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Патент USA US3064556

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Nov. 20, 1962
Filed Sept. 29, 1960
2 Sheets-Sheet l
zagfn/ Moray/MS
NOV- 20, 1962
Filed Sept. 29, 1960
2 Sheets-Sheet 2
.47 men/£7
‘United States Patent
Patented Nov. 20, 1962
Chamber 22 of the base is completed by the top glass
cover 24 which in the preferred embodiment is a ground
glass by which the light source is transmitted to the
chamber 26 thereabove.
The base shown in FIGS. 3 and 4 also includes adjacent
the upper end thereof the opal plastic support 25 for the
transmission of diffused light therethrcugh and to further
Loren Hut‘chins,'Detroit, Mich, assignor to The Douthitt
Corporation, Detroit, Mich, a corporation of Michigan
Filed Sept. 29, 1960, Ser. No. 59,239
5 Ciairns. (Cl. 95—73)
de?ne the chamber 26, as a part of said base.
This invention relates to a translucent copyholder pho~
A preferably clear glass table top 27 completes the
tographic printer.
10 said base and overlies the light transmitting support 25
The present invention has for its primary object the
and extends to the respective end Walls 13 of said base and
provision of an enclosed base including a transparent top
provides the working surface for the contact printing op
work surface with opposed pairs of vertically and longi
tudinally spaced rolls journaled adjacent the opposite ends
eration hereafter described, as for a photographing opera
of the said base with one set of rolls being tension rolls 15
A pair of parallel spaced roll supports '28 are sectired
and the other set of rolls being drive rolls and with clear
to and project longitudinally of one end of the base 11,
transparent plastic strips respectively mounted upon the
as shown in FIGS. l and 2 for the purpose of journalling
said tension rolls, overlying the work surface in contact
and supporting a pair of vertically and longitudinally
with each other and at their free ends wound around the
spaced takeup tension rolls 30, as at points 29. Each
respective drive rolls, whereby when the said drive rolls
of the tension rolls includes the conventional torsion
are rotated in unison the respective strips of plastic mate
spring 31, FIG. 2, one end of which is anchored to the
rial may be moved longitudinally over the work surface
roll and the other end of which is adapted for anchoring
for the purpose of transporting a negative and a sensitized
to a portion of the roll support 28, as best shown in
strip in juxtaposition to a central portion of the work
FIG. 2.
surface for a contact printing operation.
For this purpose the ?attened ends 50 which are in the
It is a further object of the present invention to pro
nature of a conventional type of axial ?tting for the tor
vide means for rotating the drive rolls in unison and tor
sion springs project through the adjacent roll support 28‘
sion means in conjunction with the tension rolls whereby
and through the guides or blocks 16 and are retained by
in one direction of rotation of the said drive rolls the
the respective set screws 51, as hereinafter described.
respective sheets of plastic material are unrolled from 30 An elongated strip of transparent or clear plastic mate
the tension rolls and whereas in opposite direction of re
rial, as indicated at 33, is at its one end secured to and
tation of the driving means the plastic material is un
wound around the uppermost tension roll 30. A second
rolled from the drive rolls and automatically rewound on
strip of clear plastic, or otherwise transparent material, as
the tension rolls.
indicated at 32 underlies the ?rst mentioned strip 33 and
These and other objects will be seen from the follow 35 extends below the ?rst mentioned roll 30, and is secured
ing speci?cation and claims in conjunction with the ap
to and wound around the second or lowermost roll 30,
pended drawings in which:
as best shown in FIG. 1.
FIG. 1 is a longitudinal section of the present trans
Suitable transverse guide means are arranged adjacent
lucent copyholder photographic printer.
and beyond the ends of the base 11. In the preferred
40 embodiment, these guide means are in the form of a pair
FIG. 2 is a plan view thereof.
FIG. 3 is a section taken on line 3—3 of FIG. 1.
of elongated rolls 37 which are transversely interposed
FIG. 4 is a section taken on line 4-—4 of FIG. 2 with
between the respective roll supports 28 and the roll sup
the base of the printer fragmentarily shown and broken
ports 34, hereinafter described and are journaled thereon
as at 38 so that the upper surfaces of the said rolls 37
It will be understood that the above drawings illustrate 45 register with substantially the top surface of the glass
merely a preferred embodiment of the invention and
table top 27 spaced outwardly from the respective ends
that other embodiments are contemplated within the scope
of the claims hereafter set forth.
A second pair of parallel spaced roll supports 34 are
Referring to the drawings, the present translucent
secured to and projected from the opposite end of the
copyholder photographic printer includes a hollow base 50 base 11 in longitudinal alignment with respect to roll sup-.
generally indicated at 11 with opaque side walls and end
ports 28, as best shown also in FIG. 2.
