Abstract:
A solution for making a resin film contains at most 5 % by weight, preferably 1 % by weight, of alpha -carbon methyl group polymer. By the solution, the combustion temperature can be lowered down, and the resin film can be completely volatilized without upward swelling of the aluminum thin film during the burning or baking step owing to the solution formed by the alpha -carbon methyl group polymer. Specifically, also in the method for dry electrophotographically manufacturing a screen of a CRT, the conductive layer, the photo-conductive layer, and the resin film can be completely volatilized without the upward swelling and unfastening of the aluminum thin film during the burning step in a frit furnace for sealed-assembling the panel and the funnel, so that the plane reflectivity of the aluminum thin film is improved and thus the picture quality of the CRT is greatly improved.
Abstract:
A solution for making a resin film enables an aluminum thin film to have an improved effective plane of reflection. The solution has inorganic particles. In a method for manufacturing a screen of a CRT using the solution, the resin film is formed on the light-absorptive material and the phosphor elements with the resin solution such as lacquer containing inorganic substance, and the aluminum thin film is formed on the resin film, the aluminum thin film functioning as a conductive film and a plane of reflection. Thereafter, volatilizable constituents are driven off from the conductive layer, the photo-conductive layer, and the resin film by heat.
Abstract:
The invention relates to two measures for improving the surface quality of the display surface of a display screen thereby making any further processing unnecessary. Firstly, the form is divided into two parts that can be easily processed so as to improve the surface quality of the form in the visual area section. Secondly, a glass panel is placed in the form which prevents the flowing of additionally fed glass droplets to the surface of the form.
Abstract:
A process is disclosed for use in the manufacture of a color cathode ray tube having a rectangular flat faceplate. The process comprises positioning the faceplate in a predetermined x-y plane by referencing faceplate a-b-c reference areas on two adjacent edges or sides of the faceplate with complementary a-b-c reference points on a faceplate locating fixture; the fixture also has three spaced six-point precision indexing means. With the faceplate a-b-c reference areas and the faceplate locating fixture a-b-c points mutually referenced, six-point precision indexing means are attached to the faceplate in registration with the precision indexing means on the faceplate locating fixture. Using the precision indexing means attached to the faceplate, a shadow mask is registered with the faceplate through the use of complementary precision indexing means to provide a faceplate shadow mask assembly in mutual precise registry. Using the registered faceplate-shadow mask assembly, a pattern of phosphors is photodeposited on the faceplate by photoexposure means. The registry of the pattern of phosphors and the shadow mask is accomplished according to the invention with a precision made possible by the use of the six-point precision indexing means, and the location of the patterns on the faceplate is made possible by the use of the a-b-c referencing of the faceplate and the faceplate locating fixture.
Abstract:
A functional film is uniformly stuck to the surface of a panel having a curvature in three-dimensional directions by using press rollers. Press roller sections (41 and 42) having equalizers which are displaceable in accordance with the variation of the curvature, in the roller forward direction (X), of the first and second edge portions (E1 and E2) of the surface (1S) of a panel are provided on the first and second edge protions (E1 and E2) behind a main press roller section (3) in terms of the roller forward direction (X) and pressure regulators which regulate the pressing pressures of rollers are provided to the press roller sections. The two follow-up press roller sections (41 and 42) are moved in the forward direction (X) of the rollers, following up the movement of the main press roller section (3) by moving the section (3) in the direction (X) as the leader. This panel can be applied to a CRT display device etc.
Abstract:
A method for production of graph scales of a panel of a cathode-ray tube for an oscilloscope for forming the panel graph scales by exposing and developing a slurry precipitate on a panel through a mask having cathode scales. More particularly, the present invention relates to a panel graph scale production method of a novel type characterized in that a specific filter having light transmissivity of about 62 % at the center is disposed between the mask and a light source. According to this method, it is not necessary to arrange a large number of parallel ray lenses between the mask and the light source as opposed to the prior art, the distance between the panel and the light source can be drastically reduced, the overall exposure system for producing the scales can be greatly simplified, and the intended panel graph scales can be produced under an ideal condition.
Abstract:
The invention relates to a device for internally graphitizing the neck surface of the cone of cathode-ray tubes. Such a device comprises a frame (110) carrying two arms, including (7a), which are capable of rotating about an axis, including (yy), and carrying each a flange (9a), for example, adapted each to a given type of cone (1). Said flange (9a) has two functions: one function is to provide for the centering according to an axis (xx) of the neck (3) of the cone (1) and the other function is to define a reference line (LR). With these arms cooperate, on the one hand, a bearing plane (4) on which the cone (1) is layed and centered in a horizontal plane, and on the other hand, a graphitizing system (77) so that the brush (21) reaches in its high position a predetermined upper limit (Lg), and finally, a combination of means providing for the upwardly translational motion of the bearing plane (4) and of the graphitizing system, the regulated lowering of the latter, the bearing plane remaining motionless during this lowering phase of the brush (21). The invention applies to the fabrication of cathode-ray tubes.