Sample vessel for centrifuge apparatus

Claim 1

IN CENTRIFUGE APPARATUS INCLUDING MEANS DEFINING A HOLLOW RECEPTACLE FOR RECEIVING A VESSEL CARRYING MATTER TO BE CENTRIFUGES, A SOLID, RIGID REACTION MEMBER ADAPTED TO BE DISPOSED IN SAID RECEPTACLE AND SHAPED TO CONFORM TO THE CONTOUR OF THE TERMINAL WALL SURFACE OF THE RECEPTACLE, SAID REACTION MEMBER HAVING AN UNBROKEN, PLANAR SURFACE FORMED THEREON, A VESSEL FOR CARRYING THE MATTER TO BE CENTRIFUGED COMPRISING A HOLLOW ELONGATED BODY PORTION HAVING UNIFORM WALL THICKNESS ALONG THE LENGTH THEREOF FORMING THE SIDE WALL OF SAID VESSEL, A PLANAR CLOSURE MEMBER OF UNIFORM THICKNESS HAVING TOP AND BOTTOM SURFACES, THE TOP SURFACE BEING FIXED TO AND SEALING ONE END OF THE BODY PORTION TO FORM THE BOTTOM OF THE VESSEL AND SUPPORT THE CONTENTS THEREIN, AND THE BOTTOM SURFACE OF SAID CLOSURE MEMBER BEING SMOOTH AND UNBROKEN, THE UNBROKEN SURFACE OF SAID REACTION MEMBER BEING COEXTENSIVE WITH T HE UNBROKEN SURFACE OF SAID CLOSURE MEMBER AND DISPOSED IN CONFRONTING RELATION THEREOF TO DEFINE A REACTION INTERFACE THEREBETWEEN SERVING TO EVENLY TRANSFER TO THE REACTION MEMBER VIA SAID INTERFACE THOSE CENTRIFUGAL FORCES DEVELOPED IN THE CONTENTS AND SIDE WALL OF THE VESSEL AND IN THE CLOSURE MEMBER.