Abstract: According to one embodiment, a tablet printing apparatus includes: a first rotator having an inner space; a duct configured to communicate with the inner space of the first rotator; a suction pipe configured to suck inside the duct; a second rotator arranged to face the first rotator across the duct; a conveyor belt wrapped around the first rotator and the second rotator; and a print head that performs printing on a tablet held on the conveyor belt. The conveyor belt includes a plurality of suction holes which communicate with the inner space of the first rotator and that of the duct, and are arranged in the rotation direction of the first rotator. The first rotator and the duct constitutes a suction chamber that applies a suction force to those of the suction holes of the conveyor belt located around the outer periphery of the first rotator and the duct.

Abstract: According to one embodiment, a tablet printing apparatus includes: a conveyor configured to convey tablets sequentially supplied thereto while sucking and holding the tablets by a suction chamber 14; a print head located to face the conveyor and configured to elect ink to the tablet conveyed by the conveyor to perform printing; and partition walls 144, 144 and suction paths 1421, 1422 that serve as a suction force adjusting device configured to reduce a suction force applied to the tablet at a conveyance position facing the print head to be lower than a suction force applied to the tablet at conveyance positions in front of and behind the conveyance position.

Abstract: According to one embodiment, a tablet printing apparatus includes a conveyor configured to convey tablets sequentially supplied while sucking and holding the tablets; a print head arranged to face the conveyor to perform printing on each of the tablets being conveyed; a detector arranged upstream of the print head to detect the posture of each of the tablets; and a print condition tester arranged downstream of the print head to check print condition on each of the tablets. Suction force applied to the tablets is reduced at least in an area from a detection position to a print condition check position than in other area.

Abstract: According to one embodiment, a tablet printing apparatus includes: a conveyor belt configured to convey a tablet; a first suction path configured to suck the tablet to hold the tablet on the conveyor belt and suck the conveyor belt while allowing the conveyor belt to convey the tablet; a second suction path configured as a different path from the first suction path to suck only the conveyor belt while allowing the conveyor belt to convey the tablet; and a printer configured to perform printing on the tablet conveyed by the conveyor belt.

Abstract: According to one embodiment, a tablet printing apparatus includes a conveyor configured to convey tablets sequentially supplied while sucking and holding the tablets; a print head arranged to face the conveyor to perform printing on each of the tablets being conveyed; a detector arranged upstream of the print head to detect the posture of each of the tablets; and a print condition tester arranged downstream of the print head to check print condition on each of the tablets. Suction force applied to the tablets is reduced at least in an area from a detection position to a print condition check position than in other area.

Abstract: According to one embodiment, a tablet printing apparatus includes: a first rotator having an inner space; a duct configured to communicate with the inner space of the first rotator; a suction pipe configured to suck inside the duct; a second rotator arranged to face the first rotator across the duct; a conveyor belt wrapped around the first rotator and the second rotator; and a print head that performs printing on a tablet held on the conveyor belt. The conveyor belt includes a plurality of suction holes which communicate with the inner space of the first rotator and that of the duct, and are arranged in the rotation direction of the first rotator. The first rotator and the duct constitutes a suction chamber that applies a suction force to those of the suction holes of the conveyor belt located around the outer periphery of the first rotator and the duct.

Abstract: According to one embodiment, a tablet printing apparatus includes: a conveyor belt configured to convey a tablet; a first suction path configured to suck the tablet to hold the tablet on the conveyor belt and suck the conveyor belt while allowing the conveyor belt to convey the tablet; a second suction path configured as a different path from the first suction path to suck only the conveyor belt while allowing the conveyor belt to convey the tablet; and a printer configured to perform printing on the tablet conveyed by the conveyor belt.

Abstract: According to one embodiment, a tablet printing apparatus includes: a conveyor configured to convey tablets sequentially supplied thereto while sucking and holding the tablets by a suction chamber 14; a print head located to face the conveyor and configured to elect ink to the tablet conveyed by the conveyor to perform printing; and partition walls 144, 144 and suction paths 1421, 1422 that serve as a suction force adjusting device configured to reduce a suction force applied to the tablet at a conveyance position facing the print head to be lower than a suction force applied to the tablet at conveyance positions in front of and behind the conveyance position.

Abstract: A wavelength conversion element with a Quasi-Phase Matching structure which can suppress the ripples of fluctuation pulse waveforms of a change efficiency in a frequency band of the waveform conversion, without controlling the positions and dimensions of the polarization regions at high precision. The wavelength conversion element of the present invention has a plurality of first and second polarization regions, formed so that dielectric polarizations are inverted from each other, and an optical wave guide which is formed so as to pass through the first and second polarization regions, in a nonlinear optical substrate. And an absolute value of the wavelength conversion efficiency is set by adjusting the positional coordinates of the first and second polarization regions in a light traveling direction.

