Improvements in Machines for Embossing Wood and other Substances.
Year: 1891

page_text: Date of Application, 12th May, 1891-Accepted, 20th June, 1891
COMPLETE SPECIFICATION.
Improvements in Machines for Embossing Wood and other
Substances.
We, GEORGE STABER and HARTWELL ABBEY, of 360 Clinton Street, Brooklyn,
in the County of Kings and State of New York, United States of America, Gentle-
men, 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 :-
The present invention relates to machines for embossing or charring wood and
other substances for the purpose of ornamenting the surface thereof; and the
improvement relates primarily to the mechanism by which the pressure roll is held
up to or against the stock or work by the direct application of the force of a spring
and at the same time the relative position of the pressure roll to the design roller
is subjected to the regulative action of an adjusting screw to accommodate the
rollers to stock or work of different sizes.
Our improvements further contemplate the easy and expeditious removal of the
design-carrying roll from the machine to permit the design to be changed on the
roll and to securely hold the said roller in its proper rotative position by simple and
easily manipulated devices.
And our improvements further contemplate the provision of a table or support
for the stock, capable of vertical adjustment and simultaneous movement with the
pressure roll and carrying guides which are adapted to be adjusted laterally whereby
the same may be set up or fixed at suitable points for the accommodation of stock
of various sizes and shapes.
With these ends in view, our invention consists of the combination and construc-
tion of parts, as will be hereinafter fully described and claimed.
In the accompanying drawings:
Fig. 1 is an elevation of a machine for embossing wood and other material con-
structed in accordance with our invention.
Fig. 2 is a detail sectional view of the means for applying spring pressure
directly to the pressure roll and for regulating the position of said roll relatively to
the design or embossing roll.
Fig. 3 is a detail view of a modified form of the pressure and regulating
device.
Fig. 4 is a perspective view of the vertically adjustable frame for supporting the
pressure roll.
Fig. 5 is a detail view of the device for supporting the design or embossing roll
and permitting its ready removal and replacement.
Fig. 6 is a similar view of the opposite side of the device showing the cap piece
let down.
Fig. 7 is a perspective view of the cap-piece removed.
Fig. 8 is a perspective view of the table for supporting the stock; showing the
same in connection with the frame for supporting the pressure roll and also showing
on the table the adjustable strips for guiding the stock; and,
Fig. 9 is a sectional detail view of said table showing one of the guide strips in
position.
In the said drawings: :-
A designates the main frame which comprises the fixed base a, and uprights or
standards arranged in two pairs, one pair being on each side of the machine.
B is the upper or design roller, and C is the lower or pressure roll.
As is usual in this class of machines to which our invention relates both the
pper and lower rolls are made hollow and suitable for the admission of pipes or

page_text: burners which are provided for supplying hot air or gas heat to the interiors of the
rolls for the purpose of highly heating the same, but as no novelty is herein claimed
on the means for heating said rolls we have not deemed it essential to illustrate the
means for that purpose.
The upper roll B is provided with an encircling band B' containing the pattern
or ornamentation it is desired to impart to the work or stock, or if desired two or
more pattern bands may be placed on the roll. The said upper roll has its hollow
trunnions c journaled in the fixed bearings or bridge pieces C¹ between the uprights
of the main frame and in order to secure the roll in the bearings and at the same
time permit of the ready release of said roll and its expeditious removal from the
frame we provide the adjustable cap-piece D one at each side. This cap piece has
at one side the lugs d, which are pivoted to one of the standards of the frame, and
at the free end of said cap piece we provide the bifurcated lug which is adapted
when said cap is lowered into position between the standards to embrace the other
standard of the pair of standards, a pivoted lever or catch E being provided on
said standard to take over the lug and thus lock or confine the swinging cap D
in place.
The cap is recessed or concaved on its lower edge to snugly fit over the hollow trun-
nions of the roll and it is obvious that when the roll is to be removed the only adjust-
ment required is to release the locking lever or catch E and swing the cap upward
and backward out of the path of the roll. The upper roll can then be easily removed
from the main frame to change the design band thereon and it can be replaced with
much ease and facility which is highly desirable in this class of machines where the
patterns are quite frequently changed.
In embossing machines for ornamenting wood which employ a stationary upper
design roller, it is essential to provide a lower pressure roller which constantly
bears against the stock with a given uniform pressure and which lower roll can be
varied in relation to such design roller to accommodate stock of different thick-
nesses or sizes. In our improved machine we provide a simple and compact device
which applies the necessary pressure to the pressure.roll direct from a spring and
the relative position of such roll is regulated by a screw, the detail construction of
which devices are as follows:
A vertically adjustable frame F is employed for supporting the lower roll C and
this frame is substantially yoke-shaped as indicated in Fig. 4 of the drawings,
said frame consisting of the vertical sides f. f, and the transverse bridge-piece g,
all of which constitute a single casting. The sides f, f, are recessed or grooved
vertically to adapt the standards b, b, to fit snugly into the frame and thus
guide the frame F in its vertical movements in the main frame, and the upper
edges of its side are concaved at f¹ to form the bearing for the hollow
trunnions of the pressure roll. In the centre of the bridge g of this adjustable
frame we provide a vertical aperture h, and through this aperture passes the
upper end of a vertical lifting rod or bar I arranged in about the vertical centre
of the machine. In the preferred embodiment of this part of our invention
shown in Figs. 1 and 2, of the drawings, we screw-thread the upper part of
this vertical lifting rod or bar and pass the screw-threaded portion loosely
through the hole in the adjustable frame and the lower end of the rod or bar
is passed through a hole in the base of the frame through which moves verti-
cally the rod having a spline as shown which takes into a corresponding groove
in the hole of the base whereby said rod may be prevented from turning as a
screw. On the screw-threaded upper portion of this rod or bar we place two
hand-wheels 2 and 3 and below said hand wheels a coiled pressure spring 4 is
arranged.
.
The screw threaded bar serves to transmit the pressure or force of the coiled
spring to the adjustable frame because the spring bears against the base of the main
frame and the upper hand-wheel 3 bears against the lower side of the adjustable
frame.
The height of the adiustable frame can be varied by simply turning the upper

