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Патент USA US2135150

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‘NOV; 1, 1938-_
' H. P. SCHMIDT
, I
2,135,150
PRINTING mass cymmma
Original Filed Aug. 14, 17934
2 Sheets-Sheet 1 ‘
INVENTOR
8% P
ATl'O-RNEY
‘ _
* Nov- 1, 1933-
‘
H. P. scams-r
_
PRINTING
PRESS
2,135,150
CYLINDER
I
‘Original Filed Aug. 14, i934
_ 2 Shoots-811601‘. '2
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ATTORNEY
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.‘PetemediNJv. 1,1938! : .
STATES’ PATENT ‘OFFICE .
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7, 2.135.150.
‘We rnnss
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r.‘ Schmidt, New York, N. Y., asaignor to ‘
H. H. Heinrich, Inc., New York, N. 1., a cor-v
poratlon New York
Application August 14, 1934, ‘Serial No. 139,745
_
Renewed March as. 193':
6
(Cl. Mil-415.1)
This invention relates to improvements in 'face.and va
' ‘
‘blank space
respect to the‘
printing press cylinders vand'rneans for mounting
printing plates thereon. In particular my inven
tion relates to that type of.v printing cylinder
5 which employs rubber or other‘ resilient sur;
vention to provide a printing press cylinder‘hav
ing a printing plate removably mounted thereon
faces and which is used in the process commonly
ina-manner that will present the equivalent .of
known as rubber'plate printing. Such cylinders
an unbroken printing surface.
are particularly adapted for use in rubber plate
printing presses using quick drying aniline inks,
10 this combination providing high speed produc
tion with the minimum ‘of make ready time and
without requiring the services of a highly skilled
pressman as in other forms of printing presses.
In rubber plate printing presses a web of paper is
is passed between an impression cylinder and the
cylinder carrying the rubber [or other resilient
printing surface in order to impress the printing
surface upon the paper.‘ It is a desideratum that
' the surface of the rubber plate be continuous in
printing
results.
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It is therefore’the principal object of my in
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It is another object of my‘ invention to provide
a printing press cylinder having a rubber or other
resiliently surfaced printing plate removably 10
mounted thereon in a manner that will present
the equivalent of an unbroken printing surface.
Another object of my invention is to provide
novel means of attaching a rubber printing plate
_to' a segmental cylinder.
Another object of my invention is to provide
novel means of drawing together segments of a
divided‘ cylinder.
1
v
'IAnotherobiect of my invention is to provide
20 order that the printing therefrom be unbroken; . ' ’ new and novel‘means for securing a segmental
Maintaining a continuous and unbroken sur
faced rubber plate has heretofore been accom
cylinder'to its supporting and operatingshaft.
plished by having continuous and unbroken ‘sur
will readily appear as the nature of the inven- -
with these and other objects in I' view which ‘
faced cylinders with the rubber or resilient sur- . tion is better‘ understood, the same consists in
face processed directly on to the cylinder surface.
It is obvious however that in such cylinders that
for each change of design a separate cylinder is
the improved construction and novel arrange
ment and combination of parts which .will be.
hereinafter fully described and fully'pointe‘d out
required or that the design then on the cylinder -‘ . in the appended claims.
In the accompanying drawings has been illus
be destroyed when replacing it with another. '_
7
My invention further relates to the provision of
segmental cylinders with' means for tightly
stretching a metallic printing plate around the
circumference thereof when the segments are
' drawn together and in such manner as to pre
sent a substantially continuous and unbroken
printing surface.
limitation is necessarily made to the precise, -
structural details therein shown, but that
changes, alterations and modifications within the
scope of the appended claims may be resorted to
when desired.
It has heretofore been proposed to furnish a
segmental cylinder with means for tightly
' stretching a metallic printing plate around 'the
40
trated a‘ simple and preferrediform of the.in
vention, it being understood however that no
circumference of the cylinder when the segments
are drawn together. Such devices are shown in
United States Patents Nos. 1,730,122, 1,795,700,
1,795,702 and 1,860,765. These devices disclosed
in the prior art do-not, however, provide an un
broken printing surface such as that provided.
in ‘printing press cylinders where the design’is
processed directly on or into the surface of a
cylinder having a continuous and unbrokensur
‘face, in that the metallic printing plate in its
.
