| 摘要 |
<p>The dispenser device in accordance with the invention comprises a tubular barrel filled with the product, a nose having a dispenser orifice, possibly closed by a detachable cap, a plunger and a pump assembly for pressurizing the product to be dispensed. This assembly comprises an obturator valve applied against a seat by a stem of the plunger which is biased by a spring. A skirt of the plunger slides in a socket of the barrel in a leakproof manner only over a portion of its stroke. The depression of the plunger actuates the opening of the valve and the pressurization of a quantity of air under the skirt. Air pressure is exerted on the product to cause it to emerge from the orifice.</p> |
