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Патент USA US3030976

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April 24, 1962'
R. LANORE
'
3,030,966
FILLER FORMING MECHANISM
Filed Dec. 11, 1957
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5 Sheets-Sheet 1
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'lNl/ENTOR
BY
Zwdkjaw
ATTOR/VE Y
April 24, 1962
R. LANORE
3,030,966 ‘
FILLER FORMING MECHANISM
Filed Dec. 11, 1957
5 Sheets-Sheet 2
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A TTORNE y
April 24, 1962
R. LANORE
3,030,966
FILLER FORMING MECHANISM
Filed Dec. 11, 1957
5 Sheets-Sheet 3
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BY
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AmRNEY
April 24, 1962
R. LANORE
3,030,966
FILLER FORMING MECHANISM
Filed Dec. 11, 1957
5 Sheets-Sheet 4
April 24, 1962
R. LANORE
3,030,966
FILLER FORMING MECHANISM
Filed Dec. 11, 1957
5 Sheets-Sheet 5
INVENTOR
wa‘éw
Qfeiqbmélw
3/111”)
ATTORNEY
United States Patent
ice
‘it41.
3,930,966
Patented Apr. 24, 1962
2
FIGURE 6‘ is a sectional view taken along the line
3,030,966
Raymond Lanorc, Paris, France, assignor to Usines
VI——VI, FIGURE 5.
FILLER FORMING MECHANISM
7
Referring ?rst to FIGURE 1, the apparatus comprises
a hopper 1 for out tobacco, a conveyor belt 2 to support
tobacco in the hopper, and a carded roller 3 towards
Decou?e S.A., Paris, France, a French company
Filed Dec. 11, 1957, Ser. No. 702,104
Claims priority, application France Dec. 18, 1956
which tobacco is urged by the conveyor belt 2, which
move in the direction shown by the arrow. “A brushing
or levelling roller 4 is located adjacent the roller 3 and
This invention concerns improvements in or relating
rotates in the same direction, as indicated by the arrows
to apparatus for forming a continuous tobacco filler, for
on the rollers 3 and 4. A picker roller 5 is arranged
10
example in a cigarette-making machine.
close to the roller 3 and is rotatable so as to pick to
One di?iculty that arises in the formation of a con
bacco from the carding of the roller 3 and distribute it
tinuous tobacco ?ller by known methods is the tendency
on an endless conveyor belt 6. The conveyor 6 is ar
for the filler to contain varying quantities of tobacco
ranged to move in the direction of the arrow at a speed
‘
9 Claims. (Cl. 131-84)
along its length. In continuous rod cigarette-making
machines it is usual to shower cut tobacco on to a travel
ling conveyor so as to form ‘a loose tobacco stream which
is subsequently compressed laterally and enclosed in a
15
of 4 feet per second.
Beyond the end of the upper run of the conveyor 6 is
a passage 8 which extends along the whole width of the
conveyor belt 6, see FIGURE 2. The passage 8 com
continuous web of cigarette paper to form a continuous
cigarette rod. The loose stream formed on the con
prises opposed walls, spaced 10 mm. apart, whose op
posed
surfaces are slippery to reduce friction. These
veyor is usually irregular in that the quantity of tobacco 20 walls extend upwardly and their upper extremities are
varies from point to point along its length, and these ir
regularities are generally also found, to a greater or less
connected to a pair of side guides or walls which form a
channel 9, as best seen in FIGURE 4. The walls of the
extent, in the ?ller of the wrapped cigarette rod, in spite
channel 9 have slippery opposed surfaces, the upper parts
of various means which have been used to improve the 25 of which are convergent (considered in a downward di
uniformity of the tobacco ?ller before it is enclosed in
rection), each being at an angle of 10° to the vertical.
the paper wrapper. The present invention is directed to
the problem of forming a tobacco filler of improved
A flat endless conveyor belt 10, which is 10 mm. wide,
is arranged to move through the upper part of the chan
uniformity.
nel 9, and passes wheels or rollers 11, 12 and 13 (see
For this purpose the present invention provides in a
30 FIGURE 2) of which the roller 11 drives the belt. The
tobacco manipulating machine such as a cigarette-making
conveyor belt 10 is perforated, being provided with small
machine, apparatus whereby a tobacco stream is fed
holes each of a diameter of 0.8 to 1.2 mm, About 40
lengthwise by an air pervious conveyor, and including a
such holes per square centimetre of the entire surface
trimming device, located downstream from the zone
of the belt are provided.
