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Патент USA US3087515

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April 30, 1963
E. A. LAINE
3,087,505
PICKLING APPARATUS
Filed Dec. 15, 1960
2 Sheets-Sheet 2
row
M
NQ
LIvH
INVENTOR
Edward A; Luine
BY
PM a~J
/
ATTORNE:
United States Patent 0 ”
1
3,087,505
Patented Apr. 30, 1963
2
necessity they are subject to more inertia. Thus, during
strip speed changes, slippage occurs between the roll and
the strip thereby marring the surface. This is further
3,087,505
PICKLING APPARATUS
Edward A. Laine, Leechbnrg, Pa., assignor to Allegheny
complicated when the fluid reagent is a molten caustic
bath which acts as a lubricant between the immersion
roll and the material being treated. The apparatus of
Ludlum Steel Corporation, Breckenridge, Pa., a corpo
ration of Pennsylvania
Filed Dec. 15, 1960, Ser. No. 76,034
16 Claims. (Cl. 134—105)
the present invention corrects these faults by providing
a small diameter roll of low inertia which is completely
This invention pertains to apparatus which is useful in
submersed Within the descaling bath.
the treatment of materials in the form of strip and in 10
An object of the present invention is to provide ap
particular to apparatus for use in the descaling of mate
paratus for use in the treatment of material without
rials in a ?uid reagent.
marring the surface of said material.
Heretofore, materials in the ‘form of strip have been
Another object of this invention is to provide an
treated with a ?uid reagent in any number of ways. One
apparatus which will hold the material submersed within
of the most common of the various apparatus utilized 15 a ?uid reagent without marring the surface thereof.
consisted of a tub containing a ?uid reagent, ‘for example,
A more speci?c object of this invention is to provide
an acid pickling bath. Where the ?uid reagent was of
apparatus having a small diameter immersion roll which
a highly reactive or corrosive nature, with respect to either
is completely immersed within a chemical descaling bath
the apparatus used or the material being treated, suit
and which may be quickly changed without stopping the
able precautions had to be observed. The ?uid reagent 20 descaling process.
was usually contained within a tub, and material was
These and other objects of this invention will become
drawn through the tub. This is espectially true where
apparent to one skilled in the art when taken in conjunc
the over-all treatment was of a continuous nature. Illus
tion with the following description and the drawings in
trative of the foregoing is the apparatus used in the caustic
which:
or acid picking of metals and alloys, for example, steel. 25
FIGURE 1 is a drawing illustrating a schematic ar
This apparatus consisted principally of a tub contain
rangement in partial section of the apparatus of the pres
ing the ?uid reagent and means for supporting the mate
ent invention;
FIG. 2 is a view in section taken along the line :II——II
rial, usually in the form of strip, adjacent the ends there
of. Means for immersing the strip within the bath of
of PEG. 1;
the ?uid reagent were also provided. These latter means 30
have usually taken the ‘form of one or more spaced im
FIG. 3 is a View of the sinker unit in partial section;
FIG. 4 is a view in partial section taken along the
line IV—IV of FIG. 3, and
FIG. 5 is a view in partial section of the indexing mech
mersion rolls which were usually of a su?iciently large
diameter to enable the roll shafts and hearings to remain
out of the ‘bath of the ?uid reagent, yet hold the strip
anism.
below the surface of the bath as illustrated for example 35
Referring now to the drawings and FIGS. 1 and 2 in
in U.S. Patent No. 2,862,839. Consequently, a segment
particular, this invention is illustrated by referring to a
of the immersion roll was submersed in the ?uid reagent
tub shown generally at 10 in which the strip material 12
and the remainder was continuously re-exposed to the air.
is to be treated. The tub 10 is formed from a bottom
Where the bath contains a reagent of a molten salt or
member 14, side walls 16 and end walls 18 which are
other strong chemical pickling solutions, for example,
a nitric acid-hydro?uoric acid or a sulfuric acid bath,
40 so disposed as to provide a container for a ?uid reagent
20. As illustrated in FIGS. 1 and 2, the tub 10 may also
that portion of the roll which is exposed to the air is
be provided with a liner 22 formed of a material which
continuously rescaled, and upon rotation about its shaft,
will not react with the ?uid reagent 20 contained within
that portion of the roll is then descaled when it re-enters
the tub 10. The tub 10 may also be provided with a
the bath. This continuous scaling and descaling of the 45 means 24 for controlling the temperature to the bath 20
immersion roll results in scale deposits upon the surface
contained within tub 10. This is most conveniently
of the strip material being descaled or, in the alternative,
accomplished [by means of radiant heater tubes or electric
an uneven descaling on the top surface of the strip being
elements which are disposed externally or internally along
processed.
