EP0390732A1 - Automatische Steuervorrichtung zum Zuführen von Tabakteilchen zu einer Maschine - Google Patents

Automatische Steuervorrichtung zum Zuführen von Tabakteilchen zu einer Maschine Download PDF

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Publication number
EP0390732A1
EP0390732A1 EP90810178A EP90810178A EP0390732A1 EP 0390732 A1 EP0390732 A1 EP 0390732A1 EP 90810178 A EP90810178 A EP 90810178A EP 90810178 A EP90810178 A EP 90810178A EP 0390732 A1 EP0390732 A1 EP 0390732A1
Authority
EP
European Patent Office
Prior art keywords
shutter
sleeve
tobacco
segment
inlet
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.)
Granted
Application number
EP90810178A
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English (en)
French (fr)
Other versions
EP0390732B1 (de
Inventor
Bernard Tallier
Michael Lauenstein
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.)
Philip Morris Products SA
Original Assignee
Fabriques de Tabac Reunies SA
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 Fabriques de Tabac Reunies SA filed Critical Fabriques de Tabac Reunies SA
Publication of EP0390732A1 publication Critical patent/EP0390732A1/de
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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
    • A24C5/39—Tobacco feeding devices
    • A24C5/392—Tobacco feeding devices feeding pneumatically
    • 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
    • Y10S131/909—Sensing condition in feed hopper for cigar or cigarette making

