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EP1456625A2 - Procede et dispositif pour detecter une propriete d'un papier a cigarettes - Google Patents

Procede et dispositif pour detecter une propriete d'un papier a cigarettes

Info

Publication number
EP1456625A2
EP1456625A2 EP02779573A EP02779573A EP1456625A2 EP 1456625 A2 EP1456625 A2 EP 1456625A2 EP 02779573 A EP02779573 A EP 02779573A EP 02779573 A EP02779573 A EP 02779573A EP 1456625 A2 EP1456625 A2 EP 1456625A2
Authority
EP
European Patent Office
Prior art keywords
cigarette paper
angle
radiation
incidence
property
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.)
Withdrawn
Application number
EP02779573A
Other languages
German (de)
English (en)
Inventor
Dierk SCHRÖDER
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.)
Koerber Technologies GmbH
Original Assignee
Hauni Maschinenbau GmbH
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 Hauni Maschinenbau GmbH filed Critical Hauni Maschinenbau GmbH
Publication of EP1456625A2 publication Critical patent/EP1456625A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/59—Transmissivity
    • 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
    • A24C5/005—Treatment of cigarette paper

Definitions

  • the invention relates to a method for detecting a property of cigarette paper, for example a coating of the cigarette paper, in which the cigarette paper is irradiated from one side at a certain angle of incidence to the cigarette paper with electromagnetic radiation, which is measured on the other side of the cigarette paper, and the property of the cigarette paper is detected on the basis of the measured radiation.
  • the invention further relates to a device for detecting a property of cigarette paper, with a radiation source in order to irradiate the cigarette paper with electromagnetic radiation from one side at a specific angle of incidence to the cigarette paper, with a detector to measure radiation emerging on the other side of the cigarette paper, with an evaluation circuit to detect the property of the cigarette paper based on the measured radiation.
  • Cigarette paper is to be understood as all papers of the tobacco processing industry, for example covering paper, filter wrapping paper, inside or outside wrapping paper for cigarette packs or cigarette paper.
  • US Pat. No. 6,130,438 discloses a cigarette manufacturing machine with an optical system using the transmitted light method for detecting errors in the cigarette paper and for ejecting cigarettes produced therefrom.
  • the optical system uses lasers, the corresponding photodiodes are located frontally, the cigarette paper being passed through between the diodes to be illuminated. The edge area of the cigarette paper is not detected or is detected with an auxiliary device.
  • WO 99/02051 which corresponds to US Pat. No. 6,020,969 and EP 1 011 351 A1 shows a system for producing cigarettes with a sensor that detects strips in the cigarette paper, detects defects in the cigarette paper and ejects the defective cigarettes.
  • the method described in the publication works on the principle that infrared light from a light-emitting diode is reflected from the surface of the cigarette paper and is detected by a light-sensitive receiver.
  • DE 20 43 876 describes an arrangement for detecting errors in transparent webs, in which a travel beam consisting of polarized light scans the web.
  • a travel beam consisting of polarized light scans the web.
  • a light receiving device which receives light when the polarization plane rotates defects of the web rotate the polarization plane of the light.
  • the object of the present invention is to improve a method and a device of the type mentioned at the outset. This object is achieved according to the invention by a method according to claim 1 and a device according to claim 12.
  • the advantages of the invention are, in particular, that a property of the cigarette paper, for example a coating of the cigarette paper, can be recognized without any doubt, whereas it is not necessary for an optimal quality of the measurement due to the transmitted light method used that the angle of incidence of the light beam is equal to a reflection angle of the Beam of light. In comparison to a measurement in reflection in the device according to the invention or when carrying out the method according to the invention, therefore, less adjustment effort is required for a clear measurement result.
  • the invention encompasses the knowledge that coated areas of cigarette paper have a higher reflection coefficient than uncoated areas, so that coated areas transmit less light than uncoated areas.
  • the light can also be polarized. This increases the contrast between coated and uncoated areas, particularly in the case of linear polarization parallel to the surface of the cigarette paper.
  • the presence of the coating can be recognized on the other side on the basis of changes in intensity that then occur.
  • due to the transmitted light method used it does not matter in the case of which side the cigarette paper is illuminated for carrying out the measurement, which in turn facilitates the installation of the measuring apparatus in a cigarette rod machine.
  • the above-mentioned coating which is advantageously applied periodically in strips in the direction transverse to the longitudinal direction of the cigarette paper, can consist, for example, of cellulose or silicate.
  • the coating serves, for example, as a so-called fire stop to let the cigarette go out if it is accidentally left unattended. Because less air gets through the cigarette paper at the coated areas, so that the burning process in the cigarette suffocates at the coated areas. In this way, a fire that may have been caused by leaving the bed unattended may be prevented.
  • a particularly good contrast in the intensity of the light passing through the cigarette paper between coated and uncoated areas of the cigarette paper when carrying out the method according to the invention or in the device according to the invention results from a measurement with an incidence angle of approximately 15 ° to the surface of the cigarette paper.
  • the emerging light is also detected at a certain angle, preferably at an angle between 70 ° and 90 ° to the surface of the cigarette paper. This also reinforces the difference in the intensity of the light passing through the cigarette paper between coated and uncoated areas of the cigarette paper.
