IMPROVEMENTS IN MACHINES FOR MAKING PAPER BOARD
Year: 1865

page_text: PROVISIONAL SPECIFICATION left by John Franklin Jones at the Office
of the Commissioners of Patents, with his Petition, on the 4th January
1865.
I, JOHN FRANKLIN JONES, of Rochester, in the County of Monroe, and
State of New York, United States of America, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN MACHINES FOR MAKING PAPER
BOARD," to be as follows:-
The object of my improvement is to produce paper board in a continuous
indefinite length by a peculiar construction and arrangement of parts as
herein-after described.
In paper-making two distinct classes of machines have been employed,
namely, the cylinder machine, in which a cylinder takes the pulp from
a vat in which it runs, and deposits it upon a felt that passes between
press rollers; and, second, the Fourdrinier machine, in which a wire-cloth
apron is employed, which receives the layer of pulp, and deposits it upon
the felt to be run through the press rollers in the same manner. My
improvements combine in a degree the qualities of both these classes of
machines.

page_text: Around said rollers passes an endless
A suitable frame is employed, on which is mounted in any desirable manner
a large hollow cylinder composed of two end rims or rings, connected at a
short distance from the periphery by longitudinal rods on which rests a
covering of wire cloth permitting the passage of water, filling the entire space
between said rings. The cylinder may be supported in any convenient
manner, and revolved by any suitable means. Around this cylinder in a circle,
and at a suitable distance therefrom, are arranged pressing rollers. These
rollers may extend entirely or only partially around the cylinder. They are
made adjustable in reference to the cylinder by means of pressure screws and
coiled springs, or other suitable devices. The induction roller at the top has
a pressing device so arranged as to force said roller away from the cylinder to
admit the pulp, and the other rollers have the pressing device so arranged as
to force the rollers down to the work. The boxes of these rollers may be
kept in position by means of set screws.
wire mesh apron. The distance between this apron and the cylinder is sufficient
to allow the necessary depth of pulp to form the required thickness of board.
The distance between the cylinder and apron may be varied by the said screw
and spring, or other convenient means. The pulp from the hopper passing
between the cylinder and endless apron is compressed into a web. When
carried around to the last roller of the series by the motion of the cylinder
and rollers, it is taken up by an adjustable coucher, the latter being situated
at an angle equidistant from said roller, and another roller placed in an
exterior projection on the circular frame supporting said rollers surrounding
the cylinder. This coucher is made adjustable by means of a spring and set
screw, and presses the web against the two rollers. A felt passes around the
roller on the exterior of the circular frame, and another roller in the frame
of the machine, on which felt the web is carried between the said roller
in the frame, and a similar roller directly above. Within the cylinder is
situated a shallow receptacle or trough, preferably occupying the whole
diameter of the interior, and having a suitable discharge spout at one end.
This trough catches the water that is pressed from the pulp at the top of the
cylinder.
The suction box employed is composed of three longitudinal grooved rollers,
made of india-rubber or other suitable material, situated within the cylinder
at the top. The two upper ones reach the wire cloth surrounding the cylinder,
and the lower one works between the other two, forming a tight enclosed
space between the three rollers and the cylinder. These rollers have suitable
end bearings, and an escape pipe opens from the said enclosed space. I
employ also a vibrating or reciprocating bar in the hopper for the purpose of

page_text: interweaving the fibres of the pulp, and properly feeding the same into the
space between the cylinder and the endless apron. This bar is preferably
formed with rings and intermediate spaces, and receives its motion in any
convenient manner.