US3633590A - Production of cigarettes - Google Patents

Production of cigarettes Download PDF

Info

Publication number
US3633590A
US3633590A US4588A US3633590DA US3633590A US 3633590 A US3633590 A US 3633590A US 4588 A US4588 A US 4588A US 3633590D A US3633590D A US 3633590DA US 3633590 A US3633590 A US 3633590A
Authority
US
United States
Prior art keywords
rod
pressure
cigarette
chamber
pressure chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US4588A
Other languages
English (en)
Inventor
Frederick Pocock
Ivan Yehudi Hirsh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Molins Machine Co Ltd
Original Assignee
Molins Machine Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Molins Machine Co Ltd filed Critical Molins Machine Co Ltd
Application granted granted Critical
Publication of US3633590A publication Critical patent/US3633590A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/32—Separating, ordering, counting or examining cigarettes; Regulating the feeding of tobacco according to rod or cigarette condition
    • A24C5/34—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes
    • A24C5/3418—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes by pneumatic means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S131/00—Tobacco
    • Y10S131/904—Pneumatic means for sensing condition or characteristic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S131/00—Tobacco
    • Y10S131/906—Sensing condition or characteristic of continuous tobacco rod
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S131/00—Tobacco
    • Y10S131/907—Ejection or rejection of finished article due to detected or sensed condition

