US1771978A

US1771978A - Rim for tubs

Info

Publication number: US1771978A
Application number: US1351A
Authority: US
Inventors: William C Fork; William C Kronquest
Original assignee: Acme Steel Co
Current assignee: Acme Steel Co
Priority date: 1925-01-09
Filing date: 1925-01-09
Publication date: 1930-07-29
Anticipated expiration: 1947-07-29

Description

July 29,- 1930. w. c. Fmg sr AL 1,771,557@

RIM FOR TUBS 4Filed Jan. 9, 1925. 2 Sheets-Sheet. 1

July ,29,r 1930.- i yv. c. FORK E1' AL 1,771,978

RIM Fon 'russ Filed Jan. 9, 1925 v2 Shouts-shutl 2 J I "H www MMM il f i i J5 d '4769 vJ7 y 7 l j J6 J5 Patented July 29, 1930 WILLIAMefFenK Ann WILLIAM c. Kaoimuns'r, oroHIoAGo, ILLINOIS, AssIGNons TO ACME STEEL COMIVANY,

or CHICAGO,

ILLINOIS, A ooaronATIoN )or ILLINOIS RIM FOR TUBS Application led- January This invention relates to an improved process of forming rims adapted for useyon the covers of butter tubs and the like and to an improved construction y of such a rim.

The improved` process of forming rims herein described is claimed inapplicants copending divisional application Serial No. 137,720, filed September 25, 1926. Asfheretofore constructed, butter tubs have been l() made of wooden staves secured in position by means of hoops and the covers -of the tubs have been provided with wooden rims adapted to Iextend downwardly over the walls of the tubs. Thesewooden lrims are cylindrical in form and have a considerable vertical height so that they must necessarily be packed end to end when being shipped from the manufacturer to the user of the tub and they therefore occupy a large amount of n n space. It is the principal object'of the present invention to provide an improved metallic rim adapted particularly foruse on the covers of butter tubs. A further important object is to provide `an improved `process by er, which the improved rim may be conveniently and i cheaply formed from sheet metal. Still another important object of the invention is to provide a rim'of such formation that a large number of rims may be nested no one within the other to form a compact package. A-further object is to provide a process of forming the rim whereby the body of the rim is given a flared formation while., at the same time,` great strength is imparted ,as tothe rim so that it may be conveniently packed and eficiently used. Other` objects relate to various features of the process and of thek construction of the rima' such as will appear more fully hereinafter.

stood from the following specificationl taken with the accompanying drawings in which one method of forming the rim and one form of the construction thereof are disclosed.

ln'the drawings, Figure 1 shows a somewhat diagramma-tic side .elevation of a form ofapparatus which may be employed inthe process offforming the improved ring-Fig. n

2v shows an enlargedyside elevation of la portion ofthe .sheet metal band. which is formed The nature of the invention-will be under-y 9,1925.y serial No.' 1,351.

by the rst step ofthe process; Fig. 3 is an enlarged vertical section taken fon the line' 3 8 of Fig. lshow-ing.rv the vformation of the peripheralsurfaces of therolls whichjopernte on the sheet metal band after it has been formed as illustrated in Fig. 2; Fig. 4 shows an enlarged sectionalview taken on the line 4-t of Fig. 1, illustrating the means for corrugating the flange which is formed on the -band by the rolls illustrated in Figy; Fig. 5- is a sectional view taken on the line 55 of Fig. 1 showing the portions of the rolls by which the body portion of the sheet metal bandfis corrugated and given a flared formation;y Fig. 6 'is an` enlarged perspective view of a portion of the completed rim; Fig. f 7 is a perspective view of the complete 'rim in its finished form; Fig.V

8` is an enlarged.V vertical section taken through the axis of a butter tub illustrating the application of the improvedA rim thereto; Fig. 9 is a side elevation of a package of buttertub rims showing the nested relation thereof, apart of the kpackage being shown in vertical section; and Fig. 10 shows a perspective view of a butter tub havingv theimproved rim of the present invention applied to the cover thereof. i

In practicing the invention, it is desirable to form the rim from a bandr of sheet metal which. is relativelythinin order that the com` pleted rim may be manufactured at a relatively low cost to enable it to compete' with the wooden rims heretofore used. Various forms of apparatus may be employed in practicing the improved process, but, by way of illustration, there is shown in Fig. `1 a diagrammatic view of a series of rolls and cooperating apparatus which ma-y be a modification of the form of hoop making apparatus disclosed in U. S. Patent'No.1-,508,570, dated September 16, 1924.- Inthe operation of this apparatus, -a band 15 of sheet metal of suitable wiclth and thinness is fed from aroll byA means of' suitable power driven feeding rollers, not shown,v onto' a table, or guideway 16. IThe sheet metal` bandl'visintermittently brought `to rest on the' guideway 16 and-it is then operated onb'y akpair fof downwardly mov-.ing @wagers-17 :and18,(thep1unger ,17

