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Патент USA US3097981

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July 16, 1953
s. s. CARLISLE ETAL
3,097,971
METHOD OF AND APPARATUS FOR SUPPORTING 0R GUIDING STRIP MATERIAL
‘Filed Nov. 9. 1960
2 Sheets-Sheet 1
INVENTQRS
BY
J? $.Car/As/e
6. H 5o><a//
////,/W M
ATTORNEYS
July 16, 1963‘
s. s. CARLISLE ETAL
3,097,971
METHOD OF AND APPARATUS FOR SUPPORTING OR GUIDING STRIP MATERIAL
Filed Nov. 9, 1960
‘
2 Sheets-Sheet z
INVENTORQ
S. S. Car/isle
BY
GM. Boxall
MMé/MM
ATTDE N EYS
‘ United States Patent 0 ’
1
3,097,971
Patented July 16, 1963
2
3,097,971
member 6 is also employed with member 4 as shown, to
form ‘a channel for passage of the strip and to provide
increased control over the strip as it passes that point.
‘Samuel Skipton Carlisle and Genefer Margaret Boxall,
London, England, assignors to The British Iron and
Steel Research Association, London, England
be increased at the entrance to the channel, as illustrated,
METHOD OF AND APPARATUS FOR SUPPORTING
OR GUIDING STRIP MATERIAL
Furthermore, the spacing between members 4 and 6 may
to facilitate entry of the strip.
Various arrangements may be used to supply ?uid to
the support surfaces. For example, in FIGURES 3 and
4 which show enlarged views of a convexly curved sup
This invention relates to the support or guidance of 10 port member, a series of ori?ces 7 are provided near the
strip material, such as, for example, steel strip passing
longitudinal edges of the supporting part" 8. These ori
through an electrolytic tinning line, continuous annealing
?eslead‘ from a cavity 9 to which ?uid is supplied at the
line or the like.
appropriate pressure.
According to one aspect of the present invention there
Further ori?ces 101 are provided towards the centre of
is provided a method of supporting or guiding strip, ma 15 the support surfaces and may be fed with ?uid at lower
terial which comprises introducing a supply ‘of pressur
pressure than ori?ces 7. Alternatively, where a common
ized ?uid between a surface, across which strip material
cavity is employed for supplying all of the ori?ces, dif
is caused to travel, and the adjacent surface of the strip
ferential ori?ce outlet pressures may be obtained by suit
able design of the ori?ces themselves.
material, whereby the strip material is maintained out of
contact with said surface.
20
In another arrangement for supply of ?uid to the sup
According to another aspect of the present invention
port surfaces use is made of slit ori?ces as illustrated in
there is provided apparatus for supporting or ‘guiding strip
FIGURE 5, for example.
material Comprising a support member, and means for
The embodiment of FIGURE 5(a) only makes use of
introducing a supply of pressurized ?uid through said
peripheral slit ori?ces 11, while those of FIGURES 5(b)
25 and 57(c) show how additional slit ori?ceslz may be dis
member to a support surface thereof.
The above method and apparatus of the present in
posed to obtain increased support in the case of heavy
vention provide, therefore, a low friction bearing. Fur
strip material or wide material more properly regarded
thermore, it is possible to avoid or reduce differential
as of sheet form.
tensions in parts of or the whole of, strip material with
If desired the slit ori?ces may contain discontinuities
out adjusting and maintaining the adjustment of the sur 30 instead of being continuous as shown in‘ FIGURE .5.
face speeds of a number of rollers, as is usually the case.
However, such discontinuities should generally be small
Also changes of strip speed may be made without diffi
in comparison with the required clearance between the
cult problems of roller speed adjustment.
support surface and supported material.
Application of the invention is particularly suitable
Clearly other variations of ori?ce form and disposition
for supporting and guiding materials, such as ferrous strip 35 are possible and one such example is a combination of
for tinplate manufacture, which require a high standard
peripheral slit ori?ces and conventional circular ori?ces
of surface cleanliness and surface ?nish.
disposed in the central region of the support surface such
Filed Nov. 9, 1960, Ser. No. 68,226
15 Claims. \(Cl. 134-15)
In order that the present invention may be more clearly
understood, the same will now be more fully described
as the ori?ce 10 of FIGURE 4.
by way of example with reference to the accompanying
drawings, in which:
slit, or other form are angled to direct ?uid towards the
centre of the support surface as illustrated by FIGURE 6.
FIGURE 1 illustrates diagrammatically one embodi
Preferably the peripheral ori?ces, be they of circular,
This enhances the cushion effect of the ?uid and delays
FIGURE 2 shows a modi?ed support member for the
the escape of ?uid from between the support surface and
supported material. Also, this angle may be varied as
embodiment of FIGURE 1,
FIGURES 3 and 4 show an enlarged, fragmentary side
and plan view, respectively, of one form of support
between the input and output sides with respect to the
strip to take account of any slipstream effect set up by
ment of the invention,
.
member.