Definitions

  • This invention concerns improvements relating to the production of cigarettes, and is particularly concerned with a method and apparatus for producing cigarettes that are satisfactory to the smoker and are economical in the use of tobacco.
  • a preferred cigarette-making machine includes a tobacco filling indicator including a member defining a pressure chamber with openings through which the cigarette rod passes, means for supplying the pressure chamber with gas (for example air) at a pressure which is sufficient to compress a relatively soft cigarette (i.e., one which is inadequately filled) but is low enough not to damage permanently an adequately filled cigarette, and a comparator for comparing the cross section of the cigarette rod before and immediately after passage through the pressure chamber, and for producing a correction signal when the difference in cross section is above a predetermined amount. A drop in the crosssectional area below a predetermined proportion indicates that the rod at that point is insufiiciently filled.
  • the correction signal may, for example, activate an ejector mechanism which automatically ejects the insufi'iciently filled cigarettes, or it may adjust the tobacco feed to the rod, or it may be capable of initiating both of these actions.
  • Adjustment of the tobacco feed may in principle take various forms.
  • the adjustment may be achieved by varying steplessly the height of the trimmer as described in any of British Pat. No. 854736/8.
  • the degree of compression of the tobacco before wrapping may be varied automatically in response to the correction signals from the comparator by arranging that the correction signals vary the suction pressure holding the tobacco stream against the perforated band which carries the tobacco stream during trimming.
  • the measure of cigarette rod diameter before and after passage through the pressure chamber is obtained by passing the rod through additional precompression and postcompression measurement chambers lying respectively ahead of and behind the pressure chamber, in relation to movement of the cigarette rod, and by supplying gas (for example air) to these two chambers at a pressure below that of the gas in the pressure chamber.
  • gas for example air
  • Each of these measurement chambers includes a wall formed with an aperture through which the cigarette rod passes to enter or leave the chamber, the aperture defining with the cigarette rod an annular orifice through which air flows at a rate dependent upon the diameter of the part of the rod lying within the aperture.
  • This air flow produces a pressure drop, for example through a restrictor through which air is supplied to the chamber, so that the pressure in each measurement chamber is indicative of the diameter of the rod.
  • the difference in pressure between the two low-pressure measurement chambers is indicative of the reduction in cross-sectional area caused by the air pressure in the high-pressure chamber.
  • the present invention does not provide a means merely of measuring the rod cross-section or diameter. Slight variations in diameter are permissible so long as the feel of the cigarette is right. This invention makes possible the direct control of the feel, that is to say the firmness of the tobacco filling of the cigarette rod.
  • FIG. 1 is a longitudinal section through one simple form of filling indicator
  • FIG. 2 is a longitudinal section through a different indicator
  • FIG. 3 is a longitudinal section through a third indicator
  • FIG. 4 is a section on the line IV-IV in FIG. 3.
  • the filling indicator shown diagrammatically in FIG. I includes a tube 2 defining firstly a pressure chamber 4 including end walls 6 and 8.
  • the cigarette rod 10 passes through circular openings in the end walls 6 and 8 and is completely surrounded by gas in the pressure chamber 4. Air or some other gas is supplied continuously to the pressure chamber through a pipe 12.
  • the air pressure is preset at the lower limit of cigarette filling pressure which is considered desirable in the cigarette, e.g. say 7.5 centimeters of mercury gauge or higher.
  • each of the air inlet pipes 18 and 20 has a restrictor 22 or 23 so that there is a pressure drop across the restrictor of an amount dependent upon the rate of gas flow through the restrictor.
  • a comparator device 32 for example a differential pressure transducer, is connected to the chambers 14 and 16 through pipes 34, 35 and reacts to the pressures in the chambers 14 and 16 through pipes 34, 35 and reacts to the pressures in the chambers 14 and 16.
  • the comparator device 32 When the comparator device 32 signals a difference between the pressures in the chambers 14 and 16, it is an indication that the portion of the cigarette rod occupying chamber 16 has been deformed in its passage through chamber 4.
  • the transducer When the differential pressure exceeds a predetermined level, the transducer activates an ejector which ejects the cigarette cut from the faulty part of the rod.
  • the comparator device 32 may be in the form of a pressure-balanced diaphragm carrying one or more switch contacts which cooperate with one or more fixed contacts to operate an ejector mechanism 33 when the diaphragm is displaced sufficiently by the action of a pressure differential across the diaphragm, opposite sides of the diaphragm being in communication with the chambers 14 and 16 respectively.
  • This arrangement may be similar to that described in British Pat. Nos. 888,478 or 918,843.
  • the comparator may include a delayed action device so as to make comparisons always in relation to the same part of the cigarette rod.
  • One form of comparator which may be used comprises two spaced coaxial diaphragms joined by a member which forms or carries a part forming a movable core for an electrical inductance or transformer, the outer faces of the two diaphragms being exposed respectively to the pressures transmitted by the pipes 34 and 35 leading from the measuring chambers.
