Improvements in Printing Machines.
Year: 1898

page_text: Date of Application, 8th Aug., 1898-Accepted, 8th Oct., 1898
COMPLETE SPECIFICATION
Improvements in Printing Machines.
.
I, WILLIAM HENRY REYNELL TOYE, of 616, Sansom Street, in the City and
County of Philadelphia, in the State of Pennsylvania, United States of America,
Printer, do hereby declare the nature of this invention, and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement: -
My invention relates to printing machines, and particularly to those machines,
such as color presses in which a single sheet of paper is subjected to several
impressions and in which consequently it is necessary that the registry of the
paper with each couple should be as nearly the same as possible. In machines of
this class flexible carriers to which the paper nippers are attached have been
advantageously used, but some difficulty has been met with in securing by their
use an absolutely correct and uniform registry of the nipper bar with the recesses
in the carrier rolls, generally the ends of the impression cylinders, formed to
receive the blocks by which the nipper bars are secured to the flexible carriers, and
the object of my invention is to provide means for temporarily locking these
blocks in the recesses of the rolls or cylinders, such means being preferably of
a character which also forcibly and positively seat the blocks in the recesses,
thus insuring that the blocks shall always be forced and held to their proper
position with reference to the printing couple acting upon the paper held by
the nippers attached to such blocks. While the give of the chains or other
flexible connections used will generally be sufficient to enable the blocks
themselves I prefer to provide means for a certain definite yielding of the chains
between adjacent nipper bars, preferably making a yielding connection between
the chains and the nipper bar blocks, thus insuring a capacity of the blocks to
adjust themselves to their recesses or scats under sufficient force.
seat
Reference being now had to the drawings in which my invention is illustrated,
Figure 1 is a side elevation of a press provided with my improvement.
Figure 2 is a plan view of a portion of an impression cylinder showing a
nipper bar and attachments seated therein and held to place by my device.
Figure 3 is an end elevation of a portion of the impression cylinder showing
my device.
'
Figure 4 is an enlarged view showing a nipper bar block, and my preferred
device for attaching the chains thereto.
Figure 5 is a side elevation of an impression cylinder showing a modified device
for holding the blocks in their recesses.
Figure 6 is an end view of the same modification, and
Figures 7 and 8 are end views of other cylinders showing still other modifica-
tions of my invention.
A is the frame of the press, A' being standards upon which the impression
cylinders are supported, and A2 A² etc. (Fig. 1) arms of the frame supp ting
guide rolls and other portions of the machine. B is a reciprocating bed upon
which type forms B₁ B₁ etc., are secured. CC etc. are inking rolls. D is a table

page_text: from which sheets are fed to the nippers. E E are impression rolls the ends of
which serve as carrier drums or rolls for the flexible carriers and have formed
in them recesses E' in size and form adapted to make a neat fit with the nipper bar
blocks when the nipper bars are in correct registry. FF etc., are guide_rolls
for the flexible carriers G upon which are secured the nipper bar block H etc.
the portion Hof which fits nicely as aforesaid in the recesses E. Preferably
I form recesses H2 H2 in the blocks H in which are blocks I I to which the chain
sections are secured and which are held against the pull of the chains by
springs J J. K (Fig. 4) indicates the nipper bar extending between two blocks H
as does also the shaft L to which is secured the nippers M M etc., said nippers
being normally held against bar K by springs L' but opened when desired by the
action of cams or stops striking against lever arms N attached to shafts L.
Aside from the elastic connections between the blocks H and chains G the
machine, as hereinabove described, is of familiar construction and is therefore
only indicated in outline.
In the device, as shown in Figs. 1, 2 and 3, I pivot on studs O bell crank
levers the arms (1 being hooked at their ends so as to pass as shown over
portions and of the shaft L and draw the blocks H into the recesses E¹. The
other arm of the levers are arranged at proper times to come in contact with
cams P which force the levers into operation and through them seat and hold
the blocks in proper position, springs Q effecting a retraction of the levers when
they are released by the cams.
In Figs. 5 and 6 I have shown latches consisting of levers pivoted at R and
having arms R¹ which, when forced in, engage and hold projections h of blocks H
and arms R² arranged to be acted on by cams Pl, springs Q1 serving to release
the latch levers. This device serves to hold the nipper bar blocks in position but
is dependent on other constructive details or devices to seat the blocks in their
recesses E
In Figs.
and 8 I provide the blocks H with cam rolls S S on their backs
arranged to act in connection with cams P3 or P2 which force and hold the blocks
in the recesses E¹ during the critical period. The cam 13 is indicated as being
formed of an elastic spring while cam P is solid and unyielding.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. In a printing machine, the combination with the printing couples of a
flexible carrier, as G G, having nipper bar blocks, as H, secured to it, recesses,
as E, formed in the rolls over which the carriers pass, said recesses being
adapted to receive and form a nice fit with the blocks H, and means, as specified,
arranged to hold the blocks in the said recesses to secure a correct registry of the
paper with the printing couples.
2. In a printing machine, the combination with the printing couples of a
flexible carrier, as G G, having nipper bar blocks, as H, secured to it, recesses,
as E, formed in the rolls over which the carriers pass, said recesses being
adapted to receive and form a nice fit with the blocks H, and means, as specified,
arranged to seat and hold the blocks in the said recesses to secure a correct
registry of the paper with the printing couples.
3. In a printing machine, the combination with the printing couples of a
flexible carrier, as G G, having nipper bar blocks, as H, secured to it by elastic
connections, recesses, as E¹, formed in the rolls over which the carriers pass, said
recesses being adapted to receive and form a nice fit with the blocks H, and
means, as specified, arranged to hold the blocks in the said recesses to secure a
correct registry of the paper with the printing couples.
4. In a printing machine, the combination with the printing couples of a
flexible carrier, as G G, having nipper bar blocks, as H, secured to it by elastic
connections, recesses, as E¹, formed in the rolls over which the carriers pass, said

page_text: recesses being adapted to receive and form a nice fit with the blocks H, and
means, as specified, arranged to seat and hold the blocks in the said recesses to
secure a correct registry of the paper with the printing couples.
5. In a printing machine, the combination with the printing couples of a
flexible carrier, as G G, having nipper bar blocks, as H, secured to it and made
elastic between adjacent blocks, recesses, as 1, formed in the rolls over which
the carriers pass, said recesses being adapted to receive and form a nice fit with
the blocks H, and means, as specified, arranged to hold the blocks in the said
recesses to secure a correct registry of the paper with the printing couples.
Dated this 8th day of August 1898.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.