Recording apparatus and recording head having an improved discha

Details Recording apparatus and recording head having an improved discha Recording apparatus and recording head having an improved discha

1991-02-01

1992-12-29

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

B41J 2145

Patent

active

051755670

ABSTRACT:
An ink jet recording head comprises a plurality of ink discharge ports for discharging ink, a plurality of ink paths each communicating with one of the discharge ports and a thermal energy generating device provided in each ink path for generating thermal energy to be applied to the ink. The discharge ports are so arranged that the opening areas of the liquid discharge ports located at both end regions in an arrangement direction of the discharge ports are larger than that of the liquid discharge ports located at a central region. Inconsistencies in the size of ink droplets discharged from the discharge ports, can, therefore, be prevented. Such size differentials could have occurred due to the difference of viscosity that is caused because the temperature of the ink is higher at the central region and lower at both end regions. A recorded image having no unevenness in recording density can be formed.

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