Ix- PROVEMENTS IN THE CONSTRUCTION OF PRESSES FOR STAMPING AND EMBOSSING
Year: 1873

page_text: LETTERS PATENT to Frederick Henry Dunnett, of Bury St. Edmunds,
in the County of Suffolk, Stationer, for the Invention of "Ix-
PROVEMENTS IN THE CONSTRUCTION OF PRESSES FOR STAMPING AND EMBOSSING."
Scaled the 0th September 1873, and dated the 11th March 1873.
PROVISIONAL SPECIFICATION left by the said Frederick Henry
Dunnott at the Office of the Commissioners of Patents, with his
Petition, on the 11th March 1973.
I, FREDERICK HENRY DUNNETT, of Bury St. Edmunds, in the County
of Suffolk, Stationer, do hereby declaro the nature of the said Inven-
tion for "IMPROVEMENTS IN THE CONSTRUCTION OF PRESSES FOR STAMPING AND
EMBOSSING," to be as follows :-
The object of this Invention is to facilitate the operations of stamping
and embossing. This I effect first by the employment of a treadle for
working the press screw, and, secondly, by applying an automatic feed
to the press.

page_text: Supposing the screw which works the dio or stamper to be stationary
in its bearing, I key to the screw spindle the ordinary fly, and mount
loosely on the spindle above the fly a grooved pulley, through the boss
of which I form a ring of holes to receive a pin for locking it to the fly.
To this pulley I connect a band, one end of which passes down to a 5
treadle or to a sector which is actuated by the treadle, the other end
being connected to a coiled or other spring, or to a counterweight.
By the depression of the treadle the lock pulley will be caused to turn
the screw and depress the die or stamper, and on the release of the
treadle the spring or counterweight will turn the pulley in the opposite 1
direction, thereby raising the die or stamper clear of the work. This
arrangement leaves both hands of the attendant free for presenting the
work to the fcoding apparatus, and for inking the die when colored
embossing is required to be effected.
When stamping envelopes or paper I apply an adjustable foeding 1
table to the press, which table is fitted with guido pulleys for receiving
traversing bands, tapes, or cords, which, by running on either side of the
fixed die, will present the work to the dies and discharge it from the
press when stamped. These cords I connect at one end to the grooved
pulley before mentioned, or to the fly leading them up to the same, by 2
means of suitable guide pulleys situate below the bed of the press. The
opposite ends of these cords I connect to springs or counterweights
which will serve to keep them always at tension. These cords or bands
pass under the feed board, and they receive the paper or envelopes there-
from, carrying the same up to stops fitted to the table to ensure the 2
proper adjustment with respect to the die of the material to be stamped.
The feed motion is effected by the drag of the springs or counter-
weights, and the discharge of the work by the pulley on the pross scrow,
which pulley after depressing the die will, on returning to its normal
position, give through its connection with the feed apparatus a reverse
motion to the bands, and thus cause the paper or other material placed
on those bands to discharge the stamped paper from the press.
The object of connecting the grooved pulley with the fly, as described,
is to provide for the vertical adjustment of the dio or stamper to suit
different thicknesses of material, or varying heights of counter dic,
without necessitating the rearrangement of the cords used in working
the grooved pulley.
L

page_text: By withdrawing the locking pin from the boss of the pulley the fly
may be turned any desired amount to adjust the height of the dic, and
then lock it to the pulley as before, when about half a turn of the pulley
will suffice to put the die into action.
SPECIFICATION in pursuance of the conditions of the Letters Patent
filed by the said Frederick Henry Dunnett in the Great Scal
Patent Office on the 11th September 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FRED.
ERICK HENRY DUNNETT, of Bury St. Edmunds, in the County of Suffolk,
Stationer, sond greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eleventh day of March, in the year of our Lord
One thousand eight hundred and seventy-three, in the thirty-sixth year
of Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said Frederick Henry Dunnett, Her special licence that
I, the said Frederick Henry Dunnett, my executors, administrators,
and assigns, or such others as I, tho said Frederick Henry Dunnett, my
exocutors, administrators, and assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exerciso,
and vend, within the United Kingdom of Great Britain and Iroland
the Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS
IN THE CONSTRUCTION OF PRESSES FOR STAMPING AND EMBOSSING," upon tho
condition (amongst others) that I, tho said Frederick Henry Dunnett,
3 my executors or administrators, by an instrument in writing under my,
or their, or one of their hands and seals, should particularly describo
and ascertain the nature of the said Invention, and in what manner
the same was to bo performed, and cause the same to be filed in tho
Great Seal Patent Office within six calendar months next and imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Frederick Henry Dunnett, do
hereby declare the nature of my said Invention, and in what manner
the same is to be performed, to be particularly described and ascertained
in and by the following statement, reference being had to the

page_text: Drawing hereunto annexed, and to the letters and figures marked
thereon (that is to say) :-
The object of this Invention is to facilitate the operations of stamping
and embossing. This I effect, first, by the employment of a treadle
motion for working the press screw; and, secondly, by applying an {
automatic feed to the press.
In the accompanying Drawing Fig. 1 is a front elevation of a stamping
press with my improvements applied thereto; Fig. 2 is a side elevation
of the same; and Fig. 3 is a partial plan or top view of the press.
A is the bracket standard of the ordinary fly press; B is the screw :
for working the stamper G, which is held up in contact therewith by
sustaining springs C'; D is the fly keyed to the screw spindle as usual.
Fitting into the bed of the press is the dio box E for receiving an em-
bossing die E'. Mounted loosely on the screw spindle above the fly is a
grooved pulley F, through the boss of which I form a ring of holes (see:
Fig. 3), and in the fly I form a hole with which the holes in the boss of
the pulley may be severally brought to coincide. By means of a pin ƒ
I lock the pulley and fly together, so that the axial movement of the
pulley will ensure the working of the scrow B. The object of thus
connecting the grooved pulley with the fly is to provide for the vertical
adjustment of the stamper to suit different thicknesses of material, or
varying heights of counter die without necessitating the rearrangement
of the cords used in working the grooved pulley.
By withdrawing the locking pin from the boss of the pulley the fly
may be turned any desired amount to adjust the height of the stamper,
and then locked to the pulley, as before, when about half a turn of the
pulley will suffice to put the stamper into action. To this pulley I
connect one end of a band or cord G, the other end of which band is
secured to a grooved pulley H mounted on a stud axle carried by a
standard I. This pulloy I fit with a crank pin which receives the end
of a connecting rod K leading up from a treadle L having its fulcrum
at M. Near the attachment of the band G on the pulley F, I connect a
second band or cord G', the free end of which I lead over a guide
pulley G³ mounted in a standard G³, and either weighted or connected
with a fixed spring as at G', Fig. 2.
By the depression of the treadle L, the pulley I carrying the crank
pin will be caused to pull upon the band G and give an axial motion to

page_text: the grooved pulley F. This movement of the pulloy F will cause the
scrow B to run down in its bearing and depress the stamper C, forcing
the paper or other material underlying it into the embossing die. On
the release of the treadle the spring G' (which has yielded to allow of
this motion of the band) will contract, and drawing down the band G
will turn the pulley in the opposite direction, thereby raising the stampor
clear of the work. This arrangement leaves both hands of the attendant
free for inking the dio when colored embossing is required to bo
effected, and for presenting the work to the press.
I will now describe my improved feeding apparatus, which I proposo
to use in conjunction with my improved arrangement for working the
scrow. N is a feeding table, the top surface of which stands at about á
level with the face of the embossing die E. This table I fit at its
opposite sides with guide pulleys n for receiving traversing bands, tapes,
or cords O, which pass across the table, and are intended to present the
work to be embossed to the fixed die, and to dischargo it from the press
when stamped. Theso cords I weight at one end, as at o, Fig. 1, and
the other ends I lead under guide pulleys n³, thence to guide pulloys n²,
and upwards to guide pulleys n³, whence they pass to and are mado fast
to the periphery of the grooved pulley F. The table N I fit with an
adjustable stop P, under which the bands are free to pass. The envelopes
or sheets of paper intended to be embossed are laid upon the bands O,
and as the fly press is set in action these bands will carry the envelope
or paper under the stamper. Supposing the stop P to be properly
adjusted, the paper, when it has arrived under the stamper, will be held
or retained by the stop in the desired position for being stamped, so that
any further onward movement of the bands may take place without
affecting the position of the paper with respect to the embossing die.
This foed motion of the bands is caused by the drag of the pendent
weights o on the bands as they are slackened by the axial motion of
the pulley F when running down the screw B.
It will bo understood that by reason of the connection of the bands O
with the pulley F, the depression of the treadlo will serve to set the
feeding apparatus in motion. The action, however, of the stamper and
the bands O is so timed that the paper will be brought into position
immediately before the stamper has completed its descent. On the rise
of the stamper, caused by the reaction of the spring G³ as above.
described, the pulley F will pull upon the bands O and cause them to

page_text: make a rapid back movement, and thereby discharge the stamped paper
from the press.
Having now set forth the nature of my Invention of "Improvements
in the Construction of Presses for Stamping and Embossing," and
explained the manner of carrying the same into effect, I wish it to 5
be understood that under the above in part recited Letters Patent I
claim,―
First. The arrangement above described for working the screw of fly
presses from a treadle.
Secondly. The arrangement above described for feeding the work 1
automatically to and delivering it from the press.
In witness whereof, I, the said Frederick Henry Dunnett, have
hereunto set my hand and scal, the Fourth day of September, in
the year of our Lord One thousand eight hundred and seventy-
three.
]
TDENEDICK HENRY DINNEM