Year: 1886

page_text: I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex, 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 construction of rolls or
cylinders of wire for the purpose of pressing out the water from the pulp in the
process of making paper, the object being to increase the stiffness and strength of
the said rolls or cylinders so that when used, for example in making the water
mark in the paper, the surface will remain uniform to engage evenly the paper and
thus secure a perfect mark; and furthermore to prevent the frothy mass, which
ordinarily works through the meshes of the wire covering from the imperfectly
formed paper upon which said roll is working, from bardening and thus clogging
the meshes so that the functions of the roll are materially interfered with, the
cleansing of the roll often made necessary and the manufacture of the paper greatly
retarded.
The invention consists in the improved dandy-roll having the arrangements and
combinations of parts substantially as will be hereinafter set forth and finally
embodied in the clauses of the claim.
Referring to the accompanying drawings in which like letters indicate corre-
sponding parts in each of the several figures. Fig. 1, is an elevation of a portion of
the improved machine parts being broken away to illustrate, their construction
more effectually: Fig. 2, is a sectional view taken through line a, Fig. 3, is a face
view of a bearing for the pipe which extends through the roll and supplies the
interior thereof with water, a section being taken through line y, Fig. 1; Fig. 4, is
a section on line 2, through said pipe to show a face view of a certain collar by
means of which the dandy is prevented from moving longitudinally on the shaft or
pipe; Fig. 5, illustrates the construction of said shaft and roll, showing certain
modifications in the construction thereof which will be duly explained; Fig. 6,
is an enlarged view of a portion of the shaft or pipe, showing certain perforation's
D
4+

page_text: therein; Fig. 7, is a detail perspective view of a portion of the said roll showing
more perfectly the peculiar formation of the wires therein and their relations to one
another, and Fig. 8, is a detail showing a portion of said roll having the winding
and frame-wires in a varied relation from that shown in Fig. 1.
In said drawing a, indicates the dandy-roll, which is of any ordinary construction
but is preferably provided with a peculiar arrangement and kind or construction of
wires which will be hereinafter particularly specified. Said roll is carried by a
fixed shaft or pipe b, which is connected with a supply-pipe d, and extends longi-
tudinally through the roll, being preferably square or quadrangular when viewed
in cross-section and provided with a series of perforations 6, by which the water is
evenly distributed along the interior of the roll. I prefer to form the perforations
marked b¹, 6', in Fig. 6, at the underside of the shaft or pipe, for, by that means, the
water or spray falls only on the roll as it (said roll) engages the paper on the wire-
cloth or belt upon which the roll revolves, the water being thus prevented from
being forced through the meshes of the roll-covering in drops, which falling on the
soft paper, would be liable to spot the same and thus impair its value.
The water flowing from the pipe or shaft to the interior side of the roll, prevents
"the frothy matter, which works through the wire-covering, from hardening and thus
clogging said covering.
'
The flow of water to the spray-pipe or shaft, b, is, or may be, regulated or con-
trolled by a suitable valve n, Fig. 1, which may be of any desirable construction.
To relieve the paper from an excess of weight which would tend to "crush" it,
I have formed, or may form, the shaft b, quadrangular, as indicated in Fig's. 2, 3,
and 4, though it may be of other shapes, and on the said shaft have arranged a
slotted journal block or.bearing c, upon which the dandy-roll may revolve under
the influence of the paper f, and wire cloth or belt g, with which the roll engages
in the usual way.
The slot in said bearing may be provided with springs, as the ones shown in
Fig. 5, to prevent undue freedom or looseness of motion.
By this construction it will be evident that the said wire-cloth and paper thereon
do not sustain the weight of the shaft b, and the water therein, but only the roll
which is free to adjust itself to the cloth, and it thus bears evenly thereon so that
a more perfect impression is secured throughout the length of the paper."
By means of the adjustable collars or stops e, e, the dandy-roll may be moved
laterally in either direction on the shaft and be then secured in place in accordance
with the position of the wire cloth thereunder.
Of course, departures or modifications in the arrangements and constructions of the
spray-pipe, and of the mechanism whereby the roll may automatically adjust itself
to the paper may be made as for example, the slot may be transferred to some other
part, and the spray-pipe or shaft may be round in section.
In constructing the frame of the roll, I first form a cylindrical frame-work of
spiral wire a', which is hollow or A-shaped in cross-section.
Over this are secured preferably by solder, longitudinal wires b', of. the same
shape, the outer edges of the spirals being preferably notched or indented to
received the spreading edges of the hollow longitudinal wires.
Said longitudinal wires are likewise indented to receive a binding or winding
wire or wires c³, and hold it or them at suitable distances to allow a free passage of
water therebetween.
"
Said winding-wires c³, are preferably flat or oblong in cross-section substantially
as shown in Fig. 7, and are placed edge-wise in the notches to allow a free passage
of the water and yet secure an increased amount of stiffness and strength in
the roll.
Over the winding wires is stretched a cloth d³, in the usual manner, which
completes the roll-body.
The peculiar shape of the wires a³, 6, and c³, give such added strength to the
roll as to keep the same rigid at at all points on the periphery without obstructing
the passage of the water therethrough.

