Abstract: Method for judging a color difference between a color of an object and a reference color and apparatus therefor in which it is judged at first if the color difference exists within a predetermined range in which it is difficult to determine whether or not the color difference is definite and, if it exists within the predetermined range, the color difference is judged whether it is substantial or nealigible according to rules according to Fuzzy inference.

Abstract: A mixing machine has a rotor which can be displaced along an axis. The rotor and its drive shaft are rotatably supported by a casing and a cylindrical shaft respectively. A motor for driving the rotor is mounted on a support connected to the end of the cylindrical shaft. The cylindrical shaft can be displaced along the axis. At the lowermost position, holes in a plate of the casing communicate with a discharge port in the structure supporting the cylindrical shaft, whereby rotation of the rotor forces the tank contents out the discharge port.

Abstract: A combined magnetic tape head having a recording head and a reproducing head disposed in a side by side relationship with a recessed wedge shaped area therebetween. A shielding plate is interposed between the heads to reduce cross feed therebetween. The top portion of the shielding plate is bent into L-shape so that the bent tip confronts the recording head. The remainder of the wedge shaped area is covered with a resin material, or an auxiliary plate can be positioned over the plate extending between the heads. In order to maintain the combined head free from dust accumulation, the top portion of the L-shaped shielding plate or the auxiliary plate is tapered so that it has a substantially trapezoidal cross-section with either straight or curved inclining sides.

Abstract: A combined magnetic tape head for use in recording equipment comprises a recording head covered by a shield case, a playback head covered by a shield case and a flat chip for providing a preferable wrap angle of recording tape. The recording and the playback heads are combined into a unitary element by means of a tightening mechanism and/or adhesive agnets. The shield cases are provided at their arcuate front surfaces facing the recording tape with cut portions which are adapted to receive the flat chip, thereby making it possible to readily position the flat chip at a desired position.