' Atable 1 6 by rollers 30, this carrying a knife 19 and a punch 20, while the plunger 18 carries a punch 21 and a knife 22. The knife 19 cooperates with a cutting edge 23 on the guideway 16 to sever the band along the line 24, as shown in Fig. 2, thus severing aV strip'z25 of sheet metal which is of suitable length for forming the butter tub rim. The knife 19 is of such form that the severed edge24 is curvedadjacent one side o f the strip 25 as shown at 24?, thus leaving at the end of the body portion of the band 15 a sharp projection 26. This projection is cut from the end of the strip 25 "oy the knife 22 cooperating with the cutting edge l2 7 on the guideway 16. At the same time that the strip 25 is severed f roni the 'ba-iid 15 and the projection 26 is Icut from the end the strip, to forni a rounded surface 26a, the" punches 2O and21 operate to form in the strip 25 two holes 29 located adjacent the 'ends of the strip for engagement by nails or tacks when the rim is applied to the cover o'f the butter tub. After the strip 25 has been formed', it is fed longitudinallyV of the feeding operation occurring after th'e plungers 17 and 18 have been elevated, and the strip 25 is thereby 'caused to pass between two rolls 31 which are mounted on horiaontal axes and arranged to' coa'ct with the strip 25 to impart to it the forinilhlstrated in Fig. 3, where. tlie band 1 5 is''s hown having` a halfbead 32 of substantially semi-circularcross section at one edge thereof, while the other edgeis bent transversely tok form a flange 34. The halfbead 32 is formed bya projection 35 on one ofthe rolls 31 engaging the sheet metal of the band and forcing it Iinto a depression of siin'ilarfri'nation formed in the other roll 3l;- The flange 34 is formed by theA shoulder 379011 one of the rolls 31 overlapping the periphery of the other roll 31. After passing the rolls 31, the strip of sheet metal, having the cross section illustrated in Fig. 3, is' oporated on by a pair of corrugated rolls 38, mounted to revolve on vertical axes and arranged to operate only on the flange 34 of the strip so that this strip is corrugated, vas indicated in Fig. 47 during the passage of the strip between these rolls, the aires of these corrugations 39 ext ending transversely to the edge of the flange. V The thinness of the sheet metal permits itfto stretch sufficiently duringthe process of corrugation ,of the flange 34 withou'trbuckling or warping the body portiii-4O of the stri of sheet metal betweentheflnge 34 and tiehalf-bead 32, this body portion 4haviiiga width considerably1 4greater than 'thatof' the flange 34.

After the flange aa'has been corrugated', the strip 25 i s engaged bya pair of rolls 41 which are mounted trof revolvejon horizontal 1 and which are provided on their periph; eral surfaces with cerruations 4a 'The coil rgatiens' may be taper@ transversely of the wartete rolls or the axes of the rolls 41 may be relatively inclined to a slight extent so that the rolls 41 produce in 'the body portion 40 of the strip 25 a continuous series of corrugations 43 which decrease in depth from the corrugated flange 34 toward the halfbead 32, preferably disappearing entirely before the hallbead 32 is reached, as illustrated in Fig. .6. In the Aprocess of forming the tapered corrugations 43, the strip of sheet metal is contracted along and toward the edge on which the corrugated flange 34 vis formed so that the body portion of the sheet metal rim between the bead 32 and the flange 34 is flared outwardly from the corrugated flange, as illustrated in Fig. 7. The previous formation and corrugatioii of the flange 34 makes it possible to forni the tapered corrugations 43 without stretching the metal and' without buckling the flange 34 because the corrugations in the vflange 34 lend themselves to the contraction of that edge of the rim on which this flange is formed. The corrugating rolle 41 force the metal strip 25 upwardly overx the concave face of adie block 44 thus imparting td the strip the circular curvature of the coinp'leted rim 45, having the forni 'shown in Fig. 7. The provision of ,corrugations in the flange 34 and in the body portion of the riiii results in imparting great strength to the finished rim and also in giving it a flared formation which permits Athe nesting of the completed rims one within the other after they have been applied to the covers.

