Abstract: There are provided a paper conveying apparatus, a multifeed detection method and a computer-readable, non-transitory medium which can suppress erroneous detection of the occurrence of a multifeed. The paper conveying apparatus includes an ultrasonic detector for outputting an ultrasonic signal, a multifeed detector for determining whether a multifeed of papers has occurred based on the ultrasonic signal, a sound signal generator for generating a sound signal, and a control module for performing an abnormal processing when the multifeed detector determines that a multifeed has occurred and the sound signal generator does not output a predetermined sound signal, and determining that a multifeed has not occurred and not performing the abnormal processing when the multifeed detector determines that a multifeed has occurred and the sound signal generator outputs the predetermined sound signal.

Abstract: There are provided a paper conveying apparatus which can effectively detect a sound which is generated when a jam occurs for various types of jams. The paper conveying apparatus includes a side guide, arranged to be movable in a direction which is perpendicular to a conveyance direction of a paper placed on a paper tray, for restricting a width direction of the paper, a sound signal generator, provided at the side guide so that a sound detector moves in accordance with movement of the side guide, for generating a sound signal corresponding to a sound generated by the paper during conveyance of the paper, and a sound jam detector for determining whether a jam has occurred based on the sound signal.

Abstract: There are provided a paper conveying apparatus, a jam detection method and a computer-readable, non-transitory medium that can suppress erroneous detection of a jam by sound due to the sound which a paper which has a wrinkle generates. The paper conveying apparatus includes a separator, a sound signal generator, provided with a sound detector provided at a downstream side of the separator, for generating a sound signal in accordance with the sound generated by a paper during conveyance, a sound jam detector for determining whether a jam has occurred based on the sound signal, and a wrinkle detector, provided at a downstream side of the separator, for detecting optically a wrinkle of a paper, wherein the sound jam detector changes the method of detection of the jam when the wrinkle detector detects a wrinkle of a paper.

Abstract: There are provided a paper conveying apparatus, a jam detection method and a computer-readable, non-transitory medium which can determine whether a jam has occurred based on the sound which is generated by a paper during conveyance at a low cost. The paper conveying apparatus includes an ultrasonic detector, provided near a conveyance path of a paper, for detecting an ultrasonic wave which passes through paper and outputting an ultrasonic signal, a multifeed detector for determining whether multifeed of papers has occurred based on a component of a first frequency band in the ultrasonic signal, and a sound jam detector for determining whether a jam has occurred based on a component of a second frequency band lower than the first frequency band in the ultrasonic signal.

Abstract: A feeding device includes a tray for stacking sheet-like conveyance-target media, a first pressing unit, and a second pressing unit. The first and second pressing units face and apply a first and second pressing force, respectively, on a circumferential surface of a pick roller so that a first contact area and a second contact area overlap each other. The first pressing unit includes a first pressing unit separation roller, and the first contact area is defined wherein the first pressing unit and the pick roller make contact with each other. The second contact area is defined wherein the second pressing unit and the pick roller make contact with each other such that the first contact area and the second contact appear to partly overlap each other when viewed from an axial direction of the pick roller.

Abstract: A feeding device includes a tray for stacking sheet-like conveyance-target media, a first pressing unit, and a second pressing unit. The first and second pressing units face and apply a first and second pressing force, respectively, on a circumferential surface of a pick roller so that a first contact area and a second contact area overlap each other. The first pressing unit includes a first pressing unit separation roller, and the first contact area is defined wherein the first pressing unit and the pick roller make contact with each other. The second contact area is defined wherein the second pressing unit and the pick roller make contact with each other such that the first contact area and the second contact appear to partly overlap each other when viewed from an axial direction of the pick roller.

