Spin coater
US4895102A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1987 |
| Grant date | Jan 23, 1990 |
| Priority date | — |
| Expiry date | Oct 29, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D11/00538
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A spin coater suitable for spin coating spectacle lens molds with polymerizable coating composition. The spin coater includes a drawer which rotatably mounts at least one chuck thereon, which drawer is slidable between a front and rear position within a housing to sequentially allow application of a coating by the spinning chucks in the front chamber of the housing, followed by polymerization thereof in the rear chamber. Each chuck of the spin coater is provided with a mold seat defined by a ledge and adjacent lip, the lip automatically centering the mold in the seat axis by virtue of its dimensions in relation to the mold. The chuck also has a lengthwise resilient vacuum conduit, preferably in the form of a bellows, which has an open end which can sealingly engage against a seated mold, such that when a vacuum is applied through the vacuum conduit the mold is urged firmly against the ledge of the mold seat. A method of producing a coated spectacle lens, preferably using such a spin coater, involves providing two different abrasion resistent coatings on front and rear molding surfaces of a form, which coatings are only partially polymerized. The form is then filled with resin which…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.