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Патент USA US2116571

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May IÜ,
Filed M_ay l5, 19156H
_ i
\ Viz@
Patented May l0, 1938
»i f normen
Irving Gurwiclr, Mount Vernon, Unio, assigner
to Shellmar Products Company, Mount ‘ii/’er
non, Ohio, a corporation oi Delaware
Application May l5, 1936, Serial No. ‘79,858
3 Claims. (Cl. 93-35)
The present invention relates to containers of a web I 0 is taken from a roll of transparent cellu
the bag type and has particular reference to an lose sheeting I I and thereafter passed through an
improvement in bags and other containers con ' intaglio printing unit. This unit includes an
structed of transparent cellulose sheeting and upper impression roll I2 and a lower edge printing
cylinder I3 constructed in the usual 'mannen 5
'en folded into container form with creases or angu
The lower part of the printing cylinder I3 ro
lar edge portions.
tates in a body I4 of the material which it is de
A principal object of the invention is the pro
vision of reinforcing means for the creases or edge sired to_deposit upon the web as a reinforcing
material. The body of material It is carried in
portions of transparent cellulose sheeting. .
An additional object is to provide a bag or a bath I5 and the excess material picked up by 10
similar container which has deposited along the the roll I3 is scraped therefrom by means of a
angular edges thereof a reinforcing material doctor blade I6. Cylinder it is an intaglio copper
surfaced cylinder having circular etched portions
composed of a ñexible non-fibrous cellulose prod
ll and I8 for applying a substantially continuous
uct or the like._
A further object is to provide a method of line of the material in the bath I5, it being under- 15
forming containers having creases or angular stood that the doctor blade I6 scrapes the mate
' edge portions which will not break or shatter as rial from the cylinder i3 except along the etched
portions I -I and I8.
readily as has been the case heretofore.
» As a result of passing between the cylinders I2
These and other objects will be evident upon
a consideration of the following description of a and I3 the web has deposited thereon longitudi- 20
preferred embodiment of the invention and by nally extending stripes I9 and 29 of the material
reference to the accompanying drawing, inwhich contained in bath I5.l
The material in bath I5 is of the nature of a
Fig. 1 is a perspective view, somewhat diagram
lacquer ink and includes a. heavy bodied nitrocel
matic; of a device for applying an integral rein
forcing material to a web of transparent cellulose lulose such as “600 second” nitrocellulose. The 25
nitrocellulose is carried in a suitable quick-drying
Fig. 2 is a plan view of a satchel bottom bag organic solvent which permits the lines of nitro
formed from the web shown in Fig. l, the bag cellulose to be applied and dried quickly before
the web is formed into tube lengths. It is char
being shown in collapsed condition; and
acterlstic of nitrocellulose of this type that when 30
so deposited it firmly adheres to the regenerated
3-»3 of Fig. 2.
In the production of bags and similar types of cellulose or cellulose acetate sheeting of which
containers from transparent cellulose sheeting, the web I0 is composed and forms a. relatively
thick body portion of a tough nature which resists
such as regenerated cellulose and cellulose ace
tate, it is customary to fold a web of transparent shattering of the container along the vulnerable 35
cellulose sheeting into tubular form, to sever bag t portions covered by the stripes.
After depositing the heavy bodied nitrocellulose
>lengths from the tube, and to fold one end of the
tube lengths into closed condition to complete the stripes, the web is formed into a tube with the
bag. In such condition the bag is collapsed and stripes I9 and 20 overlapping the edge portions
40 the side edges consist of a layer of the transparent in the manner shown in Fig. 3. That is, the 40
cellulose sheeting folded over upon itself and- stripes I9 and 20 form a reinforcement for these
creased edges that are most likely to be damaged
somewhat creased. 'I‘he bottom of the bag like
the use of the bag.
wise consists of several folded-over portions hav
The _bag is provided with a Satchel bottom as
ing creases or angular portions. When containers
formed of these materials are used, it has been shown in Fig. 2, the portions of the bottom hav- 45
found that breakage of the containers is most apt ing the stripes I9 and 20 therealong being folded
to occur along these angular or sharp edges or so that the stripes I9 and 2D meet as substan
In accordance with the present invention, the
web of transparent cellulose material from which
the containers are formed is provided 4with one or
more longitudinal strips consisting of a deposit
of a ñexible material of a suñciently tough na
ture to reinforce the containers and to reduce the
tendency toward breakage. As shown in Fig. 1,
- tially shown in the drawing.
