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Патент USA US2411881

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Dec. 3, 1946.-
E J, JA‘NKE
,
¿411,881
CLAMP FOR MASTER SHEETS OEPR’INTING MAcH1NEs~
Fila Nome; 1944
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D¢¢.3,1946.
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2,411,881
CLAMP FOR MASTER SHEETS OF PRINTING MACHINES
Filed Nov. 8, 1944
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Patented Dec. 3, 1_946
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' 2,411,881
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UNITED STATE s- PATENT AOFFICE f ¿
v2,411,881»
CLAMP rolav MASTER SHEETS or »
PRINTING MACHINES
' Edward J'.~ Janke, Cleveland, Ghio, assignor to
~ Ad'dressograph-Multigraphy Corporation, Cleve
land, Ollio,y a corporation of Delaware
Application November 8, 1944, Serial No. 562,440
(Cl. 10i-415.1)
12 Claims.
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1
2
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Y
the drum surface I5, such surfaces being joined in
The general object of this invention is to pro
this region by a fiat surface I6 which makes an
oblique angle to a tangent to the drum surface at
vide a veryV simple and at the same time very
effective clamping means for holding the ends of
the point of departure and preferably makes a
right angle with the anvil surface I2. At the
a master sheet on a printing drum. l
Another object of the invention is to provide
such clamping meansas will enable the mounting
of the’plate and the Vdemounting thereof within a
other end of this anvil surface the gap in the
drum provides a surface >Il preferably at right
angles to the surface i12.
minimum of time. » - Still another object is to pro
f
Secured to the _surface l1, which is approxi- '
vide a simple clamp which may hold plates hav
mately radial of the drum, is one v»leaf 20 of a '
10
ing perforations along one end into which pro
continuous hinge. The other leaf 2l of this hinge
jections of the clamp may extend and to hold
is adapted to lie parallel with and bear against
with equal facility plates which are impervious.
the surface I2, While the free edge of the leaf may
My clamping means vis adapted kfor holding
stand close to the surface I6 of'the gap. The two
plates of various materials but is especially well
members 2B and 2lA are connected by a con
adapted for clamping comparatively thin paper
plates', and has its> maximum usefulness with
plates which are frequently changed, due to its
capacity for quick operation.l
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tinuous hinge rod 22.
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The continuous hinge described is of the gen
eral type commonly known as a piano hinge.
"
'Howeven as I use it the ears of both leaves are
To the above ends,` Ilhave provided two clamps
curled in the same direction instead of being
mounted vwithin ¿the gap of theV drum for the
rights and lefts as is the 4usual hinge arrange
master sheet,r one vclampY operating vto engage the
ment.~ vThe purpose of this will be hereinafter
leading-'end ofthe plate andthe other the trail
explained.
,
Y
ing end. The leading end clamp, with which this
Each of the hinge'leaves extends the full length
invention is concerned,y anchors that> end of the
of thedrum. The leaf 2!! >is shown as >secured
plate tightly in‘position, While the trailing end
byscrews 24~passed inseveral regions through it
clamp is adapted not only to hold the plate-but
into the drum, holding it tight against. the sur
to apply tension thereto, to retain it taut about
face l1. The leaf` 2| is stiñened by a longitudi
the drum. For the trailing end, I prefer to use
bar 25 extending theflength of the drum, and
a.’` clamp of the character described andclaimed in s" >nal
rigidly fastened to the leaf, preferably by coun
Patent No. 2,165,283 of F. E. Curtis, issued July
te'rsunk rivets 26.
11,. 1939, to my assignee, Addressograph-Multi
' Thehinge leaf 2Í is shown as extending beyond ~
graph Corporation.
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The leading end clamp of this invention is best
understood from description hereinafter given .of
a preferred embodiment thereof illustrated in the
drawings.
