Rack for hematocrit tubes

Claim 1

A RACK FOR SLENDER GLASS TUBES COMPRISING A GENERALLY CYLINDRICAL SHELL MEMBER OF RELATIVELY STIFF CARDBOARD MATERIAL OPEN AT ITS TOP END ADAPTED TO STAND IN AN UPRIGHT POSITION ON A HORIZONTAL SUPPORTING SURFACE, A RELATIVELY YIELDABLE VERTICAL ROLLED-UP SUPPORTING CORE OF VERTICALLY CORRUGATED RELATIVELY FLEXIBLE PAPER MATERIAL SNUGLY AND TIGHTLY ENCLOSED IN SAID SHELL MEMBER, SAID CORE BEING NORMALLY SLIGHTLY LARGER IN DIAMETER THAN THE INSIDE OF THE SHELL MEMBER, SAID CORE BEING ADAPTED TO CLAMPINGLY RECEIVE THE TUBES BETWEEN ADJACENT CONVOLUTIONS THEREOF IN THE VERTICAL GROOVES DEFINED BY THE CORRUGATIONS AND TO CLAMPINGLY SUPPORT THE TUBES IN INVERTED READILY ACCESSIBLE POSITIONS A CORRUGATED PAPER BAND SURROUNDING THE OUTER SURFACE OF THE SHELL MEMBER AND HAVING OUTWARDLY FACING VERTICAL CORRUGATIONS, AND AN ELASTIC BAND SURROUNDING SAID PAPER BAND AND BEING ADAPTED TO CLAMPINGLY ENGAGE TUBES DISPOSED IN THE VERTICAL GROOVES DEFINED BY THE CORRUGATIONS OF THE PAPER BAND AND TO SUPPORT SAID LASTNAMED TUBES IN UPRIGHT POSITIONS, SAID CORRUGATED PAPER BAND BEING SUBSTANTIALLY LOWER IN HEIGHT THAN THE SHELL MEMBER, WHEREBY THE UPPER PORTION OF THE SHELL MEMBER WILL PROVIDE A VISUAL BACKGROUND FOR THE UPPER PORTIONS OF THE TUBES.