Abstract: A flat display panel assembly includes an evacuated glass envelope having a faceplate, a source of electron beams, a control electrode assembly including a stack of electrode substrates each having a predetermined pattern of electrode holes defined therein, and anodes formed by depositing phosphor material on the faceplate in correspondence with the electrode holes in the electrode substrates. At least one of the electrode substrates is made of a material having a coefficient of thermal expansion different from that of the remaining electrode substrates. The electrodes holes in such one of the electrode substrates are so defined and so arranged as to be offset from the corresponding electrode holes in the other electrode substrates by an increasing as a distance increases from a center portion of the electrode assembly towards the perimeter of the electrode assembly. With the electrode holes so defined and so arranged, the electrode substrates are movably supported to accomodate the thermal expansion.

Abstract: A picture display device includes an envelope having a faceplate, having an inner surface formed with a phosphor screen, and a back covering coupled to the faceplate to define an evacuated chamber; filament-like cathode electrodes and electron beam control electrodes disposed within the evacuated chamber for emitting electron beams towards the phosphor screen; a cathode electrode support member for retaining the cathode electrodes and having one of opposite surfaces held in contact therewith; a shape retention plate for retaining at least the cathode electrodes and the support member in a predetermined curved shape; a plurality of support struts for fixing the shape retention plate in a face-to-face relationship with the phosphor screen; and a reinforcement grid structure disposed in contact with a surface of the shape retention plate opposite that facing the phosphor screen so as to follow the curvature of the shape retention plate.

Abstract: A flat panel display device which comprises a face glass plate, a metal container assembled to the face glass plate through a frit glass for providing an envelope for accommodating electron beam generating means and electron beam control means, the metal container including an outer container made of a thin metal plate and an inner container separately assembled to the inside of the outer container for acting as a pressure resistive container for supporting air pressure. Only the outer container is joined to the face glass plate.

Abstract: A flat panel display device which comprises a face glass plate, a metal container assembled to the face glass plate through a frit glass for providing an envelope for accommodating electron beam generating means and electron beam control means, the metal container including an outer container made of a thin metal plate and an inner container separably assembled to the inside of the outer container for acting as a pressure resistive container for supporting air pressure. Only the outer container is joined to the face glass plate.

Abstract: A process for preparing polyoxyalkylene polyamine having secondary amino groups at the end of polymer chain by reaction of polyoxyalkylene polyol with primary amine is disclosed.Polyoxyalkylene polyamine having higher content of the secondary amino groups can be obtained by using a catalyst containing (1) Ni and Zn, (2) Co and Zn, or (3) Ni, Co and Zn; by using a conventionally known catalyst in the presence of monohydric alcohol; or by using the catalyst containing (1) Ni and Zn, (2) Co and Zn, or (3) Ni, Co and Zn, in the presence of monohydric alcohol.

Abstract: A colored zinc composite-plated steel sheet which comprises a steel sheet or a plated steel sheet, a colored composite-plating film comprising zinc and an oxide of a coloring metal such as nickel, cobalt, iron, chromium, tin or copper and provided on the steel sheet at a coverage of 0.1-5 g/m.sup.2 and a transparent guard coat of 3 .mu.m or less thick provided on the film is obtained by carrying out electrolysis in an acidic aqueous solution containing zinc ion, a coloring metal ion and nitrate ion, nitrite ion, perchlorate ion, chlorate ion, condensed phosphate ion and having a pH of 1-4 using the steel sheet or plated steel sheet as a cathode at a current density of 5-100 A/dm.sup.2 and a current quantity of 20-200 coulomb/dm.sup.2.

Abstract: Disclosed is a Zn-Ni based composite plated steel sheet excellent in corrosion resistance and workability which comprises a ferrous substrate and, provided thereon, a Zn-Ni based composite electroplating layer comprising 1-15% by weight of Ni, 0.1-10% by weight of Cr, 0.1-10% by weight of SiO.sub.2, 0.01-3% by weight of Fe and the balance being essentially Zn. This steel sheet may further have a Zn or Zn based alloy electroplating upper layer to further improve corrosion resistance after coating. Furthermore, in order to remarkably improve corrosion resistance, the steel sheet may further have a hardly soluble chromate film layer of 10-150 mg/m.sup.2 in total Cr content and an epoxy resin thin film layer containing agglomerated SiO.sub.2 provided on said chromate film layer.This is a continuation-in-part of pending U.S. patent application Ser. No. 07/272,846 filed Nov. 18, 1988 and entitled "Zn--Ni BASED COMPOSITE ELECTROPLATED STEEL SHEET", disclosure of which is incorporated herein be reference.

