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Патент USA US2132635

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. Oct. 11,’1'938.
_2,132,535
' N. LoUFT
METHOD oF scmiEN PRooEss PRINTING
loriginal Filed Juiy 2o, 1935
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Patented oct. 11, 193s
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2,132,635.
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PATENT OFFICE
. UNITED STATES
2,132,635
METHOD 0F SCREEN PROCESS PRINTING
Nathan Louft, Silver Spring, Md. .
Original application July 20, 1935, Serial No.
736,270. Patent No. 2,052,933, dated September
1, 1936. Divided and this application June 26,
1936, Serial No. 87,574
e claims. (c1. 41-3s.5)
Figure 3 shows the transparent paper sten
This is a division of application filed July 20,~
1935, Serial #736,270 which has issued as Patent cilled out around the outline of the sign lettering.
Figure 4 shows the stencilled out transparent
No, 2,052,933, Sept. 1, 1936.
'
paper attached to the underside of a screen.
This invention relates to the art of sign mak
‘
Figure 5 shows the finished sign.
5
Figure 6 is a similar View of Figure 5 but show
ing a two .color sign consisting of the letters
NRA and the outside border of contrasting colors.
Figure 7 is a perspective View showing the
10
method of applying the paint to the screen.
Figure 8 is a sectional View of the stencil paper.
Referring to the drawing in detail, the first
5 -ing and more particularly to a method of yscreen
process printing.
.
.
'
'I‘he main object of the present invention is to
provide a method of making stencils for pro
ducing signs of one or more colors uniformly,
10 accurately, quickly and at a low cost. _
-
Another object of the invention is to generally
improve and simplify the present method of pro
ducing signs, to provide a means whereby a pic
step in the process consists of drawing the sign
ture, design or lettering containing one or more
15 colors may be delineated or reproduced on a semi
smooth or rough surface, such as paper, card
I in outline, which is shown here as comprising
the letters NRA on a sheet of stiff backing 2 of
permanently marked out as the successive colors
the side 4 with. wax and on the opposite side 5
with a coat of glue and then with another coat
of parafñne. As noted in Figure 3 the side which
is coated with wax is in contact with‘the back
any suitable material. The next step is to tem
board and the like, by forcing the color through j porarily paste a -sheet of transparent paper 3
a stencil, portions of which are temporarily or over the backing 2. The said sheet is coated on
20 are applied.
I .
With the above and other objects in view, which
will appear as the description proceeds, the irl
vention resides in the combination and arrange
ment of parts and in the details of construction
25 hereinafter described and claimed, it being un
derstood that within the scope of what is claimed,
changes in the precise embodiment of the in
vention shown can be made without departing
from the spirit of the invention.
30
‘
'
The method of making signs according to this
invention, in brief, `consists of drawing the sign
on a sheet of cardboard or the like, temporarily
pasting a transparent sheet of paper over said
. sheet of cardboard, cutting out in outline with a
35 sharp tool the portions of the transparent paper
which overlay the sign and forming a stencil,
transferring the stencilled out transparent paper
to the underside of a screen and then using the
screen to make the signs by placing the screen
40 over the sign backing and forcing the paint
through said screen, through the openings of the
stencil onto said sign backing and forming the
sign.
In this drawing is shown one form of stencil
45 apparatus'illustrating the invention together with
the method of using the device in the production
of the signs but it'will be understood that this
embodiment ofthe invention has been selected
vfor the purpose of illustration only and that the
50 stencil sheet may take various forms.
In the accompanying drawing:
,
Figure 1 is a view of the sign in outline drawn
on a sheet of cardboard.
.
Figure 2 shows the sign covered with/a sheet
of transparent paper. -
'
ing 2. The transparent _sheet can easily be at
tached to _the backing by goin'g over the sheet
25
with a warm flat iron or the use of pressure.
v
The following step in the process is to cut out
with a sharp instrument the letters NRA in out
line from the transparent sheet and removing
the cut out portions, care of course being .taken
not to cut deeply in the backing. The trans
parent sheet will thus become a stencil. The pur
pose of covering the glued coating of the paper
3` with another coating of parañine is to prevent
the paper from sticking to the fingers. The par
aiiine acts as a sort of insulator and prevents the
glue from adhering to the fingers when cutting
the stencil.
'
The next step is to place the stiff backing with
the stencilled sheet 3 attached underneath Va
screen 6 and transferring the sheet from the 40
backing to the said screen. 'I'his is done by wet
ting the screen and going over it with a rela
tively hot iiat iron. As stated abo’ve the upper
side 5 of the sheet' is coated with glue and par-_ , f
affine and it is this side which comes in contact 45
with the screen. Thel heat from the flat iron
will melt the wax coating which holds the said
sheet to the backing, and at the same time the
glue and the paraii'ine on the paper face of the
sheet will melt together. forming an adhesive 504
compound and cause the sheet to adhere to the
underside of the screen so that when the `screen
is lifted from the backing the stencilled sheet
will be transferred in its entirety to the screen
and in the same relation it -was when attached 55
2
2,182,635
to the backing. 'I'he screen ordinarily comprises
a rectangular frame 'l over which is stretched a
of glue and a coat of parailine so that the waxed
side will come in contact with said sign, heating
said transparent paper so that the waxed portion
sheet of fine mesh fabric, preferably silk, as
shown at 8.
