The encased product of the present invention comprises an elongated flexible casing cylindrically shaped substantially along its length and having opposite end closures. A product material fills the cavity formed by the flexible casing and maintains the casing in a cylindrical shape. The cylindrical...http://www.google.es/patents/US4972547?utm_source=gb-gplus-sharePatente US4972547 - Encased product and method and apparatus for encasing same
Encased product and method and apparatus for encasing same
