Патент USA US2122746код для вставки
July 5, 1938. 2,122,746 M. P. KERNAHAN LOCK-TOP CONTAINER Filed Aug. 24. 1955 ' ////////, / I ~ 2 - Ill/1117211111414 v _ _ _ _ v _ A ‘ INVENTOR WMMWWN BY W, MY 2‘was ATTOR - ‘Patented July 5, 1938; ‘ 2,122,746 UNITED‘ STATES PATENT OFFICE 2,122,746 ' LOCK-TOP CONTAINER Martin P. Kernahan, Phillipsburg, N. 1., assignor to The Canister Company, Phillipsburg, N. 1., a corporation of New Jersey . Application August 24, 1935, Serial No. 37,641 6 Claims. (Cl. 229-43) The invention is an improved lock-top con tainer having a paper-stock body and a metal cover adapted to be locked to the body by a turn ing motion, as by means of an interrupted screw 5 thread connection. Lock-top containers of this kind are common in the art in which the paper body is provided with a metal edging or trim on which are formed 'the inclined ribs or screw threads to interlock with corresponding ribs on l0 the metal cover, the interlock being between two. metallic parts. , ' ‘The object of this invention is to produce a similar and equally satisfactory container in ' which the metal trim is eliminated and the cover .5 attaches direct to the paper. body, thus affording a substantial saving in manufacturing cost. Pre vious attempts to produce such low cost lock-top containers have met with no commercial favor principally because the wall or rim of the paper body having the screw thread ribs embossed thereon could not easily be‘ made rigid enough to prevent the ribs on the cover from pulling or riding over them,- thus releasing the interlock. By this invention this'objection is eliminated and 5 the cover ‘can be attached and removed with practically the same facility and security as with a metal-to-metal interlock. ’ By paper as herein used is meant any ordinary paper-stock or like ?brous material such as com 0 monly'used for making paper cans or containers chinery, the paper-stock being well sized. or stiff ened to enable it to retain the shape given to it by the bossing dies. It is to'be noted that by virtue of the circumferential separation of the inclined ribs no two of them are laterally adjacent so i that the displacement of stock incident to the embossing of one is not affected by the proximity of the other, thereby facilitating the formation of ribs with sharp well bossed contour. , The metal cover is formed with a depressed 10 center 3 and a_ circumferential ?ange 4,.the latter being provided with a curled ?nish-bead 5 along its edge, and with a number of inwardly em bossed inclined ribs 6 for screw'thread or inter locking engagement with the outwardly bossed 15 paper ribs 2. When the cover is applied to the rim of the paper body and rotated, the metal ribs ride under the paper ribs and by virtue of their inclinations draw or lock the cover on the body, in which position its ?nish-bead 5 bears more or less on the stop-bead I, and the top of the annular groove, formed between the flange and the de pressed part of the cover, seats on the top or cut edge of the paper rim. This produces a double seal for the container, one at the bead and .one 25 at the edge, to prevent escape of its contents or entrance into it of foreign matter. It is not in dispensable that the cover ‘make simultaneous contact at both places but it is desirable and such construction is preferred. 30 and the term “metal cover”, as herein used, The annular wall 1 which forms the inner wall comprehends covers made of any similar or hard ' of the annular groove just referred to is specially material. I dimensioned'with relation to the paper body so The container illustrated in the accompanying that in the application of the cover, it bears 5- drawing will’ su?ice to exemplify the principles snugly against the inner surface of the paper rim of the invention it being understood that there of the body and thereafter supports it against 35 is no limitation to this particular form except bending or yielding. inwardly, out of interlock as required by the claims. In such drawing Fig. ing relation, thereby resisting the tendency for 1 is a side elevation with cover separated, Fig. 2 ‘the metal, ribs to ride over the paper ribs. For ) a top plan of the container body, Fig. 3 atop plan this purpose the wall 1 is desirably, though not of'thecovenand Figs..-4 and 5 enlarged longi ‘necessarily, ‘formed with a slight conicity as in 40 tudinal sections atthe interlock. , dicated. Fig. 5 illustrates this supporting func The body of vthe container as shown'is eyliné tion; from which it will be apparent that the paper ‘ dri‘cal. and maybe understood to be formed of i wound ‘paper-stock as usual and provided with rib must be ‘virtually crushed-by the ‘metal rib any'suitable bottom, metal or otherwise as pre- ' before the cover can be pulled on‘, and since the ferred. ,Its upper end is formed with an out wardly embossed circumferential stop-bead l and 4 a series, of outwardly embossed inclined ribs 2, rib is well sized this action is effectually re sisted. ' - The security of the attachment is increased by treating or coating the surfaces of the ribs, or more easily the surface'of the whole rim above the stop-bead, to give it a greater friction coe?l cient to metal than the paper stock alone would > above the stop-bead, spaced apart equally around the circumference, six of such ribs being shown with the spaces between them somewhat shorter than their own lengths. The bossing of the stock afford. This can be done in many ways as for to form the bead and ribs is a well known proc example by dipping the rim in a lacquer of shel ess and can be performed in automatic ma lac in alcohol, or in an enamel, or in fact any 2,122,746 2 kind of surface-coating material which is inex pensive ancLa non-lubricant, that is to say, upon the extent that they are individually new they constituteeparts of this invention usable