Patent ID: 6511160
Filing Date: 2003-01-28
Classification: B41J

Abstract:
A thermal ink-jet head comprising:a heater substrate having heating elements that produce bubbles; a channel substrate having a plurality of nozzle flow channels, an ink reservoir, the ink reservoir being common to communicating directly with each nozzle flow channel, a plurality of ink supply ports, and a slanted wall, wherein each of said nozzle flow channels is formed in said channel substrate, said nozzle flow channels being located above said heating elements and extending substantially to an end portion of said heating elements, said end portion being proximate to said ink reservoir, an ink flow channel is provided in at least said heater substrate, the ink flow channel extending substantially from the end of said heating elements to said ink reservoir, and a throttle portion is formed within said ink flow channel, the throttle portion having a sectional area that decreases in size between said heating elements and said ink reservoir, said throttle portion being defined in said heater substrate and between said heater substrate and said slanted wall of said channel substrate.