Injection molded and injection blow molded multi-layer plastic articles, parisons and containers are provided, which, in preferred embodiments are substantially rigid and have at least three layers wherein a portion of the marginal end portion of their internal layer is folded over within the marginal...http://www.google.es/patents/US4554190?utm_source=gb-gplus-sharePatente US4554190 - Plastic containers with folded-over internal layers and methods for making same
Plastic containers with folded-over internal layers and methods for making same
