Strengthened Folder With Inserted Elements and System for Element Interchangeability
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United States of America Patent
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Apr 25, 2017
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Feb 20, 2007
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Abstract
A folder system with an accordion spine 16, and a method of making same is disclosed. The folder may have a plurality of insert elements 52, 60 either at manufacture or by a stub system which are bound into the spine at the valleys 32 of the web which forms the spine. The web is made of outer zig-zag web 40, with the inner web 42, 44, 46 joining adjacent insert elements and the outer web, to create a strong spine of web and inserts.
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