Air accelerator dosing tube
US9963253B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 2012 |
| Grant date | May 8, 2018 |
| Priority date | — |
| Expiry date | Jun 2, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B9/02
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An air accelerator dosing tube for a form/fill/seal machine used to package fine cut tobacco material includes an axially-adjustable annular venturi communicating with the particulate material passage. A lining of polyether ether ketone optionally covers surfaces exposed to the particulate material. A metering assembly for delivering predetermined quanitites of particulate material at predetermined time intervals may also be fabricated from polyether ether ketone. Each dosing tube is adapted for calibration by adjustment of the annular venturi to produce a predetermined force at a predetermined stand-off distance. In operation, consistent simultaneous operation of multiple dosing tubes, each of which has been calibrated, gives substantially uniform deposit of particulate material in pouch-type packages. The particulate material may include finely cut tobacco in addition to humectants, flavorants, and other tacky substances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.