Improvements in Platen Printing Machines.
Year: 1895

page_text: Date of Application, 26th Feb., 1895
Complete Specification Left, 23rd Nov., 1895-Accepted, 28th Dec. 1895
PROVISIONAL SPECIFICATION.
Improvements in Platen Printing Machines.
We 'ERNEST JARDINE of The Park, Lace Machine Builder and ALFRED
ALLEN of 5 Addington Road, Mechanic in the Town and County of the Town of
Nottingham do hereby declare the nature of this invention to be as follows:-
Our invention has for its object a more ready means of adjusting the pressure
between the type bed and platen of that well-known class of platen printing
machine where the distance between the platen and type bed is regulated by
eccentrics formed at each extremity of the front shaft.
For this purpose we key on to one end of the front shaft a worm wheel and on
to the impression lever, which is otherwise of the usual construction, we journal,
that is affix by bearings, a worm which gears with the worm, wheel.
The worm can be revolved by a hand wheel which is keyed on to the front end of
the worm spindle.
By turning the hand wheel the worin is revolved which then rotates the worm.
wheel that is keyed on to the front shaft and consequently the eccentrics which are
turned on the extremities of the shaft. The links attached to these eccentrics
thus move the type bed either nearer or further from the platen, such distance
being regulated by the,throw of the eccentrics and the amount of rotation given to
the worm wheel.
+
t
This arrangement enables the printer by simply turning a band wheel to alter
or regulate the "impression" that is the pressure of the type on the material which
is to be printed.
$Dated this 25th day of Hohory 1905
ERNEST JARDINE.
ALFRED ALLEN.
1
COMPLETE SPECIFICATION.
.Improvements in Platen Printing Machines.
We, ERNEST JARDINE of The Park, Lace Machine Builder and ALFRED
ALLEN of 5 Addington Road, Mechanic, both in the Town and County of the
Town of Nottingham 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:―
'Our invention has for its object a more ready means of adjusting the pressure
between the type bed and platen of that well-known class of platen printing machine
where the distance between, the platen, and type bed is regulated by eccentries
formed at each extremity of the front shaft which is carried by bearings of the
usual construction formed in the body of the machine.
i
For this purpose we key on to one end of the front shaft, which is of the usual
construction, a worm wheel and on the impression lever, which is otherwise of the
usual construction, we journal, that is affix by bearings, a worm which gears with
a worm wheel.
The worm can be revolved by a hand wheel which is keyed on to the front end
of the worm spindle.

page_text: By turning the hand wheel the worm is revolved which then rotates the worm
wheel which is keyed on to the front shaft and consequently the eccentrics which
are turned on the extremities of the shaft.
The links attached to these eccentrics thus inove the type bed either nearer or
further from the platen, such distance being regulated by the throw of the eccentrics
and amount of rotation given to the worm wheel.
This arrangement enables the printer by simply turning a hand wheel to alter
the "impression " that is the pressure of the type on the material which is to be
printed.
In order that our invention may be more clearly understood and readily carried
into effect we will proceed, aided by the accompanying drawings, more fully to
describe the same.
By turning the hand wheel the worm is revolved which then rotates the worm
wheel which is keyed on to the front shaft and consequently the eccentrics which
are turned on the extremities of the shaft.
The links attached to these eccentrics thus inove the type bed either nearer or
further from the platen, such distance being regulated by the throw of the eccentrics
and amount of rotation given to the worm wheel.
This arrangement enables the printer by simply turning a hand wheel to alter
the "impression" that is the pressure of the type on the material which is to be
printed.
In order that our invention may be more clearly understood and readily carried
into effect we will proceed, aided by the accompanying drawings, more fully to
describe the same.
DESCRIPTION OF DRAWINGS.
Fig. 1. is a front view of our invention.
Fig. 2 is a side view.
Fig. 3. is the front view of our invention as located on a platen printing machine
of the usual construction.
Fig. 4. is a side view.
In all figures like parts are indicated by similar letters of reference.
A. is the worm wheel keyed fast to the front or eccentric shaft B.
C. is the worm.
The worm C., which is fastened to the worm shaft F., is turned by means of
the hand-wheel, G.
By turning the hand-wheel G. the eccentrics I and shaft B. are made to
rotate and thus slightly move backwards or forwards the links H. which are
attached or journalled at their front ends on the eccentrics I, turned on the ends of
the front shaft B.
:
The links H. are held on the eccentrics I in the usual manner by nuts J. and
washers K.
The back ends of links H. are attached to the type bed L in the usual manner.
If the links H. are moved forward by the eccentrics I. it will readily be seen
that the distance between the platen Q. and the type-bed L. is reduced and
consequently the pressure between the type and paper, placed on the platen, will
be increased...
If the links are moved backwards by the eccentrics the distance between the
platen and the type-bed will be increased and the pressure between the type and
paper decreased.
M. is the impression lever handle of usual construction which is shown in the
middle of quadrant P. for convenience in drawing. In actual practice this
impression lever handle is located at the end of the quadrant in the groove N.
when the impression is off, that is when the type and paper are required not to
touch.
The lever M. is moved from N. to O. when the impression is required to be
on for printing.
The impression lever M., the quadrant P., and the groove N. and O. are of
the usual construction.
'
We do not confine ourselves to the exact details given but
ment and sizes of the different parts without in any way departing from the
alter
may
arrange-
principle of our improved arrangement for adjusting the distance between the
platen and type-bed of this well-known class of platen printing machine.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we now declare that what
we claim is
. The combination of the worm and wheel with the front or eccentric shaft

page_text: and the links, constructed substantially as herein shown and described and for
the purpose stated.
Dated this Twenty-second day of November One thousand eight hundred and
ERNEST JARDINE.
ALFRED ALLEN.