Definitions

  • Controlling the feeding of machines which process tobacco particles is an operation which we seek to automate to the greatest possible extent, but which must be able to react to unforeseen or abnormal phenomena which are often difficult. to translate into measurable parameters.
  • Locks are devices in which the flow of tobacco particles carried by the flow of aspirated air is separated from the air.
  • tobacco particles fall by gravity or under the effect of a centrifugal force under conditions such that they separate from the air flow and are collected in a hopper, from where they feed the machine.
  • the flow rate of the tobacco flow can be adjusted by means which are arranged at the entrance to each of the conduits, above the tobacco bed.
  • Patent application CH-4450/87 describes a simple device to achieve this goal.
  • the prior document GB-2 139 870 also describes a device for feeding a tobacco particle processing machine.
  • a sliding tubular segment is provided at the entrance to the duct which conveys the tobacco flow.
  • the tubular segment is moved by a control device between a position where the tobacco is sucked from the bed and a position in which it is not sucked.
  • the flow is also adjusted by shutters located in the air intake duct, beyond the separator, and in the machine inlet duct.
  • Another arrangement known from US Pat. No. 3,544,167 also comprises, at the entrance to each duct guiding the flow of tobacco, a mobile tubular segment, controlled as a function of the desired flow rate.
  • this tubular segment is controlled all-or-nothing, so that it does not make it possible to control a flow whose flow rate varies at will.
  • the present invention provides a very simple device capable of responding to a programmed command and this automatically. Not only does this device avoid, by its simplicity, the difficulties and drawbacks of the devices known up to now, but also it provides several functions which until now required the presence of separate means.
  • the object of the present invention is a device for controlling the flow rate of a stream of tobacco particles intended for feeding a machine, comprising a duct with a rigid and fixed wall, with, at a end, an inlet opening situated opposite a tobacco bed, and suction means for circulating in the duct a flow of air capable of conveying the flow of tobacco particles from the inlet opening towards the machine, characterized in that the duct comprises an inlet segment with, at one of its ends, the said inlet opening and, at the other end a branch provided with a discharge opening and a shutter of this opening, and in that the shutter is controlled as a function of the values of one or more parameters represented by the time and / or the pressure in the input segment.
  • the tobacco particles come from a reservoir (not shown) and flow along a path represented schematically by 3, so as to arrive on a flat support 4, on which is placed a bed 5 animated by a vibratory movement whose amplitude and frequency can, if necessary, be modified at will.
  • bed 5 which is permanently covered with a layer of loose tobacco particles, open three rigid ducts with fixed walls, designated by 6, which lead to each of the locks 2.
  • each from these locks leave pipes 7 which meet in a suction duct 8 leading to the suction inlet of a blower 16.
  • each of the rigid conduits 6 has an initial vertical part which extends above the bed 5.
  • This part is diagrammatically shown on a larger scale in FIG. 2.
  • This figure shows the lower part of a duct 6 which has an inlet segment designated by 9.
  • This inlet segment extends from an inlet opening 10, provided with a flange 11 and arranged above the bed 5 upwards to a branch 12 from which a short discharge segment 13 leaves with a discharge opening 14 and a shutter 15 shown in a completely schematic manner in FIG. . 2.
  • This shutter can be controlled by a motor or by a cylinder. Nor maliciously, it is either in the open position or in the closed position. It is understood, however, that in certain variants of the device described, provision could be made for progressive control of this shutter.
  • the inlet opening 10 and the inlet segment 9 of the conduit 6 are also equipped with a sliding sleeve 23.
  • This sleeve comprises a tube segment 17 open at its two ends, the diameter of which is slightly less than that of the leads 6 to its base. It is carried by a tubular frame 22, rigidly fixed on it and provided with two diametrically opposite longitudinal slots 18. In these slots are engaged rods 19 integral with the wall of the conduit 6, a little above the opening of entry 10.
  • the sliding sleeve 23 rests under the effect of its weight on the rods 19 whose upper generatrix forms an upper stop on which the upper end of the slots 18 rests.
  • the sleeve 23 comprises in addition, at its base, a flange 20.
  • FIG. 6 shows how the automatic control device is designed from the point of view of electrical connections.
  • a motor M for controlling the shutter 15 a time sensor T, a pressure sensor P which is the sensor 21 of FIG. 2 as well as a motor S which represents the drive motor of the blower 16 sucking air through the duct 8.
  • the diagram of the device shown in fig. 6 in a completely simplified manner, comprises a memory Me and a processor Pr, the whole being arranged so as to allow the operation of the input units and the output units described according to a predetermined program, this program ensuring an optimization of the tobacco machine supply.
  • Figs. 3 to 5 illustrate the conditions that the program must meet.
  • Fig. 4 shows a typical curve giving the flow of tobacco Q which it is necessary to supply to the machines during a certain period of time. As can be seen, the flow rate can be quite highly variable.
  • Fig. 5 shows how, in a program case, the required bit rate will be obtained as a function of time.
  • the blower or the general compressor 16 which ensures the air flow in the conduits 6 will be kept in operation permanently at a stable speed and the supply of the various machines 1 will be ensured simply by operating the shutters 15 by means of the motors M.
  • Q1 a stable value
  • This value Q1 depends on the geometry of the installation and the power of the blower 16. On the contrary, if the shutter 15 is open, the air is sucked in by the segment 13 and the discharge opening 14.
  • the pressure in segment 9 rises to a value very close to ambient pressure and the particles are no longer aspirated. It is therefore sufficient to program the successive durations of supply and interruption of the flow rate by operating the shutter 15. According to FIG. 5, the closure of the shutter occurs at time intervals t which are fixed and its opening after periods which depend on the required flow rate.
  • the same device can be programmed to play a role and prevent blockage of entry openings. Installations of the kind shown in fig. 1 in fact present, to a greater or lesser degree, the risk that a plug of tobacco particles will form at the inlet opening of the conduit 6, which interrupts the feeding. If such a plug forms at the lower opening of the sleeve 23, the vacuum inside the inlet segment 9, measured by the pressure sensor P increases, as can be seen in the graph in FIG. 3 which represents the curve giving the ordinate the value of the depression and the time abscissa, this same graph also giving the volumetric flow rate of tobacco V, represented on the ordinate with the time on the abscissa.
  • the vacuum increases and the volumetric flow decreases.
  • This phenomenon is detected by the sensor P if it reaches a certain magnitude, that is to say if the depression increases up to a value ⁇ PC representing the critical depression but before, that is to say during the phase increase in depression, the entire sleeve 23 is sucked up, so that the lower stop represented by the lower end of the slots 18 abuts against the rods 19.
  • this shock has the effect of releasing the plug which has formed, so that the vacuum ⁇ P returns to its normal value without having reached the critical value ⁇ PC.
  • the plug is such that it does not disintegrate spontaneously when the sleeve 23 abuts, by its lower stop, against the stop rods 19. Then the detection of the critical vacuum ⁇ PC causes the opening immediate shutter 15. Under these conditions, the vacuum drops to almost zero and the sleeve 23 falls back into its lower position as it is re presented in fig. 2. The upper end of the slots 18 then abuts on the rods 19 and this stop shock of the sleeve 23 undoubtedly disintegrates the plug which has formed.
  • the program of the control device can therefore ensure that after a time ⁇ T of for example 2 to 3 seconds, after the opening of the shutter 15, this shutter is closed. Normal flow operation will therefore resume immediately.
  • the feeding device presents less risks for the deterioration of the tobacco particles, therefore a reduced dust production and the energy expended in operating the blowers is also reduced, while the efficiency of use tobacco is increasing.

