Abstract: A digital electrophotographic copying apparatus, comprising; document reading section having a start-up process for reading documents and producing corresponding image data, image storage section having a start-up process for temporarily storing the image data obtained from the document reading means, image printing section having a start-up process for printing document copies according to an electrophotographic process based on the image data stored in the image storage means, job control section for starting the document reading of the document reading means and the image storing of the image storage means upon switching electrical power to the digital electrophotographic copying apparatus and upon an indication of completion of the document reading section start-up process and the image storage section start-up process before receiving an indication of completion the image printing section process.

Abstract: A digital electrophotographic copying apparatus comprising; document reading section for reading a document image and for generating image data corresponding to the document image, image storage section for temporarily storing the image data, image printing section having a fuser for producing copy images on sheets of paper based on the image data stored in the image storage section and according to an electrophotographic process, wherein the printing section operates in parallel with the reading section and the printing section operates individually, electric power supply setting unit for variably setting the level of electric power supplied to the fuser, cycle indication unit for indicating whether the printing section is operating in parallel with the reading section, or whether the printing section is operating individually, and electric power selection unit for controlling the electric power supply setting unit based on the indication obtained from said cycle indication unit.

Abstract: A digital image recording system having an image read section for reading an image on an original, data storage means for storing image data as read by the image read section, and an image output section for outputting the image data read out of the storage means in the form of a hard copy of the document. The digital image recording system comprises transmission data amount select means for switching, for every page, the color and density of each pixel of the image data as read by the image read means and transferred to the storage means. Format select means switch the output format of the data image output section with every page according to the switched transmission data amount. Job entering sets a copy job, such as the type of documents, page order and the number of copies. Control means control the preset processing unit, the amount of transmission data in the data amount select means, and the output format in the output format select means according to input data in the job entering means.

Abstract: The present invention is directed to a refining process for removing impurities from 1,3-dimethyl-2-imidazolidinone (DMI) by the use of a composite salt; and a process for preparing an aromatic polyamide having a high polymerization degree from an aromatic diisocyanate and an aromatic dicarboxylic acid by using, as a reaction solvent, DMI purified by the above-mentioned process.

Abstract: An aromatic polyamide is produced by subjecting an aromatic diisocyanate and an aromatic dicarboxylic acid to polycondensation in the presence of an alkali metal compound and/or an alkaline earth metal compound as a catalyst in an aprotonic polar solvent. The aromatic polyamide can be rendered suitable for use in the production of high-tenacity fibers by charging in advance the solvent, aromatic dicarboxylic acid and catalyst in a mixing system, reducing the water content in the mixing system to at least 50 ppm and then introducing the aromatic diisocyanate to conduct the polycondensation.

Abstract: A process for copolymerizing lactide and glycolide by using a specific amount of stannous octoate as a catalyst in the presence of a polymerization regulator at temperature of 200.degree.-230.degree. C. to prepare dl-lactic acid-glycolic acid-copolymers which contain 50-60 mol % of a dl-lactic acid unit and 40-50 mol % of a glycolic acid unit and have inherent viscosity of 0.4-0.6 in chloroform.

Abstract: Blue-colored bioabsorbable surgical fibers are obtained by adding and dispersing a bioabsorbable polymer, which is selected from polyglycolic acid, poly(l-lactic acid) and glycolic acid-l-lactic acid copolymers all of which are useful as surgical fibers, and indigo in a non-aqueous organic solvent having low solubility for the polymer and indigo, heating the resultant dispersion at a temperature below 120.degree. C. to distill off the solvent, thereby to obtain a master batch with the indigo incorporated therein at a high concentration, mixing and kneading the master batch with a fresh supply of the polymer, and then spinning the resultant polymer mixture.

Abstract: An electrostatic charging system for an electrophotographic copying machine comprises a photoreceptor, electrostatic charger, an a.c. high voltage transformer for driving the electrostatic charger and a photoreceptor current detector. The transformer is enclosed with a conductive casing insulated from ground and one output of the secondary winding of the transformer is connected to the casing so that leakage current generated in the transformer is subjected to be fed back to the transformer itself through the conductive casing, avoiding the leakage current to flow into the photoreceptor current detector, whereby photoreceptor current can be detected with accuracy.

Abstract: The present invention is a heat treatment jig for use in the baking process, the frit seal process, and the evacuation process during the manufacture of cathode-ray tubes. It comprises a base and one or more support members formed from a novel material comprising mica, talc, orthoboric acid, boric acid anhydride, and zinc oxide molded under heat and pressure. This novel molded material is superior in its mechanical properties to the substances (asbestos tape, asbestos cement, or boron nitride) used for the support members of conventional heat treatment jigs. In addition, it does not pose a danger to health like asbestos products and it is far lower in cost than boron nitride.

Abstract: An arc resistant insulator composed of a composite composition comprising an insulating base material and a zinc borate hydrate. The insulating base material is composed of aluminum oxide and/or aluminum hydroxide and mica power. The zinc borate hydrate is composed essentially of 2ZnO.3B.sub.2 O.sub.3.3H.sub.2 O. The arc resistant insulator is prepared by mixing the insulating base material with a zinc borate hydrate forming material composed of normal boric acid, boric acid anhydride and zinc oxide and heating and compacting the mixture thus obtained in a closed system at a temperature of at least 155.degree. C. under pressure of at least 50 kg/cm.sup.2.