wherein the formation of the tobacco stream is effected
The belt 10 is held within the channel 9 by the lower
and completed, to remove surplus tobacco from the 35 surfaces of a pair of opposed elements 14, which over
stream, and suction means to apply air pressure to the
hang the walls of the channel 9 by about 1 mm. on each
tobacco in the stream by drawing air through the stream
side, thus forming shoulders which guide the belt through
and through the conveyor, while the latter is carrying
the channel.
the stream from the said zone toward the trimming de 40 The channel 9 and conveyor belt 16 are slightly in
vice.
clined downwardly in the direction of movement of the
The invention also provides trimming means to remove
band. This inclination may for example be at an angle
surplus tobacco from a tobacco stream, comprising a pair
of 6° to 10° to the horizontal.
of rotatable elements, extending from opposite sides of
A suction chamber 15 communicates with the perfo
the stream toward each other and into the path of tobacco
rated
conveyor belt 10 by way of a narrow chamber 16
in the stream, to engage tobacco at a desired level and 45 formed by the opposed elements 14. The chamber 15
hold it controlled while a third movable element removes
further communicates with a pipe 17, FIGURES 1 and
tobacco projecting beyond the edges of the rotatable ele
2, which extends to the inlet of a fan (not shown) ar
ments, so as to complete the trimming operation.
ranged to draw air through the pipe 17 from the cham
A further feature of the invention is the provision of
bers 15 and 15 and thus through the perforated conveyor
50
belt 10.
means whereby the trimmed filler is carried by the suc
tion conveyor into engagement with a cigarette paper
The passage v8 extends downwardly below the con
web to which the ?ller is to be transferred, so that the
veyor belt 6, and communicates with a pipe 21 which ex
?ller is engaged simultaneously by the suction conveyor
tends to the output side of the fan referred to above, so
and the paper web during its transfer to the latter.
that air is blown through the pipe 21 into and through
55
The invention further provides means whereby the
the passage 8. As illustrated in FIGURE 2, the air
trimming device may be raised and lowered in order to
sucked' through the conveyor 10 between the points
change the distance of the discs from the conveyor band.
marked 18 and 19 in the ?gure reaches the conveyor
Apparatus in accordance with the invention, for form
from the passage 8, while between the points marked 19
and 20 the air is drawn through the channel 9, whose
ing a continuous tobacco ?ller in a cigarette-making ma
60
opposed sides are extended downwardly by guide plates
chine, will now be described by way of example with
reference to the accompanying drawings, in which:
FIGURE 1 is a sectional end elevation diagrammat
22.
ically illustrating apparatus according to the invention;
The arrangement of the fan, the pipe 17, and the suc
tion chambers 15 and 16, is such that a negative pres
V-V, FIGURE 2; and
spindles 24 driven by pinions 25. The discs are arranged
sure of about 800 to 900 mm. of water is maintained in
FIGURE 2 is a sectional front elevation;
65 the chamber 16.
FIGURE 3 is a plan view of part of the apparatus
A trimming device for trimming the tobacco ?ller is
shown in FIGURES 1 and 2;
provided beneath the channel 9 at a position beyond the
FIGURE 4 is a sectional view taken along the line
passage 8, that is, between the points marked 19 and 20
IV—IV, FIGURE 2;
in FIGURE 2. The trimming device comprises a pair of
FIGURE 5 is a sectional view taken along the line 70 peripherally chamfered discs 23 mounted on two rotating
3,030,966
ll
3
to be rotated in opposite directions as indicated in FIG
?ller, and is preferably approximately equal to the depth
URE 3, with a peripheral speed slightly greater than the
of the ?ller, so that the latter can be transferred from the
linear speed of the conveyor belt 10. The two discs 23
conveyor to the paper without any substantial drop and
have their bottom surfaces disposed in a single plane paral
thus with little disturbance.
lel to the plane of the ?at conveyor belt 10. Although in 5
A shoe ‘44- is arranged between the tongue 43 and the
roller 11 and has an edge just clear of the conveyor 10
the drawings the discs are shown apparently in contact,
their opposed edges are, at the point where they are
to prevent tobacco being carried around the roller 11 by
closest to each other, separated by a distance of 0.1 to 0.2
the conveyor 10.
mm.