FIGURE 5 illustrates alternative forms of support
members, and
FIGURE 6‘ illustrates a preferred feature of support
members according to the invention.
In the embodiment of FIGURE 1, means are provided
for guiding a strip of material 1 'along a serpentine path.
the strip motion.
A”
The positioning of the ori?ces, their design and size,
and the pressure of ?uid applied to them are all factors
50 ‘which may be varied as appropriate to achieve the opti
mum use of the ?uid employed according to the weight
of strip to be supported, its dimensions and ?atness.
The pressure of ?uid may be adjusted in any event to
vary the clearance between the strip and support surface
Such an arrangement meets a common requirement 55 as demanded by surface conditions or thickness of mate
where, for example, ‘a length of strip is to be contained
rial. Thus, the ?uid pressure may be increased tempo
rarily to take account of increased strip thickness in the
form of a lap joint, for example.
The invention may be applied in processes involving
bend position, each member having a convexly shaped 60 thermal or chemical treatment of strip by employing
support surface perforated with a number of holes
“bearing ?uid” of suitable composition and temperature.
through which a ?uid, such as air, for example, is forced
In particular, the invention may be used for guiding and
towards the strip. Pressurized ?uid is trapped between
supporting tinpliate during drying after wet treatment or
the support surface and the strip for a su?icient time to
during “?ash heat brightening” of electrolytic tin coating.
65
form a cushion on which the strip ?oats while being
The strip may also be used for guiding and supporting
pulled through the apparatus by draw rolls 3.
strip during continuous annealing, or any thermal or
for a period of time in a gaseous or liquid environment
within a treatment vessel or chamber of reasonable di
mensions. Fixed support members 2 are located at each
Where the strip is being pushed towards the support
chemical or thermo-chemical process in a vapor or gas
members, as opposed to, or in addition to being drawn
environment, or ‘during any cleaning or surface treatment
away from them, the members may take the form shown
process in a liquid environment.
in FIGURE 2. Here, the member 4 has a concavely 70
The invention also ?nds application in the temporary
curved support surface towards which the strip is driven
by rolls 5. Preferably, a co-operating convexly curved
storage means for moving strip'commonly referred to
as “reservoirs.”
‘
3,097,971
3
Although the above description refers almost exclu
sively to support or guidance of strip material, the ex
pression strip material, also used in the claims herein
after, is intended to include wide elongate material of
4
the path of said material, and each member being pro
vided with port means disposed substantially around the
periphery of its respective support surface for supply of
pressurized ?uid therethrough towards said path to form
various kinds which may sometimes be referred to as
a ?uid curtain which forms and maintains a cushion of
“sheet material” whether it be in continuous form or in
pressurized ?uid within the space de?ned by the material,
the support surface and the ?uid curtain, a ?rst one of
said members having a support surface of convex form,
the second one of said members having a support sur
applied to a support table and the supporting jets switched
on automatically, by photoelectric means, for example, 10 face of concave form, and the two members being located
with their support surfaces in mutually spaced and facing
as the sheet passes over successive sections of the table.
disposition on opposite sides of said path to provide a
We claim:
channel for passage of strip material therethrough along
1. A method of supporting an article which comprises
introducing a supply of pressurized ?uid through a sur
said path.
8. Apparatus according to claim 7 wherein the form
face, across which the article is caused to travel, to ?ow 15
and relative disposition of said support members is such
between the surface and the article whereby the article
as to provide a channel therebetween which is divergent
is maintained but of contact with the surface, the ?uid
being supplied at least in jets originating at the periphery
at least one end thereof to facilitate entry of strip mate
of said surface and angled inwardly relative to the nor
rial into such channel.
9. Apparatus for supporting a moving article compris
mal between said surface and the path of the article
ing a support member having a support surface for co
thereacross.
operation with a surface of an article moving thereacross,
2. A method of supporting strip material in accordance
inwardly angled ?rst port means disposed adjacent at
with claim 1 which comprises employing a different angle
least the side peripheries of said support surface relative
for ?uid jets ?rst encountered by the material in its travel
across said surface from those last encountered thereby, 25 to the path of the article ‘for supply of pressurized ?uid
away from and inwardly of said support surface to pro
whereby any undesirable effect of the slipstream asso
ciated with said material on said ?uid supply is sub
vide ?rst ?uid curtains, and second port means disposed
stantially reduced.
in said member in at least two lines transverse said sup
port surface relative to the path of the article for supply
3. A method of supporting an article in spaced rela
tion to a support surface therefor which comprises form 30 of pressurized ?uid away from said support surface to
ing a curtain of moving ?uid directed from said support
provide second ?uid curtains, whereby said ?rst and
second ?uid curtains form and maintain a pressurized
surface towards said article, and providing further supply
?uid cushion in each space between the cooperating sur
of ?uid from the support surface within the boundary
of said curtain and at different pressure from the curtain
faces and de?ned by such curtains to support the article
during movement across said support surface.