page_text: hand-wheel 3 in the desired direction to raise or lower said frame and the pressure
roll according to the size of the stock it is desired to feed to the machine while the
tension of the spring and the pressure of the lower roll upon the stock can be varied
by simply adjusting the lower hand-wheel 2, said wheel 2 being lowered on the
threaded lifting rod if it is desired to compress the spring and increase the tension
thereof or raised when desired to slacken the spring and reduce the pressure of the
lower roll against the stock.
In Fig. 3 we illustrate a modification of our invention in which we employ a
single hand-wheel on the threaded rod and place the pressure spring between the
hand wheel and the adjustable frame so that the pressure of the coiled spring is
applied directly to the yoke-shaped frame. At the same time the elevation of the
frame F can be varied and the tension of the coiled spring thereon regulated by the
simple adjustment of the hand-wheel on the screw.
The operation and advantages of our invention will be readily understood and
appreciated by those skilled in the art to which it relates.
By special reference to Fig. 8 of the drawings, it will be seen that we have
provided a support or table for the stock which is designed to extend on opposite
sides of the machine in a similar manner and which being secured to the frame F
carrying the pressure roll will adapt itself to the upper surface of said roll by moving
with the latter and being sustained alike under yielding pressure will accommodate
itself to the thickness of the material.
The table is composed of two similar bars L having their longitudinal central
portions M provided with holes or the like for the reception of bolts or other suit-
able devices to fasten the same to the outer sides of the side pieces of the frame F.
These bars L are thence carried outwardly in opposite directions as shown and
terminate in horizontal branches N which are clevated to an altitude approximating
that of the surface of the pressure roll.
B indicate slotted cross bars carried by the clevated portions of the table
frame. The slotted bars are designed to receive the shanks of set-nuts Q
which are secured in one end of guide strips R and by means of said nuts the strips
may be moved to and from each other and secured in any desired position upon the
tables. The strips R are designed to serve as guides for the stock operated upon as
it enters and leaves the machine. While we have shown threaded rods and nuts for
setting up and adjusting the guide strips yet other suitable means might be employed
for that purpose.
We attach importance to the construction of the double table and to the
fact that it is secured to the frame carrying the pressure roll so that any move-
ment of one will cause a corresponding and synchronous movement of the other
thereby sustaining the stock in proper position with respect to the surface of the
pressure roll.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
1. In a machine for embossing or ornamenting wood and other materials, the
combination with an embossing roll and a pressure roll carried by an adjustable
frame, of a pressure spring which acts directly against said adjustable frame and
means for positively adjusting the frame to vary the height thereof and the relation
of the pressure roll to the embossing or design roll, substantially as described for
the purpose set forth.
2. In a machine for embossing or ornamenting wood and other materials, the
combination with an embossing or design roll and a pressure roll which is
carried by an adjustable frame of a pressure spring arranged to exert its force
directly against said adjustable frame, a threaded rod, and a hand wheel or nut
fitted on the rod for moving the adjustable frame positively to vary the relative
positions of the pressure roll to the embossing roll, substantially as and for the
purpose specified.

page_text: 3. In a machine for embossing or ornamenting wood and other materials, the
combination with an embossing or design roller and a pressure roll carried by an
adjustable frame, of threaded lifting rod arranged centrally to the adjustable
frame, a coiled pressure spring fitted on said rod and the independent hand-
wheels both fitted on the lifting rod, one wheel being in direct contact with
the adjustable frame to positively move the same and the other wheel bearing,
against the pressure spring for the purpose of varying the tension thereof, sub-
stantially as described.
4. In a machine for embossing or ornamenting wood and other materials, the
combination with an embossing roll, a pressure roll, the adjustable frame in
which said pressure roll is journaled provided with a central aperture the
vertically movable threaded rod fitted in the aperture of said frame, the coiled
spring fitted on the rod and the independent hand-wheels both fitted on the rod and
one arranged in contact with the adjustable frame and the other engaging the spring
substantially as described.
5. In a machine for embossing or ornamenting wood and other materials, the
combination of the standards having the fixed upper bearing, the embossing roll
journaled therein, the adjustable cap pivoted to one of the standards and arranged
to snugly fit over the trunnions of said roll, and a locking lever connected to the
other standard to engage the free end of the cap to confine the same in place when
it is lowered substantially as specified.
6. In a machine for ornamenting wood and other materials the combination
with the vertically movable frame for supporting the pressure roll, of a table
for supporting stock secured to and movable with said frame, substantially as
specified.
7. A. machine for ornamenting wood and other material, having a table for sup-
porting the stock, said table being yieldingly sustained and movable with the frame
supporting the pressure roll, substantially as specified.
8 The table having the depressed central portion and the horizontally elevated
portions adapted to extend on opposite sides of the main frame, substantially as
specified.
9. A stock-supporting table adapted to extend on opposite sides of the main
frame and having transversely disposed slots in combination with movable
guide strips and adjustable fastening devices for said strips, substantially as
specified.
10. The table composed of the two similar side bars L having the horizontal
terminals N, the transversely disposed slotted bars P, the guide strips R and the
set nuts for securing said strips in the slots, substantially as specified.
Dated this 12th day of May 1891.
W. P. THOMPSON & BOULT,
Agents for the Applicants.