Abstract: A copying apparatus includes an automatic document feeding unit for sequentially circulating and feeding documents to be copied, an image forming unit for forming images on the documents on both surfaces of each copying paper sheet by an electrophotographic process, a punching/binding unit for punching or binding a plurality of copying paper sheets subjected to image formation, an image shift unit for controlling a paper feed timing of a copying paper sheet with respect to a formation position of a document image, and a control unit for causing the image shift unit to perform image shift when even-numbered pages of documents are copied.

Abstract: An electrophotographic copying apparatus is equipped with an automatic document feeder and an optical system for exposing a document by scanning. The automatic document feeder feeds and places the first original document on a platen glass table where the first document is exposed to light. The optical system exposes the first document by scanning light subsequent to a preliminary movement of the optical system. The automatic document feeder replaces the first document with the second original document, while delivering out the first document, wherein replacing the first document with the second one during the period while the optical system is carrying out the preliminary movement after exposure of the first document.

Abstract: An electrophotographic copying apparatus has increased speed in recording sheet conveyance where the conveying path from the sheet feed cassette to the photosensitive member is relatively long. The sheet conveyance apparatus is constructed to equalize the line speed of the photosensitive member, the feed speed of the recording sheet and the conveying speed of the recording sheet. A plurality of sheets serially fed out from a sheet tray are concurrently transported along the sheet path. A sheet is fed out from the sheet tray in response to a timing reference signal generated in response to the scanning operation for a previously fed out sheet.

Abstract: The present invention is directed to a method for dewaxing hydrocarbon oil which is characterized by bringing the hydrocarbon oil into contact with a catalyst which is prepared by mixing specific crystalline aluminosilicate, defined in claim 1, having an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio between 12 and less than 70 with at least one solid fluorine compound selected from aluminum fluoride, ammonium fluoride, zinc fluoride, cadmium fluoride, manganese fluoride, chromium fluoride, tin fluoride, copper fluoride and silver fluoride; molding the resulting mixture into an optional shape; and calcining the molded mixture at a temperature of 100.degree. to 700.degree. C. for a time of 0.5 hour or more.

Abstract: A document feeding apparatus wherein documents are fed one by one from a document stacker by a first document feeding device and a second document feeding device which is provided in the midway of a path from the first document feeding device to a processing unit, and the movement of the document is stopped temporarily by a document stopping device before the leading end of the document fed from the second document feeding device reaches a synchronous sensor provided in the midway of a path from the second document feeding device to the processing unit. The first document feeding device consists of a feeding belt connected to a drive source through an electromagnetic clutch, and a separating roller which is in sliding contact with an upper surface of the feeding belt in a non-rotary state. The second document feeding device consists of a drive roller connected to a drive source through an electromagnetic clutch, and a driven roller which is press contact with the drive roller.

Abstract: Hydrocracking catalysts are disclosed which comprise specified amounts of selected inorganic oxides and specified amounts of selected metal components carried thereon. The carrier is essentially derived from solid-phase modification with specified amounts of a selected class of fluorine compounds. Mineral oils are selectively processable with high catalytic activity and at maximum yield.

Abstract: The present invention provides a method for removing an iron content in a petroleum series mineral oil therefrom which comprises treating a petroleum series mineral oil fraction containing 5 ppm or more of the iron content by the use of a high gradient magnetic separator under conditions of the strength of a magnetic field being from 500 to 25,000 gauss, a temperature being from room temperature to 400.degree. C., and a linear velocity being 0.1 to 50 cm/second.

Abstract: Provided is a process for producing gasoline having a high octane number or aromatic hydrocarbons by contacting a feed stock containing at least one aliphatic hydrocarbon having 1 to 12 carbon atoms with a catalyst at an elevated temperature said catalyst comprising a zeolite and a fluorine compound, and optionally Group Ib, IIb, IIIa, VI, VIIb or VIII metal in the Periodic Table.

Abstract: A process for catalytic reaction of heavy oils and a particulate solid medium, which comprises withdrawing a part or the whole of the used medium from the reactor, separating the withdrawn particles into the particles which have been rendered magnetic by the deposition thereon of nickel, vanadium, iron and copper originally contained in the heavy oils, and non-magnetic particles, using a high gradient magnetic separator which is so designed that a ferromagnetic matrix is placed in a uniform high magnetic field, and returning the non-magnetic particles of the medium into the reactor for re-use.

Abstract: A process for fluid catalytic cracking of a starting oil selected from the group consisting of a distillation residual oil, a solvent deasphalted oil derived therefrom and a hydrodesulfurized oil derived therefrom, which comprises withdrawing a part of catalyst particles circulating through a fluid catalytic cracking unit, sending the withdrawn catalyst particles by means of a carrier fluid selected from the group consisting of air, nitrogen, steam and the mixtures thereof at a rate of 0.01 to 100 meters/second in a particle concentration of 0.

Abstract: Process for isomerizing saturated hydrocarbons in the presence of a catalyst composition comprised of platinum or palladium on a fluorine-containing mordenite-type aluminosilicate, the fluorine having been introduced to the composition by halogenation with a fluorine-containing hydrocarbon halide.