Abstract: This invention relates to an electrophotographic copying and printing apparatus having copying function and printing function.

Abstract: The heat generating member in a ceramic glow plug is a coil embedded in the ceramic. The coil is wound to have a coil angle, i.e. an angle formed between the coil and a line parallel to the coil axis, of no more than 60.degree.. The ceramic may be a non-oxide ceramic, nitride ceramic, SiC ceramic, or the like.

Abstract: Disclosed is a ceramic body for chromatography, which consists of a calcined molded body of alumina particles composed mainly of .alpha.-alumina, preferably containing a minor amount of .gamma.-alumina, and which has a narrow pore size distribution range.This ceramic body has no substantial adsorbing property and therefore, when it is used for use like to thin layer chromatography or gas chromatography, the tailing phenomenon is not caused to occur at all and a high separating capacity can be obtained stably.

Abstract: Tool for making separated tooth model comprising a tray having a plurality of holes each made vertically in the surface thereof, and plural pins each capable of being engaged with the holes so that head portions of the pins are positioned above the surface of the tray.

Abstract: A hydrogen containing amorphous silicon photoconductive layer exhibits infrared absorption peaks between wavenumber of 2000 cm.sup.-1 where Si-H bonds are predominant and wavenumber of 2090 cm.sup.-1 where Si-H.sub.2 bonds are predominant and has an absorption coefficient ratio of the peaks of 2090 cm.sup.-1 to 2000 cm.sup.-1 of about 0.2 to 1.7. Preferably, the photoconductive layer is formed by a glow discharge decomposition and may contain small amount of oxygen and 10 to 20,000 ppm of Group IIIA impurity of the Periodic Table.

Abstract: In a glow plug, a pair of ceramic rods having longitudinal bonding surfaces are used as a heating rod. A resistor including a heater, and a pair of lead portions connected to both ends of the heater and extending to rear ends of the ceramic rods is continuously disposed on one bonding surface of the ceramic rods. One of the lead portions extends through a hollow metal holder, while the other lead portion is connected to an external connecting terminal mounted through an insulating member.

Abstract: A cantilever for use in supporting a stylus tip of a phonograph pickup is disclosed, which consists of a pipe of a ceramic material composed mainly of aluminum oxide. This cantilever is light weight and has a high Young's modulus. When this cantilever is attached to a phonograph pickup, reproduction loss can be remarkably reduced over all the reproduction frequency range and sounds can be reproduced having good response characteristics.

Abstract: A semiconductor integrated circuit supporter on which a heating element is dielectrically provided, said supporter comprising a package, printed circuit board, mother board, etc. for supporting a semiconductor integrated circuit which includes devices such as transistors.The heating element provided on said semiconductor integrated circuit supporter is capable of heating the whole or a required part only thereof so that the semiconductor integrated circuit is preheated to a temperature required for its normal operation with precision and stability thereby improving the accuracy and reliability of various devices of which a semiconductor integrated circuit is composed as well as the control by said devices.

Abstract: Disclosed is a carrier for administration of medicines, which consists of a granular shaped article of a porous ceramic material having communicating fine pores. Pores of this carrier are impregnated with a medicine, or a capsule is formed from this carrier and the inner space of the carrier is filled with a medicine. In the resulting impregnated carrier or filled capsule, a desirable property of gradually releasing the medicine is obtained and a good durability of the effect of the medicine can be attained.

Abstract: This disclosure relates to an endosseous implant for use in dental and orthopedic treatment. The implant is a composite structure made of a combination of an outer ceramic member and an inner ceramic core member bonded together by glass cement. After being implanted, new bone tissue and new connective tissue penetrate into the outer member to form a net-like root structure therein, thereby increasing the stability of the implant and at the same time the outer member is reinforced by the inner core member.

Abstract: Disclosed is a synthetic single crystal for an alexandrite gem, which consists essentially of a synthetic chrysoberyl single crystal comprising aluminum oxide and beryllium oxide as the main components and chromium and vanadium as the coloring components, wherein vanadium is contained in an amount of about 0.00075 to about 2.95% by weight based on the crystal.This single crystal shows a green or bluish green color under natural light and the color is changed to red or reddish violet when the single crystal is exposed to tungsten light the single crystal of the present invention is comparable or superior to natural alexandrite produced in the Ural Mountain Region with respect to the hue and color change characteristics.

Abstract: A package for sealing an MOS type semiconductor element having a die-attach area comprising a first metal layer composed of gold and a second metal layer composed of a metal having a good bondability to aluminum metal, which is electrically connected to the first metal layer.

Abstract: An extrusion die for forming thin-walled honeycomb structures is provided comprising a plurality of discharge slots for forming unit cells of a predetermined web thickness formed transversely in the die to a predetermined depth in the outlet face and a plurality of mutually independent feed passageways formed transversely in the die extending from the inlet face of the die and communicating with the discharge slots. The cross-sectional area of the feed passageways is larger than the cross-sectional area of the discharge slots which are fed by the feed passageway, thereby applying sufficient flow resistance to the extrudable material and the discharge slot.

Abstract: This invention is directed to a burnt ceramics composition of matter for an endosseous implant to be inserted in the bone tissue of a living body. The composition of matter consists of 95-50% of Al.sub.2 O.sub.3 and 5-50% of more than one compound selected from the group consisting of ZrO.sub.2, La.sub.2 O.sub.3 and Y.sub.2 O.sub.3.

Abstract: A process for synthesizing single crystalline beryl out of a molten salt is disclosed. The process comprises the steps of providing at least one flux to which is added the component oxides of beryl and optionally a colorant. The mixture thus obtained is heated at a temperature higher than the melting point of the flux to thereby form a molten salt. After the formation of the molten salt, the salt is cooled below the temperature sphere of beryl formation and is thereafter reheatd and again melted. At this point beryl crystals are added to the molten salt which thereby form single crystalline beryl from the molten salt. By the use of the process of the present invention, superior quality single crystalline beryl is produced economically and at a high yield rate.

Abstract: The disclosure relates to a ceramic heating device in the form of a cylindrical shape comprising a burnt cylindrical support core of heat-resistant ceramics, a ceramic element disposed around said support core, said element comprising (i) a burnt sheet of heat-resistant ceramics; (ii) a heat-generating resistor pattern, said pattern being hermetically sealed between said sheet; and (iii) a pair of exposed terminals provided onto said sheet and said core, said terminal being connected to said pattern and adapted to be coupled to power leads such that electric power is then applied to said pattern.

Abstract: A magnetic memory structure which may be used as a disc memory, a drum memory or a similar component including a ceramic substrate having a thin film of magnetic ferrite material thereon, said film being of a cobalt-based spinel type ferrite and a method for manufacturing the same.

Abstract: This invention is directed to a device for implanting an artificial endosseous element of ceramics in the fields of dentistry, oral surgery and orthopedics, comprising an implant screw pin and more than one nut element in combination with said screw pin primarily for securely holding said screw pin in a bone structure after implantation thereof. This invention is also directed to an implant method for use of such device.

Abstract: This invention relates to a golf club head capable of increasing the flying distance of the ball hit in a substantial degree, imparting a refreshing feeling of ball hitting to the player and being manufactured at low cost and durable for long time use by fixing the striking face of the club head with a ceramic face plate made of a sintered body of metallic oxides such as alumina ceramics, mullite ceramics, etc.