Special receptacle or package – With pallet feature – Knockdown or collapsible type
Patent
1979-11-13
1985-02-26
Garbe, Stephen P.
Special receptacle or package
With pallet feature
Knockdown or collapsible type
206628, B65D 570
Patent
active
045013640
DESCRIPTION:
BRIEF SUMMARY
This invention relates to folding boxes, e.g. pellet cartons, of the common type having an openable end flap, the outer end of which is provided with a free holding flap which, when the end flap is closed, is put down along the inside of the box front panel opposite the rear panel, to which the end flap is hinged. This carton type is very popular, because it is easy to produce at low costs and easy to handle by opening and reclosing, the said holding flap serving to stabilize the end flap in its closed position in a reasonably good manner. However, since the carton is very easy to open it is often desired to provide the cartons with some kind of a breakable guarantee seal, but so far no practical seal means formed integrally with the carton have been proposed, and the most common solution has been to pack the filled and closed carton in a sheet wrapping which is closed about the carton and normally provided with a seizable rupture strip.
It is the purpose of the invention to provide a carton of the said type, in which a guarantee seal means is provided in an advantageous manner as an integral portion of the carton blank.
According to the invention this is acheived by the carton being designed with a cover portion the end flap of which will be openable only after a breaking up, wholly or partly, of the cover portion, such that this will constitute a guarantee seal, which, however, will not prevent quite normal use of the carton once it has been broken the first time the carton is opened.
The invention also comprises such carton blanks which are designed in such a manner that upon the erection and closing thereof they appear as cartons having the said cover portion constituting a guarantee closure for the openable end flap.
The invention is described in more detail in the following with reference to the accompanying drawings, in which:
FIG. 1 is a plan view of a blank for a carton according to a preferred embodiment of the invention,
FIG. 2 is a perspective side view of the carton in four stages of partial erection, and
FIGS. 3-5 are perspective topviews of the carton illustrating the manner of opening of the carton.
The blank shown in FIG. 1 is basically of well known design inasfar as it includes a front panel 2, a bottom panel 4, a rear panel 6, opposed inner side panels 8, opposed outer side panels 10, bottom corner flaps 12, top corner flaps 14 connected with the inner panels 8, a top end flap 16 hinged to the top (outer) end of the rear panel 6, and a holding flap 18 forming an extension of the top end flap 16. Briefly, the blank is erectable into a well known box shape as illustrated in FIG. 5, which shows the carton top in opened condition. However, according to the present invention the front panel 2 is extended into a second top flap 20, and the outer side panels 10 are correspondingly extended into secondary top corners flaps 22 and 22', respectively. Generally, the latter portions 20, 22 and 22' are joined to the respective panels 2 and 10 across a precut weakening or tear up line a, and the corner flap 22' has a half circular tap portion 24 generally cut out in the material of the adjoining side panel 10, at the other side of the line a.
FIG. 2a shows an intermediate erection position of the box member in which the rear panel 6 forms the bottom in an open box structure ready to receive the material to be filled into the carton, the box end walls being stabilized in their vertical positions by outer support means of the filling machine (not shown), whereafter the "lid" structure shown in the left hand side of FIG. 2a is folded over the filled box, when the holding flap portion 18 has been folded inwardly as shown in dotted lines in FIG. 2b. Thereafter the panels 10 are folded down and secured to the outsides of the panels 8, by glueing, welding or otherwise, FIG. 2c. The corner flaps 22, 22' are folded down at the same time, and thereafter they are separately folded inwardly without being secured to the outside of the end flap 16 (FIG. 2d). Finally the flap 20 is folded down and secured to the ou
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patent: 637397 (1899-11-01), Lynch
patent: 2294964 (1942-09-01), Davidson
patent: 2358923 (1944-09-01), Guyer
patent: 2364439 (1944-12-01), Guyer
patent: 2367706 (1945-01-01), Williamson
patent: 3097785 (1963-07-01), Meyers
patent: 3251530 (1966-05-01), Hodgkins
patent: 3570745 (1971-03-01), Fuse-shi
patent: 3606135 (1971-09-01), Rosenburg, Jr.
Brdr. Schur International A/S
Garbe Stephen P.
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