Improvements in and relating to Dandy Rolls.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Dandy Rolls.
We, THOMAS ALLEN MARSHALL. and CHARLES DUDLEY MARSHALL, of Campbell
Works, Stoke Newington, in the County of London, Dandy Roll Makers, do
hereby declare the nature of this invention to be as follows:-
Our invention relates to dandy rolls and comprises an improved carriage there-
for, or method of mounting the said rolls, and also certain other improvements
hereinafter set forth.
In the specification of a former patent granted to one of us Numbered 15702
of 1885 a method of mounting dandy rolls is described wherein weighted levers
are employed for maintaining the said rolls in their operative position, whilst
at the same time admitting of a certain amount of play when required. This
arrangement though of considerable utility has the objection that the projecting
weighted ends of the levers extend for a considerable distance from the machine
and get more or less in the way of the operators. To obviate this objection we
now lispense with the weighted levers and employ springs or their equivalents
in lieu thereof.
According to our said invention we support the journals of the dandy roll in
suitable U-shaped bearings each of which is formed on, or attached to, a sleeve
adapted to fit easily over, and slide upon, one of the vertical tubular or hollow
brackets or supports secured to the bed or foot of the machine. These sleeves or
their equivalents are supported through suitable spiral or other springs upon
screwed discs, washers, or nuts threaded upon vertical adjusting screws one of
which passes centrally down each of the above mentioned tubular or hollow
brackets or supports and is rotatably mounted therein, and has keyed, pinned, or
otherwise firmly secured upon its upper extremity a knob or disc by which the
said screw can be rotated. To prevent the said discs, washers, or nuts from
rotating with the adjusting screws each of them is provided with wings or pro-
jections adapted to engage in slots formed in the vertical hollow or tubular
brackets or supports. It will be seen, therefore, that should the adjusting screws
be rotated in the one or other direction the discs, washers, or nuts will be raised
or lowered in accordance with the direction of rotation, and, through the before
mentioned spiral or other springs, the sleeves or their equivalents carrying,
through the U-shaped bearings, the dandy roll.
In some cases we find it convenient to provide a suitable pointer or index upon
each of the said discs washers or nuts which, in conjunction with a graduated
scale upon the sleeves or their equivalents, will show the amount of compression
of the supporting springs.
Instead of spiral or other springs it is obvious that we might employ blocks or
pieces of india-rubber or other suitable elastic material.
In combination with our improved spring-mounted dandy roll we may employ :
a steam pipe placed parallel to the said dandy roll but external thereto. This
steam pipe, which is provided with slots or nozzles through which the steam
escapes and plays upon the dandy roll, may be supported at each end in a suitable

page_text: bearing or bracket formed on, or firmly attached to, the sleeve which carries the
dandy roll. In order to admit of these brackets or the like being firmly secured
in any position to which they may be adjusted upon the said vertical tubular or
hollow sleeves, we provide each of the said brackets with a thumb screw adapted
to pass through a suitable hole formed in the cars of the said bracket and by the
screwing up of which thumb-screw the bracket can be firmly clamped, fixed or
secured in position upon the latter.
The steam pipe may be placed directly above the dandy roll, that is in a vertical
line passing through the centre of the latter, or we may so mount it as to be
situated parallel to the said dandy roll in relation to any other suitable part of
the external surface or periphery thereof. It will be obvious that we may adopt
any convenient means for rotatably mounting the said steam pipe in connection
with the dandy roll.
Another improvement consists in mounting in an adjustable manner upon suit-
able brackets secured to the bearings carrying the dandy roll, or to the herein-
before mentioned adjustable sleeve, another roller the periphery of which is
covered with felt, or other suitable absorbent material, and which bears against
the surface of the dandy roll, and is rotated by contact therewith. This roller
serves to cleanse the surface of the dandy roll by reason of the said covering of
felt, or other absorbent material soaking up any moisture or impurities thereon,
In its turn this roll may have its impurities taken off by a suitably-located and
mounted rotary or other brush. The impurities so brushed off are caught by a
trough or the like.
Dated this 16th day of February 1899.
T. ALLEN MARSHALL.
C. DUDLEY MARSHALL.
We, THOMAS ALLEN MARSHALL and CHARLES DUDLEY MARSHALL of Campbell
Works, Stoke Newington, in the County of London, Dandy Roll 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:
Our invention relates to dandy rolls and comprises an improved carriage there-
for, or method of mounting the said rolls, and also certain other improvements
hereinafter set forth.
In the specification of a former patent granted to one of us Numbered 15702
of 1885 a method of mounting dandy rolls is described wherein weighted levers
are employed for maintaining the said rolls in their operative position, whilst
at the same time admitting of a certain amount of play when required. This
arrangement though of considerable utility has the objection that the projecting
weighted ends of the levers extend for a considerable distance from the machine
and get more or less in the way of the operators. To obviate this objection we
now dispense with the weighted levers and employ springs or their equivalents
in lieu thereof.
In the accompanying drawings, wherein we have illustrated how our invention
may advantageously be carried into practice,
Figure 1 is a plan, and
Figure 2 is a front elevation of the two end parts of the roll and its supports
and attachments,

