| 摘要 |
<p>A dispenser package for viscous fluids comprising a container (20) having one end open and provided with a piston (21) and the other end closed by a compressible chamber defined by a plastic bellows (24) that is deflected by movement of a plunger to dispense a portion of the viscous fluid from the container. The plastic bellows (24) comprises a central tubular portion (25), a hub (26) extending radially outwardly from the tubular portion (25), a plurality of circumferentially spaced panels (27, 28) extending transversely and radially from the hub to a peripheral skirt extending axially away from the tubular portion. Integral circumferentially spaced ribs (31) interconnect the panels (27, 28) . Alternate panels (28) extend axially and radially upwardly toward the tubular portion while the remaining panels (27) extend transversely and radially downwardly away from the tubular portion (25).</p> |
