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Патент USA US3039494

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June 19, 1962
J. M. DEERING
3,039,483
WEB CONTROL SENSING NOZZLE
Filed Feb. 25, 1960
2 Sheets-Sheet 1
INVENTOR.
zfosep/z Mjeerz‘z?
BY
June 19, 1962
J. M. DEERING
3,039,483
was CONTROL SENSING NOZZLE
Filed Feb. 25, 1960’
2
2 Sheets-Sheet 2
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Unite States
1
3,039,483
WEB CONTROL SENSING NOZZLE
Joseph M. Deer-ing, Chicago, Ill., assignor to GPE Con
trols, Inc., Chicago, Ill., a corporation of Illinois
Filed Feb. 23, 1960, Ser. No. 10,222
6 Claims. (Cl. 137-83)
This invention relates to the art of web control and
more particularly to a sensing nozzle for use in a web
iC€
3,039,433
Patented June 19, 1962
2
tel-mined path, such as a straight line. The purpose of
the web control system of the invention is to accomplish
this objective, and toward this end includes a pair of web
edge sensing nozzle assemblies 18, 20, a hydraulic con
troller 22, and a roll position control assembly 24.
The nozzle assemblies 18, 20, which are identical in
structure but different in location relative to the web 10,
are formed to provide a C-shaped or yoke-line con?gura
tion between the jaws of which the web 10 is arranged to
10 travel, said nozzle assemblies each being oppositely dis
control system.
posed along the respective edges of the web. A supply
Many types of systems have been proposed and utilized
of pressure ?uid, such as compressed air, is fed to the
for the purpose of web guiding, that is, controlling the
nozzle assemblies 18, 20 by way of a supply pipe 26 and
?ight of a web, or sheet of material as it moves from one
connecting branch pipes 28, 30, each of the latter hav
roll to another. The system of the present invention is
ing a standard type air ?lter 32 and a pressure regulator
15
of the type wherein a pneumatic jet stream is positioned
34, as shown.
at an edge of the web, which stream is normal to the
The purpose of the sensing nozzles 18, 20, is to develop
surface of the web, and is arranged to be interrupted by
a
pressure
signal indicative of the lateral position of the
lateral movement of the web, thus generating a signal
moving web 10 as it travels past the nozzles, which signal
which is transmitted to apparatus adapted to realign the
flight of the web within predetermied tolerances. More 20 is transmitted to the controller 22. Variation of the
pressure signal from a predetermined norm, caused by
speci?cally, the system of the present invention utilizes
shift in lateral position of the web, initiates controller op
pneumatic slotted edge-sensing nozzles capable of main
eration whereby the roll position control assembly 24 is
taining the longitudinal centerline of a moving web with
activated to cause readjustment of lateral position of the
in a given path, even though the web width varies as
25 moving web, so that the web will travel in the desired
much as :3” to 4" per edge.
path. As long as the web is traveling in a predetermined
While prior art web control systems may have utilized
slotted nozzles, di?iculties were experienced with such
nozzles because of non-uniform ?ow pressure conditions
in the nozzle jet stream, caused primarily by air ?ow
turbulence within the nozzle cavity. The nozzle of the
present invention, due to its unique structure and manner
path, for example, the centerline running straight, the
pressure signal will remain at the norm and no corrective
action of the control assembly 24 will be initiated.
Each nozzle assembly 18, 20, as best seen in FIGS. 2-4,
includes a lower jaw, or nozzle block 36, an upper jaw,
or nozzle block 38, and a support block 40 to which the
nozzle blocks are af?xed in parallel spaced relation by
of handling internal air ?ow, avoids the shortcomings of
slotted edge-sensing nozzles of the prior art, and operates
means, such as screws 42. An elongated, or slot-like
to provide uniform pressure in the nozzle jet stream, thus
making practical, centerline control of webs having as 35 cavity 44 is formed in the lower block 36, while longi-'
tudinally extending passageways 46 are provided at each
much as :3" to 4” variation per edge.
The main object of this invention is to provide a web
control system for maintaining the centerline of a moving
web within a predetermined path.
