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Патент USA US3035646

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May 22, 1962
T. J. PESCATELLO
3,035,636
PAPER BOARD MACHINES
Filed Feb. 14, 1957
‘915.lbL5w, .
///
INVENTOR
5%;46 £44m
United States Patent 0
3,035,636
Patented May 22, 1962
1
2
3,035,636
In the drawing, there is indicated at 10 a vat of con
ventional structure except as otherwise indicated, and
PAPER BOARD MACHINES
having a generally semi-cylindrical form. The cylinder
Tufanio John Pescatello, New London, Conn., assignor
11 rotates within this vat in the direction of the arrow
12, has a surface of ?ne wire mesh, over coarse wire,
to Robertson Paper Box Company Incorporated, Mont
vllle, Conn., a corporation of Connecticut
Filed Feb. 14, 1957, Ser. No. 640,145
6 Claims. (Cl. 162-—327)
usually supported on small rods, is supported and ro
tated by means of a shaft 13 and is provided with a
water discharge pipe 14 connected to the interior of
the cylinder through an end plate structure 15 against
This invention relates to paperboard machines and
more partciularly to the wet end of such machines uti 10 which the end of the cylinder abuts and to which a
reasonable seal is made by conventional means,
lizing a cylinder mold vat in which the ?ber is deposited
The vat 10 is generally concentric with the cylinder
on 2 cylinder rotating in a vat suitably supplied with
but the space between it and the cylinder may be varied
stoc .
as desired, on different machines. The vat is kept ?lled
The general object of the invention is to provide im
provements in a cylinder mold and vat capable of pro 15 with stock 17 to some such level as indicated. In the
vat shown, the stock is supplied to the vat adjacent the
ducing an improved board without sacri?cing produc
point where the cylinder emerges from the stock 17 with
tion of board, and or producing a board of equal or
in the vat circle, so that the operation is of the counter
improved quality at increased speed. It has been found
?ow type. In its broader aspect, the invention is ap
possible to obtain an improved uniformity of surface
plicable to uni?ow vats also. The stock is supplied from
for printing, improved quality for cutting and creasing,
accomplishing a saving in white liner, increased produc
a body 19 within a vat 20 which in this example con
tion of regular board and specialties and a lower cost
formula on specialties and regular board of an increased
strength. In general, the deposition of the stock on the
cylinder may take place in a much more uniform manner
across the machine and in machine direction and there
is also obtained a much improved distribution or orienta
tion of ?bers, making for a more compact smoother,
stronger and better formed board without change in the
stock with which the vat is supplied.
In previous board making machines, both counter
?ow and uni?ow principles have been employed, and the
stock has been introduced into the cylinder vat in a
tains one or more baffles 21 over and under which the
variety of manners. Essentially, however, in previously
used equipment and methods of operating it, it is ac~
cepted theory that nearly all the formation takes place
in the ?rst 90° of cylinder rotation, where the ?ber ?rst
and fastened thereto by heads 26 of the screws 23 is a
U-shaped plate structure 27 which ?ts over a wall 28
of the vat and may he slid up and down thereon to
stock ?ows, however, other suitable baf?ing systems may
be used also. The stock emerges from the vat by over
?owing the edge of a making board 22, the design and
arrangement of which constitutes an important feature
of the present invention.