The belt 41 is supported in a trough 141 which shapes
Beneath the trimming device is a paddle-wheel device
it and the paper web 42 into arcuate form in the usual
26 for removing tobacco which is separated from the filler
way.
by the discs 23. This comprises a hub 27 provided with
The operation of the apparatus is as follows:
Tobacco is fed from the hopper 1 by the carded roller
four radial blades 28, each about 8 mm. wide. The hub
is mounted on the end of a spindle 29 which is arranged
3, on which it forms a carpet or layer from which surplus
to rotate at high speed and is inclined to the direction of
tobacco is brushed back by the brushing roller 4. The
movement of the conveyor belt 10.
The blades 28 are
picker roller 5, rotating at high speed, picks tobacco from
adjusted so that their extreme edges rub against the bottom
the carding of the roller 3 and throws it on to the con
surface of both the disc 23 at the region where the edges
veyor 6, which as stated above is moving at a speed of
of the two discs approach closest to each other, and thus
4 feet per second. This speed is high relative to the
engage and remove tobacco which is beneath the discs, 20 peripheral speed of the carded roller 3, and the tobacco
completing the separation of that tobacco from the tobac
is thus spread or distributed over the conveyor 6 fairly
co that passes above the discs.
sparsely and in a somewhat separated condition.
An endless conveyor 30 extends beneath the rotating
At the point 7, FIGURE 1, the conveyor 6 passes over
paddle-wheel 26 to receive tobacco removed and thrown
a guide roller and, due to the speed of the band 6, the
downwardly by the blades 28. The conveyor 30 is ar 25 tobacco is projected towards the passage 8. The distance
ranged to convey such tobacco towards, and deposit it
from the point 7 (that is, the end of the conveying surface
upon, a further conveyor 31 (FIGURE 1) which in turn
of the conveyor 6) to the passage 8 is, in the example
deposits the tobacco on the conveyor band 2, which re
illustrated, about 6 inches.
turns it to the hopper 1.
The passage 8 is so ‘arranged and dimensioned in rela
Means are provided for adjusting the position of the 30 tion to the suction fan and the various air conduits that
trimming device, in order to alter the level at which
a stream of air ?ows upwardly through the passage 8 at
tobacco is separated from the ?ller carried by the con
a velocity of 30 feet per second. As stated above, the
opposed walls of the passage 8 are spaced 10 mm. apart.
veyor 10. A frame 32 (FIGURES 5 and 6) supports
bearings 33 for the spindles 24 of the discs 23, and also
This arrangement, whereby air flows at a speed of 30
the bearing 34 for the shaft 29 of the paddle-wheel 26.
feet per second through a 10 mm. passage, is found to
The frame 32 has a slide 36 which is slidable in a guide
give good results. Both the air speed and the dimensions
way 136 in a stationary frame 38. A tapped member 37 is
of the passage may be varied if desired, but in any such
carried by the slide 36, and a screw 39 which extends
case it is found preferable that the relationship between
through the frame 38 is threaded through the member 37
the air speed in the passage, and the spacing between the
and can be rotated by a knob 40 in order to raise or lower 40 passage walls, should be governed by the formula
the frame 32, and therefore the discs 23 and the paddle
wheel 26. The latter can move up and down with the
1f'rsame 32 because its spindle 29 includes a universal joint
300
I“?
where V=velocity of air in feet per second, and T=the
In the construction illustrated, the minimum distance 45 distance between the walls of the passage (or in other
words the depth of the stream of air) in millimetres.
of the edges of the discs 23 from the conveyor belt 10 is
As mentioned above, the tobacco is distributed over the
9 mm., and this distance can if required be increased, by
conveyor 6 in a somewhat separated condition—that is to
lowering the frame 32, by any suitable amount.
say, the individual shreds or particles of tobacco are to
In practice it is found that this distance can be increased
from 9 mm. to 12 mm. with satisfactory results. The 50 a considerable extent separated from one another by the
picking operation and are distributed over the surface of
minimum distance of 9 mm. is of course determined by
the conveyor 6 in a similar condition owing to the high
the walls of the channel 9. If it is desired to position the
speed of the conveyor 6 relative to that of the carded
discs 23 still closer to the conveyor 10, this can be done
by making the channel less deep, or in other words by
roller 3.