A more speci?c object is to provide a web control sys
tem for maintaining the centerline of a moving web with
in a predetermined path even though the width of the
web varies an appreciable amount.
Still another object of the invention is to provide slotted 45
nozzles for use in a web control system, which nozzles
develop uniform pressure in the nozzle jet stream so that
practical centerline control of moving webs can be had
even when the web width varies 13” to 4" per edge.
These and further objects and features of the subject
invention will become more apparent from the following
description and accompanying drawings wherein:
‘FIG. 1 is a schematic view illustrating a web control
system embodying the principles of the invention;
end of the cavity as shown for receiving the ends of con
duit, or piping 48, which lead from supply branch pipes
28 or 30. Attention is directed to the fact that the con
?guration and length of piping 48, extending in branch
fashion from supply pipes 28 or 30, is similar, viz. dis
tances A=A. A recess 50 formed in the top surface of
nozzle block 36 is arranged to receive a nozzle plate 52,
which is held in positon by fastening means such as screws
54. The plate 52 has a long, narrow slot 56 adapted to
coincide with the longitudinal center line of cavity 44
when the plate is secured in position on the block 36. The
upper nozzle block 38 is similar in construction to block
36, and includes an elongated, or slot-like cavity 58, with
a longitudinally extending passageway 60 at one end for
receiving the end of a conduit, or pipe 62 or 64, lead
ing to the controller 22, as well as a nozzle plate 64
secured by screws 54- within a recess 66 formed in the sur
face of the block 38. The nozzle plate 64 has a long,
FIG. 2 is an elevation view of a nozzle assembly used 55
narrow slot 68 which, is arranged to lie within the same
in the web control system illustrated in FIG. 1 ;
vertical plane as that of nozzle plate slot 56. In view
FIG. 3 is a view generally as seen from line 3——3 in
of such construction, a curtain, or sheet of pressurized
H6. 2; and
air will be maintained invthe jaws of the yoke provided by
FIG. 4 is a view similar to that of FIG. 3, but with a
nozzle plate removed.
the parallel arranged nozzle blocks 36, 38, when com
60 pressed air is fed into the lower block 36 via conduit 48.
Referring now to the drawings, and more particularly
The degree of recovery pressure caused by passage of
to FlG. 1, the numeral 10 identi?es a web, or sheet of
said curtain into the upper block 38 by way of the slot
material being unwound from an inventory roll 12 and
64, will be determined primarily by the amount by which
moving in a path including passage beneath a first idler
the edge of the web of material 10 intercepts said cur
roll 14 and above a second idler roll 16, and onward to 65 tain as it moves through the jaws of the nozzle. Change
one or more rolls (not shown) as required in some type
in lateral movement of the web of material, causes change
of operation, or processing as the case may be. While
of recovery pressure, thus generating a pressure signal
the web 10 is shown as being unwound from the roll 12,
which is transmitted to the controller 22. An extension
it may be desired to reverse web travel in a given opera
tion, that is, to wind the web on the roll 12. In either 70 or arm 70 of the support block 40‘ is provided for se
direction of web travel, the important objective is to main
tain the longitudinal centerline of the web in a prede
curing the nozzle assembly in ?xed position at the edge
of the web of material, by holding means (not shown).
3
8,089,483
A
new position of the jet pipe, liquid pressure in pipe 100
It is important to note that the symmetrical arrangement
of the conduit 48 as it conducts pressurized air into the
nozzle block 36 in a straight and smooth manner, results,
in development of a jet stream within the jaws of the
will decrease while pressure in pipe 93 will increase thus
creating a pressure differential upon control assembly pis
ton iii-4 so that the latter will move toward the right, and
cause movement of the inventory roll 12 toward the right.
nozzle assembly yoke, that is of uniform pressure through
out the length of the jet stream. This results in produc
Movement of the roll to the right will laterally reposition
tion of a pressure signal within the upper nozzle block
the web 10‘ so that it will move toward nozzle assembly
38, that is dependent primarily upon actual jet stream
18 and away from nozzle assembly 29‘. Such lateral
recovery, hence, providing a pressure signal that bears
movement of web 10 will continue until the edges thereof
an accurate relationship to the degree in which the edge 10 intercept equal amounts of the respective nozzle jet sheets,
of the Web intercepts the jet stream. When such pressure
whereupon the recovery pressure will again transmit equal
signal is transmitted to the controller 22, the latter func
pressure signals to the diaphragm assembly 82, resulting
tions to control the lateral position of the web of material
in counter-clockwise movement of jet pipe 72 until the
in a manner which will now be described.