As shown in FIG. 2, the making board 22 is gener
ally horizontal or may be varied and is supported by
a pair of vertical adjusting screws 23, which, in turn,
are supported in an upper frame member 24 within ro
tatable nuts 25, by turning which the board 22 may be
located in a desired vertical position. Below board 22
vary the e?ective height of this wall as the height of
the board 22 is adjusted. Screws 23 pass through slots
contacts the cylinder and that during the remainder of
29 in the board 22 and carry lock nuts 30 for secur
the cylinder rotation in the vat, the formed stock is more
or less dragged through the solution. The board pro 40 ing the board in desired horizontal position with refer
ence to the U-frame 27 and the screws 23. By loosen
duced therefore generally shows a de?nite tendency to
ing the lock nuts 30, the board may be adjusted hori
ward parallelism of orientation of the ?bers and streaki
zontally toward and away from the cylinder mold 11
ness in the direction of movement of the cylinder, which
and then again ?xed in position by retightening the
type of orientation bears out the theory just mentioned,
lock nuts 39. A horizontal adjustment of several inches
and also tends to produce an over all streaking, un
with a mold board approximately three to eight inches
evenness, and weakening of the board. The incoming
wide may thus be provided without difficulty, and a
?ow of stock in a conventional vat further aggravates
horizontal adjustment of several inches has been found
this unevenness of formation. In the machine and meth
advisable for various purposes. The back end of mem
od of the present invention, the introduction of stock
ber 22 is preferably rounded as indicated at 31 and
to the mold is accurately controlled with relation to
the front or discharge end is preferably beveled at 45°
the cylinder surface as it emerges from the body of stock
within the vat and in such a manner as to produce a
very desirable orientation of ?bers and a much more uni
or thereabouts, as indicated at 32, and has sharp or
slightly rounded edge 33. The inner plate of the \U-shaped
member 27 carries an adjustable wing baffle plate 34
form, dense and smooth formation, and with much less
55 mounted on the U-shaped member 27 by means of a
streaks.
hinge 35 and having means to hold the wing in adjusted
A machine and method embodying the invention in
a preferred form will now ?rst be described with ref
erence to the accompanying drawing and the features
forming the invention will then be pointed out in the
appended claims.
In the drawing:
position.
In a typical operation, the member 22 is set to a posi
tion about as indicated in the ‘drawing, and in which the
60 edge 33 may be in a plane through the cylinder axis at
about 30° to the horizontal more or less and may be
FIG. 1 is a schematic cross section of a cylinder mold
spaced from the cylinder by about one to four inches,
orientation in a board made in a conventional machine
to some extent, with part of it ?owing in a retrograde
more or less as shown. The flow of stock over the edge
and vat embodying the invention in a preferred form;
33 follows substantially a course indicated in the central
FIG. 2 is an enlarged section showing an adjustable
making board and also illustrating the ?ow conditions 65 part of the stream, contacting the ?bers already on the
cylinder mold in point A and, by reason of velocity of
obtaining adjacent the board;
the stock at this point, against the wire and downward
FIG. 3 is an enlarged schematic showing the ?ber
direction to point B, at which point downward velocity
FIG. 4 is a view similar to FIG. 3, showing a board 70 of the stock entering the vat and ?owing against the
cylinder is relatively killed. The e?ect of disturbance
made with the machine and method of the present inven
by conventional methods; and
tion, but from the same stock.
of the original orientation of ?bers may continue to a'
3,035,636
3
A
diminishing extent and to a lower point, such as the
tain a greater hydraulic head without streaks, skipping,
etc., than in conventional cylinder mold arrangements,
point C. By reason of the impingement of the stock
against the cylinder, at a point where the web has been
largely laid down, the amount of water flow through the
cylinder mold ‘from this impinging stock is greater than
in conventional molds, and also the e?ect is to agitate
and dilute and redistribute the surface ?bers already laid
on the cylinder, mixing the outer portion thereof with
and this greater head permits use of more water into the
vat which also improves formation and output.
This invention also permits the operator to control the
level of the solution adjacent to the making board or pond
for more uniform operation. It also permits operator to
speed up the velocity of water over the outer edge 33 of
the making board to control the action in the pond and to
the outer part of the board, a more dilute and disturbed 10 increase the total water used for changes in speed of the
mass, from which water is then lost partly through the
machine.
Wet sheet radially inward and partly to the outer liquid
The battle 34 ‘attached to the making board structure
area of the mass. As will be apparent, a condition in
and moveable therewith, permits a control of the flow of
which a substantial part of the board is ?nally laid down
stock upwardly to the making board 22, along a path gen
in the last half of the rotation ‘of the cylinder 11 in the 15 erally indicated by arrow at X. The angle of the ba?le
vat 19 is created rather than the ?rst half or 90° and also
34 may be adjusted for the best flow over the making
the disturbance and agitation produce a much more uni
board 22, and the flow conditions above the outer end of
form surface structure and also a structure in which the
this ba?ie and from thereon up to the edge *of the board
?bers are ‘orientated in a much more heterogeneous fash
22 will remain substantially unaltered as the height of the
ion, and with less streaks in the ?nished results. This 20 board is adjusted, since this adjustment does not disturb
greater deposition of ?ber on the mold in the last half of
the relationship between board 22 and baffle 34. The
the mold rotation in the solution or diluted stock, tends
horizontal adjustment of board 22 leaves the baffle 34 in
to starve the ?rst half of rotation of stock and which is
unaltered position relative to the vertical adjacent baf?e
very evident when this invention is used.
