US2968305A - Filter cigarette - Google Patents

Description

1961 J. MAZAR BARNETT 2,963,305

FILTER CIGARETTE Filed Au 12, 1957 2 Sheets-Sheet l INVENTOR.

55:51; 11; 51 a VP IEWI t v AI x 711 5,, niiiir J. MAZAR BARNETT Jan. 17,-1961 FILTER CIGARETTE 2 SheetsSheet 2 Filed Au flz, 1957 $NTOR.

r 2,968,305 ,FILTER CIGARETTE Jose Mazar Barnett, Buenos Aires, Argentina, assignor to Filtox S.A., Montevideo, Uruguay, a corporation of Uruguay Filed Aug. 12, 1957, Ser. No. 677,463

3 Claims. (Cl. 131-10) The present inventionrelates to a filter cigarette and more particularly to a novel construction of cigarette and filter, wherein a capsule-like filter is employed which acts by condensation and adsorption on smoke.

According to the invention, the filter is disposed at one end of the tobacco of the cigarette and constitutes a mult'i-sectione'd intercepting unit between the cigarette and the smokers mouth, whereby tars, most of the nicotine and other impurities are removed from the smoke an'd'collected'in the unit.

The intercepting unit generally comprises an outer capsule having at one end outlet openings for the passage of the smoke towards the smokers mouth and against this'end the filtering material is disposed, preferably in the form of granules of the type that acts by adsorption. The outer capsule has therewithin an inner capsule of special configuration and an interfitting cap with a projecting boss, thereby forming a tortuous or labyrinthine passageway with numerous changes in direction to achieve maximum detoxification and purification of the smoke in its travel from the burning tobacco to the smokers mouth.

An object of the invention is to provide a cigarette with a filter which removes a maximum of noxious and toxic matter in the smoke and which is eificient throughout the smoking of the entire cigarette.

Another object is to obtain an efficient adsorption by means of filtering grains located in the filter just prior to the passing of the smoke to the smokers mouth and beyond, in the path of travel of the smoke, a portion of the filter which acts as a condenser, thus conditioning the smoke for the subsequent adsorption.

Another object is to prevent hot smoke from reaching the smokers mouth by passing it through a tortuous or labyrinthine path which, through condensation and adsorption, cools the smoke as well as removing toxicants therefrom.

A further object resides in reducing the speed of the traveling smoke to obtain a lower temperature.

Still another object of the invention is to provide the smoker with a cigarette that does not require a separate sigarette holder for the filtering of the smoke.

Further objects and advantages of this invention will be understood from the following description taken in conjunction with the accompanying drawings, in which:

Fig. 1 shows a double unit made up of two filter cigarettes united to each other at their filtering extremities and adapted to be transversely severed to form completed individual filter cigarettes;

Fig. 2 is an enlarged fragmentary portion of Fig. 1;

Fig. 3 is a view similar to Fig. 2 of the two cigarettes obtained upon severance;

Fig. 4 shows a cigarette of the invention in use graphically illustrating by arrows the labyrinthine path of the smoke toward the smokers mouth;

Fig. 5 is a transverse sectional view taken through the filter portion of the cigarette of Fig. 4;

Fig. 6 is a longitudinal sectional view of the dual filters for two cigarettes, showing the manner in which they are ired rates atetit 2,968,305 Patented Jan; 3?, W61

loaded with filtering material and assembly of the parts made; and

Fig. 7 is a perspective view of a filter cigarette with filter according to the principles which are described herein.

In the drawings, a, b and c are three filter parts which maybe of any suitable material, preferably of polyethylene or similar type plastic which is resilient and durable and which permits of cutting as by a knife to separate the two units which are simultaneously manufactured.

The part a isthe outer or principal capsule element formed by the disc-shaped end 1 and Wall 2, the lower end 1 having openings 3 for the passage of smoke to the smokers mouth and set against another identical capsule element as shownin Figs. 1 and 2. The pair of capsule elements a are molded together as one piece with common ends 1, so that by transverse cutting along line 4 separation of the elements a is obtained, as shown in Figure 3. The inner surface of wall 2 is provided with spaced recesses or depressions 14.

