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Патент USA US3061178

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3o,> 1962
Filed Jan. 8, 1960
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United States Patent O ” ice
Patented Oct. 30, 1962
' sheet is formed into an envelope as hereinafter described)
be on the inner side of the envelope.
Edward Alexander Yermalrotf, North Bergen, NJ., and
Charles Conrad Elsesser, láatonah, and Edward Patton
Lee, White Plains, NX., assignors to General Foods
Corporation, White Plains, N.Y., a corporation of Del
The inner surface of the sheet of material preferably
bears a thin layer of a sealing medium which, under the
»conditions of closure hereinafter defined, may be sealed
by application of heat or pressure or both. This inner
layer of sealing medium may be polyethylene, vinyl or
nitrocellulose. Commonly it will be vinyl. The thickness
Filed lan. S, 1960, Ser. No. 1,348
of the sealing layer may be .0005 to .0015, say .001 inch.
4 Claims. (Cl. 229-51)
10 Although it may be possible to dispose the sealing medium
only along the areas where sealing is to be effected, it is
This invention relates to a novel package and to a
preferred to completely cover the inner surface with seal
method of making the same. More specifically, it relates
to a package containing an easy opening device.
As is well-known to those skilled-in-the-art, a wide
variety of materials has been packaged in envelopes. It
has become particularly common to use envelopes or
pouches to package particulate materials typified by des
serts, confections, candies, or beverage powders. Al
though many advantages have heretofore been obtained
ing medium. This minimizes the possibility of an un
sealed edge and furthermore, with a moisture barrier
sealing medium such as polyethylene, it may permit attain
ment of an additional layer of protection.
lf desired, an additional outer overwrap may be pro
vided to serve as a base for decorative adornment of
printing. Commonly this may be paper having a thickness
by use of such envelopes, there have been numerous prob 20 of 0.001 to 0.003 inch, say 0.0025 inch.
In the preferred embodiment the envelope will be
lems which have not been completely resolved. Among
formed of a rectangular blank of sheeting which is folded
these may be noted the problems of mechanical strength,
together along a line parallel to one edge, preferably a
package integrity, elimination of pinholes in the walls,
proper sealing of edges, shelf life and general handle
shorter edge, so that, e.g. the shorter edges (and simul
ability, ease and economy of manufacture, ease of open
' taneously corresponding folded halves of the longer
edges) are superposed. These superposed edges may be
ing, etc.
sealed together as by heat and pressure to form a closed
Many of these individual problems may have been
solved in specific cases, but there is no single package
It is a particular feature of this invention that the
which is particularly characterized by economy of manu
facture, ease of opening, ease of pouring, and high degree 30 envelope contain, preferably at the folded edge rather
than at a sealed edge, a plurality of untwisted preferably
of protection of the contents. When envelopes had been
plastic monofilaments extending from one extremity toy
used for soluble coffees, it was found in particular that
the other of said edge and forming a tear-strip tape there
it was not possible to produce an envelope which was both
in. This edge will include the material discharge portion
easy to open and capable of serving as an efficient mois
of the envelope and preferably the material discharge por
ture barrier. Since soluble coffees are hygroscopic and
tion will be coextensive with this edge. The filaments of
readily cake in the presence of moisture, these envelopes
the tear-strip will preferably be non-wicking, strong, and
were not particularly suitable for this use.
heat resistant with respect to the heat needed to seal the
It is an object of this invention to provide a novel en
envelope. The preferred material of which the tear strip
velope and method of making the same. `Other objects
will be apparent to those skilled-in-the-art on inspection 40 may be fabricated may be Daeron.
The preferred tear strip tape will be characterized by
of the following description.
In accordance with certain of its aspects, the novel
a low denier (i.e. the Weight in grams per 9000 meters)
commonly 60-1000 preferably 130-220; by presence Vof „
package of this invention may comprise opposed side
pieces joined together at their outer edges to form an
a small number of filaments, commonly 20-40, and pref
envelope having a material discharge portion, each of said 45 erably 25-30; and by substantial freedom from twist,
side pieces including a moisture barrier layer, an inner
sealing medium layer on at least one of said side pieces
along at least a portion of said material discharge portion
measured as the number of twists per inch, this value be
ing zero. A typical tape which may be employed might
thus be designated 220/28/0.
