Apparatus for stabilizing the pressure of gaseous testing fluid for cigarettes and the like

摘要

Apparatus for stabilizing the pressure of air which is admitted into a cigarette testing device has a relatively large cylindrical vessel one end wall of which has an inlet receiving compressed air from a source by way of several pressure reducing valves and a flow restrictor. The inlet has a large number of openings and is surrounded by a first outlet which is also formed with a large number of openings and allows the major part of admitted air to escape from the vessel. The other end wall of the vessel has a single opening for admission of testing fluid into the testing device. The cross-sectional area of the passage which is defined by the flow restrictor for the flow of air into the vessel is a small fraction of the combined cross-sectional area of openings which form the first outlet, and the combined cross-sectional area of the openings which form the first outlet is a large multiple of the cross-sectional area of the second outlet. The vessel is filled with a diffusor material, such as a series of sieves, a mass of foamed plastic material and/or a mass of fibers. The quantity of air which can be stored in the vessel greatly excess the quantity of air which is required by the testing device for the testing of a cigarette.