Production of shaped articles
Abstract
Abstract IN THE MANUFACTURE OF ARTICLES FROM FIBROUS MATERIALS AND A BINDER THEREFOR IN PARTICULATE FORM, AN ELECTROSTATIC CHARGE IS IMPARTED TO THE FIBRES AND BINDER PARTICLES WHICH ARE ATTRACTED TO AND COLLECTED ON A FORMER OR MOULD WHICH IS EARTHED OR CHARGED WITH A POLARITY OPPOSITE TO THAT OF THE CHARGED PARTICLES TO FORM A LAYER OF THE REQUIRED SHAPE AND THICKNESS. THE LAYER IS TREATED TO CAUSE THE FIBRES TO BOND TOGETHER TO FORM A SELFSUPPORTING ARTICLE BEFORE THE RESULTANT ARTICLE IS REMOVED FROM THE FORMER, IN THOSE CASES WHERE REMOVAL TAKES PLACE. IN SOME CASES THE FORMER MAY ITSELF FORM PART OF THE ARTICLE. THE METHOD OF THE INVENTION IS PARTICULARLY SUITABLE FOR THE MANUFACTURE OF ARTICLES FROM ASBESTOS AND PORTLAND CEMENT AND FROM ABESTOS AND BITUMEN, BUT OTHER FIBRES AND BINDERS MAY ALSO BE USED.
Inventors
- 👤 Stanley Richard Barker
- 👤 Frank Philip Packman
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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |