US3504821A

US3504821A - Box

Info

Publication number: US3504821A
Application number: US651519A
Authority: US
Inventors: Kees Wolbers
Original assignee: MIJ VOOR WASVERWERKING NV
Current assignee: MIJ VOOR WASVERWERKING NV; Voor Wasverwerking nv Mij
Priority date: 1966-07-08
Filing date: 1967-07-06
Publication date: 1970-04-07
Anticipated expiration: 1987-04-07
Also published as: NL6609611A; DE6609974U; BE700747A; DE1303572B

Description

April 7, 1970 K. WOLBERS 3,504,321

BOX

Filed July 6, 196'? United States Patent O'fi Patented Apr. 7, 1970 ice US. Cl. 22043 Claims ABSTRACT OF THE DISCLOSURE A box with a bottom section and a cover section fitting about said bottom section, which cover section has a pivot on said bottom section in order for the box to be opened when pressure is exerted on an edge thereof. The cover is provided with an indentation so that the upper rim of the bottom section may be gripped between the sidewall of the cover and said indentation in the snapped-open position of the box, thereby prevent ing the bottom section from slipping out of the users hand.

This invention relates to a box having a tilting cover. A box of this kind is known and is especially used for shoe polish, wax and similar materials. This known box comprises a bottom section and a cover fitting about said bottom section in telescopic fashion, the side Wall of said cover being slightly off-set radially inwardly at at least three points spaced from the lower edge thereof within a peripheral sector of the cover to provide a stop for the cover in its closed position to abut against the upper edge of the bottom section, and at the same time provide pivots thereon so that, when the sector of the cover located opposite the said peripheral sector of the cover is pushed further over the bottom section, the cover is caused to tilt out of its closed position about the line of separation between the two sectors.

It is drawback of such a box that, when it is pressed open, the box sections easily slip from the hand, as a result of which the contents of the box may drop on the floor, or some other inconvenience may be caused. This hampers the use of such box. It is an object of the invention to obviate this drawback.

A box according to this invention is characterized in that a projection facing the inside of the box is embossed in the upper section of the cover adjacent the periphery radially opposite the first-mentioned peripheral sector in which the inwardly off-set portion of the side wall is located, said projection, when the cover is tilted to its open position, engaging the bottom section at the inner side of the peripheral edge thereof.

As a result of this, the cover and bottom sections are automatically pressed into an interengaging position when the box is forced open. With the coherence resulting from that interengagement, the box sections can be readily and reliably held in one hand by mere pressure of the fingers.

It can be required of the type of box referred to in the beginning of this specification, wherein the lower edge of the side wall of the cover is headed radially outwardly and the bottom section is provided with a radially outwardly projecting peripheral pilot edge which slidably fits against the inner side of the wall of the cover, that it ensures a good sealing of the contents and still admits of being easily opened and closed, that it sulficiently retains its form to prevent cracks in the mass with which it is filled and to preserve its good sealing properties together with its easy manner of opening and closing, and that it can be manufactured in a very eflicient manner, while maintaining a uniform and high quality.

The prior art boxes of this type do not meet all of these requirements. Therefore it is a further object of this invention to make improvements in this respect as well. To that effect, according to this invention, the peripheral pilot edge of the bottom section is constituted by the outwardly beaded upper rim of the bottom section, the box consists of relatively thin material, and the angle at the center of the peripheral sector containing the radially inwardly off-set portions of the side wall of the cover is considerably more than This lastmentioned feature reduces the risk of an unintended loosening of the bottom and cover sections to a minimum. In a bottom section which is capable of being made in a single punch-and-draw stroke, the beaded mating surface comes up to very strict tolerances, so that an accurate fit in the cover, which is likewise capable of being made in a single punch-and-draw stroke and provided with a beaded edge, is ensured at all times. The beaded edge further imparts sufficient, yet resilient, dimensional stability to the bottom section and the cover, even if these sections are made of thin tinplate. Such dimensional stability is of course important for maintaining the good properties of the box during its life. The resiliency is important to meet simultaneously the requirement of proper sealing, which calls for a tight connection between the pilot edge of the bottom section and the wall of the cover, and a rather deep telescopic sliding of the cover over the bottom on the one hand; and the requirement that the box can be easily opened as the cover is being tilted on the other hand which requires deformation of the cover and the bottom section relating to each other, because during the tilting sliding-oh movement of the cover the line of contact between the pilot edge of the bottom section and the Wall of the cover is disposed in a plane which extends obliquely to the axis of the cover, and the cover does not tilt about a center line of the pilot edge owing to the position of the tilting axis, which is defined by the said sector angle.

It is favorable to the said resilient dimensional stability that the inwardly olf-set portions of the side wall of the cover at at least three points in the first-mentioned peripheral sector of the cover constitute a side wall portion which is continuously off-set inwardly throughout said peripheral sector, while the beaded edge of the bottom section can rigidly abut throughout the peripheral length of that sector in the corner of the profile formed in the side wall of the cover, and can still be released therefrom comparatively easily, partly because of the very slightly conically flaring configuration which is typical of a product obtained by drawing.

