Hinged plastic box

Claim 1

A HINGED BOX STRUCTURE HAVING ALL OF ITS HEREINAFTER STATED PARTS INTEGRALLY INTERCONNECTED AND FORMING HOMOGENEOUS PORTIONS OF A UNITARY STRUCTURE OF RESILIENTLY FLEXIBLE MATERIAL, COMPRISING A BOX BODY MEMBER, A BOX COVER MEMBER, HINGE MEANS INTERCONNECTING SAID MEMBERS FOR RELATIVE SWINGING MOVEMENT INTO AND FROM A CLOSED POSITION ABOUT AN AXIS SPACED EQUIDISTANTLY FROM THE RESPECTIVE MEMBERS AND OUTSIDE OF SAID BOX STRUCTURE, POSITIONING ELEMENTS FIXEDLY CARRIED BY THE RESPECTIVE MEMBERS, ONE OF SAID ELEMENTS BEING POSITIONED WHOLLY ON ONE SIDE OF SAID AXIS, AND HAVING A FREE END PROJECTING TOWARD BUT SPACED FROM SAID AXIS TO MOVE IN AN ARC THEREAROUND INCIDENT TO RELATIVE SWINGING OF SAID BOX MEMBERS, THE OTHER SAID ELEMENT PROJECTING ACROSS THE SAID AXIS AND HAVING A FREE END POSITIONED TO INTERSECT THE ARCUATE PATH OF MOVEMENT DESCRIBED BY THE FREE END OF SAID ONE ELEMENT AT A SUITABLE POINT IN THE RELATIVE SWINGING MOVEMENT OF SAID MEMBERS, ONE OF SAID ELEMENTS BEING RESILIENTLY RADIALLY YIELDABLE RELATIVE TO SAID AXIS AND OF A LENGTH TO PERMIT FREE ENDS OF SAID ELEMENTS TO OVERRIDE EACH OTHER WITHOUT DAMAGE INCIDENT TO THE EXERTION OF A SUFFICIENT SWINGING FORCE ON SAID MEMBERS.