The last step in the process consists of placing
the screen with the stencilled sheet underneath
will adhere to said sign, cutting the outline of -
color a stencil of the border is made in the same
way as the original sign and same process prac
making a stencil thereof, placing said stencil in
said sign in said transparent paper and making a
stencil thereof, placing said stencil in contact
over the sign backing 9 on which will appear the ' with a damp screen with the parafllned surface
ñnished sign, pouring the paint l0 over the screen in contact thereof, heating the screen and sten
as shown in Figure 7 and with a squeegee Il
'10 forcing the paint through the openings I2 in cil so that the stencil will release itself from the
sign and stick to the screen, placing the screen 10
the stencilled sheet 3 through the mesh of the with the stencil attached thereto on a backing
screen onto the backing 9. It is obvious that and painting over said screen so that the paint
where the stencilled sheet is solid the paint will will pass through said screen, through the cut
not come in contact with the sign backing but out portions of said stencil and onto said second
15 only through the openings I2 of the stencilled mentioned backing.
15
sheet. The result is that the finished sign com
l 4. In a method of making signs, the steps which
prising the letters NRA will appear in solid color consist in covering a sign with a transparent
in outline exactly as the original letters NRA` paper coated on one side with glue and the other
appearing on the backing-2 shown in Figure 1.
side -with wax, pressing said transparent paper
20
If it is desired to make a two colored sign as so that it will adhere to said sign, cutting the‘out 20
for instance by adding a border I3 of another line of said sign in said transparent paper and
ticed.
.
It will thus be seen that I have provided a
method of producing signs in large or small quan
tities of one or more colors uniformly, accurately,
quickly and at a low cost.
The screen can be
used over and over again by simply soaking the
30 screen in water and peeling off the old stencil
and attaching a new one.
Having described my invention, I claim:
.
1. A method of reproducing designs, such as
signs, pictures, etc., by placing a transparent film,coated on one side with wax and the other side
with glue over the design that is to be reproduced,
aflìxing wax side of the film to the design and
cutting away selected portions of the design
through the film, then by placing a damp or
moistened screen over the ñlm and the design
and applying heat over said screen to cause glue
side of said film to adhere to said screen and
at the same time causing the 'fllm’to release from\
said design, then by placing said 'screen over a
suitable material on which the design is to be
reproduced and forcing paint through said screen
for reproduction.
2. In a method of reproducing signs or the like
by placing a transparenter translucent paper,
coated on one side with wax over the sign and
the other side of the paper coated with glue,
heating and smoothing out said paper with a
warm iron on the sign and causing wax to hold
the paper and the sign together, cutting selected
55 portion of said sign through the paper, then plac
ing a damp or moistened screen over said paper
and said sign and heating and pressing with a
hot iron, causing glue to adhere to the damp
contactwith a screen, wetting the screen and
stencil so that the stencilv will stick to the screen
and heating the screen and stencil so it will re 25
lease itself from the sign and placing the screen
with the stencil attached thereto. on a backing
and painting over said screen so that the paint
will pass through said screen, through the cut
out portions of said stencil and onto said backing. 30
5. In a. method of reproducing signs the steps
which consist of covering a sign -with a trans
parent paper coated on both sides with an adhe
sive, wax onv one side-glue on the other side,
using pressure to adhere transparent paper to a
sign, cutting away the outline of said sign in
transparent paper and making a stencil thereof,
placing said stencil in contact with a screen,
moistening said screen which will cause stencil
paper> to adhere to screen, pressing with hot iron
said screen and said stencil to release stencil
paper from sign, placing the screen with the sten
cil attached thereto on a backing and painting
over said screen- so that the paint will pass
through said screen. through the cut-out portions
of said stancil and onto saidbacking. s
6. A method of reproducing signs, the steps
which consist in laying out in outline the sign
on a backing, covering the sign with a trans
parent paper, said paper coated on one side with 50
glue and other side with wax, adhering wax side
to said sign and said backing, cutting away the
outline of said sign in said transparent paper
making a stencil thereof, placing said stencil in
contact with screen which‘has been moistened _
with water, pressing with hot iron and causing
firm- adhesion of stencil paper to screen, and at
the same time liquefying wax holding stencil to
screen, and causing the wax to melt between said ^- backing and causing release thereby of said sten
paper and said sign and causing said paper to _ cil to said backing, placing said screen and sten
release from the sign and forming a stencil, which cil over another backing and painting over said 60
is placed over the article on which reproduction screen so that the paint will pass through said
is to be made and forcing paint through stencil. screen, through the cut-out portions of said sten
3. In a method of making‘signs,- covering a , cil and onto said last mentioned backing.
sign with a transparent paper coated on _one
65
side with wax and on the other side with a coat
NATHAN LOUFI‘. `
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