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Patents - Plastic Nettings
Patents were crucial to the growth, development and success of
the Plastic Nettings Industry. Mercer's extruded diamond net business inspired
hundreds of people and companies around the world resulting in hundreds of
nonwoven netting patents - some of them actually worked!
These are the basic patents that formed the business.
US2,919,467 Mercer - 1/5/60 - Basic Diamond Net Process*
It shows the basic Diamond Net Concepts. Many new and improved
inventions followed. This was the beginning of Netlon's international
licensing. Any licensee was bound to turnover any improvements to Netlon.
*US Patents for Mercer and Hureau were first patented in their respective
country. These shown here are the US versions.
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US3,252,181 Hureau - 5/24/66 - Basic Square Net Process
The basic concepts for extruded square nets are represented. This
inspired even more patents. Rical began licensing internationally in about
1962. Rical licensees were required to license back any improvements.
Wood Conversion licensed this patent in 1966. The process continues to
be used by Conwed Plastics to this day.
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US3,917,889 Larsen - 11/4/75 - Basic Servo Control for
Square Net
This closed-loop control system was used to attain state-of-the art extrusion
speeds.
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US4,123,491 Larsen - 10/31/78 - High Strand Count Square
Net Process
This describes the extrusion and orientation of high strand count Square Net.
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US4,152,479 Larsen - 5/1/79 - Square Net Orientation
This describes the extrusion and orientation of high strand count Square Net.
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