the side walls 16 and end walls 18, and where desired,
Moreover, when these large diameter rolls are used in 50 adjacent the bottom 14 of the tub 10. The ?uid reagent
descaling certain metals, such as titanium, or metals that
20 can thus be a fused salt bath or an acid bath of the
are farther apart in the electro-chemical series vfrom the
nitric-hydro?uoric acid type or sulfuric acid type. In
material of which the descaling vessel is made, it has
any event, any desirable ?uid reagent may be disposed
been ‘found that an electrolytic action is established 'be
within the tub 10 and maintained at a given temperature
55
tween the strip being descaled and the immersion rolls
range.
with the salt bath being the electrolyte. This action
Preferably, entrance and exit support rolls 26' are
causes minute widely scattered “pimples” to form on the
mounted
adjacent the end walls 18 of the tub 110 and
surface of such a steel immersion roll. Since on a conven
where desired, guide or wiper rolls 28 may be interposed
tional large diameter immersion roll there is a heavier
layer of more electrically insulated scale between the 60 intermediate the entrance and exit support rolls 26 for
supporting, wiping or guiding the strip material 12 into
strip and the immersion roll, these “pimples” at times
and out of the ?uid reagent 20 contained in tub 10. The
pierce this insulation boundary and cause an electrical
strip material 12 is placed or ‘fed over the support rolls
path which preferentially pits or otherwise disrupts the
26 and under the guide or wiper rolls 28 and is held
strip surface. In addition, because these conventional
steel immersion rolls are of such a large diameter, of 65 submersed beneath the surface of the ?uid reagent 20 by
3,087,505
3
4
means of the sinker unit shown ‘generally at 30‘ as more
annular seal 82 is disposed to have a bushing 84 secured
clearly illustrated in FIG. 1.
therein which is of a sufficient diameter to accommodate
The sinker unit 30 as shown in FIG. 2 comprises a
shaft 32, roll supporting end plates 34 carried thereon
the stub shaft 72, thus permitting the free rotational
movement of the roll 36 about the oppositely aligned stub
shafts 72. It is preferred to have the roll 36 of a su?i
eiently small diameter so that when the sinker unit 30 is
rotated into the hold-down position illustrated in FIGS.
1 and 2, by the selective indexing means shown generally
as 86, the immersed roll 36 will remain totally immersed
and at least a pair of spaced small diameter rolls shown
generally at 36, each component of which will be more
fully described hereinafter. The sinker unit 30 may be
conveniently mounted on a pair of upwardly extending
support columns 38 as illustrated in FIG. 2, each of said
support columns being disposed adjacent the side walls 10 Within the ?uid reagent 20 contained ‘within the tub 10.
16 of the tub 10 in an aligned relation in a vertical
It will be appreciated that While the embodiment illus
plane perpendicular to the direction of movement of the
trated in FIG. 1 shows the end plates which will accom
strip 12 through the tub 10, or, if preferred, the sinker
modate 2 rolls, the end plates 34 may take any desired
unit 30 may be mounted on the top rim of the tub 10.
con?guration so as to accommodate any convenient num
A pillow block 40 is conveniently mounted on the upper 15 ber of rolls, for example, 3, 4, 5, 6 and so on without
extremity of each of the upwardly extending support
departing from the spirit or scope of this invention.
columns 38 or tub rim to which the sinker unit 30 may
The selective indexing means 86 as shown more clear
be rotatably secured. Each pillow block 40 comprises a
ly in FIGS. 3 and 5, comprises a worm gear wheel 88
base 42 and an upwardly extending housing ‘44 with a
which is secured to the shaft extension nipple 50 as will
bushing (not shown) contained therein and disposed to 20 be described hereinafter, a worm shaft shown generally
receive one end of the shaft 32 to be rotatably secured
at 90 and a worm shaft bracket shown generally at 92.
therein.
