US 2246763 A
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Description (OCR text may contain errors)
June 24, 1941'. B S HL' S ER 2,246,763
tbos'E-pEAF BINDEii 1' Filed Nov. 21', 1938- 2 Sheets-Sheet 1 June 24, 1941. SCHLQSSER 2,246,763
LOOSE-LEAF BINDER Filed NOV. 21, 1958 2 Sheets-Sheet 2 Patented June 24, 1941 LOOSE-LEAF BINDER Benjamin 'Schlosser, Chicago, 111., assignor to Wilson-JonesCompany, Chicago, 111., a corporation of Massachusetts Application November 21, 1938," Serial No.2e1,629
This invention relates to a loose leaf binder and particularly to structure for facilitating the efficient and economical use of a binder of the type having a pair of hinged back sections and a series of curved sheet retaining prongs mounted in each of said back sections.
In binders of this general type it is customary to provide latching means for holding the back sections in closed or in intermediate position. When the latching means is released the back sections may be moved to fully open position. It has long been known in the art that a binder of this type balanced so that the back sections may be moved from intermediate position to fully open position with a minimum expenditure of energy is very desirable. This result has been accomplished to some extent by providing means for increasing the effective width of the back of the binder by hinged supporting members adapted to swing laterally about the hinges connecting the covers to the back sections as described in the Martin Patent No. 1,722,812 issued July 30, 1929, or by extending the back sections to provide projecting portions extending beyond the planes between which the sheets are confined.
It is an object of my invention to provide means for supporting the hinged back sections of a loose leaf binder so that they may be easily moved between partly open and fully open position without the intervention of any extra parts and without adding to the width of the binder. It is a further object of my invention to provide means for absolutely preventing rocking movement of the back sections of the binder when pressure is applied to either cover, as in writing on the sheets, when the binder is in partly open position. Other objects of my invention will become apparent upon reading the following description, taken in conjunction with the accompanying drawings, in which-- Figure 1 is a perspective view of a loose leaf binder embodying my invention;
Figure 2 is an end elevation of the binder in closed position;
Figure 3 is an end elevation of the binder in partly open position;
Figure 4 is a view similar to Figure 3 with the back sections open more fully; and
Figure 5 is an end elevation of the binder in intermediate latched position.
In the drawings the reference numerals 2 and 3 indicate a pair of back sections connected by means of a hinge 4. Each back section includes a bottom wall 5 and a side wall 6 extending at an obtuse angle to the bottom wall. The bottom wall 5 includes a strip 5 of fiber or similar material to provide a neat appearance. A plate 1 secured to each side Wall 6 is provided with a plurality of sheet retaining prongs 8. The prongs extending from opposite sides overlap when the back sections are in the intermediate latched position of Figure 5 or in the released partly open position as shown in Figure 3.
The back section 2 is provided with a box member 9 and the back section 3 with a similar box member [9. A plurality of curved latching bars II project from the box member ii through apertures [2 into the box member ll). A locking slide l3 provided with a finger piece 54 is mounted in the box member Ii! and is adapted to engage notches l5 or IS in the curved latching bars to hold the back sections in closed or in intermediate latched position. A suitable spring H has one end secured to the locking slide and its other end to the box member ill to restore the slide to latching position as soon as the finger piece [4 is released.
A hinge plate 18 is secured to each side wall 6 in any suitable manner. A cover member I9 is secured to each hinge plate. The hinge 29 is positioned on the side wall 6 a distance above the bottom wall substantially equal to the thickness of the cover member so that when the binder is in partly open position with the bottom walls of the back sections lying in a common plane, the cover members [9 are adapted to lie in the same common plane.
In use a plurality of sheets 2! is impaled on the prongs 8. If the user is desirous merely to read the information contained on the sheets he may open the back sections to intermediate position, as shown in Figure 5, and use the binder with the back sections latched against angular displacement relative to each other. However, if it is desired to remove and to insert sheets, as in machine posting, the looking slide may be disengaged from the latching bar and the back sections left in partly open position, as seen in Figure 3. In this position the balance of the back sections permits rapid and easy movement of the back sections so as to open the prongs to the position indicated in Figure 4 so that sheets may be readily removed or inserted, and to overlap the prongs, as indicated in Figure 3, so that the sheets may be turned from one side of the binder to the other,
It is sometimes desirable to write on the sheets while they are still in the binder. In most binders the pressure applied in writing on the sheets is suiiicient to rock the binder on its back secchanged without departing from the spirit or 10 scope of my invention. Accordingly, I do not desire to be restricted to the exact structure described, except as limited by the appended claim.
In a loose leaf binder, a pair of back sections 15 hinged together, said back sections having bottom walls extending angularly to each other when said back sections are closed, and side walls extending at obtuse angles from said bottom walls, each of said side walls having a plurality of sheet retaining prongs mounted thereon, and a latch for holding said back sections in intermediate position with the planes of said bottom walls intersecting each other at an angle of less than 180 degrees, said bottom Walls being adapted to lie in a common plane with said back sections in partly open position when said latch is released, said sheet retaining prongs mounted on each of said side walls overlapping the prongs mounted on the other side wall to an extent sufficient to prevent accidental displacement of sheets impaled on said prongs when said back sections are in partly open position, said back sections being freely movable from said partly open position to a fully open position, permitting removal of sheets or impalement of sheets on said prongs without manipulation of said latch.