DEVICE FOR PURIFYING TOBACCO SMOKE

Abstract: A device for removing noxious substances in the smoke of tobacco in a cigarette holder or pipe, including cooling fins (2) formed on the outer periphery thereof, a front flue portion (9) for accomodating a fibrous substance (4) such as tissue paper or the like therein, and a metallic cylinder (3) having a cooling chamber of an inner diameter larger than that of the flue portion (9). The device is telescopically inserted into a mouthpiece (1), and is adapted to abruptly cool tobacco smoke owing to the cooperative action of heat dissipation by the cooling fins and the adiabatic expansion of the smoke upon flowing into the cooling chamber from the flue portion. As a result, noxious substances in the smoke, such as nicotine and tar, are condensed and allowed to adhere to the fibrous substance in the cooling chamber for effective removal.

Description: SPECIFICATION 1. TITLE OF THE INVENTION Device for Purification of Tobacco Smoke 2. DETAILED DESCRIPTION OF THE INVENTION With the objective of eliminating the noxious substances such as tar and nicotine in cigarette smoke, various cigarette holders or filters have heretofore been designed. However, in all of them, the elimination of noxious substances is mostly ineffectual and practically minimal at the most. In this respect, it is the object of this invention to provide a smoke purifier which affords exceptionally efficient eliminative re sults. In its basic form as illustrated in Addendum 1, Figure 1, to the fore of the mouthpiece (1) there is provided a metallic cooling-chamber tube (3) approximately 30-50 millimeters in length and with an inside diameter of approximately 10-20 millimeters, with outer cooling fins (2). The front end of the cooling-chamber piece is provided with a socket for a cigarette thus making the assemblage a cigarette holder whereby, as shown in Figure 2, a cigarette (6) is inserted and smoked; or, as shown in Figure 3, a bowl (8) with a combustion chamber (7) is attached and the assemblage used as a tobacco pipe. As to its usage, referring to Figure 1 to identify each part, the mouthpiece (1) is detached and the cooling tube (3) is filled with 1-2 sheets of Kleenex-type tissue paper or a like volume of some such fibrous material (4). The mouthpiece is then reattached. When a cigarette is inserted and smoked, the smoke flows through the flue (9), enters the cooling tube (3) wherein it is cooled by adiabatic expansion while, with the effect of the cooling fins (2) on the exterior surface of the cooling tube, exterior cooling is also attained. Consequently, noxious substances, such as tar and nicotine, present in the smoke in gaseous or atomized form, condense and adhere to the fibrous material (4) in the cooling chamber. It was found that the smoke which then emerges from the mouthpiece is extremely cleanly purified. With respect to this purifying action, a point of special note is that the noxious substances in the smoke are not just filtered by the fibrous material but that the smoke which passes through the flue (9) is adiabatically expanded in the cooling chamber whose diameter is large and pressure lower than that of the flue section. Concurrently, by means of the cooling fins (2), the smoke is cooled from the outside. These reactions convert gaseous noxious substances contained in the smoke to fine liquid particles which join with those noxious substances in atomized form initially;present in the smoke. Because the fibrous material is placed at the point of this cooling process, an exceedingly effective condensation and trapping of noxious substances occurs. As proof of this, when the fibrous material (4) used in this de vice is taken out and examined after several cigarettes have been smoked through it, the material is, of course, colored a dark brown but a large amount of volatile noxious substances is trapped in the material and the odor given off is extremely foul. In contrast to this, when cigarettes are smoked without any device or with hitherto available cigarette holders or filters, this foul-smelling noxious substance is not at all trapped but is sucked in directly by the mouth and congeals on or is absorbed by the lungs, windpipe, lips, palate, tongue, and saliva; with horribly harmful consequences to physical health. Incidentally, in applying this invention to a cigarette holder, as shown in Figure 2, the fins (2) may be omitted and a plain metal tube may be utilized, whilst it is also possible to manufacture it with syn thetic materials. However, although such measures might reduce the manufacturing costs, concurrent reduction of condensation and elimina tion cannot be avoided. In the foregoing respect, the conditions are identical in the case where, as shown in Figure 3, the usage is for a tobacco pipe. Furthermore, because the fibrous material, such as tissue paper, which is used in the cooling tube (3) can be any such material readily available and easily replaceable, the cost of replenishment is close to nil. It is also a great advantage that the inconvenience and waste due to frequent and inevitable purchases of replacement cartridges for heretofore available holders and filters become quite needless. As set forth, by means of an extremely simple method, a highly effective device for the purification of tobacco smoke can be provided, and, as a consequence of which, an immense effect can be made on hygiene. 3. SIMPLE EXPLANATION OF DRAWINGS Figure 1 is a cross-sectional plan view of a smoke purification device per this invention. Figure 2 is a plan view of an application of this invention in a cigarette holder. Figure 3 is a partially cross-sectional plan view of an application of this invention in a tobacco pipe. 1... mouthpiece 2.... cooling fin 3....cooling-chamber tube 4 fibrous material 5.... socket 6.... cigarette 7 combustion chamber 8 bowl 9 flue

Claims: CLAIM A device to purify smoke, comprising the special features, to the front of the mouthpiece, of a cooling chamber with an inside diameter of approximately 12 millimeters and with a capacity for lightly accommodating fibrous material equivalent to about 1 - 2 sheets of Kleenex-type tissue paper; of a socket at the front end of the cooling chamber to accommodate a cigarette; and, to be used as a cigarette holder or, with a tobacco-burning bowl attached, to be used as a tobacco pipe; the afore-mentioned fibrous material to be changeable when soiled.

Inventors: KAWAMURA, MASAYA
Applicants: JAPAN SPECIAL-HIGH TECHNIQUE RESEARCH INSTITUTE CO., LTD.
Application year: 1980
Main classification: A24F13
IPC codes: A24F13, A24F7, A24F1