04257998 is referenced by 63 patents and cites 12 patents.

A method of making a panel for installation in the high velocity air flow region of an engine nacelle and other applications requiring sound absorbing material and increased air frame strength. The panel utilizes a single layer of either a metallic or nonmetallic cellular core with a solid or perforated septum disposed internally therein. The septum may have a planar or nonplanar configuration within the individual cells of the core thereby providing means for reducing the noise level of various sound frequencies created by a jet engine or any other sound producing devices for that matter. The planar or nonplanar septum provides structural stabilization and/or vibration dampening to a bonded sandwich assembly. The panel may also be used in strengthening air frame construction and other applications besides sound attenuating panels.

Title
Method of making a cellular core with internal septum
Application Number
901337
Publication Number
4257998
Application Date
September 11, 1978
Publication Date
March 24, 1981
Inventor
Marlyn F Harp
Winfield
KS, US
M Dean Nelsen
Goddard
KS, US
James L Diepenbrock Jr
Wichita
KS, US
Agent
Edwin H Crabtree
Assignee
The Boenig Company
WA, US
IPC
B29C 17/08
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