Abstract: A wavelength conversion element with a Quasi-Phase Matching structure which can suppress the ripples of fluctuation pulse waveforms of a change efficiency in a frequency band of the waveform conversion, without controlling the positions and dimensions of the polarization regions at high precision. The wavelength conversion element of the present invention has a plurality of first and second polarization regions, formed so that dielectric polarizations are inverted from each other, and an optical wave guide which is formed so as to pass through the first and second polarization regions, in a nonlinear optical substrate. And an absolute value of the wavelength conversion efficiency is set by adjusting the positional coordinates of the first and second polarization regions in a light traveling direction.

Abstract: An insulating film is formed on a first principal surface of the substrate. A periodic structure formation zone corresponding to a periodic structure formation region to be formed in the substrate, a plurality of polarization inversion zones corresponding to polarization inversion regions to be formed in a periodic arrangement in the periodic structure formation region, and a connection zone corresponding to a connection region to connect the plurality of polarization inversion regions, are set on the insulating film. The portions of the insulating film in the polarization inversion zones and the connection zone are removed, forming an insulating film pattern which exposes portions of the first principal surface of the substrate.

Abstract: An optical demultiplexer/multiplexer for wavelength division multiplex communication includes: a light irradiating unit for irradiating a spherical wave containing light waves of different wavelengths; optical fibers for respectively receiving the different wavelengths of the demultiplexed light wave; a converting lens for receiving the spherical wave and converting the spherical wave into a parallel wave; WDM filters each for selecting and reflecting the light wave in the parallel wave and transmitting the residual light waves; guide lenses for receiving the light waves reflected by the WDM filters, converging, and transmitting the light waves to the optical fibers; and reflecting mirrors for receiving the light waves and reflecting the light waves toward the WDM filters.

Abstract: An optical demultiplexer/multiplexer for wavelength division multiplex communication has: a light irradiating unit for irradiating a spherical wave comprising light waves of different wavelengths; optical fibers each for receiving the demultiplexed light wave of each wavelength; a converting lens for receiving the spherical wave and converting into a parallel wave; WDM filters each for selecting and reflecting the light wave in the parallel wave and transmitting the residual light waves; guide lenses for receiving the light waves reflected by the WDM filters, converging, and transmitting to the optical fibers; and reflecting mirrors for receiving the light waves and reflecting toward the WDM filters. The parallel wave goes straight, is selected and reflected by the WDM filter, reflected, returned to this WDM filter, selected and reflected again, converged by the guide lens, and demultiplexed by the optical fiber every wavelength.

Abstract: A thermoreversible recording material having its transparency changed in accordance with its thermal history, in particular the rate of cooling and the temperature to which it has been heated, comprises a matrix material and an organic compound of low molecular weight, wherein the matrix material comprises polyvinyl acetal, and the organic compound of low molecular weight comprises a saturated carboxylic acid or derivative thereof. The matrix material may further contains a material selected from a group consisting of epoxy resin, phenol resin, epoxy compound, aldehyde compound and isocyanate compound. A thermoreversible recording medium comprising the above thermoreversible recording material may be selectively heated by a thermal head or the like to record visual information. The visual information may be erased by heating the medium and cooling it slowly.

Abstract: An image recording device which permits repeated thermoreversible recording and erasure of an image, which is useful for creating an image for storage, display or printing of the image or other information. The recording device has a display medium, a recording means to form an image on the display medium, and an erasure means to erase the image formed on the medium. The display medium of the image recording device may have a support member with a recording layer provided on the support member. The display medium has a transparency which is dependent upon its thermal history, and consists essentially of a matrix material of a copolymer of styrene and butadiene, and a saturated carboxylic acid of 10 to 24 carbon atoms. The weight ratio of the matrix material to saturated carboxylic acid in the display medium is from 1:1 to 20:1.

Abstract: An image forming apparatus which permits reversible recording and erasure by a heating means, and permits storage, display, printing or reproduction of an image or other information. The present apparatus thermoreversibly records an image on a matrix material of a copolymer of styrene and butadiene and a low molecular weight, saturated carboxylic acid, preferably containing from 10 to 24 carbon atoms, and where the weight ratio of the matrix material to carboxylic acid is from 1:1 to 20:1.

Abstract: A thermoreversible recording medium which permits reversible recording and erasure to be repeated by use of a heating means, such as a thermal head or a laser, and is used for example, for storage, display or printing of image or other information, comprises a matrix material and an organic substance of low molecular weight. The matrix material essentially consists of a copolymer of styrene and butadiene, and the organic substance is a saturated carboxylic acid. The saturated carboxylic acid may preferably be capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachic acid, behenic acid or lignoceric acid. These compounds are saturated carboxylic acids with 10-24 carbon atoms. The weight ratio between the matrix and the organic substance is set within 1:1 to 20:1.