Method for locating the surface of a polymer particle bed

Details Method for locating the surface of a polymer particle bed Method for locating the surface of a polymer particle bed

2009-07-28

2010-06-22

Sotomayor, John B (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Determining distance

Material level within container

C342S175000

Reexamination Certificate

active

07741993

ABSTRACT:
A method for determining the level of a bed of polymer particles in a vessel comprising providing water wet polymer particles and employing a guided wave radar probe unit carrying a pair of radar active probes spaced from the guided wave radar probe unit by a radar inactive member, and positioning the radar inactive member so that polymer particles that are introduced into the vessel first encounter the radar inactive member.

REFERENCES:
patent: 5136299 (1992-08-01), Edvardsson
patent: 6825798 (2004-11-01), McGregor
patent: 7259712 (2007-08-01), McKeen et al.
patent: 2003/0169197 (2003-09-01), McGregor
patent: 2007/0008212 (2007-01-01), Serban et al.

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