US3812768A - Method and device for producing a cigarette filter unit - Google Patents

Method and device for producing a cigarette filter unit Download PDF

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Publication number
US3812768A
US3812768A US00271639A US27163972A US3812768A US 3812768 A US3812768 A US 3812768A US 00271639 A US00271639 A US 00271639A US 27163972 A US27163972 A US 27163972A US 3812768 A US3812768 A US 3812768A
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US
United States
Prior art keywords
cover strip
filter elements
filter
heating
tube
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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
US00271639A
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English (en)
Inventor
C Burrus
S Boegli
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Burrus et Cie
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Burrus et Cie
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Application filed by Burrus et Cie filed Critical Burrus et Cie
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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • A24D3/0212—Applying additives to filter materials
    • A24D3/0225—Applying additives to filter materials with solid additives, e.g. incorporation of a granular product

Definitions

  • ABSTRACT The invention relates to a method and a device for producing a cigarette filter unit wherein an external cover strip eventually shaped as a tube, is glued around the entire periphery of filter elements which are spaced and aligned axially within said tube, fluent filter material being disposed between adjacent pairs of filter elements within the tube.
  • the present invention relates to a method and a device for producing a cigarette filter unit having sections of fibrous and fluent filter material arranged alternately within an external tube.
  • the object of the present invention is to create a method which does not have this drawback.
  • the method in accordance with the invention is characterized in that a series of filter elements uniformly spaced apart from each other and aligned axially in respect of each other are continuously attached on a continuously supplied mouthpiece cover strip which is coated on the side which comes into contact with the filter elements by a thermoplastics plastics material, by
  • thermoplastics plastics coating by means of a first heating device, after which the filter elements and the cover strip are moved, with a view to the formation of chambers which are located between the filter elements and provided with a supply aperture, past a filling member which is provided with at least one filling aperture, a specific quantity of fluent filter material being poured out of the filling member into the chambers located between the filter elements, the edges of the cover strip then being made to overlap with the result that the cover strip forms a closed tube, completely enclosing the filterelements and the fluent filter material, after which the cover strip is connected over the whole periphery of the filter elements with the latter by means of softening the thermoplastics plastics coating by means of a second heating device.
  • the present invention further provides a device for carrying out the method in accordance with the invention which is characterized in that it has a guide device which shapes the cover strip to form a tube which completely encloses the filter elements and the chambers located between them which are filled with fluent filter material in such a way that the edges of the cover strip overlap one another, and a sealing device provided with an element which is adapted to be heated and to be placed on the tube which is to be sealed with a view to connecting to each other the edges of the cover strip which overlap one another, by the fact that the heatable element is provided with a guide channel which is at least approximately semicircular in shape seen in cross-section, and whose radius of curvature corresponds to the external radius of the tube to be produced, in the fact that there is provided directly behind the guide channel of the heatable element a further analogous guide channel of a cooling member adapted to be placed on the tube with a view to setting the heatsoftened adhesive and a further heatable element located, seen along the direction of movement of the tube which is to be sealed, behind
  • the means for attaching the individual filter elements on the cover strip comprise a heating element which is adapted to move towards and away from the side of the cover strip remote from the filter elements, and that an adjusting mechanism is provided to bring the heating element so close to the cover strip when the latter is moved forwards that an adhesive which is located on the cover strip and softens under the influence of heat is softened at least locally, and when the cover strip is stationary moves it so far from the latter that the cover strip is not damaged by the heat radiating from the heating element.
  • FIG. 1 a diagrammatic side view of a device for producing a cigarette filter unit
  • FIG. 2 a section along the line Il-Il in FIG. 3. through the filling part;
  • FIG. 3 a section along the line IIIIII in FIG. 2;
  • FIG. 4 a section on an enlarged scale along line IV-lV in FIG. 2;