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In the drawings, Fig. 1 is a plan of a master
sheet drum having myinvention of clamp for the
leading. end and also'a clamp» for the trailing end;
Figi 2**is an end elevationf`ofsuch drum showing
the'twoì clamps; Fig-1` 3`isj an end view on a larger
' scal‘efof» the leading end clamp and adjacent por
tiorfsßof-'t-‘he' drum, the clainpbeing shown in'open ,
positionîy receiving the rnasterfsheei‘,- and" ready to`
clamp the same; Fig. 4f is a cross section through
the.)- leading end clamp i-n an intermediate loca
each ¿end of the drum. .At one end thereis
mounted on it an operating lever 30 shown as
, secured to it by rivets` 3i. This operating lever
extends to each side of the pivot provided by the
pintle 22. At its outer end it isa preferably bent
inwardly as shown at 32. To this inwardly bent
end is secured a tension spring 35, the other end
of which is anchored to a pin 36 carried by the
end plate i8 of the drum. There is also indicated
in Fig. 1 a spring 31 anchored to the projecting
endl of the hinge leafk 2| at the other end ofthe
drum,`the inner end of the spring beingA suitably
anchored ¿to the drum.
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.
The effect` of the springs shown is to maintain
the leaf 2i normally down in the rabbet space
tion parallel to Fig. k3, as indicated for instance by
provided'by the surfaces l2 and I6 of the drum.
the line 4`---4 on Fig. 1.
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When it is desiredv to mount the leading end of
ï 'The drum 1:0 is provided with a gap Il Ofcom
paratively 'small -depth and' small arcuate '- extent. 50 a plate in such space a finger pressure on the
inwardly projectingv end ofthe lever Si! may tip
Within this gap are two ledges` |12 and I3' which
„constitute'or carry‘the anvils for the leading end ï the hinge leaf 2l back away from the ,anvil into
some such position as shown in'Fig. 3 and then
¿clamp and the trailing endiclamp respectively.
thev plate, indicate-dat A in thatç'iigure, may be
'I‘he anvil Vledge ‘I2 forl the leading end clamp is 55f , readily'inserted
in thev direction of the arrow X.
p'?ëferablya planeß inset from ’thev vperiphery of
y
2,411,881
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When the finger pressure on the lever, indicated
by the pressure-arrow Y, is released the springs
swing the hinge leaf into the position shown in
Fig. 4. This acts to bend the master sheet
abruptly at a, Fig. 4, from the curved surface for
more than a. right angle into position along the
face of the drum surface IB and to again bend the
plate at a.' bythe amount of a right angle into
the drum. Tension springs 44 are attached at
their outer ends to pins 45 on the end members
and anchored at their inner ends to pins carried
by the drum, preferably the same pins 36 which
anchor the springs of the leading end clamp.
The diagonal direction of the springs 44, and
the movement allowed by the slots 42, give the
longitudinal bar 40 of the trailing end clamp a
tendency to bear against the ledge I3 and to
position along the face of the anvil surface l2.
These bends cause the plate to be very effectively 10 move inwardly along such ledge. The ledge I3
clamped even though the surfaces engaging it are
is provided with periodic recesses or pockets I9
smooth and the tension springs light enough so
and the bar 40 of this clamp has inwardly pro
that pressure of the operator’s ñnger on the lever
jecting prongs 48 which register with these re
30 may readily release the clamp.
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cesses. These prongs -are spaced in correspond
By mounting the hinge leaves 2B and 2l so that 15 ence withv the openings of the perforated plate
the ears of both extend from the leaf in the
same direction (that is both toward Vthe right
of the leaf, as shown) instead of employing the
usual right-and-left hand connection, I cause the
which is adapted for use in this machine, so
that when such perforated plate is bent around
the drum with its end overhanging the ledge I3
the prongs will extend through the openings
and thus ñrmly hold the plate on the anvil ledge
hinge axis toilie entirely beyond the anvil I2 but
close thereto -and nearly in the plane of the anvil,
and also supply a tension thereto.
and I leave a succession of aligned ears alterna
is secured. This results in a smooth curved sur
»
In the case of an imperforate paper plate these
` prongs, which come to sharp points, operate to
tively of the two hinge leaves beyond the anvil but
tangent to the surface Il to which the fixed leaf
perforate the plate, and pass through it in the
25 same manner as if it were originally perforated
face leading upwardly from the end of the anvil
in this region. The plate thus is held at the trail
and forming a definite stop for the inserted master
ing end by the spring pressure of the clamping
sheet irrespective of the angle of opening of the
bar 40 holding the plate on the ledgeA and by the
clamp. The master A may accordingly be in
prongs passing through the plate, resulting in
serted quickly to the limit of its movement, where 30 the springs 44 maintaining effective tension on
its end abuts the continuous hinge with the as
the plate.
