04233790 is referenced by 57 patents and cites 10 patents.

A one piece extrusion for use in the manufacturing of structures including structures such as frames, wall partitions, display boards, signs, covers, filters, screens, mesh, window sash and window-like structures, such window frames, window sash and other structures and methods of making such structures and especially of making window sash. The extrusion comprises a locking element of which the main portion is formed of a substantially rigid plastic material, which is provided with spaced integral, flexible projections extending angularly outwardly from the stem of the element, and which is adapted to be inserted in a channel formed in the entire periphery of a rectangular frame so as to hold a flexible translucent, transparent, or opaque sheet locked in the channel. The flexible sheet is forced into the channel. In so doing the flexible sheet is stretched to give a smooth appearance and is locked in the channel and sealed by the extrusion.

Title
Extrusions and building structures
Application Number
807492
Publication Number
4233790
Application Date
January 8, 1979
Publication Date
November 18, 1980
Inventor
David F Meadows
Milton
WV, US
Agent
Sidney W Millard
Assignee
DoNel Corporation
OH, US
IPC
A47H 13/00
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