There are a
walls 23, 13, bottom wall 15 and including the supporting
legs 12.
pair of drive rolls 36 which are arranged in longitudinally
and vertically spaced relation with respect to each other
As shown in FIGS. 1-3 one end wall has a series of
and respectively journaled at points 35 between the re—
elongated apertures 14 formed therethrough, whereas the 55 spective roll supports 34. The lowermost of the two
opposing end wall has an aperture 17 mounting thereilii‘a
clear plastic strips 32 extend over the work table 27, over
screen 18. An exhaust fan generally indicated at 19 is
the second guide roll 37 and extends angularly down
positioned upon the interior of the compartment 22 of
ward and is joined to, or suitably secured to and wound
the said base for the purpose of establishing circulation
around the lowermost of the two drive rolls 36.
of cooling air therethrough.
The second clear plastic strip 33, which is juxtaposed
A plurality of electrical sockets 20‘ are mounted upon
over the ?rst plastic strip 32 extends also over the I'BSPEC‘.
the bottom wall 15 connected with a source of electrical
tive guides 37, over the table top 27 and is secured to and
energy with a suitable control switch interposed, but not
wound around the uppermost of the two drive rolls 36, as
shown, to receive the illuminating bulbs 21 which are
best illustrated in FIG. 1. Accordingly, each of the roll
momentarily energized in a conventional manner for a 65 supports at the opposite ends of the base 11 have jour
photographic of contact printing operation as hereafter
naled thereon as at 38, the guide rolls 37. Additionally,
Suitable rheostat 48 is mounted upon the exterior of
the base as shown in FIG. 1 for the purpose of regulating
each of the roll supports 28-, 34 have interposed there
between and journaled thereon, the respective pairs of
longitudinally and vertically spaced tension rolls at the
the amount of electrical energy directed to the bulbs 21 70 left end in FIG. 1, and the power rolls, as at the right
and accordingly the brightness thereof may be regulated
as desired.
end of FIG. 1.
It is noted also that the respective tension rolls, as
well as the power rolls are disposed below the guide rolls
37 ‘in order to carry out the present invention.
The lowermost of the power rolls 36 includes the shaft
illustrated in FIG. 4, a strip of photosensitized material,
normally of rectangular shape, and indicated at W, is
juxtaposed over a negative, indicated at N, and the two
39, which extends through one of the roll supports 34
and through a guide disc 49 and carries the hand wheel
40, suitably secured thereto by which the drive roll 36,
i.e., the lowermost of said drive rolls may be rotated in
are projected between the two plastic strips 32—33 at the
one direction or the other as desired.
The handle 43 also has secured thereto a suitable
sprocket gear ~41, which is joined by sprocket chain 42,
to an additional sprocket gear 43 secured to the stud shaft
44, which projects from one side of the roll support 34,
as shown in FIG. 2.
The sprocket (gear 43 has secured thereto upon the
right end of FIG. 4, directly below the uppermost roll 36.
Accordingly, by rotating the crank in a counterclockwise
direction, it is seen that the juxtaposed worksheet and
negative will be projected between the two strips 32—33,
which due to the tension placed thereon will retain the
workstrip therebetween.
Further rotation of the hand wheel 40 unwinding the
two rolls 36 will cause the associated worksheet and
negative to move to a centralized position upon the work
table or glass support 27 due to the tension in the rolls
30. Accordingly, and for a temporary period, the light
rotative shaft 44, an additional sprocket gear best shown
in FIG. 1 at 47, which is in mesh at all times with the
driven sprocket gear 45 secured to the uppermost of the
two drive rolls 36. Accordingly, rotation of the hand
ing means 21 are energized and under the control of
rheostat 38 there is provided an exposure of the said
wheel 40 in one direction will cause simultaneous rotation
Thereafter the hand wheel 40 is rotated in a clockwise
sensitized strip W with respect to the negative.
in opposite directions of the respective power rolls 36, 20 direction to rewind the respective plastic ‘strips 32—33
upon the rolls 36 which causes the work and associated
whereas rotation in the opposite direction of the hand
negative to be transported to the right end and under the
wheel will affect rotation of the said power roll-s simul
uppermost roll 36 from which it is withdrawn for further
taneously in opposite direction.
processing in a conventional manner. Thus there is pro
The idler gear 47 is directly under gear 45 and accord
ingly is not shown in FIG. 2. A suitable set screw 52 25 vided a relatively simple means for snugly holding the
work strip and negative in juxtaposition in tight contact
is employed mounted so as to thread into the block 49
with each other by virtue of the tension applied to the
by which the shaft 39 of one of the power rolls 36 may
respective strips 32—33 and the glass table top 27.
‘It is contemplated as a part of the present invention
operation, as hereinafter explained.
