| 摘要 |
<p>The invention relates to a dispensing head for a fluid material, to be mounted onto a store for a fluid material (R), the volume of which is variable and which has a mobile wall (P), the head including: a dispensing port (12); a sealing tip (22) which seals off the dispensing port (12); a resilient means (21, 27, 35, 4) for urging the tip (22) against the port (12), a fluid-material intake (32) communicating with the store (R), the head also including a differential flexible membrane (21) defining bottom (Si) and top (Ss) surfaces that are subjected to forces having opposite pressures, respectively, said forces being exerted by the pressurised fluid material, wherein the bottom surface (Si) is substantially lower than the top surface (Ss), and the sealing tip (22) is formed by the flexible membrane.</p> |
