed the inoperative needle always passes harm
operational añinity with the latch needle 18. The weaving 45 with the odd numbered ends to produce separate super
imposed plies of fabric joined to the body fabric as a 2
pattern of FIG. 5 gives one example of shedding for pro
ply selvedge. It is of course understood that the weft
duction of the tape shown in FIG. l, in which are shown
on the left hand side eighteen warp ends 19b which are
loops as is necessary with any shuttleless weave are secured
shed in groups respectively each group containing three
at the other selvedge in any known manner, as by knit
according to the width of body required.
ends down and one end up and three up and one down. 50 ting or by means of a locking warp from a shuttle. Such
method of or means for securing the weft loops is no part
At the right hand side of the figure are shown warp ends
of this invention and for brevity is not described or illus
20h which are shed 2 and 2 and of any repeat number
In a needle loom of this kind, the weft is inserted in the
Obviously, other shedding and weft inserting arrange
side opposite to that from which the needle is inserted
of the invention. For instance, by arranging the shed
so that as the needle is retracted the loop is not drawn out
of the shed. To secure the series of weft loops as above
ding for the even and odd ends to change twice con
needle. The previously-inserted loop of weft is however,
positioned around the shank of the needle 18 and thus,
as the latter is retracted from the fell of the fabric, the
just-laid loop of weft is drawn through the previously
laid loop, thus knitting the edge of the fabric and conse
gitudinally slidable, the head being disposed beyond the
form of a loop and such loop must be so secured at the 55 ments could be used without departing from the scope
secutively but alternately respectively the number of weft
changes could be halved, but the weave in the selvedge
described, the latch needle 18 is employed and it is ar
ranged to retract alongside the edge of the fabric and sub 60 plies would have the appearance of missed picks, or at
least of irregular take up but such disadvantage may be
stantially in synchronism with the reed so that when the
outweighed by the advantages of halving the number of
weft-inserting needle 16 or 17 reaches the full extent of
weft changes.
its traverse across the shed, the latch needle 18 is in
By providing additional body warp ends on the side
such position that it will pass through the loop of weft
and prevent such weft from being withdrawn from the 65 of the warp ends adjacent to what normally are the edges
of the two plies, a tubular edged fabric would be woven.
shed along with the weft-inserting needle as the latter is
We claim:
being retracted. While the weft-inserting needle is being
l. A high speed needle loom having a head provided
retracted, the latch needle 18 is moved away from the
with a plurality of needles, a rod having the head attached
fell of the fabric, thus drawing with it the end of the loop
of weft, which has just been caught in the eye of the 70 at one of its ends, a guide through which the rod is lon
guide, cam means for longitudinally reciprocating the
rod, and cam means engaging the rod and operative to
oscillate the same and thereby provide oscillating move
nient to the needle-carrying head.
2. A high speed needle loom as provided for in claim 1,
References Cited in the ñle of this patent
wherein the cam means for the reciprocation of the rod
consists of a cam having a perlpheral groove, a follower
Warsaw _____________ .__ Feb. 20, 1934
Без категории
Размер файла
488 Кб
Пожаловаться на содержимое документа