PROVEMENTS IN PRINTING MACHINES
Year: 1878

page_text: PROVISIONAL SPECIFICATION left by the said Alfred Partridge at the
Office of the Commissioners of Patents on the 30th August 1878.
ALFRED PARTRIDGE, of Birkenhead, in the County of Chester, Engineer.
PROVEMENTS IN PRINTING MACHINES."
"IM-
This Invention relates to printing machines in which a platen and a flat type
form are employed, and has for its object to produce a printing machine to be
operated by foot or power, which shall be cheap, durable, effecient, simple in con-
struction, have few working parts, and not liable to get out of order. For this
purpose I adjust or fit the type form to an inking table, of which the upper part is
curved or semicircular; and I cause such inking table carried by the type form and
the type form to rock or vibrate by means of a connecting rod operated by a crank
or other suitable means on an axis or shaft. The type form at one end of the
vibration or stroke comes in contact with and presses against a platen secured or
attached in an inclined position to the framework of the machine.
Contact with the inking surface of the inking table is effected at the other end
of the vibration or stroke by means of an inking roller revolving in an ink fountain
or trough.
Distributing rollers in bearings are held in position by connecting rods attached
to the vibrating table or to a projecting piece, secured, attached to, or formed with
the inking table or type form, at or near to the centre of curvature of the said
inking table, and by connecting rods attached or fitted to the framework of the
machine. The said rollers distribute ink over the surface of the table during the
vibratory or to-and-fro motion thereof. The said distributing rollers are preferably
set angularly and provided with long bearing, so that they may have a longitudinal
as well as a rotary motion.

page_text: Inking rollers fitting or secured in bearings held in position by connecting rods
attached to the framework, or otherwise suitably secured, carry ink from the
inking table and deposit it on the surface of the type or stereotype during the to-
and-fro motion of the type form and inking table..
The roller in the ink foundation or trough receives motion from a ratchet wheel
and click or pawl operated from any vibrating position of the mechanism.
The crank shaft, or its equivalent, receives motion from power in any convenient
manner.
The paper to be printed is placed on and removed from the stationary platen
during the vibrating of the type form, and stops are provided to hold the paper in
position.
The platen is kept in position by adjusting screws or other suitable means.
In this machine the distributing and inking rollers receive motion from surface
contact with table and type; gearing is not required.
The machine is also fitted with stop motion, so that contact between the type
form and platen can be immediately arrested without affecting the machine.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Alfred Partridge in the Great Seal Patent Office on the 28th
February 1879.
"
ALFRED PARTRIDGE, of Birkenhead, in the County of Chester, Engineer. 'IM-
PROVEMENTS IN PRINTING MACHINES."
This Invention relates to printing machines in which a platen and a flat typo.
form are employed, and has for its object to produce a printing machine, to be
operated by foot or power, which shall be cheap, durable, efficient, simple in con-
struction, have few working parts, and not liable to get out of order. For this
purpose I adjust or fit the type form to an inking table, of which the upper part
is curved.or semicircular; and I cause such inking table, carried by the type form,
and the type form to rock or vibrate by means of a connecting rod operated by a
crank or other suitable means on, an axis or shaft. The type form at one end of
the vibration or stroke comes in contact with and presses against a platen secured
or attached in an inclined position to the framework of the machine.
Contact with the inking surface of the inking table is effected at the other end
of the vibration or stroke by means of an inking roller revolving in an ink fountain.
or trough.
Distributing rollers in bearings are held in position by connecting rods attached
to the vibrating table or to a projecting piece securely attached to or formed with,
the inking, table or type form at or near to the centre of curvature of the said
inking table, and by connecting rods attached or fitted to the framework of the
machine. The said rollers distribute ink over the surface of the table during the
vibrating or to-and-fro motion thereof. The said distributing rollers are preferably
set angularly and provided with long bearings, so that they may have a longitudinal
as well as a rotary motion.
Inking rollers fitting or secured in bearings held in position by connecting rods
attached to the framework, or otherwise suitably secured, carry ink from the
inking table and deposit it on the surface of the type or stereotype during the to-
and-fro motion of the type form and inking table.
The roller in the ink fountain or trough receives motion from a ratchet wheel
and click or pawl operated from any vibrating position of the mechanism.
The crank shaft or its equivalent receives motion from power in any convenient
manner.
The paper to be printed is placed on and removed from the stationary platen
during the vibration of the type form, and stops are provided to hold the paper in
position.
The platen is kept in position by adjusting screws or other suitable means.
In this machine the distributing and inking rollers receive motion from surface
contact with table and type; gearing is not required.
The machine is also fitted with stop motion, so that contact between the type
form and platen can be immediately arrested without affecting the machine.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a sectional elevation of a printing machine constructed under my
Invention.
1, type form, formed with the inking table 2, the upper portion of which is semi-
circular. The inking table and the type form are caused to rock or vibrate on the
shaft 3 by means of the connecting rod 4 attached to the crank pin 5. Motion is
given to the spur wheel 6 and crank pin 5 by means of the treadle and gear 7; or
the said connecting rod 4 may be operated in any convenient manner, and any
suitable motive power may be employed. At one end of the vibration or stroke
of the type form 1 comes into contact with and presses against the platen 8 secured
or attached in an inclined position to the framework 9; at the other end of the

page_text: vibration or stroke the inking table 2 comes into contact with the roller 10, which
revolves in the ink fountain or trough 11; 12 are distributing rollers, held in
position by connecting rods 13 working in bearings attached to the inking table at
the centre of curvature thereof 14, and by the connecting rods 15 working in
bearings attached to the framework 9; 16 are inking rollers, which carry ink from
the table 2 and deposit it on the surface of the type or stereotype at 1. The
roller 10 in the ink fountain or trough receives motion by means of the ratchet
wheel and pawl 17; 18, adjusting screws to regulate the position of the platen, so
as to ensure a clear impression. The said platen may be variously fitted or
secured to the table, and is provided with stops or equivalent devices for holding
the paper to be printed in position; 19, excentric and lever for moving the platen
away from the type table when an impression is not desired.
Fig. 2 is an elevation of part of a printing machine constructed under my In-
vention, showing an alternative method of giving motion to the type form and
inking table.
1, type form; 4, connecting rod; 5, crank pin; 6, spur wheel; 9, frame.
Having now described the nature of the said Invention in such manner that
others will be enabled to carry my improvements into effect, I claim,-
First. Constructing a platen printing machine with a curved type form, secured,
attached to, or formed with an inking table vibrating on an axis or shaft, sub-
stantially as set forth.
Second. The general construction and arrangement of platen printing machines,
substantially as set forth.
In witness whereof, I; the said Alfred. Partridge, have hereunto set my hand
and seal, the
day of February, in the year of our Lord One
thousand eight hundred and seventy-nine.
ALF PARTRIDGE. (L.S:)