Abstract: This invention is directed to a method and an apparatus to heat certain particles. These certain particles are heated to make them more desirable. In the heating of these particles, it is often desirable to expand the particles to make a light-weight aggregate. The light-weight aggregate may be used in making a building material or the like. In carrying out the process of heating these particles, there is used air for combustion of the combustible fuel and only a minimum of air for carrying of the particles or expansion of the particles.

Abstract: This invention is directed to an apparatus and method for transferring the outline of a drawing to a copy sensitive base. In the transferring of the drawing there is employed a uniform intensity of light to have a uniform transfer of the drawing to the copy base without hot spots on the drawing. The size of the drawing and the copy base can be any reasonable size such as fifty feet by fifty feet.

Abstract: This invention is directed to a method and an apparatus to heat certain particles. These certain particles are heated to make them more desirable. In the heating of these particles, it is often desirable to expand the particles to make a light-weight aggregate. The light-weight aggregate may be used in making a building material or the like. In carrying out the process of heating these particles, there is used air for combustion of the combustible fuel and only a minimum of air for carrying of the particles or expansion of the particles.

Abstract: This invention is directed to facilities for storing food in a controlled atmosphere wherein the temperature is regulated and the relative humidity is regulated. An important element in achieving a controlled atmosphere for the storage of food is the storage building. If the storage building is, properly, designed and constructed so as to provide a vapor barrier and also to provide thermal insulation, the storing of the food is made easier for realizing a desirable stored product. With the combination of a vapor barrier and also thermal insulation, there is less possibility of condensation of moisture in the storage building.