Improvements in Printing Machines.
Year: 1897

page_text: [Communicated from abroad by C. BD. COTTRELL & SONS COMPANY, a Corporation
organized under the Laws of the State of New Jersey, and doing business
at Stonington, in the State of Connecticut, and at No. 41, Park Row, New
York, United States of America.]
Improvements in Printing Machines.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, do hereby declare the
nature of this invention to be as follows:-
This invention relates to what is known in flat bed cylinder printing machines
as registering gearing which is used to bring the cylinder and bed to corresponding
speeds in changing the direction of the movement of the bed. The devices.
commonly constituting such gearing consist of a toothed segment on the cylinder
and a corresponding short toothed rack on the bed. The said segment as hereto-
fore commonly constructed has been throughout its whole arc concentric with the
cylinder and the rack on the bed on which it works has been straight. The
segment has been rigidly attached to the cylinder and the rack has generally been
rigidly attached to the bed, but in some cases the rack or a portion of it has been
so attached to the bed as to be capable of a slight longitudinal movement thereon
for the purpose of accomodating itself to the slight differences of speeds that there
may be between the bed and the cylinder at the time of the rack and segment
coming into gear and of thereby avoiding all thumping action which with the
rigidly attached rack and segment as heretofore constructed has been unavoidable
when running at high speeds.
The invention consists in the novel construction and combination of the register-
ing gearing hereinafter described whereby although the segment and the rack are
rigidly attached to the cylinder and the bed respectively, this tendency to thumping
between their respective teeth is obviated or at least very greatly reduced.
A machine constructed according to this invention comprises the usual framing,
a bed running on ways, and a first and second impression cylinder. The bed
may be driven in a well known manner by a mangle wheel and a mangle rack,
the said wheel being on the oscillating section of the mangle shaft and the rack
being connected by hangers with the bed. The cylinders may be driven indepen-
dently of the bed in any suitable manner as for example by such gearing as is
common in flat bed cylinder printing machines and therefore we have not thought
it necessary to describe any gearing for this purpose.

page_text: Each impression cylinder is provided with a registering segment and the bed
with corresponding racks.
The segments may have the greater portion of their length in the form of true
arcs concentric each with the axis of its respective cylinder, but each has its
head, that is to say that terminal portion which comes first into gear with its
respective rack, gradually turned inwards towards the axis of the cylinder and
consequently of gradually shorter radius than the concentric portion and eccentric
to the cylinder. The racks my also be straight for the greater portion of their
length that they may gear with the concentric portions of the segments but have
their outer ends, that is to say that terminal portion of each which comes first
into gear with its respective segment, turned gradually upward so that each may
gear with the eccentric portion of the said segment and that the racks may enter
into gear with those parts of the segment of shortest radius and, owing to the
gradually increasing radius of the segment, may gradually and easily pass into
gear with the concentric portion thereof.
The straight portion of the rack and the corresponding concentric portion of
the segment operate together like those of the ordinary registering gearing that
is to say while they are properly in gear the bed and the operating surface of the
cylinder both have the normal corresponding speed required for printing but the
eccentric portion of the segment having a shorter radius than the concentric
portion, corresponds with a slower movement of the rack and the bed as compared
with that of the cylinder. Now as at the time of the cylinder and bed coming
into gear the bed is inclined to move at a slower speed than the cylinder, the
correspondingly greater movement of the cylinder during a given movement of
the bed is compensated for by the shorter radius of the segment, and the segment
and the ruck come into gear without thumping, and the bed is, by the progres-
Bively increasing radius of the rack, gradually and quietly brought up to the speed
of the cylinder so that by the time the concentric portion of the segment and
straight portion of the rack come into gear the relative movements of the bed
and cylinder have become normal.
The operation of the segment of the cylinder and the rack at the other end
of the bed is precisely the same as that above described except that the movement
of the bed is reversed.