surance that it is in proper place and that its
In securing the trailing end, the clamping bar
edges (which are at right angles to the end) will
Il@ is manually lifted away from the ledge I3 by a
lie parallel with the ends of the drum.
suitable ñnger grip. As shown, I have provided
The inwardly turned end 32 of the clamping 35 for thisy purpose a backwardly bent portion of
lever 3D overhangs the end of the drum surface
the plate 49, furnishing a ñnger ledge, as indi
as indicated in Fig. 4, and stands close to it so
cated at 49 in the drawings.
that it forms a ready side guide for the position
It will be seen ‘that-whether a platealready
ing of the master sheet.
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perforated is used, or an imperforate plate
Finally, as the clamp is readily opened by finger 40 adapted to be kinked by the leading end clamp, it
pressure of the operator’s right hand on the lever
may be mounted at each end in the minimum
of time and will thereafter remain in position
on the drum under proper tension lduring the
printing operation. At the end of the operation
Sli he'may very readily and quickly place the
master sheet in the position indicated in Fig. 3
by his left hand, and then by releasing the lever
eífectively clamp the sheet. I-Ie may then by turn
ing the drum cause the sheet to lie along its sur
face with its other end in position to he engaged
and held by the trailing end clamp.
As master sheets are sometimes provided with
the plate is removed with equal facility. The
tipping back of the trailing end clamp’by the
finger ledge '4S releases the plate at that'end,
and then, after the drum is given half or three
quarters of a rotation, the leading end clamp
a row of perforations or perforated ears -on their
is in position for ready release. If a thin paper
plate is used it is not necessary even to. operate
the leading end clamp manually, as the plate’may
be readily pulled out of that clamp by a jerk in a
direction away from the drum. In the case of a
ends intended for hooking over projections in
mounting the sheet, I provide a row of hook
ingprojections 22 on the bar 25 over which such
perforated master sheet may Ice-hooked.' As the
springs normally maintain the clamp closed such
hooks are available and readily accessible within
the periphery of the drum as indicated in Figs.
‘Z and 4, so that such sheet'may be hooked onto
the projections and then the drum rotated yto
;. metal plate, having perforated ears mounted on
bring» the trailing end clamp into position for
engaging the other end of the sheet.
lI‘he trailing end clamp, as shown, is adapted
for operation equally well on a thin paper plate
originally imperforate (indicated at Ain each
figure) or on a plate normally provided with open
ings or perforated ears on its ends (indicated at
B in Fig. l)-as for instance a metal plate shown
and claimed in Patent No. 1,957,221v of Allen @t
Hartley, issued July 24, 1934, and now assigned
to Addressograph-Multigraph Corporation.
As shown, the trailing end. clamp comprises a
yoke having a longitudinal bar portion di) extend
ing over the ledge I3 and a pair of end arm por
tions flI provided with slots llâwhich are mounted
on pins ¿i3 projecting from Athe -end members of 75
hooks 28, it may be readily unhooked from such
anchorage without paying attention to the clamp.
I claim:
1. The combination of a drum having a gap and
a ledge within the gap, a hinge having one leaf
secured to the drum andthe other leaf adapted
to lie parallel with the ledge or be tipped atan
angle thereto, and'means adapted to maintain
the latter leaf in contact with amaster sheet
between such leaf and ledge.
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2. The combination of a drum having a gap
and a ledge within the gap offset inwardly from
a corner formed by the gap and the periphery of
the drum, a hinge having one leaf vsecured to the
drum and the other leaf adapted to~ lie parallel
with the ledge or be tipped at an angle thereto,
and a spring adapted to press the latter leaf _to
ward the ledge and clamp a master sheet be
tween
3. The
such
combination
leaf and ledge.
with a
_ drum
Y
' »having
,_
- a gap,
:2,411,831l
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a ledge within the gap and a surface extending
inwardly from the kfree edge of the ledge, a hinge
‘ having one leaf secured to said inwardly extend
ing surface and the other leaf adapted to lie par
allel with said ledge and coact therewith, means
for maintaining such coaction, and means for-tip-_
ping the clamping leaf outwardly on its hinge
pivot to allow the insertion of a sheet between it
6
the periphery of the drum' when the clamp is'
openthereby provide an edge guide for the sheet
being inserted.