page_text: It will be observed upon inspection of Fig. 1 that the spirals a*, c², are formed
and disposed in the roll at varying pitches so that when fastened rigidly to the
bars or wires b' they form or tend to form angles with one another so that greater
strength is, given to the roll. By separating said spiral wires by the said
longitudinal bars or wires b, fewer angles are formed than there would be were
they brought together on the same side of said longitudinal wires, consequently
the opportunity for clogging is reduced as compared to said latter construction.
I do not limit myself however to any peculiar form of wires or to any specified
arrangements of the 'same as changes may be made in these respects without
departing from other features of the invention, as for example, the binding wires
and frame wires, instead of pitching in the same direction as in Fig. 1, may pitch
in opposite directions as in Fig. 8, and this latter construction I prefer for by it
added strength and stiffness is attained, as will be evident.
Again, instead of forming the binding wires and frame wires into continuous
spirals as shown they may be formed in rings separate from one another and be
Boldered to the longitudinal wires so as to be firmly secured in place.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated to
me by my foreign Correspondent I declare that what I claim is :-
1. A dandy-roll for use in paper-making, having a water supply pipe leading
into the interior thereof, substantially as and for the purposes set forth.
2. The dandy-roll for paper-making having a spray-pipe by means of which the
interior of said roll may be supplied with liquid, substantially as and for the
purposes set forth.
3. In combination, a dandy-roll, perforated supply or spray-pipe, bearings for
said roll and a valve n, substantially as and for the purposes set forth.
4. In combination with a dandy-roll, a pipe b, having perforations on the under
side only, substantially as and for the purposes set forth.
5. The combination of the dandy-roll and a shaft to supply water to said roll,
said roll having a vertically movable relation to said shaft substantially as set
forth.
6. In combination the tubular and perforated shaft, and dandy-roll having a
movement on said shaft in a direction at angles thereto substantially as described.
7. In combination with a dandy-roll a perforated shaft and slotted journal, said
parts being arranged and adapted to operate substantially as and for the purposes
set forth.
8. The combination with the fixed quadrangular shaft, a slotted journal-bearing
and dandy-roll, said parts being arranged and adapted to operate substantially as
and for the purposes set forth.
9. In combination with a fixed perforated pipe connected with a suitable supply
pipe, having a valve to control the flow of water therethrough, the perforations
being on the underside of said pipe only, a dandy-roll and a slotted journal bearing
said parts being arranged and adapted to operate, substantially as and for the
purposes set forth.
10. The improved roll for paper-making, the same consisting of a frame-work
formed of hollow or A-shaped wires a³, b³, wound wires c³, and wire-cloth d³ all
arranged and combined substantially as and for the purposes set forth.
11. The combination in a dandy-roll for use in paper-making the A-shaped and
notched or indented wires a³, arranged cylindrically, the notched and V-shaped
longitudinal wires 6, the winding wires and winding cloth, all arranged and
adapted to operate substantially as set forth.
12. A dandy-roll, having A-shaped or hollow wires in the frame-work thereof
substantially as set fort
13. In a dandy roll, th., winding wires c oblong in cross-section and set edge-
wise on the frame, substantially as set forth.

page_text: 14. In a roll for use in paper making, the hollow or V-shaped cylindrical frame
having longitudinal wires 6 thereon and winding wires oblong in cross-section
arranged edge-wise thereover, said parts being arranged and combined substantially
as set forth and shown.
15. In a dandy-roll, two sets of spiral wires arranged therein at varying pitches,
substantially as set forth for the purposes specified.
16. In a dandy-roll, two sets of spiral wires arranged at varying pitches and
separated by longitudinal wires, substantially as and for the purposes set forth.
17. In a dandy-roll, sets of V-shaped spirals arranged at varying pitches on
opposite sides of longitudinal wires, said parts being arranged and combined
substantially as and for the purposes set forth.
18. In a dandy-roll, winding wires and frame wires arranged on opposite sides
of longitudinal wires and at opposite pitches, substantially as and for the purposes
set forth.