US3590827A - Filtration device for cigarettes - Google Patents

Filtration device for cigarettes Download PDF

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Publication number
US3590827A
US3590827A US704333A US3590827DA US3590827A US 3590827 A US3590827 A US 3590827A US 704333 A US704333 A US 704333A US 3590827D A US3590827D A US 3590827DA US 3590827 A US3590827 A US 3590827A
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United States
Prior art keywords
wall
openings
tobacco
transverse wall
mouth
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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
US704333A
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English (en)
Inventor
Peter E Brudy
Otto H Brudy
Joseph E J Habowsky
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.)
JOSEPH E J HABOWSKY
OTTO H BRUDY
Original Assignee
JOSEPH E J HABOWSKY
OTTO H BRUDY
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.)
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Publication of US3590827A publication Critical patent/US3590827A/en
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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
    • A24D3/04—Tobacco smoke filters characterised by their shape or structure
    • A24D3/045—Tobacco smoke filters characterised by their shape or structure with smoke acceleration means, e.g. impact-filters

Definitions

  • This invention relates to filtration devices for cigarettes. Although it is suitable for cigarette holding devices, it is primarily intended for incorporation into cigarettes at the time of manufacture.
  • a filtering device which will efficiently remove the detrimental substances from the tobacco smoke, which has a low-pressure drop resulting in an easy draw, which is relatively simple and inexpensive to manufacture, which does not substantially increase the total weight of the cigarette, which can be readily modified to vary the retention of the detrimental substances and which does not significantly. affect the tobacco taste or the distinguishable taste of a particular tobacco blend.
  • FIG. 2 is a longitudinal sectional view of a modified form of the filtration device.
  • FIG. 3 is a partly diagrammatic fragmentary sectional view on an enlarged scale of the device shown in FIG. 2.
  • FIG. 4 is a longitudinal sectional view on an enlarged scale of a further modified form of the filtration device.
  • FIG. 5 is a partly diagrammatic fragmentary sectional view on an enlarged scale of a portion of the device shown in FIG. 4.
  • FIG. 6 is a longitudinal sectional view on an enlarged scale of a further modified form of the filtration device.
  • FIG. 7 is a partly diagrammatic fragmentary sectional view on an enlarged scale of a portion of the device shown in FIG.
  • FIG. 8 is a longitudinal sectional view on an enlarged scale of a further modified form of the filtration device.
  • FIG. 9 is a plan view of a further modified form of the filtration device.
  • FIG. I In describing the principle by which the present invention functions in all of its various embodiments, reference is made to FIG. I.
  • the filtration device 10 is shown as applied to a cigarette II by being encased by the mouthpiece I2 so that it is interposed between the tobacco l3 and the mouth of the user.
  • the filtering device 10 comprises a cylinder I4 and a transverse wall 15 at a right angle to the wall 14.
  • the transverse wall 15 is made ofa preferably thin material, with a thickness on the order of 0.01 5 inches or less, such as aluminum foil.
  • the foil is provided with a plurality of circumferentially spaced openings 16 formed in a suitable manner such as piercing, punching, molding or the like, adjacent the surface 17 of the circumferential wall 14.
  • the openings 16 are positioned toward the wall 14 and have their axes at an angle to the flat transverse wall 15, preferably on the order of 5 to 55.
  • the openings 16 also converge in the direction away from the tobacco and toward the mouthpiece; that is, toward the surface 17.
  • the size of the openings or perforations at the small end are on the order of 0.005 to 0.045 inches.
  • the center of each opening 16 at the small end is preferably between 0.005 and 0.060 inches from the surface I7 ofwall I4.
  • the smoke passes through the openings I6 and is gradually compressed by the tapered surfaces of the openings I6 and is impinged upon the surface 17 of the wall 14. In this fashion the smoke is accelerated in its travel and the detrimental particles in the smoke are deposited on the surface 17 and the gases pass on to the mouth of the user.
  • the particles deposited are in the form of tars and the like and serve to produce an adhesive surface on the surface of surface 17 of the wall 14 which not only facilitates deposit of further particles but also provides an aromating of the passing smoke gases.
  • the greater the accumulation on the surface 17 the more efficient the filtration becomes due to this adhesive action. This can be proven by smoking several cigarettes through a holder in which the device is incorporated.
  • the smoke follows the herein described path as it travels from the tobacco to the mouth of the smoker.
  • the smoke enters the filtration device 10 it is gradually compressed as it flows through the restrictive openings 16 of the transverse wall 15. After this compression, which effects a considerable acceleration upon the smoke, an impingement of the smoke against the surface 17 of the peripheral wall I4 takes place. If this surface I7 is slightly roughened in texture or treated with adhesive during the manufacturing process, the depositing of materials due to the impingement will be greatly enhanced. Treated or not, this surface will collect a considerable quantity of tarry matter with the first puff on the cigarette, producing an adhesive surface which will provide for more efficient collection during subsequent puffs.
