US2936928A

US2936928A - Bail ear and body blank assembly

Info

Publication number: US2936928A
Application number: US805846A
Authority: US
Inventors: Henchert John
Original assignee: Continental Can Co Inc
Current assignee: Continental Can Co Inc
Priority date: 1955-09-26
Filing date: 1959-04-13
Publication date: 1960-05-17
Anticipated expiration: 1977-05-17

Description

May 17, 1960 J. HENCHERT 2,936,928

- BAIL EAR AND BODY BLANK ASSEMBLY Original Filed Sept. 26, 1955 2 Sheets-Sheet 1 Eliza- J1 a R f z .74

I \A' .9 20- 7 INVENTOR /ofifl flencizeri' May 17, 1960 J. HENCHERT 2,936,928

BAIL EAR AND BODY BLANK ASSEMBLY Original Filed Sept. 26, 1955 2 Sheets-Sheet 2 k/07Z7Z 17672072 erZ Mi fizz,

ATTORN E 35 v i d at a U 2,936,928 a v nan. EAR AND BODY BLANK ASSEMBLY John Henchert, River Forest, 111., assignor to Continental Can Company, Inc., New York, N.Y., a corporation ofNew York 1 V V 7 Original application September 26,1955, Serial-No.

536,655, now

Serial No. 805,846

Claims. (craze-91 Paint cans, painters buckets and'other sheet metal Patent No. 2,905,124, dated September. 22, 1959., Divided and this application April-13, 1959, 1

containers of the bucket type have long been equipped with ears for the attachment of carrying bails, and the present invention relates to the attachment of such ears to the body blanks from which the side walls of the containers are to be formed.

This application is a division of my copending application for US. Letters Patent Serial Number 536,655 filed September 26, 1955 and entitled Method of Attaching a Bail Ear, now Patent No. 2,905,124granted Sept. 22, 1959 and it covers the body blank and hail ear assembly disclosed in said copendingapplication, whereas said co- 2,936,928 time Ma 9 2 preferred domed and headed ear initially assembled with a recessed body blank in readiness for bead flattening to unite ear and blank. 1 I

Figure 3 is a view similar to Figure 2 showing the bead flattened and the previously cylindrical recess side wall deformed into interlocking engagement with the flattened head. t

Figures 4 and 5 are views similar to Figures 2 and 3 respectively but showing a construction in which the 0 head is formed by inward instead of outward curling of l. the base edge of the domed ear.

Figure 6 is a detail section of a portion of the recessed body blank showing that the boss on the recess bottom of the preceding views'may be omitted. Figures 7, 8, 9, 10 and 11 correspond to Figures 2 to 6, respectively, but disclose constructions in which the recess side wall is pre-shaped to engage the flattened bead.

In Figure 1, a' conventional paint can 1 has been shown, said can having domed ears 2 secured thereto, in accordance with the invention, for the attachment of a carrying bail 3. All other views show oneof the domed ears 2 and a portion of the body blank 4 from which the can wall is to be formed, in the positions which they preferably occupy during assembly, prior to shaping said body blank into can wall form;

In all examplesof the, invention herein disclosed, the

" sheet metal domed ear 2 is formed at its base edge with each ear is provided at its base edge with an external,

peripheral tubular bead. .Each body blank is provided i with a continuous wall for close concentric relation with the tubular bead -of the associated domed ear. The domed beaded ear and blank are relatively assembled and the tubular bead and continuous wall placed inthe aforesaid close concentric relation, and said tubular bead is then flattened in a direction to increase the radial dimension of said head and force it into interlocking engagement withsaid continuous wall.

The above mentioned continuous wall may becylindrical and when in this form it becomes deformed under the pressure exerted against it by the bead during flattening of the latter, thereby producing the desired interlocking relation of the wall and flattened bead. However, the wall may be preformed in the shape into which the aforesaid cylindrical wall will be deformed by the bead pressure, and the head will then engage the preformed wall when said bead is flattened. In either instance, the bead presents a rounded edge to the wall with no danger of rupturing the latter. Moreover, in either case, the connection of the domed ear to the body blank is effected without the necessity of clinching the continuous bead engaging wall over the bead.

The aforesaid continuous bead engaging wall is preferably the side wall of a shallow recess formed by depressing a portion of the body blank, and the bottom of this recess is preferably formed with a boss which prohibits contraction of the bead radially of the domed car during the bead flattening operation, thereby insuring forcible radial expansion of said bead into extremely tight interlocking engagement with said wall.

With the above and other objects in view that will hereinafter appear, the nature of the invention will be more clearly understood by reference to the following detailed description, the appended claims and the several views illustrated in the accompanying drawings.

In the drawings:

Figure 1 of the accompanying drawings is a side elevation showing a paint or similar can provided with bail ears in accordance with the present invention.

Figure 2 is an enlarged sectional view showing the a' continuous, external, tubular head 5, and the side wall 6 of said domed ear is preferably of cylindrical form. In'Figures 2 and 7, the head 5 is formed by an outward curl 7, whereas in Figures 4 and 9 the metal is first turned outwardly at 8 and then inwardly curled at 9 The sheet metal body blank 4, in all forms of the invention disclosed, is form'edivith a depressed portion 10 providing it with a shallow recess 11, said recess having a a bottom 12' and a continuous side wall 13. The bottom 12 is formed with a boss 14 in all views except Figures 6 and 11, said boss being in concentric relation with the recess side wall 13. This recess side wall 13 is of an internal diameter slightly greater than the beaded end of the domed ear 2 and the external diameter of the boss 14 corresponds to the internal diameter of the beaded ear side wall 6.

In Figures 2, 4 and 6 the recess side wall 13 is of cylindrical form and becomes deformed to the downwardly flared shape of Figures 3 and 5 under the pressure exerted by the bead 5 during deforming of said bead into the flat shape shown at 15. In Figures 7 to 11, however, the recess side wall 13 is pre-shaped into acute angular relation with the recess bottom 12, giving it the same initial shape as the final shape of the cylindrical recess side wall. In either instance, a curved fillet 16joins the recess side wall 13 and bottom 12, and another curved fillet 17 joins the boss 14 to said bottom 12.

In all cases in which the boss 14 is provided, the fillet 17 engages the inner periphery of the bead 5 when the ear 2 and blank 4 are brought into initially assembled relation. See Figures 2, 4, 7 and 9. The ear 2 is thus accurately positioned with its bead 5 resting evenly upon the recess bottom 12 in closely spaced concentric relation with the recess side wall 13. With the ear 2 and blank 4 thus initially assembled, the bead 5 is flattened by means of a press, one member of which is shown in broken lines at 18 in Figures 3, 5, 8 and 10.

During bead flattening, if the recess side wall 13 be cylindrical as in Figures 2, 4 and 6, the radial expansion of the head 5 caused by said flattening, exerts such pres sure against said wall 13 as to flare the latter to the shape of Figures 3 and 5, thus tightly interlocking said side wall 13 with the flattened head 15. If the recess side wall 13 be pre-flared as in Figures 7 to 11, flattening of the bead 5 (Figures 8 and 10) causes the flattened head 15 to inappreciable deformation of the latter. In either case,'the

union of ear 2 and blank 4 is eifected without danger of p c ng o other ise r pturing a y p t o of the b a k as e bcail has only smooth surfa s nta ing with sa'id'blank. More over, the union is highly eifective without requiring that the recess side wall'be clinched over the flattened bead. 7 It will be apparent by reference to 'Fignresfg, 5, 8 and 10 of the drawings that in each instance the flattening of the tubular 'bead' results in the provision of a doubled wall fold and the forcing thereof outwardly against the surrounding side wall'de fining the depressed portion 10.

In any form of the invention in which the 'boss14 is employed, this boss holds the head against any contrac tion radially of the ear 2, during the bead flattening operation, thus increasing the radial expansion of said head into extremely tight interlocking relation "with the recess side wall 13.

In the completed structure (Figures 3, 5, 8 and the transversely curved outer edge 19 of the flattened head tightly engages the fillet 16' but may yield slightly thereon during curving of the body blank 4 into cylindrical shape to form the container side wall. The union of ear 2 and blank 4 will not therefore interfere with this operation and a truly cylindrical shape may be imparted to the container side wall.

From the foregoing it will be seen that novel and advantageous provision has been disclosed for attaining the desired ends. However, attention is invited to the possibility of making variations within the scope of the invention as claimed hereinafter.

I claim:

1. In a body blank, and hail ear assembly, a sheet metal body blank having a depressed portion providing a shallow external recess, said recess having a bottom and a continuous side wall at an acute angle to said bottom, and a domed sheet metal bail ear, said domed bail ear having a flattened tube bead on its base and seated upon said bottom, said flattened bead having a doubled fold wall providing a transversely curved peripheral edge seated in the angle between said bottom and side wall, thereby tenaciously connecting the domed ear to the body blank with no danger of said bead edge cutting the blank a 4 portions contacting therewith, and establishing this connection without the necessity of inwardly clinching any portion of said side wall over said head.

2. A structure as specified in claim 1 in which said depressed portion of said body .blank is provided with a curved fillet at the juncture of said bottom and side wall, said filletconforming to and tightly contacting with said said flattened bead. V

3. A structure as specified in claim 1 injwhich said recess' bottom is provided with a boss, said boss having a peripheral edge abutting t-helinner periphery of the beaded doubled fold wall transversely curved peripheral edge of side wall of saiddomed eaig'ithere'by holding said flattened bead against. inward movement from said said recess.

4. A structure-as specified in claim 1 in which said depressed portion of said body blank is provided with a curved fillet at the juncture of said bottom and vside wall, said fillet conforming to and tightly contacting with said transversely curved peripheral edge'of said flattened head, said recess bottom being provided with a boss, said boss having a peripheral edge abutting the inner periphery of the beaded side wall of said domed ear, thereby holding said flattened head against inward movement from said fillet.

5. A structure. as specified in claim 1 in which said recess bottom isprovided with .a boss, said boss having a peripheral edge abutting the inner periphery of the beaded, side wall of said domed, ear, thereby holding said flattened head against inward movement from said side wall of said recess, said acutely angled side wall opposing said boss and surrounding the same in'concentric relationto side wall" of cooperate therewith informing a restricted channel in which the flattened bead is locked, against displacement.

References Cited in the file of this patent