Methods and apparatus for plugging cells of ceramic structures and honeycomb filters
US11986975B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2019 |
| Grant date | May 21, 2024 |
| Priority date | — |
| Expiry date | Apr 19, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N3/2828
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for plugging a subset of cells of a honeycomb structure that includes: covering a first end face of the honeycomb structure with a mask that comprises a body and a plurality of openings, wherein the plurality of openings of the mask is coincident with a plurality of cells of the honeycomb structure; providing a plenum, a movable plunger and a flow plate; positioning a cylinder between the honeycomb structure and the plenum; dispensing a plugging material into the plenum; moving the plunger toward the flow plate with a force to push the plugging material through the flow plate into the cylinder, the moving generating a pressure in the plenum and the cylinder that forces the plugging material through the mask into the plurality of cells of the honeycomb structure to a predetermined depth; and determining the pressure within the cylinder during the moving of the plunger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.