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Патент USA US2142342

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Jan. 3, `1939. »
Filed nec. 24, 195s
lo' /8
M1 ‘D @m1, mm.
Patented Jan.l 3, 1939
Duryea Bensel, NewYork, _N. Y., assigner, by
mesne assignments, to Albert Borden, New
York, N. Y.
Application December 24, 1935, Serial No. 56,002 `
3 Claims.
(Ci. 229-43)
The present invention relates to cartons, and
has for its principal object the provision of means
within a carton for maintaining the flap closed
ends thereof in a sift proof, sealed condition, at
5 their contacting points.
The carton herein shown is made of paper
board, and as shown, is of standard known con
struction, and as will be described and shown, in
, detail, later, is provided with a simple means
10 whereby when the carton is ilnally closed and
glue-sealed, the normally open crevices of the flap
closed ends are sealed against the escape of ma
terial from within the carton, and'at the same
time the corners of the top and bottom ends or
at panels 4 and 6, are extended beyond the score
lines i and 2 to form glue _spots iS-'i 5’ and I8- '
Iâ' on the spaced wider flaps S-ii and 9’---ii’
respectively, so that when the sifting strip is ap
plied over the score lines i and 2, about midway of 5 `
its width,'the portion along the surfaces inside of
the edges ißand 20, Fig. 1, will be spotted to re- '
tain that marginal portion of the sifting strip, as
at i6, Figs. 2 and 3 from falling inward during
the closing operation. The free marginal por- 10i
tions of> the sifting strips between the glue spots
I5--I6 and i5’--i6' are also held from disar
rangement, when in the dat, 'for shipping.
As the sealing strips A-B are run down upun
. and pressed onto said glue strips in such a man- l
15 the closure are rendered rupture proof.
'I'he foregoing, and other features of advantage ner that a portion, of each strip,` unglued, lies
over the flaps, and therefore, this portion of the
will be apprehended as the herein description pro
ceeds, and it will be obvious that modiñcations strips is free and unattached, except at the glue
spots, as just described.
may be made in the structure herein, without de
As viewed in Fig. 1, the upper strip C is glued 20
20 parting from the spirit hereof or the scope of the
to the body panels by its lower half 2l and the
appended claims.
lower strip D-is glued to the carton by its upper Y
In the drawing,
half 22.
Fig. `l is a layout of the blank of a carton;
Then the carton is folded iiat on its score line '
Fig. 2 is a fragmentary -perspective view of a.
g, the glue lap 1 is folded on its score line e and 25
25 carton, erected, and in the act of being closed:
is then glued and is affixed on the inner surface
Fig. 3 is a view similar to Fig. 2, showing a fur
of the body panel 6, adjacent the edge i.
ther stage in closing;
In overfolding and attaching the glue lap ‘l to
Fig. 4 is a fragmentary perspective view of
the inner surface of the panel 6 at i, the glue lap
the carton closed;
30 Fig. 5 is a section, taken on the line 5-5, Fig. carriesrwith it, the extended ends I3-I4 of theßû
sifter strips A and B, which are partially glued to
4, looking in the directionof the arrows;
Fig. 6 is a fragmentary, reduced plan view of a ‘the inner face of the glue lap 'I by the extension
blank layout of modified construction; and Fig. '7 of the glue strips I and 2 upon thev glue lap. Thus
is a fragmentary view of a carton corner of Fig. 6 when the glue lap is afñxed, the extensions I3 and
V35 when closed.
' I4 of the sifting strip are also infolded over and 35
The present carton, as disclosed in the blank
around the corners formed at the glue lap atthe
ñap junctures. and by overlapping the sifter strip
I layoutin Fig. 1, comprises four body forming pan
els 3, l, 5 and 5 and a glue lap -I, these all being ' at the corner faces I9 and 20, Figure 1, and as at
‘ defined from one another by score lines e, f, g and
40 h.
The closing flaps 8, 9, III, II and 8', 9'. I0' and
...I I ' are developed from the ends of the body pan
els, by associate common score lines I and 2. The
25, Fig. 2, the cut corners between flaps 8 and II,
and flaps 8' and I I' are reinforced by theoverlap- 40
ping of the ends of the sifter strip.