The worm shaft bracket 92 comprises a base member 94,
The support shaft 32 of the sinker unit 30 is provided
an upwardly extending support member 96 and a cap
with bearing surfaces 46 near each end thereof as more
member 98, said cap member 98 preferably being re
clearly illustrated in FIG. 3. Each of the bearing sur 25 movably secured to the upwardly extending support mem
faces 46 of the shaft 32 is disposed to be received by the
ber 96. The base member 94 and the cap member 98
bushing (not shown) in the pillow ‘block 40 and rota
are each provided with a passageway 100 and 102, re
tably secured therein. One end of the shaft 32 of the
spectively, therethrough, in an aligned relation for ro
sinker unit 30 is also provided with a keeper groove 48
tatably securing the worm shaft 90 in seating engage
adjacent the bearing surface 46 and a shaft extension 30 ment therein. The worm shaft 90 comprises a lower
nipple 50, the keeper groove 48 and a shaft extension
shank 104 which is disposed in seating engagement with
nipple 50 being disposed near the outer extremity of one
in the passageway 100, worm threads 106, an upper shank
end of the shaft adjacent the bearing surface 46. A
108 which is disposed in rotatable engagement within
keeper plate 52 is disposed to be seated in the keeper
passageway 102, and a shaft terminal 110 which is dis
groove 48 and is secured by means of bolts (not shown) 35 posed to be coupled with a source of rotatable power
to the pillow block 42 thus rotatably securing the shaft
32 of the sinker unit 30 in an operative position. The
shaft 32 is also provided with a pair of keyways 54
(not shown).
The worm gear wheel 88 is provided with a keyway
112 which complements the keyway 56 of the shaft ex
intermediate the bearing surfaces 46 and a keyway 56
tension nipple 50. A key 114 is interposed within the
in the shaft extension nipple 50, each of which will be 40 complementing keyways 56 and 112 of the shaft exten
explained more fully hereinafter.
sion nipple 50 and, the worm gear wheel 88, respectively,
A pair of roll supporting end plates 34 is disposed to
thus securing the worm gear wheel 88 to the shaft ex
be carried by the shaft 32 intermediate the bearing sur
tension nipple 50. A keeper plate 116 is disposed to be
faces 46 of the sinker unit 30. Each of the roll sup
secured to the end of the shaft extension nipple 50 by
porting end plates 34 comprises a hub 58 and radial web
means
of bolt 118, thus locking key 114 in position with
members 60, saidv hub 58 being provided with a keyway 45 in the complementing keyways 56 and 112.
62 which complements keyway 54. A key 64 is inter
The worm gear wheel 88 is also provided with teeth
posed within the complementing keyways 54 and 62, re
120 which are disposed about the periphery of the wheel
spectively, thus securing the roll supporting end plate
88 and cooperate with the threads 106 of the shaft_90
34 to the shaft 32 for movement with the shaft 32. The
50 in meshing engagement therewith. A source of rotating
hub is also provided with an opening for the insertion of
power (not shown) is disposed to be coupled with the
a set screw or pin 66 to secure the hub 58 to the shaft
shaft terminal 110 to rotate the shaft 90 thus rotating
32. The roll support end plates 34 are provided with an
the wheel 88 to selectively index the sinker unit 30 into
annular collar 68 which is disposed near each of the
its hold-down position.
outer extremities of the roll support end plates 34, said 55
The worm gear wheel 88 is provided with teeth 120
annular collar 68 being secured to the roll support end
which cooperate with and are disposed in meshing en
plate 34 by means of ‘weldment 70. While in the em
gagement with the drive teeth 106 of the worm shaft 90.
bodiment illustrated, the annular collar 68 is welded to
Any suitable source of power may be applied to the shaft
the roll support end plate 34, any means of securing
terminal 110 for providing a rotating force to the worm
the annular collar 68 to the roll support end plate 34
shaft 90 to thus rotate the worm gear wheel 88 to selec
will su?ice, for example, weldment 70 may be supplanted 60 tively index the sinker unit 30 into its hold-down posi
by providing the annular collar with a ?ange, (not
tion.
shown) and by bolting said ?ange to the roll support
In operation, the tub 10 is ?lled to a predetermined
end plate 34. A shaft stub 72 is disposed to be carried
height with the ?uid reagent 20 and is maintained at a
by the annular collar 68 and secured therein by means 65 given preselected temperature by means of the radiant
of a pin 74 as illustrated in FIG. 3, said shaft stub 72
being provided with a bearing surface 76, the function
heater tubes 24 or other means of heat such as electric
elements. The strip material 12 is threaded over the
of which will be described more fully hereinafter.
