The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 20, 2021
Filed:
Sep. 09, 2016
Colormatrix Holdings, Inc., Wilmington, DE (US);
Brian Jones, Merseyside, GB;
David Whitehead, Merseyside, GB;
Ian Campbell, Merseyside, GB;
Harry Baker, Merseyside, GB;
COLORMATRIX HOLDINGS, INC., Wilmington, DE (US);
Abstract
Injection apparatus for injecting a liquid formulation into a molten polymer at high pressure includes a reservoir containing liquid formulation at ambient temperature and pressure which is arrange to flood-feed pump bodyof a first progressing cavity pump (pcp) (). The first pcp () is driven by motor () and is arranged to accurately meter the liquid formulation into a second pcp () which is downstream of the first pcp and is arranged to increase the pressure of the liquid formulation by 200 bar or more. Downstream of pump () is a delivery valve () arranged to control passage of liquid formulation, via outlet (), into pressurised molten polymer stream () which is present in an extruder ().