US2008798A - Means for facilitating the removal of lids from the bodies of tins and the like - Google Patents

Description

E. R. RosslTl-:R 2,008,798 -MEANS FOR FACILITATING THE REMOVAL OF LIDS FROM THE BODIES oF TINs AND THE LIKE Filed May 19, 1954 July 23, 1935.

Patented July 23, 1935 n f PATENT OFFICE MEANS FOR FACILITATING THE REMOVAL OF LIDS FROM BODIES OF TINS AND t THE LIKE Edwin Ralph Rossiter, Sydney, New South Wales, Australia n Application May19, 1934,*SerialrNo. 726,593 In Australia May 19, 1933 1 claim. (o1. 22o-43) This invention relates to improved means for facilitating removal of lids from the bodies of tins and the like.

vManydiiferent means have been devised for 5 achieving the before stated objective. Some such known means have necessitated the employment of la device additional to the body and lid of the tin or the like and/ or intimately associated therewith. I `The presentV invention does not necessitate the employment of any device additional to the body and Vlid of the tin or the like and its aimV more particularly stated is to provide,'in a receptacle which is of the known typev having a removable lid or cover adapted upon pressure being applied toit to be released or opened by being tilted upon fulcra portions or rocker points, an improved ar.- rangement of such fulcra portionsor points which in association with a special inwardly curved or 20 recessed formation of portion of thebody of the receptacle brings about much limproved results as comparedwith the before-mentioned known constructions. 'f The invention contemplates a novel and pe- 25 culiar 'formation of the upper porticnof the receptacle body and particularly of its shouldered or beaded portion and of Aits rim portion.

The said `shouldered or beaded portion of the body of a tin of the ordinary lcommon variety 30 such as would be usedin the marketing for ex-V ample of boot polishes is formed during stamping operations in substantially the same plane and all around the 'said tin body and against and/or upon such shouldered'o-r beaded portion the yedge 35 of the lid when in closed position is adapted to abut or rest.

yAccording to the present invention, the said shouldered or beaded portion extends circumferentially of and in the same plane only some 40. distance more than half around (as for example approximately two-thirds around) the tin body to form what will be herein termed a main beaded body. portion, the extremities of which latter are preferably of rounded and/orV inclined form and 7 design and function as the fulcra or rocker points upon `and about which the' lidfmay be movedr or tilted by manual pressure applied to that portion of it whose edge isnot resting upon or in contiguity'with. thesaid main beaded body portion. 1

described that portion of the said body which lies between vrand adjaoentgto the said extremities or rocker points of the saidmain beaded portion is 55 To facilitate the movement of the lid as last inwardly Vcurved recessed or depressed in specialA manner, thus freely permitting the requisite slight l movement inwardly' of therelative portion of the lid flange and edge as when manual pressure is applied to the lid to depress one side or edge portion of it so that that lid portion diametrically 5 opposite to the point of application of such manual pressure is raised completely away from the-rim and rimvedge of the body from which the whole lid construction may `then be readily completely removed. 1 10 @The rim portion of the body of the receptacle is of peculiar construction so formed as to on the one hand ensure a snug sealing lor fitting therewith of the lid when'in closed position upon itso that` the said lid may not be accidentally raised or raisedvin any other 'manner than 'by initial tilting movement aboutthe said fulcra or rocker points and so' that materials contained may thus be adequately protected against deterioration Y either by evaporation of their volatile content or by ingress of air or atmospheric moisture, and on the otherhand topermit the said lid when so required and by beingrst moved or tilted about the said fulcra cr rocker points to be with a maximum of ease removed from the'body. Y, To 'this last-mentioned end the said rim portion of the said body progressively varies slightly in depth and in form at different parts of it, being narrower'at its part which is midway of the said rocker or fulcra points of the said maink beaded body portion and being deeper at its part which is diametrically opposite to its last-mentioned part; and having an inclined circumferential lidsealing protuberance which forms a very effective sealing lineas will be seen and which to such end has a slight progressive downward inclination extending from its said first-mentioned part to its said last-mentioned diametrically opposite part, suchA inclined circumferential lid-sealing protuberance forming an important feature of the invention. l f

hat part ofthe said rimportion adjacent the lowest part of its said inclined circumferential lid-sealing protuberance furthermore has its lip incurved in inwardly sloping fashion and this feature also is deemed to be ofsome importance.` Thin packing as of oil impregnated 'paper' or of metal foil commonly known as fsilver paper may be'used, in association with aconstruction 50 according to the invention, inknown manner for its known purposes. d

In order that the invention may be clearly vunderstood referencel will now be made .to the a'ccompanying drawing wherein like referencenugio merals refer to like parts throughout the several views which are as follows:-

Figure 1 is a side view of a construction according to the invention showing portions of the lid broken away to show the peculiar formation of the rim portion of the container body and the close fitting of the lid therewith.

Figure 2 is a view of Figure 1 taken in the direction of the arrow A showing the beaded formation of the container body which permits ready removal of the lid, portion of the latter broken away to show the lid-sealing protuberance of the rim portion of the said container body.

Figure 3 is a side View of the container body With the lid removed therefrom showing. in chain dotted lines at once the inclined direction of the said circumferential lid-sealing protuberance of the rim portion of the container body and the effective sealing line for the lid when in its closed position. Curved dotted lines indicate an alternative beaded formation of the container body designed to more nearly conform with the shape 'and 'disposition of the iid odge when montrer is depressed. n

Figure 4 is a similar View to Figure` 1 showing the' lid' partly removed. Figure 5 is a perspective View of Figure 4.

