US1098444A - Can. - Google Patents

Description

A. G. I-NGALLS.

GAN.

APPLIGATIONPILBD MAR. 17, 1 913.

1,098,444. Patented June2,1914

` 1 UNITED- sTATns PATENT Nonirica,

ALLEN Gannrlvnn menus, or LAPRAIBJE, QUEBEC, CANADA, Assrenon or oNn- Hnnr 'ro CHARLES MAGKAY correu, or MONTREAL, QUEBEC; CANADA.

CAN.

l Specification of Letters Patent. v n Patentedgune 2, 1914..

Applica-tin led March 17, 1913. Serial No. 754,859.

To aZZ'wLom, it may concern Be it known that` I, ALLEN GARDINER I N- GnLLs, a subject of theKing otGreat Britain, and resident of Laprairie, in the Province of Quebec, in the Dominion of Canada, have invented' certain new and useful Improvements in Cans; and I do hereby del c lare that the following is a. full, clear, 'and exact description'of the same.

Theinvention relates to improvements in cans and particularly those canswhich are opened by the removal of a continuous strip around the side or end walls.

The invention consists essentially in the novel formation of the wall at the tearing.

, strip portion, whereby the metal is upset in tinuity of the strip formed by the weakening lines.

a way to avoid the destruction of the-com The objects 'of'the'invention are to 'obviate Athe necessity of' applying ordina-ry can openers to cans opened by a weakened part of the wall, to devise a simple reinforcement thatA will not increase the cost of forming theV tearing strip and generally to provide a can easy to open and therefore of little trouble' to consumers.

y Inv the drawings, Figure lis a perspectiveV viewl of a can showing the tearing vstrip formed on the side wall. Fig. 2'is a per-V lspec'tive view oi a blank showin ofl the invention. Fig. 3 is an en arged cross one form 'sectional view showing another ormof the invention. Fig. 4; is a perspective detail of ing lines.

a `portion of the can wall particularly showing the buttresses against V-shaped weaken- Like numerals of reference indicate corre-l spending parts 1n each figure. The diiiiculties experienced 1n various kinds of cans, whichare opened by winding a strip from the wall around a key;l have.

`made that means of opening far less generally applicable, than is the case where the strip, will without fail continue rolling around the key until the finish, inplace tearing 'acrosspartway, asit does so frequently' in the hands'of inexperienced persons or even experienced persons, `consequent-ly this invention has to do with so,

forming the metal 'of the can where the strip occurs 4that reinforcement is provided which directs the' line of' tear to .the weakening lines.v

g Referring to the drawings, 1 is the side key engaging awall of the can having the tearing strip 2 terminating in the tongue 3 at theseam of the tin. y

4 are V-shaped dents made in the metal ofthe wall, said dents 'forming the weakenlng lines. i

5 are thet buttresses formed agains'tlthe inner walls of the Vs and 6 are the' buttresses formed against the outer walls of the Vs, said buttresses being formed by a roller having transverse teeth meetingthe roller forming said dents and V,when appliedvclose enough forming transverse indents 7, thoueh the pressure maybe such as not to leave tie indents 7, merely .upsetting the metal' at the rise of the V-wa'lls, so as to turn 'said metal up into a buttress 5 or 6.

In Fig. 3', aiiat transverse surface is shown interrupted by a `plurality lot longitudinal dentsfl.

. In Fig, 2, the indents 7 are shown, and extend beyond the tearing strip at each side into the main port-ionsof the can-wall.`

4 It will now be seenthat the tearing strip is fiangedaon eachgside by a dent made in the metal.'V f

ThisI dent as a rule isV-shaped, though any kind of a dent may bemade and thisinvention is not limited toa V-shaped dent',Y 85

nor is it limited to a peculiar way of upsettingthe metal for the main feat-ure is to workthe metal between or beyond the outer weakening lines, so that the strip between said outer weakening lines shall not tear across during the actof opening and this is shown by upsetting the metal in such a way thatthe reinforcement directs the parting or tearing of the metal.l

`The buttresses are ofcourse an extremely -important feature inthis invention and the simple manner, in which they are made, has much to do'with the value of the invention, as they cause `no more, diiticulty in their formation than the ordinary method of making weakening lines, butthey do effect a great reinforcement, for they act as their name implies namely as a buttress, at veach side .of

the weakening lines, thereby directing the tearto the peak of the V, or in the case of other methods of forming the weakening lines directinglthe tea-r to the line between the outer end and inner buttresses.

In the case o-several'of the weakeningt lines being formed each line is ot courseI buttressed and while the tendency for line parallel guiding lines for a tearing strip completely around the can and transverse impressions extending between and into said impressions, Said Wall at the intersections of said impressions having protuberances formed bythe piling up of the metal against the slope of the Vs.

Signed at the city of Montreal, Quebec, Canada, this tenth day of March, 1913.

ALLEN GARDNER NGALLS. VVitnesses':

E. A. SEEE, C. PATERSAUDE.

Images