| 摘要 |
<p>A ring sealing gassing valve of Mylar has one side coated with adhesive and a solvent vent substantially spanning its width. The adhesive is solvent activated from one end to the solvent vent. The valve is placed over a propellant gassing hole in the body of a pressurized dispenser to bond the valve and dispenser together proximate the gassing hole and only in the solvent activated area. The gassing hole is at the apex of a dome-shaped recess over which the valve lies, and a primary seal is developed at the edge of the recess and the valve because of the force of propellant acting on the valve over the recess.</p> |
