Патент USA US2404741код для вставки
July 23, 1945- ‘ ‘ F. OTTENSTEIN ' BOTTLE CLOSURE Filed March 27, 1942 2,404,741 _ 2,404,741 Patented July 23, 1946 UNITED STATES PATENT OFFICE 2,404,741 BOTTLE CLOSURE Friedrich Ottenstein, Copenhagen, Denmark; vested in the Alien Property Custodian Application March 27, 1942, Serial No. 436,532 In Denmark March 27, 1941 5 Claims. 2 In the manufacture of bottle closures of the crown-cork-type, sealing discs of cork or of cellu lose in a “worked” state, such as cardboard, have faces are turned against each other whereby a. been used. n (Cl. 215—40) 1 ‘ The principal object of the present invention is, as a substitute for cork, to employ a special kind of cellulose material one surface oi‘ which, according to a further feature of the invention, su?icient degree of elasticity is obtained. In the preferred form of the invention, com bining two layers of cellulose material in the sealing disc, it is important for the further han dling of the layer when placing the same in the metal crown and pressing the crown onto the bottle and also for the purpose of obtaining the proper degree of elasticity, that the corrugations is corrugated. A further object of the invention is to secure 10 on the facing sides of the layers take up a ?xed position adjacent to each other, so that they'are the highest elasticity at the required points of the not displaced in relation to each other. The po sealing disc and for this purpose to use two or sition of the little indentations over the surface more discs, the dimensioning of the discs and of each layer is not exactly uniform, and, the po the pasting together of the same at special points 15 sition of the indentations in relation to each other being further features of the invention. is therefore non-uniform. It is, however, of im The cellulose materia1 employed i. e. pulpboard portance that the relative position be kept con without the addition of glue or ?lling materials, stant. The layers or discs may therefore be glued usually used in paper making, does not in the together, as indicated at ‘I, so that the points, same degree as cork possess the plastic and elas tic properties which are characteristic of this ma 20 which haye contact with each other, remain in contact and so that on the other hand around terial, and it is therefore, another object of the these points areas will be found which do not invention to take advantage of the natural quali contact and where, when the sealing disc in its ties of the pulpboard, including its tenacity and entirety is subjected to high pressure, will give toughness combined with some degree of alas ticity; and to employ the special shaping of the surface of the pulp obtained by rolling or pressing the same While dry and consisting in little indenw tations providing maximum elasticity. These small indentations, which are only found on one side of the disc, in no way in?uence the structure of the mass, as they are formed during the composition of the same, and are, therefore, quite different from indentations made by spe cial tools in paper board, which is hardened by glue and ?lling materials, so that such inden tures will considerably weaken the structure. Cellulose material of the kind dealt with will for the same reason be very cheap in use, as it does not require any special treatment apart from the one it has already been subjected to during its drying, rolling or pressing. When the sealing disc is placed in the part of the bottle closure consisting of the usual outer metal crown, the corrugated side of the disc is turned inward towards the metal so as to give way at points when pressure is applied to it. The other side of the disc has a comparatively smooth surface, so that in conventional man ner it may be covered with a protective layer 5 of high ?exibility such as “Cellophane,” with or without a further protective layer 5 consisting of a, central aluminium spot. Further, according to the invention two or more layers of the above mentioned material may be employed, in which case the corrugated sur - Way and thereby increase the elasticity of the disc considerably. I It has appeared to be of the greatest advantage to choose the diameter of one of the discs form ing the complete sealing disc somewhat smaller than that of the other and in a sealing disc of this nature to glue only the central parts of the layers forming the disc together. Referring in detail to the drawing, Fig. 1 shows a single layer of pulpboard according to the in vention, and Fig. 2 shows on an enlarged scale, a transverse cross section of a bottle closure of thecrown cork type with a sealing disc consisting of two layers placed th'erein, one of larger diam eter than the other; and Fig. 3 is a view similar to Fig. 2, showing a modi?cation. By employing a sealing disc of the nature in dicated, in which the two layers are only glued together by their central parts, the outer edge of the large layer will lie rigidly against the bend of the outer crown shell, while the entire disc be cause of the upper layer, which has a smaller di ameter of less dimension, may follow the bottom of the metal crown, when it is bent and deformed by the pressure created, when the bottle closure is pressed onto the bottle. The sealing disc