Patent ID: 9539762
Date: 2017-01-10
CPC Classifications: B29C,B29K,B29L,B33Y

Claim:
1. A three dimensional printer, comprising: a non-square rectangular build platform for receiving a part deposited by a three dimensional printing process; a movable stage supporting the build platform; a kinematic coupling between the build platform and movable stage which holds said build platform, comprising: a print pause circuit that pauses three dimensional printing; a completion level detection circuit that responds to a preset level of completion of a part to activate the print pause circuit; removal circuit that responds to the print pause circuit to present the build platform to be removed; a print resume circuit that resumes printing of additional printed layers; and a return detection circuit that responds to an input associated with the return of the build platform to activate the print resume circuit, wherein the three curved protrusions are arranged in a non-equilateral triangle in a plane about the perimeter of the non-square rectangular build platform such that one side of the triangle is longer than the remaining two.