Abstract: A process for producing a double dispensing device having a piston (2) functioning a check valve for allowing a gas to move from below to the above the piston, while preventing it from moving from above to below, said process comprising steps of loading a pressurized gas insoluble in a stock solution into a first chamber (N1) to below said piston (2) through a valve (6), allowing said pressurized gas to move into a second chamber (N2) above said piston (process S2), and transferring said pressurized gas in said first chamber (N1) into said second chamber (N2) by similarly loading stock solution into said first chamber (N1) (process S3).

Abstract: An aerosol product comprising a double-chamber container separated by a movable partition capable of dividing contents therewith, one spatial portion thereof being loaded with contents to be discharged and the other spatial portion being loaded with compressed gas for pressurizing. The compressed gas is a mixed compressed gas of at least two types of mixed gas, at least a part of the partition presents permeability of the compressed gas, and the mixed compressed gas selectively permeates the partition to be dissolved in the contents to be ready for discharge.

Abstract: A fixed-amount spray type aerosol container in which stem rubber is pressed against a mounting cap by a spring provided below the stem connected to a nozzle, and a tank is fixed between a guide bush that fixes the stem rubber and a housing, the container including a valve with a shape stabilizer installed between the guide bush and the tank. The container is nearly free from entry of external air and can spray the contents at a nearly constant amount until the contents nearly run out.

Abstract: A lid mounting structure for a pressure vessel for preventing a lid member 2 crimped to a curled portion 6 of an opening 5 of a vessel body 1 from being blown away by an abnormal rise of the internal pressure. A cut-away portion 8 or a through hole is formed in an outside wall of the curled portion 6, thereby locally reducing the elastic deformation resisting strength of the curled portion 6 with respect to expansion of the inside diameter of the opening to a level lower than that of the elastic deformation resisting strength of the lid member 2 in the inward radial direction.

Abstract: An aerosol composition which forms a foam exhibiting a cracking sound upon defoaming when subjected to blow out in the form of a mist or a foam, containing an aliphatic hydrocarbon having a boiling point of -5.degree. to +40.degree. C. The aerosol composition of the present invention has the advantages that a uniform dispersion can be easily formed with using various effective components, that it has an improved fast-drying property and produces an increased foam crackling sound and that it does not affect the environment adversly.