Method and apparatus for applying a surfactant to mold surfaces
US5837314A · kind A · utility
41Cited by
6References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 1995 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | May 1, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2011/0016
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of and apparatus for employing a surfactant which is provided in order to assist in the release from each other of mold components of a multi-part mold employed in the molding of polymeric articles; for instance, such as a hydrophilic contact lens, upon completion of the molding process for the polymeric articles. The surfactant is applied in the form of a film or coating on surface portions of one of the mold components in order to facilitate the disengagement between the mold components during demolding, and the removal of excess polymeric molding material adhesively deposited on surfaces thereon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.