It is further favorable to the resiliency-dimensional stability effect that the side wall of the cover merges into the upper surface of the cover via a peripheral wall zone farther off-set radially inwardly than said first-mentioned side wall portions, and that the bottom surface of the bottom section is arched inwardly or outwardly from the periphery.

Both the bottom section and the cover can be made in a cost-saving manner in one stroke, while the beaded edges permit the use of thin tinplate, which 011 the one hand is also economical and on the other hand allows the combination of the technical advantages described hereinbefore, the pivots are rigid, the risk of damage to the tinplate and the lacquer during punching is negligible, and the risk of damage to the lacquer in the form of scratches any sharp edges might cause when the boxes are sorted out afterwards in a sorting machine does not exist because the boxes do not have sharp edges. This absence of sharp edges also enhances the safety in manufacturing, filling and using the boxes. Since the box section does not have a furrow or groove, but an entirely smooth side wall, the box can be easily emptied.

In illustration of the present invention one embodiment will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a top view of this embodiment;

FIG. 2 is a section taken along the line IIII in FIG. 1; and

FIG. 3 is a similar section with the cover tilted to the open position.

The box includes a bottom section 1 which is provided with an outwardly beaded end edge 2 of the side Wall 3 which, via an upwardly and inwardly olf-set marginal zone 4, merges into a bottom 5 shown in the drawings as a plane surface, which bottom, however, may also be somewhat arched either inwardly or outwardly, as is shown by the broken lines 6 and 6'.

A cover 7 is similarly constructed with an outwardly beaded end edge 8 of the side wall 9 which, in a higher peripheral zone 10, is ofl-set radially inwardly throughout the larger peripheral sector located between

points

11 and 12, and thus forms a stop shoulder 13 by which the cover 7 bears on the beaded edge 2 of the bottom section in the closed position of the box. In a transition zone 14 between the side wall 9 of the cover and the upper surface 15 of said cover, the side wall is again off-set radially inwardly. The upper surface 15 fits within the marginal zone 4 of the bottom section 1, which facilitates stacking of the boxes. The transition zone 14 is locally shifted farther inwards and embossed, so that the upper surface 15 has an off-set portion. This off-set portion indicates the place where the cover and the bottom section should be further compressed for the box to be opened, and constitutes a projection 16 facing the inside of the box, which projection, as may appear from FIG. 3, fits the bottom section 1 behind the beaded edge 2 when the box is pressed open, thus preventing the cover from sliding off the bottom section. When the box is being opened, the cover tilts about the pivots on the beaded edge 2 which are formed by the ends of the radially inwardly ofi-set peripheral zone located at 11 and 12. The broken line 17 shows an inwardly arched configuration for the upper surface, which is necessary for the outwardly arched construction of the bottom section as shown by the broken line 6' in order for the boxes to be properly stacked.

I claim:

1. A box comprising a bottom section and a cover fitting about said bottom section in telescopic fashion,

said cover having a side wall slightly off-set radially inwardly at at least three points spaced from the lower edge thereof within a peripheral sector of the cover to provide a stop for the cover to abut in closed position against the upper edge of the bottom section and at the same time provide pivots thereon so that, when the sector of the cover located opposite the said peripheral sector of the cover is pushed further over the bottom section, the cover is caused to tilt out of its closed position about the line of separation between the two sectors, said cover having an upper section and a projection facing the inside of the box in said upper section in the region adjacent the periphery radially opposite the first-mentioned peripheral sector in which the inwardly off-set portion of the side wall is located, said projection extending inwardly a sufiicient distance such that when the cover is tilted to open position, said projection engages the bottom section at the inner side of the peripheral edge thereof whereby the cover is prevented from sliding off the bottom section.

2. A box as claimed in claim 1 wherein said side wall of the cover has a lower edge which is beaded radially outwardly, the bottom section being provided with a radially outwardly projecting peripheral pilot edge which slidingly fits against the inner side of the wall of the cover, said peripheral pilot edge of the bottom section being constituted by an outwardly beaded upper rim of the bottom section, said box consisting of relatively thin material, the angle at the center of the peripheral sector containing the radially inwardly ofl -set portions of the side wall of the cover being considerably more than 3. A box as claimed in claim 1 wherein said inwardly off-set portions of the side wall of the cover at at least three points in the first-mentioned peripheral sector of the cover constitute a side wall portion which is continuously ofi-set inwardly throughout said peripheral sector.

4. A box as claimed in claim 1 wherein the side wall of the cover merges into the upper surface of the cover via a peripheral wall zone farther off-set radially inwardly than said first-mentioned side wall portions.

5. A box as claimed in claim 1 wherein the bottom surface of the bottom section has an arched configuration.

References Cited FOREIGN PATENTS 196,720 3/1938 Switzerland.

JAMES B. WARBERT, Primary Examiner