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Circular ring loose-leaf binder mechanism

A technology for binders, rings, used in folders, printing, binding, etc., to solve problems such as harmful sudden closing actions, difficulty in opening and closing ring elements, and inconsistencies

Inactive Publication Date: 2003-06-04
WORLD WIDE STATIONARY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, such a large force is also exerted on the ring element as it opens and closes, making opening and closing the ring element difficult and resulting in unwanted snap closing action
Additionally, the clamping force in each ring is inconsistent with the clamping force in the other rings, creating uneven motion and potentially creating gaps in closed rings

Method used

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  • Circular ring loose-leaf binder mechanism
  • Circular ring loose-leaf binder mechanism
  • Circular ring loose-leaf binder mechanism

Examples

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Embodiment Construction

[0026] Referring now to the drawings, and in particular to FIG. 1, a ring binder mechanism for securing loose-leaf pages in accordance with the present invention is indicated generally at 30 . The mechanism 30 includes an elongated plate and three rings, each indicated generally at 34, for securing loose-leaf pages.

[0027] Plate 32 is of elongated rectangular shape with a uniform generally arcuate raised profile with a raised platform 36 in its centre. Plate 32 has a longitudinal axis 38 , two generally opposed longitudinal edges 40 , and two generally opposed transverse ends 42 . A curved bottom edge 44 is formed along the longitudinal edge 40 (FIG. 9). The elongated plate 32 is fabricated from metal or other suitable material of sufficient rigidity to provide a stable mounting for the other components of the mechanism while being light in weight to save material and manufacturing costs. Two holes 46 ( FIG. 2 ) are provided for inserting and attaching mounting posts 48 to...

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PUM

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Abstract

The circular ring loose-leaf binder mechanism for binding loose leaves includes one slender sheet, one hinged sheet and ring elements installed in the hinged sheet and capable of shifting between oneclose position and one open position. One control structure is used to turn the hinged sheet, so that the ring elements are made to shift between the close position and the open position. The controlstructure includes one actuator at one end of the mechanism, one executing strip capable of shifting relatively to the slender sheet and two connecting parts to connect the executing strip to the hinged sheet for operation. The control structure is used to set the mechanism in the ring element-closing locking position optionally.

Description

technical field [0001] This invention relates to book holders for holding loose-leaf pages, and more particularly to an improved mechanism for opening and closing book holders. Background technique [0002] Ring binders are used to secure loose-leaf pages, such as perforated paper, in folders or notebooks. It is characterized by a ring element for holding the paper which can be selectively opened to add or remove paper or closed to hold the paper while allowing them to move along the ring. Typically levers are provided at both ends of the book holder for moving the ring member between the open and closed positions. [0003] A disadvantage of prior art ring binders is that when the ring members close, they snap shut with a strong force which can lead to injury. This strong clamping force is necessary to securely lock the book holder and prevent it from being opened unintentionally when the ring element is fully closed. Unfortunately, such high forces are also exerted on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B42F13/22B42F13/26
CPCB42F13/22B42F13/26
Inventor 郑洪如
Owner WORLD WIDE STATIONARY MFG CO LTD
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