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Патент USA US3043007

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July 10, 1962
B. e. BIRKIN
3,642,995
ROLLERS FOR PICKLING BATHS
Filed Jan. 13, 1960
3 Sheets-Sheet 1
MN
July 10, 1962
B. e. BIRKIN
3,042,995
ROLLERS FOR PICKLING BATHS
Filed Jan. 13, 1960
3 Sheets-Sheet 2
-_ r.
July 10, 1962
B. e. BIRKIN
3,042,995
ROLLERS FOR PICKLING BATHS
Filed Jan. 13, 1960
5 Sheets-Sheet 3
3,942,995
Patented July 1%, 1962
2
FIGURE 3 is a view, similar to FIGURE 2, of a duck
3,942,995
Bernard George Birkin, Oldham, England, assignor to
ing roller,
RGLLERS FOR FICKLHQG BATES
FIGURE 4 is a view, also similar to FIGURE 2, of a
support roller,
BTR Industries Limited, London, England, a company
of Great Britain -
FIGURE 5 is a section through a modi?ed form of
Filed Jan. 13, 195i}, Ser. No. 2,220
Claims priority, application Great Britain Jan. 16, 1959
6 Claims. (Ci. 29—116)
sleeve or roll which may be used in the ducking roller
of FIGURE 3, and
FIGURE 6 is. an elevation, partly broken away and
in section, of an alternative form of support roller.
The invention relates to rollers (herein called pickling 10 partly
In the pickling plant illustrated in FIGURE 1 a steel
rollers) for use in pickling baths to carry strip steel or
strip 10 to be pickled is passed through a succession of
other metal through a pickling acid or other corrosive
pickling baths 11 containing hot sulphuric acid. The
liquid. Such pickling rollers are commonly submerged,
strip is taken over support rollers 12 and carry-over
or partly submerged, in the liquid and the metal strip
rollers
passes downwardly from the top of the bath around the 15 the acid.13 and under ducking rollers 14 submerged in
underside of the rollers and then upwardly to the top of
The. construction of a carry-over roller is shown in
the bath. When used in this way the rollers are some
times called ducking rollers. Pickling rollers are some
times also provided at the top of the bath for example, between successive baths, and the strip may pass over 20
these rollers on its way to and from the bath or baths or
between successive baths.
When used in this way the
rollers are sometimes known as carry-over rollers. Pick
ling rollers are also used to support the Wet strip at other
positions.
As such pickling rollers necessarily come into contact
with the corrosive liquid it is important that they are
constructed of, or coated with, a corrosion resistant ma
FIGURE 2. The roller has a ?xed shaft 16 of steel with
an adherent sheath 17 of ebonite over the whole of its
surface except for the end spigots 16a which are heldin
clamps outside the baths. Fitted over the centre portion
of sheath 17 there is a renewable sheath, also of ebonite,
formed of sections 18, each of L-section, The sections
18 are secured by nuts 19 acting through ebonite tubes
26 and rings 21.
Around each sheath section 18, there is a sleeve or roll
23 also of ebonite, the outer periphery of these rolls con
stituting the roller surface engaging the strip 10. The
rolls 23 have internal grooves 25 in which run bearing
terial. A material which is commonly preferred for this
rollers 26 of ebonite. These rollers run on the sheath
purpose is hard rubber (ebonite) ‘although other resistant 30 sections 18 in the grooves formed between the ?anges 28
materials such as some plastics or stainless steel, may be
of adjacent sections.
used.
Furthermore the shaft or other supporting means
for the rollers must also be resistant to corrosion.
A
common construction is to-have a ?xed shaft extending
across the bath and to have a sleeve or roll, or several
If after a period of service the rolls 23 or sections 18
become worn, they can be replaced without replacement
of the shaft '16.
The ducking roller shown in FIGURE 3 is of a con
struction which is in general like that of the carry-over
roller described above except that the rolls 23a are con
structed of hollow annular mild steel cores 30 covered
short sleeves or rolls ?tted over the shaft and rotatable
thereon. The roll or rolls constitute the rotatable sup
port for the strip. The shaft may be of steel with an
ebonite covering and the sleeve or sleeves of ebonite.
with ebonite.
With such a construction, however, substantial local wear 40
The support roller shown in FIGURE 4 is also similar
of the covering of the shaft occurs and in time the shaft
in construction to the carry-over roller described above
may be exposed to the acid and failure of the shaft occur.
except that in this case sheath sections are held by split
t is an object of this invention to provide an improved
ebonite bushes 32 held in grooves 33 in the shaft.
construction of pickling roller in which the rate of Wear
in order to reduce wear on the periphery of the rolls
is reduced.
,
23, 23a, they may be provided with tyres 36 of softer, .
According to the invention a pickling roller comprises
wear and shock resistant rubber, as shown in FIGURE
a shaft of, or coated with, a corrosion resistant material,
5. These tyres may be renewable.
a roll or rolls also of, or coated with, corrosion resistant
in cases Where the extra cost of renewable sheath sec
material ?tted over the shaft, and rotatable thereon, and
tions 18 is not justified, these may be omitted, as shown
bearing rollers or balls of, or coated with, corrosion re
in FIGURE 6, the bearing rollers 26 then running on
sistant material between the roll or rolls and the shaft.
the ?xed sheath 17. In the construction shown in
In one form of the invention the shaft is of steel coated
FIGURE 6 the rolls 23b are located in the axial direc
with hard rubber, or plastic, and the roll or rolls and the
tion by a step 37 on the sheath and ‘a ring 38 held to the
bearing rollers may also be of hard rubber or plastic.
sheath by ebonite set-screws 39.