  • the trapped materials remain on the wall surface 17 and the smoke gases which subsequently pass over this residue are aromated with the flavor characteristics of the particles. Consequently, the gases which pass onto the mouth of the smoker have a flavor which is identical to the smoke when particulated; the only difference is a noticeable mildness caused by removal of the generally irritating smoke particles.
  • the openings 16 in the transverse wall 15 approach the peripheral wall 14 at an angle, and subsequently provide an angular" type of impingement which is significantly lower in pressure drop than direct or straight on types of impingement.
  • the filtering device 20 is made from a single piece plastic element such as polyethylene having a cylindrical wall 21 and a transverse wall 22 in which the openings 23, corresponding to the openings 16 in FIG. I are formed.
  • FIG. 3 shows the bottom portion of the device shown in FIG. 2 on a greatly enlarged scale.
  • the filtration device 25 shown in FIGS. 4 and 5 comprises a cylindrical wall 26 and an arcuate transverse wall 27 which has an outer convex surface 28 adjacent to the mouth of the user and an opposite concave surface 29.
  • Circumferentially spaced openings 30 which are positioned at a distance comparable to the device shown in FIG. I from the surface 31 circumferentially in the wall are tapered toward the wall in the same manner as the previously described filtrationdevice
  • the angle that the axes of the openings 30 forms with a diametral plane is within the same range as the angle of the openings 16 in FIG. I to the transverse wall 15, namely, 5 to 55.
  • the filtration device 35 comprises a cylindrical wall 36, and a transverse wall 37 at a right angle to the wall 36.
  • an integral extension 38 is positioned centrally of the device 35 and extends in the direction toward the mouth of the user to define a cylindrical surface 39.
  • the openings 40 in the wall 37 are tapered and of a size as is in the previous form of the invention and at an angle to the wall 37 as in the previous form of the invention except that they extend radially inwardly to impinge the smoke against the surface 39.
  • the filtration device 45 has a transverse wall 46 with openings 47 therein and a frustoconical projection 48 that has a surface 49 at an angle less than 90 to the transverse wall 46 against which the smoke is impinged.
  • the axes of the openings 23 are directed circumferentially generally radially as shown in order to provide a spiral action which serves to increase the area on which the impingement may take place.
  • An important feature of the device embodying the invention is the fact that it may be controlled in all of its features. More specifically, the retention of materials, the pressure drop of the device, the level of taste yielded by the device, and numerous other basic requirements of an acceptable filtration device can be accurately determined by the controlled variation of the component sections of the device, such as the size of openings, the spacing of the openings, the number of openings, the axial length of the openings, the angulation of the openings, the circumferential inclination of the openings and numerous other specifications such as materials and surface finishes.
  • the number of holes directly affects the overall pressure drop of the device when all other features remain the same. The more openings there are the lower the pressure drop, but the efficiency also decreases with the lower pressure requirement.
  • the size of the perforations or openings has a direct bearing upon efficiency and pressure drop, with the prime size usually yielding the lowest pressure dropwith the highest possible retention. However, in some instances, a lower pressure drop is desireable as is a lower efficiency.
  • the degree of taper also directly affects the pressure drop and the retention, although not drastically.
  • the length of the perforations is very important since it combines with the wall spacing to provide proper impingement. This length must be at least 0.005 inches, and so usually rises out from the bulk flatness of the transverse wall.
  • the thickness of the transverse wall is unimportant as long as it does not affect the length of the. perforation. it has its importance in the control ofthe weight ofthe device.
  • the angle between the axes of the openings and the transverse wall, the angle of the transverse wall to the peripheral wall and the subsequent angular relationship of the opening to the impingement surface greatly affect the retention, the pressure drop, the aromation of the passing gases and especially the ease of fabrication.
  • a filtration device for use with cigarettes, between the tobacco and the mouth of the user, said device being adapted to be encased within the mouthpiece of a cigarette, the combination comprising a transverse wall of impervious material,
  • transverse wall having a plurality of circumferentially spaced openings therein adjacent the circumferential axially extending wall
  • each said opening having its axis at an angle to the axis of the peripheral wall and extending toward the peripheral wall
  • each said opening having sidewalls converging in a direction toward the peripheral wall
  • transverse wall being generally flat and forms an angle of to the circumferential wall.
  • a filtration device for use with cigarettes, between the tobacco and the mouth of the user, said device being adapted to be encased within the mouthpiece of a cigarette, the combination comprising,
  • transverse wall having a plurality of circumferentially spaced openings therein adjacent the circumferential axially extending wall
  • each said opening having its axis at an acute angle to the axis of the peripheral wall and extending toward the peripheral wall
  • each said opening having sidewalls converging in a direction toward the peripheral wall
  • the axes of said openings are inclined circumferentially to produce a spiral action of the smoke passing therethrough.

