Abstract: A packaging device for forming a package having upper and lower sheets closed by the upper sheet being weldably secured to the lower sheet. The lower sheet is formed into a container for holding various types of material. The packaging device has an evacuating chamber having two chamber halves relatively movable with respect to each other. A nozzle bar is mounted on one of the chamber halves and is movable therewith toward and away from the other chamber half. A passageway is provided between the nozzle bar and the corresponding chamber half on which it is mounted and is adapted to receive the upper sheet therethrough. The lower sheet formed into a container is moved through a passageway between the two chamber halves when the chamber halves have been moved apart. A seal is provided around the nozzle bar and between the chamber halves to permit an evacuation of the evacuating chamber when the chamber halves are in mating engagement with each other.

Abstract: A device for controlling the speed of sheet materials which are fed to a deep-drawing station in a packaging machine. The sheets are advanced by the control device in a step-by-step manner toward the deep-drawing station. The speed of the motor is controlled in a step-by-step manner by a rotating cam member engaging either a part of the conveyor for the sheet material to measure a predefined length of movement by the conveyor for the material. The motor is started slowly so that the sheet material is accelerated slowly to a maximum speed and is thereafter decreased slowly in speed until it is stopped by reason of the measuring reaching the predefined limit.