Abstract: In a feeding device, a first friction pad and a second friction pad are disposed on a circumferential surface of a pick roller so that a first contact area and a second contact area overlap each other. Thus, to a conveyance-target medium, which is either one of a conveyed medium and a separation-target medium, pressing forces are successively applied by the first friction pad or the second friction pad over the first contact area to the second contact area. Therefore, the conveyance-target medium, which is either one of the conveyed medium and the separation-target medium, successively receives a separation force in a total contact area wider than an area when receiving a separation force only in either one of the first contact area and the second contact area. With this, the capability of separating the conveyed medium and the separation-target medium can be increased.

Abstract: In a feeding device, a first friction pad and a second friction pad are disposed on a circumferential surface of a pick roller so that a first contact area and a second contact area overlap each other. Thus, to a conveyance-target medium, which is either one of a conveyed medium and a separation-target medium, pressing forces are successively applied by the first friction pad or the second friction pad over the first contact area to the second contact area. Therefore, the conveyance-target medium, which is either one of the conveyed medium and the separation-target medium, successively receives a separation force in a total contact area wider than an area when receiving a separation force only in either one of the first contact area and the second contact area. With this, the capability of separating the conveyed medium and the separation-target medium can be increased.

Abstract: An automatic paper feeder of a document input device includes a pick roller 20, separator pads 68 that come into contact with the pick roller 20, a first pair of pick springs 58, and a second pick spring 60. The first pick springs 58 are disposed on the upstream side of the second pick spring 60 in the direction of conveying the paper. The first pick springs 58 are disposed on the regions on both outer sides of the width of the separator pads 68 in the axial direction of the roller, and the second pick spring 60 is disposed at a central position in the width of the separator pad 68. The first and second pick springs 58 and 60 are integrally formed as a spring unit using a single metal plate, and a force of contact of the first pick springs 58 upon the pick roller 20 on the upstream side is smaller than a force of contact of the second pick spring 60 upon the pick roller 20 on the downstream side. The separator pad 68 is formed by branching a web 70 of a rubber sheet into fork-like pad units.

Abstract: An automatic paper feeder of a document input device includes a pick roller 20, separator pads 68 that come into contact with the pick roller 20, a first pair of pick springs 58, and a second pick spring 60. The first pick springs 58 are disposed on the upstream side of the second pick spring 60 in the direction of conveying the paper. The first pick springs 58 are disposed on the regions on both outer sides of the width of the separator pads 68 in the axial direction of the roller, and the second pick spring 60 is disposed at a central position in the width of the separator pad 68. The first and second pick springs 58 and 60 are integrally formed as a spring unit using a single metal plate, and a force of contact of the first pick springs 58 upon the pick roller 20 on the upstream side is smaller than a force of contact of the second pick spring 60 upon the pick roller 20 on the downstream side. The separator pad 68 is formed by branching a web 70 of a rubber sheet into fork-like pad units.

Abstract: An image apparatus is provided with a bottom take-out type automatic paper feeding mechanism. Documents are sequentially taken out from a lowermost document by coaction of a paper feeding roller and a document separation pad which is elastically pressed against the paper feeding roller. A hopper is provided on which the documents are placed by stacking. Projections are provided on a document placement surface of the hopper or a paper feeding passage. The projections prevent the documents from being adhered to the hopper which has been electrostatically charged.

Abstract: An automatic paper feeder of a document input device includes a pick roller 20, separator pads 68 that come into contact with the pick roller 20, a first pair of pick springs 58, and a second pick spring 60. The first pick springs 58 are disposed on the upstream side of the second pick spring 60 in the direction of conveying the paper. The first pick springs 58 are disposed on the regions on both outer sides of the width of the separator pads 68 in the axial direction of the roller, and the second pick spring 60 is disposed at a central position in the width of the separator pad 68. The first and second pick springs 58 and 60 are integrally formed as a spring unit using a single metal plate, and a force of contact of the first pick springs 58 upon the pick roller 20 on the upstream side is smaller than a force of contact of the second pick spring 60 upon the pick roller 20 on the downstream side. The separator pad 68 is formed by branching a web 70 of a rubber sheet into fork-like pad units.

