Inflatable therapeutic device and method of making same

Claim 1

A THERAPEUTIC PRESSURE RESPONSIVE DEVICE MADE FROM AT LEAST TWO LAMINATED SHEETS OF FLEXIBLE, NON-ELASTIC "PLASTIC" FILM-LIKE MATERIAL SECURED TOGETHER TO PROVIDE AN ELONGATED DOUBLE-WALLED, SLEEVE-LIKE DEVICE WHICH IS OPEN AT BOTH ENDS FOR RECEIVING AN EXTREMITY THEREIN, SAID LAMINATED SHEETS BEING SUPERIMPOSED ONE ON THE OTHER AND HERMETICALLY JOINED TOGETHER ADJACENT FOUR MARGINAL EDGES THEREOF TO PROVIDE AN UNINTERRUPTED PRESSURE RECEIVING SPACE THEREBETWEEN, EACH OF SAID LAMINATED SHEETS BEING SUBSTANTIALLY COEXTENSIVE IN LENGTH AND WIDTH AND BOTH OF SAID LAMINATED SHEETS BEING SUPERIMPOSED IN OFF-SET RELATIONSHIP WITH ONE ANOTHER TO PROVIDE A PAIR OF RELATIVELY NARROW SEAMING SURFACES ALONG OPPOSING MARGINAL EDGES THEREOF, SAID LAMINATED SHEETS BEING FOLDED OVER WITH ONE OF SAID SEAMING SURFACES BEING DISPOSED IN OVERLAPPING RELATIONSHIP WITH THE OTHER OF SAID SEAMING SURFACE, AND MEANS HERMETICALLY JOINING THE OVERLAPPING SEAMING SURFACES TOGETHER ADJACENT ONE LONGITUDINAL EDGE THEREOF.