Apparatus for cleaning planar objects
Abstract
Abstract RELATIVELY LIGHTWEIGHT OBJECTS SUCH AS ELECTRONIC CIRCUIT BOARDS MAY BE CLEANED BY ALLOWING THE OBJECT TO PASS BETWEEN PAIRS OF OPPOSED CYLINDRICAL DRIVE BRUSHES THAT ARE ROTATED AT A SPEED SUCH THAT THE OBJECT IS DRIVEN IN A PREDETERMINED DIRECTION AT A SPEED EQUAL TO THE TANGENTIAL VELOCITY OF AN OUTER EDGE PORTION OF EACH BRUSH. THE DRIVE BRUSH BRISTLES APPLY CLEANING FORCES SUBSTANTIALLY PERPENDICULAR TO THE SURFACE OF THE OBJECT. IN ADDITION, INDEPENDENTLY DRIVEN PAIRS OF OPPOSED CYLINDRICAL SKIMMING BRUSHES MAY BE PROVIDED BETWEEN CERTAIN PAIRS OF THE DRIVE BRUSHES ALONG THE PATH TRAVELED BY THE OBJECT, AND THE SKIMMING BRUSHES ARE ROTATED IN A DIRECTION TENDING TO AID THE MOVEMENT OF THE OBJECT ALONG THE PATH IN THE PREDETERMINED DIRECTION AND AT A SPEED SUCH THAT THE TANGENTIAL VELOCITY OF AN OUTER EDGE PORTION OF EACH SKIMMING BRUSH SUBSTANTIALLY EXCEEDS THE SPEED OF THE OBJECT, THEREBY APPLYING TANGENTIAL CLEANING FORCES. CLEANING OF THE OBJECT IS IMPROVED WHEN CARRIED OUT IN THE PRESENCE OF A CLEANING SOLVENT.
Inventors
- 👤 William R Hamilton
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |