Abstract: A packet communication apparatus comprising a node management processor for controlling the whole apparatus, network interfaces for transmitting and receiving packets to and from external networks, function enhancement modules for performing predetermined processes on the packets, and a switch for transferring the packets within the apparatus. The network interface includes a CPU and a memory, the memory stores a program executed by the CPU, the CPU processes the packet received from the external networks by executing the program, and the function enhancement module stores the program stored in the memory.

Abstract: A two-sided copying apparatus includes: an image forming device for forming an image on a recording sheet; a fixing device for fixing the image on the recording sheet; a branching device for branching the recording sheet on which the image was fixed by the fixing device to eject outside the apparatus or to feed again inside the apparatus for a two-sided image formation; a plurality of holding devices each for holding one edge of the recording sheet fed again inside the apparatus, wherein the holding device temporarily stops while holding the recording sheet and feeds again in a reverse direction onto a transfer station; and a supporting and guiding device for supporting and guiding the plurality of the holding devices.

Abstract: A portable biochemical measurement device including a measurement main body containing an enzyme sensor holder for an enzyme sensor. A cover, mounted on the measurement main body, covers the enzyme sensor holder. The cover contains a chamber filled with a liquid medium to maintain the moisture of the enzyme sensor. Inside the cover are a cartridge and packing, which form the chamber containing the liquid medium. The enzyme sensor holder is inserted into the cover through the packing so that the enzyme sensor is immersed in the liquid medium thereby keeping the enzyme sensor moist.

Abstract: Compositions for low heat cements developed especially for massive concrete works and which exhibit a compressive strength/heat of hydration ratio of at least 7.0 at the age of 13 weeks. One of two inventions provides a powder prepared by mixing CaO, SiO.sub.2, and Al.sub.2 O.sub.3 materials, melting the mixture, quenching the melt, and grinding the quenched matter, the powder being composed mainly of amorphous substances and chemically having a CaO/SiO.sub.2 (molar ratio) of 0.8-1.5 and an Al.sub.2 O.sub.3 content of no more than 10 wt. %. The other invention provides a mixed powder comprising no less than 70 wt. % of a powder and no more than 30 wt. % of an addition (portland cement or the like), the powder being the same as that of the first invention in both predominance of amorphous substances and CaO/SiO.sub.2 (molar ratio) excepting the Al.sub.2 O.sub.3 content which is less than 12 wt. % in the second invention.

Abstract: An apparatus for forming an image of a document on a photoreceptor includes a charging device for charging the photoreceptor so as to form an image region, an eliminating device for eliminating a charge on the photoreceptor to form a non-image region, and a scanner for moving from a stop position to scan a document with an exposure light so that a latent image, corresponding to an image of the document, is formed on the image region of the photoreceptor. The scanner also moves backward and stops at the stop position. A position signal corresponding to a predetermined position of the scanner is generated by a signal device. A timer starts counting a time responsive to the position signal. The timer produces a first and second timing signal after the scanner stops at the stop position.

Abstract: A device for detecting the presence or absence of an original and size thereof and corresponding method therefore. The device is provided on an image forming apparatus, and provides accurate detection of an original and an original's size in the presence of external light. External light is detected during the non-emission state of a light emitting element and used to correct a reference value. The corrected reference value is then compared to a detected value of light emitted from the light emitting element and reflecting from an original, if one is present. Based on the comparison a determination is made as to the presence of an original. When an original is present the light emitting element traverses across the glass contact plate of the image forming apparatus on which the original is placed. Upon the determination of an absence of the original, the light emitting element halts its movement. The distance travelled by the light emitting element is then used to determine the size of the original.

Abstract: An image processing apparatus includes a photoelectric converter, a multiple-value circuit, and a detachable external storage unit. The photoelectric converter photoelectrically coverts data of an original into image signals. The multiple-value circuit converts the image signals into multiple-valued data by comparing the image signals with predetermined threshold value data. The detachable external storage stores the threshold value data. The threshold values can also be made automatically responsive to gray scale data. The automatic mode and the manual selection mode are switched between in response to a release (toggle) signal. Color separation and color ghost correction are provided; and various types of formatting management are faciliated. Partial color converting (as, for example, color reversal) is also provided.

Abstract: An apparatus for the formation of images comprising a transfer unit for transferring a toner image formed on a photosensitive drum onto a sheet of copy paper, a conveying unit for conveying the copy sheet in a given direction, and a shield for dividing the region below the conveying unit and transfer unit into the upper and lower portions and for shielding the photosensitive drum in the upper portion from the flow of air from the lower portion, thereby providing high quality images.

Abstract: A polycarbonate composition comprising (A) 100 parts by weight of a polycarbonate resin and (B) 1 to 80 parts by weight of an isoprene-base graft copolymer, wherein; said isoprene-base graft copolymer (B) is prepared by polymerizing(a) 20 to 100 parts by weight of one or more vinyl monomers selected from the group consisting of acrylic esters, methacrylic esters, aromatic monovinyl compounds, and cyanovinyl compounds, and(b) 0 to 5 parts by weight of a polyfunctional vinyl monomer in the presence of(c) 100 parts by weight of a copolymer having an isoprene content of 5 to 100% by weight and an acrylic ester content of 0 to 95% by weighthas excellent thermal stability, low temperature impact resistance, jet-black colorability, and solvent resistance. Such a polycarbonate composition is suitable as a material for moldings in the fields of automobiles, home electric appliances, etc.

Abstract: A polycarbonate resin composition which comprises(i) bisphenol type aromatic polycarbonate, in admixture with(ii) 5 to 200 parts by weight of a polyester type copolymer, per 100 parts by weight of said bisphenol type aromatic polycarbonate, which is produced by adding(a) 5 to 100 parts by weight of bisphenol type aromatic polycarbonate having a viscosity-average molecular weight of not less than 5,000,to (b) 100 parts by weight of a polyester precursor having a number-average polymerization degree of 1 to 30 which is obtained from bifunctional carboxylic acid mainly composed of terephthalic acid or a derivative thereof having an ester forming ability and a diol component, and effecting polycondensation,which provides an improved fluidity and solvent cracking resistance without remarkably decreasing of the original impact resistance and transparency of polycarbonate, to eliminate the defects of polycarbonate.

Abstract: Polycarbonate resin compositions are disclosed, comprising: (1) (A) a polycarbonate resin and (B) polyesterether elastomer, said elastomer composing of a bifunctional carboxylic acid component and a glycol component comprising polyalkylene glycol and ethylene glycol, or (2) the components (A) and (B), and (C) a rubber-like elastomer, or (3) the components (A) and (B), and (D) a polyester resin, or (4) the components (A), (B), (C) and (D). These compositions are excellent in solvent resistance and so forth, and further possess excellent physical and thermal properties characteristic of a polycarbonate resin. Thus the compositions are useful for use in production of industrial and electrical articles, such as a car bumper in the field of car industry.