Abstract: The sheet for suction and fixation according to the invention is a sheet for suction and fixation, constituted by including at least a porous sheet and used for suction and fixation of a member to be sucked, and the sheet for suction and fixation has a structure of a plurality of layers comprising a porous sheet provided on at least one side of the porous sheet with a particle layer constituted by including plastic particles, wherein the surface roughness (Ra) of the particle layer is not greater than 0.5 ?m. A sheet for suction and fixation, which is continuous and long and excellent in surface smoothness, and a method of producing the same, can thereby be provided.

Abstract: The present invention provides: a protection member used for preventing a contact between a lens for focusing light on an optical information recording medium and the optical information recording medium upon optically recording or reproducing information on or from the optical information recording medium, the protection member including an ultrahigh molecular weight polyethylene porous film; and an optical pickup device having the protection member.

Abstract: A network connection device for performing a process of transmitting and receiving a SONET/SDH frame includes a first protocol processor which processes a first network management protocol; a second protocol processor which processes a second network management protocol; a frame header extractor which extracts a header from the received SONET/SDH frame; and a protocol identifier which identifies a network management protocol based on the extracted frame header. The network connection device selects one of a control signal outputted from the first protocol processor and a control signal outputted from the second protocol processor based on a result of the identification, and outputs the control signal.

Abstract: The sheet for suction and fixation according to the invention is a sheet for suction and fixation, constituted by including at least a porous sheet and used for suction and fixation of a member to be sucked, and the sheet for suction and fixation has a structure of a plurality of layers comprising a porous sheet provided on at least one side of the porous sheet with a particle layer constituted by including plastic particles, wherein the surface roughness (Ra) of the particle layer is not greater than 0.5 ?m. A sheet for suction and fixation, which is continuous and long and excellent in surface smoothness, and a method of producing the same, can thereby be provided.

Abstract: A method of manufacturing a polarizing plate in which an original polarizing plate is cut accurately, cracks are not extended easily in a section and foreign substances are not attached easily on a polarizing plate to be obtained, and a cutting mat to be used in the method are provided. An original polarizing plate having a plurality of layers is fixed on a first principal surface of an ultrahigh molecular weight polyethylene porous sheet by drawing from the opposite side. The original polarizing plate is cut by a blade moving across the thickness of the original polarizing plate by using the porous sheet as a cutting mat to obtain a polarizing plate having a plurality of layers. A curable liquid, such as ultraviolet curable ink, is impregnated in vacant pores of the porous sheet, and is cured to obtain a sheet. The sheet thus obtained is particularly suitable for a cutting mat.

Abstract: Two multiplexing/demultiplexing sections of working and protection sides are prepared for each of a plurality of optical transmission devices which constitute a system, and the optical transmission devices are synchronized with each other to execute switching between the working and protection sides so that one of the working and protection sides can be selected for the entire system. Each expansion device collects optical line trouble information for each of the working and protection sides, and transmits to a main device. The main device integrates the information with trouble information transmitted from expansion devices per expansion device. The main device converts the integrated trouble information into point information, totals for each of the working and protection sides, compares, and decides which of the working and protection sides is to be selected.

Abstract: The present invention provides: a protection member used for preventing a contact between a lens for focusing light on an optical information recording medium and the optical information recording medium upon optically recording or reproducing information on or from the optical information recording medium, the protection member including an ultrahigh molecular weight polyethylene porous film; and an optical pickup device having the protection member.

Abstract: An elastic pressure sheet that is good in durability against liquid crystals and the like and is good in slipperiness and a process of manufacturing a liquid crystal display plate using the same are disclosed. The elastic pressure sheet comprises an elastic layer having elastic restoring force; hot-melt adhesive layers formed on the both surfaces of the elastic layer; a barrier layer formed on the outer surface of each of the adhesive layers and capable of preventing bleeding of the hot-melt adhesive layer; and a porous layer comprising ultrahigh molecular weight polyethylene, formed on the outer surface of each of the barrier layers.

Abstract: Two multiplexing/demultiplexing sections of working and protection sides are prepared for each of a plurality of optical transmission devices which constitute a system, and the optical transmission devices are synchronized with each other to execute switching between the working and protection sides so that one of the working and protection sides can be selected for the entire system. Each expansion device collects optical line trouble information for each of the working and protection sides, and transmits to a main device. The main device integrates the information with trouble information transmitted from expansion devices per expansion device. The main device converts the integrated trouble information into point information, totals for each of the working and protection sides, compares, and decides which of the working and protection sides is to be selected.

Abstract: An optical transmission technique for a ring transmission system that can transmit time-division-multiplexed optical signals in dual directions. An optical transmitting apparatus comprises a data link reading section, a topology creating section, a data link writing section, a squelch table creating section, a squelch table, an RIP table creating section, an RIP table, a node recognizing section, an east-side receiving unit, an east-side transmitting unit, a west-side transmitting unit, and a west-side receiving unit. When a transmission route is switched at plural positions, the squelch table and the RIP table are automatically created as soon as a crossconnect is set. With minimum setting, the ring transmission system can be normally operated without increasing the number of setting items, the squelch table can be created at a high speed using existing hardware, and an alarm can be automatically transmitted from a secondary node until each table is created.