The carton is shipped in'thls ilat folded and
glued condition to the user, who erects the car- l
ton for filling and sealing.`
In the further showing, in Figs. 2 to 5 inclusive, 45
the upper-half of the carton is shown, it be- '
' d„said slits being terminated at the common score
ing understood, from the showing of the blank of
vlines I and 2.
- After the- completion of the >blank two crevice «Fig. '1, that both closable ends _of the carton may
and corner sealing paper strips A and B, Fig. v1 be alike.
In Fig 2, the carton shown erected into rec- 50
' 50 are then glued to the blank by glue strips C-D.
These glue strips are preferably placed on the tangular containing position, and having been
carton blank and are kept below and above the first closed at its bottom end, and filled, and in
common score lines I and 2, respectively, as the4 act of being closed.
As the sealing strips C and D, Fig. 1 are free
viewed in Fig. 1, such glue strips being shown by
, the'shaded zones C-D. The glue'strlps C and D, of the ñaps on their sealing portions Ilvand I'I 65 i»
naps, while hingedly scored from the body blanks
ß are cut from each other by slits such as a, b, c, and
respectively, and are by reason of the glue flap
ends I8 andv Il thereof being overlapped to the op
posite strip ends Il and 20, as at 25. Fig. 2. the
Having thus described my invention what is
claimed is:
1. A carton comprising sheet material cut,
` two strips are made continuous, and form a flex
scored and folded to form a carton including
ible, inner, foldable liner around the open inte
rior flap surfaces, the sealing strip being thus con
walls; inner and outer naps joining the ends of
said walls; adjacent ñaps, when the sheet is flat,
contacting and being separated by slits alined
tinuous at the corners and therebetween.
When closing ñap il is first over-folded as in
Fig. 2, it carries down the adjacent continuous
portion of the sealing flap, bending down 'a por
tion of the sealing flap adjacent closing flaps 8
and I I, angularly, as at 2l-21. Fig. 2.
with the `corner scores of the walls; a sift-proof
lining adhered continuously along the end mar
gins of the walls and extending against the flaps. 10
and secured to the outer ilaps at a central portion
of the flap; said lining at said inner flaps and the
end areas of the outer flaps being unsecured; said
Similarly when opposite flap l is bent to clos
ing position, as in Fig. 3, it carries down a portion - portion being near enough to the ends of the outer
15 of the sealing flap adjacent to said closure ñap 8, flaps, tohold said lining ßrmly against the faces
bending a portion of said sealing strip adjacent of the inner ñaps when the inner flaps are closed;
the closing naps l and Ii, angularly. as at 2S and said slits extending near enough to the walls to
2s, Fig. 3, leaving the sealing flap portions which avoid interference with flap closing or flap tearing
are adjacent flaps i and Ii where spot glued, un
during closing; the slits being remote enough
20 closed, with their connecting corners folded at -from the walls to form an effective shock-absorb 20
angles at the four corners of the two closed flaps. ing, lining-protecting continuous reinforcing cor
Then while in this position, the two closed flaps ner web when the flaps are all closed; side and
t and I0 are glued all' over on their exposed faces, hinged vedges of the inner ilaps and all edges of
then flap 9 is folded down upon flaps B and III -the outer flaps extending substantially to said
and finally, the flap I i is folded down upon flap 9. walls and the entire top face of the- inner' ñaps 25
and thus the end closing operation is completed, being covered with adhesive and one outer flap
with the portions of the sifting strip on the flaps pressed thereon, whereby the lining is adhered
S-Ii and 9’-I I' held between two glued faces. the between two faces and rendered sift-proof.
spots IB-IG and Il'---II' and the glue upon the
2. A carton comprising a sheet of material
flaps 8 and IIS.
cut, scored and- folded to form-a carton including
During the closing down of the flaps ~8 and I0, body walls; inner and outer ilaps foldably joining`
the sifting strip. which is unscored, but _is of rel 'the ends of said walls; adjacent flaps, when the
atively thin- paper, tends to buckle at the free sheet is flat, contactingv and being separated by a
marginal portions of the strip adjacent the ñaps
slit alined with the corners of the carton; a sift~
` I and I I, and, for this reason the glue spots IB-_IB
and Il'--|ß' are utilized to uphold these portions
and thereby prevent this buckle and to permit of _
proof lining adhered continuously along the end
the angled corners 26, 21, 2l and 20 being readily
folded by the closure of the flaps 8 and I0. This
arrangement ensures positive action in automatic
machine operations of’closing this type of carton.
