Abstract: The process for producing the albumin preparation of the present invention comprises treating an aqueous albumin solution with an anion exchanger and a cation exchanger and subjecting the solution to heat treatment wherein a polyacrylamide type carrier having a cation exchange group is used as a cation exchanger. By using a polyacrylamide type carrier as a cation exchanger, the polymerization caused by the contaminating proteins can be suppressed, and a highly purified albumin preparation can be obtained.

Abstract: An apparatus for waste water treatment, wherein fluorine contained in waste water is treated into a fluoride through a chemical reaction and sludge containing the fluoride is thickened and dehydrated into a sludge cake, has first and second tanks each packed with calcium carbonate mineral. In the first tank, waster water containing fluorine is agitated by air discharged from an air diffuser and caused to react with the calcium carbonate mineral. Through this reaction of the waste water with the calcium carbonate mineral and action of microorganisms on the surface of the calcium carbonate mineral, a pH value and a fluorine concentration of the waste water is adjusted till the pH value and the fluorine concentration fall within their respective predetermined ranges.

Abstract: An apparatus for waste water treatment, wherein fluorine contained in waste water is treated into a fluoride through a chemical reaction and sludge containing the fluoride is thickened and dehydrated into a sludge cake, has first and second tanks each packed with calcium carbonate mineral. In the first tank, waster water containing fluorine is agitated by air discharged from an air diffuser and caused to react with the calcium carbonate mineral. Through this reaction of the waste water with the calcium carbonate mineral and action of microorganisms on the surface of the calcium carbonate mineral, a pH value and a fluorine concentration of the waste water is adjusted till the pH value and the fluorine concentration fall within their respective predetermined ranges.

Abstract: A wiper blade is provided with an improved lever to yoke connection. The lever has a yoke-fitting part at each end defining a hooking hole with an opening which opens towards the opposite hooking hole. The yoke-fitting part includes an engaging part and a projection which defines the opening. The yoke has a lever-fitting part including a lever-setting shaft for engagement with the hooking hole. To prevent the yoke from dropping off the lever, a protrusion is provided on the lever. The particular wiper blade allows easy assembly and improved strength of the yoke.

Abstract: A magnetic data recording and reading device for a magnetic disk memory device including a spiral cam driven for rotation by a motor, a pivotal arm supporting a magnetic head at one end and a contact member at the other end for contacting the spiral cam, a pressing member for urging the contact member of the pivotal arm to press against the spiral cam, and a pivot for supporting the pivotal arm for pivotal movement. Upon rotation of the motor, the magnetic head at the one end of the pivotal arm is positioned on a magnetic disc to thereby effect magnetic recording and reading of data. The positioning of the magnetic head is effected in such a manner that the spiral cam rotated by the motor has the contact member of the pivotal arm press thereagainst to thereby move the pivotal arm in pivotal movement to permit the magnetic head to search along the magnetic disc.

Abstract: A magnetic head positioning mechanism positions a magnetic head carried on a carriage at a specific location on a magnetic disc through the movement of a belt mounted to a motor spindle of a step motor. The magnetic head positioning mechanism pulls one end of a belt of which the other end is wound or unwound around a motor pulley, thereby to constantly apply a rotation torque and thereby to eliminate an adverse effect by a dead zone due to the hysteresis phenomenon of the step motor. Alternatively, the rotation torque is always applied to the step motor by pulling the carriage in an access direction, thereby to improve the positioning accuracy of the head.