  • FIG. 5 a section along line V-V in FIG. 1 to show the attachment part
  • FIG. 6 a section along line VI-VI in FIG. 1 to show the upper welding part
  • FIG. 7 a section along line VII-VII in FIG. I to show the cooling part
  • FIG. 8 a section along line VIII-VIII in FIG. 1 to show the lower welding part.
  • the supply means for the continuous supply of a series of cylindrical filter elements l and 2 made of fibrous material, separated at uniform distances from each other and aligned axially in respect of each other on to a continuously supplied mouthpiece cover strip 3 have for example a machine 4, which is referred to in the cigarette industry as D.A .P.T.C.-machine made by Molins and is described in more detail in US. Pat. specification No. 2,957,285.
  • This machine 4 is provided with two storage containers 5 for storing cylindrical filter material pieces made for example from cellulose and acetate and two rotatable cylinders 6 to receive the latter.
  • the machine 4 is driven via the chain drive 7.
  • Cylinders 6 are provided along their periphery with grooves running parallel to their axes of rotation to receive the pieces of filter material and have a specific number of radially running grooves into which rotatable knives engage with a view to subdividing the rodshaped pieces of filter material into the smaller filter elements' l and 2.
  • the cylinders 6 pass the latter to a transport and distancing device 8, which moves the filter elements 1 and 2 forwards in the direction of the arrow 9 alternating with each other and axially aligned and simultaneously creates equal distances between them.
  • T he filter elements 1 and 2 which are at a uniform of each other are continuously supplied to a mouth- 1, piece cover strip 3 which is continuously supplied in like manner, placed on the latter and, as can be seen from FIG. 5, guided in a lateral direction through the guide parts and 1 1 and kept, by means of a clamping strip 12 which is arranged above the mouthpiece cover srip 3 and rotates synchronous thereto in their positions relative to each other.
  • the mouthpiece cover strip 3 is coated on the side facing the filter elements 1 and 2 with an adhesive which can be softened by heat, such as for example a thermoplastics plastics material, so that it is possible to attach the individual filter elemtns 1 and 2, immediately after they have been transferred on to the cover strip 3, to the latter with the help of a heating element 13 and thus to render impossible relative displacements towards each other, in other words a change in the distance between them.
  • the mouthpiece cover strip 3, as can be seen from FIG. 5, rests on a support member 14, and the heating element 13 is adapted to be pressed from below through a slotted aperture in the support member 14 against the cover strip 3 and therefore indirectly. against the filter elements 1 and 2 which are to be attached.
  • the temperature of the heating element 13 is preferably thermostatically controlled.
  • the arrangement of the heating element 13 is such that when the cover strip 3 is stationary, it is lifted off from the latter in order to prevent the latter burning.
  • This can be effected by any suitable means such as by arranging the heating element 13 for pivotal movement about an axle '50, an electromagnet 51 being used to raise the heating element into contact with the underside of the cover strip 3 against a counterforce exerted by compression spring 52 which serves to withdraw the heating element away from the cover strip 3 when the electromagnet 51 is deenergized.
  • An adjustable stop 53 can be provided to. determine the distance that the heating element 13 is raised.
  • cover strip 3 After the individual filter elements 1 and 2 have been attached on the cover strip 3 the latter is led on to an endless conveyor belt 15 and these parts then arrive together in a guide rail which acts as a shaping member, where the cover strip 3 is placed around the filter elements 1 and 2 which are attached to it in at least approximately U-shape during its forward movement.
  • a filling part 16 which is shown in more detail in FIGS. 2, 3 and 4, said member serving to introduce fluent filter material, such as e.g. activated carbons, into the chambers 17 formed between the individual filter elements 1 and 2.
  • fluent filter material such as e.g. activated carbons
  • the chamstorage container 18 of the filling member 16 is connected on its downward-directed outlet side via a slidingmember 19 which rests on the filter elements land 2 and encloses them by at least 180 to a suction device 21 which, seen along the direction of movement of the cover strip 3, is housed in front of the filling aperture of thefilling member 16.
  • the width of the sliding member 19 corresponds approximately to the diameter of the filter elements 1 and 2 which are to be encased in the cover strip 3, side surfaces 19a and 1% (FIG. 4) of the slidingmember 19 running parallel to each other and to the direction of movement of the conveyor belt 15 and serve to provide a sealing structure of the surfaces 3a and 3b, which face in opposite directions, of the arms of the cover strip 3 which is in the shape of a U.
  • the limited chambers 17 are formed by the front edges of the filter elements 1 and 2, the cover strip 3 and the sliding surface of sliding member 19.
