Improvements in Embossing and Planishing Machines.
Year: 1897

page_text: Date of Application, 18th May, 1897
Complete Specification Left, 7th Feb., 1898-Accepted, 23rd Apr., 1898
PROVISIONAL SPECIFICATION.
Improvements in Embossing and Planishing Machines.
I, FRÉDÉRIC GEORGES SEVETTE, of 10, Cite Nys, Rue de l'Orillon, Paris, in the
Republic of France, Engineer, do hereby declare the nature of this invention
to be as follows:-
My invention has for its object to provide a machine for effecting the emboss-
ing and planishing of sheet metal or other material.
In embossing machines as hitherto used the blank to be acted upon is pressed
between two fixed surfaces, the pressure being either spring pressure or pressure
effected by cams or bent levers so that the material of the blank is caused to take
the shape desired.
According to my invention I replace one of the said surfaces by a surface pro-
vided with steel balls and having a movement of rapid rotation. These balls act
as a great number of embossing and planishing tools and aid in the proper
molecular displacement of the material and form and planish the blank without
necessitating a great pressure; so that the material is much less strained than
hitherto and the product is free from folds and perfectly smooth.
A machine may be arranged according to my invention as follows:-
The matrix is carried by a support mounted so as to turn on conical rollers.
The said support is mounted on a hollow shaft to which, at the requisite periods
rapid rotation can be imparted by any suitable means such as by providing the
extremity of the hollow shaft with a pulley driven at the requisite intervals as
hereinafter explained. For plain work it suffices to place the aforesaid balls on
the upper surface of the matrix. Means are provided for keeping the balls in place
whilst allowing of their rolling in every direction.
For embossed work an internal cavity in the matrix is filled with balls pressed
upwards and kept against the surface of the blank by a spiral metallic spring
pressing against a cylinder sliding in the centre of the support of the hollow
matrix and bearing on a plate forming the bottom of the cavity containing the
balls.
The upper surface may be raised and lowered by a crank and gearing or operat-
ing devices of any suitable description.
Rotatory movement is given to the matrix by a band passing over the pulley
at the lower end of its aforesaid hollow shaft and over a pulley which is loose on a
shaft driven from the other parts of the machine the said loose pulley being driven
by a clutch which is engaged and disengaged at the downward and upward move-
ments of the upper surface in order that the matrix shall only rotate during the
effective working period. To this end when the upper surface descends a cam_on
the driving shaft acts on a lever which, through a connecting rod, turns another
lever so as to cause a screw on the shaft on which the aforesaid loose pulley is fixed
to move in a screw nut and engage the clutch with the pulley which then imparts
rotation to the matrix during the time determined by the operating cam.
When the upper surface bears on the blank which is already pressed between

page_text: a fixed surface and the balls, the balls which are carried by the matrix act upon
the material of the blank and cause a very efficient action thereupon.
Dated this 18th day of May 1897.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.
Improvements in Embossing and Planishing Machines.
J, FRÉDÉRIC GEORGES SEVETTE, of 10, Cite Nys, Rue de l'Orillon, Paris, in the
Republic of France, Engineer, 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:-
My invention has for its object to provide a machine for effecting the emboss-
ing and planishing of sheet metal or other material.
In embossing machines as hitherto used the blank to be acted upon is pressed
between the smooth surfaces of the stamp and matrix which are caused to approach
each other for that purpose so that the material of the blank is caused to take the
shape desired.
According to my invention I replace one of these surfaces by a surface pro-
vided with steel balls and having a movement of rapid rotation. The balls act
as a great number of embossing and planishing tools and aid in the proper
molecular displacement of the material and form and planish the blank without
necessitating a great pressure so that the material is much less strained than
hitherto and the product is free from folds and perfectly smooth.
I will describe my invention referring to the accompanying drawing which shews
in vertical section the stamp and matrix of an embossing and planishing machine
constructed according to this invention.
The matrix 1 is carried by a support 2 mounted so as to turn on conical rollers 3.
The said support 2 is mounted on a hollow shaft 4 to which rapid rotation can
be imparted when the stamp or plunger 5 forming the upper surface enters the
matrix 1, by a pulley 6 for example provided at the end of the hollow shaft 4
driven at the requisite intervals by suitable mechanism. For plain work it suffices
to place the aforesaid balls on the upper surface of the matrix that is to say on the
plane surface 7. Means are provided such as cavities for keeping the balls in place
whilst allowing of their rolling in every direction.
For embossed work an internal cavity 8 in the matrix 1 is filled with balls, which
are pressed upwards and kept against the surface of the blank 14 by a spiral spring 9
pressing against a cylinder 11 sliding in the centre of the support 2 and bearing
on a plate 10 forming the bottom of the cavity containing the balls.
As the upper surface or stamp 5 descends the matrix 1 is rotated by mechanism
operating the pulley 6, the matrix transmits its motion to the balls; and when the
stamp 5 reaches the surface of the blank, which is already held between the fixed
surface 12 and the surface 7 formed by the revolving balls, the balls which fill
the internal cavity 8 in the matrix 1 act upon the material of the blank over the
surface of the stamp no matter what shape it may be and cause a very efficient
action thereupon.
The stamp thus works on the blank 14 between a fixed upper surface 5 for the
top side of the blank, and a lower surface formed of rotating balls for the under
side of the blank except for the bottom 13 of the counter part. When the stamp
has descended the desired amount the rotary movement is stopped and the embossed
piece is raised by the spring 9.

page_text: Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is :-
1. An embossing and planishing machine in which the matrix is provided with
balls and rotated during the operation of the stamp or upper surface, the said
matrix being mounted on a support 2 fast on a hollow shaft 4 formed with a pulley 6
set in motion when required, the rotation of the matrix causing a large number
of balls to revolve under the blank which by their action avoid the formation of
folds during the operation and aid in the molecular displacement of the material
while polishing or planishing the surface of the blank substantially as herein before
described with reference to the drawings.
.
2. An embossing and planishing machine with rotating matrix in which a large
number of rolling balls are kept on the upper surface 7 of the matrix in order to
facilitate the deformation of the blank and to avoid the formation of folds substan-
tially as and for the purposes hereinbefore described.
3. An embossing and planishing machine with rotating matrix in which an
internal cavity in the said matrix is filled with rolling balls which are pressed up-
wards by a spring an intermediate cylinder and a plate forming the base of the
cavity so that the surface of the blank is embossed and polished or planished
simultaneously substantially as hereinbefore described.
Taded thin 4th W
1000
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.