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Патент USA US3048192

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Aug- 7, 1962
Filed April 21, 1958
- fire
Patented Aug. 7, 1962
rollers may be'arranged in series to guide the strip-or wire
repeatedly up and down and thus to prolong its residence
time in the tower 3 or to enable a lower construction of
Othmar Ruthner, 12 Saimgasse, Vienna, Austria
Filed Apr. 21, 1958, Ser. No. 729,892
Claims priority, application Austria Jan. 10, 1958
4 Claims. (Cl. 134-—-63)
a larger number of reversing rollers are provided the
This invention relates to apparatus for pickling wire
or strip stock, which apparatus is simple and inexpensive
in construction, involves low maintenance costs and
enables a quick movement of the stock through the ap
paratus while ensuring an effective treatment.
The known apparatus for pickling wire or strip stock
are expensive and can often be operated only by specially
skilled operators.
In many cases these apparatus can be
economically operated only above a minimum capacity,‘
which cannot be achieved by smaller plants. Another
disadvantage of the known apparatus is the large space
It is a feature of the invention to‘ provide an apparatus
for pickling wire or strip stock, which apparatus com
the tower. ‘The following description will refer only to
one upper reversing roller 6 and two lower ones 5. Where
measures which will be described hereinafter may readily '
be applied to the additional upper and lower reversing
rollers, respectively.
To form the strip or wire loop at the beginning of the
pickling process, the upper roller 6 may consist of two
tapered half-rollers 6’, 6", as is shown in FIG. 2. These
half-rollers are laterally moved out of their operating
position in the direction indicated by the arrows when the
strip is introduced at the beginning of the pickling oper
The taper of the rollers will enable an accurate
guidance of the strip and prevent a lateral displacement
of the strip ‘during its movement through the tower.
The half rollers 6', 6” may be provided ‘with lateral de
flector discs 36 for safety reasons.
A travelling crab 10 is arranged on a frame 9 over the
tower and is movable on rails. After the cover 7 has
ben removed a gripper 30, a hoop or the like can be
lowered from this travelling crab into the tower. With
guiding the stock to be pickled up and down along a 25 this construction the strip may be introduced at the be
winding course and means for applying pickling acid to‘
ginning of the process by pulling the strip through in a
prises a towerlike structure, having‘ a substantially acid
resisting inside wall and having in its interior means for
the stock to be treated, means being provided for pulling
said stock through the towerlike structure.
‘It is another feature of the invention that the tower
is self-supporting and has a lining of acid-resisting bricks.
It is a further feature of the invention to provide photo
electric cells in the pickling tower for controlling the
speed at which the stock to be pickled is pulled through
horizontal direction below the lower reversing rollers 5,
as is indicated in broken lines in FIG. 1. When the half
rollers 6’, 6" are now laterally extended and the cover 7
is opened, the gripper 30 of the travelling crab 10, which
has previously been moved over the desired point, may be
lowered into the tower as far as to the strip. The gripper
34} holds suitably a carrier 31, which is passed below the
strip, as shown in broken lines in FIG. 1, after the gripper
the tower, which photo-electric cells are responsive to the
brightness of the strip or wire surface bypassing them. 35 has been lowered.
' An illustrative embodiment of the pickling plant ac
cording to the invention is diagrammatically shown in V
The gripper 30, which is suitably
formed as a tongs, then grips the carrier 31 and is subse
quently pulled up by the traveling crab 10 until the half
rollers 6’, 6" can be moved under the strip, which forms
FIG. 1 is a cross-sectional view of the pickling
a loop. At this time the travelling crab 10 will stop the
40 upward movement of the gripper, the half-rollers 6’, 6"
FIG. 2 is a fragmentary view in elevation of the upper
are moved under the strip and ?nally the gripper 36 is
the drawing:
reversing device, and
FIGS. 3 and 4 are views respectively of two other
embodiments of an upper reversing device.
lowered until the strip will be supported by the half-rollers
6', 6" when the carrier 31 is removed.