  • the distance between the suction aperture 22 located in the sliding surface and the filling aperture 20 is greater than the length a of the chambers 17 formed between the filter elements 1 and 2, with the result that during the forward movement of the latter these are completely enclosed in a practically air-tight manner between the suction aperture 22 and the filling aperture 20 as far as the filter elements 1 and 2, with the result that the suction arrangement 21 can evacuate these chambers through filter elements 1 and 2.
  • the arms of the U-shaped cover strip 3 are as a result of the underpressure prevailing in the chambers 17 pressed in practically air-tight manner against the side surfaces 19a and 19b of slide member 19.
  • the chambers which have been evacuated in this way then pass under the exit slot 20 of the storage container 18 which forms the filling aperture, whereupon the fluent filter material located in th latter is drawn in bursts into the chambers 17 emerging under the sliding surface.
  • the filling member 16 is provided with a vibrator 23, the effect of this being that the filling part 16 which is suspended in resilient manner on leaf springs 24 (FIG. 3) oscillates at Hz in a vertical plane.
  • a semicircular-shaped stipping edge 30 is provided at the end of the outlet slot 20 and this limits the crosssection of the filter elements 1 and 2 passing through and strips off surplus fluent filter material. As this stripping edge 30 is subjected to considerable wear while the device is in operation it is located in an exchangeable stripping section 31 which is'adapted to be inserted into the slide member 19.
  • the stripping member 31 is additionally provided on its underside with transverse grooves 31a which strip any grains of the fluent filter material which may still be found on the filter elements away from the latter, pick them up and pass them into the following chambers l7.
  • the lower part 32 of the storage container 18 is designed in the shape of a cylinder in which a scoop/trough-shaped closure member 33 is housed, this being adjacent to the inside of this cylinder-shaped part 32 and adapted to rotate around the longitudinal axis of the latter.
  • a closure device 37 is provided to connect the edges of the cover strip which are now overlapping each tween the outside of the filter elements and the inside of the cover strip and thence into the mouth of the smoker when the filters are attached to the cigarettes, which occurrence is very troublesome, it is important that the cover strip is glued to the filter elements over the whole of their periphery.
  • the heatable element 38 is provided with a guide channel 39 which is semicircular in shape when seen in cross-section, and whose radius of curvature corresponds to the external radius of the tube which is to be produced.
  • a further analogous guide channel 40 of a cooling member 41 which is adapted to be placed on to the tube is housed directly behind the guide channel 39 of the heatable element 38, in order to set the heat-softened plastics material (FIG. 7).
  • a further glueing device 43 is provided (FIGS. 1 and 8) behind the separating device 42, and its heating element 44 lies against the tube from below.
  • the guide channel 45 of this heating element has a semicircularshaped cross-section and connects the part of the cover strip 3 which has been shaped to form a tube which is not yet glued to filter elements 1 and 5, with the result that the latter are completely glued to the cover strip 3 over the whole of their periphery and no fluent filter material can escape from the chambers 17, between the filter element surfaces and the cover strip 3.
  • Endless, coiled rotating wires 46 exert pressure on the upper side of the tube sections.
  • the chambers of the filters are completely filled in this device, and the complete liberation of the filter element surfaces from fluent filter material and dust from filter materila by the stripping member 31 and the suction device 36 results in a clean cutting surface when the filter elements are separated by the separating device 51.
  • said second guide means including a substantially semicircular cooled surface whose radius of curvature corresponds to the desired outside radius of the tube and which contacts the surface portions thereof heated by said first guide means to solidify the heat-softened adhesive
  • said third guide means through which said tube is passed after leaving said second guide means, said third guide means including a substantially semi-circular adhesive softening heating surface contacing the lower half of said tube and which serves to adhere the remaining non-joined surface portions thereof to the corresponding surface portions of said filter elements.
  • said means for heating the central portion of said traveling cover strip includes a heating element mounted for movement towards and away from the side of the cover strip remote from the fibrous filter elements, and an adjustment mechanism for bringing said heating element close to the cover strip when the latter is traveling so as to soften the adhesive surface in contact with the filter elements, and for moving said heating element away from said cover strip when the latter is stationary thereby to prevent damage to said cover strip by the heat radiated from said heating element.