In the‘ drawingsi
’
8.5
.
a _
Fig. 1 is a cylinder completely assembled and
mounted on its supporting shaft, and having a
rubber or other resiliently surfaced plate re
movably mounted thereon;
Fig.2 shows one of the halves of the cylinder
illustrated in‘Fig. 1, the shaft upon which the
completely assembledcylinder is placed, the re
lationship of the rubber or‘ other resiliently ‘45
surfaced printing plate to the cylinder, and a
sectional view of‘ the retaining collars;
of the outer meeting edges of the cylinder seg
Fig. _3 is a sectional view taken through A-A
of Fig. 1 looking in the direction of the arrows; 60
Fig. 4 is an end view of a completely-assembled
ments, or the construction is otherwise such that
cylinder as shown in Fig. l, and
entirety is bent inwardly over ‘rounded corners
the plate surface is not continuous.
In such
-
~
Fig. ‘5 is an end view of two halves of the cyl
construction an inactive space of appreciable
55 width is disposed longitudinally of the plate sur- ' ' Referring to the drawings in. detail, wherein 55
inder
alone.
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"
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2,185,150’
similar reference characters ‘designate corre
spending parts throughout the several views:
I is the two halves of a hollow cylinder, each
having end walls 2.. The end walls 2 of each
cylinder half are provided with slightly less than
half of a bore 3 suitable for clamping engagement
with shaft 4 on which the two cylinder halves I
are to be mounted. The printing plate 5 which
in‘ one form thereof is shown as having a rubber
10 or other resilient printing surface consists of a
base 8 composed preferably of ?ne mesh screen
wire to which a rubber surface is vulcanized, al
though a thin sheet of metal or fabric such as
heavy canvas or other suitable material may be
'15 used for base 8. In some cases it may bevdesired
to use a thin all metal plate, with or without base
6, instead of the resiliently surfaced plate shown. _
ing line. It will-also be obvious' that I can pro
vide like means to those shown for engaging ends
of a plate at I8 where spacer I1 is now provided
and thus mount individual plates on each of
cylinder halves I.
It will be obvious to those skilled in the art that
I have provided a printing press cylinder having
a printing plate, which in one embodiment may
have a rubberv or other resilient printing surface,
‘removably mounted thereon in a manner that will 10
present the equivalent of an unbroken printing
surface, and thatI have provided new and novel
means for attaching such a printing plate to a.
divided cylinder, ‘with an indistinguishable meet
.‘ ing line at the abutting edges thereof, and that I
have provided novel means for drawing the
halves ‘of a divided cylinder together, and for
securing the divided cylinder to its supporting
The plate 5 is most conveniently attached to the
cylinder halves I when they are removed from ~_;and operating shaft.
20 the shaft 4. The abutting ends ‘I of the rubber
Having thus _ described my invention and 20
portion of the plate 5 are placed to extend slightly. pointed out the features‘ which are new, what I
beyond the edges 8 of the cylinder halves I, to claim is:
I ‘
compensate for the thickness of the base 8, and , - 1. A' printing cylinder composed of two halves
the ends 8 of the base 6 are turned inwardly of
25 the edges 8 of the cylinder halves I where they
are secured by compression between bars Ill and
the surfaces II of cylinder halves I by screws I2.
It is- to be. noted that edges 8 of the cylinder
halves I are quite sharp, being preferably just
30 short of a cutting edge and that due to sloping
the cylinder walls as at 8', clearance is provided
of a cylinder, means mounted in each of the’cyl
inder halves for clamping an'end of a printing
plate, and means for forcing the cylinder halves
together, said last named means consisting of
collars mounted on reduced end portions of said
cylinder halves and screw means in said collars
engaging extended portions of the printing plate
- between the turned in portions of base .8 except
2. A printing cylinder comprising two semi
at edges 8. The sharp edges 8 of the cylinder
halves I are also important when it is desired to
35 use a thin all metal printing plate since the meet
ing line, formed when the edges of such a plate
cylindrical parts having opposed parallel periph
are bent over and held as shown, is practically
indistinguishable. The cylinder .halves I are
then placed upon the shaft 4 and a spacer plate
40 ll of approximately the same thickness as the
two turned-in ends of base 6 is inserted between
the edges I8 of the cylinder halves I. The cylin
der halves I are then closed together su?lciently
.to permit collars I3 to be slid over the reduced end
I4 or the cylinder halves I. The bars
45 portions
III extend outwardly of the cylinder halves I and '
project into the cut-out portions I5 of the collars
I3. Through one wall of the cut-out portions I5
of the collars I3 projects screws I8 which engage
60 the outwardly extending ends of one of the bars
III. The outwardly extending ends of the other
bar I0 engage the opposite walls of the cut-out
portions I5 of the collars I3 to those through
which the screws I6 project. ‘Turning the screws‘
55 I8 forces one of the bars I8 toward the other bar
30
clamping means.
eral edges and cut away portions beveled in
wardly therefrom providing clearance progres
sively increasing away from said edges and to
35
ward the axis of rotation of the cylinder, a print
ing plate backing disposed around the cylinder -
and having opposite ends extending therein
through the clearance aforesaid and compressed 40
between the opposed parallelperipheral edges
of the cylinder parts, means for securing the
ends of said backing in the cylinder, a printing
plate secured to the backing around the cylin
der and having opposed edges meeting and sup
ported by the portions of the backing compressed
between said opposed peripheral edges of said
cylinder parts, and means for forcing the cylin
der parts together to effect the compression of
‘the portions of the printing plate backing as
aforesaid.
