Apparatus and method for dosing a fluid formulation into a polymeric material
US12311586B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2021 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Mar 16, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2995/002
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Apparatus 2 for dosing a liquid colour formulation into polymer includes a weighing platform 4 which is supported on a pair of load cells 6 which are, in turn, supported on a base 8. A reservoir 12 contains liquid colour formulation 14. A pump 16 is arranged to pump liquid formulation, via a tube 20, to an extruder or injection moulding machine. Above inlet 24 is a delivery pack 26 which includes a bag-in-a-box arrangement 28. The delivery pack 26 includes a transfer pump 36 associated with an outlet of the receptacle 32. A transfer pump motor 38 is arranged to be engaged with the transfer pump 36 and operated so that liquid formulation can be pumped from the receptacle 32 into reservoir 12 across an air gap 13 defined between the transfer pump 36 and the inlet 24 of reservoir 12. There is no pipe, tube or other conduit through which liquid formulation passes on travel between delivery pack 26 and reservoir 12.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.