U.S. patent number 3,828,410 [Application Number 05/334,955] was granted by the patent office on 1974-08-13 for honeycomb roll.
This patent grant is currently assigned to Gaston County Dyeing Machine Company. Invention is credited to Dieter F. Zeiffer.
United States Patent |
3,828,410 |
Zeiffer |
August 13, 1974 |
HONEYCOMB ROLL
Abstract
A honeycomb roll is provided in which the honeycomb structure
incorporates partitioning aligned with the roll axis and which may
be formed to present the thinnest practical outer edges at the roll
body surface in combination with inner edges of substantially
greater thickness for enhancing the effect of suction influence
applied through the honeycomb structure. The preferred embodiment
employs a plurality of specially formed annular members secured in
assembled relation as a honeycomb structure in roll body form.
Inventors: |
Zeiffer; Dieter F. (Charlotte,
NC) |
Assignee: |
Gaston County Dyeing Machine
Company (Mt. Holly, NC)
|
Family
ID: |
23309608 |
Appl.
No.: |
05/334,955 |
Filed: |
February 22, 1973 |
Current U.S.
Class: |
492/32;
492/49 |
Current CPC
Class: |
D06B
15/04 (20130101) |
Current International
Class: |
D06B
15/04 (20060101); D06B 15/00 (20060101); B21b
027/02 () |
Field of
Search: |
;29/121R,121A,125 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Guest; Alfred R.
Attorney, Agent or Firm: Richards, Shefte & Pinckney
Claims
I claim:
1. In a honeycomb roll, the improvement comprising a roll body
having a honeycomb structure of tubular configuration incorporating
regularly spaced and radially oriented partitioning aligned with
the axis of the roll body, all said partitioning presenting the
thinest practical outer edges to maximize open area at the roll
body surface in combination with inner edges of substantially
greater thickness to allow the most effective and efficient use of
suction applied through the honeycomb structure.
2. In a honeycomb roll, the improvement comprising a roll body
having a honeycomb structure of tubular configuration incorporating
a plurality of annular members each having a base portion in the
form of a planar oriented annulus from the full width of which
rectangular and radially oriented partition portions extend
perpendicularly in regularly spaced relation, and means for
assembling and fixing said annular members in series on a common
axis with the partition portions thereof aligned.
3. In a honeycomb roll, the improvement defined in claim 2 in which
aligned assembly bores are formed through said partition portions
and the base portions thereat, in which a pair of end flanges is
provided, and in which tie rods are extended through said assembly
bores and secured at said end flanges to fix said annular member
series in assembled roll body form.
4. In a honeycomb roll, the improvement defined in claim 2 in which
said base and partition portions are tapered to present the thinest
practical outer edges at the surface of said roll body.
5. In a honeycomb roll, the improvement defined in claim 4 in which
the thinness of said base and partition portion outer edges is in
the order of about 1/32 inch or less.
6. In a honeycomb roll, the improvement defined in claim 4 in which
said partition portions are also formed to present inner edges of
substantially greater thickness.
7. In a honeycomb roll, the improvement defined in claim 6 in which
the thickness of said partition portion inner edges is in the order
of about 3/32 inch or more.
8. In a honeycomb roll, the improvement defined in claim 2 in which
the perpendicular extent of said partition portions is proportioned
within the strength characteristics of said portions to form said
annular members as suitable modules of roll body length.
9. In a honeycomb roll, the improvement defined in claim 4 in which
the outer edge thinness and the spacing of said partition portions
is selected to maximize open roll surface area to the fullest
extent possible under the contemplated conditions of roll use.
10. In a honeycomb roll, the improvement defined in claim 3 in
which the extending edges of said partition portions have central
ribs raised lengthwise thereof and the side of said base portion
opposite said partition portions has complementary grooves aligned
therein for interfitting with said ribs when said annular members
are assembled in roll body form.
