Packages for products wound on bobbins

Claim 1

A PACKAGE FOR PRODUCTS WOUND ON A BOBBIN HOUSED THEREIN, COMPRISING A PAIR OF DISH MEMBERS OF ELASTIC MATERIAL HAVING A SUBSTANTIALLY AXIAL FLANGE AT THEIR CIRCUMFERENCE AND MOUNTED WITH FACING FLANGES ON EACH SIDE OF SAID BOBBIN ON A COMMON AXIS, SAID DISH MEMBERS BEING IN A FIRST STABLE CONDITION OF SHAPE, IN WHICH THEIR OUTER SIDES ARE CONCAVE AND THE PACKAGE IS OPEN, COUPLING MEANS EXTENDING THROUGH THE CENTER OF SAID BOBBIN AND INTERCONNECTING SAID PAIR OF DISH MEMBERS, AND CONCENTRIC SPACING MEANS FOR HOLDING SAID DISH MEMBERS WITH THEIR FLANGES SPACED WHEN THE PACKAGE IS OPEN, SO AS TO ALLOW THE PRODUCT TO BE WITHDRAWN FROM THE BOBBIN BETWEEN SAID DISH MEMBERS, SAID PAIR OF DISH MEMBERS UNDER OPPOSED AXIAL PRESSURES APPLIED CIRCUMFERENTIALLY BEING CAPABLE OF SNAPPING OVER FROM SAID FIRST STABLE CONDITION OF SHAPE TO SECOND STABLE CONDITION OF SHAPE, IN WHICH THEIR OUTER SIDES ARE CONVEX AT LEAST AT THE CENTER PORTION THEREOF AND THE FLANGES ABUT EACH OTHER AT THEIR EDGES SO AS TO CLOSE THE PACKAGE, WHILE UNDER OPPOSED AXIAL PRESURES APPLIED CENTRALLY SAID DISH MEMBERS BEING CAPABLE OF SNAPPING BACK FROM SAID SECOND STABLE CONDITION OF SHAPE TO SAID FIRST STABLE CONDITION OF SHAPE, SAID SPACING MEANS CONSISTING OF AN AXIAL RIM INTERGRAL WITH THE BOBBIN AT EACH SIDE OF THE SAME AND HAVING A DIAMETER AND AN AXIAL EXTENT SO AS TO CONSTITUTE SUPPORT MEANS FOR SAID PAIR OF DISH MEMBERS TO PROVIDE SAID SNAP-ACTION OF THE SAME, SAID FLANGES HAVING A RADIAL EXTERNAL STIFFENING RIM AT THEIR FREE EDGE, AND SAID COUPLING MEANS CONSISTING OF A PIN AND SOCKET JOINT COMPRISING A SOCKET EXTENDING INWARDLY FROM THE CENTER OF ONE OF SAID DISH MEMBERS AND AT ITS FREE END FORMED WITH AN INTERNAL ANNULAR RIB, LEAVING AN OPENING FOR ACCOMMODATING A PIN EXTENDING INWARDLY FROM A CENTRAL BOSS ON THE OTHER DISH MEMBER AND HAVING AN EXTERNAL COLLAR AT ITS FREE END, SAID PIN BEING INTRODUCED INTO SAID SOCKET FOR ALLOWING A MUTUAL AXIAL MOVEMENT OF THE CENTER PORTIONS OF SAID PAIR OF DISH MEMBERS DURING THEIR SNAP-ACTION.