Patent ID: 6789877
Filing Date: 2004-09-14
Classification: B41J

Abstract:
An ink-jet printing head comprising:a plurality of nozzles through which ink is ejected; a plurality of ejection energy generating members provided in correspondence with said plurality of nozzles to generate ejection energy used to eject ink through said plurality of nozzles; a plurality of ink channels which are in communication with said plurality of nozzles and which are provided with said plurality of ejection energy generating members; and an ink supply port through which ink is supplied to said plurality of ink channels, wherein said plurality of nozzles include larger-diameter nozzles and smaller-diameter nozzles, the number of smaller-diameter nozzles being larger than that of larger-diameter nozzles, said plurality of ink channels include first ink channels in communication with said larger-diameter nozzles and second ink channels in communication with said smaller-diameter nozzles, and said first ink channels and said second ink channels are mixed and arranged along said ink supply port so that a group of smaller-diameter nozzles composed of a plurality of said smaller-diameter nozzles is arranged between said larger-diameter nozzles.