U.S. patent number 3,731,451 [Application Number 05/149,177] was granted by the patent office on 1973-05-08 for filter plug forming and bagging machine.
This patent grant is currently assigned to Brown & Williamson Tobacco Corporation. Invention is credited to Wolfgang H. Grimm, John H. Sexstone.
United States Patent |
3,731,451 |
Sexstone , et al. |
May 8, 1973 |
FILTER PLUG FORMING AND BAGGING MACHINE
Abstract
Filter rods of predetermined length are placed in a hopper and
fed to a slitting drum. This drum contains flutes divided into four
groups, two of which are separated and their flutes are open
whereas the other two groups of flutes are closed. The rods are
received in the open flutes and there they are cut by a series of
rotary knives into equal sections to provide filter plugs. The
adjacent group of closed flutes in the path of rotary travel of the
drum permits the cut filter plugs to be directed to a bagging
station at which they are enclosed in a bag before the next group
of cut filter plugs are permitted to pass through to the bagging
station. As the cut filter plugs leave the slitting drum, they are
directed into a funnel which has associated therewith a gate. The
gate closes off the base of the funnel until the preceding group of
cut filter plugs are completely enclosed in a bag. Thereafter, the
hate is opened to permit the collected plugs to pass through to the
bagging station. At this station a web of heat sealable wrapping
material is fed into a tube former which forms the wrapping
material into a tube which extends vertically. A heat sealer seals
the overlapped marginal side edges of the tube of wrapping
material. A pair of opposed and reciprocal heat sealers operates to
heat seal and close the lower end of the tube at which the group of
cut plugs collect. When the predetermined number of cut filter
plugs is collected, the pair of reciprocal heat sealers are
reciprocated to heat seal and close the tube above the group of
collected plugs. This upper heat sealed zone is cut along an
intermediate section to thereby produce a severed bag of filter
plugs and at the same time provides the heat sealed and closed
lower end of the next bag to be formed. The filled and severed bags
are then permitted to drop and be collected in a suitable
receptacle.
Inventors: |
Sexstone; John H. (Middletown,
KY), Grimm; Wolfgang H. (Louisville, KY) |
Assignee: |
Brown & Williamson Tobacco
Corporation (Louisville, KY)
|
Family
ID: |
22529097 |
Appl.
No.: |
05/149,177 |
Filed: |
June 2, 1971 |
Current U.S.
Class: |
53/435; 53/53;
53/443; 53/451; 53/522; 53/552; 83/411.6 |
Current CPC
Class: |
B65B
57/12 (20130101); B65B 39/005 (20130101); A24C
5/35 (20130101); A24D 3/02 (20130101); B65B
51/306 (20130101); A24C 5/321 (20130101); B65B
9/207 (20130101); Y10T 83/656 (20150401) |
Current International
Class: |
A24D
3/00 (20060101); A24D 3/02 (20060101); A24C
5/32 (20060101); A24C 5/00 (20060101); A24C
5/35 (20060101); B65B 57/00 (20060101); B65B
57/12 (20060101); B65B 9/20 (20060101); B65B
9/10 (20060101); B65b 019/34 () |
Field of
Search: |
;53/23,123 ;83/411R |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: McGehee; Travis S.
Claims
What is claimed is:
1. A filter plug bagging machine for cutting a predetermined number
of plugs from filter rods and thereafter enclosing the plugs in a
bag, the machine comprising:
a hopper for receiving a plurality of filter rods;
a slitting drum having a predetermined number of open flutes for
receiving a corresponding number of rods from the hopper;
knife means associated with the drum for cutting the rods in the
flutes, into plugs;
gate means for momentarily stopping the travel of plugs cut by the
knife means until the preceding predetermined number of cut plugs
have been bagged;
funnel means for directing the cut plugs as a group to a bagging
station; and
a bag forming means at the bagging station for forming a bag of
selected material from the cut plugs.
2. The invention in accordance with claim 1 wherein the hopper
includes an upper entrance and a lower exit for receiving rods and
directing them to the slitting drum respectively, and a tray rack
means at the entrance end of the hopper for receiving and
supporting a tray containing filter rods.
3. The invention in accordance with claim 1 wherein the slitting
drum includes two series of open flutes separated by a
predetermined number of closed flutes, means for rotating the
slitting drum whereupon one revolution of said drum will produce
two groups of cut plugs.
