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Патент USA US2128893

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Sept. 6, 1933-
Filed July 27, 1954
Patented ‘Sept, e, 1938
Samuel Bergstein, Cincinnati, Ohio, assignor to
Edna May Bergsteinand Robert Morris Berg
stein, as trustees
Application July 27, 1934, Serial‘ No. 137,286
3 Claims.» (CL 229-—1'l) I
My invention relates to cartons made of paper
stock, and more‘ especially to such cartons which
are adapted to contain liquids, as well as such
cartons adapted to contain dry materials, and in
5 any case to be air and liquid tight. In'my Pat- i
ents 1,974,256, Sept. 18, 1934, 1,976,980,0ct. 16,
1934 and 2,074,357, Mar. 23, 1937; I disclose .and
claim cartons adapted for these purposes; the
improvement in the ?rst-mentioned application
being in the making of such cartons so that the
crevices at the corners and corner edges of
their ends where the flaps are ‘folded together,
’ are effectively hermetically sealed and reinforced
a powdered form, and also to exclude air and
moisture, or retain theproperties of the packed
material, such as moisture or grease content, or
aroma of the materials.
A further object of my invention is to produce
a carton answering to the above requirements, -
and in general constructed as disclosed and
claimed in my above mentioned Patent 2,074,357
01’ Mar. 23, 1937, in which the ?lling and empty
ing opening not only is located close to one
corner of the end of the carton, but in which the 10
closing flap which seals this opening is made with
parts which are readily separated, one part being
so as to sustain the sealed condition; and in local to said opening and being readily detach
15 my last-mentioned copending application I dis- . able to \swing open without disturbing the other 1
close and claim cartons which not only are sealed parts of the ?ap. The object of this just-men
at their end edges and corners as just above tioned improvement is not only to facilitate open- _
noted, but I have all of the flaps at one end ing, but to increase the facility of secure sealing
and strong reinforcement at the edges and
corners of the end having the opening, includ- 20
at the other end are likewise closed and sealed, ing the reinforcement of this sectional ?ap in its
and have a ?lling and emptying opening which ’ closed and sealed relation to the other end parts
is closed by a main ?ap that is effectively sealed of the container.
Other objects will appear in the course of the
following description, illustrated by the accom- 25
My present invention embodies all of the prin
panying drawing, in which
ciples disclosed and claimed in my above co
closed and effectively sealed in theljust men
20 tioned manner, while all ‘of the flaps except one
pending applications, and is an improvement
thereon in respect of certain details ‘of construc
tion of the carton.
Fig. 1 is a plan view of the blank for my ca -
ton having the ?nal closing ?ap adapted to have
a section only opened.
Fig. 2 is a perspective view of the top part of 30
30 ' It is necessary therefore that the container be I
of such substantial and closed construction at my carton, with the section of the ?ap opened.
In Figs. 1, and 2 is shown a modi?cation of
the ?ap edges and corners where the flaps fold
across each other as to allow no passage of the. the usual closure flap of the‘ carton. It will
thin coating while it is being applied, and no be understood that the carton with this modi?
35 breakage of it after it has fully set, under weight cation may be made according to the methods, 35
and with any of the proo?ng mediums, inside
or impacts. It must be such as to perfectly sup
port the coating so that it cannot be cracked or and outside, or either, that have previously been
described. The difference between this example
loosened, or otherwise impaired.
of Figs. 1 and 2 and other types. of cartons, is
The methods disclosed in my above noted pat
that the flap Hie, which is the ?nal closing ?ap, 40
40 cuts provide the means for insuring this reliable '
provided with a subsidiary ?ap local to the
support of the coating; but in those applications
the particular character of the covering of the
carton surface was not dwelt upon. My inven
tion is also appropriate for cartons that must be
45 tightly ‘wrapped, such cartons usually containing
dry substances; and the provisions forsustain
ing the wrapper are present in said copending ap
plications. It will, of course, be. understood that
- my present inventionis not limited to making
‘ 50- cartons for liquids, although especially adapted
for that; but that the especially strong construc
tion of cartons and the especially effective sealing
thereof makes them equally effective for packing
dry materials, so as to prevent sitting of such
55 materials from the carton~ if the materials be of
filling and emptying opening 2”. The ?ap [6e
has a slit Bl from ‘its free edge back toward its
hinge, terminating some distance short of the
hinge; and from the end of this slit or cut 6|, 45
at right-angles thereto, a line of‘perforations 62 1‘
extend to the lateral edge of the ?ap, past the
opening 2|}. These perforations 62 are not so
pronounced as to weaken the ?ap so much that,
it will not act as a unit in the operations of 50'
folding it, applying adhesive to it, and closing
it, in‘the methods previously described.