In this way the
'corners 2| and 22, which are the weakest part
of the bottom, are afforded a flexible protection 50
by the stripes I9 and 20, thereby materially in
creasing the strength of the bag.
As indicated in Fig. 3, the stripes I9 and 20
are printed on the outside surface of the web, but
it will be understood that the stripes likewise may 55
p 2
be printed on the inside of the web.
e inven
tion is applicable to other forms oi’ containers
than the speciñc bag shown in the drawing. In
general, it will be possible to apply the invern`-v
tion to any particular form of container or wrap
ping material by the printing method of the in
vention. Also, due to the method of application
of the stripes i@ and 2@ it is possible to apply
stripes other than longitudinal stripes to further
10 protect the material. Thus, a transverse stripe
may be applied and a. fold laid along such stripes.
In some cases it will be found desirable to print
Vwider stripes than shown in the drawing. This
facilitates the vertical operation; since it is easier
15 to locate the fold along a wider stripe than along
a narrow stripe.
The material deposited is a
heavy bodied nitrocellulose which produces a sub
stantially thicker ñlm per unit of material than
in the case of lacquer inks employed in intaglio
20 printing of designs.
If'desired, the material may
be colored to present the appearance of colored
stripes on the finished bag or container. Due
to the ñexibility of the printed stripes and the
rbody of the material the fold lines of the trans
parent cellulose sheeting are substantially pro
tected thereby. The nitrocellulose stripes are
diüerent in their characteristics from the regen
erated cellulose and cellulose acetate with which
it is desired to employ the material and the com
loination of the two types oi' the materials in the
manner described materially reduces the shatter
ing tendencies of the containers with which the
heavy nitrocellulose is employed. 'I'he improved
container is produced at a cost, which is only
35 slightly in excess of the normal cost of the con
tainer and the printed stripes not only are pro
tective but are attractive as well, particularly
when colored.
Ordinarily, the transparent cellulose web from
which the containers are constructed will be sub-»
Jected to a printing operation and wound into the
roll form indicated at ii prior to the operation
described hereinabove. That is, the web is sub‘î
jected to an ordinary printing operation, wound
into roll form, unwound, longitudinal lines of the
heavy bodied nitrocellulose are applied to the un
wound web, and the web then is folded into con
tainer form along the lines of the heavy bodied
nitrocellulose. Thus, the protective lines of the
heavy bodied nitrocellulose are applied just prior
to folding the web into bag form.
It will be recognized that the invention as de?
scribed herein is susceptible to . modification
Without departing from the scope of the ap
pended claims.
I claim:
1. The method of producing containers of
transparent cellulose sheeting, which comprises
applying longitudinal lines of a quick-drying solu 20
tion of a heavy bodied nitrocellulose to a travel
ing web of transparent cellulose sheeting, and
folding said web into container form along said
2. The process of making containers, which 25
comprises applying a line of S00 second nitro
cellulose contained in- a solvent to a web of trans
parent cellulose sheeting, and folding said web into
container form along said line.
3. The process of producing containers of trans
parent non-ñbrous sheeting, which comprises ap
plying to said sheeting a line of an adherent soin-_
tion of .a relatively heavy bodied cellulose com
pound contained in a relatively quick-drying
solvent, drying said solvent, and folding said sheet 35
ing along the line of application‘of said cellulose
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