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US 5,697,722 AGranted
Ring binder mechanism having spring closure mechanism
AssigneeHerta Hladik
InventorsHerta Hladik, Hans Igler
Life of this patent
Estimating the term…
Abstract
A ring binder mechanism has a base plate that may be mounted in a binder or the like and preferably two spring closure mechanisms that each comprise a filing pin and a tube perpendicularly secured to the base plate. A longitudinally sliding and rotary closing bow is mounted in the tube to open and close the mechanism. A pressure spring is mounted between a disk-shaped bulge of the closing bow and a closed end of the robe to generate a closing force in the direction of the filing pin.
Claims5
Ring binder mechanism comprising:
- a base plate mountable in a binder or ring binder,
- at least one spring closure mechanism including a filing pin and a tube,
- said filing pin and said tube being seperatedly secured to the base plate in a perpendicular orientation,
- a closing bow longitudinally slidable and rotatable with respect to said tube to open and close the mechanism,
- the tube having an inner diameter greater than a diameter of the closing bow,
- one end of the tube located opposite to the base plate being closed, the closed end being provided with a bore through which the closing bow is guided and whose diameter corresponds to the outer diameter of the closing bow,
- the closing bow further including a disk-shaped bulge located at an end of the closing bow positioned within the tube, a diameter of the disk-shaped bulge corresponding to an inner diameter of the tube, and
- a pressure spring located in said tube, mounted between the disk-shaped bulge and the closed end of the tube to generate a bias force on the disk-shaped bulge in a direction of the base plate for forcing an opposite end of the closing bow into contact with the filing pin.
5 more elements
Dependencies are inferred from the claim text.