Nippon Light Metal Company, Ltd.

Fuji Photo Film Company, Limited

Other

Yasuhisa Nishikawa

Hirokazu Sakaki

Hideki Suzuki

Kazushige Takizawa

Yoshinori Hotta

Takao Kanai

Tadayuki Katoh

Hirokazu Sawada

Akira Shirai

Kazumitsu Mizushima

Hiroshi Ikeda

Takahiko Watai

Yoichi Ishii

Tomohide Yamagishi

Misako Kawasaki

In order to produce an aluminum alloy substrate for a lithographic printing plate wherein grain structure refining and homogenizing are promoted, and the uniformity of the appearance of the grained surface is particularly improved, the process of the present invention comprises the steps of: homogenizing an aluminum alloy ingot comprising 0.10 to 0.40 wt % of Fe, 0.03 to 0.30 wt % of Si, 0.004 to 0.050 wt % of Cu, 0.01 to 0.05 wt % of Ti, 0.0001 to 0.02 wt % of B and the balance of Al and unavoidable impurities, at temperatures of 350 to 480&deg; C., successively hot-rolling the ingot with a plurality of passes in such a manner that the aluminum alloy is not recrystallized prior to the hot rolling of the final pass and recrystallized at least in the surface layer of the hot-rolled plate by only the hot rolling thereof to form a recrystallized structure having an average recrystallized grain size of less than 50 &mgr;m in a direction normal to the rolling direction, and cold-rolling the hot-rolled plate. The reduction of the plate in the hot rolling of the final pass is desirably at least 55%.

Process for producing aluminum alloy substrate for lithographic printing plate

A continuous-cast and cold-rolled aluminum alloy sheet for a cross fin, characterized by a chemical composition consisting of not less than 0.05 wt % and less than 0.30 wt % Fe, more than 0.03 wt % and less than 0.10 wt % Mn, an amount of a grain refining agent, and the balance of Al and unavoidable impurities including less than 0.15 wt % Si; a microstructure substantially composed of subgrains; and an electrical conductivity of 55% IACS or more. The aluminum alloy sheet is advantageously produced by a process including the steps of continuous-casting an aluminum alloy melt having the above-mentioned chemical composition to form a cast sheet having a sheet thickness of not more than 30 mm; cold-rolling the cast sheet at a reduction of 90% or more, followed by a temper annealing at a temperature of from 250 to 300.degree. C. for a holding time of 2 hours or more. The present inventive aluminum alloy sheet has a high formability such that a cross fin having a large fin pitch applicable to any type of heat media pipe having various sizes can be successfully formed by a simplified production process which is easy to manage and also reduces the production cost, and by using less viscous volatile lubricants causing no substantial environmental pollution.

Aluminum alloy sheet for cross fin and production thereof

A continuously cast and rolled aluminum alloy substrate for an electrolytically grainable lithographic printing plate, consisting of 0.20 to 0.80 wt. % of Fe and the balance of Al, grain-refining elements and unavoidable impurities including 0.3 wt. % or less of Si and 0.05 wt. % or less of Cu, the amount of Fe present in solid solution being not more than 250 ppm, the amount of Si present in solid solution being not more than 150 ppm, and the amount of Cu present in solid solution being not more than 120 ppm.

Aluminum alloy substrate for lithographic printing plate and process of

An aluminum alloy substrate for an electrolytically grainable lithographic printing plate, consisting of an aluminum alloy cold-rolled sheet, produced by a continuous casting and rolling process, comprising 0.20 to 0.80 wt % of Fe with the balance consisting of aluminum, grain refining elements, and unavoidable impurities including 0.3 wt % or less of Si and 0.05 wt % or less of Cu, grains in a surface layer portion having a width of not more than 150 .mu.m in a direction parallel to the sheet surface and normal to the direction of cold rolling and a length, in a direction parallel to the direction of cold rolling, of not more than 8 times the width.

Aluminum alloy substrate for electrolytically grainable lithographic

An aluminum alloy substrate for a lithographic printing plate consisting essentially of an aluminum alloy plate containing 0.2 to 0.5% by weight of Si, 0.3 to 0.7% by weight of Fe, 0.004 to 0.02% by weight of Cu, 0.9 to 1.5% by weight of Mn, 0.05 to 0.3% by weight of Mg and 0.01 to 0.04% by weight of Ti and the balance of Al and impurities, in which the surface of said aluminum alloy plate is roughened electrolytically and anodized. The alluminum alloy substrate has high mechanical strength and can also rapidly print a large number of copies with less stain.

Aluminum support for lithographic printing plate

An aluminum alloy support for lithographic printing plates produced by cold rolling an aluminum alloy composed substantially of Mg 0.05 to 3 wt %, Si 0.05 to 0.7 wt %, Zr 0.01 to 0.25 wt %, and Fe 0.05 to 0.4 wt %, with the balance being Al and impurities, and imparting a grained surface to the plate surface has high mechanical strength, good heat softening resistance, excellent water retentive property, and long press life.

Aluminum alloy support for lithographic printing plates

A support for lithographic printing plates is disclosed which comprises a plate of an aluminum alloy containing 0.02 to 0.20% by weight zirconium. The aluminum alloy causes no recrystallization phenomenon at temperatures below 320.degree. C. There is also disclosed a photosensitive lithographic printing plate comprising such a support with a photosensitive layer thereon.

Aluminum-zirconium alloy support for lithographic printing plate

A flat pushbutton tuner wherein button slide assemblies provided with pushbuttons are disposed in parallel with a base plate of the tuner and mounted directly on said plate without providing a housing or base for the button slide assemblies. The base plate is provided with horizontally extending seats and vertically extending seats formed integrally with said base plate for mounting components of the tuner thereon.

Pushbutton tuner

A pushbutton tuner wherein a plurality of tilting actuating links are provided for a slide member for causing cores to move in-and-out of coils and the actuating links are adapted to engage setting pins of frequency regulating members respectively, which are provided on button slides actuatable by push buttons, respectively to effect a selection operation, which tuner is characterized in that a pivotal pin fitted in a hole formed in each of the frequency regulating members has a tapering portion and each of the setting pins also has a tapering portion at a portion where the setting pin engages the actuating link associated therewith.

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Shizuoka, Japan

Yasuhisa Nishikawa