Abstract: A switching method in a bidirectional line switched ring includes the steps of performing span switch by one node of the ring for getting rid of a fault detected by the one node, changing the span switch into ring switch when the span switch could not be performed normally, and performing the ring switch, and holding the ring switch request as an internal request of the one node when a span switch request, higher in priority than the ring switch, generated in another node is received by the one node.

Abstract: An elastic pressure sheet that is good in durability against liquid crystals and the like and is good in slipperiness and a process of manufacturing a liquid crystal display plate using the same are disclosed. The elastic pressure sheet comprises an elastic layer having elastic restoring force; hot-melt adhesive layers formed on the both surfaces of the elastic layer; a barrier layer formed on the outer surface of each of the adhesive layers and capable of preventing bleeding of the hot-melt adhesive layer; and a porous layer comprising ultrahigh molecular weight polyethylene, formed on the outer surface of each of the barrier layers.

Abstract: A ring configuring method configures a network in which a plurality of nodes are connected linearly, and performs topology construction for the ring by circulating topology data through the respective nodes and collecting connection information of the respective nodes. The method includes the steps of providing in the topology data a flag indicating whether the connection information is collected in each node; inverting the flag at a terminal station which is an end node of the open ring, and turning the topology data there; causing the topology data to passing through a node other than any terminal station as it is; and adding the connection information to the topology data in each node according to the flag, and performing topology construction.

Abstract: A cutter head assembly including: (a) a main body which has a cutting-blade receiving bore and a clamping-member receiving bore partially interfering with the cutting-blade receiving bore; (b) a cutting blade received in the cutting-blade receiving bore and having a flat surface as a part of an outer circumferential surface thereof and parallel to an axis of the cutting blade; and (c) a cylindrical clamping member received in the clamping-member receiving bore and having a fitting portion and a cam portion. The cylindrical clamping member is fitted at the fitting portion in the clamping-member receiving bore. The cam portion has a cam surface whose radial distance from an axis of the fitting portion changes in a circumferential direction of the cylindrical clamping member.

Abstract: A cutter head assembly including: (a) a main body which has a cutting-blade receiving bore and a clamping-member receiving bore partially interfering with the cutting-blade receiving bore; (b) a cutting blade received in the cutting-blade receiving bore and having a flat surface as a part of an outer circumferential surface thereof and parallel to an axis of the cutting blade; and (c) a cylindrical clamping member received in the clamping-member receiving bore and having a fitting portion and a cam portion. The cylindrical clamping member is fitted at the fitting portion in the clamping-member receiving bore. The cam portion has a cam surface whose radial distance from an axis of the fitting portion changes in a circumferential direction of the cylindrical clamping member.

Abstract: A ring configuring method configures a network in which a plurality of nodes are connected linearly, and performs topology construction for the ring by circulating topology data through the respective nodes and collecting connection information of the respective nodes. The method includes the steps of providing in the topology data a flag indicating whether the connection information is collected in each node; inverting the flag at a terminal station which is an end node of the open ring, and turning the topology data there; causing the topology data to passing through a node other than any terminal station as it is; and adding the connection information to the topology data in each node according to the flag, and performing topology construction.

Abstract: A method of renting fabric articles comprising sticking a bar code-printed sheet onto the fabric articles and repeatedly renting and washing the fabric articles under the management with the use of the bar codes, by which the bar codes can be read even after washing the fabric articles 100 times and thus the rental business can be smoothly performed. The method of renting fabric articles comprises sticking a data code-printed sheet onto the fabric articles and repeatedly renting and washing the fabric articles under the management with the use of the data codes, characterized in that the data code-printed sheets are those wherein the data code (2) is printed on an ink-receiver layer (1) which is a porous layer made of an ultra-high-molecular-weight polyethylene having a viscosity-average molecular weight of from 500,000 to 10,000,000 and having an average surface roughness Ra of 5 .mu.m or less and a degree of shrinkage under contact with air or in an aqueous alkali solution of pH 10 to 11 of 5% or less.

Abstract: A transmission apparatus has units to which main signals are input for subjecting these main signals to predetermined processing and then transmitting them. One of these units is a master unit and the others are slave units and they are interconnected by a clock cable and processor-to-processor cable. Each slave unit detects a synchronization status message that has been inserted into a main signal input from a line and notifies the main unit of this synchronization status message via the processor-to-processor cable. Using synchronization status messages acquired from the slave units and a synchronization status message that has been inserted into a main signal input thereto, the main unit obtains the synchronization status message indicative of the best quality level and adopts, as a master clock, a clock extracted from the main signal into which this synchronization status message has been inserted.

Abstract: Disclosed is an optical transmission system for transmitting data via an optical transmission line in accordance with a frame format having overhead which includes a K1 byte used for a switching request and a K2 byte used to respond to the K1 byte.

Abstract: A communication port control system which controls the use of communication ports for making a communication between a main station and a plurality of sub stations, and includes a processing unit for processing data received from the sub stations, and a logical sum unit for obtaining a logical sum of the data received from the sub stations and for supplying the logical sum to the processing unit via the communication ports. A judging unit is provided in the control system for judging a sub station number of the sub station from which the data received by the logical sum unit originates and for supplying the sub station number to the processing unit. The logical sum unit receives the data from only one of the sub stations at one time.