55
These particles of tobacco, moving at a speed of 4
making the channel walls narrower.
feet per second, are projected into the passage 8 and
Referring now to FIGURE 2, an endless conveyor belt
thus immediately subjected to the action of a stream of
41 is arranged to carry a continuous web 42 of cigarette
air moving upwardly through the passage at a speed of 30
paper through rod-forming mechanism, including a tongue
feet per second. Thus successive particles of tobacco are
43, by which the tobacco ?ller is enclosed in the cigarette
paper web to form a continuous cigarette rod. The belt 60 suddenly and violently accelerated by the rapid upward
current of air. This sudden acceleration greatly increases
41 and cigarette-paper web 42 extend beneath part of the
the separation of particles from one another, and tends
conveyor 10, and move at the same speed as the conveyor
to space individual particles apart from one another to a
10 and in the same general direction, although in the
considerable extent, resulting in a rapid upward ?ow of
construction shown, the belt 41 runs horizontally while
the conveyor 10 is slightly inclined downwardly in its 65 separated particles most of which are spaced well apart
from each other.
direction of movement.
These particles are thus carried at high speed up into the
The suction chamber 16 extends to the point marked
channel 9 Where they accumulate on the underside of the
20, FIGURE 2, and beyond that point the conveyor 10
conveyor 10, and on each other, to form a ?ller. The
is no longer in communication with the source of suction.
The paper web 42 is led in beneath the conveyor 10 just 70 particles are held to the conveyor 10 by suction acting
through the small holes in the conveyor.
before the latter reaches the point 20, and is thus in a
Thus by the device disclosed a tobacco ?ller is built
position to receive and support the tobacco ?ller when this
up of substantially uniform density. The expression “sub
is no longer held by suction against the conveyor 10. The
stantially uniform density” must not, however, be under
spacing between the paper web 42 and the conveyor 10
is at no point greatly in excess of the depth of the tobacco 75 stood as meaning necessarily a density which is uniform
3,030,966
6
throughout the depth of the ?ller. The forces acting on
ticles upwardly toward said conveyor, means, including
the particles of tobacco at different depths or levels of
the tiller, as the latter is built up in the channel 9, may
a suction device located above said conveyor, to .cause
air to ?ow upwardly through the said conveyor whereby
be affected by the changing quantity of tobacco held
the said tobacco is held on the underside of the conveyor
and forms a ?ller thereon, a trimming device comprising
against the perforated conveyor, in such a way as to pro
duce a greater density of tobacco at one level than at
a pair of cooperating rotating trimming discs disposed
downstream from the zone wherein said ?ller is formed
another.‘ The density at any one level is, however,
thought to be substantially the same along the length of
the ?ller (excluding any parts of the ?ller whose density
and beneath the conveyor and a rotatable element be
neath the discs arranged in cooperation with the discs to
may be deliberately increased by some means other than 10 trim the said ?ller to a desired cross-sectional size by re
the impact of tobacco under the in?uence of the air
moving therefrom surplus tobacco with projects beneath
stream).
the discs, means disposed beneath said trimming device
to receive surplus tobacco falling therefrom, and con
The walls of the channel 9 being convergent (considered
in a direction away from the conveyor 10) tend to give
veyor means to convey said surplus tobacco to the hopper.
some support to the ?ller in addition to that given by 15
2. In a continuous rod cigarette-making machine hav
suction.
'
ing a tobacco hopper, apparatus for forming a continuous
As stated above, the walls of the channel 9 are slip
cigarette rod, comprising an air-pervious conveyor ar
pery, and consequently they offer low resistance to the
ranged to move lengthwise, means to feed tobacco par
tobacco ?ller formed in the channel 9. The effect, there
ticles toward the underside of said conveyor to form a
fore, is that the ?ller is conveyed forward by the con
?ller thereon, a suction chamber above said conveyor,
veyor and subjected to the minimum of disturbance
means to draw air upwardly through said conveyor and
along its length.