' The parts b and c are fitted together in the relationship shown in part a spaced from end 1, forming a condenser and labyrinthine passages for smoke and leaving a chamber 5 between 'for the reception of the filtering granules 11 which are thus located between end 1 of part a and end 6 of part b.

The par-tb is an inner capsule element, the end 6 of which is parallel to and spaced from end 1 of part a but is of lesser diameter so that its Wall 7 lies inwardly of wall 2. Wall 7 is provided with openings 9 spaced therearound and with an external annular shouldered projection 8.

The part c is a cap member, which is also of capsule form, and the wall 12 of which has openings 10 and a portion extending into proximity with the terminus of wall 7 of part b, as shown in Fig. 4, and which portion has teeth or projections 13 which interfit with recesses 14 of part a. The central portion of part c has a boss or projection 15 with a cavity 17 and the end of the boss has openings 18 laterally directed. When parts b and c are assembled, a chamber 16 is formed between wall 7 and boss 15 and another chamber 19 is formed between walls 7 and 12. Chambers 16 and 19 are annular cells, as will be appreciated. When parts b and c are assembled, as shown, they are then introduced to part a subsequent to the positioning of filtering granules 11 in part a, the mode and sequence of assembly being illustrated in and clear from Fig. 6, in particular. As will be understood from Fig. 7, the paper wrapper 20 encloses both the tobacco 21 and the filter, which latter is aligned as a continuation of the tobacco.

It will also be understood that part a is formed or molded of the plastic material as a double or dual capsule which is subsequently severed along line 4 (Fig. 6) at any desired stage either before or after complete assembly with parts b and c and/or tobacco 21 and paper wrapper 20.

From Fig. 4, it will be seen that smoke from the cigarette passes into cavity 17, through openings 18 to cham- I ber 16 and via openings 9 to chamber 19 thence via openings 10 into contact with filtering material 11 to the smokers mouth through openings 3 in end 1. This tortuous or labyrinthine path of the smoke effects exceptionally good detoxification and purification of the smoke by a combination of condensation and adsorption, thus achieving the objects hereinbefore stated.

The filtering granules 11, instead of being grains, may be in powdered state, laminas, scales, filiform elements, etc. and are composed of silica gel, activated carbon or other suitable material capable of detoxifying and purifying smoke.

' Within the terms of the appended claims, various modifications of detail and structure may be made without departing from the scope or principles of the invention.

I claim:

1. In a filter cigarette, a chambered filter composed of a plurality .of interfitting capsule-like parts configured to form a labyrinthine path effecting changes of direction and speed of smoke passing therethrough and filtering material disposed in a chamber of said filter and over which the smoke passes as it leaves the filter, said capsulelike parts including an outer capsule element having an end provided with openings and a wall with depressions in its inner surface, an inner capsule element having an imperforate end and a wall with openings therein and with an external annular shouldered projection inwardly spaced from the wall of the outer capsule element and a cap member having a hollow boss projecting into said inner capsule element and having openings therein, the boss being inwardly spaced from the wall of the inner capsule element, said cap member having a second boss provided with projections thereon for reception in the wall depressions of the outer capsule element, said second boss being spaced from the wall and from the external projection of the inner capsule element, the filtering material being located between the imperforate end of the inner capsule element and the opening-provided end of the outer capsule element the smoke passing inwardly through the openings of the cap member and downwardly within the space between the inner cap member and the inner capsule element through the openings in the inner capsule element radially outwardly and upwardly around the projection and within the space between the inner capsule element and the outer capsule element through the filtering material and emitting through the apertures in the end wall of the outer capsule element.

2. The structure as set forth in claim 1, wherein the filtering material is granules of silica gel.

3. The structure as set forth in claim 1, wherein the filtering material is granules of activated carbon.

References Cited in the file of this patent UNITED STATES PATENTS

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