Improvements in Machinery for the Manufacture of Glazed and Rolled Press Papers or Pressing Boards.
Year: 1893

page_text: Date of Application, 21st Jan., 1893--Accepted, 25th Feb., 1893
COMPLETE SPECIFICATION.
Improvements in Machinery for the Manufacture of Glazed and
Rolled Press Papers or Pressing Boards.
We, HOLMES WRIGHT, and JOHN JAMES WRIGHT, of the firm of H. &
I. W. Wright of Freedom Mills, Morton, Bingley, in the County of York, Paper
Makers, 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 :-
This invention relates to certain improvements in the manufacture of press
boards and the like, and has for its object, the production of a tougher board than
is made by machines as hitherto constructed.
It is well known that in the class of machine known as, a "Fourdrinier" the
fibres of the pulp supplied to the endless web, are by the well known mechanism
of the said machine more interlaced or interwoven with one another than is the
case with the pulp delivered to and deposited upon the mould of what is known as
a cylinder machine.
"
For the making of press boards and the like, the fibres should be more interlaced
or interwoven than they can possibly be in the cylinder machine, and for this
reason in order to accomplish our object we construct a machine on the "Fourdrinier'
principle, but with the finishing half of the machine on the principle of the
cylinder board machine, by which combination, we are enabled to make press
boards and the like much tougher and therefore better adapted than hitherto for
the purpose for which they are made.
In describing our invention more in detail, reference is made to the accompanying
drawings in which
Fig. 1 represents a side elevation of such portions of a paper making machine
as are affected by our invention, and
Fig. 2 is a plan thereof.
The pulp after being brought to the required consistency in suitable vats, is
allowed to escape therefrom by any of the well known meaus, and conducted from
thence by the inclined plane A in an uniform stream and deposited upon the surface
of the revolving web B formed of wire gauze, and is so placed, that the upper
surface thereof shall be as nearly level as possible, and passing round the rollers C
and D having rotary motion the web is conducted in the direction in which the
stream of pulp is flowing from the vat.
On the pulp arriving at the point X. it is stripped from the surface of the
travelling gauze web B. and deposited upon the "making roller" E. and upon a
sufficient number of layers being wrapped upon the said roller to form the required
thickness of sheets, the same may be stripped therefrom by the attendant running
a knife or the like along the grooves E¹ formed in the periphery of the "making
roller" E.
In order to prevent the pulp from running off the sides of the travelling web B.
we place the ordinary deckles F. F. above and under each edge of the revolving
web, the deckle straps F' F' passing round the rollers G and between the
deckles F. F. and the revolving web B. and by the said straps travelling in the
direction of web at an exactly corresponding velocity, the pulp is carried forward
on the web and prevented running off the sides thereof.
The underside of the web is supported by a number of rollers H. at such a
distance from each other as will prevent the web from being pushed or weighted
down by the pulp, and also to cause the pulp to spread itself uniformly upon the
zurface of the web, thereby facilitating in the production of paper of an uniform
thickness.

page_text: It will readily appear to persons conversant with paper making, that by means
of the shaking bar K. and its connection with the upright supports L. L. that the
said uprights may be vibrated some distance backward and forward in a horizontal
direction, thus carrying with them the roller C. so that whatever motion may be
given to these the same will be communicated to the web B. upon which the paper
is forming, and thereby the fibres of the pulp are more interlaced than is the case
with a cylinder machine.
The roller M is supported by levers N. N mounted to the frame of the machine
at O. as fulcrums, and provided with weights P. P. so that an upward pressure is
brought to bear upon the pulp when leaving the revolving web B.
In order to prevent the web B injuring the pulp by reason of the pressure on
same between the roller M and "making roller" E. the roller M may be covered
with felt or other soft suitable material, as may also be the carrying roller D.
Further pressure may be applied to the layers of partly prepared paper as they
pass round the "making cylinder" E by means of the roller S mounted in suitable
journals, and operated upon by the hand wheels W and screws attached thereto.
Motion may be given to the shaking bar K by a cam or its equivalent and to
the rollers supporting the revolving web B by straps or gearing.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be perforined, we declare that what we
claim is :-
In machinery and apparatus for the manufacture of glazed and rolled press
papers or pressing boards, the combination of the parts of a "Fourdrinier" machine
with the making roller of a cylinder board machine substantially as and for the
purpose herein set forth.
DOLL
Lane 1902
JOHN WAUGH,
Agent.