21. Where, however, the horizontal adjustment makes a
In FIGS. 3 and 4, there are shown schematically and
change in the typical flow path X desirable, this is readily
to an enlargement of about ten diameters, typical areas of
accomplished by moving the ba?le 34 about its hinge 35.
board made with conventional method and process (FIG.
What is claimed is:
3) and board made with the present method and ma
1. A paper board machine comprising a cylinder mold,
chine. These ?gures have been prepared from samples
means for rotating the mold, a stock vat having a vat
in which a small quantity of colored ?bers are incorpo
circle in which the mold rotates, a ?ow system for supply
rated in the stock, making it easy to observe the orienta
ing stock to the vat, a making board positioned at the
tion. It will be noted that in the conventional board,
upper edge of the vat circle adjacent the mold where it
the ?bers are orientated predominantly in the direction
emerges ?-om the vat circle, and means mounting the said
X—-X and in most cases relatively straight and subject to
board on the edge of the vat circle and for adjusting the
the impinging fresh stock and temporarily producing in
streaking while in the board of FIG. 4, the straight orienta 35 position thereof horizontally, the How system comprising
tion has been disturbed and a major part of the ?bers
means for supplying the stock to the vat circle over the
have also been crossed and curled or bent, as in the case
said making board and removing water from the interior
of the ?ber indicated at F.
of the mold, whereby the direction of stock ?ow within
In a board machine of this general type, an inherent
the vat circle opposite to the direction of rotation of the
balance ‘of conditions exists, as determined by the speed 40 cylinder mold is maintained.
of rotation of the cylinder, porosity of the wire surface,
2. A paper board machine comprising a cylinder mold,
the rate of supply and extent of dilution of stock, the vat
means for rotating the mold, a stock vat having a vat
dimensions, and the water level within the cylinder, all
circle in which the mold rotates, .a flow system for supply
of which conditions must be so related that a given rate
ing stock to the vat, a making board positioned at the
of deposition of ?bers on the cylinder is obtained in order 45 upper edge of the vat circle adjacent the mold where it
that board of the required thickness and characteristics
emerges from the vat circle, and means mounting the said
may be produced. In a conventional vat there is thus
board on the edge of the vat circle and for adjusting the
little or no opportunity to control in any effective manner
position thereof horizontally and vertically, the ?ow sys
the rate of laying down of ?bers as a function of angular
tem comprising means for supplying the stock to the vat
position .of any given area of the cylinder or the orienta 50 circle over the said making board and ‘removing Water
tion of ?bers. With given speed of rotation of the cylin
from the interior of the mold, whereby the direction of
stock ?ow within the vat circle opposite to the direction
of rotation of the cylinder mold is maintained.
making board arrangement of the present invention, it is
3. A paper board machine comprising a cylinder mold,
possible to control the rate of supply of stock as previous 55 means for rotating the mold, a stock vat having a vat
ly, and in addition by adjustment (principally the hori
circle in which the mold rotates, a ?ow system for supply
zontal adjustment) of the board 22 to regulate the
ing stock to the vat, at making board, a vertically slidable
velocity and points at which the entering stock impinges
member positioned at the upper edge of the vat circle ad~
upon the cylinder, or by combining the vertical and hori
jacent the mold where it emerges from the vat circle for
zontal adjustment of the board to regulate this velocity 60 regulating the height of the said upper edge, and means
(without changing the rate of supply of stock in terms of
mounting the‘said board on the said vertically slidable
gallons per minute), while maintaining a ?xed line of im
member for adjusting the position of the board horizon
der and concentration of stock, the rate of supply must
equal the rate of deposition or laying down. With the
pingement of stock against cylinder, or adjusting the posi
tally, the ?ow system comprising means for supplying the
tion of this line of impingement for best e?ect.
