Seikosha Co., Ltd.

Toyo Ink Manufacturing Company

Hayashiseiko Kabushikikaisha

Berger Instruments, Inc.

World Surveying Instrument Co., Ltd.

Mikio Hayashi

Nobuyuki Tomiya

Hiroshi Sato

Fumio Otsuka

Keiichiro Takahashi

Masahiro Nishida

Shigeki Kato

Hitoshi Maki

Takenori Funatsu

Seiki Mizutani

Masatoshi Momose

Haruo Inoue

Hideto Noguchi

Kazuaki Ikeda

Koichi Kimura

Yuichi Yamakawa

Katsuhiko Sawamura

Yoichi Inuzuka

Yoshitaka Ohtomo

Shinichi Azuma

Hideko Noguchi

Toshio Furubayashi

Osamu Aihara

To provide an oil seal removing method that may dispense with a step for forming a hole to an iron core in the oil seal by using a drill and may be applied, as desired, even in a narrow space, and to provide a seal removal tool that is superior in versatility to a taper screw type tool screwed into an inner diameter portion of the oil seal, an L-shaped jaw ( ) formed with arcuate portions ( and ) at its tip end portion, and a retainer plate ( ) with holes ( ) at its body portion is prepared. The L-shaped jaw ( ) is pressingly inserted into a contact interface between an oil seal body ( ) and a crankshaft ( ). Next, the retainer plate is tilted through degrees to engage the jaw ( ) with an end face of the iron core ( ). Next, a tip (tip end) ( ) of a driver ( ) is inserted into the hole ( ), and a grip of a lever is drawn as indicated by an arrow ( ) while abutting the tip (tip end) ( ) against an end face ( ) of a pulley shaft. Thus, it is possible to draw the body ( ) of the oil seal in an axial direction.

Method for removing an oil seal

According to the present invention, a resin is added to crude copper phthalocyanine comprising an &agr;-form and a &bgr;-form crystals in combination and dry-milling is performed in a deoxygenated atmosphere, to provide copper phthalocyanine pigment composition of superior quality which reduces considerable expenditure of time and labor associated with the pigmentation process of crude copper phthalocyanine and the printing ink production process of a pigment, and printing ink comprising &bgr;-form copper phthalocyanine pigment superior quality.

Process for preparing pigment composition, pigment composition and its use

Process for producing printing ink

A process for the production of a phthalocyanine pigment having a clear color tone, a high tinting strength and a finely milled structure by an efficient and economical process, in which the pigmentation from a phthalocyanine crude can be carried out without removing an aromatic hydrocarbon solvent used in the synthesis of the phthalocyanine crude, the process comprising thes steps of (a) reacting phthalic anhydride or its derivative, urea or its derivative and a catalyst in an organic solvent to synthesize a phthalocyanine crude, (b) wet-milling a slurry of the synthesized phthalocyanine crude in the presence of a milling medium without removing the aromatic hydrocarbon solvent, and (c) removing the organic solvent from the slurry of the milled product, purifying the milled product and drying the milled product with a spray type dryer.

Process for the production of phthalocyanine pigment

According to the present invention, a resin is added to crude copper phthalocyanine comprising an .alpha.-form and a .beta.-form crystals in combination and dry-milling is performed in a deoxygenated atmosphere, to provide copper phthalocyanine pigment composition of superior quality which reduces considerable expenditure of time and labor associated with the pigmentation process of crude copper phthalocyanine and the printing ink production process of a pigment, and printing ink comprising .beta.-form copper phthalocyanine pigment superior quality.

Process for preparing pigment composition, pigment composition and its

The present invention is a method for preparing a .beta.-form copper phthalocyanine pigment comprising the steps of; dry milling crude copper phthalocyanine at a temperature between 110.degree. and 200.degree. C., and transforming an .alpha.-form crystal to a .beta.-form crystal by treating the resulting .alpha.-.beta. mixture of copper phthalocyanine in an organic solvent or a liquid mixture of water and an organic solvent. The preparation method of the present invention offers a .beta.-form copper phthalocyanine pigment at lower cost having equivalent or superior quality in color strength, clearness, fluidity and hue compared to the pigment produced by the conventional salt milling method.

Process for producing .beta.-form copper phthalocyanine pigment

A process for producing highly pure 6,13-dihydroquinacridone, which is a suitable intermediate for effectively producing a quinacridone pigment, for a short period of time at high yields, the process comprising providing a cylindrical reactor, providing an atmosphere free of oxygen in the cylindrical reactor, heating the cylindrical reactor so that the temperature of at least a surface of an inner wall of a cylinder of the cylindrical reactor is in the range of from 250.degree. to 400.degree. C., introducing a powder of 2,5-di(arylamino)-3,6-dihydroterephthalic acid dialkyl ester or a mixture of 2,5-di(arylamino)-3,6-dihydroterephthalic acid dialkyl ester with a liquid through a feed port provided in an upper portion of the cylindrical reactor, keeping the powder or the mixture in substantial contact with the inner wall of the cylindrical reactor so that an intramolecular alcohol-elimination reaction of the 2,5-di(arylamino)-3,6-dihydroterephthalic acid dialkyl ester takes place to form 6,13-dihydroquinacridone, and taking out the 6,13-dihydroquinacridone through an outlet provided in a lower portion of the cylindrical reactor.

