Fuji Photo Film Company, Limited

Fujifilm Corporation

Keisuke Endo

Hiroyuki Nishida

Hideyuki Uezono

Masayuki Nakagiri

Toru Kusano

In a marking device, by illuminating a laser beam onto an X-ray film which is a light-photosensitive heat-developing photosensitive material, an inner portion of a surface layer is melted, a cavity is formed, and a dot, which projects a surface out in a convex shape, is formed. At this time, an illumination time of the laser beam is controlled in order to control melting of the surface layer. In the marking device, when conveying of an X-ray film is stopped, oscillation of a laser oscillating tube is continued until a predetermined period of time elapses. When stoppage is for a short time, control is carried out such that marking can be started quickly.

Laser marking method

An apparatus for stacking a predetermined number of X-ray films has a sheet member holding device disposed above a stacking position for temporarily holding at least a first X-ray film, and an actuating device for displacing the sheet member holding device from the stacking position to drop the X-ray film held by the sheet member holding device into the stacking position. The apparatus is capable of stacking a plurality of X-ray films highly accurately and efficiently in the stacking position while avoiding damage to the X-ray films.

Apparatus for stacking sheet members, apparatus for measuring dimensions of sheet members, and apparatus for and method of marking sheet members

When laser beams with a wavelength of 9.3 &#x3bc;m or 9.6 &#x3bc;m are used, a pulse width t (&#x3bc;sec) which is a radiation time of the laser beam and an energy density E (kw/cm) of the laser beam on an X-ray film are set such that they meet requirements based on an area A between line segments Aand A. Moreover, when laser beams with a wavelength of a 10-micrometer band, such as 10.6 &#x3bc;m, is used, the pulse width and the energy density are set such that they meet requirements based on an area B between line segments Band B. As a result, since the pulse width t is within a range of equal to or larger than 3 &#x3bc;sec and smaller than 30 &#x3bc;sec, a high-quality marking pattern with excellent visibility can be formed while improving the productivity of the X-ray film.

Device and method for laser marking

By irradiating a laser beam onto an X-ray film that includes a support layer having disposed thereon an emulsion layer, the emulsion layer is melted, numerous minute air bubbles are generated in the emulsion layer, and the emulsion layer becomes convex, whereby a visible dot pattern is formed. The irradiation time and wavelength of the laser beam are selected so that separation is not generated between the support layer and the emulsion layer. By defocusing and irradiating the laser beam, the X-ray film may substantially uniformly receives energy of the laser beam. Moreover, an undersurface layer may also be formed, and the laser beam may be irradiated onto the undersurface layer to form a dot pattern on the undersurface layer. A device and a method for forming a marking pattern representing identification information on a rolled photosensitive material and cutting the photosensitive material into sheets are disclosed.

Laser marking on photosensitive material and photosensitive material including the marking

A photosensitive material in which a fog unnecessary for a photosensitive material is not generated when irradiation of a laser beam and a character or a mark is printed by an array of optically distinguishable dot patterns is provided. When the dot patterns are arrayed by M number in column and N number in row and the character or the mark having a size of A&#xd7;B is printed, the dot pattern has irregularity of no more than S+10 &#x3bc;m, and an almost circular shape of no lower than 100 &#x3bc;m and not more than the smaller diameter either A/M or B/N, when viewed from the emulsion layer side. A surface roughness is set in the range of 0.2 &#x3bc;m to 1.0 &#x3bc;m.

Photosensitive material and laser marking method

A transfer device in which a material which transmits a laser beam LB is employed as an upper mold, and a photothermal conversion layer is formed thereon. A transfer film, at which a transfer material layer is formed, and a workpiece are superposed and pressured between the upper mold and a lower mold. During this pressuring, the laser beam is irradiated in accordance with a pattern of an organic electroluminescent light-emitting layer that is to be formed on the workpiece. Thus, the photothermal conversion layer is heated and the transfer material layer is softened. As a result, the transfer material layer is cleaved and detached from a temporary support, and a component in the transfer material layer that is to form the organic electroluminescent light-emitting layer is transferred to the workpiece. Accordingly, efficient transfer processing is enabled when a transfer material is transferred to a transfer object by a thermal imaging process.

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Shizuoka-ken, Japan

Keisuke Endo