Abstract: An electromagnetic control valve is composed of a spool section for switching fluid passages on or off, a solenoid section for driving the spool in one direction, a magnetic moving core slidably disposed in the stator, a nonmagnetic shaft fixed to the moving core, and a spring member for biasing the spool in the direction opposite to the one direction. The spool section includes a spool and a sleeve. The solenoid section is connected to the spool section and includes a cylindrical magnetic stator, cylindrical magnetic yoke disposed to surround the stator and a magnetic coil disposed between the stator and the yoke. The stator is fixed to the sleeve at one end and having a bottom at the other end thereof. The shaft has one end to be in contact with the end of the sleeve thereby positioning the moving core in a longitudinal direction in the stator.

Abstract: The present invention provides an intake control valve which is able to reduce intake air leakage, control the amount of intake air with high accuracy, and to allow easy installation to an intake manifold. The intake control valve of an intake control device according to the present invention has a valve body, a case, and an actuator. The valve body is rotatably installed in the case, opening and closing an openingclosing passage formed in the case. The case is fitted with the actuator, which functions to rotate the valve body. In the meantime, the intake manifold is provided for a mounting bore formed for insertion of the case. On the outer side of the case are installed sealing members, which contact the wall surface of the mounting bore to prevent air leakage. The intake control valve is installed in the mounting bore formed in the intake manifold after assembling the valve body, the case and the actuator into one unit.

Abstract: A method of making a honeycomb die by using an electrode with parallel grooves in an electrical discharge machining process. The parallel grooves in the electrode are formed by a grinding wheel having a reverse tapered shape. The grinding wheel is progressively dressed during cutting of the parallel grooves.

Abstract: A ceramic honeycomb structural body having a plurality of through-holes surrounded by partition walls wherein, the partition wall thickness in at least a central portion of the structural body at a section perpendicular to the through-hole is thinned stepwise from a crossing segment of the partition wall up to a middle segment thereof.

Abstract: A high strength ceramic honeycomb structure includes a number of quadrilateral cells arranged adjacent to each other. Triangular cells are arranged in a zone in the proximity of an outer circumference of the honeycomb structure. Partitions of the triangular cells are oblique to partitions forming the quadrilateral cells and extending substantially toward a center of the honeycomb structure. The oblique partitions of the triangular cells serve to improve the isostatic strength of the honeycomb structure and to decrease the pressure losses.

Abstract: The apparatus is for changing the posture of green extruded bodies which have been shaped into predetermined configuration. The apparatus includes a rotatable first table for receiving and supporting the green extruded body in an extruded posture, a rotatable second table for receiving the extruded body in a standing posture from the first table, and a mechanism for rotating the first and second tables while maintaining them perpendicular to each other during the transfer operation.

Abstract: An extruding die structure is used for a plunger molding machine. The extruding die structure comprises an extruding die structure body detachably mounted on an extruding die mounting portion of the plunger molding machine and having an extruding die at its front end and grooves in an outer circumference for positioning and fixing the extruding die structure body to the extruding die mounting portion, keys engaging the grooves for positioning and fixing the extruding die structure body, and hydraulic cylinders as key driving means provided in the extruding die mounting portion for engaging and disengaging the keys from the grooves of the extruding die structure body. After the extruding die structure body is positioned by the positioning key, the fixing keys are engaged with the grooves to fix the extruding die structure body to the extruding die mounting portion, without requiring manual troublesome operation, shorten the time required for mounting the extruding die structure.

Abstract: A centering apparatus for ceramic articles or the like is disclosed, which articles are conveyed by a conveyor belt from one station to another. To facilitate further handlings of the articles, e.g. a clamping operation by a clamping device, the apparatus is arranged to align the articles into a proper orientation. The apparatus includes a first pair of centering members to center the article substantially transversely of the conveyor belt, and a second pair of centering members to center the article substantially longitudinally of the conveyor belt.

