Abstract: The present invention provides a vibration generator capable of accurately adapting to fine vibration. The vibration generator has a stationary permanent magnet, a yoke for the permanent magnet, a coil fixed to the yoke, four springs provided to the yoke, and a movable piece supported with the yoke through the four springs. The end portions of the movable piece are arranged between the respective two pairs of the projections with first gaps. The central portion of the movable piece is arranged in the through-hole with the second gaps, the second gaps having a size to allow oscillation, which is regulated by the first gaps, of the central portion of the movable piece.

Abstract: The present invention provides an image engraving apparatus capable of precisely driving a stylus to improve accuracy of image engraving. The image engraving apparatus has a vibration actuator fixed to a floating base and having an output portion configured to output vibration generated by deformation of piezoelectric elements, a stylus supported with a stylus holder to be vibrated and engrave an image on a medium to be engraved, a supporting spring supporting the stylus holder, and a retainer positionally adjustably supported to the floating base to come into contact with the medium.

Abstract: The present invention provides a vibration generator capable of accurately adapting to fine vibration. The vibration generator has a stationary permanent magnet, a yoke for the permanent magnet, a coil fixed to the yoke, four springs provided to the yoke, and a movable piece supported with the yoke through the four springs. The end portions of the movable piece are arranged between the respective two pairs of the projections with first gaps. The central portion of the movable piece is arranged in the through-hole with the second gaps, the second gaps having a size to allow oscillation, which is regulated by the first gaps, of the central portion of the movable piece.

Abstract: Provided are an automatic continuous image engraving device capable of decreasing in size of an installing space of the device. The device comprises an unengraved medium accommodating part, an engraved medium accommodating part, a medium dispenser, a medium positioning and conveying part, and an image engraving part, wherein the medium dispenser releases the unengraved card-shaped engraving medium to cause the same to be succeeded at the succeeding position, the medium positioning and conveying part returns the engraved card-shaped engraving medium after image engraving from the engraving position to the succeeding position, and the medium dispenser adsorbs the engraved card-shaped engraving medium at the succeeding position, moves the same upward, travels above the engraved medium accommodating part, and releases the engraved card-shaped engraving medium to be accommodated.

Abstract: Provided are an automatic continuous image engraving device capable of decreasing in size of an installing space of the device. The device comprises an unengraved medium accommodating part, an engraved medium accommodating part, a medium dispenser, a medium positioning and conveying part, and an image engraving part, wherein the medium dispenser releases the unengraved card-shaped engraving medium to cause the same to be succeeded at the succeeding position, the medium positioning and conveying part returns the engraved card-shaped engraving medium after image engraving from the engraving position to the succeeding position, and the medium dispenser adsorbs the engraved card-shaped engraving medium at the succeeding position, moves the same upward, travels above the engraved medium accommodating part, and releases the engraved card-shaped engraving medium to be accommodated.

Abstract: An image card has an image formed on a card base by engraving striped grooves having different angles according to the degree of shading of the image by the engraving.

Abstract: In an image card where an image is formed on a thin plate made of special synthetic paper or plastic by engraving by sweeping the plate with the engraving needle through relative movement of an engraving needle and a plate, it is impossible to form a hidden image which can be viewed when a viewpoint is changed or form an image formed by watermark engraving and the hidden image within the same plane. A hidden image is formed on an image card by engraving while angles of stripes of striped patterns are changed in response to shading of an image. Further, an image engraving device is provided with a rotary driving unit, and engraving is performed in a state that an extending direction of striped grooves of the hidden image and a forming direction of the engraving are made equal, so that a wall face of a groove is always formed by the same side face of an engraving needle and undulation does not occur on the wall face of the groove. Similarly, a shape of a bottom face of the groove is made even.

Abstract: The present invention provides an image engraving device for engraving a special composite paper or a thin plastic plate by moving an engraving needle and a target plate to be engraved relative to each other such that the engraving needle scans the target plate, the image engraving device operating only if a license code is input and is certified correct. The image engraving device has a license code input part for inputting a license code, a license code certifying part certifying whether the input license code is correct or not, and a controller controlling to allow the image engraving device to operate only if the license code is certified correct. With this configuration, the image engraving device solves the problem. In order to secure the certification of the license code, an engraving needle driver and a target plate driver are provided certifying parts, respectively. The operation of the certifying parts is hard-coded to prevent the image engraving device from fraudulently certifying.