entrance and exit support rolls 26 and under guide rolls
A pair of spaced roll members 36 is disposed to ex
28 and is maintained submersed within the bath 20 by
tend between the roll support end plates 34 adjacent the 70 means of the sinker unit 30. As the strip passes through
outer extremities thereof, and are rotatably secured there
the bath, it is maintained submerged within the ?uid
to by means of stub shafts 72. Each of the rolls 36
reagent 20 by means of the spaced rolls 36 disposed
comprises a roll body 80 which is preferably hollow
within the reagent turning about the shaft stub 72 which
and is provided with an annular seal 82 adjacent the
is held between roll supporting end plates 34.
opposite ends thereof in any suitable manner. Each 75
In the event of roll failure, for example, as where a
3,087,505
portion of the roll 36 is consumed by the ?uid reagent 20,
or when it is desired to change the roll 36 that has been
immersed for maintenance or inspection purposes, the
sinker unit 30 is rotated, for example, 180° to bring the
roll 36 at the opposite end of the support plates into
engagement with the strip material 12 thus maintaining
the strip 12 below the surface of the ?uid reagent 20
contained within tub 10. This rotation is accomplished
6
over the tub, at least one sinker unit for holding the strip
material below the surface of the reagent contained within
the tub, said singer unit comprising a pair of spaced, up
wardly extending support columns disposed in an aligned
relation adjacent the tub, a support shaft disposed to
extend across the tub and rotatably carried by said
columns, a pair of spaced roll supporting end plates
secured to the rotatable shaft, at least two rolls carried
by means of applying turning power to the worm shaft
by the roll support end plates in spaced relation near the
terminal 110, thus rotating the shaft 90‘ within the bracket 10 outer extremities thereof and disposed to extend there
92 to rotate the worm gear wheel 88 through a predeter
between, said rolls each having a predetermined diameter
mined arc. The rotation of the worm gear wheel v'88
so that one of said rolls is wholly submersed in the re
thus turns the shaft extension nipple 50 and the shaft 32
agent contained in the tub when the roll support end plates
to rotate the roll supporting end plates 34 into the hold
are rotated into operative position to position said one
down position.
Since the roll 36 is of a su?iciently small diameter that
15 roll in a hold-down position, and means secured to at least
one end of the shaft to selectively index the rolls into
it remains totally submersed within the ?uid reagent 20
contained within the tube It}, the roll body 80‘ does not
become exposed to the atmosphere; thus there is no scal
said operative position.
surface.
I claim:
to the rotatable shaft between the pillow blocks, at least
4. In apparatus for the continuous treatment of strip
material, the combination comprising, a tub disposed to
ing of the roll body 80 as it rotates about the shaft stub 20 contain a ?uid reagent to a predetermined height therein,
72 while maintaining the strip 12 submersed within the
strip entrance and exit supports for maintaining the strip
?uid reagent 20. This also prevents any localized pim
over the tub, at least one sinker unit disposed inter
pling areas due to the electrolytic action, since there is
mediate said supports for holding the strip material below
no way for a localized pitting to occur in the absence of
the surface of the reagent contained within the tub, said
an insulating layer of scale material. Moreover, since the 25 sinker unit comprising a pair of spaced, upwardly extend
rolls 36 are of a relatively small diameter and the bush
ing support columns disposed in an aligned relation ad
ings thereof may be exposed to the action of the salt bath,
jacent the tub, at least one pillow block rigidly secured
thus providing a continuous lubrication thereof, these rolls
to each support column, a support shaft disposed to
are not subject to large inertia and thus during strip speed
extend between said pillow blocks and rotatably secured
changes there is little, if any, slippage to thus mar the 30 therein, a pair of spaced roll supporting end plates secured
two rolls carried by the roll support end plates in spaced
1. In apparatus for the continuous treatment of strip
relation near the outer extremities thereof and disposed
material, the combination comprising, a tub disposed to
to extend therebetween, said rolls each having a prede
contain a ?uid reagent to a predetermined height therein, 35 termined diameter so that one of said rolls is wholly sub
strip entrance and exit supports for maintaining the strip
mersed in the reagent contained in the tub when the roll
over the tub, at least one sinker unit disposed intermedi
support end plates are rotated into operative position to
ate said supports for holding the strip material below the
position said one roll in a hold-down position, and means
surface of the reagent contained within the tub, said sinker
secured to at least one end of the shaft to selectively
unit comprising a rotatable support shaft disposed to ex
index the rolls into said operative position.