8. The combination of a drum having a gap,
a ledge within the gap, a hinge having one leaf
secured to the drum, the other leaf being adapted
to coact with the ledge to clamp a sheet between
them, a lever secured to such other leaf and ex
tending in each direction from the pivot thereof,
and the ledge.
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a portion of the lever extending inwardly from
4. The combination of a drum havînga gap, v10 the pivot being adapted to form a manual oper
a ledge within the gap, the drum having a sur
ating device for tipping the leaf, a portion ex
face connecting the inner` edge of the ledge with
tending outwardly from the pivot being bent in
the periphery of the drum and making abrupt
wardly at its free end beyond the leaf to provide
angles with such periphery and with the ledge,
an edge guide for a master sheet being inserted
15
« the drum having also a surface extending in
between
the free leaf and ledge, and a tension
wardly from the free edge of the ledge, a hinge
spring anchored to the drum at its inner end and
having one leaf secured to the latter surface and
connected at its outer end with the free leaf.
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_ the other leaf adapted to stand parallel with the
.9. The combination of a drum having a gap, a
ledge and coact therewith, and a spring acting on
ledge within the gap, a piano hinge having its
the latter leaf tending to maintain it seated on a 20 leaves extending longitudinally of the drum, one
master sheet bent inwardly over the edge of the
of said leaves being secured to the drum, the
gap and then in a reverse direction between the - other leaf being free and adapted to clamp a
ledge and free leaf.
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' sheet between itself and the ledge, the ears of
5. The combination of a drum having a gap
said piano hinge forming a stop for a sheet in
and a ledge within the gap, and also having a 25
surface extending from the free edge of the
ledge, a hinge having one leaf secured to the lat
ter surface and the other leaf adapted to stand
parallel with the ledge and coact therewith, a
spring acting on the latter leaf tending to main
tain it seated on a master sheet between the
serted into the space between the ledge and the
' free leaf when tipped back therefrom.
l0. The combination of a drum having a gap,
a ledge within the gap, a- piano hinge having its
leaves extending longitudinally of the drum, one
of said leaves being secured to the drum, the
other leaf being freeand adapted to clamp a
ledge and free leaf, and a lever connected to the » '
sheet between itself and the ledge, a spring acting
free leaf and adapted to tip it to enable insertion
on the free leaf tending to maintain it in' coac
yof the master sheet in the space between the
tion with the ledge, and a lever connected to the
35
leaf and ledge.
> » ,
free leaf and extending beyond the pivot of the
6. The combination of a drum having a gap,
hinge and 4adapted to tip the free leaf away from
a ledge within the gap', a hinge having one leaf
the ledge,
secured to the drum, the other leaf being
1l. The combination of a drum having a gap
adapted to coact with‘the ledge to clamp a sheet
and a ledge within the gap, a hinge having one
40
between them, a lever secured-,to such other leaf
leaf secured to the drum, the other leaf yadapted
and extending beyond the pivotal axis thereof to
to coact with the ledge to clamp a sheet between
form a manual operating' device adaptedr by in
them, and -outward projections carried by the
ward movement to tip the leaf outwardly, and a
n free leaf and adapted to project through open
spring tending to seat the free leaf against the le. El
ledge.
7. The combination of a drum having a gap, a
ledge within the gap offset inwardly from the
periphery of the drum toleave an abrupt shoul
der where the periphery joins the gap and an
other abrupt shoulder where the offsetting sur- l
face joins the ledge, a hinge having. one leaf se
ings in a master sheet.
.
12. The combination of a drum having a gap
and a ledge within the gap, a hinge having one
leaf secured to the drum, the other leaf adapted
to coact with the ledge to clamp a sheet between
50 them, and a bar secured to such free leaf and
having projecting hooked teeth adapted to pro
ject >through openings in a master sheet ex
cured to the drum and the other leaf adapted to
tending outside oí the bar.
coact with the ledge toA clamp a sheet between
them, means secured to such free leaf and ex
EDWARD J. JANKE.
tending beyond the leaf in a direction to overlap 55
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