Ink container having atmosphere communicating section and recording head

An ink jet head comprising a recording head for discharging recording liquid and a tank having ink storage means for storing said recording liquid in an interior thereof, said recording head and said tank being integral with each other, and said tank further having a buffer chamber communicating with said ink storage means and atmosphere communicating means for equalizing atmospheric pressure and pressure in said interior of said ink storage means, wherein said atmosphere communicating means includes:

• a plurality of chambers;
• a port communicating each of said chambers with another of said chambers;
• an opening communicating one of said chambers with said interior of said ink storing means through the buffer chamber, said opening having a tubular configuration projecting into the buffer chamber;
• and
• a vent communicating another of said chambers with atmosphere.

An ink jet apparatus comprising:

• an ink container having an ink containing section for containing ink, a buffer chamber communicating with said ink containing section and an atmosphere communicating section communicating with outside air, said atmosphere communicating section including a plurality of chambers disposed between an inside of said ink containing section and the outside air, and a communicating port opening communicating each of said chambers with another of said chambers, said communicating port opening being smaller in size than each of said chambers communicating therewith;
• a recording head supplied with the ink from said ink container;
• scanning means for scanning said recording head relative to a recording medium;
• and
• conveying means for conveying said recording medium,
• wherein a portion of said atmosphere communicating section including an inner opening communicates with the inside of said ink containing section through the buffer chamber, and said portion projects into said buffer chamber.

An ink container having an ink containing section for containing ink, a buffer chamber communicating with said ink containing section and an atmosphere communicating section communicating with outside air, said atmosphere communicating section comprising:

• a first chamber having an inner opening projecting into the buffer chamber and communicating said first chamber with said ink containing section through the buffer chamber;
• a second chamber having an outer opening communicating said second chamber with the outside air;
• and
• a communicating port communicating said first chamber with said second chamber, said communicating port being smaller than said first and second chambers.

An ink jet apparatus comprising:

• an ink container having an ink containing section for containing ink, a buffer chamber communicating with said ink containing section and an atmosphere communicating section communicating with outside air, said atmosphere communicating section including a first chamber having an inner opening projecting into the buffer chamber and communicating said first chamber with said ink containing section through the buffer chamber, a second chamber having an outer opening communicating said second chamber with the outside air, and a communicating port communicating said first chamber with said second chamber, said communicating port being smaller than said first and second chambers;
• a recording head supplied with the ink from an inside of said ink container;
• scanning means for scanning said recording head relative to a recording medium;
• and
• conveying means for conveying said recording medium.