Fig. 5 illustrates, in amplified dimensions, the
sealed carton at the sectional line of [-5, Fig. 4,
the various superimposed elements of this sift
proof closure, and while thelspacings therein in
dicated are exaggerated for the purpose of east
reading, in actual practice the materials of the
carton -and sift proof seal being flexible, the su
perimposed coacting closure members are tightly
engaged with one another.
From the foregoing it will ‘be seen that all edges
and corners protected by the sift proofing strip
are held sift tight through the single and multiple
overlapping of the sift proof strip, at all points of
the folded overlapped flaps thereof.
In Fig. 6, there is shown a portion of a carton
blank, similar to Fig. 1, illustrating a further fea
ture of corner reinforcement, of the carton, in
which the indices of the various partsv are identi
cal with the showing in Fig. 1. In Fig. 6, the slits
b-c, by way of example, are shown as terminat
ing a distance j from the score lines I and 2. The
object of this is shown in Fig. '1, wherein, due to
the unslitted’ portions ì-i, which are 'provided
between‘all of the flaps 8, 9, Il and Il, and 8', 9',
margins of the walls and extending a distance
against the ñaps, and secured to the central por
tion of the outer flaps: said lining at said inner
flaps -and the end areas of vthe outer flaps being
unsecured; said portion of the outer ilaps extend
ing near enough to the ends of the outer flaps,
to hold said lining firmly against ‘the inner flaps
when the inner flaps are closed and each outer
ñap is open in the plane of its wall, whereby ad
hesive at the inner flap is unnecessary; said slits
being near enough to tlie walls to avoid interfer
ence with flap closing or flap tearing during clos
ing; thev slits being remote enough from the walls
to form an enective uncut-, full-thickness, com'
pressed, shock-absorbing lining-protecting, con-_
tinuous, sift-proof, reinforcing corner web when
the ñaps are closed; the outer ?aps extending at
all sides substantially to said walls, and the en
tire top face of the inner ñap being covered with
adhesive and an outer nap pressed thereon. where
by the lining is adhered between two faces and
rendered completely sift-proof.
3. A carton comprising a ñatsheet of material
cut, scored and folded to form a carton including
bod-y walls; inner and outer flaps foldably joining
the ends of said walls, adjacent flaps, when the
sheet is -flat, contacting and separated by slits
alined with the'corner scores of the walls; a pli
able sift-proof lining adhered continuously along
the end margins of the walls adjacent vto the ilaps
I0’ and II-’, of Fig. 1, the bending down of the _ and extending against the face of the naps a dis
flaps on their common score lines tand 2, to close tance from the walls, and secured to the outer
the carton causes the uncut corner sections j to flaps at an area extending from the inner margin
act as compressed webs i, Fig. 7, thus acting to -of the flaps to the outer edge of the lining; said
70 stiifen said corners and to render these corners lining at the end areas of the outer flaps being 70
` vsift-proof.
unsecured; the secured area at the outer flaps
-"Thus all of the corners on the carton are dou
extending near enough to the ends of the outer
bly reinforced, first by the compressed comer/webs
naps, to hold said lining ilrmly against the inner
1. and the diagonal folds 20, 21, 2l and 2l of the
sift strip, as well as being doubly sift proofed.
outer flap is open in the plane of its wall: said
flaps when the inner naps lare closed and each
slits extending near enough to the walls to avoid
interference with nap closing or nap tearing dur
innr closing.: the slits being remote enough fromv
the walls to form an eil'ective vshack-absorbing
continuous reinforcing corner web when the naps
are all closed, thereby to protect:- the lining at
the corners; the outer naps extending on all sides
substantially to said body walls; all parts oi' said
webs and flaps being the full thickness of the
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