US2004837A - Loose leaf binder - Google Patents

Description

Jul-1e 11, 1935. w. s HEwELl. Er AL 2,004,837-

v Loo-SE LEAF BINQER Filed Nov. 15', 1933 C IWI |HH|I lllll. au@ 1 d e C a wliiw/:lii/llmrl (lllll E 1K nn|||| r InuhL w b W}||/ 1---: -ifJ v v M -J TJ. l V k Y ww lll f omn o o Q r/ g Patented June 11, 1935 UNITED STATES LOOSE LEAF BINDER Wilfrid Shewell and Harold Arthur Cherry,

Northfield, Birmingham, England, assignors to Morland & Impey Limited, Birmingham, England Application November 15, 1933, Serial No. 698,192

In Great Britain 3 Claims.

This invention relates to loose leaf binders,

and has for its object to provide an improved' cover construction. Hitherto many forms of cover constructions have been proposed and em- 5 ployed in loose leaf binders. On account of the hard usage to which such binders are ordinarily subjected it is usually necessary to make the covers of stout construction. When metal sheets are employed it is usual to provide in each cover a pair-of suitably spaced sheets to form the inner and outer surfaces of the cover, such sheets having their yedges secured together directly or bound by means of a frame. In this kind of construction the hollowinterior of the cover is often utilized to accommodate part of the binding mechanism. The object of the present invention is to provide' an improved cover construction which simplifies manufacture, avoids excessive weight, and provides the necessary strength and serviceability in a convenient manner.

The invention comprises a metal or other cover which is cast or moulded or made from metal sheet, is of rectangular form, and is constituted by a single thickness of material having a deep outer recess arranged adjacent to each of its longitudinal edges, the portion between the recesses forming at the inside of the cover a recess which serves to accommodate part of the binding mechanism. This recess is closed by a plate which lies flush with the inner surfaces of the external recesses, and which together with those surfaces provides a fiat support for the adjacent leaves secured in the cover.

In the accompanying sheet of explanatory drawings:-

Figure 1 is a side elevation, Figure 2 a sectional end elevation and Figure 3 a sectional plan of a loose leaf binder having covers constructed in accordance with this invention.

In one manner of carrying the invention into effect, the major part of each cover a may be made in the form of a thin casting or it may be pressed from metal sheet. If desired the cover may be mouldedfrom non-metallic material of the kind to which the term thermo-plastic is now commonly applied. A characteristic feature of covers constructed in accordance with this invention is that they possess an appearance cf substantial thickness and are at the same time relatively light and very strong. This effect is obtained by forming adjacent to 'each of the two longitudinal edges of the cover, a deep recess b the under surface of which forms part of the inner surface of the cover. The portion c of the outer surface of the cover lying between these recesses forms the base of a broad central recess d in the inner surface of the cover. This latter recess may conveniently be utilized to accommodate the binder mechanism e and is covered by November 23, 1932 (Cl. 12g-41) a thin plate ,f which lies flush with the other forms a ilat ysurface for the support of the leaves which are secured by the binder.-

In carrying out the invention, subordinate details may be varied in a number of ways. Thus there may be `hingedly connected to one edge of each cover a clamping bar g, the connection being effected by means of knuckle members h on the cover and clamping bar, the two parts being interconnected by a pivot pin i. is pressed from metal sheet the hinge member above-mentioned may be formed integrally with the cover. Also the plate f which covers the inner side of the central recess maybe formed integrally either with one ofthe hinge members or any of the edges of the cover, this latter being then formed by folding a metal sheet having one part shaped as above described. By this invention we are able to effect economies in material and labour and also in the number of parts required to form the binder. The necessary rigidity is also obtained with a minimum of weight. Moreover, the recesses b in the outside of the cover enable an important addi- When the cover.

parts of the inner side of the cover and with them tional advantage to be obtained in that they afford convenient hand grips which facilitate the carrying of the book from one position to another. By making the inner recess of standardized dimensions an inner plate of the one size serves for covers of several sizes. If desired rubber or other studs k may be attached to the bottoms of the recessed portions b and arranged to project slightly beyond the outer surface of the part c to prevent rubbing contact of that surface with the table or other support on which the binder is placed.

Having thus described our invention what we claim as new and desire to secure by Letters Patent is:- v

l. For use in loose leaf binders, a cover of rectangular form and constituted by a single thickness of material having a deep outer recess arranged adjacent to each of 'its longitudinal edges, the portion between the recesses forming.v at the inside of the cover a recess which serves

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