The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

Development Of A Flexible Magnetic Pressure Seal

Report Number: AMRL TR 69-1
Author: Olson, M. W.
Author: Fowkes, R. A.
Corporate Author: Uniroyal Inc Wayne N J Research Center
Laboratory: Aerospace Medical Research Laboratory
Date of Publication: 1969-02
Pages: 26
Contract: F33615-67-C-1210
Project: 7164
Task: 716411
AD Number: AD0691032

The application of flexible magnetic rubber seals to slide fasteners to form pressure tight closures was investigated. Several configurations were fabricated using flexible permanent magnet strips of neoprene rubber loaded with barium ferrite. In an attempt to increase attractive forces, neoprene rubber was loaded with carbonyl reduced iron particles to increase magnetic permeability, but the material lacked adequate tear strength. Excess bulk and lack of flexibility constitute the most serious deficiencies. Leakage also was a difficult problem particularly with circumferential closures where bending caused rippling of the seal lips. The final and most successful design utilized magnetic rubber blocks cemented to the back of a flexible rubber strip for the inner seal. Further development will be required prior to application of magnetic seals to closures.

Lockheed Martin Missiles & Fire Control
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