Metering apparatus for metering and delivering fluid or pasty substances and use of said metering apparatus
US4974754A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 1988 |
| Grant date | Dec 4, 1990 |
| Priority date | — |
| Expiry date | Oct 31, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J4/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A metering apparatus has a metering chamber which has at least one boundary surface in the form of a flexible diaphragm. The diaphragm is operatively connected to an actuating device so that the volume of the chamber for metering and deliveirng the substance can be varied. An inlet opening and an outlet opening in the metering chamber can preferably be closed off directly by the diaphragm, more specifically by means of closure devices arranged in the region of those openings. The metering apparatus is particularly suitable for die bonders for the delivery of a bonding agent onto a substrate which is then equipped with electronic components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.