Because of the composition of the tape and particularly
of said envelope, and as a tear strip a plurality of un
twisted filaments extending from one extremity to the 50 its untwisted character, the tape either is or assumes a flat
other of said material discharge portion and being firmly
configuration when it is sealed into place (Le. the fila
secured in said inner sealing medium at each terminus of
ments become substantially coplanar); this permits forma
said tear strip.
tion of the seal with minimum possibility of leakage.
According to certain of its more specific aspects, the
Maximum security sealing with minimum leakage is ob
envelope of this invention may be formed from a sheet 55 tained when the threads or monoñlaments are parallel andV
of material which includes a moisture barrier and a seal
uncrossed at the sealed ends; and preferably there will be
ing medium.
It is preferred'to form the moisture barrier of a com
bination of thin sheet of plastic with a thin sheet of
no overlapping ortwisting of monoiilaments anywhere
along the strip.
L»The tear strip will lbe embedded in the sealing medium
metallic foil. Typically the foil will be aluminum foil 60 preferably at its termini, which termini Will be sealed in
of thickness of 0.00035 to 0.0010, say 0.00035 inch.
each of two sealed edges. if desired, the tear strip may
Commonly the moisture barrier may also include a thin
sheet of plastic, most preferably polyethylene, and the
foil Will preferably be bonded to the plastic. Preferably
îbe embedded in and sealed in the sealing medium Aalong
the entire llength of the tear strip and the folded edge
may be further sealed as by application of heat and pres
the total thickness of the moisture barrier will be from 65
sure. Thus, in the preferred embodiment, the tear strip
0.0006 inch to 0.0075 inch, most preferably 0.00085 inch.
will rbe 4anchored in place 'by the sealing yaction of the seal
Use of the noted moisture barrier in combination with the
ing medium on the strip termini. lIt is `a feature of this
other elements herein noted also assists in retention with
invention that because of particular configuration -of the
in the package of volatile flavors or aroma-_as in the case
70 tear strip, its thinness, and general arrangement, it is
of an aromatized soluble coffee.
When the moisture barrier is formed of a plastic layer
and a metallic foil, preferably the latter will (when the
possible to construct an envelope which is characterized
by »a tight, leakproof seal and a positive opening action.
The package of this invention may be formed from a
sheet which in the preferred embodiment has a moisture
barrier layer including `a layer of plastic and a layer 0f
metal foil.
On the outer side, «adjacent to the plastic,
may be a layer of paper-overwrap ‘containing ka. desired
design; Iand the inner side may bear a layer `of sealing
medium. A roll of this sheet may be `continuously fed
to a folding mechanism which folds the sheet so that por
side Sealers 17 may apply heat and pressure to the sheet
thus sealing together spaced portions of the sheet, par
tially forming Ian envelope, ‘and sealing the tear strip tape
iat the sealed points. The partially `formed envelope may
then be advanced to a tape `anchoring operation at which
the portions of the tape which will be the termini are
securely anchored. This preferably includes contact with
‘an embossing Ior serrating unit 18, which presses against
the sheet with sufficient strength to deform the metal foil
tions of the inner sides bearing the sealing medium may
10 iayer whereby the metal and the tape become more se
be brought face-to-face with each other.
curely locked together. This permits the end pieces to
The tear strip tape, «commonly ‘a continuous filament
remain securely affixed to the tape when the tape is pulled
Daeron yarn such yas a 60-1000/20-40/0 yarn may be
to open the package.
passed from a roll into the lower portion of the folded
The envelope may also be slit simultaneously at opera
sheet and positioned to lie generally parallel to and im
mediately adjacent to the lower folded edge `of the folded 15 tion 18 to provide the slits 33 shown in FIGURE l, which
permit easy starting of the tearing operation.
sheet, the fiat tape lying Igenerally in a plane parallel to
The sheet may be advanced by friction drive roll 19
the opposed faces of the folded sheet. Dacron is a syn
and subsequently cut at 20 preferably into pairs of en
thetic polyester made from methyl terephthalate and ethyl
ene glycol.
velopes for convenience in filling. Each pair of envelopes
The `folded sheet containing the tape may be passed be 20 21 will be moved along by clips 22 to an envelope `open
ing station which may include envelope-opening-fingers
tween sealing devices positioned generally transverse to
23, and if desired a source 24 of an inertizing atmos
the di-rection of movement of the sheet; here portions of
phere, e.g. nitrogen. The `opened envelopes may be ad
the sheet are subjected to appropriate heat `and pressure to
vanced to filling stations 35 and 36 at each of which mate
seal thin strips lalong lines which will define the sides
of the package. Simultaneously with forming the sides, 25 rial may be admitted to the envelope from hoppers 25
and at each of which desired controlled atmosphere, e.g.