The eccentric curvature of the heads of the segments and the corresponding
curvatures of the eccentric portions of the racks may be varied considerably
without departing from the spirit of our invention but we have found in practice
that the curves of the heads of the segments may be in true arcs of circles described
with a radius much shorter than the radius of the concentric portions of the
segment. The curves of the raised portions of the racks will be so laid out that
said portions may run properly in gear with the portions of the segments which
are eccentric to the cylinder.
In a modification of the invention the concentric portion of the segment and the
straight portion of the rack are toothed, but the eccentric portion of the segment
and the corresponding curved portion of the rack are toothless, the faces of the
said toothless portions being laid out on curves corresponding with the pitch
lines of the teeth of the eccentric portions of the segments and the teeth of the
raised curved portions of the racks so that there is between the said faces a simple
frictional contact by which the cylinder and bed may be brought properly into
register.
This improvement is obviously applicable to flat bed cylinder printing machines
in which only a single impression cylinder is used.
Dated the 20th dow of Nazomban 1907
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
46, Southampton Buildings, in the County of Middlesex, 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: -
This invention relates to what is known in flat bed cylinder printing machines
as registering gearing which is used to bring the cylinder and bed to corresponding
speeds in changing the direction of the movement of the bed. The devices
commonly constituting such gearing consist of a toothed segment on the cylinder
and a corresponding short toothed rack on the bed. The said segment as herelo-
foro commonly constructed has been throughout its whole arc concentric with the
cylinder and the rack on the bed on which it works has been straight. The
segment has been rigidly attached to the cylinder and the rack has generally been
rigidly attached to the bed, but in some cases the rack or a portion of it has been
8o attached to the bed as to be capable of a slight longitudinal movement thereon
for the purpose of accomodating itself to the slight differences of speeds that there
may be between the bed and the cylinder at the time of the rack and segment
coming into gear and of thereby avoiding all thumping action which with the
rigidly attached rack and segment as heretofore constructed has been unavoidable
when running at high speeds.
are
The invention consists in the novel construction and combination of the register-
ing gearing hereinafter described although the segment and the rack
rigidly attached to the cylinder and the bed respectively, this tendency to thumping
between their respective teeth is obviated or at least very greatly reduced.
The invention is illustrated in the accompanying drawings in which
Figure 1 represents a longitudinal sectional elevation of those portions of a
perfecting printing machine which are necessary to the illustration of the inven-
tion, the section being taken just inside one of the side frames and showing the
ends of the two cylinders and their attached segments and the side of the bed
with its attached racks.
Figures 2 and 3 are side views of one of the segments and racks on a larger
scale than Figure 1, showing them in different relative position, and
Figure 4 represents a side view of a segment and rack illustrating a modification
of the invention.
Similar letters of reference designate corresponding parts in all the figures.
In Figure 1, A is the framing of the machine. B the bed running on the ways a.
C Care the first and second impression cylinders. The bed may he and is
represented as driven in a well known manner by a mangle wheel D and a mangle
rack E, the said wheel being on the oscillating section D1, of the mangle shaft
and the rack E being connected by hangers b with the bed. The cylinders may
be driven independently of the bed in any suitable manner as for example by
such gearing as is common in flat bed cylinder printing machines and therefore
we have not thought it necessary to represent any gearing for this purpose.
E designate the registering segment of the first impression cylinder and F¹ f¹
the rack on the bed corresponding therewith; the registering segment of
the second impression cylinder and the rack corresponding therewith.
