Very innovative, complex and maneuverable 3d printer designs that has 6 articulated movement sources that enable printhead to print in six axis space. It demonstrates printing on angled and curved surfaces.
Information about this concept is limited to this video, if anyone knows more, let me know.
Source:
http://www.youtube.com/user/YongChenUSC?feature=watch
Looks like it is posted by Yong Chen of USC Viterbi School f Engineering
http://www.usc.edu/dept/ise/directory/yong_chen.htm
http://www-bcf.usc.edu/~yongchen/Research.htm