Patent ID: 7331364
Filing Date: 2008-02-19
Classification: A62B,B01D

Abstract:
1. A method of filling a filter canister with a particulate filter material to a desired packing density wherein the canister has a fill opening through which the particulate filter material is introduced into the canister, the method comprising the steps of: orienting the filter canister with the fill opening facing upwardly; introducing the particulate filter material through the fill opening; and vibrating the filter canister at a frequency and amplitude, and for a time until the desired packing density is reached; wherein the vibrating step includes vibrating the filter canister in a vertical direction with a vertical vibrational frequency that includes imparting a maximum downward vertical acceleration to the filter canister; wherein the vibrating step includes vibrating the filter canister in a horizontal direction with a lateral vibration frequency, wherein the filter canister has maximum positive and negative accelerations in the horizontal direction; wherein the horizontal vibration frequency is in phase with the vertical vibrational frequency and is half its value.