Ring binder, has flexible back, and file folder base and file folder cover that are connected with each other by flexible reinforcement made of leather or textile in fold-away manner, where ring binder is made from wood
摘要
<p>The binder has a flexible back, and a file folder base (1) and a file folder cover (2) that are connected with each other by a flexible reinforcement (6) made of leather or textile in fold-away manner. The reinforcement is formally held by a central rib (3) and joint ribs (4) made from wood. The central rib varies in width between 4 and 59 millimeters, where the ring binder is made from wood. The file base and the file cover are made from broad-glue solid wood with a lamella width between 40 and 60 millimeters and a wood strength of 5 to 7 millimeters.</p>
