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Патент USA US2409831

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Oct. 22, 1946;
A. BRAUNWORTH
2,409,830
‘PRINTING PLATE CLAMPlNG MECHANISM
Filed ,Feb._ 16, 1943 '
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Oct. 22, 1946.
A. BRAUNWORTH
2,409,830
PRINTING PLATE CLAMPING ‘MECHANISM
Filed Feb. 16, 194:5
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PRINTING PLATE CLAMPING MECHANISM
Filed Feb, 16, 1943
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A. BRAUNWORTH
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PRINTING PLATE CLAMPING-MECHANISM
Filed Feb. 16, 1945
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Patented Oct. 22, 1946
2,499,830
UNITED ' STATES PATENT OFFICE
2,409,830
.
PRINTING PLATE CLAMPING'MECHANISM
Albert Braunworth, Queens V,_illa.ge,,N‘. Y.,,,assign
or to R. Hoe & 00., Inc., New York,
poration of New York
17., a cor
Application February 16, 1943, Serial No. 476,109
3 Claims.
1
. This invention relates to printing plate clamps,
and more particularly to clamps of the type em
ployed to secure a plurality of rigid plates on
the plate cylinder of a rotary printing machine.
, In printing practice, where stereotype or simi
lar plates are. employed, the plates are clamped
on the plate cylinders of a rotary printing press
by means of clips which overhang the bevel edges
of the plates andby which the plates are clamped
against a suitable abutment, so that they are
rigidly ‘held in position during the printing op
((31. 101—378)
2
neously actuated for plate clamping and plate
releasing movement by a single radially-disposed
operating.instrumentality or tool from locations
inside of, the cylinder bearers.
A speci?c object of this invention is to provide
an improved plate clamping mechanism for
clamping relatively rigid printing plates on a
printing cylinder having bearers at each end
thereof, and whichmechanism includes a plu
rality of plate clipsadapted to engage an edge
of a printing plate, each clip being movable ‘in a
eration. In printing certain products, the print
recess in the cylinder by a screw threaded clip
ing is usually effected on printing machines in
rod, a gearsecured toeach clip rod, a rotatable
which the plate cylinders are eapacitated to carry
member meshing with each gear to simultane
a number of plates widthwise or. in the direction 15 ously rotate the gears and clip rods upon rotation
of the axis of the cylinder. Theinner plates are
of the rotatable member, and means for rotating
clamped between the conventional center ring
the rotatable member by a radially-disposed tool
and the longitudinally slidable inner clips, and
from a. location inside of the cylinder bearers to
the outer plates are clamped between the inner
thereby simultaneously rotate the clip rods to
clips and the conventional end clips.
20 move the plate clips to and from clamping en
Each plate cylinder cooperates with an impres
gagement with the plate.
sion cylinder to provide a printing couple, and
A more “speci?c object of this invention is to
each cylinder of the couple is provided with con
provide an improved plate clamping mechanism
ventional bearer rings at its terminals, and these
for clamping relatively rigid printing plates 1on a
bearers or rings operatein rolling contact in order > printingcylinder having» bearers at each end
tomaintain the printing components of the plate
thereof, and ‘which mechanism includes a plural
and impression cylinders in accurate printing
ity of plate ‘clips adapted to engage an edge of
aprinting plate,- each clip being movable in a re
The .end clips are usually moved to, and from
cess in the cylinder by a screw threaded clip rod,
relationship.
,
i
.
clamping engagement withthe outeredgeof the 130 a ?rst gear secured on each clip rod, an inter
outer plates by rotatable screws or clip rods which
mediate gear‘ meshing with the ?rst gears, a bevel
threadedly engage the clips. These clip rodsare
gear rotatable with the intermediate gear, a bevel
rotated from the end of the plate cylinder by a
pinionmeshing ‘with the bevel gear, and means
suitable tool or wrench, and in order to locate
to rotatably support the clip rods, the intermedi
the Wrench-engaging portion of each clip rod for
ate- and ‘bevel gears, and the bevel pinion inde
pendently of the cylinderbearers.
convenient accessibility, the clip rod extendslon
gitudinally through an aperture formed in the
It is ‘also an object of this invention to provide
bearer at, a location adjacentdts outer or periph
a plate clamp'of generally improved construction
eral surface.
whereby the device will be simple, durable and in
.This arrangement has proven unsatisfactory in so expensive in construction, as‘ wellas convenient,
commercial use, because the heavy impression
practical, serviceable and e?icient in its use.
