| 摘要 |
The outer shell of a removable smoke filtering cartridge for fitting inside a cigarette holder is formed from two coaxially abutting tubes separated by a wall with a hole. A tubular inner lip around the hole extends into the space within the first tube, a trough being defined around this lip. A cup is mounted within the first tube remote and facing away from the wall, intercepting across the first tube except for one or more narrow spaces defined between the cup and the first tube inner wall. The parts of these narrow spaces nearer the wall communicate to the space between the cup and the wall. One or more small apertures are formed through the side wall of the cup and communicate the space within the cup to the narrow spaces. A disk is mounted across the first tube against the side of the cup remote from the wall. Smoke passes through a hole in the disk into the space within the cup, passes through the small apertures to enter the narrow spaces, and impinges against the inner wall of the tube, to which the larger tar particles in the smoke stick. Then the smoke passes through the narrow spaces, sweeping these tar particles along and depositing them in the trough, and passes through the hole in the wall into a filter mounted within the second tube, which purifies the smoke of some of the smaller tar particles still in it. |
