Ink-jet printing apparatus and ink cartridge

An ink supply system for a printing apparatus providing ink to a printing head through a tapered ink supply needle, said ink supply system capable of providing ink contained in an ink chamber to the print head through the ink supply needle, comprising:

• an ink channel for providing ink from said ink chamber to the print head of the printing apparatus;
• a first member provided at said ink channel, forming a part of maid ink channel for allowing a flow of ink, said first member sealing the ink supply needle of the ink printing apparatus by fitting therewith;
• and
• a second member contained in said ink channel elastically abutting against said first member in a direction which is the same as a direction of the sealing by said first member with said second member, said second member selectively opening and closing said ink channel upon moving up and down respectively in conjunction with the ink supply needle;
• wherein said second member comprises a surface, facing said first member, provided with a notch, said notch having an angle defined in conjunction with the tapered angle of the ink supply needle.

An ink supply system for a printing apparatus providing ink to a printing head through a tapered ink supply needle, said ink supply system capable of providing ink contained in an ink chamber to the print head through the ink supply needle, comprising:

• an ink channel for providing ink from said ink chamber to the print head of the printing apparatus;
• a first member provided at said ink channel, forming a part of said ink channel for allowing a flow of ink, said first member sealing the ink supply needle of the ink printing apparatus by fitting therewith;
• and
• a second member contained in said ink channel elastically abutting against said fist member in a direction which is the same as a direction of the sealing by said first member with said second member, said second member selectively opening and closing said ink channel in conjunction with the ink supply needle;
• wherein said second member comprises a guide body operably allowing said second member to slide substantially vertically with respect to said first member, said guide body operably suppressing a horizontal deviation of said second member and said guide body extending from said second member in a direction substantially parallel with said ink channel.

An ink supply system for a printing apparatus providing ink to a printing head through a tapered ink supply needle, said ink supply system capable of providing ink contained in an ink chamber to the print head through the ink supply needle, comprising:

• an ink channel for providing ink from said ink chamber to the print head of the printing apparatus;
• a first member provided at said ink channel, forming a part of said ink channel for allowing a flow of ink, said first member sealing the ink supply needle of the ink printing apparatus by fitting therewith;
• and
• a second member contained in said ink channel elastically abutting against said first member in a direction which is the same as a direction of the sealing by said first member with said second member, said second member selectively opening and closing said ink channel in conjunction with the ink supply needle;
• wherein said second member comprises a guide rod extending along a direction to the ink chamber, and a guide unit fitting with said second member for allowing said second member to slide along the direction of the sealing of said first member with said second member.

An ink supply system for a printing apparatus providing ink to a printing head through a tapered ink supply needle, said ink supply system capable of providing ink contained in an ink chamber to the print head through the ink supply needle, comprising:

• an ink channel for providing ink from said ink chamber to the print head of the printing apparatus;
• a first member provided at said ink channel, forming a part of said ink channel for allowing a flow of ink, said first member sealing the ink supply needle of the ink printing apparatus by fitting therewith;
• and
• a second member contained in said ink channel elastically abutting against said first member in a direction which is the same as a direction of the sealing by said first member with said second member, said second member selectively opening and closing said ink channel in conjunction with the ink supply needle;
• wherein said second member comprises a surface, facing said first member, provided with a notch, said notch having an angle defined in conjunction with the tapered angle of the ink supply noodle;
• and
• wherein the angle of said notch is the same as the tapered angle of the ink supply needle.