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Патент USA US3060529

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Oct. 30, 1962
_ M_|-|11_1_
3,060,518 ‘
APPARATUS FOR DOFFING COILED SLIVER
Filed March 29, 1961
‘
Inventor
A ttorneya
United States Patent 0 M:1C6
3,060,518
Patented Oct. 30, 1962
2
1
tor, this operation may conveniently be initiated, when
3,960,518
APPARATUS FOR DOFFING COILED SLIVER
Moore Hill, Belfast, Northern Ireland, assignor to James
Mackie & Sons Limited, Belfast, Northern Ireland, a
company of Great Britain
Filed Mar. 29, 1961, Ser. No. 99,298
Claims priority, application Great Britain Apr. 5, 1960
7 Claims. ((31. 19-159)
the pile of sliver has reached a su?lcient size, by means
of a manually controlled valve which admits pressure
?uid to the cylinder While a second valve controlled by
movement of the rods to the limit of their travel diverts
the pressure fluid to the other end of the cylinder to
retract the rods. When the rods have returned to their
retracted position, a third valve cuts off the supply of
pressure ?uid.
This invention relates to machines for the processing 10
A construction in accordance with the invention will
now be described by way of example with reference to
of textile ?bres which emerge from the machine in the
the accompanying drawings in which:
form of a sliver in readiness for a further stage of proc
FIGURE 1 is a diagrammatic elevation partly in sec‘
essing. In order that the sliver may conveniently be
fed to the next stage, it is formed into a coil or pile by
tion; and
FIGURE 2 is a plan view corresponding to FIG
means of a revolving baseplate and the resultant pile is 15
URE 1.
shaped and supported by a steel guard or guide which
Sliver 1 is shown being drafted by a pair of rollers 2
is open on the side away from the machine. This is
and 3 from a faller bed 4 after which it passes through
usually half-circular, but may comprise a pair of surfaces
a pair of delivery rollers 5 and 6 and then descends on
arranged in the form of an open-ended V. The pile of
sliver which is formed is frequently quite heavy; for ex 20 to a rotary baseplate 7. This is mounted on a bearing
8 and is located in a recess 9 in the floor. The drive
ample, the piles of sliver produced from a Goods Ma
to this baseplate is omitted for simplicity. The base
chine processing bast ?bres may weigh approximately 300
plate 7 has a roughened surface constituted by a diamond
lbs. In a typical example, a pile of this size must be
pattern as shown in FIGURE 2 at 1-0. This prevents
removed from the machine approximately every four min
25 the sliver slipping on the baseplate and enables the sliver
utes.
to be coiled into a pile 11 as shown in FIGURE 1.
For this purpose the normal practice is to stop the
During its formation the pile is shaped and supported
machine and then for the operator to slide the pile of
by a half-circular guide 15 and behind this guide is
sliver manually off the baseplate by means of a pair of
located a power operated ram constituted by a pair of
hooks. The ?oor may be made smooth to facilitate the
parallel rods 16. These slide in guides 17 and 18 and
sliding of the pile of sliver, but the surface of the base
are operated by a pressure cylinder 19 having a piston
plate must be rough in order to provide the necessary
?tted with a piston rod 21 connected to a crosshead 22
rotary drive to the pile of sliver, so that considerable
secured between the rods 16. When pressure, which
effort is involved in removing the pile from the plate.
may be either pneumatic or hydraulic, is supplied to the
According to the present invention, a ram located be
hind the guide is power operated so as to project beyond ' cylinder 19, the rods 16 are caused to project through
openings 25 in the guide 15 and thus to engage the pile
the guide and thus doif a pile of sliver on the baseplate,
of sliver 11. The thrust exerted by the rods moves the
after which it is retracted again. In this way the greater
pile into the position shown in dotted lines at 11' in
part of the work involved, namely the removal of the
FIGURE 1 and since the ?oor adjacent the baseplate 7
pile from the plate, is carried out under power and it is
then only necessary for the operator to slide the dotted 4.0 is quite smooth the pile may then he slid away from the
machine by the operator without di?iculty. The fact
pile of sliver over the ?oor which requires considerably
that the pile is engaged at two points on opposite sides
less effort than is necessary for removing it from the base
of its centre line by the rod 16 effectively prevents it
plate. Moreover, it is possible for the pile of sliver to
be doffed without the necessity for stopping the machine.
from rotating during the do?lng action.
