Filament wound container

Claim 1

A FILAMENT WOUND STRUCTURE HAVING AN ELONGATED BODY PORTION AND A BULGING END, COMPRISING FILAMENTS AND A BINDER, SAID FILAMENTS BEING ARRANGED IN GIRTH WINDINGS ALONG SAID ELONGATED BODY PORTION AND IN END WINDINGS PASSING OVER SAID BODY PORTION AND OVER THE ENDS OF SAID STRUCTURE, EACH CIRCUIT OF SAID END WINDINGS LYING ALONG A PATH THAT PASSES OVER BOTH ENDS AND THE ELONGATED BODY PORTION OF THE STRUCTURE, EACH SAID PATH MEETING ITSELF ONLY ONCE IN EACH COMPLETE CIRCUIT OF SAID STRUCTURE, AT LEAST ONE LAYER IN SAID STRUCTURE BEING COMPOSED OF A PLURALITY OF SAID CIRCUITS OF END WINDINGS IN WHICH EACH END WINDING CIRCUIT IN SAID LAYER IS CONTIGUOUS TO THE IMMEDIATELY PRECEDING AND IMMEDIATELY FOLLOWING END WINDING CIRCUITS THROUGHOUT SUBSTANTIALLY THE ENTIRE LENGTH OF SAID CIRCUITS, EACH SUCH END WINDING BOUNDING IN ONE COMPLETE CIRCUIT A SURFACE WHICH IS SUBSTANTIALLY PLANE, SAID SUBSTANTIALLY PLANE SURFACE OF THE END WINDING PASSING ONLY ONCE THROUGH THE AXIS OF THE STRUCTURE, AND THE LENGTH OF THE END WINDINGS ON THE ELONGATED BODY PORTION FORMING AN ANGLE AT EACH POINT ALONG SAID LENGTH WITH A LINE FORMED BY THE INTERSECTION OF AN AXIAL PLANE THROUGH THE STRUCTURE AND THE SURFACE OF SAID ELONGATED BODY PORTION WHICH ANGLE IS LESS THAN THE ANGLE WHOSE TANGENT IS EQUAL TO ONEHALF THE QUOTIENT OF THE CIRCUMFERENCE OF SAID ELONGATED BODY PORTION AT AN END THEREOF DIVIDED BY THE LENGTH OF SAID BODY PORTION.