Abstract: A second ink bottle is detachably attached to a bottle holder of an ink jet printer, and lower than a first ink bottle including an outflow port connected to an inflow port of the bottle holder when the ink bottle is attached to the bottle holder. The second ink bottle includes a main body having bottom and upper surfaces, in which ink is contained, a joint portion disposed on an upper portion of the main body and having an outflow port connectable to the inflow port, and a spacer detachably attached to a lower side of the main body. A height of the outflow port of the second ink bottle to a bottom surface of the spacer equals that of the outflow port of the ink bottle to a bottom surface of the first ink bottle, when the spacer is attached to the main body.

Abstract: A second ink bottle is detachably attached to a bottle holder of an ink jet printer, and lower than a first ink bottle including an outflow port connected to an inflow port of the bottle holder when the ink bottle is attached to the bottle holder. The second ink bottle includes a main body having bottom and upper surfaces, in which ink is contained, a joint portion disposed on an upper portion of the main body and having an outflow port connectable to the inflow port, and a spacer detachably attached to a lower side of the main body. A height of the outflow port of the second ink bottle to a bottom surface of the spacer equals that of the outflow port of the ink bottle to a bottom surface of the first ink bottle, when the spacer is attached to the main body.

Abstract: An apparatus develops an electrostatic latent image formed on an image carrier by attaching a developing agent containing toners, thereby converting the latent image into a toner image, transfers the toner image on a sheet, and fixes the toner image, thereby recording an image. The developing agent consists of a first magnetic toner containing less than 45 wt. % of a magnetic powder and having a comparatively low magnetism and low charge amount, and a second magnetic toner which has almost the same particle diameter as that of the first magnetic toner and charge characteristics of the same polarity as that of the first magnetic toner, contains 45 wt. % or more of a magnetic powder, and has a comparatively high magnetism and low charge amount. The first and second magnetic toners are mixed with a formulating proportion of 20 to 99 parts by weight and 1 to 80 parts by weight, respectively. The apparatus includes a convey mechanism for conveying the developing agent to the image carrier with a magnetism.