JPS58165782A - Improvement in tobacco filter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cigarette filter for use in smoking implements such as cigarettes.

Vent means for introducing venting air into the filter are well known in the art, and their purpose is to reduce the total smoke content in the main stream of smoke. When ventilating air enters a filter made of fibrous filter material such as cellulose acetate through ventilation holes at the periphery of the filter, cigarette smoke flows through the axial direction with a diameter smaller than the diameter of the end face of the filter plug. This relatively narrow stream of smoke, which is known to flow out of the filter2, only impinges on the taste perception area of a limited area within the smoker's mouth.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cigarette filter which, when used, stimulates a wide area of the taste sensation in the smoker's mouth.

That is, the present invention provides a rod-shaped plug made of a filter material, which has one or more air-conducting tubes around the circumference of the plug, and the one or more air-conducting tubes are located at the suction end of the plug at a position far from the entire suction end of the outlet opening. an inlet opening in the plug, and the one or more air conduit tubes have an area whose depth gradually decreases along the air conduit tube toward the suction end of the plug. It is a cigarette filter plug.

Conveniently, the area of decreasing depth of the air conduction tube above 1.1^1 extends substantially in the housing at the inlet end of the plug, and 9. the air conduction tube may be plural. , each preferably comprising a plurality of grooves around the periphery of the filter plug and an inner surface of the wrapping means surrounding the filter plug. In this case, the groove width may be constant, or may increase or decrease toward the suction end of the filter plug.

BRIEF DESCRIPTION OF THE DRAWINGS In order to facilitate a better understanding and implementation of the invention, an example of the invention will be explained below with the aid of schematic drawings.

In the drawings, Figure 1 is a partial cross-sectional view of the filter tip cigarette in one curve direction, Figure 2 is the mouth end of the cigarette filter in Figure 1, and Figure 3 is the mouth end face of a filter different from that in Figure 1. , FIG. 4 is a partially exploded view of the peripheral surface of a filter plug of another shape.

The cigarette in Figure 1 is a cigarette vapor 2. (5) A self-shape-retaining filter plug 4 made of cut-out, cut-out, and fibrous cellulose acetate filter material? The periphery of the plug 4 has a large number of parallel filters 5 (8 in the drawing) extending in the axial direction.
Figure 2). As can be seen from FIG. 1, the groove 5 is shorter than the overall length of the plug and is provided from the mouth end of the plug 4, decreasing in depth in the direction of the mouth end of the plug substantially up to the mouth end. It seems like it's going on. A convenient method for forming the grooves 5 is to form a long filter rod from which the plug 4t or preferably several plugs are made using suitable molding means.
765 and the like. #
The surface of 5 may be made impermeable.

A tip material 7 is used for attaching the filter 3 to the cigarette rods 1 and 2, which forms an air connection f 8 km with the wall of the rod 5 at the base of m5.

The ventilation holes 9 of the chip material 7, which are exaggerated in the drawing, are #
The plug 4 is wound around the upstream end of #5 at a position (6), so that each air conductor 'R8 communicates with one or more ventilation holes 9.

When the cigarette of FIG. The air passes through the conduit 8'Ik and exits without mixing with the cigarette smoke, essentially without mixing. The groove 5 constituting a part of the air conduit f8 has a depth that decreases in the direction of the air flow along the conduit 8, so that the air can flow through the conduit 8.
When it exits the smoker's mouth and enters the smoker's mouth, it becomes a velocity component that moves outward in a circular manner.

In this way, due to the Coanda effect, a shunt of air is formed with the air flowing out from the mouth end of the filter plug 4, and as a result, the smoke hits a relatively wide area of the taste 5 in the smoker's mouth. For smokers, this is perceived as the same characteristic of smoke.

The filter, the mouth end of which is shown in FIG. 3, consists of a plug 4' having only one annular circumferential groove 57 instead of a plurality of longitudinal circumferential grooves. The axial cross-section of the plug 4' has a contour similar to that of the groove 5 of the plug 4 in FIG.

A strong outer collar or mouthpiece 7' made of plastic material or the like accommodates the plug 4', and the cigarette rod end is inserted in the same manner as the cigarette tipping 7 in FIG. The outer tube 7' must be of high strength so that the annular suction opening of the air passage tube 8' indicated by 6, which is constituted by the annular m5' and the outer f7', does not close when the filter is in use. It won't happen.

The effects obtained by the filter in Figure 3 are as follows:
It is similar to that of filter 3 in the figure.

When the ambient air is drawn into the air conduit 'u8 through the through hole (not shown) in the wrapper or mouth piece 7', the I#5'
This is because the shape of the smoker creates a shunt of air that enters the smoker's mouth, causing the smoke to impinge on a wide range of taste-sensing areas.

