Abstract: This invention is directed to a tape guide that minimizes the effects of vertical position error at the reels of a reel to reel tape drive by providing gentle tape guidance forces and coarse correction of magnetic tape and reduces the amount of debris accumulation and tape wear resulting from the load between the magnetic tape and the guiding elements of the tape guide, said tape guide having two compliant flanges and an tape guiding surface, said complaint flange comprising a plurality of spring members extending individually from a base member and a pad having high wear resistance and high mechanical strength mounted at the end of each spring member.

Abstract: An air filter for an internal combustion engine comprises a composite formed of first and second layers of reticulated foam plastics material with an open-mesh substrate between them, the two layers being bonded together through the openings in the open-mesh substrate and the composite impregnated with a dust-retaining substance. This arrangement results in a reservoir of the dust-retaining substance being maintained between the first and second layers of foam plastics material.

Abstract: An air filter comprising a first layer of reticulated foam plastic material having a thickness of between 10 mm and 20 mm and a porosity of between 5 and 60 pores to the linear inch, a second layer of reticulated foam plastic material having a thickness of between 6 mm and 10 mm and a porosity of between 60 and 100 pores to the linear inch, and at the interface between said first and second layers an open mesh substrate approximately one millimeter in thickness constricting a maximum of about ten percent of each of the first and second layers, the filter being impregnated with a flame proof retention and plasticizer additive, the first and second layers being bonded together at the interface.