stock to the vat circle over the said making board and re
The striking of the fresh stock against the already laid 65 moving water from the interior of the mold, whereby the
down ?ber mass at a point where moisture therefrom has
direction of stock flow within the vat circle opposite to the
been largely drained into the cylinder, also causes ab
direction of rotation of the cylinder mold is maintained.
sorption of water from the fresh stock of ?bers into the
4. A paper board machine comprising a cylinder mold,
already laid down partially formed web and discharge of
means for rotating the mold, a stock vat having a vat cir
this water into the cylinder, producing a radial compact 70 cle in which the mold rotates, a ?ow system for supplying
ing effect along with an interlacing of ?bers or an orienta
stock to the vat, a making board, a vertically slidable
tion thereof at an angle to the plane of the sheet, pro
plate positioned at the upper edge of the vat circle ad
ducing again a very much improved surface structure.
jacent the mold where it emerges from the vat circle for
When this invention is used it is then possible to lower
regulating the height of the said upper edge, a making
the level of white water inside the cylinder mold and ob 75 board at the top of the said vertically slidable member, a
i
i
3,085,636
baf?e plate attached to the said slidable plate inside the
vat and below the making board, and a vertical ha?ie in
the vat determining a path for upward flow of stock past
the said ba?ie plate and over the making board, the
flow system comprising means for supplying the stock to
the stock vat ahead of the said baffle for ?ow past the
same and over the making board into the vat circle and
means for removing water from the interior of the mold
for maintaining a ?ow of stock in a direction opposite
to that of the mold rotation.
5. A paper hoard machine comprising a cylinder mold,
means for rotating the mold, a stock vat having a vat cir
cle in which the mold rotates, a ?ow system for supply
ing stock to the vat, a making board, a vertically slidable
plate positioned at the upper edge of the vat circle ad 15
jacent the mold where it emerges from the vat circle for
6
plate positioned at the upper edge of the vat circle ad
jacent the mold where it emerges from the vat circle for
regulating the height of the said upper edge, a making
board at the top of the said vertically sliadble member, a
‘ba?ie plate hingedly attached to the said slidable plate in
side the vat and below the making board, and a vertical
ba?ie in the vat determining a path for upward ?ow of
stock past the said ba?ie plate and over the making
board, the ?ow system comprising means for supplying
the stock to the stock Vat ahead of the said ba?ie for ?ow
past the same and over the making board into the vat
circle and means for removing water from the interior
of the mold for maintaining a ?ow of stock in a direction
opposite to that of the mold rotation.
References Cited in the ?le of this patent
UNITED STATES PATENTS
regulating the height of the said upper edge, a making
board at the top of the said vertically slidable member, a
1,957,824
Fieberts ______________ .._ May 8, 1934
bafde plate, means adjustably attaching the ba?ie plate
2,171,739
Berry _______________ __ Sept. 5, 1939
to the said slidable plate inside the vat and below the 20 2,243,773
Randell _____________ .._ May 27, 1941
making board, and a vertical baf?e in the vat determining
2,249,128
Goldsmith ___________ __ July 15, 1941
a path for upward ?ow of stock past the said ba?ile plate
2,275,776
Lane et a1 ____________ __ Mar. 10, 1942
and over the making board, the ?ow system compris
2,589,638
taege ______________ __ Mar. 18, 1952
ing means for supplying the stock to the stock vat ahead
FOREIGN PATENTS
of the said bailie for ?ow past the same and over the 25
making board into the vat circle and means for removing
Water from the interior of the mold for maintaining a
?ow of stock in a direction opposite to that of the mold
rotation.
6. A paper board machine comprising a cylinder mold,
means for rotating the mold, a stock vat having a vat
circle in which the mold rotates, a ?ow system for supply
ing stock to the vat, a making board, a vertically slidable
506,844
Great Britain __________ .._ June 6, 1939
OTHER REFERENCES
Cook: Cylinder Machines from Paper Trade Journal,
Feb. 8, 1952, pp. 21, 22, 24 and 26.
Goldsmith:
Cylinder Machine Formation,
TAPPI, Series XXI, pp. 125-134, June 1938.
from
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