  In this paper, we consider a method of constructing isothermic surfaces based
on Ribaucour transformations. By applying the theory to the cylinder, we obtain
a three-parameter family of complete isothermic surfaces that contains n-bubble
surfaces inside and outside of the cylinder. In addition, we also obtain
one-parameter family of complete isothermic surface with planar ends. Such
family of isothermic surfaces do not have constant mean curvature. As
aplication we obtain explicit solutions of the Calapso equation.
