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Publication numberUS3612709 A
Publication typeGrant
Publication dateOct 12, 1971
Filing dateJun 3, 1969
Priority dateSep 26, 1968
Also published asDE1932490A1
Publication numberUS 3612709 A, US 3612709A, US-A-3612709, US3612709 A, US3612709A
InventorsEitaro Miyamoto
Original AssigneeKing Jim Co Ltd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Looseleaf binder
US 3612709 A
Abstract  available in
Images(2)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

United States Patent Eitaro Miyamoto Tokyo, Japan 830,066

June 3, 1969 Oct. 12, 1971 King Jim Co., Ltd. Tokyo, Japan Sept. 26, 1968 Japan Inventor Appl. No. Filed Patented Assignee Priority LOOSELEAF BINDER 3 Claims, 8 Drawing Figs.

U.S. Cl 402/22, 402/8, 402/64 Int. Cl B42f 3/02, 1342f 13/30 Field of Search 402/19, 21 20, 22, 8, 64, 60, 61, 68; 281/1, 19, 37.5

[56] References Cited UNITED STATES PATENTS 2,891,554 6/1959 Foster 402/64 687,941 12/1901 Radford et a1. 402/22 828,974 8/1906 Schmidmer 402/8 1,670,396 5/1928 Wood 281/19 R 3,087,498 4/1963 Vogel 402/22 Primary Examiner-Robert W. Michell Assistant Examiner-R. P. Dyer Att0rney--Young & Thompson ABSTRACT: A looseleaf binder formed integrally of synthetic resin having proper toughness and elasticity which comprises a cover plate provided in its internal surface with at least two or more posts, a base plate provided on its inner surface facing the inner surface of the cover plate with at least two or more sockets into which said posts are fitted disengageably and a flexible connecting means for joining the cover plate with the base plate symmetrically.

PATENTEDnm 1 2 197i sum 1 OF 2 1 2.7 09

FIG.2

ATTORNEY PATENTEU [JCT 12 I97! SHEET 2 OF 2 3, 612 709 FIG.7

INVENT OR Jan-d6 ATTORNEY LOOSELEAF BINDER BACKGROUND OF THE INVENTION This invention relates to an improvement in a looseleaf binder for sheets which comprises a cover plate provided with at least two or more posts and a base plate provided with at 7 SUMMARY OF THE INVENTION It is, therefore, a general object of the invention to obviate the above disadvantages and to provide a novel binder of simple construction free from any holding means which may be fabricated by mass production in a short time at reduced cost.

The principal object of the invention is to provide a new binder comprising a cover plate which is provided in its internal surface with at least two or more posts, a base plate which is provided in its internal surface facing with the internal surface of the cover plate with at least two or more sockets into which said posts are disengageably fitted and a flexible connecting means for joining the cover plate with the base plate symmetrically, wherein all elements are formed integrally of synthetic resin having proper toughness and elasticity.

Another object of the invention is to provide a new binder comprising a cover plate which is provided along its outer edge with at least two or more posts and along its opposite inner edge with two or more curved edges, a base plate which is provided along its outer edge with at least two or more sockets and along its opposite inner edge curved ridges that nest in said curved edges, and a flexible coupling means for connecting the cover plate with the base plate symmetrically, wherein all elements are fonned integrally of synthetic resin having proper toughness and elasticity.

BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the invention will appear from the following description of the representative embodiments disclosed in the accompanying drawings in which the same reference numerals designate the same or similar parts throughout the drawings:

FIG. I is a perspective view of one embodiment of a binder according to the invention in opened relation;

FIG. 2 is a perspective view of the binder in closed relation;

FIG. 3 is a transverse sectional view taken along the line lIllII of FIG. 2;

FIG. 4 is a perspective view of the binder according to another embodiment in opened relation;

FIG. 5 is a perspective view of still another embodiment of the binder in opened relation;

FIG. 6 is a transverse sectional view in closed relation taken along the line VI-VI of FIG. 5;

FIG. 7 is a pictorial view showing the attachment of the binder shown in FIG. 5 to the file folder; and

FIG. 8 is a pictorial view similar to FIG. 7 but showing the attachment of two binders to the left side edge and the right upper edge of the file folder.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1 to 3, the binder according to the invention comprises a cover plate 1, a base plate 2 and flexible connecting means 3 and'all elements are integrally formed of synthetic resin having proper toughness and elasticity such as polypropylene.

