Patent ID: 7537327
Filing Date: 2009-05-26
Classification: B01D,B41J,Y10T

Abstract:
1. An internal liquid filter, comprising: a first substrate; a second substrate; a first layer and a second layer provided between the first and second substrates; a plurality of first and second passages provided in the first layer; and a plurality of third passages provided in the second layer, each third passage extending between and fluidly connected to one of the first passages and one of the second passages, wherein liquid can flow into the one of the first and second passages, from the one of the first and second passages into the third passages, and from the third passages into the other of the first and second passages, such that particles having a size greater than that which can pass through the third passages are filtered from the liquid, wherein the third passages are each bounded on one side by the second substrate, on two sides by the second layer, and on a fourth side by the first layer.