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Library ／ Stationery ／ Soft close ring binder mechanism with mating ring tips
Public domain · Fee lapsed

Soft close ring binder mechanism with mating ring tips

US-8573876-B2

Abstract

A ring binder mechanism for retaining loose-leaf pages securely holds closed ring members together to prevent inadvertent loss of pages retained by the mechanism. The mechanism comprises a housing supporting two hinge plates for pivoting motion to open and close paired ring members mounted on the plates. Free ends of the paired ring members have interlocking configurations that securely join together when the ring members close. The configurations prevent misalignment of the closed ring members in all directions transverse to longitudinal centerlines of the ring members. The mechanism also includes locking elements that interact with the hinge plates to block their pivoting motion when the ring members are closed. This holds the free ends of the closed paired ring members together so that the interlocking configurations of the ring members remain interengaged.

Patent figures（8）

US-8573876-B2 fig 1
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Legal status & events

2004-03-15
Priority date established
2005-03-15
Application filed by World Wide Stationery Manufacturing Co Ltd
2005-06-09
Assignment of assignors' interest recorded
2005-09-22
Publication of US20050207826A1
2013-11-05
Application granted; Publication of US8573876B2
2031-12-06
Adjusted expiration date (legal-status critical)
Notice

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A verification result, not a legal conclusionPatent legal status may change due to fee reinstatement, family members, or jurisdiction. The official record governs.
Obtain FTO clearance before useBefore any make, use, or sell decision, obtain a Freedom-to-Operate analysis from a qualified patent attorney.