Abstract: An evacuating device for a plunger molding apparatus including a material cylinder for receiving a blank to be extruded, a ram head slidably engageable in the material cylinder, a hydraulic plunger having a piston connected to the ram head, an evacuating cap provided slidably in an air-tight manner on the piston and having evacuating pipes, and a blowdown valve provided in the ram head for closing and opening an air blow aperture formed in the ram head. The ram head has a flat surface which is in contact with the blank in the material cylinder. An O-ring is arranged in the flat surface of the ram head about the air blow aperture. The blowdown valve consists of a stem and a head which is brought into contact with the flat surface of the ram head through the O-ring when the ram head is being advanced, thereby improving the air-tightness between the ram head and the blowdown valve to prevent the ceramic batch from entering the air blow aperture.

Abstract: A cutting apparatus for ceramic green shaped bodies is disclosed, which comprises a cutting frame having two arm portions arranged side by side in the widthwise direction of the ceramic green shaped body. A cutting fine wire directly extends about the two arm portions through a roll arranged in each of the arm portions. The arm portions are moved toward a cutting direction of the ceramic green shaped body to move the cutting fine wire extended about the rolls into the ceramic green shaped body to cut it. The cutting fine wire is moved reciprocally during the moving of the cutting fine wire across the ceramic green shaped body, and while moving the arm portions toward the cutting direction of the ceramic green shaped body.

Abstract: A plunger molding machine includes a material cylinder having at one end an extending die for extruding a blank therethrough and pivotally movable about a pivotal axis on a side of the extending die by means of a cylinder tilting mechanism, a piston having a size engageable in the material cylinder, and a hydraulic plunger for driving the piston. The plunger molding machine comprises a blank loading device arranged in parallel with moving directions of the piston for molding. The blank loading device comprises a blank receiving platform for receiving the blank to be molded, a chuck mechanism for preventing the blank on the platform from being dislodged therefrom, a platform tilting mechanism for tilting the platform, and a platform traversing mechanism for moving the platform in translational motion onto a side of the material cylinder to bring an axis of said blank receiving platform into alignment with that of said material cylinder.

Abstract: An automatic cutting apparatus for extrusion molded bodies is disclosed, which comprises support base supply means for supplying support bases just beneath the extrusion molded body extruded from an extruder and transferring them onto a transporting passage, a speed sensor for detecting a moving speed of the body on the support bases, interval detecting means provided midway on the transporting passage for detecting a cutting interval for the body, and cutting means including a cutting tool arranged on the transporting passage upstream of the interval detecting means for cutting the body into a predetermined length perpendicularly to a moving direction of the body with the cutting tool being moved in the moving direction at a speed equal to that of the body detected by the speed sensor in response to a signal detected by the interval detecting means.

Abstract: A carrier for a flat photomask substrate having peripheral edges comprises a frame, a handle, a shaft, primary rings, and a spring. The frame has two ends, a periphery, and a shape with one side open. The handle has two ends and is journaled to one of the two ends of the frame. The shaft is provided through the one end of the frame and one end of the handle. This shaft allows the one end of the frame to pivot in a freely rotatable manner about the one end of the handle. The primary rings are arranged at the other end of the frame and at the one end of the handle. Such primary rings support the peripheral edges of the flat photomask substrate. The spring extends between the one end of the frame and the one end of the handle. This spring presses the primary rings into contact with the peripheral edges of the flat photomask substrate.

Abstract: A colored photomask has a glass substrate with a masking film deposited thereon formed of a non-stoichiometric chromium oxide composition produced by heating chromic oxide or metallic chromium in a clear oxidizing atmosphere of oxygen or an oxygen-nitrogen mixture at a total pressure of 0.5 .times. 10.sup.-.sup.4 to 5 .times. 10.sup.-.sup.4 Torr and at an oxygen pressure of 0.1 .times. 10.sup.-.sup.4 to 5 .times. 10.sup.-.sup.4 Torr to generate the vapor from the chromic oxide or metallic chromium, and depositing the rising vapor onto one surface of the glass substrate heated and positioned within the oxidizing atmosphere in a manner similar to a known vacuum-plating process, and at least one window in the masking film formed by etching the film.