Abstract: In an image card where an image is formed on a thin plate made of special synthetic paper or plastic by engraving by sweeping the plate with the engraving needle through relative movement of an engraving needle and a plate, it is impossible to form a hidden image which can be viewed when a viewpoint is changed or form an image formed by watermark engraving and the hidden image within the same plane. A hidden image is formed on an image card by engraving while angles of stripes of striped patterns are changed in response to shading of an image. Further, an image engraving device is provided with a rotary driving unit, and engraving is performed in a state that an extending direction of striped grooves of the hidden image and a forming direction of the engraving are made equal, so that a wall face of a groove is always formed by the same side face of an engraving needle and undulation does not occur on the wall face of the groove. Similarly, a shape of a bottom face of the groove is made even.

Abstract: A security sheet having with high anti-forgery/falsification property has an engraving layer including a sheet surface provided with an engraved identification image and a visible image non-engraved and being identical in details to the identification image so as to allow observation by comparison. For example, when a policeman questions a suspicious person at night to ask that person to present an identification card, the policeman checks the engraved identification image through tactile sense and visual sense. At the same time, the policeman checks the engraved identification image and the non-engraved visible image identical in details thereto through observation by comparison between both images by visual sense and through face-to-face observation of the person. With this, identity of the person can be authenticated by making use of tactile sense and visual sense complementarily.

Abstract: A personal authentication card having a high visual checking security and a method of manufacturing the same which comprises a set of an upper and a lower transparent card support layers, an IC chip and an antenna being located on top surface of said lower transparent card support layer to be sandwiched between said upper and lower transparent card support layers, a white gradating printing layer put on the upper transparent card support layer, said white gradating ordinary printing layer having a photograph image printing portion printed by a sublime heat transcript printing at a position of the ordinary printing layer which does not interfere with the IC chip and the antenna, an ordinary printing layer and the same area as the lower transparent card support layer, said ordinary printing layer having a white mat portion to locate at the photograph image printing portion, a black printing layer being provided integrally on the ordinary printing layer, a woven pattern hologram gradating layer provided integral

Abstract: An apparatus can be used for engraving images on a passport, credit card, identification card, or the like, and has an adaptor for use in the apparatus. The apparatus includes a personal computer, a controller, a vibration-preventing unit, an X axis pulse motor driver, a Y axis pulse motor driver, an X axis pulse motor, a tilt motor driver, a Z axis head motor having a minute ? Y axis driver, a stylus and a vacuum pump. Photographs of faces, addresses, names, autographs, the images for engraving information identifying one's identity, the images from a digital camera, scanner or other information taken from a computer through a network can be automatically and correctly engraved on identification cards such as passports, drivers' licenses, employee certificates or credit cards.

Abstract: An apparatus for engraving images on a passport, credit card, identification card, or the like, and its adaptor for use in the apparatus, the apparatus comprising a personal computer, a controller, a vibration-preventing unit, an X axis pulse motor driver, a Y axis pulse motor driver, an X axis pulse motor., a tilt motor driver, a Z axis head motor having a minute ?Y axis driver, a stylus and a vacuum pump whereby photographs of faces, addresses, names, autographs, the images for engraving information identifying one's identity, the images from a digital camera, scanner or other information taken from a computer through a network can be automatically and correctly engraved on identification cards such as passports, drivers' licenses, employee certificates or credit cards.

Abstract: An apparatus for engraving images on a passport, credit card, identification card, or the like, and its adaptor for use in the apparatus, the apparatus comprising a personal computer, a controller, a vibration-preventing unit, an X axis pulse motor driver, a Y axis pulse motor driver, an X axis pulse motor, a tilt motor driver, a Z axis head motor having a minute &Dgr;Y axis driver, a stylus and a vacuum pump whereby photographs of faces, addresses, names, autographs, the images for engraving information identifying one's identity, the images from a digital camera, scanner or other information taken from a computer through a network can be automatically and correctly engraved on identification cards such as passports, drivers' licenses, employee certificates or credit cards.