Abstract: Registration patterns are formed plural times at arbitrary positions in the period determined by the conveying drawing fluctuation period detector when forming registration patterns. The average of the color deviation amount obtained from these plural registration patterns is the color deviation amount. As a result, the color deviation amount can be detected accurately. By detecting the accurate color deviation amount, the precision of color deviation correction is enhanced. It hence presents a color image forming apparatus capable of obtaining images of high print quality.

Abstract: Registration patterns are formed plural times at arbitrary positions in the period determined by the conveying drawing fluctuation period detector when forming registration patterns. The average of the color deviation amount obtained from these plural registration patterns is the color deviation amount. As a result, the color deviation amount can be detected accurately. By detecting the accurate color deviation amount, the precision of color deviation correction is enhanced. It hence presents a color image forming apparatus capable of obtaining images of high print quality.

Abstract: A fluidized bed reduction method in which powder raw material, including powder ore or partially pre-reduced powder ore, forms a fluidized bed with, and is sequentially reduced by reducing gas while being moved between a plurality of fluidized bed chambers; and to a fluidized bed reduction reactor which can be used in the same method. The movement of the powder ore between the fluidized bed chambers is carried out giving priority to relatively larger powder particles with the aim of improving the stability of the fluidized bed in the fluidized bed chambers. The adjustment of the reducing power of each fluidized bed chamber is made possible by introducing the reducing gas into the fluidized bed chambers in parallel, whereby an increase in the degree of reduction of the raw material can be realised.

Abstract: Registration patterns are formed plural times at arbitrary positions in the period determined by the conveying drawing fluctuation period detector when forming registration patterns. The average of the color deviation amount obtained from these plural registration patterns is the color deviation amount. As a result, the color deviation amount can be detected accurately. By detecting the accurate color deviation amount, the precision of color deviation correction is enhanced. It hence presents a color image forming apparatus capable of obtaining images of high print quality.

Abstract: An outgoing light from a light source transmits a photo coupler, a single-fiber optical fiber array, an optical wave guide chip, a four-fiber optical fiber array and an optical fiber, and is reversed, and an outgoing light from another end of the photo coupler is received by a light receiving unit to roughly position the respective components. Thereafter, the four-fiber optical fiber array is positioned with respect to the optical wave guide chip in such a manner that the amount of light that reaches the light receiving unit becomes maximum. The adjustment of the optical axis is enabled with only a single light receiving unit without the use of plural expensive light receiving units, and the adjustment of the optical axis can be performed with ease in a short period of time.