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Патент USA US3070857

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Jan. 1, 1963
B. SCHWAB
3,070,847
APPARATUS FOR REGULATING THE DENSITY OF COTTON FED
TO CLEANING AND OPENING MACHINES IN
COTTON AND FIBRE SPINNING
Filed March 16, 1960
INVENTQ‘?
Bruno ?c/zwab
United States Patent ()??ce
1
3,070,847
Patented Jan. I, 1963
2
ing rollers of known kind. All that is needed is so to
adjust the spring that the pressure resulting from the pre
determined density of ?bre suf?ces to interrupt the action
of the shaking roller upon the vibratory wall. When
3,070,347
APPARATUS FDR REGULATING THE DENSITY
0F COTTQN FED T0 CLEANING AND OPENING
MACHINES IN COTTQN AND FIBRE SPINNING 5 the density falls the counter pressure against the spring
Bruno Schwab, Dulrnen, Westphalia, Germany, assignor
falls, and the shaking roller again begins to act on the
to Hergeth KG. Maschinenfabrik u. Apparatebau,
Dulmen, Westphalia, Germany, a ?rm
Filed Mar. 16, 1960, Ser. No. 15,445
5 Claims. (Cl. 19-204)
side wall. It is this continuous counterplay between pres
sure and counter pressure that ensures constancy of
10
In order that cotton and like ?bre may be supplied in
flock form to the feed rolls of opening and cleaning ma
chines, especially of the beater type, at a uniform density,
it has been proposed to use high ?lling shafts and to im
density of the lap in the direction of running.
The pressure spring can be adjusted by hand; for ex
ample, by adjusting its abutment by a screw. The posi
tion of the abutment is then an indication of the density
of the lap, which can be read upon a scale graduated as
desired.
part a shaking or jogging movement to the ?brous ma 15
,In this manner the loose ?bre ?ock supplied in a high
terial. In a ?lling shaft at least half a metre high the
?lling shaft equipped with shaking means is formed into
?ock is already compacted to a certain extent by its own
an even lap of predetermined density which shows no
weight by the time it reaches the bottom of the shaft
variations of density in the direction of travel.
where it is taken off by a pair of rollers. To prevent
In the cotton and ?bre industry where effort is more
hollows forming, or denser or less dense patches of ?bre, 20 and more directed to shortening the process of spinning,
a shaking movement is imparted preferably by setting
it is of extraordinary commercial importance that right
the front or back wall of the shaft, or both, in rapid
at the beginning of the spinning process a lap of ?bre
vibration. This reduces the friction of the ?bre on the
should be supplied which does not vary in weight, small
side walls of the shaft, and of the flocks one upon the
length by small length.
other, so that all hollow spaces are ?lled up and a uni— 25
Control of the shaking action in relation to a prede
termined density of lap may also be effected, for exam
over the whole working width.
ple, by bringing the shaking roller to a standstill as soon
There is a defect of such means for obtaining uniform
as the predetermined density is reached. For that pur
density of ?ock over the whole working width which
pose it is convenient to provide a spring-loaded swinging
renders it impossible to set or maintain any determined 30 plate at the bottom of the ?lling shaft, the pressure of
degree of compacting. The ?lling shafts with vibrating
the dense ?bre acting against the spring. If, for ex
devices hitherto known do not ‘make it possible to suit
ample, the shaking roller is electrically driven the small
the intensity of shaking to the degree to which the ?ock
movement of the swinging plate may operate, say, a mer
has already been compacted. Therefore, the lap becomes
cury switch to complete or break the circuit of the driving
further compacted when the shaft is ?lled or the supply 35 motor. The spring may be set for a predetermined
to the beater is temporarily interrupted. Thus, the lap
density, and the density may be indicated, as described
varies in density in the direction of its length, and may
with reference to the ?rst example.
in places be so ?rmly compacted that the feed regulators
Two examples of construction of the invention are
of the beater no longer operate with precision.
illustrated in the accompanying drawings.
This defect in ?lling shafts with shaking means is the 40
FIG. 1 is a diagrammatic section through a ?lling shaft
more striking since in other constructions of ?lling shaft
with a shaking motion controlled according to the inven
formly dense lap of ?bre is supplied to the take-up rolls
having slanting walls made up of conveyor rolls or con
tion, and
veyor belts it has been proposed so to ‘adjust the friction
FIG. 2 is a diagrammatic section of another example
of the invention.
between the conveyor means and the ?bre that feed of
the ?bre to the take-off rolls is effective only up to a pre 45
In both ?gures, the numeral 1 designates the ?lling
determined density.
4
This notion is not applicable to ?lling shafts with shak
ing means because there are no conveyor belts or rollers
shaft, at least half a metre high into which the ?brous
?ock 2 is fed in known manner. Below the shaft the
?bre, formed into a lap of uniform density, is taken off
by rollers 3, 3’ and carried away on a conveyor 17 for
for compacting. Moreover, experience has shown that
this method does not ahcieve lengthwise uniformity of 50 further treatment, for example, in a beater (not shown).
density, because each time the machine is stopped and
FIG. 1 shows one side wall 4 of the ?lling shaft vi
started the friction varies from static friction to kinetic
friction, so the density varies to and fro between two
brated by a shaking roller 5 of known construction, the
Wall 4 and its arm 6 resting upon the shaking roller 5
extremes.
pivotally supported on the rod 7 with the arm 6. Spring
The object of the present invention is a method of 55 8 engages the wall 4 and indirectly presses the arm 6
and means for regulating the ‘degree of compacting of
against the roller. The more densely the material 2 in
the ?bre in a ?lling shaft equipped with shaking means.
the ?lling shaft is shaken together the greater will be its
Its distinguishing feature is that the intensity of the shak
pressure against the side wall 4 and spring 8. By means
ing is made inversely dependent on the density already
of a hand-wheel 9 on a threaded spindle 10 the abutment
reached, so that the shaking movement and the density
stand in a reciprocal relation. The shaking is diminished
as the density increases, and ceases when the desired
plate 11 to which the spring is attached can be adjusted,
and with it the pressure of the spring. If the pressure
exerted by the dense ?bre in the direction of the arrow X‘
is suf?cient to overcome the tension of the spring 8, the
density is reached; conversely, it begins again so soon
shaking movement will ?rst diminish in amplitude, and
as the density falls below an adjustable determined value.
