Patent ID: 7070728

Claim:
A method for plugging a subset of cells of a honeycomb structure having a plurality of open end cells extending therethrough, comprising: providing at least one cylindrically shaped first roller and a shaft member for axially supporting the first roller, the first roller including an engagement surface having a plurality of outwardly extending teeth spaced along a length and about a circumference of the at least one first roller, wherein the teeth are spaced so as to engage a first subset of a total number of cells exposed on a first end of a honeycomb structure, the first roller being axially shiftable along a length of the shaft, thereby allowing the first roller to float along the shaft and align with the first subset of cells; and rolling the engagement surface of the at least one first roller across the first end of the honeycomb structure with the teeth extending into the first subset of cells, thereby deforming the first end of the honeycomb structure and plugging a second subset of the total number of cells substantially different from the first subset of cells.