Process for the production of 6,13-dihydroquinacridones and apparatus

A printing method to increase the printing speed of a dot printer. Before printing on the basis of the dot data representative of an original dot pattern showing fonts, graphics and the like, the original dot pattern is converted by converting M (M .gtoreq.3) dots successive in the line direction into N (M &gt;N .gtoreq.2, M.noteq.2N) dots. Then, printing is performed on the basis of the thus converted dot data. In a modification, conversion is performed by converting each dot into n (n.gtoreq.2) successive intermediate dots in the line direction and when 2n or more intermediate dots are successive, selecting every m {(2n -1).gtoreq..sub.m .gtoreq.(n+1)}-th intermediate dot. In another modification, pattern conversion is effected by converting each dot into n (n.gtoreq.2) successive intermediate dots, in a zone where printing is possible at the same dot interval as that of the original dot pattern, selecting only dots out of the intermediate dots that are arranged at the same dot interval as that of the original dot pattern, and in the other zone, selecting every m {(2n -1).gtoreq..sub.m .gtoreq.(n+1)}-th intermediate dot.

Printing method for use with dot printer

A printing method to increase the printing speed of a dot printer. Before printing on the basis of the dot data representative of an original dot pattern showing fonts, graphics end the like, the original dot pattern is converted by converting M (M.gtoreq.3) dots successive in the line direction into N (M&gt;N.gtoreq.2, M.noteq.2N) dots. Then, printing is performed on the basis of the thus converted dot data. In a modification, conversion is performed by converting each dot into n (n.gtoreq.2) successive intermediate dots in the line direction and when 2n or more intermediate dots are successive, selecting every m{(2n-1).gtoreq.m.gtoreq.(n+1) }-th intermediate dot. In another modification, pattern conversion is effected by converting each dot into n(n.gtoreq.2) successive intermediate dots, in a zone where printing is possible at the same dot interval as that of the original dot pattern, selecting only dots out of the intermediate dots that are arranged at the same dot interval as that of the original dot pattern, and in the other zone, selecting every m{(2n-1).gtoreq.m.gtoreq.(n+1) }-th intermediate dot.

A pigment composition which comprises a phthalocyanine pigment, a phthalocyanine derivative (A) of the formula (1),

Pigment composition, printing ink and coating composition

A printing method to increase the printing speed of a dot printer. Before printing on the basis of the dot data representative of an original dot pattern showing fonts, graphics and the like, the original dot pattern is converted by converting M (M.gtoreq.3) dots successive in the line direction into N (M&gt;N.gtoreq.2, M.noteq.2N) dots. Then, printing is performed on the basis of the thus converted dot data. In a modification, conversion is performed by converting each dot into n (n.gtoreq.2) successive intermediate dots in the line direction and when 2n or more intermediate dots are successive, selecting every m {(2n-1).gtoreq.m.gtoreq.(n+1)}-th intermediate dot. In another modification, pattern conversion is effected by converting each dot into n (n.gtoreq.2) successive intermediate dots, in a zone where printing is possible at the same dot interval as that of the original dot pattern, selecting only dots out of the intermediate dots that are arranged at the same dot interval as that of the original dot pattern, and in the other zone, selecting every m {(2n-1).gtoreq.m.gtoreq.(n+1)}-th intermediate dot.

A piezoelectric printer including a piezoelectric actuator having piezoelectric elements for driving printing elements. A drive voltage applied to the piezoelectric elements for printing operations fluctuates with a predetermined period and amplitude. The drive voltage applied to the piezoelectric elements can fluctuate with a period or amplitude related to a gradation signal for effecting printing gradation.

Piezoelectric printer

A serial printer for printing recording paper has a printing head movable at a right angle with respect to the feeding direction of the recording paper. Vibration applying means, such as a piezoelectric element, is mounted on the outer circumference of the printing head for vibrating the printing head finely during the printing operation.

Serial printer

A serial printer includes a reciprocably mounted carriage having a printing head, and a generally flat flexible cable extends between the carriage and a drive circuit. A generally flat flexible reinforcing plate comprising a shield electrode is disposed in superimposed relationship to the flexible cable.

Growing community of inventors

Tokyo, Japan

Mikio Hayashi