Another method of forming the. strip or wire loops ,
Referring now to the drawing in detail, speci?cally to 45 at the beginning of the pickling process may be adopted if
FIG. 1, the strip or wire 2 to be treated is fed from a
the upper reversing roller 6 is vertically displaceably ar
supply reel 1 by Way of a series of subsequently arranged
ranged. To this end, a single roller 6a is provided, as
auxiliary devices such as straightening rolls 2.0, a shear 21,
shown in FIG. 3, on both sides with guide portions 24,
a welder 22 and a cleaning plant 23 to the actual pickling
which are vertically slidable along rails held on the side
plant 3. This has the form of a tower. Any existing 50 walls of the tower 3. The up and down movement of
tower of any desired construction may be used for this‘
the roller is effected by means of a cable 25 and a winch
purpose irrespective of the purpose for which it was used
26, which is rotatable in ‘both directions and driven by
before. The tower may consist of metal, plastic or
a reversible motor 27.‘
masonry and is lined with acid-resisting bricks on the
The vertical displacement of the reversing roller 6a
inside. The tower is suitably gas-tight ‘or substantially 55 serves mainly for pulling in the strip or wire at the. be
gas-tightly sealed towards the outside in order to enable
ginning of the process. For this step, the roller 6a is
the use of acid fumes within the tower. The cover 7' of
lowered below the lower reversing rollers 5 so that the
the tower is desirably removable and hinged. It is ob
strip or wire can be pulled through between the rollers
vious that other provisions may be made to enable ‘an
5 in a horizontal direction, as indicated by the broken line
opening of the cover 7 or to provide access to the interior
in FIG. 1, just as in‘ the previously described operation.
of the tower from the top. If the tower is‘ gas-tight or
While the supply reel 1 is running continuously, the roller
substantially gas-tight the cover 7 of the tower 3 must
6a is then lifted to guide the strip or wire in the form
also be gas-tight or substantially gas-tight.
of a loop.
Guide rollers 4 are arranged at the inlet'and outlet of
In order to reduce the ‘weight of the upper reversing
the tower and reversing rollers 5 are arranged between 65 roller 6 it is desirable to divideit into a plurality of rollers
said guide rollers and cooperate with upper reversing
6b smaller in diameter, which are arranged along an imag
roller 6 in such a mannre that the reversing rollers 5 and
inary arc and carried by a common support 37. This
6 guide the strip or wire up and down alongra winding
is shown in FIG. 4. This support together with the roll
course. For the sake of simplicity only one upper and
ers can be moved out of its operating position and can be
two lower reversing rolls are shown in the drawing sothat 70 lowered, if desired, as has been described hereinbefore
the strip 2 or the wire forms only a single loop. It is
for the half-rollers 6', 6” and the roller 6a.
obvious, however, that any desired number of such
This construction affords the further advantage that
the strip will be engaged only by narrow areas
at the point of reversion so that the friction is much
lower than in a construction having integral rollers. It
is obvious that the lower reversing rollers 5 may also
be divided in like manner into a plurality of rollers.
Pans 5t? may be disposed below the lower reversing
rollers 5 for collecting the pickling acid running down,
which will then wet the lower bends of the strip. The
pickling acid ?ows from these pans into the tank 17. It
is desirable that the pans 50 with their ?xing means can
The pickling liquor, which is required for treating the
be moved out of their operative position so that the strip
strip or wire, is introduced in several levels by means of
to be pickled can be freely pulled through below the
rollers 5 at the beginning of the process.
After having left the tower 3 the strip or wire is moved
annular nozzles 11, which spray the pickling liquor on the
strip from all sides. The pickling liquor which is run
ning down is collected in a collecting space 17 at the bot
tom of the tower 3 ‘and is recycled to the nozzles .11
through a regenerating plant, not shown, and the conduit
39 by means of the pump 40. In the drawing the pump
4%) is shown directly connected to the space 17, for the
sake of simplicity. It is understood that fresh acid must
be added to compensate the consumption.
