Abstract: A multi-color image-forming apparatus having image-forming sections for a plurality of different colors can include an optical sensor having a light-casting section that casts single polarized light and a light-receiving section that receives polarized light different from the cast light. A pattern for detecting toner positions can be used in which toner having high reflectance to a particular light emission wavelength is independently formed. In addition, other patterns in which toner having low reflectance to the particular light emission wavelength are partially formed on a central portion of the pattern of high reflection toner by using the high reflection toner as a foundation. The apparatus can detect each toner pattern by the optical sensor to correct the color shift of each color.

Abstract: A steam turbine (10) with heating steam extraction includes a plurality of turbine sections (11, 12, 15, 17, 19, 20) for the high pressure, medium pressure and low pressure ranges, which turbine sections (11, 12, 15, 17, 19, 20) are arranged in each case in a separate casing and connected by a common shaft (28), and which includes one high pressure turbine (11), at least one subsequent medium pressure turbine (15, 17), which is connected on the outlet side to two series-connected heaters (21, 24) of a district heating circuit (27), and one subsequent low pressure turbine (19, 20). Safe control of high volumetric flows of steam is achieved by providing, for heating steam extraction, two medium pressure turbines (15, 17), which operate in parallel, in separate casings, and which are connected on the outlet side in each case to one of the heaters (21, 24).