Drag soldering method and apparatus for printed wiring boards
US4848644A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 1988 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Jul 13, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/1509
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention is an improved drag soldering machine for printed wiring boards (PWB) for providing a uniform vertical velocity at the point of separation between the solder and the PWBs. The improved drag soldering machine has a molten solder bath, an entry guide for directing the PWB to a horizontal position partially submerged in the solder bath, a drag guide for horizontally directing the PWB across the solder bath, an exit guide for separating the PWB from the solder bath by directing the PWB up and away from the solder bath and a transport means for advancing the PWB in the guide means, wherein the improvement comprises an exit guide providing an approximately uniform vertical velocity at the point of separation between the PWB and the solder bath thereby promoting a uniform soleder distribution over the length of the PWB.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.