US1940658A

US1940658A - Collar can and method of making same

Info

Publication number: US1940658A
Application number: US646325A
Authority: US
Inventors: Charles J Aulbach
Original assignee: Continental Can Co Inc
Current assignee: Continental Can Co Inc
Priority date: 1932-12-08
Filing date: 1932-12-08
Publication date: 1933-12-26
Anticipated expiration: 1950-12-26

Description

c. J. AULBACH COLLAR CAN AND METHOD OF MAKING SAME Filed Dec. 8, 1932 pa tenteci Dec. 26,

COLLAR can AND METHOD OF MAKING SAM Charles J. Aulbach, Syracuse, N. Y., assignor to Continental Can Company, Inc.,. New N. Y., a corporation of New York York,

Application December a, 1932. Serial No. 646,325

3 Claims.

The invention relates to new and useful improvenien'ts in a collar can, and the method of making the same;

An object of the invention is to provide a collar can wherein the inserted collar is held in the can through the gripping action of an outwardly rolled bead at the lower end of the collar having the raw edge thereof contacting with and biting into the wall of the can.

A further object of the invention is to provide a method of producing a collar can of the above type wherein the collar may be freely inserted in the can without unduly straining the same, and wherein the lower edge portion is brought into gripping contact with the can body 'wall by a forming die after the collar is placed.

In the drawing which shows by way of illustration one form of collar can and the method of making the samev Figure '1 is a sectional view showing the formed collar partly placed inthe container preparatoryto the seating and fixing of the collar in the can; g

Fig. 2 is a sectional view through the collar and can body and the dies used for seating the collar and shaping the lower end portionof the collar for contact with the walls of the'can, and

Fig. 3 is a sectional view through the finished can with the collar inserted and with an end secured thereto. p

The improvement in the collar'can will be first described, and then the method of forming the same. The collar can consists of a body portion 1 preferably of cylindrical form, to which a can end 2 is secured by a double seam 3. The wall of the can body is provided with a score line 4 and also a score line 5 setting off a tearing strip with the usual projecting tongue on which a key may be placed for rupturing the metal along the score lines, and thus disconnecting the end from the body portion.

Disposed within the can body is a collar 6 having a portion 7 intermediate the upper and lower edges thereof which contacts with the body wall below the lower score line 5. The collar is so dimensioned as to have a frictional grip on the body wall in this region. The collar above the portion '7 is inset, and at the upper edge portion is rolled inwardly as indicated at 8 so as to strengthen the upper edge of the collar and form a smooth edge. The can end 2 in the present embodiment of the invention has a depressed portion 9 forming a depending collar which lies between the inserted collar 6 in the body wall and servesas a reclosing means after the rip strip has been torn away. v

The new feature of the collar can resides in the means for holding the collar in place in the can. body. The can body wall is preferably formed without a bead therein. lhe lower portion of the collar is bent inwardly at 10 and thence outwardly at 11 with the upwardly extending portion so arranged that the raw edge of the metal.

will contact with the inner surface of the Wall of the can body. The ou'twardly bent portion is preferably die-formed after the collar is inserted in the can body, and the raw edge of the metal is forced into firm gripping contact with thewall of the can body. The edge is so disposed that it will hold the collar from either an inward or outward movement. in the can body. When.

formed after the collar has been initially placed in the can body. The lower edge portion 6 of the collar is initially formed so that it is substantially in line with the upper inset portion 6 of the collar. Iniact, the collar is initially formed of a diameter approximately that indicated at 6? and 6 and the portion therebetween is offset outwardly for contact with the wall of the can. By shaping thecollar thisway, the

oiiset portion contacting with the can may be dimensioned so as to make just the desired frictional contact with the can. a

There are advantages in the fianging of the can body at the same time when the collar is seated therein. By shaping the collar as described above, it may be readily inserted in the can body before said can body is fianged as shown in Fig. 1 of the drawing. The inset portion 6 will slip into the can body, and the inclined wall leading to the offset portion which contacts with the can body wall will direct the collar into the can body. The collar may be very easily pressed into the can body to the extent shown in Fig. 1. It is then submitted to forming dies, as shown in Fig. 2 of the drawing. The upper die member 12 is provided with a depending portion 13 inset from the outer edge predetermined distance from the top edge of the.

