IMPROVEMENTS IN MACHINERY FOR THE MANU- FACTURE OF PAPER
Year: 1868

page_text: PROVISIONAL SPECIFICATION left by Carl Heinrich Roeckner at the
Office of the Commissioners of Patents, with his Petition, on the
30th January 1808.
I, CARL HEINRICH ROECKNER, of the Hurstbourn Paper Mills,
Whitchurch, in the County of Hants, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN MACHINERY FOR THE MANU-
FACTURE OF PAPER," to be as follows:-
This Invention consists, first, in placing an endless cloth under the
wirework where the stuff enters upon it, and by this means retaining
the water in the stuff when it flows upon the wire. This enables the
stuff to distribute itself freely without losing its water too soon, as
the early loss of water prevents a lively circulation, which is a
very essential point to the due interlocking of the fibres. The effect
obtained thereby is the same as that which the vat man desires to
obtain by throwing a wave over the mould in the manufacture of
paper by hand.
Secondly. I place suckers or wipers under the wirework to wipe the
water off from its under side, they may be made of india-rubber or any
other suitable material and act like sponges so as to suck or lead the
water out of the stuff quickly but not too suddenly. Thus the stuff
is freed from water in a similar manner as in hand-made papers.
Air suction pumps or boxes act too suddenly and too forcibly.

page_text: Thirdly. Where a dandy roller is used I place a sucker or instru-
ment inside it to take up the water which enters through the roller
and discharge it at the end instead of allowing it again to flow back
through the roller upon the paper where it disturbs the fibro.
Fourthly. I employ india-rubber to form the surface of the coutch
rollers or one of them in order to save the wire from wear and tear
and more effectually to drive the water out of the paper and with
the application of less power.
Fifthly. After the paper has passed between the coutch rolls, instead
of drawing it from the wirework to lead it upon the felts at a point 1
about level with the axis of the lower coutch roll, whereby the
tenderly coherent fibres are unnaturally disturbed, I take the paper
from off this wiro at about the point where the wire leaves the lower
coutch roll. At this point also I apply a roller underneath the lower
coutch roll, and this new roll which may run within an endless 1
cloth or felt, or be covered therewith, receives the paper at about the
point where it would otherwise fall off from the wire. To prevent
the water which runs off the lower coutch roll from injuring the
paper I apply a roll at the back of the lower coutch roll inside
the wire so as to stop the descent of the water and lead it out sideways. 2
Sixthly. I also use india-rubber for one or all press rolls; these
rolls give with less power a more effective pressure than the metal
rolls now used and savo the felts from unnatural wear and tear.
Seventhly. The paper when leaving the wet felt is received between
two endless cloths which are carried over all the drying cylinders in
the same way as the paper, one cloth returning from the top, the
other from the bottom. An endless cloth may also be applied over
that press roll which now runs free.
By applying these several improvements as described when pulp is
run on to the wire it will be discharged as paper off the drying
cylinders without manual assistance being required during any part of
the process.