Патент USA US2109241код для вставки
Feb. 22, 1938. J. HA TALMAGE ` 2,1o9,241 LOOSE LEAF BINDER_ Filed sept. 16, 1935 N H , BY Ø o wA E T. RNDNT YR T.VM .IH ANO OER j OmIH E Patentecl Feb. 22, 1938 UNITED sTATEs PATENT OFFICE , :2,109341 LOOSE vLEAF BINDER John Howard Talmage, Chicago, Ill., 'assignor to Wilson-Jones Company, Chicago, Ill., a. corpo ration of Massachusetts , Application 'September 16, 1935,' Serial No. 40,707 6 Claims. This invention relates to loose leaf binders and more particularly to equalizer sheets for use in connection with so-called “visible” binders in which a plurality of sheets of less length than 5 the binder are arranged in overlapped relation ship so that one edge of each sheet is exposed a predetermined distance. In loose leaf binders of this type the total thickness of the sheet con tents varies from a maximum at the center to 10 a minimum at each end of the binder. This variation in thickness of sheetV contents renders it extremely di?icult to write on the various sheets while they are in the binder. - It is an object of this invention to provide 15 means for equalizing the total thickness of the sheet contents of the binder from end to end so that an even writing surface is maintained. It is a further object of this invention to provide equalizing means that can be rearranged to vary 20 the equalizing effect in accordance with the needs of the binder at any time. It is a further object of this invention to provide equalizing means that will not substantially increase the total thickness of the contents of the binder and will preserve ' the flexibility of the sheet contents of the binder. It is a further object of this invention to provide equalizer sheets that are inexpensive to manu facture and are e?icient in use. It is a further object of this invention to provide equalizer sheets that Will last inde?nitely and will not lose their equalizing effect even after long usage. Other objects of this invention will become ap parent upon reading the following description, taken in conjunction with the accompanying drawing, in which Figure 1 is a fragmentary perspective view of a loose leaf binder with equalizer sheets posi tioned therein; _ Figure 2 is a fragmentary perspective view of 40 a plurality of equalizer sheets arranged in a dif ferent relationship from Vthat shown in the equal izer sheets in Figure 1; and Figure 3 is a fragmentary plan view of an equalizer sheet constructed in accordance with 45 the present invention. In the drawing, the reference numeral 2 indi cates a conventional loose leaf binder having a back member 3 and a pair of cover members 4. A ring metal 5 provided with a plurality of di 50 vided rings 6 is secured to the back member 3 in any suitable manner. If desired, a plurality of prong members may be substituted for the divided rings 6. A plurality of sheets 'I is impaled on the rings 55 6. The sheets 1 are divided into banlss Or series (Cl. 129-1) by means of equalizer sheets i8 with one equalizer >sheet between each bank -of sheets. Each bank of sheets comprises a plurality of `sheets of less length than the length of the binder arranged in overlapped relationship. The overlapping vof UI the sheets causes each bank to vary in thickness from a maximum -at the central portion to a min imum at each end. The degree of variation in thickness Will depend upon the length of the sheets and the amount of overlap. The varia tion in thickness of any bank of sheets will in crease with increase in length of the individual sheets and with decrease in the amount of over- ' lap. The equalizer sheets '-8 are identical sov that ` only one need be described. "One' 'edge of the sheet 8 is provided with a plurality of apertures 9 of a size suitable for allowing impalement of the sheet on the divided rings 6. The sheet is provided with more apertures than the binder has rings or prongs so that it may be used in loose leaf binders in which one set of prongs may 0 be shifted relative to the other set. Binders of this type are well known and one is fully de scribed in United States Letters Patent No. 1,986,161 granted to Paul O. Unger January 1, 1935. Both ends of the sheet are preferably rein forced along the apertured edge by means of a pair of strips IO of celluloid or similar material each of which is folded over the inner edge to cover both surfaces of the sheet adjacent the apertures. A plurality of strips ll of fabric, celluloid, pa per or similar material of suitable thickness is secured to each end of the equalizer sheet 8. 3 Each strip ll is folded over the endv of the sheet 8 with a relatively short portion |2 on one side of the sheet and a longer portion |3 on the other side. Since the sheets 8 are identical, the strips Il of successive sheets will be superimposed on each other When the sheets are positioned in the binder as indicated in Figure 1. The equalizer sheets will add only the thickness of the sheets 8 to the medial portion of the sheets 'I where the thickness of the sheet contents 'l is at its maxi mum. At the ends of the binder, where the thickness of the sheet contents 1 is at its mini mum, the equalizer sheets add a double thickness of the strip II as 'well as the thickness of the sheet 8. In the intermediate area between the end of the portion |2 and the medial portion of the sheet contents, the equalizer sheet adds its own thickness and one thickness of the strip | I. The strips II are spaced apart a distance slightly greater than the width of the strips, and 55 2 2,1o9,241 the strips at one end are arranged alternately with respect to the strips at the other end of the equalizer sheet. The spacing between adja cent strips permits the sheets to be ?exed in turning, and also permits the strips of one sheet to ?t between the strips of another sheet when one sheet is tumbled, or turned end for end, as illustrated in Figure 2. The total effective thick ness of any number of equalizer sheets may be 10 varied by predetermined degrees from a maxi mum when the equalizer sheets are positioned as shown in Figure 1, to a minimum when every other sheet is tumbled, as indicated in Figure 2. It is preferred to position the longer portions 2. An equalizer sheet for loose leaf binders having its top and bottom edges each provided with a series of equalizing strips adhered to both sides thereof, each of said equalizing strips hav ing a long portion on one side of the sheet and a short portion on the other side of the sheet. 3. An equalizer sheet for loose leaf binders having its top and bottom edges each provided with a series of equalizing strips, the strips at one edgehaving a long portion' adhered to one side 10 and a short portion adhered to the other side, and the strips at the opposite edge being arranged , _in reVerSe manner. 4. An equalizer sheet for loose leaf binders 15 |3 of the strip || on one surface of the sheet'B havingra plurality of strips adhered to the top 15 at one end of the sheet, and on the' opposite , and bottomedges of said sheet in spaced rela surface at the other end of the sheet. With this tionship, said strips being narrower than the arrangement the sheets 8 willralways' show' uni-l , spaces intervening between said strips, and the form lengths of strip as the sheets of the binder strips at either edge of said sheet being aligned 20 are turned, regardless of whether the equalizer with the spaces at the other edge of the sheet. 20 sheets have been tumbled or not. . i, , 5. An equalizer sheet for loose leaf binders Although I have described a preferred em having a plurality of equalizing strips adhered bodiment of my invention in considerable detail, to both sides of said sheet adjacent one edge 2,5 it will be understood that the description there of is illustrative, rather than restrictive, as many details may be modified or changed without de parting from the spirit or scope of my inven tion. Accordingly, I do not desire to be restricted to the exact Construction described, except as 30 limited by the appended claims. 'I 35 claim: , - 1 1. An equalizer sheet for loose leaf binders hav ing its top and bottom edges each provided With a series of strips adhered thereto, the series of strips at one edge being laterally spaced alter nately of the strips at the opposite edge. thereof, each of said 'strips being folded at a point spaced from the center thereof Whereby the portions of said strips adhered to opposite sides of said sheet are of unequal lengths. 6. An equalizer sheet for loose leaf binders having equalizing elements adhered to both sides of said sheet. adjacent one edge thereof, the 30 equalizing elements on one side of said sheet be ing of different length than the elements on the opposite side of -said sheet. JOHN HOWARD TALMAGE.