Photo-electric cells 41, 42, 43 are provided on various
levels, in the present case in three tiers, in the tower 3.
These photo-electric cells control the speed at which the
strip or wire moves through the tower in dependence on
the brightness of the strip or wire bypassing the photo
electric cells. The photo-electric cells are adjusted to be
non-responsive to a predetermined brightness of the strip
passing by; in that case they will not actuate the control
mechanism. The brightness value to which the photo 25
through rinsing devices 55, a drying plant 56 and a shear
57 to one of the two wind-up reels 13. The provision of
two wind-up reels has the advantage that when one reel
is ?lled and the strip or wire has been cut the same can
be immediately passed on to the second reel without need
for an interruption of the movement of the strip or wire.
Two wind-‘off reels 1 may be provided for the same reason.
In this case the second reel may be used as soon as the
?rst reel has been emptied so that the operation can be
continued without interruption. In the meantime, a full
reel can be replaced for the empty one.
It is suitable to provide inspection windows 15 for
watching the pickling operation in the side wall of the
tower 3. On the side of the tower a cage 16, which can
be moved like a lift, is provided for the operator or for the
person in charge of the maintenance of the tower. Man
electric cells are set decreases progressively from the
Thus, the zero
brightness for the cell 43 is higher than that for the cell 42
and that for the cell 42 is higher than that for the cell
41. If the strip is moving too fast through the tower so 30
holes, not shown, for repair purposes also provided in
ment of the strip through the pickling plant in the case
of an interruption in the feeding of the strip, e.g. if the
strip is to be welded in the welding plant 22. Overpickling
could result if the strip were to remain stationary in the
tower during the welding operation unless the supply of
liquid was interrupted. Even if the supply of acid was
interrupted the acid which adheres longer than necessary
over the upper reversing roller.
the wall of the tower.
The tower may form a self~supporting structure and is
suitably provided with iron reinforcements. If the tower
is gas-tight, warm to hot acid may be used. The fumes
which develop contribute to a high degree to the pickling
that it is not adequately pickled, its brightness will be
so that the operation can be performed more intensively
lower than desired or prescribed. In this case the strip
and quickly and with a much smaller consumption of
surface bypassing the lower cell 43 has a brightness below
acid than with the known processes. The acid which is
the zero setting of that cell. As a result, the cell will in
fluence the control mechanism so that the latter reduces 35 used consists preferably of I-lCl or H2804. The tower
the speed at which the strip is moving through the tower
may be constructed as a gas chamber, in which the acid
so that the strip will be exposed to the action of the acid
fumes are under superatmospheric pressure to accelerate
for a longer time. The regulation may be eifected in
the pickling process.
such ‘a manner that the impulse delivered by the photo
The tower may have any desired height, e.g.,, 100 me
electric cells varies the speed of the drive means forvthe 40 ters. An‘ entirely closed tower may also be used. The
wind-up reel 13 and for the wind-off reel 1. If the strip
tower may have the form of a chimney existing chimneys
is moving too slowly through the tower the uppermost
may be used for this purpose.
photo-electric cell 41 will be bypassed by a strip surface
What is claimed is:
which is brighter than the adjusted zero brightness so that
1. Apparatus for pickling wire and strip stock, com
the photo-electric cell 41 responds and causes an accelera 45 prising a vertically elongated substantially gastight hous
tion of the strip. In the ?rst case an insu?icient pickling,
ing having an acid-resisting inside wall, upper and lower
in the second case an excessive pickling, which would em
reversing rollers for guiding the stock to be pickled in a
brittle the material, is prevented. Instead of or in addi
path vertically up and down through said housing, said
tion to ‘a variation of the speeds of the two reels, an up
upper reversing roller being temporarily movable out of
ward or downward movement of the upper reversing roller 50 an operable position in which the stock is engaged to an
6 may be employed to control the passage time of the strip
inoperable position out of the path of the stock, nozzles
or wire. When the roller 6 is continuously raised, more
for spraying a pickling liquor on the stock, said housing
stock will enter the tower at the guide roller 4 than leaves,
being provided with entry and exit openings for the stock,
the tower at the outlet guide roller so that the strip or
said openings and said lower reversing rollers being so
wire will remain longer in the tower. This will be re
arranged that upon initial feeding of stock through the
versed if the roller 6 is lowered to reduce the stay time of
housing it extends effectively horizontally therethrough,
the strip or wire in the tower.
