Apparatus for powder spraying
Abstract
Abstract AN ELONGATED SQUARE-SHAPED FLUIDIZING CASE CONTAINS AN OUTLET FOR THE POWDER TO BE SPRAYED, A VERTICAL WEIR BOARD AND A HORIZONTAL POROUS RECTIFYING BOARD. AN AIR CHAMBER FOR INTRODUCING COMPRESSED AIR INTO A POWDER LAYER IS LOCATED BELOW THE RECTIFYING BOARD, AND A FLUID CHAMBER COMMUNICATING WITH THE OUTLET IS PROVIDED ABOVE THE RECTIFYING BOARD. A DEVICE FOR FEEDING A FIXED AMOUNT OF POWDER CONTINUOUSLY TO THE FLUID CHAMBER IS CONNECTED WITH THE FLUIDIZING CASE. WHEN THE POWDER IS FED INTO THE FLUID CHAMBER, THE AIR BLOWING FROM THE AIR CHAMBER FORMS A FLUIDIZED BED OF POWDER. THE POWDER ELUTRIATED FROM THE FLUIDIZED BED IS EJECTED BY THE AIR THROUGH THE OUTLET TO BE SPRAYED UPON THE SURFACE OF THE OBJECT BEING TREATED.
Inventors
- 👤 Shiro Saito
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |