Nanodynamics, Inc.

Chi-Chung Hsu

Ming-Hsun Yang

Chen-Hua Lin

Wen-Chung Chen

A printhead includes a silicon substrate, a first barrier layer, a second barrier layer, and a nozzle plate. The silicon substrate has a plurality of thermal elements and a main ink supply channel, each of the thermal elements being in a firing chamber of the first barrier layer and in fluid communications with the main ink supply channel through ink channels. The top of each ink firing elements is aligned with a nozzle on the nozzle plate. To satisfy the need for high-frequency ink ejection, the second barrier layer is utilized to provide an auxiliary ink supply channel for increasing the ink supply speed. The ink channel between the main ink supply and the ink channel inlet is enlarged in the vertical direction so as to lower the pressure and thus increase the ink supply speed.

Ink supply structure for inkjet printhead

A printhead includes a silicon substrate, a first barrier layer, a second barrier layer, and a nozzle plate. The silicon substrate has a plurality of thermal elements and a main ink supply channel, each of the thermal elements being in a firing chamber of the first barrier layer and in fluid communications with the main ink supply channel through ink channels. The top of each ink firing elements is aligned with a nozzle on the nozzle plate. To satisfy the need for high frequency ink ejection, the second barrier layer is utilized to provide an auxiliary ink supply channel for increasing the ink supply speed. The ink channel between the main ink supply and the ink channel inlet is enlarged in the vertical direction so as to lower the pressure and thus increase the ink supply speed.

An air pressure regulating device for ink cartridges that is not affected or interfered with by magnetic fields. In accordance with the invention a ventilating vent is settled inside the ink cartridge so that the inside region of the ink cartridge is open to the ambient air and at the same time this ventilating vent is also directed to a fixed seat. In the fixed seat a gas vent is settled to direct to the ink cartridge. On the outside region of the gas vent settled in the fixed seat a layer of elastic gastight material is covered such that it can be utilized to seal the gas vent to keep the ink cartridge sealed under ordinary conditions. When the pressure difference between the outside and inside regions of the ink cartridge reaches a critical value, the layer of the elastic gastight material is slightly pushed away so that a small quantity of air can flow into the ink cartridge to return the pressure to within a normal operating range.

Growing community of inventors

Ilan Hsien, Taiwan

Chi-Chung Hsu