Патент USA US2042470код для вставки
June 2, 1936- J. E. KIEFFER 2,042,470 INDENTED SHOCK ABSORBING CUSHIONING OR PACKING PAPER Filed Feb. 26, 1934 F1510 INVENTOR. JOHN E. KIEFFER ATTORNEYS Patented.- June 2, 1936 . 72,042,470 ' um'rse, STATES PATENT OFFICE‘ 2,042,470 INDENTED SHOCK ABSORBING CUSHION ING OR- meme PAPER John E. Kie?ealiwing, Ind. . Application February 26, 1934, Serial No. 713,961 _1 Claim. (01. 154-55) ' The present invention relates to shock absorb 4 is a cross-section taken along line 4-4 \ ing cushioning or packing paper of the type of Figure Figure 1; ‘ which is provided on one or both of its surfaces Figure 5 is a cross-section taken along line 5-5 with a multiplicity of more or less closely spaced of Figure 1; V 5 hollow protuberances o'r‘ indentations as distin Figure 6 is aplan view similar-to Figure 1 01-5 > guished from corrugations. Such paper is par a modi?ed form“ of material; ticularly adapted for wrapping and protecting fragile articles such as glassware.‘ 7 . . Figure '7 is a cross-section taken along line 1-1 ‘ In my prior patent (Patent No. 1,780,526 dated‘ . of Figure 6; _ a Figure 8 is a cross-section taken along line 0-8 " 1o November 4, 1930) I have disclosed a material of 'l of Figure 6; ' 10 this type in which the protuberances have been Figure 9 is a cross-section taken along line 9—9 molded into the paper after it has been complete of Figure 6; ' ly formed and after a substantial portion of its Figure 10 is a cross-section taken along line .water content had been removed without mate Ill-I0 of Figure 6. ' r r 15 rially decreasing its plasticity or causing the In the embodiment illustrated in Figures 1 to 5 15 ‘?bers to set in their usual substantially ?at con inclusive, the protuberances on the upper sur dition, and prior to the ?nal conditioning and face are denoted by the numeral I while those setting of the ?bers of the paper. By molding on ‘the lower surface are designated by the nu the protuberances in this manner I-have found meral 2. The ‘indentations on the upper surface . 20 it possible to produce deeper indentations than 'are by the numeral 3 while the char- 20 had been made by prior processes and to impart acterdenoted 4 denotes the indentations onv the under to the product a previously unequalled; rubber side. The protuberances‘o'n each of the sur like resiliency normal to its smface. _ This invention constitutes an improvem not over ' faces are in substantial contact along the lines 25 the invention disclosed in my prior patent and 2-2 and 3--3 while along the lines 4-4 and 5—5 has for its principal object the production of a they alternate with the indentations. The lines 25 2—2 and 3-3 are the diagonals of the, sheet. shock absorbing material having a deeper in In the embodiment shown in Figures 6 to 10 dentation than had been previously considered inclusive, the protuberances on the upper sur possible without disrupting the ?bers and which face are designated as I’, the protuberances on_ 30 in addition to an exceptionally "high resiliency and springiness has an extraordinary ?exibility the lower surface are denoted as 2' and the two 30 of indentations are indicatedlby the char in all directions, which enables it to be rolled in sets acters 3' and 4’ respectively. Itis to be noted any direction. ' In its very essence, the invention consists in‘ that the protuberances in this modi?cation are 35 arranging the protuberances so that they are in in substantial contact along the length and width . substantial contact along two intersecting lines. of the sheet ‘and that along the diagonals they 35 The two lines may advantageously be the length are separated by the indentations‘. By- ‘arranging the protuberances and indenta-, and width of the material or the two diagonals. tions as above described, it is possible to make The inventive idea involved is capable of re 40 ceiving a variety of mechanical expressions, two them deeper. In fact. the depth can be made as great as the width without disrupting the ?ber. ‘10 I‘ of which, for the purpose of illustrating the in To obtain the best results the protuberances and vention,-are shown in the accompanying draw ing, wherein: ' indentations shouldbe molded into the semi Figure 1 is an enlarged plan view of one side plastic sheet according to the teachings of my prior patent. II'he combination of the herein 45 of a small portion of material made accord I ing tothe teaching of the present invention, the described arrangement of protuberances and the 45 ' circles in solid lines indicating the protuberances method of producing them before the ?bers of I on the upper surface,'the circles in dotted lines the sheet have ?nally set produces a' packing ma indicating the protuberances on the lower sur terial of unexcelled cushioning capacity. 50 .‘face and the identations being indicated by the - pacesbetween'the'circles; I‘ . f ' stantially semi-spherical in form, but it is to be 2 ‘is a cross-section taken along line 2-2 9111mm‘ 1; _. ' ‘ ~ Figure 3-1:; a crossesection taken along line 1-3‘ psi-‘of Figure 1,31. ‘ The protuberances are illustrated as being sub- 50 ‘,understood that they may take other polyhedral shapes without sacri?cing any. of the advantages or the invention. , The term "paper" in this speci?cation is‘ used 55 2 ' 2,042,470 ing cushioning or in its ordinary sense in the art; namely, as a paper provided on both. sides with a multiplicity of contacting lines of sheet material formed by papermaking methods globular protuberances, all of said protgibprances being substantially identical in form and size, from an aqueousrsu'spension of ?brous material such as cellulose and/or asbestos which may be vadmixed with other vegetable, animal or mineral ?bers to impart to the product 'other desirable _ properties. Iclaim: the protuberances on each side forming hollow indentations on the other side, there being sub stantially no ?at surfaces on either side oi! the paper. ‘ ‘ As an article oi! manufacture, a shock absorb 7 ' JOHN E. KIEFFER.