US859297A - Lock-side-seam key-opening can. - Google Patents

Description

. PATENTED JULY 9, 1907-- G. -P. HURLEY. LOCK SIDE SEAM KEY OPENING CAN.

APPLICATION FILED MAY 25, 1906.

[lb B 2 z fl UNITED STATES PATENT OFFICE.

CHARLES P. IIURLEY, OF CHICAGO, ILLINOIS NEW YORK, N. Y., A GORP LOGK-SIDE-SEAM KEY-OPEN IN G CAN.

No. 859,297. v Specification of Letters Patent.

Application filed May 25, 1906. Serial No. 318,

To all whom it may concern:

Be it known that I, CHARLES P. HURLEY, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in LockSide-Seam Key-Opening Cans, of which the. following is a specification.

This invention relates to improvements in key opening cans, and more particularly to improvements in lock seam key opening cans.

l0 Heretofore in the practical manufacture and use of lock seam key opening cans, such, for example, as shown and described in the Norton patent No: 539,366

or the McDonald patent No. 543,347, great difficulty has been experienced in making the cans hermetically tight at the point in the soldered side seam Where the tongue is located and where the scam instead of being of a true lock seam form is really of a lapseam form or composed of but three thicknesses. The leaks in the soldered seam at this point we have discovered are largely due to the cavity or open space left between the two inner folds of the lock seam and to the consequently imperfect contact between the lapping or tongue member of the seam and the adjacent fold of the seam at this point. And we have discovered and demonstrated by practical experiments that the difliculties heretofore experienced may be entirely avoided or overcome by forming the outer or lapping tongue mpmber with an exterior counter- I sink or depression so as tobring all three folds or thicknesses of the stock at the lapping or tongue portion in snug close contact with each other, time onabling perfect soldering to be performed. This external countersink or depression at the lapping tongue portion of the key'opening lock seam can is preferably formed of a truncated triangular shape corresponding to the notches at the base of the tongue in the inturned fold of the lock seam.

In the accompanying drawing forming a part of this specification, Figure 1 is a perspective view of a 4 0 lock seam key opening can body embodying our invention. Fig. 2 is a horizontal section on line 2-2 of Fig. 1. Fig. 3 is a vertical section enlarged on line 3-3 of Fig. 1. Fig. 4 is a detail view of the blank in the flat and Fig. 5 is a partial detail view of the blank after the hooks or edge folds are formed at the ends thereof, which are interengaged and bumped or squeezed together to form a lock seam.

In the drawing, A represents a lock seam key opening can body having the customary hooks or edge folds a a at the meeting ends of the blank which are hooked together or intcrengaged and then bumped or squeezed to form the lock side seam a of the can body.

B is the tearing strip having the customary project- ASSIGNOR TO AM TION OF NEW JERSEY.

IAN COMPANY, OF

Patented July 9, 1907.

off or bounded by scores or to adapt it to separate from the tearing strip is wound upon a The can body achside of the ferably to the depth rmit the hook to be the tongue band the ing tongue b and marked weakened lines b b can body when the wire or other key in t1 A is furnishe tongue b at the base th of the hook or re usual manner. (1 with notches b on e edge fold a to pe turned or folded without. folding parts to be properly together or The side seam a of fourfolds or thi length of the side s which spans the t the seam is composed of three drawing, the several thicknes are indicated, beginning from erence letters a a a a the thickness or fold a space extending across th notches b at the base thickness or fold a angular form, as w drawing. And to side seam at the p tearing strip or tongue to be snugl compressed together, we provide an external countersink A triangular form, the exten pression corresponding subs of the omitted [old a the side seam may b soldered hermetically tigh across the tearing strip a it will be understood, is composed ckn'esses of stock throughout the cam excepting for the ongue of the see or folds of the seam the outside by the refand it will be observed that d or wanting at the e tongue. Owing to the of the tongue, the omitted at the tongue is of a truncated triill be readily understood from the cause the three folds a a a of the extending across the y, firmly and closely the can body with preferably of a truncated of the countersink or detantially to the thickness at this part. By this means, uccessfully and practically t thrmlghout its entire length, nd tongue as well as at other ortion thereof opening can body having a A key opening sh locked edge folds or I i provided with i notches at the in cat metal can body having interiooks forming a lock a tongue tearing strip so of the tongue to the depth of the side scam, and

tearing strip, where or edge fold. said can body being provided with an external countersink or depression at the portion of theslde seam extending aeross the tearing strip and tongue. the several thicknesses or folds of the seam git. the tearing strip and tongue being in snug close contact with each other so that the seam may be closely soldered throughout its length, whereby leaks are prevented at the tongue tearing strip portion oi. tin-soldered side seam, substantially as specified. I

4. A key opening sheet metal (an body having inten looked edge folds or hooks formed a lock side seam. and provided with a tongue tearing strip furnished with notches at the base of the tongue to the depth of the hook or edge fold, said (all body being provided with an external countersink or depression at the portion of the slde'seam extending across the tearing strip and tongue to bring the several thicknesses or folds of the seam at the tearing strip and tongue in snug close contact with each other so that the seam may be closely soldered throughout its length, said countersink or depression in the (on body being of a truncated triangle form, substantially as specified.

CHARLES P. MU RLIGY.

Witnesses ii. M. MllNDAY, I). lllfllcown.

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