Abstract: A motor-driven conveying roll for conveying systems includes a roll which is rotatably mounted with respect to a frame. A drive unit is fixed to the frame and the output shaft of the drive unit is frictionally connected to the inner surface of the hollow conveying roll by a pressure-exerting unit.

Abstract: An acoustic impedance matching enclosure is provided having a driver loaded into a chamber buffering the throat/mouth of a closed loop transmission line. Transmission line consists of a termination member, outer and inner enclosure walls, high-density lining and throat/mouth area. Transmission line eliminates internal random standing waves while providing variable-frequency standing waves that through superposition of the waves compensates for mass-acceleration loss of the high-end of the driver output while damping the resonance of the driver. Alternative application of the acoustic impedance matching enclosure is that of compression loading the driver directly into the closed loop transmission line and using an acoustic low pass filter to translate the output into low frequencies only through a port.

Abstract: A cell co-culture tool includes a body, an outer wall surrounding the body, and more than one vessel within the perimeter of the outer wall. Each vessel has a top edge below a rim of the outer wall. A method of interacting a substance with more than one type of cell material in a culture dish having a plurality of wells includes depositing a different type of the cell material in separate wells of the culture dish, interconnecting the wells with a fluid medium, and adding the substance to the fluid medium.

Abstract: A power supply assembly includes a housing having side walls, end walls, and a bottom wall defining a rectangular box with an interior space and an open top. A first dividing wall and a second dividing wall are positioned in the interior space of the housing which divides the interior space into first, second, and third compartments. A method of manufacturing a power supply with the above power supply assembly includes installing a printed circuit board in the second compartment and positioning the first wire set to terminate in the first compartment and the second wire set to terminate in the third compartment.