Liquid jet head with a movable member, head cartridge using the liquid jet head, liquid jet apparatus and liquid discharging method

A liquid discharging method, comprising the steps of:

• preparing a liquid jet head provided with discharge ports formed in discharge port formation areas for discharging liquid, liquid flow paths conductively connected with said discharge ports, bubble generating areas for creating bubbles in said liquid, and movable members arranged to face said bubble generating areas, each said movable member having a free end in a position relatively near to a respective one of said discharge ports with respect to a fulcrum thereof;
• causing each said movable member to be arranged at a position where the free end of each said movable member releases each said bubble generating area partly to said respective discharge port so as to enable a tangential line of the free end of each said movable member or an extended line thereof to reach directly a respective one of said discharge port formation areas at a liquid flow path side before the creation of a bubble on each said bubble generating area;
• and
• with this position as a reference, moving each said movable member following the creation of a bubble on each said bubble generating area.

A head cartridge, comprising:

• a liquid jet head provided with discharge ports formed in discharge port formation areas for discharging liquid, liquid flow paths conductively connected with said discharge ports, bubble generating areas for creating bubbles in said liquid, and movable members arranged to face said bubble generating areas, each said movable member having a free end in a position relatively near to a respective one of said discharge ports with respect to a fulcrum thereof,
• each said movable member being arranged at a position where the free end of each said movable member is located such that each said bubble generating area is in fluid communication with said respective discharge port such that a line tangent to the free end of each said movable member reaches directly a respective one of said discharge port formation areas at a liquid flow path side before the creation of a bubble on each said bubble generating area, and with this position as a reference, each said movable member moves after the creation of the bubble on each said bubble generating area;
• and
• a liquid container containing a liquid for supply to said liquid jet head.

A head cartridge, comprising:

• a liquid jet head provided with first liquid flow paths conductively connected with discharge ports formed in discharge port formation areas for discharging liquid, second liquid flow paths having bubble generating areas to give heat to liquid so as to create a bubble in said liquid, and movable members arranged to face said bubble generating areas, each said movable member having a free end in a position relatively near to a respective one of said discharge ports with respect to a fulcrum thereof, the free end having a tangential line,
• the free end of each said movable member being positioned so that each said second liquid flow path and each said first liquid flow path are in fluid communication by arranging each said movable member so that said tangential line reaches directly a respective one of said discharge port formation areas at a liquid flow path side before the creation of the bubble which displaces each said movable member through the pressure exerted by the creation of the bubble on each said bubble generating area;
• and
• a liquid container containing a liquid for supply to said liquid jet head.

A liquid jet apparatus, comprising:

• a liquid jet head provided with discharge ports formed in discharge port formation areas for discharging liquid, liquid flow paths conductively connected to face bubble generating areas, each said movable member having a free end in a position relatively near to a respective one of said discharge ports with respect to a fulcrum thereof,
• each said movable member being arranged at a position where the free end of each said movable member is located such that each said bubble generating area is in fluid communication with said respective discharge port such that a line tangent to the free end of each said movable member reaches directly a respective one of said discharge port formation areas at a liquid flow path side before the creation of the bubble on each said bubble generating area, and with this position as a reference, each said movable member moves after the creation of the bubble on each said bubble generating area;
• and
• means for carrying a recording medium past said liquid jet head to receive liquid discharged from said liquid jet head.

A liquid jet apparatus, comprising:

• a liquid jet head provided with first liquid flow paths conductively connected with discharge ports formed in discharge port formation areas for discharging liquid, second liquid flow paths having bubble generating areas to give heat to liquid so as to create a bubble in said liquid, and movable members arranged to face said bubble generating areas, each said movable member having a free end in a position relatively near to a respective one of said discharge ports with respect to a fulcrum thereof, the free end having a tangential line,
• the free end of each said movable member being disposed such that each said second liquid flow path and each said first liquid flow path are in fluid communication by arranging each said movable member so that said tangential line reaches directly a respective one of said discharge port formation areas at a liquid flow path side before the creation of the bubble when each said movable member is not displaced following the pressure exerted by the creation of the bubble on each said bubble generating area;
• and
• means for carrying a recording medium to carry a recording medium past said liquid jet head to receive liquid discharged from said liquid jet head.

A head kit, including:

• a liquid jet head provided with first liquid flow paths conductively connected with discharge ports formed in discharge port formation areas for discharging liquid, second liquid flow paths having bubble generating areas to give heat to liquid so as to create a bubble in said liquid, and movable members arranged to face said bubble generating areas, each said movable member having a free end in a position relatively near to a respective one of said discharge ports with respect to a fulcrum thereof, the free end having a tangential line,
• the free end of each said movable member being disposed such that each said second liquid flow path and each said first liquid flow path are in fluid communication by arranging each said movable member so that said tangential line reaches directly a respective one of said discharge port formation areas at a liquid flow path side before the creation of the bubble when each said movable member is not displaced following the pressure exerted by the creation of the bubble on each said bubble generating area;
• and
• a liquid container containing a liquid for supply to said liquid jet head.

A head kit, comprising:

• a liquid jet head provided with discharge ports formed in discharge port formation areas for discharging liquid, liquid flow paths conductively connected with said discharge ports, bubble generating areas for creating bubbles in said liquid, and movable members arranged to face said bubble generating areas, each said movable member having a free end in a position relatively near to a respective one of said discharge ports with respect to a fulcrum thereof,
• each said movable member being arranged at a position where the free end of each said movable member is located such that each said bubble generating area is in fluid communication with said respective discharge port such that a line tangent to the free end of each said movable member reaches directly a respective one of said discharge port formation areas at a liquid flow path side before the creation of the bubbles on each said bubble generating area, and with this position as reference, each said movable member moves after the creation of the bubbles on each said bubble generating area;
• a liquid container containing a liquid for supply to said liquid jet head;
• and
• means for filling liquid into said liquid container.

A head kit, comprising:

• a liquid jet head provided with first liquid flow paths conductively connected with discharge ports formed in discharge port formation areas for discharging liquid, second liquid flow paths having bubble generating areas to give heat to liquid so as to create a bubble in said liquid, and movable members arranged to face said bubble generating areas, each said movable member having a free end in a position relatively near to a respective one of said discharge ports with respect to a fulcrum thereof, the free end having a tangential line,
• the free end of each said movable member being disposed such that each said second liquid flow path and each said first liquid flow path are in fluid communication by arranging each said movable member so that said tangential line reaches directly a respective one of said discharge port formation areas at a liquid flow path side before the creation of the bubble when each said movable member is not displaced following the pressure exerted by the creation of the bubble on each said bubble generating area;
• and
• a liquid container containing a liquid for supply to said liquid jet head;
• and
• means for filling liquid into said liquid container.