  • This enables an electrical output signal to be obtained by means of the inductance or transformer, the value of the signal being dependent upon the position of the core member which in turn depends upon the relative values of the pressures in the two measuring chambers.
  • the manifold from which gas flows into the pipes 18 and 20 should be of relatively large volume, so that fluctuations in the rate of flow do not produce significant fluctuations in the inlet pressure.
  • the volumes of the chambers 14 and 16 should be small to accentuate the pressure fluctuations in them caused by flow variations. It will be appreciated that FIG. 1 is diagrammatic, and that the inner diameters of the chambers 14 and 16 should in fact be not much greater than the cigarette rod diameter.
  • the three chambers 4, 14 and 16 may be formed within a single tubular casing.
  • the end walls dividing the casing into the appropriate separate chambers may be formed by removable thin washers spaced and sealed by rubber O-rings. This would enable different washers with different hole diameters to be used in the manufacture of cigarette rod of differing diameters. Moreover, it would then be possible to use difi'erent washers for the chambers l4 and 16 and to vary the ratio of hole diameters in any desired fashion.
  • this modified construction may have two washers between each adjacent pair of chambers, corresponding to the end walls 6 and 28 (or 8 and 26), with a chamber between the two washers which is freely vented to atmosphere.
  • the invention may be performed by means of a modified comparator arrangement including just one washer between each adjacent pair of chambers (that is, with no intervening vented chamber); in this case gas flowing from the pressure chamber, around the cigarette rod, passes into the low-pressure chambers l4 and I6 and leaves these chambers through the pipes 18 and 20. Gas also leaves the chambers 14 and 16 through the end wall washers 24 and 30, but the arrangement may be such that this gas flow is considerably less than that through the pipes 18 and 20. The pressure in either chamber 14 or 16 in this case decreases as the cigarette rod diameter increases and vice versa.
  • the chambers 14 and 16 may be omitted, and the comparison of precompression and postcompression rod diameters may be achieved by some other means of comparing the flow rates out of the end walls 6 and 8.
  • the apertures in the end walls may each be shaped as a venturi in the throat of which a pressure tapping is taken. The pressure in the venturi throat varies inversely with the rod diameter since a decrease in the rod diameter increases the air velocity through the venturi and vice versa.
  • FIG. 2 of the accompanying drawings shows an example of this construction.
  • the cigarette rod 40 passes through a pressure chamber 42 within a hollow tubular body 44, the entry apertures being defined by two similar venturi members 46 and 48 which have threaded ends 50 and 52 screwed into the body 44, with sealing rings 45.
  • the bore in each venturi member diverges in each direction away from a throat zone 54 or 56 which, in the example shown, is of constant diameter for an axial extent slightly greater than the diameter.
  • Pressure tapping pipes 58 and 60 lead through radial bores 62 and 64 into the venturi throats, while compressed air, for example at 7.5 centimeters of mercury gauge, is supplied to the pressure chamber through a pipe 66.
  • each venturi may have a number of tappings (for example four at intervals around the venturi axis) all connected to give an average signal to the pressure transducer (not shown).
  • each venturi throat may be formed with a circumferential groove in its throat, the pressure tapping being in communication with the groove.
  • each venturi member may extend some way into the pressure chamber and may have a sharp orifice edge to drop the pressure of air flowing out of the pressure chamber through the venturis.
  • the gradual tapering of each venturi bore to the throat may start from the sharp edge.
  • the distance between the venturi tapping bores 62 and 64 may equal the length of the cigarettes which are subsequently cut from the rod.
  • the compression chamber 42 in FIG. 2 there may for example be one or more layers of wire mesh across the chamber, through which air from the inlet 66 flows before it reaches the rod. Below the mesh there may be a tapping connected to a pressure gauge to indicate the air pressure around the rod.
  • each venturi member may in principle be substantially of constant diameter, though it should preferably open out towards the inner end in the case of the venturi member 48 and towards the outer end in the case of the ventu ri member 46 in order to give an appropriate lead in for the rod.
  • a comparator for example for use with the FIG. 2 device may be a tluidics type of device comprising a block with one passageway which is intersected by a lateral passageway to opposite ends of which the pipes 60 and 58 are connected. Compressed air is blown continuously through the first passageway and may be delivered from the pressure chamber (for example from an outlet in the end cap at the end remote from the inlet 66) or from the same source.
  • the reduced pressure in the pipe 60 allows the air in the pipe 58 to deflect the flow in the first passageway momentarily into a bypass passageway which extends from the junction of the first two passageways at an appropriate slight inclination to the first passageway.
  • This momentary flow in the bypass passageway may be used to operate an ejector mechanism for ejecting the faulty cigarette cut subsequently from the squashed part of the rod.
  • the bypass passageway may be connected to a nozzle situated in a position such that the puff of air through the bypass passageway itself blows the faulty cigarette laterally out of the cigarette stream.
  • FIGS. 3 and 4 show a different indicator which in principle is similar to that shown in FIG. 1. Parts corresponding to those in FIG. 1 have the same reference numerals.
