DANDY ROLL CARRIAGES
Year: 1885

page_text: "
THOMAS ALLEN MARSHALL of Campbell Works Stoke Newington London
Engineer Dandy Roll & Paper Mould Manufacturer do hereby declare the nature
of my invention for DANDY ROLL CARRIAGES to be as follows:-
It has been well known for some years past since the increased width of paper
making machines that Dandy Rolls constructed upon the principle first introduced
were too heavy for the proper watermarking of some classes of paper & crush the
pulp causing a bad appearance & occasioning "retree."
Several attempts to introduce lighter forms of Dandy Rolls have met with
failure owing to the impracticability of producing Dandy Rolls of such increased
length of a sufficiently durable nature.
The great objection to these lighter forms of Dandy Rolls is their liability to
get damaged and "out of round thereby producing unequal watermarks and
surfaces upon the paper.
Now as before stated Dandy Rolls constructed upon the system first introduced
viz of a centre tube or axe with brass plates fixed to the same and turned true on
its axis and provided with a wire backing and cover commonly called "Laid and
Wove" have been found in many instances to be too heavy owing to the said
increase in the width of the Dandy Roll corresponding with the increased width
of the paper-making machine.
The object of my invention is to provide means of carriage by a Carriage, or
Carriages to relieve the pressure or weight of such heavy and substantially made
Dandy Roll" from pressing upon the paper pulp which travels under the
Dandy Roll.
For this purpose I provide a lever or levers attached to a jaw or bearing working
on a swivel joint adjusted horizontally by a screw passing through a round nut
which is inserted into the centre of the said lever or jaw bearing or other such
balancing application.

page_text: These levers may be attached to work together or separately as hereinbefore
described.
I sometimes apply bearings sliding between prismatic arms or cheeks or any
other sliding appliances lifted or adjusted by means of weights or springs working
automatically or otherwise or any other mechanical appliance for balancing the
Dandy Roll above described and relieving the pressure or weight of such Dandy
Roll from the pulp.
By my system the weight of the said Dandy Roll can be balanced or lifted
entirely or can be so regulated that any desired pressure or weight may be placed
upon the paper pulp.

page_text: I, THOMAS ALLEN MARSHALL, of Campbell Works, Stoke Newington, London,
Engineer, Dandy-Roll and Paper Mould Manufacturer, do hereby declare the
nature of my invention for DANDY-ROLL CARRIAGES, and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement :--
Dandy-Rolls, used by paper manufacturers, as originally constructed,. consist of
a centre tube or axle with brass plates attached and provided with wire backing
and cover commonly called "Laid and Wove."
Paper-making machines have of late years been considerably increased in width,
and the Dandy-Rolls are found to be too heavy for general practical use, being by
reason of their weight liable to crush the pulp and cause a bad appearance to the
paper, and occasioning what is known to the trade as "retree."
A lighter form of Dandy-Roll of the width required to be used has been found
to be ineffectual, being by reason of its lightness liable to get "out of round"
producing unequal watermarks and surfaces upon the paper, it is also easily
damaged, and it is found impracticable to construct them in a light form of a
sufficiently durable nature..
My Dandy-Roll Carriages obviate all these objections as they are so designed
that by means of their use either coupled or separate, as may be required, the
heavy weight of the substantially made Dandy-Roll can be so regulated that the
Dandy-Roll is entirely prevented from unduly pressing upon the paper pulp which
travels beneath it.
To accomplish this result I provide at each end of the Dandy Roll a lever or
levers, as may be required, which I attach to a jaw or bearing working on a swivel
joint adjusted vertically by a screw which passes through a round nut inserted into
the centre of the said lever or jaw bearing, or such other balancing power.
Where levers are required, I attach one to the other so that they may work
simultaneously.
When required I can dispense with the screw and in lieu thereof apply an
automatic arrangement for the purpose of lifting or lowering the Dandy-Roll by
ineans of a chain or wire cord attached to the jaw or bearing and working on two
or more pulley wheels, as may be required, which may be fixed to the wall or
ceiling in the usual way,-and having a weight attached to the end of the chain
or wire, cord equivalent to the pressure required on the pulp and the weight of the
Dandy-Roll.
Whichever means are adopted my Dandy-Roll Carriages effectually enables the
weight of the Dandy-Roll to be balanced, or lifted entirely, or it can be so regulated
that any desired weight or pressure can be placed upon the paper pulp.
In the accompanying drawings Figure 1-shows the Dandy-Roll Carriage in its
entirety. A is the lever attached to the jaw or bearing B working on the swivel
joint C. C.-D is the screw passing through the round nut or swivel joint C. C.-
E is the weight suspended on the lever A-F is the foot or stand.-G. G. is the
side of the paper machine on which it is fixed.

page_text: Figure 2-shows the automatic arrangement when the screw is dispensed with-
H is the chain or wire cord attached to the jaw or bearing B. J: J. are the pulley
wheels-K is the weight attached to the end of the chain or wire cord H.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner it is to be performed, I declare that what I claim is;
1-A Dandy-Roll Carriage or Carriages with a lever or levers attached to a
bearing and working on a swivel joint vertically adjusted.
2-A Dandy-Roll Carriage or Carriages with levers so attached one to the other
that they may work simultaneously.
3-A Dandy-Roll Carriage or Carriages that may be worked by means of a
chain or wire cord, having a weight attached thereto, and passing over two or
more pulley wheels.
4-A Dandy Roll Carriage or Carriages that enables the weight of the Dandy-
Roll to be balanced or lifted entirely, or so regulated that any required pressure or
weight may be placed upon the paper pulp.