Abstract: An image forming apparatus performs primary transfer of single-color toner image onto an intermediate transfer belt and performs secondary transfer of the toner image onto a sheet, and includes: single image forming unit forming the single-color toner image; single toner supply bottle containing replenishment toner; and first and second support members supporting the belt. The image forming unit is closer to the first member than the second member in a belt rotation direction. The bottle includes: single bottle body; and supply unit near one end of the body in the rotation direction. The other end is (i) closer to the second member than the one end is in the rotation direction and (ii) distant from the image forming unit in a support member direction from the first member toward the second member by one to three times a length of the image forming unit in the support member direction.

Abstract: An anti-slip device for preventing an installed image forming device from slipping on an installation surface. The anti-slip device includes an operation portion that can be moved by a user, a movable portion, and an anti-slip member. The movable portion has a bottom surface and moves in conjunction with movement of the operation portion to move from a first position to a second position above the first position. The anti-slip member is provided on the bottom surface of the movable portion and comes into contact with the installation surface when the movable portion is in the first position and separates from the installation surface when the movable portion is raised from the first position to the second position.

Abstract: An image forming apparatus that performs primary transfer of single-color toner image onto an intermediate transfer belt and performs secondary transfer of the toner image onto a sheet, and includes: single image forming unit forming the single-color toner image; single toner supply bottle containing replenishment toner; and first and second support members supporting the belt. The image forming unit is closer to the first member than the second member in a belt rotation direction. The bottle includes: single bottle body; and supply unit near one end of the body in the rotation direction. The other end is (i) closer to the second member than the one end is in the rotation direction and (ii) distant from the image forming unit in a support member direction from the first member toward the second member by one to three times a length of the image forming unit in the support member direction.

Abstract: Windows 491, 493 each having LED 481, 482 near the window and a window 492 having no LED are disposed alternately and in a row. Pulse width of voltage pulse applied on LEDs 481, 482 is controlled into the time width corresponding to the brightness. Thereby, the ON/OFF conditions and the brightness of the LEDs 481, 482 are controlled by the control section 50. Peak of brightness may be changed sequentially at predetermined time intervals from the LED 481 at one end to the LED 482 at the other end. Light leaked from the three windows 491, 492, 493 look like a flow from one end to the other end. Not only the numbers of parts can be decreased but also the consumed current can be reduced.