Abstract: Each cooling roll has parallel grooves formed in the peripheral surface thereof so as to extend in a direction which crosses the direction of the roll axis. The grooves on one of the cooling rolls are at a phase difference from the grooves on the other cooling roll. The grooves are arranged at a pitch of 0.05 to 3.0 mm and each of the grooves has a width of 0.01 to 1.0 mm and a depth of 0.03 to 0.5 mm.

Abstract: According to the present invention, and LED display comprises LED elements in a matrix arrangement of rows and columns on a substrate, only LED elements other than LED elements located in the outermost peripheral rows and columns being utilized to be driven by a driver.

Abstract: Oxygen or a mixed gas containing oxygen, or a chemical flame produced by a mixture of a combustion gas and a combustion-assisting gas containing oxygen, is blown against the surface of molten iron to cause radiation emission. The radiations are divided into components of different wavelengths, and the resulting emission spectra are measured to determine the composition of the molten iron.

Abstract: An electroprinting apparatus is constructed of upper and lower units elevationally openable at the boundary of an ink ribbon travelling path. The upper unit is provided with an ink ribbon feeding reel and an ink ribbon winding reel. An ink ribbon is extended between the reels along the ink ribbon travelling path between the reels. A thermal head unit is mounted at the upper unit opposing the ink ribbon. The lower unit is provided with a paper feeding unit for conveying a paper sheet along the ink ribbon travelling path and a head roller for pressing the paper sheet together with the ink ribbon against the thermal head.

Abstract: A thermal transfer type printing apparatus includes a monochromatic printing section and multi-color printing section. The monochromatic printing section includes a thermal head unit for thermally transferring an ink layer of a black ink ribbon onto a paper sheet according to a black image signal. The multi-color printing section includes a thermal head unit for successively transferring cyan, magenta and yellow layers of a multi-color ink ribbon in an overlap state onto the paper sheet according to image signals for the respective colors.

Abstract: A thermal transfer recording apparatus according to the invention is constructed so that information is recorded by transferring ink from a thermal transfer ribbon to the surface of a transfer sheet by means of a thermal head, and that a second unit can be swung up to be separated from a first unit as required. Sag of the thermal transfer ribbon is removed by feeding the ribbon for a predetermined length when it is detected that the second unit is set on the first unit. Thus, fusion of ink on the thermal transfer ribbon at the start of recording can be prevented.

Abstract: A color printing apparatus includes a scanner for scanning a color document and for converting the reflecting light from the color document into color image signals of black, red, green and blue, and a thermal head unit driven by signals corresponding to complementary colors of the colors of the color signals from the scanner. The thermal head unit, making an ink ribbon to contact the paper intimately, transfers the inks of the ink layers of black, magenta, yellow and cyan on the ink ribbon according to the complementary color signals.

Abstract: A color printing apparatus is provided with a document moving mechanism for reciprocatably moving a color document four times, and a scanner for applying successively white, red, green, and blue lights to the color document during each of the forward movements to produce image signals representative of complementary colors of the color lights. A drum with a paper wound therearound rotates forwardly and reversely in synchronism with the reciprocal movement. At the time of the forward movement of the document and the forward rotation of the drum, the thermal head presses a color ink ribbon against the paper to thermally transfer the ink of the color ink ribbon to the paper. At the time of the reverse rotation of the drum, the thermal head is separated from the drum by means of a solenoid.

Abstract: A chamfering apparatus for opposing end faces of a tubular member. The apparatus includes an abutment member capable of advancing toward or being retracted from a line of extension of the longitudinal axis of the tubular material so as to collide with the end face when advanced, a conveyor for transporting the tubular member toward the abutment member, a chuck provided between the abutment member and conveyor for releasably holding the tubular member on the conveyor, and a cutting tool displaceable relative to the end face of the tubular member received by the abutment member and held by the chuck. The cutting tool is capable of rotating around the longitudinal axis of the tubular member.

Abstract: A vending apparatus has a plurality of cash-less vending machines installed in guest rooms and meeting rooms and at any other suitable places in hotels and supermarkets, and any customers who want to use the vending machines may have their own memory holders from a front or cashier. Upon insertion of the memory holder into the vending machine and depression of a merchandise selection button or the like, a selected merchandise is discharged from the vending machine while sales information such as a code and price of the sold merchandise is stored in memory element in the holder, and when the memory holder is returned and inserted into an accounting machine, the sales information is read out from the memory holder to prepare a bill. The vending machines and the accounting machine are enabled in response to the output from a sensor which detects the insertion of the memory holder.