Abstract: A method for purifying an exhaust gas containing an excess amount of oxygen, to remove nitrogen oxides, carbon monoxide and hydrocarbons therefrom, by bringing a catalyst into contact with the exhaust gas, the catalyst comprising a zeolite ion-exchanged with (a) cobalt or (b) both cobalt and at least one metal selected from the group consisting of alkaline earth metals and rare earth metals, the zeolite being selected from the group consisting of ferrierite, ZSM-5, ZSM-11, ZSM-12 and ZSM-20, and having a silica-to-alumina molar ratio of from 15 to 1,000.

Abstract: A method for the catalytic purification of an oxygen-rich exhaust gas, wherein the catalyst comprises: a catalyst support, a zeolyte layer formed on the catalyst support and noble metals such as platinum, palladium and rhodium loaded on the catalyst. The catalyst for purifying the exhaust gas maintains a superior exhaust gas conversion performance over a long period of time.

Abstract: An electrophotographic apparatus capable of forming a high quality image by a contact type developing system using a photoconductive belt and a developing roller. The belt has a tubular configuration. A single friction roller is made of rubber and received in the tubular belt to drive it in a rotary motion. The friction roller has an outside diameter smaller than the inside diameter of the belt to provide the belt with a slack. The developing roller contacts the slack of the belt and, therefore, contacts the belt over a sufficient nip width.

Abstract: A catalyst for reducing nitrogen oxides from an exhaust gas containing the same in an oxygen rich atmosphere comprising (i) a zeolite having a molar ratio of SiO.sub.2 /Al.sub.2 O.sub.3 of at least 10, (ii) copper, and (iii) a rare earth ion, an alkaline earth metal and/or a valence variable metal.

Abstract: A recording apparatus which includes a photosensitive member and an image forming unit for forming a latent image on the photosensitive member. A developing unit develops this latent image by supplying toner to the photosensitive member so that a visible image corresponding to the latent image is formed on the photosensitive member. A transfer unit transfers the visible image from the photosensitive member to a recording sheet. A magazine unit having a first chamber for storing toner and a second chamber for storing scrap toner obtained by scraping residual toner from the photosensitive member is also provided. The magazine unit is detachably mounted to a housing of the recording apparatus. A supply mechanism supplies toner from the first chamber of the magazine unit to the developing unit.

Abstract: An image forming apparatus, which forms a predetermined image on each recording paper of a plurality of recording papers and ejects each recording paper therefrom through a feed path, includes a body and a first lid. The first lid is pivotably provided on the body so as to pivot from a closing position to an opening position, and the feed path is mostly exposed when the first lid is located at the opening position. The body includes photosensitive member, a latent image forming device, and a developing device, whereas the first lid includes merely a transfer device so that the first lid is light enough to be opened easily. In addition, a jammed paper can be removed easily from the feed path because the feed path is mostly exposed when the first lid is located at the opening position.

Abstract: An exhaust gas purifying catalyst of this invention is a catalyst for mainly removing nitrogen oxides contained in exhaust gases, comprising: crystalline copper silicate expressed by the following composition formula;M.sub.n+m (Cu.sub.n Al.sub.m Si.sub.96-n-m O.sub.192).16H.sub.2 O, where M denotes one of sodium (Na) and potassium (K), and n+m<27. An exhaust gas purifying process of this invention employs the above-mentioned crystalline copper silicate catalyst. The exhaust gas purifying catalyst and the exhaust gas purifying process employing the same purify the nitrogen oxides (NOx) by facilitating the reaction between hydrocarbons (HC) and nitrogen oxides (NOx) contained in the exhaust gases more preferentially than the reaction between hydrocarbons (HC) and oxygen (O.sub.2) contained therein, thereby purifying the nitrogen oxides (NOx) and hydrocarbons (HC) at high efficiency.

Abstract: A xerographic image recording apparatus includes a photosensitive body moved along a circuitous path, an electric discharging unit for eliminating electric charges from the photosensitive body, a precharging unit for charging the photosensitive body electrically, an image writing unit for writing an image on the photosensitive body, an image developing unit for coating the photosensitive body by the toner to form a toner image on the photosensitive body, a recording sheet feeding unit for feeding a recording sheet along a sheet path, an image transfer unit for transferring the toner image onto a recording sheet, a cleaning unit for removing the toner remaining on the photosensitive body after the transfer of image on the recording sheet is completed, a toner supply tank for supplying the toner to the image developing unit, and a toner recovery tank for collecting the toner removed by the cleaning unit from the photosensitive body, wherein the toner supply tank and the toner recovery tank are assembled into a

Abstract: The exhaust gases, such as of an internal combustion engine are contacted with a catalyst containing copper in the presence of hydrocarbons in an oxidizing atmosphere, whereby nitrogen oxides are reduced from the exhaust gases. Then, the exhaust gases are preferably contacted with an oxidizing catalyst. The former catalyst contains copper loaded on a porous support formed from alumina, silica, silica-alumina or zeolite or mixture thereof. The support is preferably a monolithic body having a first portion loaded with copper and a second portion loaded with a metal or metals defining the oxidizing catalyst.

Abstract: A catalyst for synthesizing hydrocarbons such as butane etc. by hydrogenation of carbon monoxide, which comprises cobalt and cerium oxide as catalytic components supported on a conventional porous material, or cobalt as a catalytic component and cerium oxide as a support thereof. This catalyst can produce C.sub.1 or more hydrocarbons and especially C.sub.5 or more hydrocarbons in good yields.