4. The invention in accordance with claim 1 wherein the knife means
includes a series of rotatably driven knives that cooperate with
surfaces of the slitting drum, which cooperation results in cutting
of the plugs from the rods.
5. The invention in accordance with claim 1 wherein detector means
are associated with the slitting drum for detecting the absence of
a rod in one of the open flutes an thereafter generating a signal
in response to the open flute, and diverter means responsive to a
signal from the detector means for diverting the bag of cut plugs
that would be underfilled as a result of the empty flute.
6. The invention in accordance with claim 5 wherein the detector
means comprises a microswitch and the diverter means includes a
memory wheel system which receives the signal from the microswitch
which stores the signal, a diverter of the diverter means is
actuated by the memory system to divert the underfilled bag.
7. The invention in accordance with claim 1 wherein the means for
directing the cut plugs as a group includes a funnel and a gate
associated with the funnel for causing a number of the plugs to
collect in the funnel and means for opening the gate for permitting
the collected plugs to pass to the bagging station.
8. The invention in accordance with claim 1 wherein a stripper is
associated with the slitting drum to strip any cut plugs that may
stick to the drum after cutting by the knife means.
9. The invention in accordance with claim 1 wherein means are
provided for directing a web of the selected material to the
bagging station, means for forming the web into a tube, the means
for directing the cut plugs as a group acts to direct the group of
plugs into the tube, means for sealing adjacent side edges of the
web in forming the tube, means for sealing the lower end of the
tube such that the group of plugs collect adjacent the sealed lower
end of the tube and for sealing the tube above the group of
collected plugs to thereby form a bag containing the group of cut
plugs and means for severing the bag from the tube.
10. The invention in accordance with claim 9 wherein the means for
sealing the adjacent side edges and the lower end of the tube and
that portion of the tube above the collected plugs are heat sealing
means and the web of selected material is heat sealable.
11. A method of forming and bagging a predetermined number of
filter plugs for use in the manual formation of a filter tip
cigarette comprising the steps of:
providing the plurality of filter rods of predetermined length and
of selected filtering material;
feeding the filter rods;
intercepting the filter rods and carrying them to a cutting
station;
cutting the rods into filter plugs having a predetermined
length;
momentarily gating the path of travel and stopping the travel of
plugs that are cut until the preceding predetermined number of cut
filter plugs are bagged;
directing the cut filter plugs into an upper open end of a tube of
the selected wrapping material, the bottom end of said tube being
sealed;
collecting a predetermined number of the filter plugs in the tube
and thereafter sealing the tube above the collected filter plugs;
and
severing the enclosed filter plugs from the tube.
12. The invention in accordance with claim 11 wherein the filter
rods are intercepted and conveyed to the cutting station by a
fluted drum having a predetermined number of open flutes for
receiving filter rods to provide a predetermine number of filter
rods to be presented to the cutting station and thereby providing a
predetermined number of filter plugs to be bagged, detecting the
absence of a filter rod in a flute and transmitting a signal in
response to the absence of a filter rod in a flute, and diverting
the ultimately formed bag that is underfilled because of the
absence of a filter rod as detected in one of the flutes.
13. The invention in accordance with claim 11 including preventing
the jamming of filter rods at the entrance to the cutting
station.
14. The invention in accordance with claim 11 wherein the filter
plugs are intercepted and diverted to the bagging station as they
exit from the cutting station.
15. The invention in accordance with claim 11 wherein the cut
filter plugs are intercepted by a closed gate and thereafter
permitted to drop to the bagging station by opening the gate
following the enclosing of the preceding group of cut filter plugs
in a bag.
16. The invention in accordance with claim 11 including feeding a
web of the selected bagging material and directing it to a tube
forming station for purposes of forming said tube, heat sealing the
marginal side edges of the tube together and heat sealing the tube
below and above the selected group of filter plugs.
17. The invention in accordance with claim 16 wherein cutting the
heat sealed zone above the collected filter plugs at an
intermediate location to thereby form a completed bag of filter
plugs and at the same time form the sealed lower end of the tube
for the following bag to be produced.
Description
BACKGROUND OF THE INVENTION
This application relates to the manufacture of filter plugs
designed to be used in the manufacture of filter tip cigarettes by
manual techniques of the type disclosed in U.S. Pat. No. 3,491,768
granted Jan. 27, 1970. The machine of that patent is designed to
make a filter tip cigarette manually by inserting a filter plug and
a charge of tobacco simultaneously into a preformed tube. This tube
includes a tipping part which may assume the form of simulated cork
at the filter tip end of the manually made cigarette. This
preformed tube is commonly referred to as a "spill" in the trade.
