Process of producing plastic plates with wells by placing a film on a mold and applying hot gas
US5447679A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1993 |
| Grant date | Sep 5, 1995 |
| Priority date | — |
| Expiry date | Jan 15, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C51/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process serves for producing a plate comprising at least one well having ts opening facing upwards, for receiving chemical and/or biochemical and/or microbiological substances. The process, wherein the wells are made in the plate with the aid of a molding die, comprises the steps of: PA1 a) Applying a plastic film, which is deformable by the action of heat, on a molding block which serves as a molding die and which has the negative shape of the wells to be formed; and PA1 b) subjecting the plastic film, for a predetermined period of time, to the action of a hot gas flow of a predetermined first temperature, the gas flow impinging upon at least an area of the plastic film covering one of the recessed portions, heating up this area and pressing it into the recessed portion so that it comes to lie flat against the latter's inner wall which is smooth throughout.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.