Patent ID: 9440398
Filing Date: 2016-09-13
CPC Classification: B29C,B33Y,G01F

Claim Text:
1. An automatic liquid supply apparatus, for supplying liquid material during 3D printing, the automatic liquid supply apparatus comprising: a container including an accommodating space for containing the liquid material, the accommodating space including a trench and a recess communicating with each other, the trench including an inner bottom face, the recess being recessed to a depth below the inner bottom face, wherein the trench includes a plurality of inner walls surrounding the periphery of the inner bottom face, and the recess is adjacent to one of the inner walls; a liquid level sensor including a floater, the floater being disposed corresponding to the recess and floating on the liquid material to generate floating movement along with a liquid level of the liquid material, the liquid level sensor sensing the liquid level of the liquid material in the accommodating space according to the floating movement of the floater; and a liquid dispenser electrically connected to the liquid level sensor, the liquid dispenser selectively supplying or stopping supplying the liquid material into the accommodating space according to the sensed liquid level.