Abstract: A power module for an electrostatic air cleaner in which an electronic power supply circuit and its components are enclosed within a relatively small modular housing having an AC voltage input in the form of plug-in blades particularly adapted to be inserted within a standard or conventional AC electrical outlet, and a cable for transmitting the high-voltage DC output from the housing to the air cleaner.

Abstract: An apparatus for securing the free ends of an elongated strip of flexible material to form a band, such as an elastic band for various types of apparel. The machine includes a securing station, such as a sewing station including a sewing machine, and an apparatus for drawing a strip of flexible material longitudinally beneath the securing station in a measuring path. A measuring device deflects a predetermined length of the strip downward away from the measuring path to form a measured open loop. A knife mechanism cuts the trailing end portion of the loop. Loading and clamping mechanisms position the free ends of the loop in the securing station for attachment, such as by stitching. An ejection mechanism withdraws the finished loop from the sewing station for discharge. The measuring device is provided with adjustment means for adjusting the length of the deflected loop and therefore the size of the completed band.

Abstract: A portable electrostatic air cleaning device having a minimal depthwise air-flow dimension, and particularly adapted to be substituted in an air conduit for a typical furnace or air conditioner filter. Ionizer wires and narrow collector plates are alternately spaced widthwise of the air cleaner, preferably between a pre-filter screen and an after-filter screen. The narrow collector plates are mounted within the device at an angle to the air flow direction to effectively lengthen the air flow through the air cleaning device.The pre-filter screen and the after-filter screen preferably contain electrically conductive materials which are charged to the same potential as the collector plates in order to maximize the electrostatic field strengths.