flange so that when the end 2 is placed on the can, said end will contact with the top edge of the collar. This gives a maximum capacity for the can. The can may be filled practically 'tothe top edge of the collar, and this is to a very slight distance below the inner face of thecan end 2. When the tearing strip'is removed, there will be no spilling of the contents, as the can has'capacity when the tearing strip is removed for the entire content sealed in the can.

beused for flanging the lower edgeof the can body. 'Said die member 17 has an extending portion18 which is curved at '19 for die shaping the lower edge portion of the can body wall. The fiangefformed isindicated at 26. There is a limiting wall '21"which" determines the length of the flange" formed at the bottom of the can. This serves also as an jabutment to prevent endwise movementjof' the can body when the collar is being forced intoithe can body by the upper die member; If it were not for this limiting wall, the ,fl anges mightlack uniformity, due to the fact that at the same time the upper flange is formed, the" collar is forced into frictional engagement with the can wall by the downward pressureof theupperdie member. The lower die memberl'lis providedwith a curling surface 22.1 The portion 6 of the collar passes along the vertical"wallj23fof the die member 17 and is'brought" into engagement with this, curling 'surface 22', which rolls the lower edge portion of the'collar'outwardly and forces the raw edge of themetal into biting contact with the inner walrof fthe' can body. This edge maybe embedded'inthewall "of the can body to a slight 'extentysoasto make a very tight joint between the collar and the can body, preventing leakage jof thecontents of the canpast said gripe ping line. Furthermorathis gripping contact pe'tween the'lower edgejof the collar and the "canjwallwill firmly hold thecollarfrom any end- "'I have also provided a very simple method of can-body.

There is also a lower diemember 17 which may" 'serting a formed collar intoisaid can bodylover producing this collar can, wherein the collar is forced into the can without undue frictional contact between the two, and is finally seated by dieshaping the lower edge portion to bring it into contact with the wall of the can. Furthermore, by my improved method, the flanges may be formed on the can body at the sametime that the collar is seated and attached thereto, and this will lock the collar a predetermined distance from the formed flange at the upper end of the While it is preferred to form the flanges when the collar is seated, it will be understood that the invention may be applied to the placing and seating of a collar by a forming die in the can body on which the flanges have already been formed;

l-laving'thus described the invention, what I claim-as new and desire to secure by Letters Patent, is-

1. A can comprising a cylindrical body having score lines forming a tearing strip, a collar: within said'body overlying the region of the tearing, strip, said collar having the central portion thereof in frictional engagement withfthecan body, and the lower portion thereof spaced inwardly. 1m) away from the can body and bent outwardlyiand-i. upwardly into said space so as to causeth'e'..-raw edge of the metal forming thewcollaritocontactgwith and grip the wall of the canbody, .saidic'an body aboveiand below the collar and inlthe; region thereof being of uniform diameterandfreefrom i inwardly and outwardly projecting portions.

2. The method of making a rip strip collar can... consisting in forming a cylindricalican body,1in-.

lying the rip stripwhich collar is dimensioned so as to have frictional gripping,contact.with..the

body wall intermediate the 'upper andlower edge portions of the collar, die-curlingthei loweriedgew portion of the collar outwardly and upwardly'l so as to cause'the extreme loweredge portion oithe. collar to grip the wall of the can. body-T hileW maintaining saidcan body below the collar and, in the region of the collar of uniformdiameter 3. The method of vmaking a ripstrip collar. can

as to havefrictional gripping ,contactswithiltheo, body wall intermediate the upper andlower-iedge,

portions of the collar, die,-curling the lower edge portion of the collanoutwardly and upwardlyifso. as to cause .the extreme lower edge portion'of the. collar to grip thejwall of the can body'whilejmaine taining said can body'below the "collarand'inthe region ofthe collar of uniform diameter; and die-i flangingthe upper edge "of thecanbody after" said collar has been inserted and simultaneously" with the curling of theloweredge of the collar.

M CHARLES J. AULBACH.