A Machine for Stripping Dried Plastic Material from Plates or Pads.
Year: 1888

page_text: Date of Application, 10th Dec., 1888
Complete Specification Left, 10th Sept., 1889-Accepted, 12th Oct., 1889
PROVISIONAL SPECIFICATION.
A Machine for Stripping Dried Plastic Material from Plates or Pads.
1, HENRY MICHAEL STEINTHAL, of Scarborough in the County of York, Managing
Director of the Scarborough Patent Tiled Floor Cloth Company Limited, do hereby
declare the nature of this invention to be as follows:-
--
My invention consists of a machine for stripping dried plastic material from plates or
pads, and has been specially designed for stripping layers or sheets of paint composition
from plates or pads upon which they have been spread to dry, in order that they may
be subsequently employed in the manufacture of floor cloths, wall coverings, or other
like purposes.
My machine consists essentially of (1) a revolving cylinder against which the plates
to be stripped are placed singly; (2) of gripper or clip bars, which revolve with the
cylinder and take hold of the successive plates and carry them round; (3) of a curved
guide or guides for the plates to rest on while being carried round by the gripper or
clip bars; (4) of a knife or stripper for removing the material from the plates as they
are being carried round; and (5) of a travelling band to receive and carry away_the
material as it is stripped off.
Having explained the nature and main features of the machine I will proceed to
describe more in detail the manner in which it can be constructed.
In suitable bearings I mount the shaft of a rotating horizontal cylinder or drum;
in the periphery of this cylinder are one or more transverse recesses extending the
whole length of the same; there may be, say three of these recesses arranged at equal
distances apart. In each recess is a gripper or clip bar, which is fitted with springs
tending to pull it inwards. Outside the cylinder the gripper or clip bar has at each
end a roller to run over a fixed cam or curved guide, which, at a certain point of the
revolution of the cylinder, forces the gripper or clip bar outwards. At this point, that
is to say when the bar is forced outwards, the end of the plate to be stripped is inserted
under the bar so that the bar, when it has passed the cam shall, on being pulled in
again by its springs, grip or clip the plate and carry it round. Facing the cylinder is
a curved guide, against which the sides of the plate rest while moving round with the
cylinder; this guide prevents the plates falling upon the travelling band below.
Ünderneath and in contact with the cylinder is a knife or stripper which at the proper
time is moved downwards by means of rotating arms on the cylinder shaft so as to let
the front end of the plate pass it, and is then immediately raised by springs so as to
bear against the face of the plate upon a part thereof near the end not covered by the
material. Consequently, as the plate continues to move round with the cylinder, the
knife, bearing as it does upon the covered face of the plate, strips the plastic material
therefrom. Below the cylinder is the travelling band which receives the stripped
sheet and carrys it away, while the bare plate is carried further round with the cylinder
and is released when the gripper or clip bar is moved outwards at the next action of
the cam.
The plates, on being released, fall upon a receiver or guard, which prevents
their reaching the travelling band. The material stripped off the plates will not, as a
rule, be received by the travelling band itself, but by trays fed continuously to the band
at one end of the machine, and removed at the other end.
13
LLL
J. C. MEWBURN,
169, Fleet Street, London, Patent Agent.