The bearing rollers may be retained in place within 55
the roll or rolls by end plates of ebonite or other hard
rubber or plastic material and of annular form secured
to the roll or rolls. These plates may also act as spacers
The invention is not restricted to the details of the
above examples but may be practiced within the scope
of the claims. For instance, the bearing rollers may be
replaced by hearing balls and either the rollers or the
for the bearing rollers and in that case they may have,
balls may be of steel covered with ebonite. Corrosion
at intervals around the annuli, holes or sockets for ends
resistant materials other than ebonite may be used. For
on the bearing rollers of reduced diameter. Alternatively
instance an equivalent hard plastic such as polytetra?uor
the bearing rollers may be held in internal grooves with
ethylene may be used or the shaft may be of stainless
in the roll or rolls.
steel. The bearing rollers or balls may be held in cages,
Some speci?c examples of pickling rollers according to
egg. of ebonite. The individual rolls employed in any of
the invention, and their manner of use, will now be de 65 the above examples may be replaced by a single sleeve or
roll.
scribed with reference to the accompanying drawings, in
I claim:
which:
1. A pickling roller assembly for guiding traveling sheet
FIGURE 1 is a diagrammatic illustration of a strip
material Wetted with corrosive liquid, said pickling roller
pickling plant,
FIGURE 2 is a view partly in elevation and partly in 7 O assembly comprising a shafthaving an outer bearing
surface of hard corrosion resistant material, roll means
section of a carry-over roller,
including hard corrosion resistant material disposed
'
1i
'
3,042,995
4;
3
around said shaft and freely rotatable thereabout, said
able means on said shaft securing said removable second
sheath thereto.
roll means having a radially outer sheet-supporting sur
face and having a radially inner bearing surface of hard
4. A pickling roller assembly as de?ned in claim 2 in
which said sheath means comprises a removable sheath
of hard rubber having a plurality of individual sections
of L-shape in cross-section corresponding in number to
the number of said rolls with each section disposed at a
roll and having a hard rubber outer bearing surface con
plastic corrosion resistant material, annular groove means
in'one of said bearing surfaces, and bearing means in
cluding rotatable bearing elements with outer surfaces
of hard plastic corrosion-resistant material between said
shaft and said roll means with said bearing elements dis
posed in said annular groove means inrolling contact With
said radially inner bearing surface of the roll means and
with said ,outer bearing surface of the shaft to. permit
full circle rotation of the roll means about said shaft
under the turning forces exerted on the roll means by
the traveling sheet material.
tacting the said bearing elements disposed in said groove
means of the roll, and detachable means on said shaft
securing thereto said L-shaped sections arranged in end
to-end abutting relation. <
V
,
5. A pickling roller assembly as 'de?ned'in claim 2 in
a
2., A pickling roller assembly for guiding traveling
‘sheet material Wetted with corrosive liquid, said pickling
.
hard rubber contacting said bearing elements, and detach
15
roller assembly comprising a shaft‘having. sheath means
of hard rubber providing an outer bearing surface, a
plurality‘ of adjacent side-by-side rolls including hard
which each of'said rolls consists of hard rubber through
out the radial thickness of the roll wall and in which
said groove means of each roll consists of a pair of axially
spaced~apart annular grooves in said hard rubber radially
inner bearing surface of the roll, and said bearing ele
ments are roller bearing elements in said annular grooves.
rubber disposed around said shaft and sheath means with
6. A pickling roller assembly as de?ned in claim 2 in
each roll freely rotatable thereabout, each of said rolls
which each of said rolls comprises a rigid hollow annulus
having a radially outer sheet-supporting surface and hav
of steel entirely enclosed within a shell of hard rubber
ing a radially inner bearing surface ‘of said hard rubber
and a tire of resilient wear-resistant rubber about the
with annular groove means therein, and rotatable bear
radially outer periphery of'said hard rubber shell pro—
ing elements with outer surfaces ofhard rubber between 25 viding said sheet-supporting surface of‘ the roll, said shell
said sheath means and each of said rolls and disposed
providing said hard rubber radially inner bearing sur-'
in said annular groove means of each roll in rolling con
tact with said hard rubber bearing surface thereof and
with said hard rubber bearing surface of the sheath
means to permit full circle rotation of the rolls about 30
said shaft under the turning forces exerted on the rolls
by thertraveling sheet material.
3. A pickling roller assembly as de?ned in claim 2 in
which said sheath means comprises a ?rst sheath of hard
rubber vadhesively united with the material of said shaft
and having a substantially smooth cylindrical outer sur
face, and a removable second sheath of hard rubber
mounted telescopically upon said ?rst sheath in sliding ?t
relation thereto with an outer bearing surface of said
face of the roll with said annular groove means therein.
References (lited in the ?le of this patent /
UNITED STATES PATENTS
207,313
322,570
1,232,053
Smith _______________ __ Aug. 20; 1878
Wagner ______________ __ July 21, 1885
Lawrence _____________ __ July 3, 1917
2,650,603
' Howes _______________ __ Sept. 1, 1953
OTHER REFERENCES
,“Nylon Parts for Ball Bearings,” Product Engineering.
pp. 119-123. Div. 45 Feb. 1952.
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