?uid, which curtain and further supply form and main
10. Apparatus according to claim 9 comprising at
tain between said surface and said article and within the
boundary of said curtain a cushion of pressurized ?uid
least one third port means disposed in said member in a
which tends to maintain the spaced relation between said
line substantially parallel to the path of the article and
surface and said article.
intermediate said ?rst port means for supply of pres
surized ?uid therethrough away from said support sur
4. Apparatus for supporting an article, said apparatus
face, to provide a third ?uid curtain.
comprising a support member having a support surface
11. Apparatus for supporting a moving article com
for cooperation with a surface of the article and which
member is provided with inwardly angled port means
prising a support member having a support surface for
disposed substantially around the periphery of said sup
cooperation with a surface of an article moving there
port surface for supply of pressurized ?uid therethrough 45 across, ?rst port means disposed adjacent at least the
side peripheries ‘of said support surface relative to the
away from and inwardly of said support surface to pro
path of the article for supply of pressurized ?uid there
vide at least one curtain of ?uid forming and maintain
ing within a space between the cooperating surfaces
through at a ?rst ?uid pressure to form ?uid curtains,
and second port means disposed in said member for
de?ned by said curtain at least one cushion of pressur
ized ?uid.
50 supply of pressurized ?uid through said support surface
5. Apparatus for supporting an article comprising a
intermediate said ?uid curtains and at a second ?uid
pressure lower than said ?rst ?uid pressure.
support member having a support surface disposed closely
12. In a process line for moving strip material a de
adjacent the path of the article, ?rst port means disposed
vice having a support surface for cooperation with a
substantially around the periphery of said surface for
supply of pressurized ?uid towards said path to form a 55 surface of strip material to be conveyed thereacross and
which device is provided with inwardly angled port means
?uid curtain, second port means disposed in said member
adjacent the periphery of said support surface for sup
within the area bounded by said ?rst port means for addi—
a discrete sheet form.
In the case of a discrete sheet, the invention may be
tional supply of ?uid towards said path, and ?uid supply
ply of pressurized ?uid therethrough away from and
inwardly of said support surface to provide at least one
means for supplying ?uid to said second port means at
a lower pressure than to said ?rst port means.
60 curtain of ?uid forming and maintaining within a space
6. Apparatus for supporting an article comprising a
support member having a support surface disposed closely
adjacent the path of the article, ?rst port means disposed
substantially around the periphery of said surface for
supply of pressurized ?uid towards said path, and second 65
port means disposed in said member within the area
bounded by said first port means for additional supply
of ?uid towards said path, said ?rst and second port
means being respectively dimensioned for delivery of
between the cooperating surfaces de?ned by said cur
tain at least one cushion of pressurized ?uid.
13. In a process line for moving strip material a
device having a support surface for cooperation with a
surface of strip material to be conveyed thereacross, ?rst
port means disposed adjacent the periphery of said sup
port surface for supply of pressurized ?uid therethrough
to form at least one ?uid curtain, second port means dis
?uid received from a common ?uid source at a higher
posed in said member within the area bounded by said
?rst port means for additional supply of pressurized
pressure through said ?rst port means than through said
?uid therethrough, and ?uid supply means for supplying
second port means.
7. Apparatus for supporting and guiding strip material
along a curved path comprising two support members
?uid at a lower pressure through said second port means
than through said ?rst port means.
14. In a process line for moving strip material a device
each having a support surface disposed closely adjacent 75 system for supporting and guiding the material including
3,097,971
5
6
a plurality of support members each having a support
surface for cooperation with a surface ‘of the material to
be conveyed thereacross and at least one of which sup
a ?rst ?uid pressure to form at least one ?uid curtain,
and second =por-t means disposed in each support member
‘within the area bounded by the respective ?rst port means
port surfaces is of curved form, wherein each support
member is provided with inwardly angled port means
for additional supply of pressurized ?uid therethrough
adjacent the periphery of its support surface for supply
of pressurized ?uid therethrough away from and inwardly
of the support surface to provide at least one curtain
of ?uid forming and maintaining within a space de?ned
by the support surface, the strip surface and the curtain 10
at least one cushion of pressurized ?uid.
,
'15. In a process line for moving elongate material a
device system for supporting and guiding the material in
cluding a plurality of support members each having a
support surface for cooperation with a surface of the 15
material to be conveyed thereacross and at least one of
which support surfaces is of curved form, ?rst port
means disposed adjacent the periphery of each support
surface for supply of pressurized fluid therethrough at
at a second ?uid pressure lower than said ?rst ?uid
pressure.
References Cited in the ?le of this patent
UNITED STATES PATENTS
-821,250
Miller _______________ __ May 22, 1906
1,844,798
Schroeder ____________ __ Feb. 9, 1932
2,418,386
2,689,196
2,900,991
2,919,706
2,993,492
Wood _______________ __ Apr. 1,
Daniels _____________ __ Sept. 14,
Arnold ______________ __ Aug. 25,
William _____________ __ Jan. 5,
Mains _______________ __ July 25,
1947
1954
1959
1960
1961
FOREIGN PATENTS
585,073
Canada _____________ __ Oct. 13, 1959
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