US2313198A - Key-opening can - Google Patents

Description

M 1943- N. J. HAUVSTRU'P KEY-OPENING CAN Filed June 20, 1939 3mm usirup Patented Mar. 9, 1943 KEY-OPENING CAN Niels Johannes Haustmp, Tolderlundsvei, Odcnsc, Denmark; vested in the Alien Property Custodlan Application June 20, 1989, Serial No. 280,189 In Denmark July 4, 1938 2 Claims. (Cl. 220-54) My invention relates to certain new and useful improvements in metallic cans or boxes of the type having a weakened line at which a portion at least of the can maybe removed by means of a key on which theremovable portion iswound and by which it is torn loose along the weakened line.

The present invention resides in the provision of a weakened line formed with a Z-shaped curve to provide two inter-projecting-tongues, one of which may easily be bent inwardly and detached sufliciently to permit insertion of a specially formed key that also comprises apart of my invention.

Further, the invention resides in the provision of a pair of spaced grooves or ridges between which a prong of the key lies when in position for opening the can or box and by which the key is kept in place while starting the tear and during the rolling up of the cover.

part be pointed out hereinafter.

To the attainment of the aforesaid objects and ends the invention still further resides in the novel details of construction, combination and arrangement of parts, all of which will be first fully Gil strument tongue I may first be torn loose and bent v in (see Fig. 7) so that the longer tang I3 of the key Ill may be inserted under the top part 4 between the parallel ridges 8 and 9, while the shorter tong li lies over the top part 4, as shown in Fig. 2.

After inserting the key, as shown in Fig. 2,

and turning it counter-clockwise, the portion 4 Other objects will in part be obvious and in-' .of the top I may be torn loose and rolled up, as shown in Fig. 3.

Several forms of keys are shown, all of which, however, have a forked end constituted by the spaced tangs I2, I3, or I2, I3, and all including a rod portion III, or III or III and a loop II, II or I l as the case may be.

All forms also preferably have their tangs bevelcut as at l4, I4' or I4, as the case may be, so

described in the following detailed description,

and then be particularly pointed out in the appended claims, reference being had to the accompanying drawing, in which:

Fig. 1 is a top plan view of a can or box em- Fig. 6 is a detail section showing how a key may be used to bend down and detach the tongue I from the cover for insertion of a key.

Fig. 7 is a view similar to Fig. 6, showing another form of key and showing the tongue I detached from the cover.

In the drawing, in which like numbers and letters of reference indicate like parts in all the figures, I is the top of the box which is seamed at 3 to the body 2 of the box in the usual way. The top I is provided with a weakened line 5 conforming generally to the outline of the box, and at one comer (preferably) the line 5 assumes a Z-s'haped curve, thereby to provide two tongues 6 and 1 extending in opposite directions, the tongue 6 being part of that portion 4 of the that if desired the sharp edges of tang I3 can be used to pierce the weakened line between tongue I and the top portion 4 in inserting the key.

The simplest form of key is that shown in Figs. 2 to 5, inclusive.

The key shown in Fig. 6 has a sharpened end I8 to its loop I I and is shaped to permit placing that end under the bead 3, while a-portion II, of the key is bent to form a toe I! to press down on tongue I when the key is used as a lever with IE as the fulcrum. The key is further bent to form The key of Fig. '1 simply has the toe I5 and its I rod I 0 lies straight so that its forked end Il -I 3* will serve, by contacting the top part 4, as a stop.

l. A generally rectangular can having curved corners and having a top provided with a continuous weakened tear-lineadjacent and following the margin of the can throughout substantially its entire length, a portion of said line which is adjacent one corner of the can being of the.

outline of a curved Z to form two tongues, one of which extends in one direction and the other of manently attached to the can and the other beinl 2' mars es an integral part oi that of the cover which istobetorn loose.

2. A generally rectangular can having curved corners and having a top provided with a continuous weakened tear-line adjacent and following the margin 01' the can throughout substantially its entire length, a portion of said line which is adjacent one corner 0! the can being of the outline of a curved z to form two tongues, one of which extends in one direction and the other of which extends in the opposite direction, the

directions in which the tongues extend being (11- agonally across said corner, one tongue being permanently attached to the can and the other be- NIELS J OHANNES HAUSTRUP.

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