Abstract: The ink composition of the present invention contains a coloring agent, water, a water-soluble organic solvent which is a liquid at least at temperatures of 40° C. or less, and which has a solubility of 1 wt % or greater with respect to water at a temperature of 20° C., and a saturation vapor pressure of 1.7 Pa or less at a temperature of 20° C. (with said organic solvent being contained in the ink composition at the rate of 10 to 35 wt %), and one or more amidine type compounds. As a result, the present invention provides an ink composition, a recording medium, recorded matter and an ink jet recording method that make it possible to obtain images with a high image quality which are superior in terms of the gas resistance of the recorded matter.

Abstract: Disclosed is a cationic water-soluble resin which comprises a (co)polymer of, in formula (I), repeating units (a) represented by formula (a) and repeating units (b) represented by formula (b), the content of the repeating units (a) in the (co)polymer being 100 to 0% by mole, the (co)polymer having in its molecule a carboxyl-containing group as one of the terminal groups and an aromatic ring-containing group as the other terminal group. The addition of this resin to ink compositions can realize the formation of images possessing excellent waterfastness and lightfastness and having no significant feathering or color bleeding. Likewise, the addition of this resin to a reaction solution for ink jet recording involving the deposition of two liquids, an ink composition and a reaction solution, onto a recording medium, can realize the formation of images possessing excellent waterfastness and lightfastness and no significant feathering or color bleeding.

Abstract: An ink composition and/or a recording medium are made to contain a compound expressed by general formula (1) and a hydrazide compound. An ink composition thereby obtained does not clog and the ink composition and recording medium thus obtained can offer high quality images that hardly cause yellowing of the resulting recording with superior light resistance. Recording and an inkjet recording method pertaining thereto are also provided.

Abstract: An ink composition for ink jet recording is provided which can realize both good waterfastness of prints and high-quality recorded images on specialty recording media. The ink composition comprises a water-soluble colorant, such as an acid dye, a cationic water-soluble polymer, such as polyallylamine, and an inorganic salt, such as potassium chloride, in combination.

Abstract: Disclosed is an ink composition which has good storage stability and, in addition, can yield prints having good waterfastness and lightfastness.

Abstract: The present invention relates to processes for industrially advantageously producing, in high yields, an N,N-dialkylallylamine polymer or an addition salt thereof, a copolymer of N,N-dialkylallylamine and monoallylamine or an addition salt thereof, and a copolymer of N,N-dialkylallylamine and diallylamine or an addition salt thereof, which are useful for various uses in the field of fine chemicals and particularly useful as a water-resistance-imparting agent for an inkjet ink.

Abstract: An aqueous ink comprising at least a colorant, a water-soluble organic solvent and a compound represented by general formula (I) shown below, wherein said water-soluble organic solvent stays liquid at a temperature of not higher than 40° C., exhibits a water solubility of not lower than 1% by weight at a temperature of 20° C. and a saturated vapor pressure of not higher than 1.7 Pa at a temperature of 20° C.

Abstract: A weight member is attached to a rotor so as to forcibly offset a center of gravity of a rotor from a rotating axis, centrifugal force moves two movable weight members to appropriate positions for canceling the unbalance due to the center of gravity offset from the rotating axis, and stoppers restrict the movement of the two movable weight members in a sectoral area opposite to the center of gravity so that the rotor is free from vibrations due to the characteristic angular velocity.

Abstract: A composition, for ink jet recording, containing a cationic, water-soluble resin comprising a repeating unit represented by the following formula (I) can realize an image possessing excellent waterproofness and lightfastness and having no significant feathering or bleeding, especially no significant color-to-color bleeding: 1

Abstract: A weight member is attaclhed to a rotor so as to forcibly offset a center of gravity of a rotor from a rotating axis, centrifugal force moves two movable weight members to appropriate positions for canceling the unbalance due to the center of gravity offset from the rotating axis, and stoppers restrict the movement of the two movable weight members in a sectoral area opposite to the center of gravity so that the rotor is free from vibrations due to the characteristic angular velocity.

Abstract: An ink set is disclosed which comprises at least a black ink, a yellow ink, a magenta ink, and a cyan ink, each of the inks comprising at least a colorant, a water-soluble cationic polymer having a primary amino group in its molecule, and water, the colorant consisting of a coloring material(s) classified into categories of anthraquinone, indigoid, phthalocyanine, carbonium, quinoneimine, methine, quinoline, nitro, nitroso, benzoqulnone, naphthoquinone, naphthalimide, and perinone coloring materials. This ink set can realize a full-color image having both good waterfastness and lightfastness. The coloring materials falling within the above categories, even when added, to the ink, in combination with a highly reactive polyallylamine having a primary amino group, can realize an image having good lightfastness while maintaining high waterfastness derived from the addition of the polyallylamine.

