Abstract: A convenience copier is provided with the capability for producing duplex, collated copies in page-sequential order, or an approximation thereof. The copier includes a processing section for establishing visible representations of the original, feeding sections for presenting the original sheets and copy sheets to the processing section on a one-original-sheet one-copy-sheet basis, and inverting means for presenting both faces of the original sheets to the processing section for copying and both faces of the copy sheets to the processing section for receiving the visible representations. The original sheets are circulated to the processing section in a manner suitable for producing collated copies and inverted with each circulation in a manner suitable for producing the copies in page sequential order.

Abstract: A magnetic brush developing apparatus has a partitioned storage hopper which receives developer material returned from a transport roller in a developer station. Partitions in the hopper direct the flow of such material in one direction. A single auger receives such material when it approaches one end of the hopper and moves it in the opposite direction to the other end of the hopper. Material is metered from the hopper to a development roller and then to the transport roller.

Abstract: A collating document feeder with a multiple-feed detector for use on a convenience copier. The feeder circulates the document sheets one-after-another for presentation to the copier once, and recirculates the sheets one-after-another for presentation to the copier again, thereby to present the sheets for copying in an order that facilitates collation of the final copies. The multiple-feed detector compares the number of presentations during circulation with the number of presentations during recirculation, to detect the occurrence of multiple feeds. The number of presentations can be determined, for example, by counting the number of exposures, or the number of times document sheets are fed.

Abstract: Diffuse illumination is provided in document copying apparatus for illuminating both the document and an area surrounding the outside edges of the document. The surrounding area reflects illumination similar to the original document to flashdown interframe sections of the photoconductor. Compensation for reduced reflectivity in certain portions of this surrounding area is accomplished by appropriately located specular reflecting surfaces.

Abstract: Web support for constraining the entering portion of a moving web against change in its spatial lateral position while remaining free to change its angular lateral position. The web support includes a web engaging surface which presents substantially no lateral resistance to the entering position of the moving web, and opposed edge guides mounted in a predetermined position on a fixed frame adjacent to the web engaging surface. The edge guides have opposed web engaging portions a fixed distance apart which distance corresponds substantially to the width of the moving web.