tend across the tub adjacent the upper edges thereof, a
5. In apparatus for the continuous treatment of strip
pair of spaced roll supporting end plates secured to the
material, the combination comprising, a tub disposed to
rotatable shaft, at least two rolls carried by the roll sup
contain a ?uid reagent to a predetermined height therein,
port end plates in spaced relation at the outer extremities
said tub being formed of a bottom, sidewalls and end
thereof and disposed to extend therebetween, each of said
walls united to contain the reagent within the con?nes
45
rolls having a predetermined diameter so that one of said
thereof, said tub also containing means to selectively
rolls is wholly submersed in the reagent contained in the
maintain the ?uid reagent contained therein within a
tub when the roll support end plates are rotated into
predetermined temperature range, entrance and exit sup
operative position to position said one roll in a hold-down
port rolls rotatably mounted adjacent the end walls of
position, and means secured to at least one end of the
the tub and disposed to suspend the strip material over
shaft to selectively index the rolls into said operative 50 the tub, at least one sinker unit positioned over the strip
position.
intermediate the entrance and exit support rolls and
2. In apparatus for the continuous treatment of strip
disposed to hold the strip material submersed in the
material, the combination comprising, a tub disposed to
reagent contained Within the tub, said sinker unit compris
contain a ?uid reagent to a predetermined height therein,
ing a rotatable support shaft, a pair of spaced roll
strip entrance and exit supports for maintaining the strip 55 supporting end plates secured to the shaft, at least two
over the tub, and at least one sinker unit for holding the
rolls carried in spaced relation by the end plates near
strip material below the surface of the reagent contained
the outer extremities thereof and disposed to be rotatably
within the tub, said sinker unit comprising a pair of
secured therebetween, each of said rolls having a pre
pillow blocks, a rotatable support shaft disposed to ‘extend
between said pillow blocks, a pair of spaced r-oll support 60 determined diameter so that one of said rolls is wholly
submersed in the reagent contained within the tub when
ing end plates secured to the rotaable shaft between the
the sinker unit is rotated into operative position to posi
pillow blocks, at least two rolls carried by the roll support
tion said one roll in a hold-down position, a worm wheel
end plates in spaced relation near the outer extremities
secured to one end of the support shaft, a worm shaft
thereof and disposed to extend therebetween, said rolls
each having a predetermined diameter so that one of said 65 secured in meshing engagement with the worm wheel,
and power means disposed to rotate the worm shaft to
rolls is wholly submersed in the reagent contained in the
selectively index the rolls of the sinker unit into a pre
tube when the roll support end plates are rotated into
determined operative position.
operative position to position said one roll in a hold-down
6. In apparatus for the continuous treatment of strip
position, and means secured to at least one end of the
material, the combination comprising, a tub disposed to
shaft to selectively index the rolls into said operative
position.
contain a ?uid reagent to a predetermined height therein,
3. In apparatus for the continuous treatment of strip
said tub being formed of a bottom, sidewalls and end
material, the combination comprising, a tub disposed to
walls united to contain the reagent within the con?nes
contain a fluid reagent to a predetermined height therein,
thereof, said tub also containing means to selectively
strip entrance and exit supports for maintaining the strip 75 maintain the ?uid reagent contained therein within a pres
3,087,505
7
determined temperature range, entrance and exit support
rolls rotatably mounted adjacent the end walls of the
tub and disposed to suspend the strip material over the
tub, at least one sinker unit positioned over the strip
intermediate the entrance and exit support rolls and dis
posed to hold the strip material submersed in the reagent
8
of the strip movement through the tub, said support
columns terminating above the sidewalls of the tub, a
pillow block rigidly secured to each of the support col
umns, a support shaft disposed to extend between said
pillow blocks and rotatably secured therein, at least one
end of said shaft extending through the pillow block a
sufficient distance to accommodate an indexing mech
contained within the tub, said sinker unit comprising
anism, a pair of spaced roll supporting end plates secured
at least a pair of upward extending support columns dis
to the shaft intermediate the pillow blocks, at least two
posed in an aligned relation in a vertical plane perpen
dicular to the direction of the strip movement through 10 rolls carried in spaced relation by the end plates near
the outer extremities thereof and disposed to be rotatably
the tub, said support columns terminating above the
secured therebetween, each of said rolls having a pre
sidewalls of the tub, a support shaft rotatably carried by
determined diameter so that one of said rolls remains
said columns, a pair of spaced roll supporting end plates
submersed in the reagent contained within the tub when
secured to the shaft, at least two rolls carried in spaced
relation by the end plates near the outer extremities 15 the sinker unit is rotated into operative position to posi
tion said one roll in a hold-down position, a worm wheel
thereof and disposed to be rotatably secured therebetween,
secured to said one end of the support shaft extending
each of said rolls having a predetermined diameter so that
through the pillow block, a worm shaft secured in mesh
one of said rolls is wholly submersed in the reagent
ing engagement with the worm wheel, and power means
contained within the tub when the sinker unit is rotated
into operative position to position said one roll in a hold 20 disposed to rotate the worm shaft to selectively index
the rolls of the sinker unit into a predetermined operative
down position, a worm wheel secured to one end of the
support shaft, a worm shaft secured in meshing engage
ment with the worm wheel, and power means disposed to
rotate the Worm shaft to selectively index the rolls of the
sinker unit into a predetermined operative position.