Abstract: In a flat-shaped display apparatus has a face plate, a rear plate, side plates, and necessary electrodes therein, a supporting plate and plural supporting rods which are connected to an edge of the supporting plate at intervals of a certain distance are provided between the face plate and the rear plate. The supporting rods are made of metal and all bonded parts are covered by guide plates so that no adhesive is exposed to the electron beams. Therefore, over-scanning of the electron beams can be made, without the electron beams impinging on the adhesive thereby enabling effective distortion compensation.

Abstract: In an electron beam generation apparatus for a flat cathode ray tube, line cathodes are stretched in an arc shaped form and held by plural cathode position defining members. The cathode position defining members are disposed along the line cathode in a forward convex arc which protrudes most at its center and less towards its respective ends. An electron beam take-out electrode is placed at a in front side of the line cathode and a back electrode is placed at a back side of said line cathode, the electron beam take-out electrode and back electrode also being arc shaped.

Abstract: Disclosed is a steel sheet having an organic composite plating layer excellent in press workability, spot weldability, electrodeposition coatability and corrosion resistance which comprises a zinc plated, aluminum plated or zinc base composite alloy plated steel sheet, a first layer of an insoluble chromate film of 5% or less in the content of water-soluble matter formed on the surface of the steel sheet at a coverage of 10-150 mg/m.sup.2 in terms of chromium content and a second layer of a coating composition having the following composition coated at a thickness of 0.3-5 .mu.

Abstract: A colored zinc composite-plated steel sheet which comprises a steel sheet or a plated steel sheet, a colored composite-plating film comprising zinc and an oxide of a coloring metal such as nickel, cobalt, iron, chromium, tin or copper and provided on the steel sheet at a coverage of 0.1-5 g/m.sup.2 and a transparent guard coat of 3 .mu.m or less thick provided on the film is obtained by carrying out electrolysis in an acidic aqueous solution containing zinc ion, a coloring metal ion and nitrate ion, nitrite ion, perchlorate ion, chlorate ion, condensed phosphate ion and having a pH of 1-4 using the steel sheet or plated steel sheet as a cathode at a current density of 5-100 A/dm.sup.2 and a current quantity of 20-200 coulomb/dm.sup.2.

Abstract: A method for producing a steel sheet electroplated with a Zn-series alloy or Zn-series composite material, comprising, using an identical plating liquid, forming an initial electroplated layer in an amount essentially smaller than a subsequent main plating layer: relieving an electrodeposition strain in the initial electroplated layer after or during the formation thereof, and forming the main plating layer on the initial electroplated layer essentially free of the electrodeposition strain, thereby improving a plating adherence of the electroplated layer of Zn-series alloy or Zn-series composite material.

Abstract: In the electroplated steel sheets for automobile use, the chipping resistance, water-resistant adhesion, unpainted corrosion resistance, post-painted corrosion resistance, and resistance to secular exposure are improved by superimposing a chemical conversion layer between electroplated layers of zinc and iron, nickel, cobalt, or alloys thereof.

Abstract: A weldable steel plate plated with zinc, a zinc base alloy or zinc composite and coated on the plating with a coating material comprising a mixture of at least one type of ferrous alloy powder with an oxygen concentration of 1.0% by weight or less and zinc dust, is provided, and the weldable coated steel plate also has good workability, coherence, weldability and corrosion resistance.

Abstract: In the method for scanning light beam in a xerographic recording using a laser light beam spots to scan on a photoreceptor the quality of the recorded image is improved by increasing size of the light beam spot when the irradiation spot scanning on the photoreceptor has neighboring spots to be irradiated. For detecting whether the neighboring spots are the spots to be irradiated or not, three shift registers 12, 13 and 14 and a NOR circuit 15 are used, and the output of the NOR circuit controls analog circuit 161 which switches amount of the laser current.

Abstract: In a fret saw blade having a shank portion and saw-teeth, the saw-teeth are formed in a manner that the centers of the cutting edges of some saw-teeth are depressed and deformed generally in V-shape so as to form sharp ends projecting beyond the side surfaces of the shank portion of the fret saw blade.

Abstract: An improved process for the production of polytetramethylene ether glycol is disclosed. Polytetramethylene ether glycol is obtained with a high yield by subjecting tetrahydrofuran to ring opening polymerization in the presence or absence of an organic solvent with the use of, as a catalyst, a lithium halide in conjunction with fuming sulfuric acid. Average molecular weight of the glycol product can be controlled in the range of 1000-3000 at will by varying the amounts of the lithium halide and fuming sulfuric acid used.

Abstract: Disclosed is a steel sheet having an organic composite plating layer excellent in press workability, spot weldability, electrodeposition coatability and corrosion resistance which comprises a zinc plated, aluminum plated or zinc base composite alloy steel sheet, a first layer of an insoluble chromate film of 5% or less in the content of water-soluble matter formed on the surface of the steel sheet at a coverage of 10-150 mg/m.sup.2 in terms of chromium content and a second layer of a coating composition having the following composition coated at a thickness of 0.3-5 .mu.