and means on said housing for pulling the effectively hori
The last-described function of the roller 6 may also be
zontally extending stock vertically with respect to the
used for storage purposes. If the roller 6 is in an elevated
housing to form a loop of su?icient length, to reach the
position it may be slowly lowered to maintain the move 60 upper reversing roller to facilitate the threading of stock
lowermost tier to the uppermost one.
to the strip would deteriorate the strip surface. When the ,
normal movement of the strip is resumed after the de
scribed interruption, a faster movement of the strip from
the wind-01f reel can be effected at the beginning while
the roller 6 is raised to ensure that a length of strip is in
reverse, as before the interruption, for unforeseen events.
2. Apparatus according to claim 1 wherein said stock
pulling means includes a crab movable on the upper por
tion of the housing, a gripper depending from the crab
and movable vertically with respect thereto, and said
gripper including means for engaging the stock which has
been initially fed through the housing for pulling the stock
toward the crab‘ to form a loop of sui'licient length to reach
the upper reversing roller.
3. Apparatus for pickling wire and strip stock, compris
ing a vertically elongated substantially gastight housing
having an acid-resisting inside wall, upper and lower re
versing rollers for guiding the stock to be pickled vertical
When the roller 6 has reached its upper position the speed
of the strip through the tower 3 is adjusted to normal.
75 ly up and down through said housing, nozzles for spray
ing a pickling liquor on the stock, said housing being
provided with entry and exit openings for the stock, said
said nozzles being arranged throughout the length of the
upwardly and downwardly moving portions of the stock,
said housing being provided with openings in its lower
portion through which the stock enters and leaves the
housing thereby preventing the rising vapors of the pick
ling liquor from escaping, and means at the bottom of
the housing for collecting the pickling liquor which runs
down along the stock and for recycling the collected
liquor through a regenerating plant to said nozzles.
openings and said lower reversing rollers being so ar
ranged that upon initial feeding of stock through the hous
ing it extends effectively horizontally therethrough, said
upper reversing roller being mounted for selective verti
cal movement between the upper portion of the housing
and a lower position below the plane of the stock when
it is initially fed through the housing, whereby said upper
roller may ‘be moved into its lower position before initial
feeding of stock through the housing and moved to its
upper position ‘after such feeding to facilitate threading of
the stock over said upper reversing roller.
4. Apparatus for pickling wire and strip stock, com
prising a vertically elongated, substantially gastight hous
ing having an acid-resisting inside wall, upper and lower
reversing rollers for guiding the stock to be pickled ver
tically up and down through said housing and thereby
References Cited in the ?le of this patent
forming at least one elongated loop in the stock, means
on the housing for initially gripping andv drawing up the
end of the stock to form the loop about said upper and
lower reversing rollers, a cover on said housing forming
a gastight seal with the housing when closed and when
opened permitting the introduction through the top of
the housing of said means, sets of vertically spaced nozzles 25
for spraying a pickling liquor on the stock from all sides,
' 2,104,103
' 2,649,099
Gulliksen ____________ __ Oct. 9, 1934
Dinley ______________ __ Oct. 22, 1935
Ruthven _____________ __ Jan. 9, 1938
True et al. ___________ .._ Oct. 1,
Ferm _______________ __ Aug. 11,
Plott _________________ __ May 4,
Woppman et al. _______ __ Jan. 9,
Ayers _______________ __ June 29,
Bowers et al __________ __ Dec. 11,
Johnson _____________ __ Feb. 17,
Hu? ________________ __ Aug. 18, 1953
Campbell _____________ __ Sept. 1, 1953
Rodman _____________ __ Feb. 7, 1956
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