On an inner surface of the cover plate 1 and near its outer edge are provided two posts 4 of substantially frustoconical shape. On an inner surface of the base plate 2 and near its outer edge are provided two sockets 5 having generally cylindrical inner surfaces and two apertures 6 for securing the base plate 2 to binder covers. The inside diameters of the sockets 5 are somewhat smaller than the outer diameters of the frustoconical posts 4 at their bases so that the posts 4 when fitted into the sockets 5 are kept in tight engagement with the interior walls of the sockets 5 owing to the friction of the synthetic resin. Accordingly, it will be appreciated that the binder according to the invention does not require any special holding means for-keeping the posts in engagement with the sockets.

The posts 4 may be provided on the base 2, while the sockets 5 may be provided on the cover plate I or they may be arranged alternately. Further, the numbers of the posts and the sockets may be increased optionally according to the purpose.

The flexible connecting means 3 for joining the cover plate 1 with the base plate 2 symmetrically comprises several con necting pieces 7 which when the cover plate I and the base plate 2 are to be closed are bent as shown in FIGS. 2 and 3, so that when the posts 4 are manually disengaged from the sockets 5 the cover plate 1 is lightly opened outwardly under the influence of the restoring force of the connecting pieces 7.

The connecting pieces 7 at their inner middle portion may be provided with grooves or they may be replaced by a continuous connecting band 8 provided with ridges and grooves as shown in FIG. 4 so that an increased restoring force is exerted by the connecting band 8 when the cover plate I is disengaged from the base plate 2 and, accordingly, the cover plate 1 is vigorously opened outwardly.

In FIGS. 5 and 6, the cover plate 1 at its inner edge and between the connecting pieces 7 is provided with several edges 9 which are somewhat curved inwardly.

On the other hand, the base plate 2 at its inner edge and between the connecting pieces 7 is provided with the ridges 10 of the same number as edges 9. Further, the top portions of the ridges 10 are rounded so that the rounded top portions come into tight contact with the curved portion of the edges 9. In operation, when the cover plate 1 is disengaged from the base plate 2, the edges 9 are bent about the rounded tops of the ridges 10 due to the resilience of the cover plate so that the cover plate I is vigorously opened outwardly on account of the leverage around the rounded top of the ridges 10.

The binder thus constructed according to the invention is usually attached to the file folder I l as shown in FIG. 7. However, it will be more convenient for the user when two binders are attached to the right upper edge and left side edge of the same file folder as shown in FIG. 8 so that the recorded papers at the right side may be flled seriatim to the left side of the file.

According to the invention, the binder does not require any intricate holding means for keeping the posts in engagement with the sockets and, accordingly, it may be operated with ease. Further, the binder as a whole is formed integrally of synthetic resin by mass production at reduced cost.

It should be understood that the invention is not limited to the particular embodiments shown and described herein, but that various changes and modifications may be made without departing from the scope of this novel concept as defined by the following claims.

What is claimed is:

l. A looseleaf binder of synthetic plastic material and comprising a base plate, a cover plate, a flexible member hingedly connecting the base plate to the cover plate, at least two connecting assemblies each comprising an interengaging post and socket, the post being mounted on one of the said plates and the socket on the other of said plates, the length of the socket being sufficient to receive a major part of the length of the post, the base plate and the cover plate having outer and inner edges, the flexible member extending between the inner edges, the posts and sockets being situated near the outer edges, the binder having an elongated ridge located along the inner edge of one of the plates and extending generally perpendicular to said plate, and an elongated curved edge extending along the inner edge of the other plate such that, when the posts and sockets are interengaged, the top of the ridge nests in said curved edge.

