The ornamental design for a backbone for a bloodstorage device, as shown and described.
FIG. 1 is a perspective view of a backbone part for a blood storage device embodying the design.
FIG. 2 is a view of one end of the backbone, taken from the right side end of the view of FIG. 1.
FIG. 3 is a view of another end of the backbone, taken from the left side end of the view of FIG. 1.
FIG. 4 is a view of the front.
FIG. 5 is a view of the rear.
FIG. 6 is a top view; and,
FIG. 7 is a bottom view.
The dot-dot-dash broken lines, the areas within them, and the top and bottom surfaces without shade lines depict portions of the backbone for blood storage device that form no part of the claimed design.
A backbone component as shown is used with a housing that accepts a blood sample.