Abstract: A developing device includes a developing member to carry developer stored by a developing frame, and a regulating blade having a support plate fixed to the developing frame, a plate-like member, and a regulating member. One end portion of the plate-like member is opposed to the developing member, and the other end portion is welded to the support plate. The regulating member is fixed to a plate-like member surface, and contacts the developing member to regulate a developer thickness on a developing surface. The regulating member is provided with a recessed portion recessed at a regulating member end portion. The regulating member end portion is lower than a regulating member central portion. A plate-like member region welded to the support plate is located at the plate-like member other end portion and overlaps the regulating member central portion and the regulating member end portion at which the recessed portion is provided.

Abstract: Provided is a corrugated paperboard box making machine which comprises: a cutting device for cutting one corrugated paperboard sheet into a plurality of small-size corrugated paperboard sheets along a direction perpendicular to a predetermined transport direction; a folder-gluer for bending and gluing each of the cut small-size corrugated paperboard sheets; a counter-ejector for stacking the glued small-size corrugated paperboard sheets to form a batch of the small-size corrugated paperboard sheets; and an inter-sheet spacing device for spacing the small-size corrugated paperboard sheets apart from each other, between the folder-gluer and the counter-ejector.