The operation of the rods 16 is initiated by a valve
shown diagrammatically at 26. This connects pressure
?uid from a source 27 by way of a pipe 28 to the rear
the do?'ing mechanism. Alternatively, the operation
end of the cylinder 19. This forces the rods to the left
may occur automatically when the pile reaches a prede
termined size. After do?ing the free end of the sliver is 50 as already described and when they reach the limit of
their travel, an adjustable bolt 29' on the crosshead 22
fed downwardly into contact with the rotary baseplate
engages a valve 30 mounted on the guide 17. This
and the formation of the next pile continues without in
switches the pressure fluid from the rear end of the
terruption.
cylinder by way of a pipe 31 to the front end of the
Preferably, the ram comprises a pair of parallel rods
Thus the operator may break the sliver at a point just
before it reaches the pile and then operate a control for
spaced apart horizontally by a distance approximately
equal to the radius of the baseplate.
The use of a pair
of spaced parallel rods has the advantage that they tend
, cylinder and thus causes the rods 16 to be retracted
once again. When the piston has returned to its re
tracted position, a valve 32 is operated which cuts off
the supply of pressure ?uid and the operation is com
to prevent the pile of sliver from rotating while it is
plete.
being dotted. Moreover, on withdrawal they do not in
Since the operation is carried out under power, it is
terfere with the free end of the sliver ‘falling on to the
not necessary to stop the feed of sliver before do?ing the
baseplate to start the formation of the next pile, nor do
pile 11. Before operating the valve 26, however, the
they carry any ?bre backwards with them which would
operator breaks the sliver just forward of the delivery
cause dif?culties in the building of the next pile.
rollers and the do?‘ing of the pile 11 taking place while
Most simply, the rods are operated by a pressure cylin
der having a piston connected to a crosshead secured be 6 C21 the baseplate 7 continues to rotate and the sliver 1 con
tinues to be fed forwardly. The end of the sliver 1
tween the rods. This pressure cylinder may be con
descends
between the spaced rods 16 and when these
trolled either by compressed air or by hydraulic ?uid.
are retracted again they do not interfere with the sliver
As an alternative to the use of a pressure cylinder, how
in any way which immediately starts to be coiled by the
ever, the operation may be carried out, for example, by
rotation
of the baseplate 7 and thus to form the next pile.
means of a crank, rack and pinion or other mechanical 70 I claim:
device.
1. Apparatus for coiling textile slivers into a general
If the operation of the rods is controlled by the opera
ly cylindrical pile, comprising: a rotary baseplate; a
>
W
guide for shaping and supporting a pile of sliver on said
baseplate; a ram located behind the guide; and power
operated means for moving said ram across said base
plate so as to project beyond the guide and doif the pile
of sliver from the baseplate.
2. Apparatus according to claim 1, in which said ram
comprises a pair of parallel rods spaced apart horizontal
1y by a distance approximately equal to the radius of said
baseplate.
4
eter than said rods so that loose ?bers are stripped from
said rods on their return stroke.
6. Apparatus as de?ned by claim 1 in which said ram
is positioned to travel closely above said rotary base
plate.
7. Apparatus for coiling textile slivers into a substan
tially cylindrical pile comprising: a rotary baseplate; a
semi-circular guide positioned adjacent and extending
upwardly from said baseplate for shaping and supporting
3. Apparatus as de?ned by claim 2 in which said 10 a pile of sliver on said baseplate; a pair of spaced paral
lel horizontal rods slidingly supported adjacent said base
power operated means comprises a pressure operated
plate for movement immediately above and across said
cylinder and piston, and a crosshead connected to said
baseplate; a power operated cylinder and piston; a cross
piston and said rods.
head connected to said piston and said rods; and valve
4. Apparatus according to claim 3, including a man
ually controlled valve which admits pressure ?uid to 15 means for actuating said cylinder and piston to move
said rods across said bsaeplate to doif a roll of sliver
said cylinder to initiate operation of said rods; a second
therefrom.
valve controlled by movement of said rods to the limit
of their travel which diverts pressure ?uid to the other
References Cited in the ?le of this patent
end of said cylinder to retract said rods; and a third
UNITED STATES PATENTS
valve controlled by the return of said rods to their re 20
tracted position which cuts off the supply of pressure
2,934,221
Tonna ______________ __ Apr. 26, 1960
?uid.
FOREIGN PATENTS
5. Apparatus as de?ned by claim 4 in which said guide
includes a pair of openings of only slightly larger diam
412,893
Great Britain __________ __ July 5, 1934
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