Landscapes

  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
EP90810178A 1989-03-22 1990-03-08 Automatische Steuervorrichtung zum Zuführen von Tabakteilchen zu einer Maschine Expired - Lifetime EP0390732B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH106889 1989-03-22
CH1068/89 1989-03-22

Publications (2)

Publication Number Publication Date
EP0390732A1 true EP0390732A1 (de) 1990-10-03
EP0390732B1 EP0390732B1 (de) 1994-08-10

Family

ID=4201695

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810178A Expired - Lifetime EP0390732B1 (de) 1989-03-22 1990-03-08 Automatische Steuervorrichtung zum Zuführen von Tabakteilchen zu einer Maschine

Country Status (3)

Country Link
US (1) US5000197A (de)
EP (1) EP0390732B1 (de)
DE (1) DE69011374T2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5322074A (en) * 1992-07-01 1994-06-21 The Cardwell Machine Company Tobacco delivery system
DE19533412C2 (de) * 1995-09-09 2003-08-07 Bat Cigarettenfab Gmbh Absauganlage zur Entnahme von in einem Vorratsbehälter befindlichem Schnitttabak
DE10238946A1 (de) * 2002-08-24 2004-03-04 Mann + Hummel Protec Gmbh Fördervorrichtung für schüttfähiges Gut
CN104816948B (zh) * 2015-04-30 2017-10-24 华北电力大学 一种用于气力输送粉体参数测量的光学探头防污装置
CN108636949B (zh) * 2018-04-10 2021-02-02 红云红河烟草(集团)有限责任公司 一种风力送料系统堵管检测自动疏通方法及系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB773835A (en) * 1954-06-04 1957-05-01 Kurt Koerber Method and device for facilitating control of the feed of tobacco to cigarette-making machines
GB2139870A (en) * 1983-05-19 1984-11-21 Hauni Werke Koerber & Co Kg Apparatus for supplying particulate material to tobacco processing machines and the like
DE3642085A1 (de) * 1986-05-27 1987-12-03 Engelbrecht & Lemmerbrock Pneumatischer foerderer fuer landwirtschaftliche langgueter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1133550B (it) * 1980-11-21 1986-07-09 Cir Spa Divisione Sasib Dispositivo per impedire intasamenti nel condotto di trasferimento pneumatico del trinciato dal distributore alla linea di formazione del cordone di tabacco nelle confezionatrici di sigarette

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB773835A (en) * 1954-06-04 1957-05-01 Kurt Koerber Method and device for facilitating control of the feed of tobacco to cigarette-making machines
GB2139870A (en) * 1983-05-19 1984-11-21 Hauni Werke Koerber & Co Kg Apparatus for supplying particulate material to tobacco processing machines and the like
DE3642085A1 (de) * 1986-05-27 1987-12-03 Engelbrecht & Lemmerbrock Pneumatischer foerderer fuer landwirtschaftliche langgueter

Also Published As

Publication number Publication date
EP0390732B1 (de) 1994-08-10
DE69011374T2 (de) 1995-03-23
US5000197A (en) 1991-03-19
DE69011374D1 (de) 1994-09-15

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