The dark blue diagram 4 is a peripheral ink developed diagram,
It can be used in place of the axially extending groove of the filter of FIG. 1 or the single annular groove 5' of the filter of FIG. In FIG. 4, numeral 10 indicates the suction end of the filter plug 11. The first set has peripheral edges 13 that are slightly offset from the axial direction of the plug 11, and the second set of springs 14 are offset in the opposite direction by the same angle. These two sets of continuous rods 13 and 14 intersect to form a complete network structure.

As in the case of a single type of groove 5, the grooves 13, 14 each have a region 1 which decreases in depth in the direction of the mouth end IO of the plug 11 substantially to its end. In use, the plug 11 is superimposed by a wrapper (not shown) which allows ambient air to be introduced into the groove from a point upstream of the groove 13.14, the smoke diffusion effect being achieved in a manner similar to that of the filters already described. be done.

The filter plug pouch and pinning means are composed of a permeable plug wrapper on the outer periphery of the plug and an impermeable long tip material overlaid on the plug wrapper and fixed to the filter plug' (+- tobacco rod 2). In this case, the ventilation holes are simply housed in the impermeable chip material.

In the case of a heart receiver, the filter plug may consist of two small plugs, one of which has a groove 5,13° (9) 14 or a single annular groove 5'7, and the other has a smooth surface. . Alternatively, the ventilation holes may be constructed from a single-hole zone of chip material.

[Brief explanation of the drawing]

Figure 1 shows the axial portion of a filter tip cigarette.
i-side view, Figure 2 shows the mouth end of the cigarette filter in Figure 1, Figure 3 shows the mouth end of a different filter than the one in Figure 1, and Figure 4 shows the peripheral surface of a filter plug of a different shape. It is a partially developed view. 1... Cigarette rod 2... Cigarette paper 3... Filter 4.4', 10... Filter plug 5.5', 13
．． 14... Groove 6... Lower between suction ports... Chip material 7'... Outer tube 8.8'... Air conducting tube 9... Ventilation hole 10... Suction end. Watch applicant Brown & William Non-Tobacco Corporation Agent Maruyama * Tsuyoshi (10)

Claims (1)

[Claims] 1. A rod-shaped plug made of filter material, having one or more air-conducting pipes on the periphery of the plug, and one or more air-conducting pipes having an outlet opening at the suction end of the plug. The one or more air conduit tubes (8') have an inlet opening spaced apart from the plugs (4), (4'), (
1o) A cigarette filter characterized by having an area of gradually decreasing depth along the air conduit towards the mouth end. 2. The filter according to claim 1, wherein the zone of gradually decreasing depth of the air conducting tube continues substantially to the inlet end of the plug (4)*(4'), Do). 3. Surround plugs (4) and (4') and J+! 1 edge air total air quantity or more o2 air 4m%t (8) # (8/) i
The filter according to each of the preceding items, which has a wrapping (7) that is placed away from the mouth end of the Norag. 4. Multiple air conductors w (8) are filter plugs (4)
4. The filter according to claim 3, wherein the filter is formed by a plurality of long grooves (5) running on the peripheral surface and an inner surface of the pin (7). 5. The filter according to item 114, wherein W (5") and (13, 14) have constant widths. 6. The width of the groove (5) increases toward the suction end of the plug (4). There are two sets of # (13, 14) in the filter 07 described in liK4m, and the first set of grooves (1
3) is spiral in one direction and has a second set of grooves (14);
is spiral in the opposite direction, the first set of 1k (13)
one or more of the grooves (14) of the second set intersect with the plurality of grooves (14);
Each set of valley grooves (13, 14) has an inlet end that is deeper than the outlet end, and has any of the stripes 4 to 6 in which the area ha between the inlet end and the outlet end gradually decreases. Filters listed in. 8. The filter according to any one of items 4 to 7, wherein the wrapping has ventilation holes (9) to allow air to be introduced into the portion #(5). 9. An annular groove (5) is provided around the circumference of the plug (4').
'), the - side is deeper than the other, and the shallower f
11. The filter according to any one of items 1 to 3, wherein the filter has a plug (an air conducting pipe (8) t-, the deep side of which is provided at a position far from the suction end at the four suction ends. 10. The suction port of the plug. The plug (4') has an entire end at the end, and a gap is formed between the outer circumference of the inlet port of the plug (4') and the inner surface of the outer pipe (7'), thereby forming an outlet end of the air conducting pipe (8'); The groove (5'
) The plug (4'
10. Filter according to claim 9, having a strong outer tube (7') for containing and enclosing the tube.