Abstract: This invention relates to a temporary ink storage member for temporarily storing ink in accordance with pressure changes in an ink tank. The temporary ink storage member comprises a reduced thickness portion forming an ink storage portion and having a comb-toothed longitudinal sectional shape and slit-like ink grooves communicating with the ink storage portion, wherein a plurality of ink grooves are formed symmetrically with one another in cross-section. The present invention relates also to a writing instrument using the temporary ink storage member.

Abstract: A method for producing PLZT generally expressed as (Pb.sub.1-x La.sub.x) (Zr.sub.1-y Ti.sub.y).sub.1-x/4 O.sub.3 (0<x.ltoreq.0.3, 0.ltoreq.y.ltoreq.1.0) comprises the steps of forming a coprecipitated body by reacting solution containing at least one of Pb, La and Ti with a zirconium-containing solution and a precipitation-forming solution, or (a) forming a solution containing at least one of Pb, La and Ti forming PLZT generally expressed as (Pb.sub.1-x La.sub.x) (Zr.sub.1-y Ti.sub.y).sub.1-x/4 O.sub.3 (0<x.ltoreq.0.3, 0.ltoreq.y.ltoreq.1.0) and a zirconium-containing solution and carrying out a hydrolysis reaction to produce a sol body, (b) drying and then presintering the coprecipitated body at a temperature of from 700.degree. to 1300.degree. C. to form a modified zirconia powder, (c) mixing the presintered body with a compound having a remaining component composition of a required PLZT composition, (d) presintering the mixture at a temperature of from 500.degree. to 1000.degree. C.

Abstract: A flow control device comprising a spindle having a disk at its lower end and a handle at its upper end and spring-biased to bring the disk into pressing contact with a disk seat within a case, a closure having a top wall, and at least one rollable member resting on the upper surface of the closure top wall and mounted on the spindle at an upper end portion thereof projecting upward from the upper surface of the closure top wall. The closure is formed in the upper surface of its top wall with a lower recessed portion for the rollable member to partly fit in, an upper recessed portion for the rollable member to partly fit in and a slanting guide face between the two recessed portions. The rollable member is movable by the rotation of the handle to partly fit into the lower recessed portion to thereby hold the disk in pressing contact with the disk seat or to partly fit into the upper recessed portion to thereby hold the disk away from the disk seat.

Abstract: A piezoelectric ceramic composition is disclosed wherein a sintered body having a bismuth layer structure represented by a molecular formula of PbBi.sub.4 Ti.sub.4 O.sub.15 contains 10 to 55 mol % of an oxide of Ca and Ti, namely CaTiO.sub.3, or 1 to 15 mol % of an oxide of Sr and Ti, namely, SrTiO.sub.3. The bismuth layer structure of PbBi.sub.4 Ti.sub.4 O.sub.15 has a positive dielectric-constant-temperature characteristic, and CaTiO.sub.3 or SrTiO.sub.3 is obtained by sintering as an added substance exhibiting a negative dielectric-constant-temperature characteristic. Since the added substance is added to the piezoelectric ceramic composition so that the temperature changes in both dielectric constants are mutually cancelled out, thereby maintaining the piezoelectric constants at a substantially fixed level.

Abstract: Radioactive organic wastes, such as granular or powdered ion exchange resins and organic filter aids, are treated by oxidation decomposition using hydrogen peroxide in the presence of iron ions in an aqueous medium under refluxing an effluent which is condensed from evaporated components during the oxidation. Condensed water containing a very small amount of organic matter is obtained.

Abstract: There is provided an ink guide for a writing instrument, which is made of a synthetic resin. The synthetic resin has features (a) to (d) given below in the molecular structure or a derivative of such synthetic resin:(a) the molecular structure has a benzene nucleus in a main chain;(b) the benzene nucleus is coupled via an ether linkage;(c) two ether linkages as the ether linkage noted above are present in each recurrence; and(d) the molecular structure has a ketone group.Examples of the synthetic resin noted above are polyetherimides and polyetheretherketones.

Abstract: A method of treating radioactive waste water generated during chemical decontamination at nuclear power facilities is disclosed. Decontaminating agents, with organic acids, and normally containing inhibitors and surface active agents, are decomposed by oxidation using hydrogen peroxide, at a temperature of 60.degree.-90.degree. C., in the presence of copper ions, or copper ions and iron ions, as catalysts.

Abstract: A method of aligning a first object and a second object comprises the steps of detecting, in at least two directions of detection in each examination region of which is included the superposed portion of a first area type mark formed on the first object and a second area type mark formed on the second object when the two marks are seen from a predetermined direction, the lengths of the superposed portion and the non-superposed portion of the marks in the first and second objects or the images thereof, and comparing the detected lengths and operating a positional deviation.

Abstract: A press apparatus for planar members is provided with a first transfer table for transferring a first planar member to a press position, a second transfer table for transferring a second planar member to the press position substantially simultaneously with the first transfer table, a device for aligning the first and second planar members, a device for effecting the parallel feeding of the first and second planar members, and a device for pressing the first and second planar members with a predetermined pressure.

Abstract: Radioactive organic wastes such as anion-exchange resins, chelate resins and organic filter sludges are readily oxidized by reacting hydrozen peroxide in an aqueous medium in the presence of iron-ions or both iron-ions and cation-exchange resin to be decomposed to carbon dioxide and water. Contact between the wastes to be decomposed and hydrogen peroxide is preferably conducted by continuously feeding hydrogen peroxide or both hydrogen peroxide and the wastes to be decomposed to the reaction zone.