pressure imposed on the cooperating rollingbear
With the foregoing and other objects in view,
ers sometimes causes them to crack or rupture
which will appear as the description proceeds,
at locations adjacent the apertures through which
the invention resides in the combination and ar
the'elip rods extend.
rangement of parts, and in details of construc
It is, therefore, an object of this invention to
tion hereinafter described and claimed, it being
provide an‘ improved plate clamping mechanism
understood that various changes in form, propor
which is constructed and arranged for plate lock
tion, and minor details of construction may be
ing and plate releasing operation from a location
made within the scope of the claims without'de
inside the bearers of the plate cylinders, and in 50 parting, from the spirit or sacri?cing any advan
which the components are operably supported
tages of the invention.
independently of the bearers.
For a complete ‘disclosure of the invention, a
It is also an object of this invention toprovide
detailed description of it will now be given in
an improved plate clamping mechanism in which
connection with the accompanying drawings
a plurality of clamping components ‘are, simulta 55 ‘forming a part of‘ the speci?cation, wherein:
2,409,830
3
4
Figure 1 is a fragmental plan view depicting a
preferred form of the invention;
Figure 2 is a longitudinal sectional view taken
on the line 2--2 of Figure 1;
Figure 3 is a fragmental end elevation, parts
pinion 23 and its stub shaft 28, and this socket
is radially disposed in order to receive a radially
disposed operating tool or wrench T, indicated
by dotted lines in Figure 5.
Each spur gear 2| is secured to a clip rod 35
(Figure 2) that has a reduced portion formed at
Figure 4 is a fragmental transverse sectional
its outer end which is rotatably received in a bear
ing aperture 36 formed in the'arcuate plate I6.
view taken on the line 4—4 of Figure 1; ‘
Each clip rod 35 is provided with an inwardly
Figure 5‘is a fragmental longitudinal sectional
10 extending threaded portion or screw 31 which
view taken on the line 5-5 of Figure 1;
‘ is threadedly received within a threaded aperture
Figure 6 is a fragmental end elevation depicting
formed in the body portion of an end clip 38.
a modi?ed form of the inventioryparts appear
appearing in section;
.Each end clip '38 is provided with an upstanding
ing in elevation;
Figure 7 is a fragmental'plan view‘ depicting a
further modi?cation of the‘invention;
'
" clip segment 40 having an overhanging dove
tailed lip 4| to engage the outer arcuate bevel
edge of the outermost plate P in each longitudinal
'
Figure 8 is an end elevation, parts appearing
in section; and
or axial row of plates, in conformity with the
,
Figure 9 is a fragmental longitudinal sectional
view taken on the line 9—9 of Figure 7.
Referring to the drawings, in which similar
usual practice. Each clip 38 is mounted for longi
‘ tudinal sliding movement in a groove l2, and it
characters designate corresponding parts, there
is depicted a conventional plate cylinder IQ of a
printing machine arranged to support a plurality
of printing plates P. Longitudinally-extending
recesses II are formed in the peripheral portion
vofithe plate cylinder I3, and longitudinally-ex
tending grooves l2 (Figure 4) extend inwardly
is retained therein by opposed caps or bars 42
(Figures 1 and ii) which are suitably secured to
the cylinder i0 and received within the recesses
i l. The caps 132 are provided with bevel surfaces
#33, which engage bevel surfaces 35 formed at the
outer portion of each plate clip body 38, as best
seen ‘in Figure 4, to thus slidably retain each‘clip
‘body 38 within its groove l2. Inasmuch as the
clip rods 35 are held against longitudinal move
ment, it is manifest that rotation of the clip rods
ceive plate-locking components to be hereinafter 20 35 will cause the plate clips 38 to move longitudi
nally within the groove l2, and the direction of
described.
An annular recess l3 (Figures 2 and 5) is
movement of the clips being determined by the
formed in each end of the plate cylinder I0 and
direction of rotation of the clip rods.
The plates P are circumferentially located on
receives therein an annular bearer l5 of conven
tional construction. Although only one end of
the plate supporting surface of the cylinder ID
the‘ plate cylinder has been depicted in the draw
by‘ the engagement of the lateral or longitudi
nally-extending edge of each plate with a bevel
ings, itis to be understood that both ends of the
cylinder are similarly constructed and arranged.
lip 46 (Figure 6) upstanding from a conventional
margin bar 41. The usual arrangement for as
Arcuate plates l5 are received within the recess
l3 and are secured to the cylinder ID by radially 40 sembling plates on a plate cylinder, which ar
disposed screws ll (Figure 5). Each plate I5
rangement is well understood by those skilled
abuts the inner axial terminal of a bearer l5 and
in the art, is to locate the inner plates, not shown,
forms a support for components to be hereinafter
adjacent the center of the cylinder, and the in
ner edges of the inner plates abut a conven
described.
