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Патент USA US2124231

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July 19, ‘1938. ~_
Filed Feb. 23, 1935
FIG. 3.
, 2,124,231
Patented July 19,1938 I
.Harvey G'.’ Kittredge and Frank W. Williams,
Dayton, Ohio, asslgnors to Foiliilm, Inc., Day
ton, Ohio, a corporation of Ohio
Application February 23, 1935, Serial No. 7,792
4 Claims. ‘(01. 229-87)
.025 inch. The fol] may be made of any of the
‘ Our invention relates to a new article of manu
standard metals for this purpose.‘
The structurally ‘strong supporting backing‘ for
facture for use as a cigarette. package.
It is the object of our invention to provide a
cigarette package that is impervious 'to moisture
5 and can be folded and sealed.
It is a further object to provide a cigarette
‘package which has a transparent window so that
the condition of the package can be observed.
_ It is our object to provide a structurally weak,
1o metallic foil reinforced with a transparent metal
adhering material that becomes plastic and ad
hesive under the application of slight‘pressure
and heat. Such a material in a cigarette pack
age makes it possible to eliminate multiple opera
15 tions in the formation of a package and makes it
possible to eliminate the paper wrapping on the
inside of tin foil, which is characteristic of the
present day cigarette package.
It is our object to provide a single ‘sheet of
20 material of reinforced tin foil and a further ob
‘ ject of‘providing such a. sheet in which certain
areas have no tin foil so as to provide transparent
windows through the backing material for the
tin foil that is thus left uncovered.
Referring to the drawing, Figure 1 is a vertical
. section through a, package having one end open
‘ and one end sealed, showing the composite struc
tural arrangement of the walls and thepackage.
‘This section is taken on the line l-l of Figure 2.
Figure 2 is an end elevation of the package
from the sealed end.
Figure 3 isa section on the line 3-3 of Fig
ure 4. It shows the modi?cation with a trans
parent window on the side walls of the package.
Figure 4 is an end elevation of the sealed end
of the package of Figure 3.‘
Figure 5 is 'a side elevation of the package of
Figure 3.
Referring to the drawing in detail, the pack
“) age is formed of a structurally weak tin foil des
ignated l to which is integrally joined a metal
adhering, syntheticresln material 2. This ma
terial is tough, metal-adherent, substantially
transparent and has a smooth surface that is
45 non-adherent to any object under ordinary con
ditions of temperature and pressure.
Upon heat being applied to the tin foil or its
structurally strong backing, this backing be
comes adhesive, and ‘upon the ends of the pack
' 50 age being folded as indicated, this material will
adhere to the adjacent metal surface and to it»
self, forming a ‘tight hermetical seal that keeps
the metal, may be made of a. variety of synthetic
resinous materials provided they have the char‘- 5
acteristics in‘ the compound of metal-adherence,
transparency, a hard, smooth, tough body at or-'
dinary temperatures, and the capacity for be
coming adhesive upon the application of slight
heat and slight pressure.
A- typical compound which. we have found
satisfactory is the following: ‘ '
We have found that among the materials that
provide for a tough body ?lm are cellulose ace
tate, cellulose'nitrate, vinyl acetate, vinyl acetate 15
polymerized, vinyl acetate modified with acetal
dehyde, and various other equivalent resins'that
are normally ?exible and hard and tough, but not
adherent to metal.
We have found that substances that are adher- 2°
ent to metal, but which are not ?exible, hard and
tough are such materials as a saturated-alkyd
resin. coumeron-indene resin, a phenolic resin
shellac, dewaxed shellac, and gum dammar.
' We have. found that materials which are sult- 25
able plasticizers are chlorinated diphenyl, tri
phenyl phosphate, tricresyl phosphate and di
butyl phthalate. Such plasticizers are ?exible
and control the drying rate.‘
we find such solvents as toluol and naphtha 30
to‘be suitable for purposes of this invention.
We ?nd that the addition of linoleate of lead
controls the drying rate,
the addition of -
waxes and stearates controls the tendency of the
compound in ?lms to stick to one another, par- 35
ticularly where it is necessary to roll the ,com
posite foil film, after having been produced'in‘
the interim, before it is utilized vin commerce.