the termini yof the tear strip tape are sealed into rand
nitrogen, may be provided.
firmly anchored in the edges. Preferably the edge in
The filled packages may be closed by heat and pressure
which the termini 4are to be sealed may be deformed at
the point at which the termini are positioned. Because
sealing at 2'7 `and subsequently collected. If desired, the
of the particular configuration and small thickness of the 30 pairs of envelopes may be cut into single envelopes.
A typical envelope which may be produced in accord
tape, this seal may be easily made.
ance with this invention is disclosed in FIGURE l, which
Subsequent operations may include slitting the so-folded
specifically shows an unseparated pair of envelopes 21.
sheet into mono-envelopes or into an Iassembly containing
several envelopes, ñlling the envelopes with desired mate
As there shown each envelope includes a folded edge 23
inside `of which is a tear tape 29 which is secured `at its
rial, and sealing the open tops of the envelopes by appli
cation of heat :and pressure. These operations, `or some
of them, may be performed under inert gases such las
nitrogen or car-bon dioxide.
A specific embodiment of this invention is shown in the
attached drawing in which:
FIGURE 1 shows an elevation of lan unseparated pair
of the envelopes produced by one embodiment of this in
termini in the sealed area 30 of sealed edges 31 of en
velope 32. As shown each of edges 30 includes a slit 33
starting in the edge 31, generally directed toward folded
edge 23, and terminating short thereof. The envelope also
40 bears sealed edge 34.
FIGURE 2 generally discloses a cross-section of the
sealed end of the tear strip. As there shown, the tear
strip includes a plurality `of untwisted filaments 40 lying
generally fiat. On either side of the tear strip is a layer
41 of vinyl sealing medium which rigidly secures the strip
terminus 40 in place. It will be noted that the strip is
only secured at its ends. The vinyl sealing medium is
adjacent to the moisture barrier which in this embodi
ment includes a layer of aluminum foil 42 and a layer
FIGURE 2 shows a cross-section view taken through
the tear tape 29 in the lower portion of the envelope
along line 2_2 of FIGURE 1;
FIGURE 3 shows the tear tape of this invention after
it has been removed from the package; and
FIGURE 4 schematically shows one embodiment of
the process of forming the package of this invention.
50 of plastic, polyethylene 43.
In the specific embodiment `as shown in the drawing
The outer layer of paper 44 may bear appropriate
and with particular reference to FIGURE 4, 10 repre
marking. In this embodiment, the entire assembly will
sents a roll of sheeting which in this embodiment includes
be subjected to embossing, serration, or deforming, sche
(see FIGURE 2) a layer of paper which is 0.0025 inch
matically shown at 4S, to securely retain the tear strip
thick (and which weighs about 34 pounds per 3000 square 55 termini in place.
feet including printing); a layer of polyethylene which is
The assembled package may be readily opened by grasp
0.0007 inch thick (and which weighs about 10 pounds
ing the section of the envelope which overlies the end of
per 3000 square feet); Ia layer of aluminum foil which
the tear tape, tearing that portion of the envelope so
is 0.0005 inch thick (and weighs about 15 pounds per
that the slit 33 is extended until it meets the tape itself,
3000 square feet); ‘and a layer of vinyl which is 0.00010 60 and continuing to pull on the tape in the same general
inch thick (and weighs about 4 or 4.5 pounds per 3000
square feet).
FIGURE 3 discloses a typical tape which has been re
This roll of sheeting may lbe unrolled to form a flat
moved from the envelope. It includes generally triangular
strip 11 which may be passed over folding plough 12..
end pieces which were formed by the tear following along
Here the sheet is folded over on itself so that the vinyl
slit 33 and separating out portions of the immediately
sheetings on opposed faces are adjacent to each other.>
adjacent corner. rl`he tape itself includes a plurality of
The folded sheet 13 may ’be ‘advanced by guide -roller
filaments 40 more-or-less parallel to each other, substan
14. Preferably at a point subsequent to guide roller 14,
tially untwisted, and generally lying in a single plane.
the tear tape 15 may be fed to the system. In the pre
It will be apparent to those skilled-in-the-art that
ferred embodiment this may be a continuous filament of
numerous changes and modifications may be made, and
Daeron yarn, identified as 200/28/0 (i.e. 220 denier, 28
that the invention is not to be construed as limited to the
filaments, and no twist).
specific example herein disclosed in detail.