  • the contrast can be further enhanced by using polarized light, preferably linearly parallel to the surface of the cigarette paper.
  • FIG. 1 shows a cigarette rod machine in a perspective view with an embodiment of a device according to the invention.
  • FIG. 2 shows a schematic illustration of the functioning of the embodiment according to FIG. 1;
  • Fig. 3 is a graphical representation of a typical intensity curve detected by the photosensitive element of Fig. 2.
  • Fig. 1 shows a cigarette rod machine in a perspective view with an embodiment of a device according to the invention.
  • the structure and operation of the cigarette rod machine is as follows: A pre-distributor 2 is charged with tobacco in portions from a lock 1. A removal roller 3 of the pre-distributor 2, in a controlled manner, supplements a storage container 4 with tobacco, from which a steep conveyor 5 removes tobacco and feeds a storage shaft 6 in a controlled manner.
  • a pin roller 7 removes a uniform tobacco flow from the stowage shaft 6, which is knocked out of the pins of the pin roller 7 by a knockout roller 8 and hurled onto a scattering cloth 9 rotating at a constant speed.
  • a tobacco fleece formed on the scattering cloth 9 is thrown into a classifying device 11, which essentially consists of an air curtain through which larger or heavier parts of tobacco pass, while all other tobacco particles are airborne into a funnel 14 formed by a pin roller 12 and a wall 13 be directed. From the pin roller 12, the tobacco is thrown into a tobacco duct 16 against a strand conveyor 17, on which the tobacco is held by means of air sucked into a vacuum chamber 18 and a tobacco rod is expanded.
  • a leveler 19 removes excess tobacco from the tobacco rod, which is then placed on a cigarette paper strip 21 guided in synchronism.
  • the cigarette paper strip 21 is pulled off a bobbin 22, passed through a printing unit 23 and placed on a driven format belt 24.
  • the format tape 24 transports the tobacco rod and the cigarette paper strip 21 through a format 26 in which the cigarette paper strip 21 is folded around the tobacco rod, so that an edge protrudes which is glued in a known manner by a glue apparatus (not shown).
  • the adhesive seam is then closed and dried by a tandem seam plate 27.
  • the cigarette paper strip 21 is passed through a device 20.
  • the device 20 detects whether the cigarette paper strip 21 has a coating. The device 20 is described in more detail below with reference to FIGS. 2 and 3.
  • a cigarette rod 28 formed in this way passes through a rod density measuring device 29, which controls the equalizer 19, and is cut into double-length cigarettes 32 by a knife apparatus 31.
  • the double-length cigarettes 32 are transferred from a transfer device 34 having controlled arms 33 to a transfer drum 36 of a filter attachment machine 37, on the cutting device of which drum 38 they are divided into single cigarettes with a circular knife.
  • Conveyor belts 39, 41 convey excess tobacco into a container 42 arranged under the storage container 4, from which the recycled tobacco is removed again by the steep conveyor 5.
  • FIG. 2 shows the device 20 of FIG. 1 in a schematic illustration.
  • the device 20 works in the transmitted light method.
  • it has a laser 40, which is arranged on one side of the cigarette paper strip 21 and serves as a radiation source.
  • the light 40a originating from the laser 40 is imaged on one side 42 of the cigarette paper strip 21 by means of focusing optics 41 which have an optical axis 40b.
  • the light 40a is linearly polarized parallel to the surface 42 by means of a polarization filter 44 arranged on the optical axis 40b and serving as a polarization device.
  • angle ⁇ 15 ° between the surface 42 and the optical axis 40b.
  • other angles 0 ° ⁇ ⁇ 75 ° are also possible.
  • the light 40a strikes the side 42 of the cigarette paper strip 21, which is provided with a coating 46.
  • the cigarette paper strip 21 can also be guided such that the light 40a strikes the uncoated side 48.
  • the coating 46 consists of paper strips 52 which are periodically applied to the surface 42 of the cigarette paper strip 21 and extend transversely to the longitudinal direction of the cigarette paper strip 21.
  • the strips 52 can also consist of another material, for example of silicate.
  • the cigarette paper strip 21 moves at a speed v through the irradiation area 50 of the light 40a. In the situation shown in FIG. 2, the cigarette paper strip 21 is located with a strip 52 in the irradiation area 50.
  • a photosensitive element 54 serving as a detector is arranged on the side of the cigarette paper strip 21 opposite the laser 40.
  • the photosensitive element 54 also detects via focusing optics 56
  • An optical axis 57 is the intensity of the light 58 passing through the cigarette paper strip 21.
  • the photosensitive element 54 measures a different intensity I, i.e. If the coating 46 is present, a lower intensity I is measured than if the surface 42 is uncoated. In accordance with the change in intensity, the photosensitive element 54 emits an alternating electrical signal 60 to an evaluation circuit 62.
  • the amplitude of the electrical signal 60 corresponding to the intensity I is shown in FIG. 3 over the time t when the cigarette paper strip 21 moves through the irradiation area 50. A low amplitude corresponds to a coated area, while a high amplitude corresponds to an uncoated area.
  • the evaluation circuit 62 can have a memory for storing a predetermined period of the change in the intensity I and compare this stored value for checking with the currently measured value.
  • the evaluation circuit 62 can be provided with a memory for storing a table in which at least one extent of a change is associated with a specific material, for example cellulose, from which the coating 46 can be constructed.
  • the evaluation circuit 62 can be designed to determine an average value of the intensities I over a predetermined period of time, to determine a current extent a of the change relative to the average value and to recognize from the table which coating, that is to say cellulose, for this Extent a heard. Because different coatings result in different intensity changes.
  • the polarization of the light 40a amplifies the change a in comparison to a transillumination of the cigarette paper strip 21 with unpolarized light.