Our invention consists of the combination of
a tough body means and adherent means, and a
?exible ‘means, such as a polymerizer, together
with a suitable solvent.
The result is a non-hy
groscopic metal and glass adherent ?lm that
can be used for they production of strong metal 45
foil products, labels, cigarette packages and other
forms of containers. _
2.4 grams-of- vinyl acetate, 6 grams of phenolic ‘
resin, 2.5 grams of chlorinated diphenyl and 18
cc. of toluol, when appliedat 105 degrees C. for 50
three minutes to metal foil, provide a strong,
tough product having a water-white brilliancy
and sparkle. The product is strongly adherent
the moisture and ?avor in the tobacco of the \ to metal and cannot be detached therefrom at
The metal foil runs in thickness from .0001 to
room temperatures, and the metal can be at- :55v
2 .
tached to glass by the application of heat and’ what we claim as new and desire to secure by v
slight pressure.
There are a variety of other combinations than
indicated but we have found the foregoing to be
a satisfactory one-in practice.
The package is provided with a sealed end as
indicated in. the several ?gures of the drawing
and it will be noted that this backing for the tin
foil, when the folding has taken place at the end
10 of the package, will form a tight seal due to its
metal adherent qualities when slightly heated.
This is indicated at the sealing surfaces marked
3 and 4.
Referring to Figures 3, 4 and 5, this backing
15 film is left without any foil facing as at 5.
the backing film is substantially transparent and
is tough, strong and durable and has a smooth
surface, this provides a window through which
the cigarettes can be viewed, while at either end
20 there is the metal foil ca-p Suitably sealed. The
ends are (sealed 'with the combined metal and
backing reinforcement while the intermediate
side walls are transparent. This backing mate‘
rial is light and ?exible so that the total weight
25 of the package is materially reduced from that of
the customary package now known in the art.
One of the outstanding features of this pack
age is that the synthetic resin compound is non
hygroscopic. There is, nothing to absorb mois
ture as in the case of cellulose or natural resin.
It is disastrous to a cigarette packagevto associate
Letters Patent, is:
1. 'A new article of manufacture for use as
a moistureproof package consisting of a non
hygroscopic transparent, ?exible ?lm adherent to
metal under ‘the application of heat, having un
covered areas and areas covered by metal foil
integrated therewith whereby a package can be
formed having transparent portions and metal
foil covered portions.
2. A new article of manufacture comprising a
relatively‘ strong non-hygroscopic transparent.
film that becomes adhesive under heat and that
is metal adherent, and end coatings of metallic
foil integrated therewith whereby a window is 16
left between the metallic foil ends for the ob
servation of the contents of the package andv
whereby upon folding, the ends of the ?lm may
be thermoplastically united with itself and ad
jacent areas of foil to form a moistureproof end
seal for the package.
. ‘
.3. A moistureproof package comprising an in;
ner transparent wrapper of thermoplastic non
hygroscoplc metal adherent synthetic resin hav
ing integrally secured to the outside thereof
structurally weak metal foil extending to the
ends of' the inner wrapper, the ends of said pack
age being folded and sealed by thermoplastically
uniting areas of said inner wrapper with ad
jacent areas of said metal foil.
4. A moistureproof package comprising an in
with it moisture-absorbing materials. That is _ ner transparent wrapper of thermoplastic non
the reason for the use of tin foil and that is the hygroscopic metal adherent synthetic resin hav
disadvantage of, the paper backing of tin foil.
35 The further disadvantage is that with the present ing integrally secured to the outside thereof areas
of structurally weak metal foil'separated to pro
day package there is no means of sealing the vide a window and extending substantially to the
package against the entrance of moisture or end of the inner wrapper, the ends of said pack
against the loss of moisture from the tobacco.
Y age being folded and sealed by thermoplastically
It will be understood that we desire to com
uniting areas of said inner wrapper with adja
40 prehend within our invention such modi?cations cent areas of said metal foil.__
as may be necessary to adapt it to varying con
ditions and uses.
‘ Having thus fully described,‘ our invention,
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