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Патент USA US2108115

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2,18,115
Patented Feb. 15, 1938
UNITED STATES PATENT OFFIQE
2,108,115
HAND DUPLICATOR
Levi Foss, Wilmot, S. Dak.
Application August 13, 1936, Serial No. 95,888
5 Claims. (Cl. 101—125)
This invention relates to hand duplicators of
the character of those employing a. rocking frame
carrying an inking blanket constituting a backing
for a stencil sheet and the object of the inven
5 tion is to provide an extremely simple, economical
and easily handled article of this sort.
In the accompanying drawing, in which like
characters of reference designate corresponding
parts throughout the several views:
Figure 1 is‘ a side elevation of a duplicator
10
constructed in accordance with the invention;
Fig. 2 is a longitudinal sectional view there
through; and
Fig. 3 is an end elevation thereof.
15
The duplicator of the present invention com
prises a pair of transversely disposed end blocks
5 of wood. A piece of sheet metal is bent to
form the opposed side walls 6 and a longitudinally
curved bottom ‘I. This bottom is provided with
a multiplicity of perforations 8 through which
ink applied to a limited extent to the interior
of the device may ?nd its way to a blanket 9
which covers the bottom ‘I and is in turn covered
by the stencil sheet Ill, cut in the usual fashion
upon a typewriter, or otherwise, to provide any
desired message or design. When the article is
rocked back and forth over a sheet of paper or
other surface, the typewriting or other design
will be reproduced upon such surface. The sheet
30 metal bottom ‘I does not extend as far out at its
ends, as the side walls ‘6 but, as is illustrated in
Fig. 2, only partially overlaps the bottoms of the
blocks 5 so there is an exposed part of the wood
of the blocks into which tacks H may be driven
for the purpose of holding the blanket drawn
taut over the perforate bottom 1. Thus the
blanket is ?rmly held in place in this simple and
inexpensive way during the time that one stencil
sheet is being removed and another is being ap
plied. The stencil sheets are held in place by
bars 12; grooves l3 being provided in the block 5
for the reception of said bars, the placing of
the bars in the grooves, binding the ends of the
‘ stencil sheet beneath them and drawing the
stencil sheet taut.
Swinging keepers l4, pivotally mounted upon
bolts l5, overlie the bars when the latter are in
place and these keepers in turn are pressed
forcibly on the bars by the tightening of thumb
50
nuts 15, upon the bolts I5. The bars are further
held in place by being made of such length as to
fit relatively snuglybetween the side walls 6 and
these side walls aid in preventing the bars from
55 falling out of place during the time the keepers
Ill are being adjusted and the thumb nuts iii are
being tightened.
I» am aware of the fact that it has heretofore
been proposed to employ duplicators having arou
ate under faces to adapt them to be rocked in the
act of reproducing the matter out upon the
stencil. However, there is no article with which
I am familiar that'is constructed so simply and
economically as the one herein described. It
should be noted that the outer faces of the blocks
5 are disposed at an upwardly and inclined angle
so that the article may be easily grasped and
efficiently guided by placing the thumb against
one of its sides, the fore?nger against the front
face of one of the blocks and the remaining
?ngers of the hand against the other side wall.
When thus held, the grip. is so firm that the
duplicator may be applied ?rmly and accurately
and in such fashion that no blurring or smearing
of the design will result.
While the construction shown is well adapted h
for the purposes set forth, it is to be understood
that the invention includes within its perview
such changes as come within the spirit of the
appended claims.
is El
Having described my invention, what I claim is:
1. A duplicator of the character described com
prising a sheet of metal shaped to form a lon
gitudinally arcuate perforate bottom and side
walls, a pair of wooden blocks constituting end 30
walls which lie between and are secured to the
side walls and the bottoms of which blocks are
only partially covered by the metallic bottom, a
blanket stretched over said metallic bottom and
fastened to the uncovered portions of said blocks,
a stencil sheet overlying said blanket, and means
upon the end walls for engaging said stencil
sheet, said means comprising rods having a seat
ing in transverse grooves formed in the outer
faces of said blocks, and means for forcing said
rods toward and into said grooves and for holding
them in place with respect to said grooves.
2. A structure as recited in claim 1 wherein
the means for securing the stencil sheet com
prises rods having a seating in transverse grooves
formed in the outer face of said blocks, bolts
traversing said blocks, swinging keepers mounted
upon said bolts adapted to be swung to and
from overlying positions with respect to said rods,
and members threaded upon the bolts adapted to 50
tighten said keepers after they have been swung
to engaging position over said rods.
3. A device of the character described com
prising a sheet of metal shaped to form a per
forate and longitudinally arcuate bottom and 55
2
2,108,115
vertical imperforate side walls, a pair of wooden
blocks seated between said bottom and side walls,
one at least of said blocks having an upwardly
and rearwardly inclined front face, a blanket
stretched over the perforate bottom and secured
to said blocks, a stencil sheet over said blanket,
the ends of which are disposed in transverse
grooves formed in the lower portions of the front
i‘aces of the said blocks, rods seated in said grooves
10 and holding the ends of the stencil, said rods lying
between and being held against endwise move
ment by the presence of the side walls, bolts trav
ersing said blocks, and swinging keepers mounted
upon said bolts and adapted to be swung into
15 retaining position over said rods.
éi. A device of the character described com
prising a sheet of metal shaped to form a per
forate and longitudinally arcuate bottom and ver
tical imperforate side walls, a pair of wooden
blocks seated between said bottom and side walls,
one at least of said blocks having an upwardly
and rearwardly inclined front face, a blanket
stretched over the perforate bottom and secured
to said blocks, a stencil sheet over said blanket,
the ends of which are disposed in transverse
grooves formed in the lower portions of the front
faces of the said blocks, rods seated in said
grooves and holding the ends of the stencil, said
rods lying between and being held against end
wise movement by the presence of the side walls,
bolts traversing said blocks, swinging keepers
mounted upon said bolts and adapted to be swung
into retaining position over said rods, and thumb
nuts threaded upon said bolts and adapted to
force said keepers against said rods.
5. A device of the character describe-d com
prising a rocking frame having side and end
walls, a perforate bottom, a blanket and a stencil
sheet, means for holding said stencil sheet com
prising a rod having a seating in a groove formed
in one of the end walls, a bolt traversing the end
wall, a keeper swingingly mounted upon said
bolt and adapted to be swung into engaging posi
tion over said rod, and a thumb nut upon the
bolt adapted to force the keeper toward the rod.
LEVI FOSS.
l)
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