Abstract: Disclosed herein is a method of distributing a washcoat along channels of a particulate filter substrate, the method including: forcing a washcoat slurry a predetermined distance into the channels, the predetermined distance being less than or equal to the full length of the channels; clearing an excess amount of washcoat slurry from the channels; and arranging a remainder of the washcoat slurry within the channels, the arranging including applying a first vacuum to a first end of the particulate filter substrate after the clearing. In one embodiment the clearing includes applying a second vacuum to a second end of the particulate filter substrate. In another embodiment, the clearing includes pulling the excess washcoat slurry from the channels. The predetermined distance may be less than or equal to the full length of the channels.

Abstract: Disclosed herein is a method of distributing a washcoat along channels of a particulate filter substrate, the method including: forcing a washcoat slurry a predetermined distance into the channels, the predetermined distance being less than or equal to the full length of the channels; clearing an excess amount washcoat slurry from the channels; and arranging a remainder of the washcoat slurry within the channels, the arranging including applying a first vacuum to a first end of the particulate filter substrate after the clearing. In one embodiment the clearing includes applying a second vacuum to a second end of the particulate filter substrate. In another embodiment, the clearing includes pulling the excess washcoat slurry from the channels. The predetermined distance may be less than or equal to the full length of the channels.

Abstract: Closed flow-through apparatus and method for gassifying a dairy-type confection mix by applying a pressure head of nitrous oxide to an enclosed receptacle and projecting the mix into the receptacle and atomizing it therein. Atomization is accomplished by projecting a stream of said mix against a surface in said receptacle or toward a rapidly driven impeller. A metered quantity of an edible refrigerant, such as Freon 115, is also distributed into the mix. After gassification, the saturated mix is vented under the pressure of the pressure head into a freezing chamber which is provided with a valved outlet and a motor driven dasher. A control circuit provides an automatic mode as well as a wash cycle and a dasher drive mode.