_
3. In a printing cylinder, a plurality of cylinder
segments having opposed parallel peripheral’ edges
and cut away portions beveled inwardly there
from providing clearance progressively increas
I0 thus closing the cylinder halves I together and
compressing the turned-in portions of the base 6
and the abutting ends ‘I of the plate 5 together.
ing away from said edges and toward the axis of
rotation of the cylinder, a resiliently surfaced
In collars I3 are mounted set screws I8 which are
said printing plate having a basemember- the
ends of which are turned inwardly of said cylin 60
60 then turned to engage the reduced end portions
ll of cylinder halves I and bind the bore 3 to the
shaft 4 and to prevent displacement of the col
printing plate extending around said cylinder,
.der and through said clearance and compressed
between the’ opposed parallel peripheral edges
lars I3. By‘having the printing plate 5 slightly, of the segments thereof, the ends of the resilient
shorter in dimension than the circumference of portion of said printing plate being abutted to
the cylinder it isv tightly stretched around the gether under compression and supported by the
cylinder when thecylinder halves I are forced compressed portions of said base member to form
together as described. It will be obvious that an unbroken continuously supported printing
screws I6 can be used to compress the turned-in
portion 9 of the base 6 and the abutting portions
70 ‘I of the plate.5 to any extent necessary in order
to form the equivalent of a continuous unbroken
printing surface. In event of any irregularity in
the meeting of abutting portions 1 of plate 5,
'75
trimming or pressing of the edges may be resorted
to in order to provide an' indistinguishable meet
surface.
4. In a printing cylinder, 8. cylinder'compris
ing a plurality of cylinder segments assembled
together and having opposed parallel walls pro
viding for meeting only at the periphery of the.
cylinder, a resiliently surfaced printing plate
having a ?exible base member extending around
said cylinder, said base member having end por
15.
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g,
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7
8,185,150
tions compressed at the periphery of said cylinder
to form a continuous surface, and the meeting
edges of the resilient‘portion of said printing
plate being compressed together to form a con
" tinuous printing surface, the compressed end por-~
tions of said base member providing rigid contin
uous support for the meeting edges of said re
silient portion of said printing plate.
5. In a printing cylinder, the combination of a'
10 printing plate having a surface of resilient mate
rial and a base member, disposed around a cylin
der composed of a plurality of segments, means
for. mounting said segments‘ upon'a shaft ‘to
form the cylinder comprising protruding shoul
15
tial walls thereof, said cut away beveled por
tions beginning at the periphery of said cylinder
and extending inwardly therefrom and provid
ing for peripheral meeting of said cylinder
halves, a resiliently surfaced printing plate ex 6
tending therearound, said printing plate having
[a base member the opposite ends of which are
turned inwardly of and secured inside the cylin
der halves and portions of which are compressed
between the peripheral meeting edges of solid 10
cylinder halves and the resilient surface of said
printing plate having abutting edges meeting un'. . >
der compression and overlying the compressed
portions of said ‘base member, and collars
ders on the cylinder segments extending longi . mounted upon reduced end portions of said cylin
tudinally along the shaft, collars adapted to ride der halves, said collars having means for forc
on said shoulders, screw means on said collars ~ ing together said cylinder halves to tightly draw
for pressing against ‘ longitudinally extending
, strip-like members, a pair of said members, said
,,
3
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said base member around said cylinder, halves,
compress ‘portions of the base member between
screws in said collars being adapted to draw the‘ the peripheral meeting vedges of said cylinder 20
backing of said printing‘ plate tightly about said halves, and compress together the ‘abutting ends
' segments and to compress the meeting ends of of the resilient portion of said printing plate
. the resilient material so .as to form a' continuous overlying the compressed portionsof said base
and uniform printing circumferenee'about the member, said compressed portions of said base
member providing rigid support for the abutting -25
'6. In, a printing cylinder, the combination of ends of the resilient portion of said printing plate
two cylinder halves assembled together to form so that a, circumferentially continuous design is
a cylinder, said cylinder halves having opposed printed therefrom.
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segments.
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cut away beveled‘ portions in the circumferen
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HARRY P. SCHMIDT.
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