Abstract: A vibration absorption apparatus for a reciprocating object, in which the reciprocating object is reciprocated along a pair of parallel tracks and a vibration absorption member is moved in the direction opposite to the movement of said reciprocating object.

Abstract: A device for developing an electrostatic latent image carried on an image bearing member comprises a developing sleeve for transporting a magnetic developer as carried thereon through a developing station where the developer is applied to the image bearing member to develop the latent image thereon, a doctor blade for forming a developer film of predetermined thickness and charge, a plurality of magnets disposed inside of the developing sleeve to have the magnetic developer attracted to the developing sleeve, and a scraper for removing the developer remaining on the sleeve after development. In the preferred embodiment, the scraper is pivotally supported and at least comprised of a magnetic material thereby allowing it to be pressed against the sleeve due to magnetic attraction from the magnets inside of the sleeve.

Abstract: A device for developing an electrostatic latent image formed on an imaging surface using electrically insulating and magnetically attractable toner particles includes a developing sleeve and a doctor blade for forming a film of toner particles on the sleeve. In one form, the doctor blade has an end surface which is inclined at an angle in the range 15.degree..+-.15.degree. with respect to the tangential plane defined at the point of contact where the tip end of the doctor blade meets with the sleeve surface, and this angle converges in the direction of the sleeve's direction of movement.

Abstract: A development apparatus for developing latent electrostatic images to visible or transferable images of high quality for use in electrophotographic copying apparatus, electrostatic recording apparatus, facsimile apparatus or other recording apparatus, in which a development roller is in arc-contact with a latent-electrostatic-image-bearing flexible recording medium and is capable of supplying a sufficient amount of toner to the recording medium for development of the latent electrostatic images, without requiring any delicate adjustment of the gap between the development roller and the recording medium or of the gap between the development roller and a doctor blade for regulating the thickness of a toner layer on the development roller, and without increasing the rotary speed of the development roller to conventional speeds, and the doctor blade is also capable of performing charge injection to the toner with high efficiency, whereby images can be developed with high quality with a minimum deposition of toner

Abstract: A catalyst for reducing nitrogen oxides, carbon monoxide and hydrocarbons, the noxious components in exhaust gases from internal combustion engines, etc., which comprises: a carrier having a substructure of refractory material in the form of a honeycomb structure, etc., and a porous layer of a powder formed on the surface thereof selected from the group consisting of a powder of zirconium oxide and a mixed powder of zirconium oxide powder with at least one powder selected from the group consisting of alumina, alumina-magnesia spinel and cerium oxide; and a catalyst ingredient supported thereon consisting of cerium oxide and a metal selected from the group consisting of platinum, palladium and mixtures thereof.

Abstract: A magnetic brush development apparatus for developing latent electrostatic images formed on a flexible latent electrostatic image bearing member by a magnetic brush employing powder developer containing a magnetic material. The latent electrostatic image bearing member is positioned in contact with or in proximity to the magnetic brush formed on a sleeve for development. In a portion where the sleeve and the latent electrostatic image bearing member are positioned in proximity to each other, there are formed two spaces whose cross sections are wedge-shaped and development of the latent image is performed in the space on the upstream side with respect to the transport direction of the latent image bearing member and the unnecessary toner deposited on the latent image bearing member is cleaned in the other space on the downstream side.

Abstract: A self-heating type ignition plug according to the present invention includes a base portion having a fixing portion formed on an outer wall thereof and a terminal insulately provided therein and connected to an electrical source; an ignition means, integrally connected to the base portion, having an ignition surface formed on a wall surface thereof and composed of a catalyst comprising a transition material, thereby to come in contact with the fuel; and a heating means having a resistive exothermic element connected to the terminal of the base portion, the resistive exothermic element being provided adjacent to the ignition surface within the ignition means, whereby the fuel may be ignited and burned as a whole by the ignition surface of the catalyst which is maintained to a preset temperature due to the oxidation reaction of the catalyst and the fuel being in contact therewith after the heating means is deenergized.

Abstract: A catalyst for reducing nitrogen oxides, carbon monoxide and hydrocarbons, the noxious components in exhaust gases from internal combustion engines, etc., comprising: a porous carrier of ceramic selected from the group consisting of alumina and alumina-magnesia spinel; and a catalyst ingredient supported thereon consisting essentially of zirconium oxide, cerium oxide and a metal selected from the group consisting of platinum, palladium and mixtures thereof.

Abstract: A xerographic image recording apparatus includes a photosensitive body moved along a circuitous path, an electric discharging unit for eliminating electric charges from the photosensitive body, a precharging unit for charging the photosensitive body electrically, an image writing unit for writing an image on the photosensitive body, an image developing unit for coating the photosensitive body by the toner to form a toner image on the photosensitive body; a recording sheet feeding unit for feeding a recording sheet along a sheet path, an image transfer unit for transferring the toner image onto a recording sheet, a cleaning unit for removing the toner remaining on the photosensitive body after the transfer of image on the recording sheet is completed, a toner supply tank for supplying the toner to the image developing unit, and a toner recovery tank for collecting the toner removed by the cleaning unit from the photosensitive body, wherein the toner supply tank and the toner recovery tank are assembled into a