Liquid jet print head and liquid jet printing apparatus

A liquid jet print head capable being installed in a liquid jet printing apparatus, comprising:

• a printing unit including:
• a printing device array having a plurality of nozzles for ejecting print liquid and a plurality of printing devices;
• and a supporting member, to which said printing device array is attached, having a print liquid flow path for supplying print liquid to said printing device array, said printing unit adapted to be capable of sending electric signals for printing to said printing device array;
• and
• a print liquid storage unit connectable to said printing unit, said print liquid storage unit storing print liquid for said printing unit,
• wherein said printing unit includes a first-direction reference portion, a second-direction reference portion and a third-direction reference portion which can be used as three-dimensional positioning references when said print head is installed in said liquid jet printing apparatus, and wherein a reference for positioning to align and fix said printing device array in a predetermined position of said supporting member is used as at least one of said first-direction reference portion, said second-direction reference portion and said third-direction reference portion.

A liquid jet print head comprising:

• a printing device substrate having an array of a plurality of nozzles for ejecting print liquid and a plurality of printing devices arranged in correspondence with said plurality of nozzles;
• and
• a supporting member for supporting said printing device substrate and having a print liquid flow path for supplying print liquid to said nozzles,
• wherein said supporting member includes a plurality of projections arranged along said array of nozzles, said projection capable of being in contact with a predetermined position of said liquid jet printing apparatus when said print head is installed in said liquid jet printing apparatus.

A liquid jet printing apparatus comprising;

• a liquid jet print head capable of ejecting print liquid;
• and
• a carriage supporting said liquid jet print head and capable of being scanned in a main scanning direction, said carriage being scanned to form an image on a print medium by ejecting print liquid from said print head,
• wherein said liquid jet print head comprising:
• a printing unit including:
• a printing device array having a plurality of nozzles for ejecting print liquid and a plurality of printing devices;
• and a supporting member, to which said printing device array is attached, having a print liquid flow path for supplying print liquid to said printing device array, said printing unit adapted to be capable of sending electric signals for printing to said printing device array;
• and
• a print liquid storage unit connectable to said printing unit, said print liquid storage unit storing print liquid for said printing unit,
• wherein said supporting member is formed to define a reference plane for determining the amount of tilting of an array of said nozzles with respect to said supporting member when said printing device array is aligned and fixed to a predetermined position of said supporting member, and wherein said reference plane can be used as a reference for positioning when said print head is installed in said liquid jet printing apparatus.

A liquid jet printing apparatus comprising:

• a liquid jet print head capable of ejecting print liquid;
• and
• a carriage supporting said liquid jet print head and capable of being scanned in a main scanning direction, said carriage being scanned to form an image on a print medium by ejecting print liquid from said print head,
• wherein said liquid jet print head comprising:
• a printing unit including:
• a printing device array having a plurality of nozzles for ejecting print liquid and a plurality of printing devices;
• and a supporting member, to which said printing device array is attached, having a print liquid flow path for supplying print liquid to said printing device array, said printing unit adapted to be capable of sending electric signals for printing to said printing device array;
• and
• a print liquid storage unit connectable to said printing unit, said print liquid storage unit storing print liquid for said printing unit,
• wherein said printing unit includes a first-direction reference portion, a second-direction reference portion and a third-direction reference portion which can be used as three-dimensional positioning references when said print head is installed in said carriage, and wherein a reference for positioning to align and fix said printing device array in a predetermined position of said supporting member Is used as at least one of said first-direction reference portion, said second-direction reference portion and said third-direction reference portion.

A liquid jet printing apparatus comprising:

• a plurality of liquid Jet print heads, each of said print heads including:
• a printing device substrate having an array of a plurality of nozzles for ejecting print liquid and a plurality of printing devices arranged in correspondence with said plurality of nozzles;
• and a supporting member for supporting said printing device substrate and having a print liquid flow path for supplying print liquid to said nozzles,
• wherein said supporting member includes a plurality of projections arranged along said array of nozzles, said projection capable of being in contact with a predetermined position of said liquid jet printing apparatus when said print head is installed in said liquid jet printing apparatus, and wherein said print heads are installed in said liquid jet printing apparatus so that said arrays of nozzles are in parallel with each other.