7. In apparatus for the continuous treatment of strip
material, the combination comprising, a tub disposed to
contain a ?uid reagent to a predetermined height therein,
position.
9. In apparatus for the continuous treatment of strip
material, the combination comprising, a tub disposed to
contain a ?uid reagent to a predetermined height therein,
strip entrance and exit supports for maintaining the strip
over the tub, at least one sinker unit disposed intermediate
said supports for holding the strip material below the sur
face of the reagent contained within the tub, said sinker
said tub being formed of a ‘bottom, sidewalls and end
walls united to contain the reagent within the con?nes 30 unit comprising a rotatable support shaft, a pair of spaced
roll supporting end plates secured to the rotatable shaft, at
thereof, said tub also containing means to selectively
least two rolls carried by the roll support end plates in
maintain the ?uid reagent contained therein Within a pre
spaced relation at the outer extremities thereof and dis
determined temperature range, entrance and exit support
posed to extend therebetween, each of said rolls having a
rolls rotatably mounted adjacent the end walls of the tub
and disposed to suspend the strip material over the tub, 35 predetermined diameter so that one of said rolls is wholly
submersed in the reagent contained in the tub when the
at least one sinker unit positioned over the strip interme
roll support end plates are rotated into operative position
diate the entrance and exit support rolls and disposed
to position said one rollin a hold-down position, a worm
to hold the strip material submersed in the reagent con
wheel secured to at least one end of the rotatable support
tained within the tub, said sinker unit comprising a pair
of pillow blocks, a rotatable support shaft disposed to 40 shaft, a worm shaft secured in meshing engagement with
the worm wheel, and power means disposed to rotate the
extend between said pillow blocks and rotatably secured
worm shaft to selectively index the rolls of the sinker unit
therein, at least one end of said shaft extending through
into a predetermined operative position.
the pillow block a sufficient distance to accommodate an
10. In apparatus for the continuous treatment of strip
indexing mechanism, a pair of spaced roll supporting end
plates secured to the shaft intermediate the pillow blocks, 45 material, the combination comprising, a tub disposed to
at least two rolls carried in spaced relation by the end
plates near the outer extremities thereof and disposed
to be rotatably secured therebetween each of said rolls
contain a ?uid reagent to a predetermined height therein,
strip entrance and exit supports for maintaining the strip
over the tub, and at least one sinker unit for holding the
strip material below the surface of the reagent contained
having a predetermined diameter so that one of said rolls
is wholly submersed in the reagent contained within the 50 within the tub, said sinker unit comprising a pair of pillow
blocks, a rotatable support shaft ‘disposed to extend be
tub when the sinker unit‘ is rotated into operative posi
tween said pillow blocks and rotatably secured therein, a
tion to position said one roll in a hold-down position, a
pair of spaced roll supporting end plates secured to the
worm wheel secured to said one end of the support shaft
rotatable shaft between the pillow blocks, at least two
extending through the pillow block, a worm shaft secured‘
in meshing engagement with the worm wheel, and power 55 rolls carried by the roll support end plates in spaced rela
means disposed to rotate the worm shaft to selectively
tion near the outer extremities thereof and disposed to ex
index the rolls of the sinker unit into a predetermined
tend therebetween, said rolls each having a predetermined
operative position.
diameter so that one of said rolls is wholly submersed in
the reagent contained in the tub when the roll support end
8. In apparatus for the continuous treatment of strip
material, the combination comprising, a tub disposed to
contain a ?uid reagent to a predetermined height therein,
said tub being formed of a bottom, sidewalls and end walls
united to contain the reagent within the con?nes thereof,
said tub also containing means to selectively maintain
the ?uid reagent contained therein within a predetermined
temperature range, entrance and exit support rolls rotat
ably mounted adjacent the end walls of the tub and dis
posed to suspend the strip material over the tub, at least
one sinker unit positioned over the strip intermediate the
entrance and exit support rolls and disposed to hold the
strip material submersed in the reagent contained within
the tub, said sinker unit comprising at least a pair of
upward extending support columns disposed in an aligned
relation in a vertical plane perpendicular to the direction
60 plates are rotated into operative position to position said
one roll in a hold-down position, a worm wheel secured
to at least one end of the rotatable support shaft, a worm
shaft secured in meshing engagement with the worm
wheel, and means disposed to rotate the worm shaft to
65 selectively index the rolls of the sinker unit into a pre
determined operative position.