Guide means, not shown, may be used to position the
What is claimed is:
tear tape iadjacent to the folded bottom edge 16 »and gen
1. A package enclosing a quantity of a product re
erally parallel thereto. As the tape and sheet advance, 75 quiring gas and moisture protection comprising a gas
and moisture impermeable sealed envelope containing
the packaged material therein, said envelope including
rality of untwisted substantially coplanar contiguous iila
opposed side pieces of a gas and moisture impermeable
material joined together at their outer edges, the packaged
material being contained in the space between said side
pieces and said joined outer edges, at least one pair of
edge, the terminal portions `oí’ said filaments being secured
in the opposed outer edges adjacent said folded edge by
said inner sealing medium, said filaments being free of
opposed outer edges of said envelope including an inner
minal portions.
sealing medium layer on one of said side pieces, and as a
4. A package comprising a gas and moisture imper
meable sealed envelope and a quantity of packaged mate
ments extending across said space adjacent said folded
connection to the envelope intermediate said secured ter
tear strip a plurality of untwisted substantially coplanar
contiguous filaments firmly secured adjacent their ends
between said side pieces by said inner sealing medium, said
íilaments extending across said space and being free of
rial disposed therewithin, said envelope being formed
connection to the envelope intermediate said secured por
by the fold being joined together at one outer edge by the
fold line and being secured in sealed relation to each
2. A package enclosing a quantity of a product requir
ing gas and moisture protection comprising a gas and
moisture impermeable envelope including a single sheet
of gas and moisture impervious material folded in half, the
other along the other outer edges by an inner sealing
medium, said packaged material being contained in the
opposed side pieces produced by said folding being joined
ing a sheet of metal foil and a sheet of moisture-resistant
plastic bonded to said foil on one surface of said foil,
together at one outer edge by the fold line and being
secured together in sealed relation along the other outer
edges by an inner sealing medium layer on one of said
side pieces, the packaged material being contained in the
from a sheet of gas and moisture impermeable packaging
material folded in half, the opposed side pieces produced
space between said side pieces and said outer edges, said
packaging material comprising a moisture barrier includ»
said sealing medium being secured to the other surface
of said foil, and as a tear strip a plurality »of adjacent thin
ñlaments of substantially equal length firmly secured be
space between said side pieces and said outer edges, the
tween said side pieces at said fold line by said inner seal
ends of the folded edge being secured together by said 25 ing medium at the terminal portions of said filaments
sealing medium layer, and as a tear strip a plurality of
within the end portions of said fold, said íilaments being
untwisted substantially coplanar contiguous iilarnents ex
substantially untwisted at those lregions where they are
tending across said space adjacent said `folded edge, the
secured by said sealing medium and extending across said
terminal portions of said filaments being firmly secured
space and being free of connection to said envelope and
in the opposed outer edges adjacent said folded edge, said 30 to each other intermediate said secured regions and paral
iilaments being free of connection to the envelope inter
lel and uncrossed at said secured regions, said iilaments
mediate said secured terminal portions.
being suiiicient' in number and strength so that they will
3. A package for soluble coffee containing iiavor and
sever said packaging material when forced thereagainst
aroma volatiles comprising a single sheet of material
in a tearing direction.
folded in half to form opposed side pieces joined together 35
at one outer edge by the fold line, said sheet including an
aluminum foil layer having a thickness of 0.00035 to
0.0010 inch and an outer surface layer of polyethylene
plastic the side pieces being secured together along the
other outer edges by an inner sealing medium layer on 40
said side pieces to form a gas and moisture impermeable
sealed envelope having the soluble coffee contained in the
space between said side pieces ‘and said joined outer
edges, the ends of the folded edge being secured together
by said sealing medium layer, and as a tear strip a plu 45
References Cited in the iile of this patent
Lacroix et al. __________ __ Oct. 5, 1915
Prindle ______________ __ Dec. 11, 1934
Schlumbohrn _________ __ Dec. 2l, 1937
Stroop ______________ __ Aug. 25,
Heywood ____________ -_ Dec. 26,
Parker et al. __________ __ Jan. 27,
Reynolds ...___s _______ __ Sept. 1,
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