Method for treating cup-shaped workpieces
US4042416A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1976 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | Mar 17, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB08B3/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for treating cup-shaped workpieces in which the workpieces are positioned within a shape-conforming chamber formed with an outlet port in the base thereof and a conforming nozzle is positioned within the interior of the workpiece in close clearance-spaced relationship. The nozzle is provided with an axial port for discharging a high-pressure treating fluid against the central portion of the interior bottom surface of the workpiece, causing a high-speed radial outward flow therealong and thence axially outwardly along the interior wall surfaces of the workpiece. Upon reaching the open end of the workpiece, the direction of flow is reversed and is directed axially along the exterior wall surface of the workpiece, and upon passing the bottom edge thereof, the fluid is deflected in impinging relationship against the outer bottom surface, whereafter it is discharged through the outlet port and is recovered for reuse. The method further include the steps of discharging a plurality of individual treating fluids in sequentially-phased relationship separated by intervening purging steps so as to effect a plural treatment of the surfaces of cup-shaped workpieces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.