Shingle granule valve and method of depositing granules onto a moving substrate
US6610147B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 2001 |
| Grant date | Aug 26, 2003 |
| Priority date | — |
| Expiry date | Aug 31, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05D2401/32
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Apparatus for depositing granules onto a substrate includes a hopper for containing granules, the hopper having a discharge slot, and a reciprocating gate mounted for rotation across the slot to open and close the slot. A method of depositing granules onto a moving substrate includes providing a hopper for containing granules, where the hopper has a discharge slot. A gate is moved across the slot to open and close the slot. When the slot is open granules fall from the hopper, and when the slot is closed granules are prevented from falling from the hopper. The method further includes detecting the speed of the substrate, and controlling the extent of opening of the slot by the gate to meter the granules falling from the hopper in response to the speed of the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.