Abstract: An electrostatic copying apparatus in which the paper is fed from a cassette. The cassette has a casing for a stack of sheet-like copying papers of at least two different sizes, said casing being a box-like housing having an open top, a closure plate mounted detachably on the top surface of the housing and having at least one display window, and at least two restricting members mounted in spaced-apart relation in the longitudinal direction of the cassette casing so that they can pivot about the axial line of the cassette casing extending in the transverse direction of the cassette casing, each of the restricting members having a restricting portion for restricting the rear end of copying papers to be accommodated in the housing and a display portion having an indication of the size of copying papers, the display portion being positioned adjacent to the display window when the restricting portion is brought to its operative position beneath the closure plate.

Abstract: An electrostatic copying apparatus of the type in which an original to be copied is scanned and exposed to light by moving one of an original-support having a transparent plate for placing the original thereon and an optical system relative to the other, and paper feed rollers are rotated in regard to the movement of one of the original-supports and the optical system thereby supplying a copying paper, and a drive mechanism for reciprocating one of the original-supports and the optical system has a driven wheel and an idle wheel rotatably disposed in a spaced-apart relation to each other and a winding power transmission system wound about these wheels and drivingly connected to one of the original-supports and the optical system; wherein a synchronizing wheel is rotatably disposed adjacent to, and coaxially with, one of the driven wheel and the idle wheel of the drive mechanism, an engaging protrusion is fixed to the winding power transmission system, a plurality of engaging portions capable of cooperating wi

Abstract: An electrostatic copying apparatus of the type in which a rotary drum having a photosensative member on its surface is rotatably and detachably disposed at a predetermined location within a housing. The apparatus has a pair of inner side plates spaced apart from each other in the direction of the central axial line of rotation of said rotary drum, a guide and support member mounted at a predetermined location on the inside surface of each of said said plates, and formed in each said guide and support member, a bearing hole having a recess opened in a direction substantially perpendicular to said central axial line of rotation and at least one guide surface extending from said recess of said bearing hole in a direction substantially perpendicular to said central axial line of rotation.