摘要:
In an apparatus of manufacturing diaphragms, a layer of a difficulty flowable metal powder is applied to a support, a wire net is rolled onto the powder layer and the latter is compacted at the same time and the metal powder is fired at 800.degree. to 1500.degree. C. in an oxidizing atmosphere. In order to impart to the diaphragms a constant thickness, strength and density, the metal powder is uniformly distributed and applied as regards its bulk volume to the support and the powder layer is moved under a distributing roller rotating opposite to the direction in which the powder is fed.
摘要:
In a process of producing composite materials consisting of sheet metal plates, metal strips and foils and provided with a skeleton surface structure, a layer of a metal powder which is difficultly flowable and consists of irregularly shaped particles is applied to a continuously moved metallic carrier layer and is bonded to said carrier layer by cold roll cladding and is sintered in a reducing atmosphere at temperatures of 600.degree. to 1000.degree. C. In order to produce composite materials in which the skeleton structure constitutes a layer that is of uniform thickness throughout the surface and is firmly bonded to the carrier layer, the metal powder is uniformly distributed and applied as regards its bulk volume using a distributing roller, which rotates opposite to the main direction of movement of the carrier layer, whereby a uniform thickness is obtained.
摘要:
The present invention relates to dispersion-based paints or varnishes, more particularly for use as coating material (architectural paint), which have a low pigment volume concentration (PVC), lower than the critical pigment volume concentration (CPVC). The varnishes have high water vapour permeability and low water absorption.They are notable for good weathering resistance and resistance to wet abrasion, shade stability and chalking stability, and a variable, adjustable gloss.
摘要:
Yield and selectivity of olefin acetoxylation are improved through the use of successive catalyst zones of different reactivities, the successive zones contained in one or more reaction tubes arranged is parallel.
摘要:
Disclosed herein is a liquid crystal display in which a system board and a timing control board can be used in common in a 60 Hz driving mode and a 120 Hz driving mode without being modified. The liquid crystal display includes a system board for identifying a driving frequency of video data and supplying the video data and control signals at a first driving frequency or second driving frequency as a result of the identification, a timing control board equipped with a timing controller for processing the video data and control signals from the system board, the timing control board supplying the processed video data and control signals at the first or second driving frequency, and a liquid crystal panel for displaying an image based on the video data and control signals supplied from the timing control board.
摘要:
According to the invention, .alpha.-chloracetoacetamides, which is to be understood as including both .alpha.-chloro-N-monoalkylacetoacetamides and .alpha.-chloro-N,N-dialkylacetoacetamides, the alkyl radicals of which contain 1 to 3 carbon atoms, are produced by reacting the corresponding acetoacetamides with chlorine in aqueous solution at temperatures in the range of from -1.degree. C. to -25.degree. C. At a conversion of at least 95%, a selectivity of at least 97% and a yield of at least 95% of the theoretical yield, calculated on reacted acetoacetamide, are obtained.
摘要:
Disclosed herein is a liquid crystal display in which a system board and a timing control board can be used in common in a 60 Hz driving mode and a 120 Hz driving mode without being modified. The liquid crystal display includes a system board for identifying a driving frequency of video data and supplying the video data and control signals at a first driving frequency or second driving frequency as a result of the identification, a timing control board equipped with a timing controller for processing the video data and control signals from the system board, the timing control board supplying the processed video data and control signals at the first or second driving frequency, and a liquid crystal panel for displaying an image based on the video data and control signals supplied from the timing control board.
摘要:
A therapeutic device and method for providing therapeutic relief are provided. A vapor permeable outer cover is secured to a vapor permeable inner cover. The outer cover and inner cover define at least one enclosed interior space therebetween with both the outer and inner cover being permeable to microwaves. The inner cover defines an inner surface that forms a collapsible appendage receiving chamber. The outer cover and the inner cover form at least one opening leading into the appendage receiving chamber. The at least one opening and the appendage receiving chamber are thereby capable of receiving an appendage of a user. A water absorbent material is disposed within said interior space between the outer and inner covers. The water absorbent material is capable of water vapor release upon application of energy thereto.
摘要:
In a process of manufacturing diaphragms, a layer of a difficulty flowable metal powder is applied to a support, a wire net is rolled onto the powder layer and the latter is compacted at the same time and the metal powder is fired at 800.degree. to 1500.degree. C. in an oxidizing atmosphere. In order to impart to the diaphragms a constant thickness, strength and density, the metal powder is uniformly distributed and applied as regards its bulk volume to the support and the powder layer is moved under a distributing roller rotating opposite to the direction in which the powder is fed.
摘要:
A process for stabilizing aqueous solutions of acetoacetamides which simultaneously results in the reduction of .beta.-aminocrotonic acid amide content. According to the process, to aqueous acetoacetamide solutions which have been prepared in a known manner by the reaction of diketene with ammonia or water-soluble primary or secondary aliphatic amines under basic conditions, sufficient amounts of diketene are added immediately after their preparation thereto at room temperature with vigorous stirring, to maintain a pH value of 6-7. The so obtained aqueous solutions of the acetoacetamides are not only substantially stable, but also especially pure since these solutions are neither contaminated by salt-like by-products nor by derivatives of .beta.-aminocrotonic acid amides.