Envelopes – wrappers – and paperboard boxes – Paperboard box – With closure for an access opening
Patent
1995-08-07
1997-06-03
Elkins, Gary E.
Envelopes, wrappers, and paperboard boxes
Paperboard box
With closure for an access opening
206273, 2291601, B65D 566
Patent
active
056345887
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field Of The Invention
The present invention relates to a carton box of the pastil box type and of the kind having a pivoting lid which, when closed, will engage with the associated box member in a snap locking manner. For pastil boxes for pocket use it can be a problem that a simple pivoting lid box can easily be opened unintentionally, and it should be ensured, therefore, that some locking function should occur, requiring a certain, modest and willful influencing on the lid for opening the lid.
2. Description of the Prior Art
There are already known different systems or designs for achieving a locking function, each with associated advantages and disadvantages, but the invention is directed to one of these systems, namely where the snap locking is established as an engagement between the outer edge of an exterior holding flap folded over from the front or top edge of the box body and an internally projecting locking edge on the front panel of the pivoting lid. When the pivoting lid is swung up about the upper, rear edge of the box the said locking edge will cause the bent over holding flap to be swung outwardly until it is swung out so far that it can no longer retain the lid against being swung up freely, and correspondingly the holding flap, when the lid is closed, will be brought into snap locking engagement with the locking edge at the inside of the front panel of the pivoting lid.
With this type of boxes it is possible to obtain a very efficient snap locking, but the same efficiency accounts for considerable problems in that even with small production tolerances rather large variations in the required opening force may be encountered. The boxes can be difficult to open.
Summary of the Invention
According to the invention it has been found that it is possible to remedy this drawback by a relatively modest modification, viz. by arranging for the front side edge portion, from which the holding flap projects, to be without any immediate folding or abutment connection with the adjacent side panels of the box, but to be free to yield resiliently inwardly all over its width, i.e. over the width of of the holding flap. This yielding or springing ability results in a considerably changed and for the user much more pleasant opening characteristic of the pivoting lid, which will not now be opened via a sharp or rigid closing edge, but via a resiliently yieldable closing edge that will oppose the initial opening, but thereafter promote the further opening, viz. by the returning of the resilient system. It is of major importance, however, that it is possible to absorb or tolerate relatively high tolerance deviations in the production of the boxes, since the user will hardly notice whether the discussed resiliency is somewhat more or less pronounced. Also, in a more important manner, the user can count on an effective snap locking of the closed pivoting lid without experiencing boxes, which, for the lid to be opened, should be subjected to no less than damaging force. Moreover, the user will feel a pleasant, springy co-opening force on the lid as soon as the locking engagement is released during the further opening of the pivot lid.
BRIEF DESCRIPTION OF THE DRAWINGS
In the following the invention is described in more detail with reference to the drawing, in which
FIG. 1 is a plan view of a blank for a box according to the invention,
FIGS. 2 and 3 are perspective view illustrating the erection of one end portion thereof,
FIGS. 4-6 are corresponding view illustrating the erection of the remainder of a box,
FIGS. 7-8 are lateral view, partly in section, illustrating the opening and closing movement of the the pivot lid; and
FIG. 9-15 illustrate other preferred embodiments of erecting a box in accordance with the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
In use of the box according to the invention it will normally will assume a lying or substantially horizontal position as shown in FIG. 5, i.e. with the box front side facing upwardly. However to the extent i
REFERENCES:
patent: 2982465 (1961-05-01), Fallert
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patent: 4048052 (1977-09-01), Tolaas
patent: 4083455 (1978-04-01), Keating, Jr.
patent: 4284197 (1981-08-01), Meyers
patent: 4948038 (1990-08-01), Moeller
patent: 5443202 (1995-08-01), Jorgensen-Beck et al.
J.o slashed.rgensen-Beck Frode
Lambach Heinrich W.
Elkins Gary E.
Schur Engineering A/S
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