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Paper (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

L'invention concerne un procédé pour détecter une propriété d'un papier à cigarettes (21), comprenant les étapes suivantes : un côté (42) du papier à cigarettes (21) est exposé à un rayonnement électromagnétique (40a) présentant un angle d'incidence déterminé (α) par rapport au papier à cigarettes (21) ; le rayonnement (58) sortant de l'autre côté (48) du papier à cigarettes (21) est mesuré ; la propriété du papier à cigarettes (21) est détectée au moyen du rayonnement mesuré (58). L'invention est caractérisée en ce que l'angle incident (α) sélectionné est compris entre 0° et 75°.
EP02779573A 2001-12-07 2002-11-27 Procede et dispositif pour detecter une propriete d'un papier a cigarettes Withdrawn EP1456625A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10160235 2001-12-07
DE10160235A DE10160235A1 (de) 2001-12-07 2001-12-07 Verfahren und Vorrichtung zur Erfassung einer Eigenschaft von Zigarettenpapier
PCT/EP2002/013339 WO2003048747A2 (fr) 2001-12-07 2002-11-27 Procede et dispositif pour detecter une propriete d'un papier a cigarettes

Publications (1)

Publication Number Publication Date
EP1456625A2 true EP1456625A2 (fr) 2004-09-15

Family

ID=7708431

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02779573A Withdrawn EP1456625A2 (fr) 2001-12-07 2002-11-27 Procede et dispositif pour detecter une propriete d'un papier a cigarettes

Country Status (5)

Country Link
US (1) US20040216755A1 (fr)
EP (1) EP1456625A2 (fr)
AU (1) AU2002342923A1 (fr)
DE (1) DE10160235A1 (fr)
WO (1) WO2003048747A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050172977A1 (en) * 2004-02-10 2005-08-11 Paul Jadot Low ignition propensity (lip) paper smoking articles
DE102004020776B4 (de) * 2004-04-27 2007-03-08 Hauni Primary Gmbh Verfahren und Einrichtung zur Fremdkörperabscheidung aus einem Materialstrom
DE202009012142U1 (de) 2009-09-07 2011-02-03 Sick Ag Optoelektronischer Sensor zur Streifenerkennung
GB201522848D0 (en) * 2015-12-23 2016-02-03 British American Tobacco Co Apparatus for detecting the presence of adhesive
DE102018100499A1 (de) 2018-01-11 2019-07-11 Hauni Maschinenbau Gmbh Vorrichtung und Verfahren der Tabak verarbeitenden Industrie mit einer Beleuchtungsvorrichtung zum optischen Prüfen von stabförmigen Artikeln

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4845374A (en) * 1987-07-20 1989-07-04 R. J. Reynolds Tobacco Company Method and apparatus for detecting the deposition of an adhesive on a travelling web
DE3728705A1 (de) * 1987-08-28 1989-03-09 Agfa Gevaert Ag Vorrichtung zur ueberpruefung von beschichteten und unbeschichteten folien
DE4008475C2 (de) * 1990-03-16 2002-10-10 Hauni Werke Koerber & Co Kg Verfahren und Vorrichtung zum Herstellen von Filterzigaretten
IT1247904B (it) * 1990-03-23 1995-01-05 Koerber Ag Procedimento e disposizione per formare un filone di fibre di tabacco
JPH10160687A (ja) * 1996-11-29 1998-06-19 Canon Inc シート材材質判別装置及び画像形成装置
US6020969A (en) * 1997-07-11 2000-02-01 Philip Morris Incorporated Cigarette making machine including band inspection
JP3372193B2 (ja) * 1997-08-20 2003-01-27 日本たばこ産業株式会社 シガレット製造装置
DE19913924A1 (de) * 1999-03-26 2000-09-28 Voith Sulzer Papiertech Patent Vorrichtung und Verfahren zum Bestimmen der Faserorientierung in Faserstoffbahnen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03048747A2 *

Also Published As

Publication number Publication date
AU2002342923A8 (en) 2003-06-17
US20040216755A1 (en) 2004-11-04
WO2003048747A3 (fr) 2004-02-19
AU2002342923A1 (en) 2003-06-17
DE10160235A1 (de) 2003-06-26
WO2003048747A2 (fr) 2003-06-12

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