  • the three chambers 4, 14 and 16 in FIG. 3 are all within a tubular member 70 and are separated by stacks of washers 72 and 74.
  • Each of these stacks is formed by alternating washers of different construction; in each stack the outer washers and three inner washers are plain metal washers, while the intervening washers (shown diagrammatically simply as washers of greater thickness) are washers or other members which can space apart the successive plain washers while allowing air to flow radially outwards between the plain washers and out through slots 76 in the tubular member 70.
  • the parts between the plain washers may for example be like lock washers with slightly twisted radial teeth, or may have a circumferentially undulating form.
  • the outer ends of the chambers 14 and 16 are defined respectively by walls 24 and 30 each of which consists of two plain washers spaced apart by a middle washer which is like the twisted tooth or equivalent washers in the stacks 72 and 74. Accordingly air can leak out of the chambers 14 to 16 in the same way as in FIG. 1, the amount of air flow (and consequently the pressure drop through the restrictor 22 or 23) being dependent on the cross-sectional area of the relevant part of the rod 10. Air is supplied by a pipe 78 to all three chambers, the pressure drop through the restrictors l8 and being sufiicient to provide the required relatively low mean pressures in the chambers 14 and 16. The pressure in the chamber 4 is indicated by a gauge 80.
  • Each of the measuring chambers contains a ring 82 or 84 to which the associated pipes 18 and 34 or 20 and 35 are connected.
  • This arrangement enables the distance between the mid points of the chambers 14 and 16 to be varied by replacing spacer sleeves 86 and 88 with sleeves of different length; preferably in use this distance is made equal to one cigarette rod length.
  • the assembly is completed by screw-threaded plugs 100 and 102 and by six O-rings (i.e. sealing rings) as shown.
  • the inner diameter of the plain washers provides a clearance fit around the cigarette rod to allow the necessary air leakage from the chambers 14 and 16.
  • the inner diameter of the twisted tooth or equivalent washers may be larger so as to be quite clear of the surface of the rod.
  • apparatus may in principle be arranged to receive cut cigarettes moving side ways, for example in flutes in a carrier drum.
  • the cigarette carrier and a closure member may, at a suitable testing point, define a series of axially spaced chambers around each cigarette connected alternately to pressure (through restrictors) and atmosphere, with transducer tappings to the pressure chambers; the transducer arrangement may, for example, compare the pressure in an end pressure chamber around the densely filled part of the cigarette (taken as a datum) with each of the other pressures.
  • the carrier and closure members may both be fluted drums rotating side by side, the testing point being between the drums.
  • a machine or method according to the invention may include provision for detecting the degree of moisture in the tobacco and for compensating for any deviation from the average figure in so far as the moisture may effect the firmness of the cigarette rod.
  • the moisture compensating system may be arranged, for example, to lower the firmness level below which signals from the comparator system cause the ejector mechanism to operate in the case of cigarettes with a much higher than average moisture content.
  • a cigarette filling indicator comprising means for defining a pressure chamber around a continuous axially moving cigarette rod; means for supplying compressed air to the chamber around the cigarette rod tocompress slightly at least an inadequately filled rod; pressure tapping means for producing pressure signals at axially spaced positions along the rod as a result of leakage between the rod and a surrounding part of the indicator, which leakage is dependent upon the cross-sectional area of the particular part of the rod, the said pressure tapping means being situated respectively upstream and downstream of the pressure chamber in relation to movement of the rod; and a comJJarator device for comparingthe different pressures to pro uce a correction signal indicative of an inadequately filled rod portion.
  • An indicator according to claim 3 in which the pressure chamber is isolated from each of the measuring chambers by a stack of washers spaced apart so as to allow air to flow out radially between the washers and through an opening in the wall of the tubular member.
  • an indicator according to claim 4 in which the opening comprises at least one slot through which pipes extend which respectively supply air to the measuring chamber and serve as the pressure tapping, so that the position of the measuring chamber along the tubular member can be varied.
  • a cigarette making machine including a filling pressure indicator according to claim 1 and a device which, in response to correction signals from the comparator device, ejects cigarettes cut from parts of the rod which are inadequately filled.
  • a cigarette-making machine comprising means for forming a continuous cigarette rod; means cutting the continuous rod into cigarette lengths; means for ejecting unsatisfactory cigarette lengths; and testing means mounted ahead of the cutting means for testing the filling pressure of the rod; said testing means comprising a pressure chamber mounted in line with the continuous rod and having end walls formed with openings through which the rod passes, two measuring means positioned respectively upstream and downstream of the pressure chamber and sensitive respectively to the cross-sectional area of the rod before and after it passes through the pressure chamber, and comparator means connected to the said measuring means for operating the said cigarette ejector means when the difference between the signals from the two measuring means is above a predetermined level.