2. A binder according to claim 1, wherein at least two flexible members extend between the base plate and the cover

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3728036 *Nov 17, 1970Apr 17, 1973Reliure Ind StdBinding for perforated leaves made up of a singleplastic piece
US3995961 *Dec 27, 1971Dec 7, 1976Jerome S. SerchuckRing binder
US4056326 *Aug 6, 1975Nov 1, 1977Crawford Industries, Inc.Loose leaf binder
US4307972 *Aug 6, 1979Dec 29, 1981Errichiello DLooseleaf books with plastic posts
US4761091 *Apr 28, 1987Aug 2, 1988King Jim Co., Ltd.Binding device
US4878776 *Mar 9, 1989Nov 7, 1989George OrlandiniBinder for telephone directories and the like
US5002416 *May 7, 1990Mar 26, 1991Serzen Russell DCover spacer for binders
US5320456 *Nov 23, 1993Jun 14, 1994With Jere LRatchet binding device for multiple sheets of paper
US6099187 *Jun 5, 1999Aug 8, 2000Univenture, Inc.Storage device
US6200057Jun 2, 2000Mar 13, 2001Univenture, Inc.Storage device
US6514000Mar 13, 2001Feb 4, 2003Univenture, Inc.Storage device
US7011210 *Apr 16, 2002Mar 14, 2006Fuji Photo Film Co., Ltd.Magnetic tape cassette case
US7399136Jan 6, 2006Jul 15, 2008Staples The Office Superstore LlcMolded binder
US7524127Dec 12, 2005Apr 28, 2009Staples The Office Superstore, LlcRing binder mechanism
US7527449Dec 12, 2005May 5, 2009Staples The Office Superstore, LlcRing binder mechanism
US7708487 *Apr 15, 2004May 4, 2010Leibman Ellis HBinder spine
US7708513Aug 4, 2006May 4, 2010General Binding CorporationBinding elements and plurality of binding elements particularly suited for automated processes
US7717638Feb 17, 2006May 18, 2010Meadwestvaco CorporationRefillable notebook
US8517196 *May 17, 2011Aug 27, 2013Chun Yuan ChangPositioning structure for a clipboard
US8708302 *Jul 27, 2011Apr 29, 2014Stan G. WilderWall calendar holder apparatus
US8864177Nov 20, 2012Oct 21, 2014Esselte CorporationMovable highlight strip
US8876423Oct 18, 2011Nov 4, 2014ACCO Brands CorporationRefillable notebook with release mechanism
US9108453 *Nov 20, 2012Aug 18, 2015R.R. Donnelley & Sons CompanySortable notepad
US9290035Jul 1, 2011Mar 22, 2016ACCO Brands CorporationRefillable notebook with release mechanism
US20020148747 *Apr 16, 2002Oct 17, 2002Fuji Photo Film Co., Ltd.Magnetic tape cassette case
US20040213630 *Apr 15, 2004Oct 28, 2004Leibman Ellis H.Binder spine
US20040240967 *Aug 29, 2002Dec 2, 2004Phillip CrudoBinding elements for binding a wide range of thicknesses of stacks of sheets
US20070031214 *Aug 4, 2006Feb 8, 2007General Binding CorporationBinding elements and plurality of binding elements particularly suited for automated processes
US20080092343 *Apr 28, 2007Apr 24, 2008Juan Carlos UndaPlastic Clip On
US20100226735 *Mar 6, 2009Sep 9, 2010Colin KnightApparatus and method for binding sheets
US20110155617 *Jun 30, 2011Chun Yuan ChangDocument box
US20130129403 *Nov 20, 2012May 23, 2013Esselte CorporationSortable notepad
US20140232099 *Feb 19, 2013Aug 21, 2014Eric Peschan HochreiterBinding system using two binding pieces
USD620977Aug 3, 2010General Binding CorporationBinding element
DE102014101292A1Feb 3, 2014Aug 6, 2015Maximilian R. SeidlBindeclip zur stapelartigen Halterung gelochter Blätter
WO1981000381A1 *Aug 6, 1980Feb 19, 1981D ErrichielloLooseleaf books with plastic posts
WO1991017057A1 *May 2, 1991Nov 14, 1991Serzen Russell DCover spacer for binders
Classifications
U.S. Classification402/2, 402/8, 402/22, 402/64, 402/80.00P
International ClassificationB42F13/28, B42F13/12
Cooperative ClassificationB42F13/28
European ClassificationB42F13/28