Appeal No. 96-4152
Application 08/177,391
may include a series of cartridges like the one illustrated in
Figure 2. Each cartridge comprises an inorganic yarn wound
over a perforated tube 16 to provide an inner filtering
element 20, an
electrically resistive expanded metal sleeve 21 covering the
inner filtering element, and an organic yarn wound over the
sleeve 21 to provide an outer filtering element 22 (column 3,
lines 41 to 49). When the volume of particulates collected
from the diesel exhaust requires that the filter be
regenerated, a voltage is applied across the expanded metal
sleeve to heat it resistively to a temperature that burns off
the particulates (column 4, lines 1 to 7).
Stobbe and Bly also relate to electrically regenerated
diesel particulate traps. In Stobbe, resistive heater element
28 is shown schematically in Fig. 3 to be located within an
aperture formed by a stack of porous filter discs 20. In Bly,
resistive
heater elements 24 in the form of wires or rods are located
within the gas passages 20, 22 of ceramic monolith filter body
12, the wires or rods being positioned such that they are
spaced
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Last modified: November 3, 2007