U.S. patent application number 11/591707 was filed with the patent office on 2007-05-10 for filter tip.
Invention is credited to Xiaolei Xiahou.
Application Number | 20070102016 11/591707 |
Document ID | / |
Family ID | 36604391 |
Filed Date | 2007-05-10 |
United States Patent
Application |
20070102016 |
Kind Code |
A1 |
Xiahou; Xiaolei |
May 10, 2007 |
Filter tip
Abstract
A filter tip used by a cigarette has at least one screw-like
tunnel. Adopting the above structure, under the premise of not
increasing air clogging, the screw-like tunnel of the present
cigarette filter increases path length of the smoke crossing the
cigarette filter and enlarges adsorbing area of the cigarette
filter to injurant in the smoke, so as to achieve the object of
improving filtering effect of the cigarette filter of a
cigarette.
Inventors: |
Xiahou; Xiaolei; (Beijing,
CN) |
Correspondence
Address: |
GREER, BURNS & CRAIN
300 S WACKER DR
25TH FLOOR
CHICAGO
IL
60606
US
|
Family ID: |
36604391 |
Appl. No.: |
11/591707 |
Filed: |
November 2, 2006 |
Current U.S.
Class: |
131/339 ;
131/361 |
Current CPC
Class: |
A24D 3/18 20130101; A24D
3/04 20130101 |
Class at
Publication: |
131/339 ;
131/361 |
International
Class: |
A24D 3/04 20060101
A24D003/04 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 7, 2005 |
CN |
200510117395.4 |
Claims
1. A filter tip, comprising: a cigarette filter, a filtration
encasing paper, an interface, wherein said cigarette filter has at
least one screw-like tunnel.
2. The filter tip as claimed in claim 1, characterized in that said
screw-like tunnel is a hole, the wall of which has screw grooves
provided on the cigarette filter.
3. The filter tip as claimed in claim 1, characterized in that said
screw-like tunnel is at least one screw hole on the cigarette
filter, axially extending along the cigarette filter.
4. The filter tip as claimed in claim 1, characterized in that said
screw-like tunnel impenetrates the cigarette filter.
5. The filter tip as claimed in claim 2, characterized in that said
screw-like tunnel impenetrates the cigarette filter.
6. The filter tip as claimed in claim 3, characterized in that said
screw-like tunnel impenetrates the cigarette filter.
7. The filter tip as claimed in claim 1, characterized in that said
screw-like tunnel does not impenetrate the cigarette filter.
8. The filter tip as claimed in claim 2, characterized in that said
screw-like tunnel does not impenetrate the cigarette filter.
9. The filter tip as claimed in claim 3, characterized in that said
screw-like tunnel does not impenetrate the cigarette filter.
10. The filter tip as claimed in claim 1, characterized in that
said at least one screw-like tunnel is multiple.
11. The filter tip as claimed in claim 2, characterized in that
said at least one screw-like tunnel is multiple.
12. The filter tip as claimed in claim 3, characterized in that
said at least one screw-like tunnel is multiple.
Description
Field OF THE INVENTION
[0001] The present invention relates to a filter tip of a
cigarette.
BACKGROUND OF THE INVENTION
[0002] A conventional filter tip is joined one end, e.g. inhalation
end of a cigarette. A cigarettes filter made up of flock fiber
material is wrapped in filtration encasing paper. While fog is
inhaled into human body through the cigarettes filter, part of the
injurant is adsorbed into the cigarettes filter, so that this
reduces smokers' inhalation quantity of the injurant such as tar to
some extent.
[0003] There are two kinds of structures of the conventional filter
tips mostly. One is a columniform cigarettes filter which is
wrapped in filtration encasing paper and there is an interface
conglutinated with the cigarette at one end of the filter tip. The
defect of this kind of filter tip is the axial length of the filter
tip is limited by the interspaces dimension among the cigarettes
filter fiber. Along with the length of cigarettes filter
increasing, resistance of fog crossing the cigarettes filter will
increase correspondingly. If the length of the cigarettes filter
exceeds a certain length, the smoker will feel discomfortable and
the quality of the cigarettes will be influenced. Another kind is
the cigarettes filter which is provided with an axial via with
different section shapes, such as, star shape or triangle etc, and
the axial via impenetrates the cigarettes filter and directly leads
to the inhalation end of the cigarette. The axial dimension of this
kind of the filter tip is normally relatively long with the aim
that by the structure of increasing the axial dimension of the
filter tip to increase adsorbing area of the cigarettes filter to
the fog to achieve filtering effect. But the defect is that the
axial dimension of the filter tip is relatively long and decreasing
the length of the filter tip can obviously weaken filtering
function. Therefore, the conventional filter tips of cigarette have
double contradictions between the axial length of the filter tip of
the cigarette and the smoke resistance, as well as between the
axial length of the filter tip and the filtering effect.
