Hollow structures and methods for forming same

Claim 1

A FRAMELESS HOLLOW STRUCTURE HAVING LONGITUDINAL AND TRANSVERSE AXES, SAID STRUCTURE BEING FORMED OF SHEETS OF PLIABLE MATERIAL LAMINATED TOGETHER AS A SANDWICH, THE INNERMOST SHEET OF SAID SANDWICH BEING MADE UP OF JERSEY CLOTH GENERALLY IN THE FORM OF A SOCK, SAID JERSEY CLOTH INITIALLY BEING RESILIENTLY STRETCHABLE TO A MATERIALLY GREATER EXTENT TRANSVERSELY OF SAID SOCK FORM THAN LONGITUDINALLY THEREOF, WHEREBY SAID SOCK MAY BE PULLED ENDWISE OVER A LONGITUDINAL FRAMEWORK OF GREATER TRANSVERSE SECTION THAN THE TRANSVERSE SECTION OF SAID SOCK IN UNSTRETCHED FORM, SAID SOCK BEING PRESTRESSED BOTH LONGITUDINALLY AND TRANSVERSELY AND BEING STRETCHED TO A GREATER EXTENT TRANSVERSELY THAN LONGITUDINALLY, THE NEXT SHEET OF SAID SANDWICH BEING FORMED OF UNSTRESSED PLIABLE SHEET MATERIAL APPLIED OVER SAID INNERMOST SHEET AND A SETTABLE BINDER IMPREGNATING SAID UNSTRESSED SHEET MATERIAL AND ADHERING TO SAID INNERMOST SHEET.