said suction chamber to hold said tobacco ?ller against
Tobacco is fed to the passage 8 in sui?cient quantity,
the conveyor, a trimming device comprising a pair of
in relation to the speed of the conveyor 10, to enable a
cooperating rotating discs disposed downstream from the
?ller to be built up on the conveyor of greater depth than 25 zone wherein said ?ller is formed and beneath the con
is required in the ?nal ?ller. The ?ller so formed may
veyor and a rotatable element beneath the discs arranged
vary in depth from point to point along its length, but
in cooperation with the discs to trim the said ?ller to a de
its minimum depth should, as far as is practicable, be
sired cross-sectional size by removing therefrom surplus
at least equal to the distance between the conveyor 10
tobacco which projects beneath the discs while the ?ller
and the discs 23 of the trimming device which removes
is suctionally controlled by the conveyor, a further con
excess tobacco and thereby trims the ?ller to a uniform
.veyor to convey a cigarette paper web beneath and past
depth. Since the width of the ?ller is controlled by the
a part of said air pervious conveyor and said suction
side walls of the channel 9, it will be seen that the ?ller
chamber at a position beyond the said trimming device
after trimming, being of substantially uniform density
and in the same general direction as that in which the
along its length (in the sense explained above) and now 35 said air pervious conveyor moves, said further conveyor
having a substantially uniform cross-sectional size, is
capable of being compressed to cigarette-rod size while
being spaced from said band by a distance substantially
equal to the depth of the trimmed ?ller, whereby the ?ller
is engaged simultaneously by the said air pervious con
maintaining to a very great extent the uniformity of its
density.
veyor and the paper web.
I
In the construction described, where a negative pres
sure of 800 to'9OQ mm. of water is maintained in the
chamber 16, and where air is blown at a velocity of 30
feet per second upwardly through the passage 8 whose
walls are 10 mm. apart, it is found that a ?ller of a
40
3. Apparatus as claimed in claim 1, wherein the said
rotatable element located beneath the said discs is ar
ranged to rotate about an axis transverse to the axesjof
rotation of said discs, and positioned so as to engage the
said discs while engaging tobacco projecting beyond the
particular type and moisture content can be formed on 45 said discs.
the conveyor 10 with a density equal to at least half the
4. Apparatus as claimed in claim 3, comprising a
density required in the ?nal ?ller-that is, when it has
been compressed beneath the tongue 43 and enclosed
mounting for said discs and said rotatable element, means
to raise or lower said mounting so as to raise or lower
in the paper web 42.
said discs and said rotatable element in unison, and drive
The amount of pressure exerted on the tobacco to com 50 means for said rotatable element, said drive means in
pact it to at least half the ?nal density will of course vary
cluding a coupling which permits upward and downward
movement of the rotatable member.
with the kind and condition of the tobacco being used.
Accordingly such pressure will vary according to immedi
5. In a continuous rod cigarette-making machine, ap
ate needs.
paratus for producing a continuous tobacco ?ller, com
The trimmed ?ller is carried past the point 20, FIG 55 prising tobacco feeding means to supply cut tobacco to
URE 2, beyond which it is no longer held to the conveyor
form a continuous endwise-moving stream of tobacco, at
trimming device downstream from the zone wherein the
it} by suction. By this time, however, it has been led
over the paper web 42 which is moving at the same
formation of the tobacco stream is effected and com
speed as the ?ller and is close enough to the conveyor 10
pleted, said trimming device being arranged to separate
to receive the ?ller from the conveyor without the ?ller 60 and remove surplus tobacco from the stream and thereby
being subjected to any substantial drop or other disturb
produce a ?ller, a perforated conveyor to carry the stream
ance. Thus the structure of the ?ller which has been
of tobacco lengthwise from said zone towards the said
formed and trimmed on the conveyor 10 is little disturbed
trimming device, and suction means to apply air pressure
during transfer to the paper web.
to the tobacco in the said stream by drawing air through
The ?nal compression of the ?ller under the tongue 43, 65 the stream and through the perforated conveyor, while
and its enclosure in the paper web 42 to form a continu
the latter is carrying the stream from the said zone to
ous wrapped cigarette rod which is severed to produce
wards the trimming device, said trimming device being
individual cigarettes, follows conventional practice and
located at a point at which the stream remains under
need not be described.
substantial compression resulting from the air pressure.