In accordance with accepted marketing practice, the filter plugs
together with these spills are supplied to the smoking consumer as
part of a kit which may also include a supply of tobacco, a manual
cigarette making machine (as part of the initial purchase by the
consumer) and a number of packages for the manually made filter tip
cigarettes.
SUMMARY OF THE INVENTION
The present invention has as its prime objective an improved
apparatus and method for high speed production of bags containing a
predetermined number of filter plugs.
Another object is to provide an apparatus and method for
automatically cutting a predetermined number of filter plugs from a
number of filter rods and thereafter enclosing this predetermined
number of cut filter plugs in a bag.
A further object is to provide an apparatus and method of the
foregoing type through which a system is incorporated for assuring
against underfilled bags.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings
FIG. 1 is a diagrammatic perspective view of the filter plug
forming and bagging machine of this invention showing the filter
plugs cut from predetermined length filter rods and then funneled
into the open end of a tube of wrapping material and thereafter
enclosed in a heat sealed bag formed from this tube;
FIG. 2 is a front elevational view showing the filter plug forming
and bagging machine in more detail;
FIG. 3 is an end elevational view of the machine;
FIG. 4 is an enlarged sectional view taken along the line 4--4 of
FIG. 2;
FIG. 5 is a diagrammatic perspective view showing the drive of the
components of the machine;
FIG. 6 is an enlarged elevational view of the slitting drum and
associated plug cutting knives with certain parts broken away and
removed; and
FIG. 7 is a sectional view taken along the line 7--7 of FIG. 6.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
In the drawings, the filter plug forming and bagging machine
includes a hopper 10 which is adapted to receive and direct filter
rods, preferably 105mm in length, and direct them to a slitting
drum 12 which is suitably fluted to receive a predetermined number
of these rods and convey them while rotating to a cutting station
14 at which the rods are cut into five equal sections, each of
which are 21mm in length. The cut filter plugs are eventually
discharged from the drum as a result of the action of gravity and
fall into the upper open end of a funnel 16. A reciprocal gate 18
is associated with the lower end of this funnel and operates to
momentarily stop the downward travel of the filter plugs until the
preceding group of filter plugs are completely bagged, at which
time the gate 18 is reciprocated to permit the detained filter
plugs to drop into the upper open end of a tube of the wrapping
material which is sealed about the predetermined number of plugs to
form the bag of filter plugs. In this connection, the bagging
station 20 directs a web of the selected wrapping material and
shapes it into a tube, the overlapping marginal side edges of which
are heat sealed and a pair of horizontally reciprocal heat sealers
cooperate in sealing the lower end of the formed tube and when the
predetermined number of cut filter plugs are collected in the tube
of wrapping material these heat sealers reciprocate to seal the
tube above the collected plugs. At the same time, the sealers seal
a zone of the tube of sufficient width to form the sealed lower end
of the following bag to be formed. The tube is cut at an
intermediate section of this heat sealed zone and the lower formed
bag is permitted to drop into a suitable receptacle for
collection.
HOPPER
The hopper 10 receives and directs downwardly filter rods 22 of
predetermined length, preferably a length of 105mm. The hopper 10
includes a rear wall 24 and a front wall 26 which may be as shown
formed of an upper and lower hinged panel to provide easy access to
the filter plugs and operating parts associated with the slitting
drum 12. The hopper is also provided with a pair of spaced
vertically extending walls 28 and 30 each of which extends
respectfully into downwardly and inwardly depending walls 32 and
34. The upper end of the hopper 10 is open and has associated
therewith a pair of tray racks 36 and 38 which serves to support
one or several, as the case may be, trays 40 filled with 105mm
filter rods. Each tray 40 includes a slat fitted to the tray bottom
which may be manually removed from the tray 40 situated above the
hopper 10 thereby permitting the filter rods 22 to drop into the
hopper 10. When the tray 40 is emptied of its filter rods 22, it is
removed and the next tray 40a on the racks 36 and 38 is shoved into
place over the hopper 10 and its bottom slat is eventually removed
to permit the contained filter rods to drop into the hopper 10.
The filter rods 22 and the lower part of the hopper 10 are directed
to the slitting drum 12 and specifically the open flutes
therein.