11. In a honeycomb roll, the improvement defined in claim 10 in
which the ribs raised at the extending partition portion edges
terminate short of the outer partition portion edges and merge
inwardly with a portion of said extending edges that is raised at
full width to the height of said ribs adjacent the inner partition
portion edges, and in which the side of said base portion opposite
said partition portions is annularly relieved adjacent the inner
edge thereof in a complementary extent for receiving said inner
raised extending edge portions when said annular members are
assembled in roll body form.
12. In a honeycomb roll, the improvement defined in claim 11 in
which said aligned assembly bores open through said base and
partition portions at the annular relief in the former and the
inner raised extending edge portion of the latter.
13. In a honeycomb roll, the improvement defined in claim 3 in
which said end flanges are formed with an annular shoulder
proportioned in relation to the inner diameter of said annular
member so as to extend within the end members of said plurality and
center the same at said flanges.
14. In a honeycomb roll, the improvement defined in claim 13 in
which said end flanges are apertured in alignment with said aligned
assembly bores, and in which said tie rods are threaded at both
ends and extended through the assembly bores of said annular member
plurality and through the apertures of said end flanges with nuts
engaging the threaded tie rod ends in back of said flanges and
biasing means interposed between one of said nuts and the back of
one flange and compressed thereat to tension said tie rods.
Description
CROSS-REFERENCES TO RELATED APPLICATIONS
None; although copending application Ser. No. 240,010, filed Mar.
31, 1972, now U.S. Pat. No. 3,755,869, issued Sept. 4, 1973,
describes and claims an alternative honeycomb roll structure of
generally related interest.
BACKGROUND OF THE INVENTION
Honeycomb rolls find considerable use for extraction or drying
purposes, as in dealing with textile web material after washing. As
heretofore provided such rolls have commonly been formed by
constructing a network of relatively thin straight and undulated
strips that were alternated in honeycomb fashion and supported
between end members or on some sort of spider structure. Sometimes
only alternately reversed undulating strips have been used in
forming the honeycomb network. Representative examples are
illustrated and described in U.S. Pat. Nos. 3,259,961 and
3,100,928.
The honeycomb network has the significance of providing a roll
surface of high percentage open area that results in handling web
material thereat in a substantially even manner so that surface
patterns which might otherwise form in the web during subsequent
handling are prevented. However, the prior practice of forming the
honeycomb networks from a system of strips as mentioned above is
quite expensive because of the great amount of labor involved, and
the present invention materially reduces costs in this respect
while providing a roll structure which is sturdier and more easily
adapted to varying sizes and circumstances, as well as being
considerably simpler than that disclosed in the above-noted
copending application and also readily adaptable for applying
suction at the roll surface to the best advantage.
SUMMARY OF THE INVENTION
In preferred form, the honeycomb roll of the present invention
incorporates a plurality of annular members each having a base
portion in the form of a planar oriented annulus from the full
width of which rectangular and radially oriented partition portions
extend perpendicularly in regularly spaced relation, which are
assembled and fixed in series on a common axis with the partition
portions aligned to provide a honeycomb structure in roll body
form.
The honeycomb structure thus provided includes partitioning aligned
with the axis of the roll body that may be formed to present the
thinnest practical outer edges at the roll body surface in
combination with inner edges of substantially greater thickness so
as to make the most effective and efficient use of suction applied
through the honeycomb structure for extraction or drying.
The relative thinness at the outer edges of the honeycomb structure
is significant in several respects. In the first place, these outer
edges must afford adequate support at the roll surface for the
material being handled thereat under the conditions imposed by the
use to which the roll is being put, so that the outer edges cannot
be thinner than will allow them to afford such support. Also, the
permissible outer edge thinness is, of course, affected by the
physical capacity of the material used in constructing the
honeycomb to provide outer edges of sufficient strength and
serviceability, and a related design factor will be the outer edge
spacing selected for the particular processing conditions
contemplated.