will under these circumstances give way with a certain degree of resiliency. The advantage obtained by gluing the layers together at certain points has been described above, and this advantage is naturally maintained in the a 2,404,741 3 special embodiment dealt with here, but the dis advantage presentedv due to the fact that the , 4 ‘ - facing sides to de?ne multiplicities of relatively discs, when the adhesive material in the course of time becomes hardened, and the resiliency therefore diminished, is avoided, as only the outer small projections, central areas of the corrugated sides being glued together and marginal areas thereof unglued to permit said marginal areas to work relative to eachother as the cap is'in edges, which should be most active because they stalled on the bottle. are the parts of the disc which are subjected to the most pressure, are free to slide on each other. The upper edge of the bottle mouth will not terminating in a circular rounded lip, of a crown press directly upon the extreme outer edge of the sealing disc, but if one bisects the radius of the same the pressure from the bottle neck will act approximately in the centre of the middle of the outer half of the bisected radius. By letting the vpressure act approximately at the edge 'of the upper layer of less diameter the same will be bet ter adapted to give way and add to the resiliency of the entire sealing disc. In the drawing l is the plane part of the outer ‘metal shell, 2 the edge of the shell, and 4 and 3 the upper and lower layers of the complete seal ing disc. As it will be seen from the drawing the lower layer 3 has a circumference, which reaches out to the edge of the crown cork metal shell 2, while the upper layer 4 is somewhat smaller. If the disc is subjected to pressure acting in the direction of the arrow A the lower layer 3 will give way and may be bent without meeting any 3. The combination with the mouth of bottle type closure comprising a skirted cap to securely 10 engage over said lip and close the mouth, a seal ing disk engaging the undersurfaceof the top of the cap within the skirt thereof, said disk com prising two circular plates of un?lled pulpboard corrugated to de?ne multiplicities of relatively 15 small projections on their facing sides, said plates being substantially plane on their other sides, and limited centralized'areasxof the facing sides of the plates being glued together, with the remain ing marginal portions of the plates free and capa 20 ble of being deformed relative to each other as ' the cap is forced on the bottle with the marginal portion of the lower ‘of the two plates in engage ment with the lip of the bottle. 4. A sealing disk for a skirted crown type clo 25 sure to ?t over a bottle mouth, said sealing disk, being adapted to engage the underside of the top of the cap, said disk comprising two circular plates of un?lled pulpboard, at least one of which is of a diameter to substantially ?t within the obstacles. Because of the rigidity of the material employed, the entire sealing disc has considerable 30 skirt of the cap, the facing sides of saidv plates elastic properties. being corrugated to de?ne multiplicities of rela Figure 3 shows,‘ in cross section similar to Fig tively small projections thereon with the opposite ure 2, another embodiment of the invention which ‘ has a Cellophane disk 5 under the disk 3, and a sides of the plates being uncorrugated, and with limited central areas of the corrugated sides of smaller metal foil spot 6 on the underside of the 35 the plates glued together so as to leave marginal ‘ Cellophane disk. portions thereof free to be deformed relative to Having now described my invention what I claim as new and desire to secure by Letters Patent is: 1. In a crown type bottle closure, a skirted cap, a sealing disk engaging the undersurface of the top of the cap, said disk comprising two cir cular plates of un?lled pulpboard, one of the plates being corrugated on the side thereof fac ing the top of the cap and being plane on its op_ each other when the closure is applied to a bottle. 5. A bottle mouth closure of the crown type in cluding a skirted cap and a sealing disk engaging the underside of the top of the cap and sur rounded by the skirt of the cap, said sealing disk posite side, and the plates being cemented to gether over a limited centralized area whereby being composed of two layers of puri?ed pulp board devoid of sizing or ?lling, said two layers being corrugated on their meeting surfacesv whereby the natural elasticity and conformability of the pulpboard is substantially increased, the layer adjacent to the underside of the top of the the edge portions of at least one of the disks is left free to ?ex relative to edge portions of the cap being smaller in diameter than the other ‘ other disk. 2. In a crown type bottle closure, a skirted cap, a sealing disk engaging the undersurface of the diameter layer is freed to be deformed relative to the smaller diameter layer and relative to the top and skirt of the cap as the closure is applied top of the cap, said disk comprising two circular plates of un?lled pulpboard corrugated on their to close the bottle mouth. layer whereby the peripheral portion of the larger , FRIEDRICH OTTENS'I‘EIN.