For illustration, in the preferred embodiment of the in 30 that the strips 32—33 are transparent as is the ‘glass top
27, and the support 25 which is ‘of a light diffusing char
vention, the strips of clear plastic material, namely the
be retained against rotation if desired, as in the setting up
strips 32 and 33 are 31 inches in width with the strip
32 being 121/2 feet long and the strip 33 being 111/2 feet
While a contact printing operation is described above,
tor illustration, another and more important use of the
In setting up the machine the strips are juxtaposed 35 present copyholder printer is contemplated, namely photo
graphing operations. For this purpose, one or a series
upon each other and placed upon the table top 27 of
of object strips W may be fed between strips 32 and 33
glass of the machine and the respective ends of the said
and transported so as to overlie table 27. Due to the
strips are fed over the idle or guide rolls 37 and under
constant tension maintained in ‘strips 32, 33, the object
the uppermost tension roll, as well as the uppermost drive
40 W, often curved, is held perfectly flat for the photographic
operation so it won’t curl or buckle while being photo
The respective one ends of the strips 32 and 33 are
graphed. Any suitable camera may be used for this and
suitably secured to the rolls 30, using a suitable tape. The
which overlies the table 27 .
respective other ends of the strips 32-—33 extend around
While being held ?at, light may project through the
the drive rolls 36 with strip 32 extending over the top
and around the lowermost roll 36 and with the strip 33 45 copy W so any markings or corrections on the back of
the copy will show through and be photographed along
extending around the bottom and around the said upper
most roll 36.
By rotating the hand wheel 40 in a clockwise direction,
the plastic sheeting 32 and 33 may be rolled on to the
with what is on the face of the copy.
The light may vary under the copy and at the same
> time we may project light down on the copy. With this
respective drive rolls, at the same time leaving enough 50 method the vdensity of the image on the front of the copy
or the back of the copy, may be ‘strengthened or weakened
of the material for securing to the tension rolls. After
and brought into perfect balance to be photographed.
the strips have been secured to the tension rolls in the
As above outlined, a piece of sensitized material may
manner above described, the drive wheel is locked in any
contact the copy, we may roll it onto the machine, expose
suitable fashion, as for example securing the set screw
52 within the mounting block 49 with respect to the shaft 55 .it with lights in the machine and produce a copy of the
39 retaining the same against rotation.
Thereafter a tension crank is applied to the ?attened
ends or extensions 50 on the said torsion springs 31. The
tension'members 50 are givenr'approximately 18 turns
each for illustration, after which the lock nuts 51 on the
guide blocks 16 are tightened to thus anchor the said
torsion springs 31 and at the same time provide for a
strong spring bias on to the tension rolls 30, to which the
copy. Thus a primary object is achieved, i.e., this copy
is held between two clear sheets of ?exible material to
be photographed or printed.
The spring rolls 30 not only feed the material in and
out of the machine, but also are a major factor in hold
ing the clear sheets 32—33 flat one to the other, so that
the material in between will be ?at.
Having described my invention, reference should now
opposite ends of the torsion springs are ?xedly secured in 65 be had to the following claims.
I claim:
a conventional manner. This provides a means also of
1. In a translucent copyholder photographic printer, a
regulating the amount of tension which is to be applied
hollow base mounting therein a light source, a clear glass
to the respective rolls 30 in order to assure that the plastic
table top on said base, a pair of parallel spaced roll sup
sheeting 32-33 will lay flat on the top glass 27 of the
machine. Also for the further purpose that as the strips‘ 70 ports projecting longitudinally from each end of the base,
transverse guide means between each pair of supports
of plastic material 32—33 are unwound from the drive
at opposite ends of said base adjacent the ends of said
balls 36, the said tension rolls 30 will automatically re
table top, a pair of parallel longitudinally and vertically
wind picking up the respective strips into a roll as in
spaced takeup tension rolls journaled between one pair of
dicated, particularly in FIG. 1.
supports, a second pair of parallel longitudinally and.
. In the operation of the present device, and as best 75
vertically spaced drive rolls journaled between the other
pair of roll supports, said takeup and drive rolls posi
tioned below said guide means, transparent strips of ?ex
ible plastic material wound in tension at their one ends
respectively upon said takeup rolls, said strips super
guide means including idler guide rolls journaled upon
said supports.
4. In the translucent copyholder printer of claim 1,
said tension rolls including torsion springs anchored at
their one ends to .a roll support and vat their respective
posed one on the other and extending over said guide
means and table top» and at their respective other ends
other ends biased to said tension rolls respectively.
Wound around said drive rolls, said strips adapted to re
ceive therebetween and substantially ?atten a worksheet
the means operably engaging said drive rolls including a
5. In the translucent copyholder printer of claim 1,
crank secured to said one drive roll, ‘gear and sprocket
?or transporting same on to said table for a photographic 10 means interconnecting said drive rolls whereby rotation of
or contact printing operation, and means operably en
said crank in one direction unrolls said takeup rolls under
gaging said drive rolls elfecting selective longitudinal
tension, rotation of said crank in the opposite direction
movements of said strips in unison.
unrolling said drive rolls, said takeup rolls automatically
2. In the translucent copyholder printer of claim ‘1, said
rewind-ing under tension.
base including an enclosed ‘chamber with opaque Walls, 15
a bottom and a ground glass top, spaced below said table
References Cited in the ?le of this patent
top, said light source including a series of bulbs and
rheostat means adjustably connecting said bulbs with a
power source.
3. ‘In the translucent copyholder printer of claim 1, said 20 2,428,333
Hassler ______________ __ Sept. 24, 1946
L-essler ______________ __ Sept. 30, 1947
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