Landscapes

  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
US4588A 1969-01-31 1970-01-21 Production of cigarettes Expired - Lifetime US3633590A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB530569 1969-01-31

Publications (1)

Publication Number Publication Date
US3633590A true US3633590A (en) 1972-01-11

Family

ID=9793596

Family Applications (1)

Application Number Title Priority Date Filing Date
US4588A Expired - Lifetime US3633590A (en) 1969-01-31 1970-01-21 Production of cigarettes

Country Status (5)

Country Link
US (1) US3633590A (enrdf_load_stackoverflow)
DE (1) DE2003691C3 (enrdf_load_stackoverflow)
FR (1) FR2029760A1 (enrdf_load_stackoverflow)
GB (1) GB1304343A (enrdf_load_stackoverflow)
SE (1) SE356207B (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921644A (en) * 1967-10-09 1975-11-25 Hauni Werke Koerber & Co Kg Apparatus for determining the firmness of fillers in cigarette rods or the like
US4121450A (en) * 1976-01-28 1978-10-24 Zellweger Uster Ltd. Apparatus for measuring the density of a moving elongate mass of filiform material
US4273139A (en) * 1979-12-20 1981-06-16 Brown & Williamson Tobacco Corporation Firmness improvement in cigarette rod
FR2517519A1 (fr) * 1981-12-09 1983-06-10 Molins Plc Procede et dispositif pour controler la qualite de produits a fumer, tels que cigarettes, pendant leur production
US4413637A (en) * 1981-01-19 1983-11-08 Philip Morris Inc. Dynamic circumference gage
US4543816A (en) * 1983-04-30 1985-10-01 Hauni-Werke Korber & Co. K.G. Method and apparatus for monitoring the diameters of rod-shaped products of the tobacco processing industry
US4811744A (en) * 1987-04-02 1989-03-14 B.A.T. Cigarettenfabriken Gmbh Apparatus for measuring the draw resistance of a rod of tobacco fibers
US20090005989A1 (en) * 2007-05-31 2009-01-01 Philip Morris Usa Inc. Inspection systems and methods for multi-segment products
US20090088687A1 (en) * 2007-10-01 2009-04-02 Baxter International Inc. Medical fluid air bubble detection apparatus and method
US20190261674A1 (en) * 2015-07-17 2019-08-29 Altria Client Services Llc Rod forming apparatus and method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1525432A (en) * 1976-03-05 1978-09-20 Measurex Corp Measuring the weight of cigarette rod

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2792569A (en) * 1953-12-29 1957-05-14 Sheffield Corp Gauging device
US2952262A (en) * 1957-01-30 1960-09-13 Molins Machine Co Ltd Manufacture of cigarettes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2792569A (en) * 1953-12-29 1957-05-14 Sheffield Corp Gauging device
US2952262A (en) * 1957-01-30 1960-09-13 Molins Machine Co Ltd Manufacture of cigarettes