In this fashion the ?brous material, already shaken into 65 ?nally will cease when arm 6 no longer touches the
shaking roller ‘5. If this counter-pressure relaxes, the
uniform density across the working width, is also freed
shaking movement begins afresh, ?rst weakly, and then,
of variations in density in the longitudinal direction of
travel.
if the counter-pressure still decreases, with full intensity.
This constant counterplay of ?bre pressure and spring
The density of the material at the bottom of the ?lling
shaft acts in opposition to pressure means, for example, 70 pressure makes the density very nearly constant in the
a spring, a weight, or the like, by which one or both
direction of travel. Adjustment of the spring pressure by
vibratory side walls of the shaft are pressed against shak
the handle 9 determines the density. An indicator is con
3,070,847
3
nected with the plate 11 which shows the density on a
scale graduated as desired.
A pointer 12 on the hand
Xheel 9 makes possible more exact reading on a graduated
18C.
in FIG. 2 the side wall 4 of the ?lling shaft 1 is shaken
in known manner by the shaking roller 5. An independ
ently pivoted swinging plate 13 that pivots over the pin
18 forms a part of the lower end of the wall 4 and is
under pressure from spring 8 compressed between it and
the abutment plate 11 which is adjustable by the hand
wheel 9.
The shaking roller 5 has its own driving motor
14. The swinging plate 13 is connected through the arm
15 with the motor switch 16.
As soon as the counter
4
thereof, and tensioning means associated with the vi
brating side wall to control vibration of the side wall and
to render the vibrating means active with respect to the
vibrating side wall.
3. Apparatus for regulating the density of cotton and
like ?bres fed to opening and cleaning machines in cotton
and ?bre spinning, comprising a ?lling shaft having a vi
brating side wall to condense the ?bres, an arm extending
outwardly and downwardly from the upper end of the
vibrating sidewall to form a crotch for the pivotal mount
ing of the wall, means engageable with the arm to effect
the vibration of the side wall and variable tensioning
means engageable with the lower end of the side wall
automatically controlled by the density of the ?bres for
pressure due to the density of the ?bre in the direction
of the arrow X overcomes the pressure of the spring 8, 15 controlling vibration of the side wall.
4. Apparatus as in claim 1 wherein a separate pivotally
the motor 14- is switched off. It will be understood that
mounted wall section is located below the vibrating side
wall 4 will be moved only slightly out of its normal posi
wall, electrical means including a switch for controlling
tion by pressure of the ?brous ?ock thereon, because the
operation of the vibrating means and a part of the sepa
end 13 of the pivoted plate will be moved by the ?ock
against the pressure of the spring 8 to operate the switch 20 rate pivotally mounted section of the side wall being mov
able into engagement with the switch in the presence of
16 and cut off the motor 14F and bring the shaking roller
increased density in the ?bres to render the electrical
5 to rest. Therefore, real excess pressure of the ?brous
means inoperative.
?ock acts on the plate 13 to control the shaking of the
5. Apparatus for regulating the density of cotton and
?ock.
The shaking roller 5 may be replaced by any other ma 25 likep?bres fed to opening and cleaning machines in cotton
and ?bre spinning, comprising a ?lling shaft having a vi
chine element suitable for the purpose. In place of the
brating side wall to condense the ?bres, means associated
electrical drive there can be some form of mechanical
with the side wall to effect vibration thereof, a pivotally
drive that is easily put into and out of action.
mounted angular plate at the lower end of the ?lling shaft
What is claimed is:
in line with the vibrating side wall and having one end
1. Apparatus for regulating the density of cotton and
thereof contacted by the material passing through the
like ?bres fed to opening and cleaning machines in cotton
?lling shaft, electrical means including a switch for con
and ?bre spinning, comprising a ?lling shaft having a vi
trolling operation of the vibrating means, tensioning means
brating side wall to condense the ?bres, means associated
associated with the angular plate with the latter movable
with the side wall to effect vibration thereof and tensioning
means associated with the lower end of the vibrating side » by pressure thereon of ?bres of suf?ciently increased
density to create an excess of pressure on the angular
wall to render the vibrating side wall active until the
desired density of the ?bres passing through the ?lling
plate thereby pivoting said plate with a part of the plate
shaft is attained.
2. Apparatus for regulating the density of cotton and
like ?bres fed to opening and cleaning machines in cotton 40
and ?bre spinning, comprising a ?lling shaft having a vi
brating side wall to condense the ?bres, means for vibrat
ing the side wall including an arm extending from the side
movable into contact with the switch to render the elec
trical means inoperative.
wall and means engaging the arm to effect vibration
References Cited in the ?le of this patent
FOREIGN PATENTS
953,587
Germany ____________ __ Dec. 6, 1956
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