SUMMARY OF THE INVENTION
[0004] An object of the present invention is to provide a filter
tip of cigarette with low Smoke resistance and can improve
filtering effect.
[0005] To achieve the above object, a filter tip of the present
invention adopts a technical solution that there is at least one
screw-ship tunnel in a cigarettes filter. Said screw-ship tunnel
adds path length of fog crossing the cigarettes filter and enlarges
adsorbing area of cigarettes filter to the fog. Under the
centrifugal force, injurant in the fog can be more adsorbed on wall
of the tunnel.
[0006] The first embodiment of the present invention is said
cigarettes filter of the filter tip has at least one hole, the wall
of which has screw-ship, said screw-ship can be single-headed and
can also be multi-headed.
[0007] The second embodiment of the present invention is said
cigarettes filter of the filter tip has at least one screw hole
axially extending along the cigarettes filter.
[0008] A screw-ship tunnel of the cigarettes filter of the filter
tip of the present invention may impenetrate the cigarettes
filter.
[0009] A screw-ship tunnel of the cigarettes filter of the filter
tip of the present invention may also not impenetrate the
cigarettes filter.
[0010] A cigarettes filter of the filter tip of the present
invention can has multiple screw-ship tunnels.
[0011] Adopting above structure, under the premise of not
increasing air clogging, the screw-ship tunnel of the cigarettes
filter of the filter tip of the present invention increases the
path length of the fog crossing the cigarettes filter and enlarges
adsorbing area of the cigarettes filter to injurant in the fog, so
as to achieve the object of improving filtering effect of the
cigarettes filter of the cigarette.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The solution provided by the present invention will be
better understood from following, detailed description of preferred
embodiments of the invention with reference to the drawings.
[0013] FIG. 1 is a cutaway view of the first embodiment of a filter
tip of the present invention.
[0014] FIG. 2 is a cutaway view of the second embodiment of a
filter tip of the present invention.
[0015] FIG. 3 is a cutaway view of the third embodiment of a filter
tip of the present invention.
[0016] FIG. 4 is a cutaway view of the fourth embodiment of a
filter tip of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0017] Firstly, as shown in FIG. 1, it is a cutaway view of the
first embodiment of a filter tip of the present invention. Said
filter tip includes cigarettes filter 1, filtration encasing paper2
and interface 3. The FIG. 1 shows that said cigarettes filter 1 has
a hole 4, the wall of which has screwgrooves 5. While after fog
enter the cigarettes filter 1 through the interface 3, flow with a
direction apart from the interface 3 alone with the hole 4. Part of
injurant in the fog is adsorbed on wall of the hole 4 and surface
of the screw grooves 5. Because the extending length of the screw
grooves 5 is larger than the axial dimension of the filter tip, its
filtering effect is better than the filter tips of the prior
art.
[0018] Secondly, as shown in FIG. 2, it is the second embodiment of
a filter tip of the present invention. It can be seen form the FIG.
2, the cigarettes filter 1 has a screw hole 7 axially extending
along the cigarettes filter 1. After the fog entering the
cigarettes filter 1 through the interface 3, it will flow with a
direction apart from the interface 3 alone with the screw hole 7.
Part of injurant in the fog is adsorbed on the wall of the screw
hole 7. Because the extending length of the screw hole 7 is larger
than the axial dimension of the filter tip, its filtering effect is
better than the filter tips of the prior art.
[0019] As shown in FIG. 3, it is the third embodiment of a filter
tip of the present invention. The hole 4 with screw grooves 5 on
the cigarettes filter 1 of the filter tip does not impenetrate the
cigarettes filter 1. There is a obstruction barrier 6 between the
hole 4 on the cigarettes filter and the interface 3. Said
obstruction barrier 6 can achieve filtering effect like the filter
tips of the prior art and the hole 4 connected with it with screw
grooves 5 processes the second filtering, cause better filtering
effect.
[0020] As shown in FIG. 4 it is the fourth embodiment of a filter
tip of the present invention. It is seen from the FIG. 4, the
structure of said screw-ship tunnel is the cigarettes filter 1 has
four screw holes 7. The screw holes 7 axially extend along the
cigarettes filter 1. After the fog entering the cigarettes filter 1
through the interface 3, it will flow with a direction apart from
the interface 3 through the screw hole 7. Part of injurant in the
fog is adsorbed on wall of the screw hole 7. Because the extending
length of the screw hole 7 is larger than axial dimension of the
filter tip, its filtering effect is better than the filter tips of
the prior art.
* * * * *