SLITTING DRUM
The slitting drum 12 collects a predetermined number of filter rods
22 in its open flutes and transports them to the cutting station
14. A refuser roller 42 which may have associated therewith a
one-way safety clutch turns or rotates in the opposite direction to
the drum rotation. This opposed movement tends to agitate the
filter rods 22 causing the rods to fill the open flutes while at
the same time permitting only rods that are in the flutes to pass.
Should the rods jam for one reason or another, the safety clutch is
activated to cause the machine to stop operating.
The slitting drum is made up of a given number of flutes and in
accordance with a successful embodiment of the invention the
circumference of the drum is divided as follows: 20 open flutes, 7
closed flutes, 20 open flutes and 7 closed flutes. The 105mm filter
rods are received in he open flutes and are adapted to be cut at
the cutting station 14 into five equal sections of 21mm lengths.
Inasmuch as the successful embodiment of the invention contemplates
and requires 100 21mm long filter plugs per bag, one revolution of
the slitting drum 12 produces cut filter plugs for two bags of 100
filter plugs. The closed flutes of the slitting drum 12 allow
sufficient time for the bag forming, sealing and cutting operations
at the bagging station 20.
After the rods 22 in the open flutes pass under the refuser roller
42, they are held in place by guides 44 while traversing the
cutting station 14 and until the lower discharge point is reached
during the travel of the drum 12.
The absence of a filter rod in the open flutes is detected by a
normally closed microswitch 46. As will be appreciated, it is not
desirable to market bags of filter plugs containing less than the
prescribed number, notably 100 in the discussed successful
application. To insure this count, the microswitch 46 will send a
signal if an open flute does not contain a filter rod 22. When all
flutes are filled, no signal is obtained from this switch 46. The
signal is generated when an empty flute does not contain a filter
rod and is transmitted to a diverter system 48 which operates to
remove the underfilled bag from the main production flow.
The periphery of the drum 12 is provided with four equally spaced
circumferentially extending knife receiving slits 50 which receive
and cooperate with the rod slitting knives at the cutting station
14 in cutting the rods 22 into the selected or prescribed length of
filter plugs.
CUTTING STATION
At the cutting station 14 the selected number of rotatably driven
cutting knives 52 cut the filter rods 22 in the open flutes of the
slitting drum 12 into equal length filter plugs 54. As indicated,
the rods 22 are cut into five equal sections having lengths of 21mm
and this successful application included four cutting knives 52 at
the cutting station 14. During the cutting of the rods 22, the
guides 44 also serve as anti-spin control elements. After the rods
22 are cut into the filter plugs 54, the cutting station 14 is
eventually passed and the cut filter plugs 54 drop out of the
slitting drum 12 into the funnel 16.
In order to assure the complete removal of the cut filter plugs 54
from the open flutes and the periphery of the slitting drum 12, a
stripper assembly 56 may be provided. This stripper assembly
includes a selected number of fingers 58 of relatively thin
material or metal which are adapted to enter the slits 50 which
receive the cutting knives 52 as well as a number of other
circumferentially extending openings or slits in the periphery of
the drum 12. Should there be any filter Plug retained in an open
chute, it will most likely be engaged by one of the fingers 58
assuring its removal from the slitting drum 12 and eventual
discharge into the funnel 16.
FUNNEL AND COUNTING GATE
As the filter plugs 54 are discharged from the slitting drum 12,
they are dropped into the upper enlarged open end 60 of the funnel
16. The lower reduced end 62 has associated therewith gate 18 which
is closed as the filter plugs start to drop into the funnel 16.
After a predetermined period of time and specifically until the
preceding group of plugs has been completely enclosed and sealed at
the bagging station 20, the gate 18 is opened to permit the plugs
to drop through the lower end 62 into the bagging station 20. In
the successful application of this invention, the gate 18 remains
closed until about 30 percent of the plugs are in the funnel 16.
The opening and closing of the gate 18 may be accomplished by means
of a piston and air cylinder assembly 64 coupled to the gate.
When all of the filter plugs 54 have cleared the counting gate 18,
the gate is again closed so that there will be time for the bag
forming process to be completed at the bagging station. The piston
and cylinder assembly 64 may be of the pneumatic type and is
controlled by a programmer 65, the cams of which are driven in time
sequence and in time relation to the rotation of the slitting drum
12. The cams of the programmer 65 open and close valves which allow
air to flow to the proper side of the air cylinder assembly 64 to
move the gate 18 in and out in relation to the funnel 16.
