| 摘要 |
PURPOSE: To provide a spray can with a pressure regulator in a riser pipe that its connecting part functions as a buffer region and a securing device, and that gives better ejection characteristic when the valve is moved and reduces danger of sprinkling about. CONSTITUTION: A spray can 1 is provided with a pressure regulator 9 in a riser pipe 5 and a connecting part 10 between the pressure regulator 9 and a valve 6. A constant or nearly constant pressure equal to the regulated pressure of the pressure regulator 9 is set at the connecting part 10. However small the connecting part 10 is, accordingly, it has become functioning as a buffer region. In order to optimally utilize the buffering action, the pressure regulator 9 is desirably mounted by spacing a certain distance D from the valve 6. Most favorably, the pressure regulator 9 is provided at the entrance of the riser pipe 5 so that the whole riser pipe may be utilized as the buffer region. For further improvement of the buffering action, it is desirable to use a riser pipe 5 made of resilient synthetic material, that is deformable by influence of a pressure change. |
