| US 7,484,837 B2 | ||
| Liquid supply unit and inkjet recording apparatus with liquid supply unit | ||
| Yuji Koga, Nagoya (Japan); and Takatoshi Takemoto, Nagoya (Japan) | ||
| Assigned to Brother Kogyo Kabushiki Kaisha, Nagoya-shi, Aichi-ken (Japan) | ||
| Filed on Mar. 08, 2006, as Appl. No. 11/276,642. | ||
| Claims priority of application No. 2005-065476 (JP), filed on Mar. 09, 2005. | ||
| Prior Publication US 2006/0203047 A1, Sep. 14, 2006 | ||
| Int. Cl. B41J 2/175 (2006.01) | ||
| U.S. Cl. 347—85 | 8 Claims |
| 1. A liquid supply unit comprising:
a main tank that stores liquid;
a sub-tank provided in a jet device that ejects liquid droplets and connected to the main tank;
a pressure supply mechanism that applies predetermined pressure to the liquid reserved in the main tank and supplies the liquid
in the main tank to the sub-tank;
an air communication hole that is provided on an upper surface of the sub-tank and communicates inside of the sub-tank with
atmospheric air;
an air-permeable film provided so as to close the air communication hole, the air-permeable film being capable of passing
air but not capable of passing liquid; and
an excess pressure dispersion unit that disperses excess pressure from the liquid supply unit when the liquid inside of the
sub-tank becomes in contact with the air-permeable film and pressure inside the sub-tank becomes equal to or higher than predetermined
pressure.
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