On the other hand, however, it is desirable that the outer
honeycomb edges be as thin as possible in order to maximize the
open area percentage at the roll surface so that material being
handled thereat sees as little supporting surface as possible and
is consequently subjected as evenly as possible to the suction
influence applied through the honeycomb structure for extraction or
drying.
Accordingly, by "the thinnest practical outer edges" it is meant
that the outer honeycomb edges are formed as thin as the physical
capacity of the material from which they are formed will allow
consistent with adequate support of the material to be handled at
the honeycomb surface in light of the particular honeycomb design
being used and the nature of the processing to be performed.
Similarly, in referring to partitioning having "inner edges of
substantially greater thickness so as to make the most effective
and efficient use of suction applied through the honeycomb
structure" it is meant that, beyond designing sufficient structural
strength into the partitioning, the inner edges of the axially
aligned partitioning are also made enough thicker than the outer
edges so that the suction influence can be localized effectively at
one or more of the spacings therebetween to use the available
suction in relation to material being handled to the best
advantage, as described further below.
The preferred embodiment of the present invention, which allows
size and open area percentage and strength to be selected with
great flexibility in relation to the conditions of contemplated
use, is also described further below in connection with the
accompanying drawings.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic illustration exemplifying the manner in which
honeycomb rolls embodying the present invention may be used;
FIG. 2 is a side elevation, partially broken away, of a honeycomb
roll constructed in accordance with the preferred embodiment of the
present invention;
FIG. 2a is an enlarged sectional detail of a sufficient portion of
FIG. 2 to show more clearly the assembly arrangement of the annular
members;
FIG. 3 is a partial section detail of one of the annular members
substantially as seen at the line 3--3 in FIG. 2;
FIG. 4 is a fragmentary side view as seen from the left in FIG. 3,
in relation to which a dotted line representation of a suction slot
is added;
FIG. 5 is an enlarged and partly sectioned detail taken
substantially at the line 5--5 in FIG. 4;
FIG. 6 is a plan view corresponding to FIG. 5; and
FIGS. 7 and 8 are respective right- and left-hand elevations
corresponding to FIG. 5.
DETAILED DESCRIPTION OF THE INVENTION
In FIG. 1 of the drawings, a honeycomb roll is represented at 10
arranged with a stationary suction box 12 therein for extraction
purposes, with a following larger sized honeycomb roll 100 arranged
for drying, so that a textile web W may be trained over them
successively as shown for extraction and drying following washing
or the like. The illustrated arrangement is such that a high
velocity air flow is pulled through the honeycomb network of the
roll 10 by the suction box 12 to extract a good percentage of the
moisture ahead of the drying stage and thereby materially lessen
the drying load.
The drying roll 100 is suitably arranged within a bank of heater
lamps 102 or the like shielded by a hood 104 and extending about
roll 100 for substantially the full extent of the warp of web W
thereon. Internally the roll 100 is provided with a suction means
at 106 and a stationary baffle at 108 that reaches arcuately within
that portion of the roll circumference at which the web W does not
wrap, so that the suction means 106 induces a low velocity air flow
between the heater bank 102 and the remaining circumferential
portion of the honeycomb network of roll 100 to dry the web W
before it is taken away over an idler 110.
Honeycomb rolls embodying the present invention are readily
constructed to serve effectively as either the extraction roll 10
or the drying roll 100 in arrangements of the foregoing sort, or in
any other situation in which honeycomb rolls have heretofore found
use. FIG. 2 indicates the general arrangement of a preferred
embodiment constructed in accordance with the present invention in
which a plurality of the previously mentioned annular members are
shown in fragmentary section at 14 assembled to constitute the roll
body 16 and form a honeycomb network at the working surface thereof
as diagramed partially at 14'.
