A self-inflating air mattress comprising an airtight flexible jacket enclosing a core of a resilient, open cell, lightweight foam material, substantially the entire upper and lower portions of which are bonded to the envelope. The process of making this mattress comprises first laying down two sheets...http://www.google.es/patents/US4025974?utm_source=gb-gplus-sharePatente US4025974 - Air mattress and method of making the same
