Abstract: A saw horse having folding legs which can be unfolded for use and folded for transportation and storage. The sawhorse legs can be unfolded by releasing a single latch and allowing the weight of the legs to unfold. To fold the legs into a storage position, either pair of legs can be rotated to the folded position and then the other legs can be rotated. Which side is initially chosen for closing is not important due to the leg mounting system.

Abstract: A compact and less costly development apparatus includes a first magnetic field generated by a driven magnetic development roller, and a second magnetic field generated by a magnetic skive for effectively removing spent developer material from the development roller. The magnetic skive which consists of a stationary non-magnetic shell and a rotatable multiple pole magnetic core, is rotatably driven by a magnetic coupling formed by such first and second magnetic fields.

Abstract: In electrographic apparatus a magnetic brush development station has a housing with a sump for holding a supply of developer material, and a magnetic brush that applies developer material from the sump to a latent image on a photoconductor. A rotatable transport roller feeds developer material from the sump toward the magnetic brush. A cylindrical tube is positioned around the roller and spaced from it. The tube has two elongate, spaced slots, and the tube is rotatable between first and second positions. A shut-off member engages the tube adjacent one of the slots. When the tube is in one of its positions the shut-off member is at one side of the one slot and developer material from the sump can pass through the one slot to the magnetic brush. When the tube is in its second position the shut-off member blocks the flow of developer material to the magnetic brush.