For assembling the annular members 14, a pair of end flanges 18 is
provided on which annular shoulder portions 20 are formed to fit
the inner diameter of the annular members 14 so as to extend within
the end members of the assembly and center the same at the flanges
18. Also, the end flanges 18 are apertured, in alignment with
assembly bores in the annular members 14 as will be noted further
presently, to receive tie rods 22 that are threaded at both ends
and extended through the annular members 14 and through the end
flanges 18 with nuts 24 engaging the threaded tie rod ends in back
of the flanges 18 and biasing means 26 interposed between one of
the nuts 24 and the back of the adjacent end flange and compressed
thereat to tension the tie rods 22. A plurality of disc springs is
advantageously used as the biasing means 26 because of the
relatively level spring rate provided in this way, and in
consequence of which the tightening of nuts 24 to compress the
interposed biasing means to a particular length can be depended on
to impose a desired tension load on the tie rods 22 rather closely.
Such tensioning of tie rods 22 acts to rigidify the assembled
annular members 14 in roll form quite satisfactorily.
In addition, the end flanges 18 are formed for centering in turn on
mounting flanges 28 and securing thereto by screws as at 30. One of
the mounting flanges 28 also carries a sprocket member 32 at which
the drive for rotating the roll is introduced, and both mounting
flanges 28 are fitted interiorly with a bearing unit 34 at which
the roll structure is supported for rotation by a suitable spider
arrangement (not shown) radiating from an axial member 36 extending
through the roll structure between attaching flanges 38 provided at
each end for installation of the roll structure on the frame on the
equipment in which it is to be used. The axial member 36 also
serves as part of the suction system and is provided in tubular
form for this purpose so that it may be tapped adjacent either or
both ends for connection with a suitable vacuum source (not shown)
to impose the applied suction at a connected suction box comparable
to that indicated at 12 in FIG. 1, or simply adjacent the roll axis
as indicated at 106 in FIG. 1.
The remaining drawing illustrations detail further the general form
of the annular members 14 and particulars of their preferred form.
FIGS. 3 and 4 show these members 14 generally to comprise a base
portion 40 in the form of a planar oriented annulus, and
rectangular and radially oriented partition portions 42 extending
perpendicularly from the full annulus width in regularly spaced
relation, with the previously mentioned assembly bores for tie rods
22 formed at 44 through the base and partition portions 40 and 42
adjacent the inner edges thereof.
FIGS. 5 to 8 provide enlarged illustrations of the particular form
of annular member base and partition portions 40 and 42 that is
preferred. Because the annular members 14 are preferably formed of
molded plastic the partition portions 42 are tapered in the
direction of their extent (see FIGS. 6 and 7) to provide the
necessary molding draft, apart from any structural consideration.
Additionally, however, both the base and partition portions 40 and
42 are tapered toward their outer edges 46 and 48 to present the
thinnest practical edges at the working surface of roll body 16, as
noted earlier, to minimize the area of contact with fabric or other
material being handled at which the extracting or drying influence
applied through the honeycomb structure is blocked or lessened. In
general, it is desirable, and entirely feasible, to provide a
thinness of these outer edges 46 and 48 in the order of 1/32 inch
or less.
As to perpendicular extent, the partition portions 42 are
proportioned, within the strength characteristics of the material
from which they are formed, to provide the annular members 14 as
suitable modules of roll body length. For example, annular members
14 designed according to the present invention for use in forming
an extraction roll having a diameter of about 12 inches and a
length of about 80 inches were proportioned with a base portion
annulus width of 7/8 inch and a partition portion extent sufficient
to provide an annular member width or thickness in the roll length
dimension of about 1/2 inch so that any particular roll length
desired could be obtained readily by simply using the number of
annular members 14 needed to produce it.