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921644A (en) * 1967-10-09 1975-11-25 Hauni Werke Koerber & Co Kg Apparatus for determining the firmness of fillers in cigarette rods or the like
US4121450A (en) * 1976-01-28 1978-10-24 Zellweger Uster Ltd. Apparatus for measuring the density of a moving elongate mass of filiform material
US4273139A (en) * 1979-12-20 1981-06-16 Brown & Williamson Tobacco Corporation Firmness improvement in cigarette rod
US4413637A (en) * 1981-01-19 1983-11-08 Philip Morris Inc. Dynamic circumference gage
FR2517519A1 (fr) * 1981-12-09 1983-06-10 Molins Plc Procede et dispositif pour controler la qualite de produits a fumer, tels que cigarettes, pendant leur production
EP0081391A3 (en) * 1981-12-09 1984-07-18 Molins Plc Cigarette monitoring
US4567752A (en) * 1981-12-09 1986-02-04 Molins, Plc. Cigarette monitoring
US4543816A (en) * 1983-04-30 1985-10-01 Hauni-Werke Korber & Co. K.G. Method and apparatus for monitoring the diameters of rod-shaped products of the tobacco processing industry
US4811744A (en) * 1987-04-02 1989-03-14 B.A.T. Cigarettenfabriken Gmbh Apparatus for measuring the draw resistance of a rod of tobacco fibers
US20090005989A1 (en) * 2007-05-31 2009-01-01 Philip Morris Usa Inc. Inspection systems and methods for multi-segment products
US7784356B2 (en) * 2007-05-31 2010-08-31 Philip Morris Usa Inc. Inspection systems and methods for multi-segment products
US20090088687A1 (en) * 2007-10-01 2009-04-02 Baxter International Inc. Medical fluid air bubble detection apparatus and method
US8033157B2 (en) * 2007-10-01 2011-10-11 Baxter International Inc. Medical fluid air bubble detection apparatus and method
US20190261674A1 (en) * 2015-07-17 2019-08-29 Altria Client Services Llc Rod forming apparatus and method
US10827778B2 (en) * 2015-07-17 2020-11-10 Altria Client Services Llc Rod forming apparatus and method
US11737487B2 (en) 2015-07-17 2023-08-29 Altria Client Services Llc Rod forming apparatus and method
US12075813B2 (en) 2015-07-17 2024-09-03 Altria Client Services Llc Rod forming apparatus and method

Also Published As

Publication number Publication date
DE2003691B2 (de) 1978-01-05
DE2003691A1 (de) 1970-11-19
SE356207B (enrdf_load_stackoverflow) 1973-05-21
DE2003691C3 (de) 1978-09-07
GB1304343A (enrdf_load_stackoverflow) 1973-01-24
FR2029760A1 (enrdf_load_stackoverflow) 1970-10-23

Similar Documents

Publication Publication Date Title
US3633590A (en) Production of cigarettes
US2952262A (en) Manufacture of cigarettes
US5116298A (en) Control process and apparatus for the production of cigarette filters
US4543816A (en) Method and apparatus for monitoring the diameters of rod-shaped products of the tobacco processing industry
US4259769A (en) Method and apparatus for banding tows of filamentary material
US4223551A (en) Apparatus for ascertaining the resistance of cigarettes or the like to axial flow of gases therethrough
US4154090A (en) Process and apparatus for multiple testing of wrappers of cigarettes or the like
US4287754A (en) Apparatus for and method of multiple testing of wrappers of cigarettes or the like
US3595067A (en) Method and apparatus for determining the firmness of fillers in cigarette rods or the like
US4184361A (en) Sliver density sensing apparatus
US3913381A (en) Method and apparatus for testing cigarettes or the like
US3962906A (en) Method and apparatus for testing cigarettes or the like
US4121450A (en) Apparatus for measuring the density of a moving elongate mass of filiform material
US4177670A (en) Method and apparatus for multiple testing of wrappers of cigarettes for porosity
US4403501A (en) Method and device for the electropneumatic testing of cigarette filters
US3411513A (en) Method and apparatus for gauging and controlling firmness in cigarettes and the like
US3783677A (en) Method and apparatus for testing cigarettes or like rod-shaped articles
US3720095A (en) Method of testing cigarette paper
US4248139A (en) Manufacture of filters for cigarettes
US3921644A (en) Apparatus for determining the firmness of fillers in cigarette rods or the like
GB1258582A (enrdf_load_stackoverflow)
US3847044A (en) Method and apparatus for testing wrappers of cigarettes or the like
US4471650A (en) Apparatus for testing cigarettes or the like
CA1322874C (en) Apparatus for measuring the draw resistance of a rod of tobacco fibres
US3585844A (en) Measuring device