摘要:
The present invention relates to a desk-top type color electro-photographic apparatus which is easy in use, small in size and light in weight, wherein maintenance such as changing its photosensitive member can be performed by a user and color adjustment is performed with high accuracy of less than 100 .mu.m. Developing units for four colors are placed in a rank, a single endless-belt-shaped photosensitive member being placed below them to form an approximately oval shape, the photosensitive member being touched with a transfer member on its major axis side to transfer each color of images. In addition to this, the photosensitive member is employed a cartridge type for easiness of user's maintenance and constructed such that highly accurate positioning between the body of apparatus and the cartridge can be performed. Effect of the eccentricity of pulleys is decreased by means of making the pulleys wrapped with the photosensitive member have the identical diameter and making the diameter of the transfer member integer times as large as that of the pulley.
摘要:
An intermediate transcription drum is supported so as to be driven in contacting relationship with a photosensitive belt. The rotating speed of the photosensitive belt driving motor is controlled by a control unit such that one rotation cycle of the intermediate transcription drum becomes a given cycle. An adjustment of the speed control data for the photosensitive belt driving motor is performed in the interval between electrostatic latent image forming. Thereby, a speed difference between the photosensitive belt and the intermediate transcription drum does not occur, and a plurality of the toner images can be transferred and accurately superposed onto the outer surface of the intermediate transcription drum.
摘要:
An image forming and recording apparatus, having a fixing apparatus for fixing unfixed toner image on a recording medium, wherein the fixing apparatus includes a fixing roller integrating a heater therein, an endless belt wound around the fixing roller, and three pressure members for pressing the endless belt onto the fixing roller. A pressure member located nearest to a side of entry of paper among the three pressure members is made up with a non-rotary type pressure member, and other two pressure members are made up with either one of a rotary type pressure member and the non-rotary type pressure member.
摘要:
Registration controlling methods are provided for a color electrophotographic apparatus capable of forming an image without color registration errors and uneven color. This is accomplished by preventing a photosensitive medium from being undesirably moved in the direction perpendicular to the transportation direction caused by an electrostatic attractive force between the photosensitive medium and an intermediate transfer device, even if there is a twist between the fixed axis of the member supporting the photosensitive medium and the axis of the member supporting the intermediate transfer device. With these methods, a fur brush cleaner made of a conductive brush is detached from the intermediate transfer device during the time period after the start of driving the photosensitive medium and until the front edge of the photosensitive medium reaches the intermediate transfer device. A small amount of toner therefore always exists between the intermediate transfer device and the photosensitive medium during the transportation of the photosensitive medium, thereby reducing the electrostatic attractive force between the intermediate transfer device and the photosensitive medium and preventing the photosensitive medium from being undesirably moved in the direction perpendicular to the transportation direction. Also during this time period, the photosensitive medium is irradiated by a fade lamp to reduce electric charges on the photosensitive medium.
摘要:
A copy sheet, to which a developed image has been transferred by a transfer device, continues to be attracted to a copy sheet carrying surface of an insulating film and delivered toward a fusing roller pair. A force in a direction for pressing the copy sheet toward the insulating film is exerted, by an attraction strengthening device, on the copy sheet which is passing the vicinity of a downstream end of the copy sheet carrying surface after the transfer operation. This force strengthens a force for retaining the copy sheet on the copy sheet carrying surface of the insulating film, so as to hinder a portion of the copy sheet from being bent upwardly to the side of a photoreceptor and separated from the insulating film. Thus, separation of the copy sheet from the insulating film can be prevented from extending as far as a transfer position.
摘要:
The present invention provides an electrophotographic copying apparatus in which a copy sheet is attracted to and delivered by a transfer belt to perform a transfer operation, wherein a sag of the leading end of the copy sheet is removed to prevent the copy sheet from being attracted to a photoreceptor, venting method of preventing attraction of the copy sheet. Stacked copy sheets are individually separately supplied, with each of the copy sheets being electrostatically attracted to and delivered by the transfer belt. The copy sheet is held between the photoreceptor and the transfer belt and is in contact with them. The photoreceptor carries an electrostatic latent image corresponding to an image information and a toner electrostatically attracted to the electrostatic latent image. The toner image on the photoreceptor is transferred to the copy sheet. The leading end of the copy sheet delivered to a transfer section defined by the photoreceptor, the transfer belt and a transfer corrotron is slightly bent toward the photoreceptor.
摘要:
A method for xerographic printing, comprises the steps of, holding a part of a work sheet at a position other than a leading end of the work sheet, before the leading end contacts with a toner image forming surface on which a toner image is formed by an electrostatic, charge of toner, holding both surfaces of the leading end of the work sheet and applying a frictional force to at least one of the surfaces of the leading end so that a tension is applied to the work sheet between the held part and the leading end, before the leading end contacts with the toner image forming surface, and making the work sheet contact with the toner image forming surface, and transferring the toner image from the toner image forming surface to the surface of the work sheet by generating an electric field for attracting the charged toner to the surface of the work sheet.
摘要:
A liquid crystal display device using a horizontal electric field mode, in which contrast ratio is improved, is provided. A first polarizing plate having a polarization axis along a first direction, a second polarizing plate having a polarization axis along a second direction orthogonal to the first direction, a plurality of first structure bodies provided over a first substrate, a plurality of second structure bodies provided over the first substrate, a first electrode layer covering top surfaces and side surfaces of the plurality of first structure bodies, and a second electrode layer covering top surfaces and side surfaces of the plurality of second structure bodies are provided. The side surfaces of the first structure bodies and the side surfaces of the second structure bodies are parallel to the first direction or the second direction. Thus, a liquid crystal display device in which contrast ratio is improved can be provided.
摘要:
A purge gas concentration estimation apparatus has a canister having a casing that is filled with adsorbent which adsorbs and desorbs evaporated fuel and a heat capacity detection device that is disposed in the casing. The heat capacity detection device detects a heat capacity of an inside of the casing. An adsorption amount of the evaporated fuel that is adsorbed in the casing is detected from the heat capacity of the inside of the casing detected by the heat capacity detection device, and a purge gas concentration is estimated from the detected adsorption amount of the evaporated fuel.
摘要:
A fuel vapor storage canister for an automotive vehicle, includes a casing formed thereinside with charge, purge and drain ports connected to a gas passage. First, second, third and fourth adsorption layers are disposed in the gas passage and arranged in order of first, second, third and forth adsorption layers from side of the charge port along a longitudinal direction of the gas passage. Each adsorption layer includes a fuel vapor adsorbent. Additionally, a first space section is formed between the first and second adsorption layers. A second space section is formed between the second and third adsorption sections. A third space section is formed between the third and fourth adsorption sections. Each space section has a width in the longitudinal direction of the gas passage.