Spacing of the radially oriented partition portions 42 in the
foregoing exemplary design was set at 3.0.degree., or 120 pitches
about the base portion annulus, so as to provide honeycomb openings
at the roll surface that are approximately square. The object in
any case is to maximize open roll surface area so that the material
to be handled thereat is not subjected to any unduly different
influence at the outer base and partition portion edges 46 and 48
under the conditions of roll use. As the above-noted exemplary
design was intended for use in forming an extraction roll which
would involve inducing a relatively high velocity suction influence
at the roll surface, the partition portion extent and spacing
needed to be designed for adequate working surface support of the
material being handled against this influence. In larger roll
structures, of say 36 inches diameter such as are used for drying
that requires only a relatively low velocity suction influence, the
honeycomb openings can be larger and the 3.0.degree. partition
portion spacing could probably be maintained at a 36 inches
diameter with proportionate lengthening of the partition portion
extent to provide an approximately square opening and a suitable
length module. In any event, prior experience with the use of
honeycomb rolls has established quite fully the extent of working
surface open area that is tolerable under varying conditions of
roll use, and the present invention makes it possible to simplify
honeycomb roll construction materially while following previously
established experience as to permissible open area extent.
In order to increase structural strength against the torsion load
resulting from the end drive at the sprocket member 32, the
extending edges of the partition portions 42 are preferably formed
with central ribs 50 raised lengthwise thereof, and the opposite
side of the base portion 40 from which the partition portions
extend with complementary grooves 52 aligned therein for
interfitting with the ribs 50 when the annular members 14 are
assembled in roll form. The ribs 50 terminate short of the outer
partition portion edges 48, so as not to interfere with the
narrowing taper adjacent these outer edges, they merge inwardly
with extending edge portions 54 that are raised at full width to
the height of ribs 50 adjacent the inner partition portion edges.
In addition, the side of base portion 40 opposite that from which
the partition portions 42 extend is annularly relieved at 56
adjacent the inner edge thereof in a complementary extent for
receiving the raised extending edge portions 54 upon assembly of
the annular members 14. Also, it should be noted that the aligned
assembly bores 44 open through the base and partition portions 40
and 42 at the annular relief 56 in the former and the raised
extending edge portion 54 in the latter. The result is an
interfitted keying of the annular members 14 upon assembly that not
only strengthens the assembly nicely against the torsion load
imposed by the drive as previously mentioned, but that also effects
and maintains an aligned centering of the annular members 14 as
they are assembled, so that the tie rods 22 are substantially
relieved of any function or resulting stress other than that of
supplying an adequate assembly tension lengthwise of the roll body
and only relatively small size tie rods 22 (e.g., about 1/16 inch
diameter) are needed for this purpose.
While the foregoing tie rod assembly arrangement is an
exceptionally simple and effective one, particularly for relatively
long rolls, other assembly means can be employed whenever desired
and may even be preferable for short roll lengths. For example, the
annular members 14 can be secured in series by adhesive or, if
formed of plastic, they can be fused or designed for snapping
together in interlocking relation. When the annular members 14 are
formed of plastic as preferred, the plastic used needs to be
selected for adequate temperature and chemical resistance under the
conditions to be encountered during contemplated use, but such
selection is readily made among the numerous plastic materials
commercially available. The tie rods 22 are suitably formed of
stainless steel wire, and the remaining parts of the FIG. 2
assembly of such materials as have heretofore been commonly used
for comparable parts of honeycomb roll structures.
It should also be noted that in addition to forming the annular
member partition portions 42 in sufficient thickness towards their
inner edges to allow extension of the assembly bores 44
therethrough, and to provide these portions in general with
adequate structural strength, the thickness at the inner partition
portion edges may be made substantially greater than that at the
outer edges for enhancing suction influence, as mentioned earlier.
Such inner edge proportioning is not of particular importance when
the honeycomb roll is to be used for drying because volume of flow
is more important than velocity for drying purposes, but when
extraction is involved velocity assumes primary importance and the
significance of substantially thicker inner partition edges in this
connection can be visualized best in relation to FIG. 4.
