  In this paper we construct developable surface patches which are bounded by
two rational or NURBS curves, though the resulting patch is not a rational or
NURBS surface in general. This is accomplished by reparameterizing one of the
boundary curves. The reparameterization function is the solution of an
algebraic equation. For the relevant case of cubic or cubic spline curves, this
equation is quartic at most, quadratic if the curves are Bezier or splines and
lie on parallel planes, and hence it may be solved either by standard
analytical or numerical methods.
