Kyowa Electric and Chemical Co., Ltd.

Purolite Corporation

Kyowa Electric & Chemical Ltd.

Junji Fukuda

Kashichi Hirota

Susumu Seto

Serguei Rudolfovich Kosvintsev

Adrian Burt

Speriodal polymer beads having a uniform size are prepared by polymerizing uniformly sized monomer droplets formed by dispersing a polymerizable monomer phase over a cross-flow membrane into an aqueous phase. A shear force is provided at a point of egression of the polymerizable monomer phase into the aqueous phase, the direction of shear substantially perpendicular to the direction of egression of the monomer phase. The polymer beads can be employed in applications where beads having uniform diameters of 10 to 180 &#x3bc;m are useful.

Method of producing uniform polymer beads of various sizes

A stationary board adapted to be set up in a medial strip between traffic lanes to block lights of oncoming vehicles in the medial strip and facilitate identification of the medial strip in nighttime driving or riding. This stationary board comprises a pair of plate members each composed of a molded component made of a transparent plastic material, and the plate members are coupled with one another at the respective marginal edges thereof to form an integrated assembly having a hollow space therein. Each of the plate members is formed with irregularities in its inner surface facing the hollow space of the assembly. A top member molded of a plastic material is attached to the top portion of the assembly in a fitting manner. The plastic material of the top member contains a luminous pigment capable of absorbing, storing and emitting light. The stationary board of the present invention can bring out a function of facilitating identification of the medial strip in nighttime driving or riding as well as blocking lights of oncoming vehicles, while offering excellent aesthetic appearance.

Stationary board for blocking lights of oncoming vehicles in medial strip and facilitating nighttime identification of medial strip

A method of manufacturing a diffusion plate for use in a screen plate of projection TV is disclosed. The diffusion plate having a plurality of quadrangular pyramid protrusions almost over one side thereof is manufactured by means of injection molding process of plastic material. This method uses a first molding die having a first molding die surface, a pre-molding die capable of forming a first volume of molding cavity in matching with the first molding die, and a second molding die capable of forming a second volume of molding cavity smaller than the first volume in matching with the first molding die. The molding process comprises; a first step of, with matching the first molding die with the pre-molding die, injecting a molten plastic material from the injection port into the first volume of molding cavity formed between the first molding die and the pre-molding die; and the second step of, after completed the injection in the first step and before curing of the plastic material, releasing the first molding die from the pre-molding die and then matching the first molding die with the second molding die, wherein the plastic material injected in the first step is compressed in the second volume of molding cavity so as to mold the diffusion plate from the plastic material between the first molding die and the second molding die.

Method of manufacturing plastic thin-plate article with protrusions on surface thereof

A combination of beverage can cap and straw, including a beverage can cap including a top plate portion and a peripheral rim portion which is to be fitted into a can edge of a beverage can. The beverage can cap being formed with a straw-inserting aperture at a position corresponding to a drinking aperture which is to be opened in a top cover of the beverage can. The beverage can cap being formed with a straw retaining portion on the outer surface of the peripheral rim portion as rising outward in a direction orthogonal to the surface of the top plate portion. The straw retaining portion having a fitting slot capable of retaining a straw fitted thereinto. A straw having a diameter capable of being fitted into the fitting slot formed in the straw-retaining portion. The straw being formed with a bendable accordion-like portion.

Beverage can cap and straw

A system which enables to observe an image without any trouble by suppressing an occurrence of the Moir&eacute; interference fringes, when implementing an enlarging observation of an image using a thin lens with respect to an image display screen having a plurality of pixels arranged two-dimensionally with a periodicity, such as the CRT display or the liquid crystal display is provided. The system for enlargedly observing an image on an image screen having a plurality of pixels arranged two-dimensionally with a periodicity, said system includes a thin transparent lens means configured to enlargedly and transparently observe an image, and arranged with a plurality of image enlarging optical elements in two-dimensions having a periodicity by a predetermined pitch. The lens means has an overall magnifying power in the range of 1.01&tilde;1.20, and is placed on an observer side apart from the image screen with a predetermined gap. The predetermined gap between the lens means and the image screen is in the range of 2 mm&tilde;40 mm, and the pitch of the plurality of image enlarging optical elements formed in the lens means is in the range of 0.023 mm&tilde;0.25 mm. The predetermined gap between the lens means and the image screen is defined in association with the pitch of the optical elements of the lens means such that an intensity of Moir&eacute; interference fringes caused by a periodicity of an arrangement of the pixels in the image screen and a periodicity of an arrangement of the optical elements of the lens means must not exceed 0.15 in an absolute value.

System for enlargedly observing an image, and filter assembly for use in the system

There is disclosed a Fresnel lens, adapted to be placed in front of a display screen of a computer or a television set in order to magnify images for observation, which does not cause a rainbow-like pattern to appear even when annular prism elements as the constituent elements of said Fresnel lens are arranged at a fine pitch. A spherical surface having a radius of curvature corresponding to the focal distance of the lens formed by said annular prism elements of said Fresnel lens is formed within a circular area defined by a predetermined radius around the optical axis, where the rainbow-like pattern would otherwise appear due to diffraction. The predetermined pitch in arranging a plurality of annular prism elements of the Fresnel lens is equal to or less than 0.25 mm and the height of the annular prism elements in the circular area is equal to or less than 5 &mgr;m and preferably equal to or less than 7 &mgr;m.

Image magnifying Fresnel lens for observation of a on display screen

A magnetic head drum for a magnetic recording apparatus comprising a metallic ring of a predetermined thickness, and a support body of a plastic material formed in said metallic ring through an outsert forming process. The support body of the plastic material includes a peripheral ring-shaped portion, a central boss portion for receiving a rotating shaft and a web portion connecting the ring-shaped portion with the boss portion. A plurality of magnetic heads are provided on a periphery of the drum to rotate as a unit with the metallic ring. There is also disclosed a method for manufacturing the magnetic head drum through an injection molding process of a plastic material using a metallic ring of a predetermined thickness.

Method for making a magnetic head drum for a magnetic recording apparatus

A method of manufacturing a cabinet for use with a display, the cabinet having a sandwiched structure at portions requiring extra strength such as the picture tube or display screen setting portion, the sandwiched structure including a flat outer surface including a resin and a core including a fiber-reinforced resin mixture. Other portions of the cabinet can be formed relatively thin-walled.

Growing community of inventors

Tokyo, Japan

Junji Fukuda