Article coating method
Abstract
Abstract AN APPARATUS AND METHOD FOR COATING OR OTHERWISE TREATING THE SURFACED OF SMALL ARTICLES BY PASSING THE ARTICLES THROUGH A FLUIDIZED MEDIUM. IN ONE FORM, A FLUIDIZED BED OF PARTICLES OF THERMOPLASTIC COATING MATERIAL IS GENERATED BY PASSING A GAS UPWARDLY THROUGH A COLUMN SURROUNDED BY A JACKET OR HOUSING AND INTRODUCING PARTICLES OF THERMOPLASTIC MATERIAL INTO SAID COLUMN WHICH PARTICLES BECOME FLUIDIZED. THEREAFTER, ARTICLES SUCH AS METAL PARTS WHICH HAVE BEEN PREHEATED TO A TEMPERATURE ABOVE THE MELTING RANGE OF THE PLASTIC RESIN SO FLUIDIZED, ARE INTRODUCED INTO THE TOP OF THE CHAMBER AND ALLOWED TO FALL THROUGH THE FLUIDIZED MASS. AS THEY FALL, THEY INTERSECT PARTICLES OF THE FLUIDIZED MASS WHICH MELT UPON CONTACT WITH THE SURFACE OF THE ARTICLES FORMING A COATING THEREON. DEPENDING UPON THE HEIGHT OF THE COLUMN AND THE DESIRED THICKNESS OF COATING, THE ARTICLES MAY BE EJECTED OR CARRIED UPWARDLY BY A MOVABLE RECEIVING DEVICE LOCATED AT THE BOTTOM OF THE COLUMN WHICH IS ACTIVATED TO EITHER PROPEL THE ARTICLES FROM THE SURFACE THEREOF UPWARDLY INTO THE FLUIDIZED MASS OR TO CARRY THE ARTICLES UPWARDLY INTO THE FLUIDIZED MASS.
Inventors
- 👤 Jerome H Lemelson
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 |