How- ‘
ever, when the flap I Be hasbeen closed and
sealed, the portion 63 or subsidiary flap, which
lies symmetrically to the opening 2|,f that it 55
closes,v may be pulled up and be detached fromv
and so formed as to leave a ?lling and emptying
the carton top surface surrounding the opening
opening in said end, and having a ?ap hinged
2H‘, and will break and hinge along the line of
perforations 82 as seen in Fig. 22. To facilitate
grasping it for this operation, this ?ap 63 pref
erably has a small tab 64‘ on its laterally outer
edge. This tab 64 is formed by cutting it out
of the ?ap “e as seen best in Fig. 1, leaving a
recess 65 in the edge of the flap Hie which is of
10 no consequence since this is one’ of the two ?aps
?rst folded in when‘ forming the closed top of
the ‘carton, and this recess is covered by ?ap
We as well as by the portion i6f of ?ap lGe that
remains attached when subsidiary ?ap 83 is
15 opened.
An important advantage of this con
struction-is that the portion 16f remaining in
tact, preserves the-reinforcement‘ along the edge
oi’ the carton top, and the crevice closures at
the corners 38', due to the use of the beads of
adhesive or sealing medium as before described
for the previous examples. It also makes a
neater package when opened. -It will be under—
stood that this example is applicable to cartons
for any of the uses, for oil, or for'milk, or other
.25 liquids, or for dry materials, previously men
It will be understood that latex may be used
as the ~interior coating of a liquid-holding car;
ton, instead of lacquer; as latex will e?ectively
resist liquid penetration, including oils. Even
3.0a mineral
oils will not be so active on it as to make
it unsuited for containers for such oils.
sealing material along adjacent to the hinging
of said ?ap to said end, which excessive amount
of sealing material fills the crevices at the cor
ners where the ?ap bends across the other ?aps,
said hinged ?ap having a subsidiary ?ap attached
to it along a line spaced in from the hinge of
the ?ap, and local to said opening, whereby this
subsidiary ?ap may be detached from the sur
face around the opening and. swung open to un
cover the opening, without disturbing the re
mainder of the ?ap or the excess adhesive along
the hinge and at the corners.
2. A paper carton having end ?aps interlap
ping and formed to leave an emptying opening
and having a main flap to seal across the afore 20
mentioned ?aps and close said opening, the part
oi’ said ?ap covering said opening formed as an
independent flap of rectangular shape having
a weakened line of attachment to said main
?ap whereby said independent flap may be sepa 25
rately detached to uncover said opening.
3. A paper carton having end ?aps interlap
ping and formed to leave an emptying opening
and having a main ?ap to seal across the afore
mentioned ?aps and close said opening, the part
of said ?ap covering said opening formed-as an _
independent flap of rectangular shape having
of synthetic resin are obtainable, which are very
a weakened line of attachment to said main
water and moisture proof. It will be under
stood that modi?cations other than those illus
trated and described may occur in practice, and
that I am not limited to the rather precise dis
?ap whereby said independent ?ap may be sepa
rately detached to uncover said opening, the 35
independent ?ap being so joined to said main
?ap that the main ?ap as a whole including the
independent ?ap may _be folded over and sealed
as a unit during the initial closure and sealing
of said main?ap.
closure herein, but what I claim as new and
desire to secure by Letters Patent is:
to said end and sealed to said end across said
opening by a practically thin film of adhesive
sealing material and by an excessive amount of CR
1. A paper. stock carton having at least one
end made up of interlapped ?aps se'aled together
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