Ostomy appliance having improved features for maintaining positive seal while being worn comprises mating cylindrical connectors on a base to be affixed to the ostamate and on the collection bag to be affixed to the base so proportioned that pressures created by body movements of the wearer tend to enhance...http://www.google.es/patents/US4359051?utm_source=gb-gplus-sharePatente US4359051 - Ostomy appliance closure