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  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
US704333A 1968-02-09 1968-02-09 Filtration device for cigarettes Expired - Lifetime US3590827A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US70433368A 1968-02-09 1968-02-09

Publications (1)

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US3590827A true US3590827A (en) 1971-07-06

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US704333A Expired - Lifetime US3590827A (en) 1968-02-09 1968-02-09 Filtration device for cigarettes

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US (1) US3590827A (enExample)
GB (1) GB1231564A (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4253508A (en) * 1979-01-19 1981-03-03 Bodai Industries, Inc. Selective filtering of tobacco smoke by enhanced filtration efficiency
US4347983A (en) * 1979-01-19 1982-09-07 Sontek Industries, Inc. Hyperbolic frequency modulation related to aero/hydrodynamic flow systems

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US732252A (en) * 1902-11-04 1903-06-30 William Assman Cigar-pipe.
US1594606A (en) * 1922-07-05 1926-08-03 Gonzalo M Clivio Process and apparatus for extracting nicotine and other oils from tobacco smoke
US2815760A (en) * 1951-12-24 1957-12-10 Schreus Hans Theo Tobacco smoke filter
GB982670A (en) * 1962-06-28 1965-02-10 Gastone Beghe Filter cigarette
NL6502444A (enExample) * 1965-02-25 1966-08-26
US3373750A (en) * 1964-10-01 1968-03-19 Jon W. Beam Cigarette filter
US3394707A (en) * 1964-10-08 1968-07-30 Charles A. Ellis Cigarette filter and method of manufacture
US3395713A (en) * 1964-03-10 1968-08-06 Hans Ent Keller Filtering arrangement for smoking articles
US3438381A (en) * 1967-02-01 1969-04-15 Edith A Hale Filter for tobacco products

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US732252A (en) * 1902-11-04 1903-06-30 William Assman Cigar-pipe.
US1594606A (en) * 1922-07-05 1926-08-03 Gonzalo M Clivio Process and apparatus for extracting nicotine and other oils from tobacco smoke
US2815760A (en) * 1951-12-24 1957-12-10 Schreus Hans Theo Tobacco smoke filter
GB982670A (en) * 1962-06-28 1965-02-10 Gastone Beghe Filter cigarette
US3395713A (en) * 1964-03-10 1968-08-06 Hans Ent Keller Filtering arrangement for smoking articles
US3373750A (en) * 1964-10-01 1968-03-19 Jon W. Beam Cigarette filter
US3394707A (en) * 1964-10-08 1968-07-30 Charles A. Ellis Cigarette filter and method of manufacture
NL6502444A (enExample) * 1965-02-25 1966-08-26
US3438381A (en) * 1967-02-01 1969-04-15 Edith A Hale Filter for tobacco products

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4253508A (en) * 1979-01-19 1981-03-03 Bodai Industries, Inc. Selective filtering of tobacco smoke by enhanced filtration efficiency
US4347983A (en) * 1979-01-19 1982-09-07 Sontek Industries, Inc. Hyperbolic frequency modulation related to aero/hydrodynamic flow systems

Also Published As

Publication number Publication date
GB1231564A (enExample) 1971-05-12

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