<
'
-An arcuate circumferentially-extending recess
tional center ring, ‘not shown. The inner edges
I8 is formed in the cylinder [0 adjacent the plate 45 of the outer plates P are engaged by conventional i
[6 for the reception of a train of plate clip actuat
inner plate clips, not shown, which also engage
ing gears; ' This trainincludes two, spaced spur
the outer edges of the inner plates. By this ar
gears 23' which mesh with three smaller spur
rangement, longitudinal inward movement of the
gears 2i, and one of the smaller spur gears is
end plate clips 38 causes the inner and outer
positioned intermediate the spur gears 20, and 50 plates to be securely clamped to the plate cylin
from the recesses l l and communicate therewith,
and these grooves and recesses operatively re
' the remaining two gears 2! are located outside
of-the spur gears 20, as best seen in Figure 3.
Each spur gear 23 has a bevel gear 22 (Figure 5)
der, in conformity with the usual practice.
In operation, when it is desired to secure the
plates to the cylinder, a suitable wrench or tool
secured thereto or formed integral therewith, and
T (Figure 5) is positioned in either of the wrench
this bevel gear meshes with a bevel pinion 23 55 receiving sockets 33 (Figure 1) according to
which is rotatable about a radially-disposed axis
which socket is the more conveniently located,
and which provides a driving member for the
and by simply turning the wrench the engaged
train, as will be more fully explained hereinafter.
bevel pinion 23 (Figure 5) is rotated. The rota
Each composite gear 20—-22 is rotatably sup
tion of this bevel pinion rotates the meshing
portedv on a stub shaft 25 which is rotatably re 60
bevel gear 22 and its spur gear 20, which, in turn,
ceivedrin a bearing aperture 25 formed in an
rotates all of the gears in the train, and, conse
arcuate plate l5, the aperture and shaft being so
quently, rotates the clip rods 35. The rotation of
disposed that the spur gear 25 and bevel gear 22
the clip rods causes the upstanding clip segments
rotate about a longitudinally or axially-disposed
axis. Each . bevel pinion 23 is provided with 65 40 (Figure 2) to engage the outer beveled edge
of the outer plate P, and thereby force the plates
aligned stub shafts 21 and 28, which are rotat
ably, received’ in radially-disposed bearing aper
tures 30 and 3| formed in the cylinder l0 and a
into engagement with their locking clips to thus
securely clamp the plates to the cylinder sur
face.
From the foregoing it is manifest that an ef?- '
32 is secured to the cylinder I0 by screws 34 (Fig 70
cient, convenient and quick-acting plate clamp
ure 1) or other suitable securing devices. By this
ing, mechanism has been provided which is en
arrangement each bevel pinion 23 is rotatable
tirely independent of the bearers l5, conse
abouttan axis which is radially disposed relative
bearing or cover plate 32, respectively. The plate
to theplate cylinder I5.
A rectangular tool-re- .. .
quently' permitting the bearers to, present their
ceiving recess or'socket 33 is formed in each bevel 75 maximum strength to resist the usual heavy imé'
2,409, 830
pression pressure, thereby avoiding frequent
failure of the bearers in commercial use.
A modi?ed form of the invention is depicted in
Figure 6, in which form the components for rotat
ing the clip rods 35 are identical with those here
tofore disclosed, except that only two clip rods
6
clip rod gears and having axially alined inner
and outer stud shafts rotatably received in cylin
drical bearing apertures formed in the printing
cylinder and the bearing plate respectively and
disposed in radial alinement relative to the print
ing cylinder, the outer stud shaft having a tool
receiving socket formed therein at the cylinder
are employed, and these rods are rotated by
spaced gears 25 which are, in turn, actuated from
surface whereby a tool may be inserted into the
a single wrench socket 33 through an operably
socket to rotate the gears and clip rods to thereby
interposed bevel pinion 23, bevel gear 22 and spur 10 move
the clips axially along the clip rods towards
gear 20.
or away from the printing plate.
