Method and apparatus for three-dimensional fabrication of continuous sheets of material

An apparatus for forming a three-dimensional object comprising a continuous sheet of material from a polymerizable liquid, the apparatus comprising:

• (a) an optically transparent member having a build surface, with the build surface at least partially defining the build region;
• (b) first and second drive rollers on opposite sides of and adjacent the build surface;
• (c) a liquid polymer supply in fluid communication with and configured to supply a liquid polymer or polymerizable liquid into the build region for solidification or polymerization;
• (d) a radiation source configured to irradiate the build region through the optically transparent member to form a solid polymer from the polymerizable liquid;
• and
• (e) at least one controller operatively associated with the first and second drive rollers and the radiation source for rotating the first and second drive rollers to form the three-dimensional object from the solid polymer and to advance the continuous sheet of material away from the build surface.