Abstract: Addition of a compound, selected from the group consisting of water-soluble hydroxypyridine derivatives, chain or cyclic amide compounds, imidazole derivatives, hydroxycyclic amine compounds, azole compounds, azine compounds, amidine derivatives, and purine derivatives, as a clogging preventive to an ink composition containing a cationic, water-soluble polymer enables the ink composition to yield an image having good waterfastness and to be less likely to cause nozzle clogging.

Abstract: Disclosed are a metal processing lubricating oil composition and a process for producing the same. A metal processing lubricating oil composition according to this invention comprises mineral oil, synthetic oil or a mixture thereof, and phosphoric ester and orthophosphoric acid mixed and heated in the mineral oil, synthetic oil or mixture thereof. The lubricating oil composition gets rid of the tiresome pre-treatment associated with the conventional lubricating method, and exhibits a high seizure prevention performance in cold plastic working only by coating it on workpieces. The lubricating oil composition may further comprise metallic phosphate to suppress corrosivity against ferrous materials.

Abstract: A dash pot device for application to a deceleration control system for delaying a return action to the engine idle speed position of a carburetor throttle valve for automobile engines. The device includes a body member having a partition wall dividing an interior of the body member into a diaphragm chamber and an air chamber, a diaphragm disposed within the diaphragm chamber, an air filter positioned within the air chamber, a shaft fastened to the diaphragm, a pinhole type orifice passage installed in the partition wall, and a check valve located in the partition wall and oriented parallel to the orifice passage.

Abstract: An air suction device for a diesel engine having a throttle valve disposed within an air suction passage wherein the throttle valve has an opening through which air may pass even when the throttle valve is in a closed position and wherein a mechanism is positioned adjacent that hole to selectively control the amount of air passing through that hole when the throttle valve is in a closed position.

Abstract: A vacuum control valve includes a body having a vacuum inlet port, a vacuum outlet port and an atmospheric inlet port formed therein, a movable diaphragm type mechanism positioned within the body to define a vacuum chamber and an atmospheric chamber within the body wherein the vacuum chamber is in communication with the vacuum outlet port and the atmospheric chamber is in communication with the atmospheric inlet port and wherein the movable mechanism is movable in response to change in vacuum pressure within the vacuum chamber, a spring mechanism normally biasing the movable mechanism in a first position, a valve mechanism movable in association with the movable mechanism to thereby control fluid communication between the vacuum inlet port and the vacuum chamber, and between the atmospheric inlet port and the vacuum chamber and a regulating mechanism which further includes a cam mechanism rotatably mounted within the body and operatively associated with the spring mechanism wherein the cam mechanism is rotate

Abstract: The signal generating device provides both an electrical signal as well as a vacuum signal in response to the degree of opening of a throttle valve in a single body which has a vacuum inlet port and a vacuum outlet port as well as a atmospheric inlet port and which includes a movable diaphragm positioned within the body to define a vacuum chamber in communication with the vacuum outlet port and an atmospheric chamber in communication with the atmospheric inlet port with the movable diaphragm being responsive to the vacuum pressure within the vacuum chamber. The movable diaphragm is controlled by biasing springs and a valve member is associated with a diaphragm to control fluid communications between the vacuum inlet port and the vacuum chamber as well as fluid communication between the vacuum chamber and the atmospheric chamber.

Abstract: A pneumatically operated device responsive to a signal pressure applied thereto from a source of negative pressure for controlling the atmospheric air applied to a control device and for controlling an electric signal applied to an electric control circuit. The pneumatically operated device includes a diaphragm assembly assembled within a housing to subdivide the interior of the housing into first and second chambers respectively in open communication with the negative pressure source and the atmospheric air, and valve and switch mechanisms arranged within the housing to be operated in response to movement of the diaphragm assembly caused by the pressure difference between the first and second chambers.

Abstract: In an exhaust gas cleaning system for an internal combustion engine in which additional air is injected from outside into an engine exhaust manifold by an on-off-duty solenoid valve under control of a microcomputer operating on the partial oxygen pressure in the exhaust gas as detected by an oxygen sensing element, the engine r.p.m. and the exhaust gas temperature, a vacuum control valve adapted to add vacuum signals responsive to variations in the intake manifold vacuum of the engine and throttle opening to the output vacuum signals of the solenoid valve commanding the air injection.

Abstract: A fluid control system for cleaning exhaust gases of an internal combustion engine by injecting additional air into the exhaust manifold of the downstream of the combustion chamber of the engine according to the engine operating conditions. This system includes a vacuum control valve which supplies vacuum on-off signals to a flow control valve device which meters injecting of additional air.