in other which the metal ribs will not slide as easily as ' relations as will be evident. I claim: ' on the bare paper. The increased friction pro 1. A lock-top container comprising a paper duced in this way does not objectionably or ap preciably obstruct the rotation of the coveron body and metal cover respectively provided with the paper because then the ribs move endwise, ' ribs adapted to interlock,vthe cover including a but it does obstruct the riding of the metal ribs wall of conical shape adapted to engage and sup over the paper ribs because in that case the metal 10 ribs must move sidewise. Increasing the friction thus favors security of attachmentlwithout other wise a?ecting the operation. ' ' In the ordinary case the metal wall which sup ports the paper rim against bending or yielding 15 out of interlocking relation with the metal ribs can be produced most easily by depressing the center of the cover as commonly done in many forms of container covers, but so long as its de scribed function is properly performed, the style 20 or mechanical organization of the cover as well as the depth, location and shape of the wall it— self will be seen to be relatively subordinate and to be determined according to circumstances. It is a further feature of the invention that the port the paper rim of the body against bending away from interlocking relation with the ribs in the cover. 2. A lock-top container comprising a body and cover, thebody being wholly of paper and formed with a series of inclined embossed ribs circum ferentially spaced apart at intervals around its rim, the cover being of metal and formed with mating ribs'to' interlock with the paper ribs and with an annular wall engaging and supporting ' the inner side of the paper rim when so inter locked, said paper rim and the ribs thereon being impregnated with a non-lubricating material pro viding increased friction to the move‘ment'of the metal ribs thereoverc 3.: A lock=top container comprising an all metal ribs or projections on‘the cover are cir.-. papei.‘ body wall cut from tubular stock. and cumferentially spaced from each other by short formed with an embossed stop-bead and a series and uniform distances because this helps mate rially in preserving the paper rim from becoming distorted from true circularity by the force some 30 times applied in screwing on the cover. In this respect the metal ribs supplement the functions of the stop-bead, and the support wall‘I. The number of ribs is subject to variation according to the body diameter, six being found satisfactory for body diameters ranging from two to six inches, being in each case circumferentially spaced from i‘each other by distances not greater than their own lengths and not greater than the spaces be tween the paper ribs. So organized the high ends 40 of the metal ribs will occupy the spacesbetween the paper, ribs when the cover is screwed ihome thereby aiding in preserving circularity. This is indicated by the dotted lirie position of the metal ribs in 1. It will be seen that in performing 45 this function it is not necessary that each one of ‘the metal ribs shall interlock with mating pa per ribs, whichris to say that the purpose of maintaining circularity can be accomplished. by -of inclined ribs circumferentially'spaced apart between said bead and the cut edge, and a cover having a metal ?ange provided with a finish bead and with mating ribs to coact with said stop bead and paper ribs respectively, and having a de pressed center forming an annular wall for en- ‘ gaging and supporting the cut edge of said body wall when the cover is screwed home. ' ,4. A lock-top container comprising an all-pa per body wall cut from tubular stock and having its rim portion embossed with circumferentially ‘ spaced, inclined ribs and a metal cover formed with mating ribs to'interlock with said paper ribs and having a depressed center forming an annular wall adapted to engage the out edge of said body wall, said rim- portion being covered with a non-lubricating coating and said metal ribs being of greater length than the paper ribs. 5. A lock-top container comprising an all-pa- l per body wall having :a circular stop-bead em bossed therein below its out edge and _a series of inclined ribs embossed above the bead, a ?anged metal cover having a circular groove to receive ribs. It is preferred however that all of the said edge and a series of inclined ribs to inter- . lock with the paper ribs, the cover and body parts projections be ribs adapted to interlock with cor being relatively dimensioned so that the bottom responding paper ribs. It is likewise important anda collateral fea ' of the groove seats on the cut edge of the body ture of the invention that the angle of the metal when the ?ange of the cover abuts ‘the stop-bead, and paper ribs be about 10“_. While lower angles thereby forming a double seal for the container. 6. A lock-top container comprising an all-pa are permissible within the limits of the inven tion, it has been found that-an angle of about perv body and a metal cover respectively provided cover projections that are not ribs or inclined' this value, in combination with tither features of the new structure, practically removes all possi 60 bility of driving the metal ribs over'the paper ones even by the application of excessive screwing-on force, and at the ‘same ‘time adequately locks the cover against unscrewing itself. All of the features above described cooperate in producing a superior lock-top container but to with embossed inclined ribs adapted to interlock by rotary cover motion, the paper body being embossed with a circular bead below its inclined ribs and having a friction-increasing coating on said ribs, and said cover having an annular wall normally having a bearing contact with the inner side of the paper rim. . MARTIN P. KERNAHAN.