| abstract |
The structure suitable for particulate filters has an inlet face and an exit face, and comprises a plurality of inlet cavities and a plurality of exit cavities extending through the faceplate structure. input to the output face, the input cells being open at the input face and closed at the location adjacent to the output face, and the output cells being open at the exit face and closed at the place adjacent to the entrance face. The input and / or output cells have a quadrangular cross-section and are arranged in an alternating pattern; the output cells may have a generally smaller cross-section than the input cells and no point of a given input cell is closer to an adjacent input cell than to an output cell adjacent. |