Abstract: Machine for marking objects, such as steel sheets, comprising a frame, a raisable and lowerable holding cylinder being suspended from the frame, and an embossing head being arranged beneath and connected to the holding cylinder. An embossing wheel shaft being arranged in the embossing head, and a plurality of embossing wheels being arranged on the embossing wheel shaft. The embossing wheel shaft is connected to a driving motor, secured to the embossing head at the bottom, said embossing wheel shaft being formed so as the embossing wheels one by one are pressed down towards the object when the embossing wheel shaft is turned by means of the driving motor.

Abstract: A method and an apparatus for heating a granular aggregate for mixture with asphalt by means of a flue gas being chemically inert to the aggregate. The aggregate is moved intermittently within the gas under control of the stationary periods of driven screw conveyors. The apparatus has several heating sections, each section having a conveyor, a thermostat with a sensing device at the end of the section, and possibly also an oil burner, the thermostat being connected to the driving means of the conveyor.