Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Reexamination Certificate
2011-07-12
2011-07-12
O'Hern, Brent T (Department: 1783)
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
C139S38300A, C156S164000, C156S194000, C156S304600, C428S107000, C428S213000, C428S364000, C429S144000, C442S135000
Reexamination Certificate
active
07976932
ABSTRACT:
A ballistic resistant panel including a strike face portion and a backing portion. The strike face portion includes a plurality of interleaved layers of non-fibrous ultra high molecular weight polyethylene tape. The backing portion includes a plurality of interleaved layers of cross-plied fibers of ultra high molecular weight polyethylene. The entire stack of interleaved layers is compressed at high temperature and pressure to form a ballistic resistant panel having a strike face on one side. It has been found that ballistic resistance increases as the weight ratio of the strike face portion with respect to the backing portion decreases. A composite panel having a strike face Tensylon tape with at most 40% of the total weight of the panel exhibits improved ballistic resistance properties as compared to a monolithic structure of strictly interleaved layers of cross-plied high modulus fibers.
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patent: 2010/0003452 (2010-01-01), Jongedijk et al.
Harding Kenneth C.
Johnson Erik
Lyons Fielder Stanton
Mears Jeffrey A.
Mitchell Joseph
BAE Systems Tensylon H.P.M, Inc.
O'Hern Brent T
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