A further modi?cation of the invention is de
2. In a printing cylinder adapted to support
picted in Figures 7, 8 and 9, and in this form of
relatively rigid printing plates and having an
the invention, two clip rods 35 are provided, and
annular bearer recessed in the cylinder at each
they are rotated by Worm gears 2| a, which are
end thereof, an arcuate plate recessed in the cyl
rigidly secured to the clip rods. The outer ter
inder against the inner side of each bearer, a
minal of each clip rod 35 is rotatably received
bearing plate recessed in the cylinder immediately
within a bearing aperture 360, formed in an
adjacent an arcuate plate, a plurality of movable
arcuate plate I?a. The worm gears Zla mesh
Clips adapted to engage an edge of a printing plate
with a worm 23a which is provided with aligned
stub shafts 21a and 28a, that are rotatably re 20 which is supported on the cylinder, a plurality of
clip rods each threadedly engaging a clip and dis
ceived in radially-disposed bearing apertures 30a
posed in axial relation to the cylinder and rotat
and 3| a formed in the cylinder Illa and a bearing
plate 32a, respectively. By this arrangement the
ably supported in bearing apertures formed in the
arcuate plates, a ?rst spur gear rigidly secured
radially disposed relative to the plate cylinder 25 to each clip rod, a second spur gear meshing with
the ?rst spur gears, a ?rst bevel gear rotatable
I Do, and provides a driving member for the gears
with the second spur gear, a drive bevel gear
2la. A rectangular tool-receiving recess or
meshing with the ?rst bevel gear and having
socket 33a is formed in the stub shaft 28a, and
axially alined inner and outer stud shafts rotat
this recess is radially disposed in order to re
ceive a radially-disposed operating tool or wrench 30 ably received in cylindrical bearing apertures
formed in the printing cylinder and the bearing
T
worm 23a is rotatable about an axis which is
This arrangement provides a relatively simple
construction in which a worm 23a may be oper
ated by a radially-disposed tool at a location
inside‘ the cylinder bearer, and this Worm rotates
plate respectively and disposed in radial aline
ment relative to the printing cylinder, the outer
stub shaft having a tool-receiving socket formed
therein at the cylinder surface whereby a tool
the spaced clip rods 35 through worm gears Zia,
to thus cause the plate clips to move into look
may be inserted in the socket to rotate the gears
and it is therefore desired that the present em
bodiment be considered in all respects as illustra
tive and not restrictive, and it will be further
understood that each and every novel feature
and combination present in or possessed by the
mechanism herein disclosed forms a part of the
end thereof, an arcuate plate recessed in the
cylinder against the inner side of each bearer,
a bearing plate recessed in the cylinder immedi
ately adjacent an arcuate plate, a plurality of
movable clips‘adapted to engage an edge of a
posed in axial relation to the cylinder and rotat
to rotate the Worm, worm gears and clip rods to
and clip rods to thereby move the clips axially
along the clip rods towards and away from the
ing engagement with the outer plates of the plate
printing plate.
cylinder.
40
3. In a printing cylinder adapted to support
It will be understood that the invention may be
relatively rigid printing plates and having an
embodied in other speci?c forms without depart
annular bearer recessed in the cylinder at each
ing from the spirit or essential attributes thereof,
printing plate which is supported on the cylinder,
invention included in this application.
50 a, plurality of clip rods each threadedly engaging a
clip and disposed in axial relation to the cylinder
Having thus described the invention, what is
and rotatably supported in bearing apertures
claimed as new and useful, is:
1. In a printing cylinder adapted to support
formed in the arcuate plates, a worm gear rigidly
relatively rigid printing plates and having an an
secured to each clip rod, a worm meshing with the
nular bearer recessed in the cylinder at each end , worm gears and having axially-alined inner and
thereof, an arcuate plate recessed in the cylinder
outer stub shafts rotatably received in cylindrical
against the inner side of each bearer, a bearing
bearing apertures formed in the printing cylinder
plate recessed in the cylinder immediately adja
and the bearing plate respectively and disposed in
cent an arcuate plate, a plurality of movable clips
radial alinement relative to the printing cylinder,
adapted to engage an edge of a printing plate
the outer stub‘ shaft having a tool-receiving
which is supported on the cylinder, a plurality of
socket formed therein at the cylinder surface
clip rods each threadedly engaging a clip and dis
whereby a tool may be inserted into the socket
ably supported in bearing apertures formed in the
thereby move the clips axially along the clip rods
arcuate plates, a gear rigidly secured to each clip 65 towards and away from the printing plate.
rod, a drive gear operably connected with the said
ALBERT BRAUNWORTH.
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