Abstract: An injection molding of a synthetic resin having a foamed injection pressure transmission material remaining in an injection pressure transmission channel can be produced with lower clamping force and with greater dimensional accuracy. The molding preferably has the following characteristics:(1) a thick-walled section is substantially connected to a gate;(2) an injection pressure transmission channel is formed in the inside of the thick-walled section;(3) the injection pressure transmission channel is filled with the foamed injection pressure transmission material;(4) the injection pressure transmission material comprises a foamable low molecular weight polymer:(5) an amount of the injection pressure transmission material is 1/10 or less of that of the synthetic resin by volume;(6) a viscosity of the low molecular weight polymer is 1/50 or less that of the synthetic resin at injection, and 0.5 poise or more;(7) a ratio of (a viscosity of the low molecular weight polymer at 120.degree. C.)/(that at 220.degree.

Abstract: It has been conventionally considered difficult to adhere a mold metal and a polyimide, etc. whose coefficients of thermal expansion differ from each other by one figure and to retain the adhesion in injection molding, etc. involving severe heating-cooling cycles over several tens of thousands of times. The greatest merit of injection molding resides in that a molded article of complicated shape can be obtained through one shot. It has been demanded to obtain a mirror-smooth injection molded article with good molding surface reproduction without extending the mold-cooling time while retaining this merit. The present invention provides a mold satisfying both of the durability and the demand. The present invention relates to a mold for synthetic resin molding comprising a mold body made of a metal having a heat conductivity of not less than 0.05 cal/cm.multidot.sec.multidot..degree.C.

Abstract: Eclosion hormone (EH) was isolated and characterized using a variety of chromatographic techniques. EH is a polypeptide having 62 amino acids.

Abstract: This invention provides method and membrane for hemodialysis which has a total protein permeability of not more than 0.2%, and has a reduction rate of .beta..sub.2 -microglobulin of not less than 5%. The hemodialysis membrane of the present invention selectively removes .beta..sub.2 -microglobulin which was shown to cause some long-term complications such as carpal tunnel syndrome in the patients undergoing hemodialysis, while preventing the leakage of useful proteins.

Abstract: A lens system for a projection type television, having high focusing performance, a wide field angle and a reduced size. The lens system is composed of seven lenses, which are arranged successively from the screen side. The first lens, which is concave, and the second lens, which is convex, are cemented together to correct chromatic aberration. The third lens is a plastic lens for the correction of spherical aberration and astigmatism, at least one side of which is aspherical. The fourth lens, which is convex, and the fifth lens, which is concave, are cemented together to constitute an achromatic lens. In order to reduce the deterioration of focusing performance caused by changes in temperature, these two lenses are glass lenses and occupy the greater part of the power of the entire system. The sixth lens is an aspherical plastic lens for the correction of astigmatism and frame aberration, and the seventh lens is a plastic lens for the correction of image field curvature, using an aspherical surface.

Abstract: Web dividing and rewinding machine includes slitters, a front section and a rear section which are of similar construction and operate in a similar manner, and conveyors. Each section is provided with rewind core holders and a wide web is divided by slitters into longitudinally extending sub-webs. Each sub-web is wound on a rewind core mounted on the holder. Each rewind roll is transferred to a conveyor arranged between the front and rear sections and removed from the machine.

Abstract: This invention provides method and membrane for hemodialysis which has a total protein permeability of not more than 0.2%, and has a reduction rate of .beta.2-microglobulin of not less than 5%. The hemodialysis membrane of the present invention selectively removes .beta.2-microglobulin which was shown to cause some long-term complications such as carpal tunnel syndrome in the patients undergoing hemodialysis, while preventing the leakage of useful proteins.

Abstract: A shaped article comprised of a tetrafluoroethylene polymer with a number average molecular weight of at least about 10.sup.6 which exhibits specific heat shrinking properties represented by an average maximum expansion ratio of from 2 to 10, a least maximum shrinkage ratio of 0.71 or less, an orientation release stress at 200.degree. C. of less than 5 Kg/cm.sup.2 and a shrinking starting temperature of at least 80.degree. C. The shaped article has excellent compression creep resistance, compression resistance, impact strength, dimensional stability, gas barrier property and tensile strength. Accordingly, it can be advantageously utilized as a sealant, a lining material, a bearing pad, a sliding pad, etc.

Abstract: A shaped article composed of an at least biaxially orientated tetrafluoroethylene polymer of ultrahigh molecular weight, which has a draw ratio of at least 3.0, a specific gravity of at least 1.8 and an orientation release stress at 200.degree. C. of at least 5 Kg/cm.sup.2. The shaped article has excellent creep resistant and gas barrier properties, and can advantageously be utilized as a sealant, a lining material, a bearing pad, a sliding pad or the like. The shaped article may be produced by compressing a preformed sheet of a tetrafluoroethylene polymer at a temperature of from 170.degree. to 400.degree. C., under such conditions that plug flow of the polymer is produced, followed by cooling in the compressed state.

