摘要:
An image-forming machine equipped with a transfer device of the type not using a transfer corona discharger is disclosed. A charge supply member is disposed opposite to an image forming member on whose surface a toner image is to be formed, and at a greater distance than the thickness of a transfer material from the image forming member. A voltage of a predetermined polarity is applied to the charge supply member. In a transfer zone, the surface of the transfer material is brought into contact with the surface of the image forming member, while the back of the transfer material is not contacted with the surface of the charge supply member.
摘要:
A delay circuit for integrated circuits includes a current mirror circuit having at least a pair of MIS transistors, a constant current source and a capacitance. The delay time is determined by the charging time of the capacitance connected to one of the MIS transistors. A stable delay time is obtained regardless of manufacturing variations and the space required for the circuit is reduced.
摘要:
A denture-base made of a thermoplastic resin compound which comprises polysulfone resins (A) and a resin (B) selected from the group consisting of polycarbonates, polyester carbonates, aromatic polyester copolymers and their mixtures, is excellent in mechanical properties and compatibility with acrylic resins, firmly implants artificial dentures of acrylic resin, and is readily repaired by use of repair materials of acrylic resin.
摘要:
By the vapor phase reaction of benzene or a monoalkylbenzene with an alkylating agent in the presence of a specific catalyst obtained by subjecting a zeolite to a treatment with a gas containing a silicic acid ester and then a calcination in an oxygen-containing gas, said zeolite being 10 or more with respect to its molar ratio of SiO.sub.2 /X.sub.2 O.sub.3 in which X is at best one member selected from the group consisting of Al, B and Cr and having a constraint index within the range of 1 to 15, various useful 1,4-dialkylbenzenes can be produced not only in high yield but also in high selectivity.
摘要翻译:通过使苯或单烷基苯与烷基化剂在存在特定催化剂的情况下进行气相反应,所述催化剂通过使沸石进行含硅酸酯的气体处理,然后在含氧气体中进行煅烧而获得,所述沸石 相对于SiO 2 / X 2 O 3的摩尔比为10以上,其中,X为选自Al,B和Cr中的一种以上且约束指数为1〜15的范围,各种有用的1, 4-二烷基苯不仅可以高产率而且以高选择性产生。
摘要:
In the brazing of aluminum a flux composed of a mixture of alkali metal fluoaluminates, with or without admixed AlF.sub.3, is employed. The flux has a composition of AlF.sub.3 about 53-62%, KF about 35-44%, and LiF about 2-7%, in terms of simple compounds. The flux has a liquidus temperature in the range of 490.degree.-560.degree. C. depending on its actual composition. The flux is of particular utility when brazing aluminum containing 0.4-2% magnesium and/or having a low solidus temperature and is preferably employed in an atmosphere of a dry, inert gas.
摘要:
An apparatus for controlling the operation of an AC motor wherein braking energy at the time of a reduction in motor speed is disposed of by regenerative braking. The apparatus includes a rectifier connected to the AC power source, a smoothing capacitor, a variable-voltage variable-frequency inverter, and a regenerative thyristor bridge circuit connected between the inverter and the rectifier through switching transistors. There is also provided a firing control circuit for controlling the firing of each thyristor in the thyristor bridge circuit and for controlling driving of the switching transistors in synchronism with the firing of the thyristors, the braking energy being fed back to the AC power source when the AC motor undergoes a reduction in speed. The apparatus is small and can be constructed simply and inexpensively.
摘要:
The invention relates to a speed control system which includes an inverter circuit for converting a direct current into a polyphase alternating current in the form of a rectangular wave by the switching action of transistors, and an inverter drive circuit adapted to apply control signals to the inverter circuit to bring its output frequency to a desired value, an AC motor being rotated by the alternating current supplied by the inverter circuit. The system features current detection means for detecting the current that flows thrugh the input side of the inverter circuit, and a circuit adapted to terminate the operation of the inverter circuit when the value detected by the current means approaches a value large enough to damage the inverter circuit transistors as at such time that a large momentary current is subjected thereto. Also provided is protective circuitry with a current-limiting function adapted to suppress an increase in the output current of the inverter circuit and limit this current to a stable value without terminating the operation of the inverter circuit at such time that the current continuously flowing into the transistors of the inverter circuit is about to flow to its output side at an increased magnitude that could damage the transistors.
摘要:
A polyester resin composition having excellent mechanical properties, processability, transparency and surface glossiness of the formed product thereof, which comprises 1 to 99% by weight of an aromatic polyester produced by polycondensing para-hydroxybenzoic acid or a functional derivative thereof (I), 2,2-bis(4'-hydroxyphenyl)propane or a functional derivative thereof (II), and terephthalic acid or a functional derivative thereof (III) and/or isophthalic acid or a functional derivative thereof (IV) in a molar ratio of (I):(II)=1:100 to 100:1 and (II):(III) and/or (IV)=1:10 to 10:1 and 99 to 1% by weight of a polycarbonate or an aliphatic polyester.
摘要:
A liquid crystal display device includes a liquid crystal (LC) panel; front and rear frames sandwiching therebetween the LC panel; a latch structure engaging together the LC panel and one of the front and rear frames. The latch structure includes a convex portion formed on one of the LC panel and the one of the front and rear panels and a concave portion formed on the other of the LC panel and the one of the front and rear frames to receive therein the convex portion, whereby the latch structure allows and restricts movement of the LC panel with respect to the one of the front and rear frames in a first direction normal to the LC panel and in a second direction parallel to the LC panel, respectively.
摘要:
A communication control system capable of reducing the traffic amount, CPU's processing load and channel bands related to a location registering process. In this system, a paging part (303) of a base station apparatus (300) receives a call request message transmitted from an access gateway apparatus (200) and addressed to a wireless terminal apparatus, and generates a call response message indicative of accommodating the wireless terminal apparatus. An MIP location registering part (304) registers an IP address established at the transmitting source of the call request message, and generates a location registration request message that requests a registration of an IP address established at the local base station. A packet combining part (305) generates and transmits a combined packet, which is obtained by combining the call request message with the location registration request message, to the access gateway apparatus (200).