Apparatus and method for selectively coating the inner surface of a hollow body
US4965099A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1989 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Oct 27, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28B11/045
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A fixture for automatically and selectively coating a predetermined area of the inner surface of a hollow body with a liquid, wherein the hollow body has a closed end and an open end with an edge which defines the open end. The fixture is preferably at least partially disposed in a volume of the coating liquid, and comprises a base member, a pressure tube attached to the base member, and in fluid communication with a variable pressure source, and a hollow body support for orienting the hollow body in inverted condition with its open edge partially submerged in the volume of coating liquid. The inverted hollow body thereby provides a closed cavity defined by the closed end of the hollow body and the partially submerged open edge. A preferred embodiment of the fixture further includes a control partition extending upwardly from the base, circumscribing and spaced radially from the pressure tube. The liquid level within the closed cavity formed by the inverted hollow body can hereafter be raised by application of an underpressure to the cavity through the pressure tube, and the uppermost raised level of the liquid is positively limited by the control partition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.