Abstract: The invention relates to a method for producing mineral wool, wherein a mineral base material is melted in a cupola furnace having a shaft to hold the base material, the lower section of said shaft being provided with a grate, and beneath said grate there is a combustion chamber. The combustion chamber is heated by one or a plurality of burners, the burner or burners being run on liquid or gaseous fuel and an oxygen-containing gas. The burners are operated such that the length of the flames occurring during combustion of the fuel with the oxygen-containing gas is between 60% and 100% of the combustion chamber diameter.

Abstract: The invention relates to a method for producing mineral wool, wherein a mineral base material is melted in a cupola furnace having a shaft to hold the base material, the lower section of said shaft being provided with a grate, and beneath said grate there is a combustion chamber. The combustion chamber is heated by one or a plurality of burners, the burner or burners being run on liquid or gaseous fuel and an oxygen-containing gas. The burners are operated such that the length of the flames occurring during combustion of the fuel with the oxygen-containing gas is between 60% and 100% of the combustion chamber diameter.

Abstract: Method and device for manufacturing siliceous melts to produce light-yellow mineral wool fibres using a cupola furnace includes (a) a charge including at least two different types of briquet, wherein chemical components take into account an anticipated proportion of iron, (b) the components of Al2O3 in the briquets are a supporting structure for the melting process, (c) a plurality of high temperature gas burners for heating, an arrangement of said gas burners chosen such that the burner flames reinforce each other, (d) collecting pan flared conically downwards from a mantle of a shaft in the furnace to a floor of the furnace.

Abstract: A projection copying apparatus for reproducing microfilmed originals on a light-tightly disposable projection screen and for producing copies of microfilmed originals comprises means for copying of dot originals operating for complete or sectional copying of the originals, and a projection screen including a diffusing disc, an LCD dics arranged on the diffusing disc, the LCD disc being switchable between two conditions so that in one of the conditions it is transparent for observation of the originals and in the other of the conditions it is opaque for copying or searching.

Abstract: An arrangement for unloading and loading of x-ray sheet film cassettes of standardized but different sizes of their flat sides which also can be used for receiving different sheet film sorts and reloadable with respective sheet film sorts, comprises a light-tight closeable shaft for receiving a cassette, transporting unit for inserting and withdrawing of the cassettes, unit for positioning the cassette at a cassette corner which is the same for all cassettes, a mechanically-electronic comparison device for determining the format of a cassette, an opening device for the cassette, unit for withdrawing a film and inserting of a new film into the cassette, and unit for automatically distinguishing of cassette types with the same sizes or size regions and loadable with different film sorts and including at least one outwardly sensible marking provided on the cassettes of at least one type, at least one sensor arranged to sense the marking with a positioned cassette, and a comparison device which is connected for t

Abstract: An arrangement for determining two or more superimposed film sheets, particularly X-ray film sheets, in a transport after their withdrawal from the film sheet stack, has a light barrier with a light source at one side of the transport path and a photoreceiver at the other side thereof, and an evaluating circuit connected with the photoreceiver for producing a signal corresponding to the presence of two or more sheets and including a computer supplied with a value of the density of a first or test sheet introduced into the light barrier between the light source and the photoreceiver, so that the supplied value serves as a reference signal for measuring the next film sheet.

Abstract: An apparatus for loading and unloading of film cassette, in particular X-rays cassettes has a housing which defines a compartment in which the cassette is to be positioned, means for transporting the cassette into the compartment and for discharging therefrom, and means for removing the film from the cassette and loading the cassette with a new film. For recognizing the size of the cassette first and second identifying means are provided which determine the length and the width of the cassette. These determining means are in communication with comparing means which compare the determined values with nominal values corresponding to predetermined length-and-width values.