A method of producing an object through solid freeform fabrication preferably includes ejecting drops of different volumes to form a layer of the object. The drops may be binder drops ejected into a build material or may include the build material used to form the object....http://www.google.com/patents/US7700020?utm_source=gb-gplus-sharePatent US7700020 - Methods for producing an object through solid freeform fabrication