page_text: Figure is a rear view of one of such end parts.
Figure 4 is a side elevation with other parts not included in the previous
Figures.
Figure 5 is a vertical section through one of the supports drawn to a larger
scale, and
Figure 6 is a section on the line
Figure 2 showing the rotatable con-
nection of the steam pipe and means for clamping the same in an adjusted
position.
Like letters and numerals of reference refer to corresponding parts throughout
the drawings.
According to our invention the dandy roll is supported in suitable open or
U-shaped bearings each of which is formed on, or attached to, a vertical
sleeve c. Clamped upon each vertical sleeve e are two brackets and e provided
respectively with split bosses f and g having ears hand and clamping screws k
and by means of which the position of the said brackets d and e may be ad-
justed thereon. Upon the brackets & are carried supports m and n of the steam-
pipe hereinafter more particularly referred to, while the other brackets e
support in open bearings a roll 7 covered with felt or other absorbent material
and which is adapted to rotate in contact with the dandy roll a. The position
of the roll may be adjusted along the slots by means of nuts f.
1°
The vertical sleeves c are adapted to fit easily over, and slide upon, hollow
uprights secured to the bed or foot of the machine. These sleeves are supported
by springs contained within the said uprights in positions which may be
regulated by nuts w upon which the said springs e rest and central screw-threaded
spindles. These spindles extend throughout the length of the uprights
and are provided at their upper ends with hand-wheels y by which they may be
rotated. The uprights are provided with suitable slotted feet 1 in which they
may be rotatably adjusted and by which they are bolted or otherwise secured
to the reciprocating members 2 of the machine, as will be well understood, or to
pillars (shown by dotted lines in Figure 4) or any other suitable part. Upon
the said uprights are two vertical slots 4 and 5 into which wings or projections (
of the nuts i extend to prevent their turning. Within the same slots
are wings or projections 7 of a block S and through each of which blocks one of
the screw-threaded spindles freely pass. The vertical sleeves are connected
by screws 9 or otherwise to the blocks 8 which in turn rest upon the springs .
and 5
It will now be seen that upon the screw-threaded spindles being rotated in
one or the other direction through the hand-wheels y, the nuts will be raised
or lowered in accordance with the direction of rotation, and, through the springs v,
the blocks 8 and sleeves a carrying the dandy-roll and its attendant parts.
The nuts are each provided with an index which may consist of a screw 10
upon which a line is engraved and there is a graduated scale 11 upon the sleeve c
for the purpose of indicating the extent to which the springs are compressed
and the corresponding weight they support or the amount of counterbalancing..
Instead of the springs it is obvious that we might employ blocks or pieces of
india-rubber or other suitable elastic material.
In combination with the dandy roll we may employ a steam-pipe placed
parallel to the said dandy-roll but external thereto. This steam-pipe p which
is provided with a series of slits 20 arranged preferably in two rows (see Figures 2
and 6) through which the steam escapes and plays upon the dandy roll, may be
closed at one end where it is rotatably mounted in the support m, the position of
which support on the bracket d may be adjusted along the slot 21; while at the
other end it is seated as shown at 22 in its support which is provided with a
steam chest in a manner that admits of its being rotatably adjusted by the
handle 23. The said steam pipe may be clamped in position by means of the
screw-threaded extension 24 (which passes through the opposite end of the steam
chest o) and a clamping nut 25. Steam is supplied to the steam chest o by
flexible jointed or other suitable piping or connections 26.

page_text: The steam pipe may be placed directly above the dandy roll, that is in a vertical
line passing through the centre of the latter, or we may so mount it as to be
situated parallel to the said dandy roll in relation to any other suitable part of
the external surface or periphery thereof.
The roller q serves to cleanse the surface of the dandy roll a by reason of the
said covering of felt, or other absorbent material soaking up any moisture or
impurities on the said dandy roll. In its turn the said roller q may have its
impurities taken off by a rotary brush 13 (only shown in Figure 4) adapted to
be driven from any convenient source of power. The impurities so brushed off
are caught by a trough 14 or other suitable receptacle supported upon uprights 15
adjustably mounted upon the brackets e.
A long brush 16 (only shown in Figure 4) extending beneath the dandy-roll a
and adjustably supported by means of a bracket 17 adapted to be clamped to a
depending stud 18 or the pillar 3 may be provided. This brush 16 forms an
elastic support or backing across which the endless machine wire 19 carrying the
wet paper passes while being operated upon by the dandy roll a and it also
assists in carrying off the moisture thereby intensifying the water mark.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed, we declare that what
we claim is;-
1. A dandy roll carriage comprising a vertical sleeve carrying the bearing for
the roll, a hollow upright secured to the bed or foot of the machine, a spring or
its equivalent located within the said upright and serving to support the vertical
sleeve, and means serving to regulate the position of the vertical sleeve upon the
hollow upright.
2. In a dandy roll carriage such as referred to in the preceding claim, an index
such as 10 upon the adjusting device and a graduated scale upon the vertical
sleeve that carries the said roll substantially as set forth.
3. The improved dandy roll carriage substantially as described with reference
to Figure 5 of the accompanying drawings.
4. The combination, with a dandy roll, of a steam pipe placed parallel with the
said roll but external thereto.
5. The combination, with a dandy roll, of a steam pipe and its adjuncts substan-
tially as described with reference to the accompanying drawings.
6. The combination, with a dandy roll, of a felt or like covered roller substanti-
ally as set forth.
7. The combination, with a dandy roll, of a felt or like covered roller, a rotary
brush in contact therewith, and a trough to receive the impurities brushed from
the said roller substantially as set forth.
8. The combination, with a dandy roll, of a steam pipe, a felt or like covered
roller, a rotary brush in contact therewith, and a trough to receive the impurities
brushed from the said roller substantially as set forth.
9. The combination, with the vertical sleeve such as e of a dandy roll carriage,
of an adjustable bracket serving to carry either a steam pipe or an absorbent
roller and rotary brush substantially as set forth.
10. The improved balanced dandy roll carriage and its adjuncts substantially
as described and illustrated in the accompanying drawings.
Dated this 16th day of December 1899.
T. ALLEN MARSHALL.
C. DUDLEY MARSHALL.