Abstract: A lithographic printing plate precursor is disclosed, comprising a metal support having formed thereon an anodic oxide film, and an image-forming layer containing a light-to-heat converting agent, or a light-sensitive layer capable of image-forming with infrared laser exposure provided in this order from the support.

Abstract: An aperture stop mechanism is composed of a small number of components, and accurately controls the position of a member that defines the rim of an aperture. The aperture stop mechanism (2) includes an aperture base plate (21), two aperture blades (22, 23), and a motor(24). The aperture blades (22, 23) are individually pivotable about pins (21a, 21b) provided on the aperture base plate (21). One aperture blade (22) has two gears (22a, 22b) formed along arcs about the pin (21a) with different pitch circle radii. The other aperture blade (23) has a gear along an arc about the pin (21b). The gear (22b) meshes with a motor gear (25), and the gear (22a) meshes with the gear (23a).

Abstract: The present invention relates to a plasma processing apparatus that introduces a process gas into an airtight processing container, that applies a radio frequency power to generate plasma, and that conducts a plasma process to an object to be processed arranged in the processing container. The plasma processing apparatus of the present invention includes: an electrode unit arranged in the processing container, the electrode unit having an electrode for applying the radio frequency power, and a space portion arranged in the electrode unit, the space portion insulating the electrode and the processing container from each other. The space portion is communicated with an atmospheric air outside the processing container.

Abstract: A lithographic printing plate support is provided which becomes a support of a PS plate which has excellent ability to withstand repeated printing, and in which defects in appearance, such as dirtying and the like, do not occur. Also provided are a method of manufacturing the lithographic printing plate support and a PS plate which has such merits.

Abstract: A lithographic printing plate support is provided which becomes a support of a PS plate which has excellent ability to withstand repeated printing, and in which defects in appearance, such as dirtying and the like, do not occur. Also provided are a method of manufacturing the lithographic printing plate support and a PS plate which has such merits.

Abstract: The present invention provides a method for preparing an aluminum support for lithographic printing plate, the aluminum support for a lithographic printing plate obtained by the method and a presensitized plate using the same, characterized in that anodizing treatment is performed on an aluminum plate after hydrochloric acid electrolytic graining treatment if necessary, nitric acid electrolytic graining treatment are performed on the aluminum plate at a specified ratio of quantities of electricity, and with this method, a lower-purity aluminum plate could be used and a obtained support for a lithographic printing plate is excellent in press life and scum resistance when a lithographic printing plate is prepared.

Abstract: A lithographic printing plate support is provided which becomes a support of a PS plate which has excellent ability to withstand repeated printing, and in which defects in appearance, such as dirtying and the like, do not occur. Also provided are a method of manufacturing the lithographic printing plate support and a PS plate which has such merits.

Abstract: An electrolytic apparatus, for supporting a lithographic printing plate, including a guide roller for transporting an aluminum web. The guide roller includes a skeleton section formed with a strong material, a liquid contact section on the surface of the skeleton section, and a nonwoven fabric is provided on the liquid contact section and contacts a surface of an aluminum web. The liquid contact section is formed with a fluororesin coating of 100-3000 &mgr;m in thickness, and the insulation resistance value of the fluororesin coating is 105 &OHgr;cm or more in volume resistivity. The nonwoven fabric is formed mainly with polyphenylene sulfite or fluororesin of 5-50 mm in thickness. Additionally, the nonwoven fabric is condensed in the direction of the guide roller axis, and is treated with a surface finish so as to have a surface hardness in the range of 50-95.

Abstract: A lithographic printing plate precursor is disclosed, comprising a metal support having formed thereon an anodic oxide film, and an image-forming layer containing a light-to-heat converting agent, or a light-sensitive layer capable of image-forming with infrared laser exposure provided in this order from the support.

Abstract: A lithographic printing plate support is provided which becomes a support of a PS plate which has excellent ability to withstand repeated printing, and in which defects in appearance, such as dirtying and the like, do not occur. Also provided are a method of manufacturing the lithographic printing plate support and a PS plate which has such merits.

Abstract: Electrolytic apparatus of support for lithographic printing plate is disclosed that electrolyticaly treats aluminum web in acid electrolyte wherein the guide roller for aluminum web transportation comprises a skeleton section formed with strong material of intenisty, a liquid contact section on the surface of the skeleton section, and nonwoven fabric which is provided on the contact surface with the aluminum web.

Abstract: This invention provides an apparatus for electrolytic treatment capable of removing the ununiformity according to the frequency and can achieve high treating speed and high current density treatment, which comprises etching a metal web electrolytically using alternating waveform current continuously, wherein a frequency-variable means having an ability to vary frequency of an electric power supply of said alternating waveform current arbitrarily is provided, and a method therefor.