free end thereof is equidistant from the ori?ces of receiver
Controller 22 includes a jet pipe 72 pivotably mounted
passageways 74, 76, at which point the system will again
at one end and adapted for receipt of hydraulic fluid for
ejection in a jet stream at the other end, a jet stream
receiver including receiver ori?ces and associated passage
ways 74, 76, a distributing cylinder '78 having a valving
piston 80 slidably arranged therein, a pressure differential
unit in the form of a diaphragm assembly 82 including
be in equilibrium.
Should the Web 10 move laterally toward the nozzle
assembly 18 and away from nozzle assembly 29, it will be
seen that the system of the invention will automatically
‘operate to cause corrective lateral movement of the web
back toward initial, or predetermined position. In such
manner, the system of the invention quickly takes cor
a diaphragm 84 which is arranged to cause movement of
the jet pipe 72 by means of a rod 86, a setpoint means in
the form of an adjustable coil spring 88, a source of
rective action to assure web travel in a predetermined
path. By making the nozzle slot of great length, large
pressurized hydraulic ?uid including a pump 94}, a pump
driving motor 92, and a reservoir 94, and a solenoid oper
ated valve 96.
variation in web width may be handled. For example, a
nozzle slot length of between 6 to 8 inches, provided
accurate web alignment control when the web width
varied ‘between 3 to 4 inches per edge. Without the
unique structural features and arrangement of the nozzle
of the invention, such excessive web width variation would
make accurate web control difficult, if not impossible.
When the controller 22 is in operation, the valve 96
will direct hydraulic pressure ?uid from the pump 9% to
the distributing cylinder 78 so that the valving piston Si}
is moved to the position shown (FIG. 1). In such posi
tion, an open hydraulic ?uid ?ow path will be provided
from the passageways 74,76, through the cylinder 78,
and into either conduits, or pipes 98, N0 leading to op
The foregoing description has been given in detail with
out thought of limitation since the inventive principles
involved are capable of assuming other forms without
departing ‘from the spirit of the invention or the scope
of the following claims.
What is claimed is:
sure differential caused by unequal fluid pressure on either
l. A web edge sensing nozzle generally of C shape hav
side thereof by reason of ?uid ?ow from pipes 98 and
100, to cause lateral movement of the inventory roll 12. 40 ing a pressure jaw and a recovery jaw, each of said jaws
being formed to provide an elongated cavity having a
The signal pressure pipes 62 and 64 lead to chambers in
length at least twice its greatest cross-sectional dimension,
the diaphragm assembly 82 on opposite sides of dia
and first and second conduits connected individually to
phragm 84. A compression spring 106, is arranged in
opposite ends of the elongated cavity of said pressure jaw
the distributing cylinder 78, to cause movement of the
to supply pressurized medium to both ends of said cavity
valving piston 80 so that the ends of receiver passages
of said pressure jaw, thereby to provide a ?ow of said
74 and 76 are blocked when the controller is not in
medium from said pressure jaw to said recovery jaw in a
operation. For such purposes, the solenoid of the valve
sheet having a pressure which is substantially uniform in
96 and the motor 92, may be tied in to the same elec
the direction of said elongated cavities.
trical circuit.
2. A web edge sensing nozzle having a yoke-like con
From the foregoing it will be seen that the system of
?guration with a pressure jaw and a recovery jaw ar
the invention will automatically operate. to maintain the
ranged in the same vertical plane, each of said jaws being
?ight of the web 10‘ in a predetermined path. Assume
formed to provide an elongated cavity with an elongated
that it is desired to maintain the centerline of the web
slot, and ?rst and second separate conduits connected to
equidistant between the nozzle assemblies 18, 20. In such
opposite ends of the slot of said pressure jaw and to a
position of the web, the edges thereof will intercept like
posite ends of a cylinder 162 forming part of the roll
position control assembly 24. A piston 104, slidably ar
ranged within the cylinder 162, is responsive to a pres
portions of the nozzle jet curtain, thus generating equal
' commoni pressure source for supplying pressurized me
pressure signals for transmission to the diaphragm as
sembly 82. If the angular position of the jet pipe 72 has
dium to both ends of the cavity of said pressure jaw.
