Filter for cigarettes with two chambers

The invention is directed to a filter for removing cigarette smoke particles. The filter is comprised of a housing having an inlet and an outlet. A first diaphragm is positioned adjacent the housing inlet and a second diaphragm is positioned midway along the length of the housing and dividing the filter into forward and rearward chambers. At least one smoke particle condensing surface is positioned within each of the forward and rearward chambers. The smoke particles condensing surface provides additional surface upon which the particles condense after passing through at least the first diaphragm.

BACKGROUND OF THE INVENTION 
The mechanical holding of said substances, which are oily, is achieved by 
passing the smoke through successive diaphragms with tubes and through two 
chambers with surfaces at which the smoke falls and which divert the smoke 
which is inhaled from the burning cigarette. Simultaneously the holding of 
such oily substances is also achieved by the solidification to which the 
substances are subjected during their obligatory paning through the tubes, 
diaphragms and the two chambers and consequently part of the cooled 
molecules stick to the inner surface of the chambers, diaphragms and 
surfaces at which the smoke falls. 
DESCRIPTION OF THE PRIOR ART 
Up-to-date technology has made several types of filters for cigarettes, 
based so as part of the oily substances of burning (pitch and other 
remaining substances) are restrained. 
However the up-to-date constructions are limited to simple tubes or 
eventually to the creation of a chamber at the inner surface of which the 
inhaled smoke falls and which holds a small part of the oily substances 
which it contains. The holding of the oily substances by the up-to-date 
made filters is not satisfactory and this is proved by making the 
following test: Soaking up smoke by using the up-to-date constructed pipes 
and after holding it in the mouth, to puff it on a white piece of paper 
held in contact with our mouth. The paper becomes yellow, and darker 
yellow when the smoke contains more oily substances (pitch.). 
SUMMARY OF THE INVENTION 
An object of this invention is to provide a cigarette filter which will 
hold much more of the oily substances and which will reduce essentially 
the percentage of the harmful substances from the inhaled smoke as can be 
visibly demonstrated by test described above. 
The retaining of the harmful substances is achieved while the smoke passing 
through the filter, the smoke does not follow a straight line toward the 
mouth of the filter, but remains for a longer period in the two chambers, 
panes through several tubes being installed in different levels and falls 
at the two additional levels which are installed into the chambers with 
the result that the smoke covers a larger distance comes into contact with 
a larger surface of the filter body where large quantities of coal 
molecules are held. On the other hand, because of the large distance and 
the larger inner surface, the oily ingredients of burning have plenty of 
time to be cooled and to be concentrated on the inner side and surfaces of 
the filter at which the smoke falls.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
The head of the filter 1 includes a portion 12 for receiving a cigarette. 
Opposite the head cigarette receiving portion 12 is a threaded portion 14 
adapted for threadly mating with a cooperating threaded portion 15 of a 
main filter body 2. 
Within the main filter body 2 is a longitudinally extending chamber 19 
adapted for reception of a filter assembly 3. 
The main filter body opposite the small filter chamber forms a mouthpiece 
4. The preferred configuration of the mouthpiece is more clearly 
illustrated in FIG. 4. 
A first diaphragm 16 which includes a plurality of longitudinally extending 
apertures 17 is provided rearwardly adjacent to the head cigarette 
receiveing portion 12. 
Positioned rearwardly adjacent to the first diaphragm 16 is centrally 
positioned partial barrier 5. 
Attached to a rear surface 20 of the partial blockade 5 is a longitudinally 
rearwardly extending rod-like member 7. Attached to and supported by a 
rearward portion 21 of the rod-like member 7 is a second diaphragm 6 which 
includes a plurality of longitudinally extending apertures 23. 
A first chamber 10 is formed by the partial barrier 5, the interior surface 
of the filter 3 and the second diaphragm 6. The various surfaces forming 
the first chamber 10 provide a recepticle for the condensed cigarette 
smoke molecules. 
To the rearmost end 24 of the rod-like member 7 is mounted a disk member 9 
which forms an additional surface upon which the smoke particles will 
condense, and which provide a forward wall of a second chamber 11. 
A longitudinally extending passage 8 is provided within the main filter 
body 2 for providing communication between a rear end 25 of the filter 3 
and the mouthpiece 4. 
FIG. 2 illustrates the preferred aperture arrangement of the second 
diaphragm 6; while FIG. 3 illustrates the positioning of the partial 
blockade within the filter 3. 
The cigarette filter of the present invention can be constructed in any 
desired form, shape and size, the drawing attached herewith not consisting 
a restrictive form of the invention, but just a descriptional design. Any 
not essential modification of this drawing as well as any modification 
which does not constitute an invention idea and does not consist in new 
invention elements or does not contribute to the development of whatever 
is known, or does not contribute to the solution of existing technical 
problem, does not restrict the rights on this invention. For example, 
according to the constructional needs the filter may be divided into two 
or more pieces, fitted to each other, or more surfaces on which the smoke 
can fall can be added into the chambers.