Adhesive mix monitor

Details Adhesive mix monitor Adhesive mix monitor

2007-07-24

2007-07-24

Hepperle, Stephen M. (Department: 3753)

Fluid handling

Processes

With control of flow by a condition or characteristic of a...

C073S061420, C073S061710, C137S093000

Reexamination Certificate

active

11024333

ABSTRACT:
A system for measuring a mixture ratio associated with a two-part fluid, at least one of the two parts including conductive particles. The system includes a pair of electrodes, a circuit, and an output. The electrodes are disposed on opposite sides of the two-part fluid and sense the dielectric strength of the fluid. The circuit communicates with the electrodes to sense the dielectric strength and outputs a signal representing the dielectric strength. Preferably, the circuit includes a capacitive bridge, an input for a set-point, and an output for an error signal. Also, the system can include a housing for the electrodes. A timer may also be provided to measure the time elapsed from the beginning of the mixing of the two-part fluid. Preferably, the two-part fluid is an adhesive with aluminum particles that is made from a resin and a hardener. Methods of producing two-part fluids are also provided.

REFERENCES:
patent: 3690340 (1972-09-01), Sipin
patent: 4121767 (1978-10-01), Jensen
patent: 5129415 (1992-07-01), Runyon et al.
patent: 5215253 (1993-06-01), Saidman et al.
patent: 5288769 (1994-02-01), Papageorge et al.
patent: 5985155 (1999-11-01), Maitland
patent: 6374845 (2002-04-01), Melendez et al.
Loctite Aerospace, Hysol EA 9394 Description and information brochure, Jun. 2002; 4 pages, Bay Point, California.
Loctite Aerospace, Hysol Surface Preparation Guide, undated, 2 pages, Bay Point, California.

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