Electro-photographic 3-D printing using collapsible substrate

A three-dimensional (3-D) printer comprising:

• an intermediate transfer belt (ITB);
• a first photoreceptor positioned to electrostatically transfer a first material to said ITB;
• a second photoreceptor positioned to electrostatically transfer a second material to a location of said ITB where said first material is located on said ITB, said second material dissolves in different solvents relative to solvents that dissolve said first material;
• a platen moving relative to said ITB;
• a sheet feeder positioned to feed sheets of collapsible media to said platen, said platen repeatedly moves toward said ITB to have a sheet of collapsible media positioned on said platen repeatedly contact said ITB, said ITB electrostatically transfers a layer of said first material and said second material to said sheet of collapsible media each time said platen contacts said sheet of collapsible media with said ITB to successively form layers of said first material and said second material on said sheet of collapsible media, said layer of said first material and said second material is on a discrete area of said ITB and is in a pattern;
• a stabilization station adjacent said platen, said platen moves to said stabilization station after each time said ITB transfers each of said layers to said sheet of collapsible media to independently stabilize each of said layers of said first material and said second material on said sheet of collapsible media;
• a platform positioned to receive, from said platen, said freestanding stack to successively form a 3-D structure of freestanding stacks of said layers of said first material and said second material on said sheet of collapsible media;
• and
• a bonding station positioned to apply heat, pressure, and/or light to said 3-D structure to bond said freestanding stacks to one another through said sheets of collapsible media on said platform.