The segments, in the example shown in Figures 1, 2, 3, have the greater portion
of their length in the form of true arcs E' concentric each with the axis of
its respective cylinder, but each has its head, that is to say that terminal portion e¹

page_text: or which comes first into gear with its respective rack, gradually turned inwards
towards the axis of the cylinder and consequently of gradually shorter radius
than the concentric portion E' or E' and eccentric to the cylinder. The racks F1 f,
Fin the same example ure straight for the greater portion of their length
that they may gear with the concentric portions of the segments but have their
outer ends, that is to say that terminal portion for f of each which comes first
into gear with its respective segment, turned gradually upward so that each may
gear with the eccentric portion et ore of the said segment and that the racks
may enter into gear with those parts of the segment of shortest radius and, owing
to the gradually increasing radius of the segment, may gradually and easily pass
into gear with the concentric portion thereof as may be understood by reference
to Figures 1, 2, 8. Figure 2 representing the rack F f as just ontering into
gear with the segment E e at the proper moment for the commencement of the
movement of the bed to the left, Figure 1 representing the bed as having started
to the left and the rack fully in gear with the eccentric portion of the segment, and
Figure 3 representing the curved portion of the rack and the eccentric portion
of the segment as leaving each other and the straight portion of the rack and
concentric portion of the segment as coming into gear while the bed continues
its movement to the left.
The straight portion F of the rack and the corresponding concentric portion E'
of the segment operate together like those of the ordinary registering gearing that
is to say while they are properly in gear the bed and the operating surface of the
cylinder both have the normal corresponding speed required for printing but the
eccentric portion of the segment having a shorter radius than the concentric
portion, corresponds with a slower movement of the rack and the bed as compared
with that of the cylinder. Now as at the time of the cylinder and bed coming
into gear the bed is inclined to move at a slower speed than the cylinder, the
correspondingly greater movement of the cylinder during a given movement of
the bed is compensated for by the shorter radius of the segment, and the segment
and the rack come into gear without thumping, and the bed is, by the progressively
increasing radius of the rack, gradually and quietly brought up to the speed of
the cylinder so that by the time the concentric portion of the segment and straight
portion of the rack come into gear the relative movements of the bed and cylinder
have become normal.
The operation of the segment Ee of the cylinder C, and the rack at the
other end of the bed is precisely the same na that described with reference to E¹ e¹
and Ff except that the movement of the bed is reversed.
The eccentric curvatures of the heads of the segments and the corresponding
curvatures of the portions f f of the racks may be varied considerably without
departing from the spirit of our invention but we have found in practice that the
curves of the heads of the segments may be in true arcs of circles described
with a radius much shorter than the radius of the concentric portions E¹ E' of
the segment, as may he understood by reference to Figures 2 and 3. The curves
of the raised portions fif of the racks will be so laid out that said portions may
run properly in gear with the portions e¹e of the segments which are eccentric
to the cylinder.
In the modification of my invention shown in Fig. 4, the concentric portion E¹
of the segment and the straight portion F of the rack are toothed, but the cocen-
tric portion el of the segment and the corresponding curved portion f¹ of the rack
are toothless, the faces of the said toothless portions being laid out on curves
corresponding with the pitch lines of the teeth of the eccentric portions of the
segments and the teeth of the raised curved portions of the racks described in
Figures 1, 2 and 3, so that there is between the said faces a simple frictional
contact by which the cylinder and bed may be brought properly into register.
This improvement is obviously applicable to flat bed cylinder printing machines
in which only a single impression cylinder is used.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, as communicated by
our foreign correspondent, I declare that what I claim is:-
1. The combination with the impression cylinder and the reciprocating bod
of a printing machine, of a registering segment provided on said cylinder and
having a portion of its length eccentric to the axis thereof, and a registering rack
provided on the bed for gearing with the eccentric portion of the segment, sub-
tantially as and for the purpose herein described.
2. The combination with the impression cylinder and the reciprocating bed of
a printing machine, of a registering segment provided on said cylinder and having
a varying radius, and a rack provided on the bed and having a portion of its length
so curved to correspond with the varying radius of the said segment that the said
segment and rack may remain in gear during a portion of the rotation of the
cylinder and movement of the bed, substantially as herein described.
3. The combination with the impression cylinder and the reciprocating bed
of a printing machine, of a registering segment provided on the cylinder and
having one portion of its length concentric with the axis of the cylinder and
another portion eccentric to said axis, and a registering rack provided on the bed
and having a portion of its length straight to gear with the said concentric portion
of the segment and a curved portion for engaging with the eccentric portion of
the segment, substantially as herein described.
and the 101
T
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant