Patent ID: 6048052
Filing Date: 2000-04-11
Classification: B41J

Abstract:
An ink jet recording head, comprising:a nozzle plate into which a plurality of nozzle openings are formed:means for supplying an ink;a plurality of pressure producing chambers each communicating with said plurality of nozzle openings correspondingly for supplying a pressure to said ink supplied from said ink supply means to jet said ink from said nozzle openings;pressure producing chamber forming members, contacting said nozzle plate and disposed between said pressure producing chambers, for defining said pressure producing chambers;a vibrating plate, contacting said pressure producing chamber forming members and disposed a predetermined distance from said nozzle plate, an upper surface of said vibrating plate defining bottoms of said pressure producing chambers; andreinforcing members, disposed on a lower surface of said vibrating plate, for reinforcing said vibrating plate, at least one of said reinforcing members corresponding to said pressure producing chamber forming members,wherein said plurality of nozzle openings comprise at least four rows of nozzle openings arranged in a main scanning direction, said rows being arranged in groups, each group comprising a pair of adjacent rows, a first space between adjacent rows of the same pair being smaller than a second space between adjacent rows of different pairs, each row having a plurality of nozzle openings so as to extend straightly in a sheet forward direction at a pitch corresponding to the number of nozzle opening rows, and the rows of nozzle openings in an auxiliary scanning direction are staggered at a certain pitch so that an order of arrangement of the rows of nozzle openings is different from the physically arranged order,and wherein said pressure producing chamber forming members are disposed beneath said nozzle plate between adjacent rows of the same pair,said ink jet recording head further comprisingvibrator elements, each having one end in contact with said vibrator plate and respectively arranged beneath said pressure producing chambers; andfixed plates for providing support to said vibrator elements, wherein each row of vibrator elements is supported by a corresponding fixed plate.