Ink cartridge device for inkjet printers

Abstract

Abstract PURPOSE:To prevent the generation of cracks in a rubber stop which causes the rubber to separate therefrom to invade into a hollow needle and to prevent the leakage of an ink outside the hollow needle, by a method wherein, in an ink cartridge flowing out the ink by putting the hollow needle provided with an ink inflow port into a rubber stop of an ink tank, the tip end of the hollow needle is shaped to have a spherical surface. CONSTITUTION:A hollow needle 35 has a tip end 35a with a spherical surface, an ink inflow port 36 provided by cutting the peripheral surface apart downwards from the tip end 35a into a circularly recessed shape, and an elliptic surface 35b corresponding to the peripheral surface portion from the tip end 35a to the ink infolw port 36. A recessed part 33a is provided on the lower surface of a rubber stop 33. Even if butting against the recessed part 33a with an offset from the center, the tip end 35a having a spherical surface slips along the slant portion of the recessed part 33a to be guided into the center thereof and, therefore, the offset is eliminated. The ink inflow port 36 is through the rubber stop 33 without scraping it because the peripheral surface upwards thereof is shaped to be the elliptic surface 35b.

Inventors

• 👤 Chuji Ishikawa
• 👤 忠二 石川
• 👤 Takashi Goino
• 👤 高志 五位野
• 👤 Rikio Kasahara
• 👤 力男 笠原

Bibliographic Details