US1787956A - Booster for loose-leaf ring books - Google Patents

Description

Jan. 6, 1931. J. SCHADE 1,787,956

BOOSTER FOR LOOSE LEAF RING BOOKS Filed Nov. 29, 1929 [77 Ue??? for fo/171 @c ad@ 5y y Patented Jan. f6, 1931 y UNL'IEQD STAT-ES JOHN SCHADE,OF HOLYOKE'MASSAGHUSETTS, .ASSIGNORV TO NATIONAL BLANK BOOK COIVIPANY, OE HOLYOKE,MASSA.CHUSETTKS, A COREOEATION,OF'MASSACHUSETTS BoosirER FOR LOOSE-LEAF RING Booxs Appiicanon sied November 29, i929. seriai'iro. 410,391.

This invention relates to loose 'leatbooks of the kind known as ring binders in which curved prong members/are carried by flatv metal strips hingedly connected at their centersandconned along theirouter edges` within .a resilient plate, so that the prongs are yopened and closed with a spring action.

But the present invention specifically. has reference to what are kno-wn as boosters that are manipulated to open the prongs and that are located at the ends of the binder, the object of the invention being to so pivot the booster directly to the ends ot the prongcarrying leaves, that they cannot become 'accidentally disassembled, arev `positive in their operation, and add little to the cost of the binder. y

In the accompanying drawings Y i Figure l is a broken top view of a bindei' equipped with the improved booster.

Figure 2 is a bottom view of suchbinder. Figures 3 and 4 are sections at line 3-3 of Figure 2, and showing respectively the positions otpai'ts before and after the booster has been operated.

Figure 5 is an end view of the structure shown at Figure l with the prongs omitted, and

Figure Gis ajdetail perspective of the.

booster.

Similar numerals of reference denote' like parts in the several figures of the drawing. i

l is the cover plate of the binder made of spring-metaland having its side edges bent inwardly to Jform pockets 2 within which the hinged prong-carryingleaves 3 are housed in the usual manner, and 4 are the prong members.

The leaves 3 are extended from'the ends of fthe binder and their outer lateral extremities have inwardly projecting hooks 5 which proy vide notches 6 for the purpose presently to be explained.

The booster" comprises an upstanding 'liunib or linger piece 7 and a lower inwardly extending triangular part 8 which is the actual booster member, and the lateral edges of the booster intermediate the parts 7l and v8 are notched as shown atf9, and prior to the assembly of the leaves l3 within the pockets 2,

the notches 6 and '9 are interengaged so'as to provide a pivotal relation between thebooster Land the leaves, and after suchassembly the' vpart 8 will extcndbeneath the leaves with the apex of said part immediately below the *Y leaves at their line of hinging as clearly shown at `Figure 3.

When the part 7 is forced outwardly the partA 8 will be thrown upwardly against the leaves and will cause them tospring into the yposition shown at Figure 4 and this will open the prongs 4. s

There is nothing new inthe construction ofr lthe ring binder shown, nor is it new to provide -boosters which operate in the manner above described, but' the invention resides solely in the mannervof hiiiging the booster.

I/Vhat is claimed is": i

l. In a loose leaf ring binder comprising a v`resilient c plate, vprong-carrying hinged extensions beyond the-ends of said plate, in-

wardly projecting hooks formed on said eX-.

tensions, and abooster having an upstandiiig part and an inwardly extending bottom part and provided with notches at the sides intermediate said parts, said notches being interengaged withV said hooks.

2; Ina loose leaf ring binder comprising a resilient plate, hinged prong-carrying leaves confined within said plate and having notched extensions beyond the ends of said y notches in the inner side edges of the leaves `leaves' confined within said plate and having adjacent the ends thereof, whereby the booster is held in pivotal relation to said leaves.

-In testimonywhereof I aliix my signature hereto. y

' l JOHN SCHADE.

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