Abstract: A molding resin composition comprising 99.9 to 50% by weight of polyimide represented by the formula: ##STR1## and 0.1 to 50% by weight of polyether ketone resin and/or polyester resin, and more particularly comprising the polyester resin capable of forming an anisotropical molten phase at a temperature of 420.degree. C. or less, and a polyimide-based molding resin composition which comprises the said resins and other additives such as phenolic resin, fluororesin, graphite, carbon fibers, aromatic polyamide fibers, potassium titanate fibers and a crystallization accelerator, and is excellent in thermal resistance, chemical resistance, mechanical strength and processability.

Abstract: An image reading apparatus is provided with white reference sheets. The image reading image apparatus is movable between a first reading position at which an optical reading unit reads image information on a document supplied by an automatic paper feeding mechanism and a second reading position. The image reading apparatus regulates an absolute white level with respect to a light source.

Abstract: An image reading apparatus has a reading unit including a light source lamp mounted on a unit frame arranged in a document reading portion. The image reading apparatus comprised as a lamp frame supporting the light source lamp. The lamp frame has a pin. Projections are pivotally arranged on a back side surface of the lamp frame at an interval in a longitudinal direction of the light source lamp. An upper end of the projections has a grip for grasping. One of the projections has an elongated hole for receiving the pin. The pin regulates an pivoting angle of the projection. Slit holes, in which the projections are fitted, are formed in the unit frame.

Abstract: A molding resin composition comprising 99.9 to 50% by weight of polyimide represented by the formula: ##STR1## and 0.1 to 50% by weight of polyether ketone resin and/or polyester resin, and more particularly comprising the polyester resin capable of forming an anisotropical molten phase at a temperature of 420.degree. C. or less, and a polyimide-based molding resin composition which comprises the said resins and other additives such as phenolic resin, fluororesin, graphite, carbon fibers, aromatic polyamide fibers, potassium titanate fibers and a crystallization accelerator, and is excellent in thermal resistance, chemical resistance, mechanical strength and processability.

Abstract: A paper feed roller (5) is divided into a first roller (5a) and a second roller (5b); a slit (58) through which about 10 to 20 sheets of documents can pass is formed between the first roller and a gate plate (57) opposite to this; and the paper fed out therefrom is fed out to a space between the second roller (5b) and a separation pad (7) in contact with this.Also, there is adopted a construction in which the pressing force of a paper conveyance spring is transformed by a slide cam sliding in a direction parallel to the paper feed roller; and the paper width detection sensor is assembled by a fitting construction.

Abstract: A paper feed roller (5) is divided into a first roller (5a) and a second roller (5b); a slit (58) through which about 10 to 20 sheets of documents can pass is formed between the first roller and a gate plate (57) opposite to this; and the paper fed out therefrom is fed out to a space between the second roller (5b) and a separation pad (7) in contact with this.Also, there is adopted a construction in which the pressing force of a paper conveyance spring is transformed by a slide cam sliding in a direction parallel to the paper feed roller; and the paper width detection sensor is assembled by a fitting construction.

Abstract: A paper feed roller (5) is divided into a first roller (5a) and a second roller (5b); a slit (58) through which about 10 to 20 sheets of documents can pass is formed between the first roller and a gate plate (57) opposite to this; and the paper fed out therefrom is fed out to a space between the second roller (5b) and a separation pad (7) in contact with this.Also, there is adopted a construction in which the pressing force of a paper conveyance spring is transformed by a slide cam sliding in a direction parallel to the paper feed roller; and the paper width detection sensor is assembled by a fitting construction.

Abstract: A paper feed roller (5) is divided into a first roller (5a) and a second roller (5b); a slit (58) through which about 10 to 20 sheets of documents can pass is formed between the first roller and a gate plate (57) opposite to this; and the paper fed out therefrom is fed out to a space between the second roller (5b) and a separation pad (7) in contact with this.Also, there is adopted a construction in which the pressing force of a paper conveyance spring is transformed by a slide cam sliding in a direction parallel to the paper feed roller; and the paper width detection sensor is assembled by a fitting construction.