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  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
US00271639A 1971-07-16 1972-07-14 Method and device for producing a cigarette filter unit Expired - Lifetime US3812768A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1046471A CH526277A (de) 1971-07-16 1971-07-16 Verfahren zur Herstellung einer Zigarettenfiltereinheit und Einrichtung zur Durchführung des Verfahrens

Publications (1)

Publication Number Publication Date
US3812768A true US3812768A (en) 1974-05-28

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ID=4363510

Family Applications (1)

Application Number Title Priority Date Filing Date
US00271639A Expired - Lifetime US3812768A (en) 1971-07-16 1972-07-14 Method and device for producing a cigarette filter unit

Country Status (10)

Country Link
US (1) US3812768A (de)
JP (1) JPS5412560B1 (de)
CA (1) CA956198A (de)
CH (1) CH526277A (de)
CS (1) CS174837B2 (de)
DE (1) DE2138949A1 (de)
FR (1) FR2146761A5 (de)
GB (1) GB1346536A (de)
IT (1) IT962540B (de)
NL (1) NL7209771A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4281591A (en) * 1977-04-04 1981-08-04 F. J. Burrus & Cie. Production of cigarette filter units
US11078024B2 (en) * 2019-07-30 2021-08-03 Kleemann Gmbh Rock processing machine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3957563A (en) * 1974-02-22 1976-05-18 Brown & Williamson Tobacco Corporation Method and apparatus for the manufacture of filter rods containing particulate material by a split rod technique
DE2555129C3 (de) * 1975-12-08 1979-10-18 Baumgartner Papiers Sa Zigarettenfiltereinheit und Einrichtung zur Herstellung derselben
GB1576212A (en) * 1976-06-19 1980-10-01 Molins Ltd Apparatus for feeding wrapper material
PL223115B1 (pl) 2013-02-15 2016-10-31 Int Tobacco Machinery Poland Spółka Z Ograniczoną Odpowiedzialnością Sposób, mechanizm i urządzenie do chwilowego kompresowania materiału filtracyjnego

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3357321A (en) * 1965-07-08 1967-12-12 Liggett & Myers Tobacco Co Apparatus and process for making multisectional filter tips for cigarettes
US3400032A (en) * 1965-02-03 1968-09-03 Brown & Williamson Tobacco Filter rod making machine
US3482488A (en) * 1968-01-12 1969-12-09 Brown & Williamson Tobacco Multiple filter manufacture

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3400032A (en) * 1965-02-03 1968-09-03 Brown & Williamson Tobacco Filter rod making machine
US3357321A (en) * 1965-07-08 1967-12-12 Liggett & Myers Tobacco Co Apparatus and process for making multisectional filter tips for cigarettes
US3482488A (en) * 1968-01-12 1969-12-09 Brown & Williamson Tobacco Multiple filter manufacture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4281591A (en) * 1977-04-04 1981-08-04 F. J. Burrus & Cie. Production of cigarette filter units
US11078024B2 (en) * 2019-07-30 2021-08-03 Kleemann Gmbh Rock processing machine

Also Published As

Publication number Publication date
CS174837B2 (de) 1977-04-29
FR2146761A5 (de) 1973-03-02
GB1346536A (en) 1974-02-13
DE2138949A1 (de) 1973-02-01
IT962540B (it) 1973-12-31
CH526277A (de) 1972-08-15
CA956198A (en) 1974-10-15
NL7209771A (de) 1973-01-18
JPS5412560B1 (de) 1979-05-23

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