BAGGING STATION
At the bagging station the filter plugs drop into a tube 66, the
lower end 68 of which has been closed and sealed as the previous
bag 70 was sealed and completely enclosed about the previous group
of filter plugs. The tube 66 is formed from a web 72 of the
selected wrapping material which in the successful application of
the invention was cellophane. This web 72 is delivered to a tube
former 74 which forms tube 66. The overlapping marginal side edges
of the tube are heat sealed together by means of the heat sealer
76.
The ends of the bag 70 are heat sealed by means of the pair of
opposed laterally reciprocal heaters 78 and 80 which are reciprocal
towards and away from one another by means of a pair of twin wheels
82 and 84 respectively. As the twin wheels 82 and 84 rotate the
heat sealers 78 and 80 respectively come together when spaced
projecting cams 86 on the wheels are engaged. At the same time one
of the sealers contains a knife 88 which as the wheels turn also
moves over a cam causing the knife to move out of its accommodating
slot through the intermediate portion of the heat sealed zone, thus
shearing the bag 70 from the tube 66. As the wheels 82 and 84
continue their rotation, the end heat sealers 78 and 80 disengage
or retract permitting the plug filled bag 70 to drop into a box or
other suitable collecting receptacle.
DIVERTER SYSTEM
As explained in the above, if an underfilled bag 70 is detected as
a result of the actuation of microswitch 46 because of a flute not
filled with a filter rod 22, the detector system 48 is actuated to
remove this bag from the line. In this connection, the diverter
system 48 may include a conventional pin type memory wheel. The
signal from the microswitch 46 shifts the appropriate pin on the
memory wheel corresponding to the bag 70 that is to be underfilled.
This memory wheel in turn activates a diverter 90 at the required
time sequence; and the underfilled bag is diverted from the main
production flow.
SUMMARY
In summarizing the operation of the apparatus for forming and
bagging filter plugs, reference is made to FIGS. 1 and 5, the
latter depicting the drive of the several parts and their controls.
As will be evident in this figure, the knives 52 at the cutting
station 14 are independently driven by a motor whereas the
remaining parts take their drive off of the motor associated with
the bagging station 20. Thus, the filter rods 22 initially
contained in tray 40 find their way down the hopper 10 to one of
the open flutes of slitting drum 12. Refuser roll 42 will assure
proper entry of the rods 22 in the open flutes to the cutting
station 14. There the rods 22 are cut into five sections. In the
specific embodiment discussed, the rods are 105mm in length and the
filter plugs 54 will be 21mm in length. At the same time, 20 open
flutes are provided thereby assuring the formation of 100 filter
plugs per group. Should one of the open flutes not be filled with a
rod 22, the sensing microswitch 46 will generate a signal which
eventually will be received by the diverter system 48 which
operates to cause the diverter 90 to eliminate the underfilled bag
70. The cut plugs 54 reach the discharge point on the drum 12 and
are dropped into the funnel 16. The stripper assembly 56 assures
the removal of all of the cut plugs 54 from the periphery of the
drum 12. The gate 18 will close the lower end of the funnel 16
until the previous group of filter plugs 54 are suitably bagged, at
which time the programmer 65 will actuate the piston and cylinder
assembly 64 to retract gate 18 thereby opening the path for the
plugs 54 to drop into the upper open end of the cellophane tube 66.
This tube will have its overlapping marginal side edges heat sealed
by means of a heat sealer 60. Sufficient time is allotted for the
group of filter plugs to accumulate at the lower end of the tube 66
at the sealed lower end 68. Thereafter, the heat sealers 78 and 80
are actuated by the respective timing wheels 82 and 84, the
projecting cams 86 of which causes the heaters 78 and 80 to shift
inwardly to heat seal the tube 66 above the collected filter plugs
54. At the same time knife 88 will be shifted outwardly to sever
the heat sealed zone at an intermediate location thereby producing
a completed bag 70 and the sealed lower end 68 of the following bag
to be produced.
Thus, the several aforenoted objects and advantages are most
effectively attained. Although a single preferred embodiment of the
invention has been disclosed and described in detail herein, it
should be understood that this invention is in no sense limited
thereby and its scope is to be determined by that of the appended
claims.
* * * * *