In FIG. 4, the partition portions 42 are represented in stylized
form with an inner edge thickness that is substantially equal to
the circumferential spacing therebetween, and a dotted line
representation is added at 12' of a suction slot equal in width to
the spacing width and defined by parallel walls having a thickness
equal to the inner edge thickness. The suction slot 12' should be
visualized as extending from a manifold arranged axially of the
roll in sufficient capacity to cause application of available
suction uniformly through slot 12' lengthwise of the roll.
With suction slot 12' stationary and annular member 14 rotating as
the roll is driven, the illustrated FIG. 4 condition will result in
applying the full force of the available suction momentarily at the
spacing between the involved partition portions 42. Continued roll
movement, however, will cause the involved partition portions 42 to
shift from the illustrated alignment so that the trailing partition
portion 42 begins to throttle the suction slot 12' and finally
progresses to the point of closing it. During this period, if a
level amount of power is expended in developing the available
suction, as is normally the case, the throttling and ultimate
closing of the suction slot 12' will cause a negative pressure
increase in the suction system. Then, as the previously trailing
partition portion 42 becomes the leading one and begins to open the
suction 12' at the next spacing, the available suction will be
progressively applied through this next spacing to reach the full
force condition again at alignment therewith, and such suction
application is repeated from spacing to spacing.
The result is a pulsating application of the available suction to
the material being handled at the roll surface, which is
particularly advantageous for extraction purposes, and which
employs the power devoted to maintaining suction to the best
advantage. The best advantage is obtained in the latter connection
because the dissipation or lessening of suction pressure that
necessarily occurs as the suction slot 12' reaches full alignment
at each partition portion spacing is, or can be, balanced by the
increase in suction pressure that occurs during throttling and
ultimate closing of suction slot 12' as such alignment is passed in
the course of the partition portion movement that progressively
brings the next spacing into alignment. Thus, the suction available
for application at each spacing is continually renewed as the roll
rotates for effective and efficient use of power input at a given
level.
Additionally, the pulsating application of suction that results has
the advantage of building the suction influence at each spacing to
a high velocity peak that induces excellent extraction action.
Basically, effective extraction or drying depends on drawing an
adequate mass per unit of time through the honeycomb structure for
the purpose at hand. In the case of drying, heat is employed to
cause the material being handled to give up contained moisture by
evaporation, so that the applied suction is required to do
substantially no more than move the released moisture away. But in
the case of extraction, the applied suction is the moisture
stripping agent, and this means that it must exert a physical
action on the material being handled sufficient to overcome in a
significant degree the physical forces tending to hold moisture in
wet material. Such physical action is obtained by applying the
suction at relatively high velocity, and it is obtained even more
effectively if the high velocity suction application is applied
suddenly or rapidly, and it is for this reason that the pulsating
application noted above is particularly advantageous.
It is not necessary that the partition portion inner edges and
suction slot 12' be related precisely as indicated in FIG. 4 in
order to obtain the pulsating advantage. In the exemplary design
mentioned earlier, the partition portions 42 were formed with inner
edges about 3/32 inch thick, with a resulting spacing therebetween
of about 3/16 inch, and the related suction slot 12' was formed
about 1/4 inch wide between walls about 1/8 inch thick, to provide
very satisfactory results. The necessary requirement is that the
partition portion inner edges have a thickness substantial enough
to provide for the pulsating suction application noted above.
It should also be mentioned that the particular nature of the
material to be handled can have an effect on the degree of suction
that is required or desired, as the type of material as well as the
character of the moisture with which it is wet can vary the
extraction action that is needed. For this reason, it may be
desirable in some cases to arrange the suction slot with a width
sufficient to draw simultaneously at more than one spacing, and in
others to provide more than one suction slot space to draw at
different spacings, but in any event the honeycomb roll of the
present invention is readily adaptable for such variations with all
of the described advantages.
The present invention has been described in detail above for
purposes of illustration only and is not intended to be limited by
this description or otherwise to exclude any variation or
equivalent arrangement that would be apparent from, or reasonably
suggested by, the foregoing disclosure to the skill of the art.
* * * * *