As shown in Figs'. 8, 9 and 10, the riin 45 is appliedto the wooden butter tub cover 46 with the corrugated flange 34 overlyin the upper surface of theV cover and withthe iared body portion seated against the corre 'sp'oiidinglyy flared edge surface 46a of the coverl The rim is secured to the cover by sniall nails or staples 47 which are driven through the body portion 40 of the iiiin iiito the edge of the cover, as shown in Fig. 10. rllh'e overlapping ends-of the riin are united by a nail or staples 48 driven throiigh'the holes 29 iiito the cover, or the holes 29 may be formed by thel driving of the nail or staple, a niethodwhich eliminates the difficulty of securing an alignment of holes -when the ends of lapped;

The' nested arrangement o f the co'inpleted rims is illustrated in F ig. 9 where a series f riins are shown applied to the covers 46 and mounted one within the 'other' with the flanges 34 extending inivardlyand the lialfl beads sa ideata one steve the @niet the outer side of the package Iii securing covers together in nieces-ted package, wodp blocks 1 9 may be mounted within the rifas, resting'on the upper cover 46, and sheet irietl snaps 50 bpasseuarouad the package and secured t'tlieblcks i iail 51.

the Vrim are over- The user of the eaters applies there ro nie previously formed lll!) butter tubs in the manner illustrated in the Figures 8 and l0. rlhe tub 53 is shown as comprising a plurality of staves 54 which are surrounded by a plurality of t sheet metal hoops 55 each of which is formed vwith a complete cylindrical bead 56 along its lower edge so that when the hoops are driven onto the tub from the bottom thereof, the edge of each hoop opposite the bead thereon is adapted to stretch sufficiently to permit the hoop to talle on a tapered or flared formation corresponding to that of the external surface of the tub. Then the cover is placed on the tub the rim 45 projects downwardly over the upper edge of the tub, thus preventing access of moisture and dust to the interior of the tub through the craclr between the cover and the upper ends of the staves 54.

It will be apparent that by means of the foregoing process, an improved sheet metal rim has been provided which may be manufactured at a sufficiently low cost and which possesses suflicient strength to compete successfully with other types of rims heretofore used. Not only does the improved rim possess increased strength and stiffness but it has a desirable flared formation which permits large numbers of them to be nested in a compact package for shipment.

Although one form of the improved rim and one method of forming it lhave been shown and described by way of illustration, it will be understood that the rim may have various forms and be formed in various ways within the scope of the appended claims.

Ve claim:

1. The combination with a tub cover of a rim having an outwardly and downwardly flared body portion extending below the lower edge of said cover and having a flat annular inwardly extending flange contacting with said cover from said body portion inwardly, said body portion being adapted to extend downwardly around the upper portion of a tub on which said cover is seated.

2. The combination with a tub cover having a peripheral edge surface in the form of a truncated cone having an annular surface flaring downwardly and outwardly, of a rim seated on said surface and secured to said cover and having its body portion outwardly flared and transversely corrugated. y

3. The combination with a tub cover hav.- ing a peripheral edge surface in the forni of a truncated cone, of a rim seated on said surface and secured to said cover and having its body portion outwardly flared and transversely corrugated, said corrugations being Y tapered transversely of the rim.

ll. The combination with a tub cov-er having a peripheral edge surface, of a rim comprising a circular sheet metal strip seated on and secured to said surface and provided with corrugations having their axe-s extending` transversely of said strip, said corrugations being tapered longitudinally of their axes.

5. The combination with a tub cover having a peripheral edge surface in the form of a truncated cone, of a rim comprising a circular sheet-metal strip seatedon and secured to said surface and provided with corrugations havingV their axes extending transversely of said strip, said cori'ugations lbeing tapered longitudinally of their axes.

6. A rim for tub covers comprising a body portion having an annular bead valong one edge and an annular flange along the other edge, the part of said rim between said flange and said bead being flared and corrugated.

7. A rim for tub covers comprising a body portion having an annular bead along one edge and an annular flange along the other edge, said body portion being corrugated between said bead and said flange, said corrugations having their axes extending transversely of said body portion and being tapered longitudinally of their axes to impart a flare to said rim.

8. The combination with a tub cover having a peripheral edge surface in the form of an upright truncated cone, of a rim comprising a circular sheet-metal strip flared downwardly and outwardly to seat on said edge surface of said cover, and means for securing said rim on said cover.

9. The combination with a tub cover `having a peripheraledge surface, of a rim secured to said cover and extending downwardly around and beyond said edge surface, said rim being provided with corrugations having their axes extending transversely of said rim, and a flange form-ed on said rim and seating on the upper surface of said cover, said flange being provided with corrugatioiis tapered transversely thereof.

10. The combination with a tub cover having .a peripheral edge surface, of a-rim secured to said cover and extending downwardly around and below said edge surface, said rim being provided with corrugations having their axes extending transversely of said rim and being tapered longitudinally to cause said rim to flare downwardly and outwardly, said rim being further provided with a bead around the lower edge thereof,

and a flange formed on the upper edge of said rim and seating on the upper surface of said cover, said flange being provided with tapered corrugations extending transversely thereof. f

WILLIAM C. FORK. WILLIAM C. KRONQUEST.