US1128231A - Food-preserving and like can. - Google Patents

Description

W A. DAVIDSON. FOOD PRESBRVING AND LIKE CAN.

AIPLIOATIQN FILED SEPT. 8. 1914- Patented Feb. 9, 1915.

THE NORRIS PETERS CO PHOTO-LITHQ. WS/izrlfifiw wiL'LIAM ALEXANDER nnvrnson, or wIcK, sco'rLAnii;

FOOD-PRESERVING AND LIKE CAN,

Specification of Letters Patent.

Application filed. September 8, 1914. Serial No. 860,677.

To all whom it may concern Be it known that I, WILLIAM ALEXANDER DAVIDSON, a subject of the King of .Great Britain, residing at Wick, Scotland, have invented new' and useful Improvements in F ood-Preserving and like Cans, of which the following is a specification.

This invention relates to improvements in food preserving and like cans, of the kind in which the body portion is so shaped that when the lid is removed no inwardly projecting rim or edge is left to prevent or obstruct the removal of the contents in an unbroken or entire condition, and the said invention also relates to cans of the kind comprising a lid soldered to thebody and arranged so that it can be wound off on a key in the known manner.

Now it has heretofore been proposed to so form the lid and body of a can that between these parts an annular trough is formed in which a packing is lodged beneath a wire which is finally attached by solder to the lid and body, the packing preventing the solder from directly attaching the lid to the body.

According to the present invention, a packing is arranged between the contents of the can and the joint along which the lid is soldered so as to prevent the solder or soldering flux from coming into contact with the contents of the can, the rim of the body portion, or the lid of the can being suitably shaped to receive this packing.

The accompanying drawing shows how the said invention may be conveniently and advantageously carried into practice.

In this drawing: Figure 1 is a plan view of the body of the improved can. Fig. 2 is a plan view of the lid thereof. Fig. 3 shows a central vertical section of the can with the lid thereof secured to the can body. Fig. 4 is a side elevation of the closed can. Fig. 5 is a view of a key suitable for winding off the lid from the can body. Fig. 6 shows a central vertical section of part of a modified constructional form of the improved can.

As shown in Figs. 1 and 3, the rim of the can body a is expanded and beaded to provide an annular trough or recess 7) in which a packing cord 0 waterproofed with wax, or other suitable material, is lodged. A lidd which when the can is closed is seated on this waterproofed cord, is formed with a flat edge e, fitting within the rim of the can body and resting on the cord 0. Within the flat edge e of the lid d a bead f is provided to form with the rim of the can body an annular channel to receive solder g securing. the lid to the body. Preferably the part receiving the packing cord 0, is enlarged at Patented Feb. 9, 1915. I

one part, as shown at h to allow the ends of the cord to be overlapped in the trough b so that it is not necessary to employ endless band packings. I As shown, the lid d is formed with a tongue 2' and the rim of the can body has a bent out part j above which the tongue i is placed when the lid is in position. This construction allows the part of the lid adj acent to the tongue 2' to be properly seated on the cord 0 from which this part of the lid would otherwise be held away by the rim on the outer side of the trough b holding the tongue 2' raised.

The bead 7 makes the lid more rigid than a flat lid and also insures a regular depth of the solder at the joint."

In use, after the can has been filled and a packing cord 0 placed in the trough b the lid d is placed in position and, held pressed on to the said cord while the solder g is applied around the trough b. This packing prevents the solder g from coming into contact with the contents of the can by flowing through the joint between the lid and the can body. The under side of the tongue is also soldered to the bent-out part j of the rim.

By employing suitablesolder, the lid can be removed by means of a key is such as is shown in Fig. 5, the tongue 21 being engaged in a slot Z in the key which is then rotated and strips off the lid in the well known manner.

Instead of removing the whole lid, the latter may be made with a line of weakness for example along the bead f, and the inner portion of the lid only is then removed by the key but the aperture thus formed is shown in Fig. 6, the can body a is made with an annular fiat surface m and an outer cylindrical flange n. The lid d7 has a bead 0 formed around its periphery. In this case the packing cord is placed in the bead o before the lid is applied to the can body. The lid when in position is secured by solder as hereinabove mentioned.

I claim 1. A food preserving can comprising a body portion having an outwardly flared edge a lid extending partly over the said edge, an annular trough being formed adjacent to the joint between said edge and lid and having an enlargement, and a packing of waterproof cord lodged in said trough and having overlapping ends lodged in said enlargement of the trough.

2. A food preserving can comprising a body having its mouth formed with an outceive overlapped ends of said cord, said ledge having an edge which is upturned except at -a point opposite to said enlargement, said edge at said point being bent outwardly and a lid fitted within the upturned edge of the ledge and having a tongue extending outwardly and overlying said outwardly bent portion of said edge.

WILLIAM ALEXANDER DAVIDSON. Witnesses:

LEROY W'ILBUR, FRED. M-IDDLELOR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner o1. Patents,

Washington, D. G.

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