摘要:
A writing implement for preventing ink from leaking out from a front end of a tip by absorbing much of a change in pressure inside an ink tank, the implement being a direct liquid type writing implement having an ink tank and an ink flowing portion connecting the ink tank and a writing end, a temporary ink reserve part for temporarily holding ink and an air supplying portion for supplying air to the temporary ink reserve part, the temporary ink reserve part being constituted by a temporary ink reserve groove and an ink guide groove, an ink introducing groove at a vicinity of the ink tank constituting a portion of the ink guide groove, a distance from the writing end to an end portion of the temporary ink reserve groove on its ink tank side being larger than a distance from the writing end to the ink introducing groove.
摘要:
A writing implement includes a cylindrical shaft member, a pen tip member which is fixed to one end of the shaft member and from which colored ink seeps out, liquid for ink which is stored in the shaft member and which comprises a major component of the colored ink seeping out from an end of the pen tip member, colorant to be added to the liquid for ink, and a valve member for isolating the colorant from the liquid for ink. In the writing implement, at least a part of a cylindrical side surface of the shaft member corresponding to a part where the liquid for ink is stored is formed to be transparent, the valve member is positioned between the storing part of the liquid for ink and the colorant, and the storing part of the liquid for ink is provided with a pressure-regulating part.
摘要:
A non-aqueous electrolyte solution containing a cyclic sulfone compound having a 1,3-dithietane-1,1,3,3-tetraoxide structure is provided. The cyclic sultone compound is preferably a compound represented by formula (I) [wherein in formula (I), R1 to R4 each represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, or the like].
摘要:
A copper alloy having excellent sliding performance is produced without relying on lead or molybdenum. The copper alloy contains a sintered Cu5FeS4 material produced by sintering a raw material powder that comprises Cu, Fe and S and is produced by a gas atomizing method.
摘要:
A bronze alloy includes copper, tin, bismuth, nickel and sulfur and a metal structure of the bronze alloy has an eutectoid phase including α-copper having a lamellar structure including a flaky copper-tin intermetallic compound precipitated and metal particles including the bismuth dispersedly precipitated therein.
摘要:
Disclosed is a lead-free copper alloy for casting which contains 0.1-0.7% of S, 8% or less (excluding 0%) of Sn, and 6% or less (excluding 0%) of Zn, and in which a sulfide is dispersed and the average spheroidization ratio of the sulfide is 0.7 or greater. Due to this constitution, said lead-free copper alloy for casting has excellent mechanical properties such as strength, high pressure resistance and good machinability and, therefore, is useful as a starting material for faucet metal fittings, water faucet and so on, even though the alloy contains no lead which causes deterioration of water.
摘要:
A writing lead (10) is grasped and released by reciprocation of a chuck (3) provided in a body cylinder (1) so as to inch the writing lead forward and a rotational drive mechanism is provided for rotationally driving a rotor (5) in one direction in conjunction with retreat operation by the writing pressure applied to the writing lead and forward movement by releasing the writing pressure. A pipe support member (8) for supporting a pipe end (7) is accommodated in a base (1A) which constitutes a front end portion of the body cylinder, and a retreat drive mechanism is provided for gradually retreating the pipe support member into the body cylinder in conjunction with rotational drive operation of the rotor. With the above-mentioned structure, a pipe-slide type mechanical pencil can maintain an amount of projection of the writing lead from the pipe end within a certain range.
摘要:
A method of producing a compound represented by the following general formula (3): [wherein R is a bivalent aliphatic group having a carbon number of 1-16 or a bivalent aromatic group], which comprises a step (i) of reacting a compound represented by the following general formula (1): with a carboxylic acid halide represented by the following general formula (2): [wherein R is a bivalent aliphatic group having a carbon number of 1-16 or a bivalent aromatic group and X is a halogen atom] in the presence of a basic compound to form an ester, and a step (ii) of conducting a heat treatment after the step (i) to decompose an oligomer in the ester.
摘要:
The present invention provides methods for the generation of viable reoviruses using only cloned nucleic acid segments representing the RNA segments of the reovirus genome.
摘要:
The present invention provides a vertical heat treatment boat that has at least four or more support portions per processing target substrate to be supported, the support portions horizontally supporting the processing target substrate, support auxiliary members on which the processing target substrate is mounted being detachably attached to the four or more support portions, respectively, wherein flatness obtained from all surfaces of the respective support auxiliary members on which the processing target substrate is mounted is adjusted by adjusting thicknesses of the support auxiliary members or interposing spacers between the support portions and the support auxiliary members in accordance with respective shapes of the four or more support portions. As a result, it is provided the vertical heat treatment boat and a heat treatment method for a semiconductor wafer that can readily improve flatness in support of the processing target substrate and effectively prevent occurrence of slip dislocation when performing a heat treatment to the processing target substrate such as a semiconductor wafer by using a vertical heat treatment furnace.