11. -In apparatus for the continuous treatment of strip
material, the combination comprising, a tub disposed to
70 contain a ?uid reagent to a predetermined height therein,
strip entrance and exit supports for maintaining the strip
over the tub, at least one sinker unit for holding the strip
material below the surface of the reagent contained within
the tub, said sinker uni-t comprising a pair of spaced, up
75 wardly extending support columns disposed in an aligned
3,687,565
9
relation adjacent the tub, a support shaft rotatably carried
by said columns, a pair of spaced roll supporting end
10
mined temperature range, entrance and exit support rolls
rotatably mounted adjacent the end walls of the tub and
disposed to, suspend the strip material over the tub, at
plates secured to the rotatable shaft, at least two rolls car
ried by the roll support end plates in spaced relation near
the outer extremities thereof and disposed to extend there
between, said rolls each having a predetermined diameter
so that one of said rolls is wholly submersed in the reagent
least one sinker unit positioned over the strip intermediate
the entrance and exit support rolls and disposed to hold
over the tub, and at ‘least ‘one sinker unit disposed inter
in a hold-down position, and means secured to at least one
the strip material submersed in the reagent contained
within the tub, said sinker unit comprising at least a pair
contained in the tub when the roll support end plates are
of upward extending support columns disposed in ‘an
rotated into operative position to position said one roll in
aligned relation in a vertical plane perpendicular to the
a hold-down position, a worm wheel secured to at least 10 direction of the strip movement through the tub, said sup
one end of the rotatable support shaft, a worm shaft
port columns terminating above the sidewalls of the tub,
secured to at least one end of the rotatable support shaft,
a support shaft disposed to extend across said tub and ro
' a worm shaft secured in meshing engagement with the
tatably carried- by said columns, a pair of spaced roll sup
worm wheel, and means disposed to rotate the worm shaft
porting end plates secured to the shaft, at least two rolls
to selectively index rolls of the sinker unit into a predeter 15 carried by the end plates ‘in spaced relation near the outer
mined operative position.
extremities thereof and ‘disposed to be rotatably secured
12. In apparatus for the continuous treatment of strip
therebetween, each of said rol-ls having a predetermined
material, the combination comprising, a tub disposed to
diameter so that one of said rolls is wholly submersed in
contain a ?uid reagent to a predetermined height therein,
the reagent contained within the tub when the sinker unit
strip entrance and exit supports [for maintaining the strip 20 is rotated into operative position to position said one roll
mediate said supports for holding the strip material below
end of the shaft to selectively index the rolls into said op
the surface of the reagent contained Within the tub, said
erative position.
sinker unit comprising a pair of spaced, upwardly extend
15. In apparatus for the continuous treatment of strip
ing support columns disposed in an aligned relation adja 25 material, the combination comprising, a tub disposed to
cent the tub, at least one pillow block rigidly secured to
each support column, a support shaft disposed to extend
contain a ?uid reagent to 1a predetermined height therein,
said tub being formed of a bottom, sidewalls and end walls
between said pillow blocks ‘and rotatably secured therein,
united to contain the reagent within the con?nes thereof,
a pair of spaced roll supporting end plates secured to the
said tub also containing means to selectively maintain the
rotatable shaft between the pillow blocks, at least two rolls 30 ?uid reagent contained therein within a predetermined tem
carried by the roll support end plates in spaced relation
perature range, entrance and exit support rolls rotatably
near the outer extremities thereof and disposed to extend
mounted adjacent the end walls of the tub and disposed to
therebetween, said rolls each having a predetermined di
suspend the strip material over the tub, at least one sinker
ameter so that one of said rolls is wholly submersed in the
unit positioned over the strip intermediate the entrance
reagent contained in the tub when the roll support end
and exit support rolls and disposed to hold the strip mate
plates are rotated into operative position to position said
rial submersed in the reagent contained within the tub,
one roll in a hold-down position, a worm wheel secured
to at least one end of the rotatable support shaft, a worm
said sinker unit comprising a ‘pair of pillow blocks, a ro
tatable support shaft disposed to extend across said tub
shaft secured in meshing engagement with the worm wheel
‘and between said pillow blocks and rotatably secured
and power means disposed to selectively index the rolls of 40 therein, at least one end of said shaft extending through
the sinker unit into a predetermined operative position.
