Patent ID: 7922924
Filing Date: 2011-04-12
Classification: B41J,Y10T

Abstract:
1. A method of manufacturing an internal filter, comprising: providing a first substrate; providing a second substrate; forming a plurality of first passages in the first substrate; forming a plurality of second passages in the first substrate; forming a plurality of third passages in one of the first substrate and the second substrate; and placing the first and second substrates adjacent to each other, such that the plurality of third passages extend between, and directly connect to, the first and second passages and fluidly connect the first and second passages such that particles having a size that can pass through the third passages pass through the third passages, while particles larger than the particles having a size that can pass through the third passages are filtered from the fluid when the fluid flows through the first passages, into and through the third passages, and into the second passages, and every fluidic connection between a first passage and a second passage comprises two or more third passages, wherein the internal filter comprises the plurality of first passages, the plurality of second passages, and the plurality of third passages, and forming the first and second passages in the first substrate comprises forming at least some of the first passages and at least some of the second passages to extend completely through the first substrate.