Abstract: A sheet winding apparatus comprises a take-out roller provided with a tension controller and adapted to take out a sheet rolled by a rolling unit so that uniform tension is applied to the sheet over its entire width, a dancer roller provided with a drive control mechanism and adapted to properly control the take-up tension in the sheet being taken out and wind the sheet on a take-up reel.

Abstract: A column comprising an insoluble carrier and an anti-.beta..sub.2 -microglobulin antibody immobilized to the carrier can specifically adsorb and remove .beta..sub.2 -microglobulin in the blood. This column is useful for the prevention and treatment of diseases such as carpal tunnel syndrome observed in patients undergoing blood dialysis.

Abstract: A support shaft for winding/unwinding sheets comprises a ring with the outer periphery thereof formed with a plurality of inclined grooves circumferentially spaced apart and with the bottoms of the inclined grooves inclined in the circumferential direction, rollers accommodated in respective inclined grooves for rolling in the longitudinal direction thereof to progressively increase the extent of projection therefrom with rotation of the ring, and an outer ring with a gap surrounding the ring with rollers.

Abstract: A compression forming apparatus for forming a thermoplastic resin sheet is disclosed wherein a thermoplastic resin blank is compressed between a pair of heated mold plates, the mold plates are cooled to solidify the thus-formed sheet, and the sheet is taken out from the mold plates. This compression forming apparatus has a clamping device, a pair of cooling die plates, a pair of mold plates which are attached to the cooling die plates, means for heating the mold plates, and springs or actuators enabling the mold plates to be held in contact with the cooling die plates when the mold plates are clamped and held in non-contact with the cooling die plates when the mold plates are opened.

Abstract: A plurality of sets of sheet drive rollers including a touch roller for urging a sheet against a core are provided on a running path, along which a sheet is supplied to a core in a shaft drive type winding unit. Two adjacent ones of said sets of sheet drive rollers are coupled to each other by a fine speed adjustment interlock mechanism. The speed change ratio of the fine speed adjustment interlock mechanism is adjusted to remove or reduce the variation in the tension in the sheet between the two rollers and also control the tension to a level suited for the winding.

Abstract: A sheet winding apparatus comprises a take-out roller provided with a tension controller and adapted to take out a sheet stretched by a stretching unit so that uniform tension is applied to the sheet over its entire width, a dancer roller provided with a drive control mechanism and adapted to properly control the take-up tension in the sheet being taken out and wind the sheet on a take-up reel.

Abstract: A strip-like sheet is slit into a plurality of slit sheets by means of cutters. The slit sheets are distributed to a plurality of winding positions and wound on a winding axle to form a sheet roll thereof on the winding axle. A touch roller provided with a driving mechanism is provided in each of the sheet rolls to make it possible for the slit sheet to be wound while the supply tension thereof is adjusted immediately before the winding.

Abstract: A winding shaft for a sheet rewinder comprises a hollow shaft provided in its peripheral wall with through-holes, a plurality of drum rings rotatably fitted around the hollow shaft, plungers inserted one in each through-hole, support rings provided at the opposite ends of the drum rings, and urging means disposed in the hollow shaft and adapted for outwardly urging the plungers. The hollow shaft is brought into engagement with the drum rings by means of the plungers being outwardly projected by the urging force of the urging means, consequently to permit the torque of the hollow shaft to be transmitted to the drum rings.

Abstract: A device for taking out sheet rolls and mounting sheet roll cores comprises a wheeled roll holder support capable of being advanced and retracted with respect to the sheet rolls, a sheet roll holder provided on the sheet roll holder support for vertical movement thereon and capable of receiving the sheet rolls, and core holding means provided on the sheet roll holder support or the sheet roll holder. This device is adapted to be used for a sheet winder which has a mechanism for discharging sheet rolls by withdrawal of a take-up shaft in the axial direction thereof from the sheet rolls. With this device, the withdrawn take-up shaft is returned to the take-up position after the sheet rolls have been discharged.

Abstract: The present invention concerns a process for a thin sheet molding of a thermoplastic resin easily and economically and also the thin oriented sheet molding prepared by such a process. Its specific feature resides in the steps of lubricating the inner surface of die, laying over one another thermoplastic resin blanks while being not adhered to each other in a die, compressing the layered structure at a temperature higher than the glass transition temperature of the thermoplastic resin blanks and separating the oriented molded products from each other.

Abstract: An apparatus is disclosed which winds a strip of scrap sheet (S) discharged as from a cutting unit of a sheet winding machine. In the apparatus which winds the strip of sheet on a winding frame (7) while causing the strip of sheet to be reciprocated relative to the winding frame, the strip of scrap sheet is wound up without breakage or slackening by keeping a touch roller (1) in contact with the aforementioned winding frame, causing the touch roller to be rotated at a peripheral speed equal to the discharging speed of the strip of sheet, and adjusting winding torque so as to enable the strip of sheet to be wound with the optimum tension.