Patent ID: 6264305
Filing Date: 2001-07-24
Classification: B41J

Abstract:
A recording head assembly for ejecting ink to effect recording on a recording material while moving in a main scanning direction relative to the recording material, comprising:a first group of ejection outlet blocks including a plurality of election outlets arranged substantially in a subscan direction, which is different from the main scanning direction, for ejecting record improving liquid for improving record property on the recording material, the record improving liquid including at least one agent for making coloring material in the ink insoluble or coagulated;a second group of ejection outlet blocks arranged substantially in the subscan direction, each of said ejection outlet blocks in the second group including a plurality of ejection outlets arranged substantially in the subscan direction, said ejection outlet blocks in the second group being effective to eject through the ejection outlets therein first inks of different colors having first densities, respectively; anda third group of ejection outlet blocks arranged substantially in the subscan direction, each of said ejection outlet blocks in the third group including a plurality of ejection outlets arranged substantially in the subscan direction, said ejection outlet blocks in the third group being effective to eject through the ejection outlets therein second inks of different colors, the second inks having the same colors as the first inks, respectively, and the second inks having second densities which are lower than the first densities, respectively,wherein said first group of ejection outlet blocks, said second group of ejection outlet blocks and said third group of ejection outlet blocks are disposed in said recording head assembly and arranged side by side in a predetermined order in the main scanning direction, and said first group of ejection outlet blocks is disposed at an upstream side position with respect to the main scanning direction and said second group of ejection outlet blocks and said third group of ejection outlet blocks are disposed at a downstream side position with respect to the main scanning direction such that the record improving liquid is first ejected on the recording material and subsequently the inks are ejected thereon when recording is performed.