Patent ID: 7922951

Claim:
A method for plugging a subset of cells of a honeycomb structure, comprising: covering a first end face of the honeycomb structure with a mask that comprises a body having an outer edge and a plurality of openings extending therethrough, the outer edge of the body extending outwardly of at least a portion of an outer edge of the first end face; providing a film material having an outer edge that also extends outwardly of at least a portion of the outer edge of the first end face; providing a plug of material upon the film material; sealing the mask and the film material to one another about at least a portion of an outer periphery of the mask and at least a portion of an outer periphery of the film material, with the plug of material being disposed between the mask and the film material; and applying a force to the film material forcing the plug of material through the mask and into the subset of cells.