| 摘要 |
<p>A collapsible dispensing system for flowable materials is disclosed. A conical one-way valve assembly of coaxially conforming parts is attached to a collapsible container. An enclosing sleeve seals an elastomeric sheath to a valve body. Flowable materials are dispensed under positive pressure without back flow of external gases and contaminants, even after repeated dispensing of container contents. This enables flowable materials that are susceptible to oxidation and contamination to be reformulated without antioxidants and/or preservatives. The collapsible multiple dose dispensing system maintains the integrity and sterility of flowable materials, thereby prolonging product use life. The system takes advantage of a conical design, allowing for quicker, easier and cheaper manufacturing and assembly.</p> |