Abstract: A process for roughening a surface of a support for a lithographic printing plate in which an electric current is supplied between a metal web and an electrode facing the metal web in an electrolyte containing metal ions so that the metal web is subjected to electrochemical processing continuously, 1-20 pause sections are provided in the electrochemical processing and the time taken for passage through once processing pause section in the electrochemical processing is set to 1-30 seconds. With the process, the grain shape can be controlled with no troublesome condition setting to improve a scumming resistance without deteriorating a printing durability and a fill-in reduction so that the plate has superior performance.

Abstract: A method of producing a support for a planographic printing plate which comprises roughening a surface of an aluminum plate electrochemically, etching the surface by 0.01 to 20 g/m.sup.2 with alkali, and roughening the surface electrochemically in an electrolytic solution containing hydrochloric acid and/or a water-soluble hydrochloride salt which forms hydrochloride ion or nitric acid and/or a water-soluble nitrate salt which forms nitrate ion as the principle component.

Abstract: In a pump, a piston rod is mounted for lost motion on a piston head so that when the piston rod 31 is advanced by a full stroke in a forward direction from a fully retracted position, only the piston rod moves for an initial stroke portion S2, then a piston head is also advanced with the piston rod for a final stroke portion which is equivalent to a difference between the full stroke S1 and initial stroke portion S2 (S3=S1-S2), and a liquid inside said cylinder is expelled from the exhaust port by a quantity corresponding the final stroke portion S3. When the piston rod is being withdrawn in the return direction, only the piston rod is moved during the initial stroke portion causing residual liquid in a passageway from the cylinder to the exhaust port to be sucked back to the cylinder.

Abstract: A metal halide lamp comprises a glass tube defining a discharge space and a pair of electrodes provided in the glass tube for generating a discharge therebetween. The metal halide lamp has mercury and halogen fillings comprising bromine and iodine contained in the glass tube. The mol ratio of the bromine to the halogen fillings is 0.3 to 0.7. The metal halide lamp has metal reacting with the halogen and emitting light in the glass tube by the discharge. The metal comprises tin, sodium, thallium and indium. The tin contained in the glass tube is at the amount of 1 to 14 .mu..multidot.mol per 1 cc of discharge space. Each mol ratio of the amount of the sodium, the thallium and the indium to the amount of the tin is not less than 0.2, respectively. The lamp has a color temperature of more than 4000.degree. K. without sacrificing efficiency or color rendition.

Abstract: A single-sealed metal-vapor discharge lamp forms a press sealed portion on one end to seal in a discharge space starting noble gas, light emission metal, and mercury. The discharge lamp has a pair of electrodes with bent portions whose tip ends are bent opposite to each other in the discharge space; a pair of inner metallic foil conductors, to each one end of which the proximal ends of the electrodes are joined; and an arc tube enclosing a pair of internal lead wires, each one end of which is joined to the other end of the inner metallic foil conductors. The electrodes which are arranged approximately parallel in the arc tube. A bend angle .theta. of the bent portions arc is 60.degree..ltoreq..theta..ltoreq.120.degree., and the curvature radius R of the periphery of the bent portions is approximately R.gtoreq.1.2d (where, d is wire diameter of the electrode rod).

Abstract: A metal vapor discharge lamp has a small arc tube of a single end type. The maximum and minimum thicknesses of the wall of the arc tube and the ratio of the minimum thickness to the maximum thickness are set to the values in predetermined ranges. The set thicknesses prevents breakage of the arc tube and deterioration of the lamp characteristics.

Abstract: An electrolytic treatment apparatus is provided in which one or more electrolyte discharge outlets and one or more electrolyte supply inlets are provided between main counter electrodes so that the concentration and temperature of the electrolytic treatment solution at the the inlets and at the outlets can be made close to one another. As a result, uniformity and fineness in grains can be maintained, electrolysis efficiency can be raised, and the production speed can be improved.

Abstract: A single side-sealed metal vapor discharge lamp is disclosed which includes a discharge tube having a sealed section at one end and a discharge region defining envelope at the other end, a pair of metal foils sealed at the sealed section and a pair of electrodes, the discharge region of the discharge tube containing a rare gas for starting and a filled gas containing mercury and light emitting metal. The electrodes are each comprised of a rod connected to the metal foil and a coil of at least one turn mounted on the forward end portion of a bent end portion of the rod, the coils being oppositely spaced apart by a predetermined distance in the discharge region. The coil is formed of a higher melting point material than a surface material of the forward end portion of the bent portion of the rod. With the length from the bent portion to the forward end of the rod indicated by L1, the length of the coil by L2 and the wire diameter of the coil by d, the following inequalities are satisfied: L1.ltoreq.3d and d/2.