Multiplexed high-throughput image cytometry using encoded carriers

When the manual feeder and developer collecting container is attached to the copier body, there is a space which is formed by translating the developer collecting container in the attaching direction (the B-direction) of the developer collecting container, between the developer collecting container and the rear frame. The manual feeder is attached so that part of the manual feeder is disposed in this space. The attached developer collecting container, is arranged out side of a space which is the paths of the manual feeder for movement in the X-direction and in the Y-direction. The attached manual feeder is disposed outside the space which is the path of the developer collecting container. A lever as a shifting element of shifting a pickup feeding element between active and inactive positions resides in a space defined by translating the mid area across the full sheet width of the acceptable maximum size, in the direction of the sheet thickness. The space of the path of the pickup feeding element for movement between the active and inactive positions, is arranged so as to be in contact with the two planes normal to the direction of the sheet thickness, and the lever resides within this space. This lever is extended to a space defined by translating a boundary area of the full sheet width of the acceptable maximum size in the direction of the sheet thickness so that the extended portion is coupled to a pickup solenoid as the movement drive source for the pickup feeder.