What I claim as my invention and desire to secure by 70
6. Apparatus for forming and trimming a tobacco
Letters Patent is:
stream in a tobacco manipulating machine, comprising
1. In a continuous rod cigarette-making machine hav
conveyor means to carry a tobacco stream lengthwise, a
ing a tobacco hopper, apparatus for forming a continu
ous tobacco ?ller, comprising an air-pervious conveyor
tobacco removing element mounted for rotation and
spaced from the conveyor means, a pair of opposed rotat
arranged to move lengthwise, means to feed tobacco par 75 able tobacco holding elements spaced from the conveyor
3,030,966
8
means and extending toward each other across the con
veyor means from opposite sides thereof and located be
tween the conveyor means and the said tobacco removing
element, tobacco feeding means arranged to supply to
bacco in suf?cient quantity for the formation of a to
bacco stream of such depth that some of the tobacco in
the stream extends beyond the said tobacco holding ele
ments and is engageable by the said tobacco removing
means arranged to feed to said channel at a predeter~
mined position a tobacco ?ller in the form of a stream
which has been built up to a greater mass per unit length
than that required in the ?nal ?ller, means to draw air
through the air pervious conveyor means and the said
tobacco stream so fed thereon, to effect and maintain by
air pressure a substantial compression of the said tobacco
stream in the channel, and trimming means spaced apart
from and downstream of the said position at which the
element, the said tobacco holding elements having edge
portions which while moving in the same general direction 10 said stream is fed to said channel, and being located at
as the stream engage the stream, the said tobacco re
a point at which the stream remains under substantial
moving element being arranged to move across said edge
compression resulting from the air pressure, to separate
and remove surplus tobacco from the said tobacco stream
and thereby to trim the stream to desired cross-sectional
portions which are engaging the stream, so as to remove
from the stream tobacco which projects beyond the said
edge portions while tobacco between the conveyor means
and the said tobacco holding elements is controlled by the
latter.
7. Apparatus for forming and trimming a tobacco
stream in a tobacco manipulating machine, comprising
conveyor means to carry a tobacco stream lengthwise,
side guides to maintain the stream within desired limits
of width, means to supply tobacco in sui?cient quantity
for the formation of a stream of greater mass per unit
size while it is substantially compressed.
9. A tobacco manipulating machine as claimed in claim
8, in which said trimming means comprises a pair of
relatively thin elements oppositely rotating about spaced
axes and whose perimeters comprise tobacco engaging
edges, a part of each element overlapping the air pervious
conveyor means at a desired distance therefrom, the said
elements being arranged for rotation in such directions
that portions of their perimeters between the said axes
length than is required in the ?nal product, trimming
move in the same general direction as the said tobacco
means to remove surplus tobacco from the stream, said 25 stream and engage and hold tobacco between said por
trimming means comprising a pair of rotatable elements
tions, and a movable element cooperating with said pair
of elements to engage and remove tobacco which is pro
spaced from the conveyor, said elements extending from
opposite sides of the stream toward each other and into
jecting beyond and held between the said elements, to
the path of tobacco in the stream, and having tobacco en- ,
complete the trimming operation.
gaging edges which while moving with the stream engage 30
tobacco between them at a desired level and hold it con
trolled during the trimming operation, and a third mov
able element cooperating with the said pair of elements,
and located at the opposite side of said elements from
the conveyor means, to remove tobacco engaged by and 35
projecting beyond the said edges so as to complete the
trimming operation.
8. A tobacco manipulating machine for making tobacco
smoking articles, comprising air pervious conveyor means
to feed a tobacco ?ller lengthwise, guide means associated
with said air pervious conveyor means to form therewith
a con?ning channel for the tobacco ?ller, tobacco feeding
References Cited in the ?le of this patent
UNITED STATES PATENTS
7,226
140,693
1,808,794
2,660,178
Wales ______________ __ Mar. 26,
Paul _________________ __ July 8,
Stelzer _______________ __ June 9,
Rault _______________ __ Nov. 24,
431,456
673,628
1,098,119
764,551
Germany _____________ __ July 7,
Germany _____________ __ Apr. 1,
France .; _________ __‘_____ Mar. 2,
Great Britain _________ __ Dec. 28,
1850
1873
1931
1953
FOREIGN PATENTS
1926
1939
1955
1956
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