the pillow ‘block a suf?cient distance to accommodate an
13. In apparatus for the continuous treatment of strip
indexing mechanism, a pair of spaced roll supporting end
material, the combination comprising, a tub‘ disposed to
plates secured to the shaft intermediate the pillow block-s,
contain a ?uid reagent to a predetermined height therein,
at least two rolls carried by the end plates in spaced rela
said tub being formed of a bottom, sidewalls and end
tion near the outer extremities thereof and disposed to be
walls united to contain the reagent within the con?nes
rotatably secured therebetween, each of said rolls having
thereof, said tub also containing means to selectively
a predetermined diameter so that one of said rolls is
maintain the ?uid reagent contained therein within a pre
determined temperature range, entrance and exit support
wholly suhmersed in the reagent contained within the tub
when the sinker unit is rotated into operative position to
rolls rotatably mounted adjacent the end walls of the tub
position said one roll in a hold-down position, and means
and disposed to suspend the strip material over the tub, at
secured to at least one end of the shaft to selectively in
least one sinker unit positioned over the strip interme
dex the rolls into said operative position.
diate the entrance and exit support rolls and disposed to
16. In apparatus for the continuous treatment of strip
hold the strip material submersed in the reagent contained
material, the combination comprising, a tub disposed to
within the tub, said sinker unit comprising :a rotatable 55 contain a ?uid reagent to a predetermined height therein,
support shaft disposed to extend across the tub adjacent
said tub being formed of a bottom, sidewalls and end
the upper edges thereof, a pair of spaced roll supporting
walls united to contain the reagent within the con?nes
end plates secured to the shaft, at least two rolls carried by
thereof, said tub also containing means to selectively main
the end plates in spaced relation near the outer extremities
tain the ?uid reagent contained therein within a predeter
thereof and disposed to be rotatably secured therebe 60 mined temperature range, entrance and' exit support rolls
tween, each of said rolls having a predetermined diameter
rotatably mounted adjacent the end walls of the tub and
so that one of said rolls is wholly submersed in the reag
disposed to suspend the strip material over the tub, at least
ent contained within the tub when the sinker unit is To
one sinker unit positioned, Over the strip intermediate the
tated into operative position to position said one roll in a
enrance and exit support rolls and disposed to hold the
65
hold-down position, and means secured to at least one end
strip material sub-mersed in the reagent contained within
of the shaft to selectively index the rolls into said opera
the tub, said sinker unit comprising at least a pair of up
tive position.
ward extending support columns disposed in an aligned
14. In apparatus for the continuous treatment of strip
relation in a vertical plane perpendicular to the direction
material, the combination comprising, a tub disposed to
of the strip movement through the tub, said support col
contain a ?uid reagent to a predetermined height therein,
umn-s being adjacent to and terminating above the side_
said tub being formed of a bottom, sidewalls and end
walls of the tub, a pillow block rigidly secured to each of
walls united to contain the reagent within the con?nes
the support columns, a support shaft disposed to extend
thereof, said tub :also containing means to selectively main
between said pillow blocks and rotatably secured therein,
tain the ?uid reagent contained therein within a predeter 75 a pair of spaced roll supporting end plates secured to the
3,087,505
12
1 1'
References Cited in the ?le of this patent
UNITED STATES PATENTS
shaft intermediate the pillow blocks, at least two rolls car
ried by the end plates in spaced relation near the outer
extremities thereof and disposed to be rotatably secured
2,348,232
therebetween, each- of said rolls having a predetermined
2,459,254
diameter so that one of said rolls remains submersed in
2,688,333
the reagent contained’within the tub when the sinker unit
is rotated into‘ operative position to position said one roll
in a hold-down position, and means secured to at least one
end ofthe shaft to selectively index the rolls into said‘
operative position.
2,738,294
2,997,219
Trautman ____________ __ May 9,
Van Der Mei _________ __ Jan. 18,
Lorig ________________ __ Sept. 7,
Spence _____________ __ Mar. 13,
Shank _______________ __ Aug. 22,
1944
1949
1954
1956
1961
FOREIGN PATENTS
10
322,028
France ______________ __ Sept. 25, 1902
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