3. A web edge sensing nozzle having a yoke-like con
been adjusted so that the free end thereof is equidistant
?guration with a low-er and an upper jaw, each of said
laterally toward nozzle assembly 20 and away from noz
zle assembly 18. The recovery pressure in nozzle assem
?guration with a lower and an upper jaw, each of said
mission to diaphragm assembly 82. As a result, the dia
phragm 84 will experience a pressure differential causing
bulging ‘or movement to the right, thus allowing spring 88
to rotate the jet pipe 72 in a clockwise direction. In such 75
slot, said slots ‘being arranged to lie in the same vertical
plane, ?rst and second separate conduits connected to
opposite ends of the cavity of one of the jaws to supply
pressurized medium to both ends of said cavity, and
jaws being formed to provide an elongated cavity, each
from the ori?ces of passageway 74, 76, under such equal
pressure signals, it will be seen that hydraulic flow through 60 jaw having a nozzle plate arranged to enclose the cavity,
each nozzle plate being formed to provide an elongated
the cylinder 78 will be equally divided, so that hydraulic
slot having a length at least ten times its width, said slots
pressure transmittal to roll position control assembly 24
being arranged to lie in the same plane, and means to
will be balanced, i.e., no pressure differential will exist
on piston 104, and the inventory roll 12 Will remain in
supply pressurized medium to both ends of the cavity of
65 one of the jaws.
?xed lateral position.
Assume now that the web 10 begins to drift, or move
4. A web edge sensing nozzle having a yoke-line con
jaws being formed to provide an elongated cavity, each
bly 26 will decrease while that in nozzle assembly 18 will
70 jaw having a nozzle plate arranged to enclose the cavity,
increase, thus generating differing pressure signal trans
each nozzle plate being formed to provide an elongated
3,039,483
5
means to allow egress of recovered medium from the
cavity of the other jaw.
5. A web edge sensing nozzle having a C-shaped con
?guration with a pressure jaw and a recovery jaw, each of
said jaws being formed to provide an elongated cavity
having a length at least twice as great as its greatest cross
sectional dimension, each jaw having a nozzle plate ar
ranged to enclose the cavity thereof, each nozzle plate
being formed to provide an elongated slot, said slots each
6
thereof, each nozzle plate being formed to provide an
elongated slot, said slots being arranged to lie in the
same vertical plane, separate ?rst and second conduit
means arranged at opposite ends of the cavity of one of
the jaws to direct a flow of pressure medium into the
cavity and in the direction of the longitudinal centerline
thereof, said conduit means being symmetrically arranged
and jointly served by a common pressure ?uid supply line,
and a conduit means for egress of recovered medium from
having lengths at least ten times ‘as great as their widths 10 the cavity of the other jaw.
‘and being arranged to face each other, ?rst and second
conduits connected to opposite ends of the cavity of said
References Cited in the ?le of this patent
pressure jaw to simultaneously supply equal quantities of
pressurized medium and at equal rates to both ends of
said cavity of said pressure jaw, and a recovery conduit 15
connected to said recovery jaw to provide egress of recov
ery medium from the cavity of said recovery jaw.
6. A web edge sensing nozzle having a C-shaped con
?guration with a lower and an upper jaw, each of said
jaws being formed to provide an elongated cavity, each 20
jaw having a nozzle plate arranged to enclose the cavity
UNITED STATES PATENTS
2,779,549
Teplitz _______________ .._ Ian. 29, 1957
2,808,067
2,813,535
2,941,572
Ziebolz _______________ __ Oct. 1, 1957
Markey _____________ __ Nov. 19, 1957
Densen et al __________ __ June 21, 1960
201,182
Australia ____________ __ Jan. 17, 1957
FOREIGN PATENTS
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