Injector for feeding additives in a polymer melt stream

Fluid sprinkling – spraying – and diffusing – Flow deflecting or rotation controlling means – Unitary deflector with multiple fingers or serrated edges

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C239S424500, C366S167100

Reexamination Certificate

active

06230990

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention concerns an injector for feeding additives into a polymer melt stream.
2. Summary of the Related Art
Devices for feeding one liquid medium into another are known. U.S. Pat. No. 5,176,448 describes a device for mixing fluid media in which a liquid additive is conveyed through a channel having a 90° deflection to an outlet at the side. The side outlet opens directly into the middle of the countercurrent main stream of another liquid medium directly upstream of a biscuit located inside of the main stream conduit and forming an annular gap with it for the passage of the liquids.
U.S. Pat. No. 4,753,535 describes a device for mixing two liquid media, whereby most of the main stream of the one liquid medium is conveyed through a flow channel containing static mixing elements and arranged at the center of the main stream conduit. At a right angle to the direction of flow, the second liquid medium is fed directly into the flow channel through a lateral feed port.
E. Henglein, Lexikon Chemische Technik [Lexicon of Chemical Technology], 1988, page 267, describes an injector for continuous mixing of two gases, where one component of the mixture is fed centrally into a mixing zone at a high rate while the second gas stream enters the zone through the remaining annular gap. Due to the high flow rate and the difference in flow rates at the point of entry, there is a great deal of turbulence prevailing in the mixing zone.
European Patent Application No. 838,259 describes a device for adding additives to a stream of a highly viscous liquid having one feed element for each additive to be supplied. Each feed element has a feed channel for the additive running across the direction of flow that opens into a feed port of an annular tube sheet within the main stream conduit. The tube sheet serves as additive distributor.
SUMMARY OF THE INVENTION
The present invention comprises an injector for feeding of additives primarily into the center of a polymer melt stream and subsequent feeding of the polymer melt stream and additives into a static mixer where the additives and polymer melt are blended. Preferably, it is possible to mount the injector in the polymer melt stream relatively easily.


REFERENCES:
patent: 3866886 (1975-02-01), Thorne et al.
patent: 4114195 (1978-09-01), Dirksing et al.
patent: 4753535 (1988-06-01), King
patent: 5176448 (1993-01-01), King et al.
patent: 5683632 (1997-11-01), Shimizu et al.
patent: 92 225 (1972-09-01), None
patent: 39 30 709 A1 (1990-01-01), None
patent: 0 838 259 A1 (1998-04-01), None
patent: 2 530 967 (1984-02-01), None
patent: WO 94/00226 (1994-01-01), None
Henglein,Lexicon Chemische Technik, VCH (Germany) 1988, with English translation of definition of “Injektor” on p. 267.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Injector for feeding additives in a polymer melt stream does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Injector for feeding additives in a polymer melt stream, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Injector for feeding additives in a polymer melt stream will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2546770

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.