Figure 6 is a rear elevational view B of Figure 3. Figure 7 is an enlarged view (in proportion) of Figure 3 and serves with the description which follows to illustrate more clearly constructional The said main beaded body portion I3 is disposed parallelly with the edge of the. body rim I4 and extends some distance more than half around as approximately two thirds ofthe dis- 4 tance around the circumference of the container body IIJ its extremities forming fulcra or rocker points I5. v

From each of the points I5 is a straight downward extension I6 approximately at an angle of forty-five degrees'and a horizontal continuation toform the comparatively short beaded body extension I6 of the main beaded portion I3 may boly rim tI4 which part is midway between the portion I1 located near the lower portion of the container andbelow the said main beaded portion I3. Y

Alternatively in lieu of the straight angular be acurved extension (see dotted lines inFigure3).V 4

To give lgreater prominence or definiteness to and to prevent 'cracking or fracturingl during manufacture of,V the -fulcra yor rocker points I5,`

inward depressions I 9 of the body I0 extend above and somev distance along from the said points. l -1 That portion of thecontainer body I0 located above its snort horizontal beaded portion l1v is inwardly curved or V'recessedas .at I8 so forming above Ythe said horizontal beaded portion VII a projecting portion Vof the body rim I4.

'That part of the said projecting portion of the fulcra or Arocker points I5 constitutes the highest part 2I of an inclined circumferential lid-sealing protuberance 20.

The said circumferential lid-sealing Yprotuberance 20 inclined slightly from its said highest part 2I downwardly towards the diametrically opposite part 22 of the body rim I4 where it reaches its lowest part.

In Figure 6 the said circumferential lid-sealing protuberance 20 is represented by shading lines which clearly indicate its inclination and/or varying depth. v Y

From adjacentI the said part 22 the said body rim I4 extends upwardly and inwardly slightly as indicated by the incurved sloping body rim portion 23 which functions as will be seen (coincidentally with the said inclined circumferential lid-sealing protuberance 20) to facilitate reception over the body rim I4 or removal therefrom of the lid I I portion of whose edge I2 is adapted to abut or rest against the main beaded body portion I3 in known manner for such closures.

To fit the lid II closely and securely over the body rim I4 it is first applied over the highest part 2| of the inclined circumferential lid-sealing protuberance 20, its diametrically opposite part being then firmly pressed down over the part 22 of the incurved sloping body rim portion 23 `to be levered or gently forced over the adje-- cent lowest part of the said inclined circumferential lid-sealing protuberance 20.

The position of the sealing line or close fit of the lid I I around the body rim I4 is clearly shown by the chain dotted line 24 in Figure 3 wherein is also'indicated the greater prominence of the highest part 2| ofy the inclined circumferential lid-sealing protuberance 20 relatively to and with its lowest part at 22 and relativelyvto and with the associated incurved sloping body portion 23. It 'will be at once clear from a reference to the drawing herein and to the manner of fitting or applying the lid closure Il over the body rim I4 and over its inclined circumferential lid-sealing protuberance 20, thatany ordinary attempt lmade to remove the said lid I I by any pull in the ldirection indicated by the arrow C (see Figure 1.) must necessarily result in failure, since the lid II is (as against any normal force so applied) firmlybound around and about the said inclined circumferential lid-sealing Y protuberance 20 whose diameter is slightly greater than is the interior diameter of the said lid.

' The said lid I I may however be readily removed only by firmly depressing manually (or otherwise applying thereto equivalent pressure), that portion* of the lid which is disposed immediately adjacent the vsaid inward curve or recess I8 of Ithe container body IIJ.` v

Such firm manual depression (or its equivalent) of the lid I I causes the latter to at once tilt by `its edge I2 upon the prominences which form the fulcra or rocker points I5, (see radius line 26 and arc 2Gb of Figure 7) the lid edge receding slightly into the inward curve or recess I8 andA into the inward depressions I9 and the movement imparting to the lid a, slight sliding action upon the said fulcra or rocker points I5 as that .pori-f tion of the said lid which is diametrically opposite to its said portion upon which the said firm manual pressure isbeing applied is causedV to rise away from engagement with the lowest part of the said inclined* circumferential lid-sealingl protuberance 2D and clear of the incurved sloping body rim portion23. f o

Thus although a veryclose fit of the lid over the body is maintained at all material times,A the said lid may be instantly and readily removed in very convenient andsimple manner 'as de- Adentation between said rocker points, an inclined scribed but only in such manner and yet without necessitating the employment of any device additional to the body and lid which latter together form the complete container.

Within the scope of the invention as described and claimed herein, there may be employed modifications as in regards to shape and design of articles manufactured in accordance with the invention.

What I do claim is:-

A circular metal box comprising a container member and a lid member, said container member including a beaded portion extending partially and circumferentially aboutthe container member, the ends of the circumferential portion of said beaded portion forming rocker points, said container member being provided with an insealing protuberance extending circumferentially about said container member and above said beaded portion, the highest point of said sealing protuberance being adjacent said indentation and the lowest point thereof being diametrically opposite said highest point and adjacent the midpoint of said beaded portion, the rim portion of said container member above said sealing protuberance being bent inwardly, the outer diameter of said sealing protuberance being greater than the inner diameter of said lid member whereby said container member may be effectively sealed by said lid member, said lid member being easily removable by slight pressure on the lid adjacent said indentation.

EDWIN RALPH ROSSITER.

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