page_text: COMPLETE SPECIFICATION.
A Machine for Stripping Dried Plastic Material from Plates or Pads.
I, HENRY MICHAEL STEINTHAL of Scarborough in the County of York, Managing
Director of the Scarborough Patent Tiled Floor Cloth Company Limited 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 consists of a machine for stripping dried plastic material from plates
or pads, and has been specially designed for stripping layers or sheets of paint
composition from plates or pads upon which they have been spread to dry in order
that they may be subsequently employed in the manufacture of floor cloths, wall
coverings or other like purposes.
My machine consists essentially of (1) a revolving cylinder against which the plates
to be stripped are applied singly; (2) of gripper or clip bars which revolve with the
cylinder and take hold of the successive plates and carry them round; (3) of a curved
guide or guides for the plates to rest on while being carried round by the gripper or
clip bars (4) of a knife or stripper for removing the material from the plates as they
are being carried round; and (5) of a travelling band to receive and carry away the
material as it is stripped off.
Having explained the nature and main features of the machine I will proceed to
describe more in detail the manner in which it can be constructed and for this purpose
will refer to the accompanying drawings of a machine in which my invention is
embodied. Figure 1 is a side elevation of the machine and Figure 2 an end view
partly in section. Figure 3 is a detail view showing the stripping-knife and its carrier
and the rotating arms which operate it as hereinafter described.
In suitable bearings I mount the shaft a of a rotating horizontal cylinder or drum b;
in the periphery of this cylinder are transverse recesses cc, extending the whole length
of the same and arranged at equal distances apart; in the machine shown there are
three of these recesses, but the number is optional. In cach recess c is a gripper or
clip bar d which is fitted with springs e e tending to pull it inwards; these springs are
shown as attached at the one end to a bar or rod that connects the two ends of the
clip bar, and at the other end to the cylinder shaft a; the bar fand the ends of clip
bar move in guides gg in the cylinder ends. Outside the cylinder & the gripper or
clip bar & las at each end a roller to run over a cam or curved guide fixed to the
machine frame which at a certain point of the revolution of the cylinder forces
the gripper or clip bar outwards as will be seen on reference to the top bar d in the
figures, the springs ee being thereby stretched. At this point, that is to say when the
bar d is forced outwards, tabs or loops attached to the end of the plate to be stripped
are inserted under the bar d so that the bar when it has passed the cam i shall on
being pulled in again by its springs e e grip or clip the plate by its tabs and carry it
round. Facing the cylinder is a curved guide k against which the sides of the plate,
which is indicated in dots at 1, rest while moving round with the cylinder; this guide k
prevents the plates falling upon the travelling band m below. Underneath and in
contact with the cylinder is a knife or stripper n; it is carried by a horizontal
spindle p to which are attached arms qq held down by springs which tend to keep
the knife raised but at the proper time the knife is moved downwards so as to let the
front end of the plate pass it; this downward movement is effected by means of one of
the rotating arussss mounted on and rotating with the cylinder shaft a; the arm comes
in contact with and forces down the levert carried by the spindle p and thereby
depresses the knife. As soon as the arms has passed the levert the knife is immediately
raised. by the springs rr so as to bear against the face of the plate upon a part thereof
near the end not covered by the materal. Consequently as the plate continues to
move round with the cylinder b the knife n bearing as it does upon the covered face
of the plate, strips the plastic material therefrom. Below the cylinder is the travelling
band m which receives the stripped sheet and carries it away, while the bare plate is

page_text: carried further round with the cylinder band is released when the gripper or clip bar d
that holds it is moved outwards at the next action of the cam i. The plates on being
released fall upon a receiver or guard u which prevents their reaching the travelling
band m. The band m passes round rollers at the two ends of the machine, the shaft
of one of these rollers being driven by belt gearing ww from a pulley on the
cylinder shaft a. The shaft a in the arrangement shown derives its motion from the
driving shaft y by a worm z and worm wheel, but it is evident that any other
suitable arrangement for imparting motion to the machine can be adopted. The
material stripped off the plates will not as a rule be received by the travelling band m
itself but by trays fed continuously to the band at one end of the machine and removed
at the other end.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A machine for stripping dried plastic material from plates or pads, comprising
a revolving cylinder against which the plates to be stripped are to be applied singly,
gripper or clip bars revolving with said cylinder to tako hold of the successive plates
and carry them round, a curved guide for the plates to rest on while being carried
round, a knife or stripper for removing the material from the plates as they are being
carried round, and a travelling band to receive and carry away the material as it is
stripped off, substantially as set forth.
2. The combination with the revolving cylinder b, gripper or clip bars d d revolving
with said cylinder, guide k, pivoted knife or stripper n and travelling band m, of a
fixed cam or curved guide i for forcing said gripper or clip bars outwards, and of
springs e e for drawing said bars inwards, substantially as set forth.
3. The combination with the revolving cylinder b, gripper or clip bars d d revolving
with said cylinder, guide k, pivoted knife or stripper n and travelling band m, of the
rotating arms sss for depressing the knife, and of the springs for again raising it,
substantially as set forth.
4. The combination with the revolving cylinder b, gripper or clip bars d d revolving
with said cylinder, guide k, pivoted knife or stripper n, and travelling band m, of the
receiver or guard u to receive the stripped plates when released by the bars d d,
substantially as set forth.
"
5. In a machine for stripping dried plastic material from plates or pads, the
combination of the following devices constructed and operating as and for the purposes
set forth, viz the revolving cylinder b, the gripper or clip bars d d revolving with
said cylinder, the fixed cau i, the springs e e, the guide k, the pivoted knife or
stripper n, the springs rr, the rotating arms sss, the travelling band m, and the
receiver or guard u.
Dated this 7th day of September 1889.
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Patent Agent.