U.S. patent number 3,712,305 [Application Number 05/149,155] was granted by the patent office on 1973-01-23 for tampon for taking up menstrual liquids.
This patent grant is currently assigned to Svenska Cellulosa Aktiebolaget. Invention is credited to Ivar Lindgren, Anna Britt Udden, Per Edward Carl Udden, Bengt Axel Wennerblom.
United States Patent |
3,712,305 |
Wennerblom , et al. |
January 23, 1973 |
TAMPON FOR TAKING UP MENSTRUAL LIQUIDS
Abstract
A tampon is disclosed for taking up menstrual fluids having as
the main portion thereof a dry folded sheet material which is muff-
or hose-shaped. The tampon is constricted and pulling means are
attached at the point of constriction. The sheet material has an
inner layer of absorbent fibrous material with relatively weak
internal cohesion. A thin cover layer with relatively strong
internal cohesion is used to prevent release of inner layer fibers.
The configuration aids in insertion and the materials give good
characteristics during use.
Inventors: |
Wennerblom; Bengt Axel
(Sundsvall, SW), Udden; Per Edward Carl (Timra,
SW), Udden; Anna Britt (Timra, SW),
Lindgren; Ivar (Sorberge, SW) |
Assignee: |
Svenska Cellulosa Aktiebolaget
(Sundsvall, SW)
|
Family
ID: |
20272132 |
Appl.
No.: |
05/149,155 |
Filed: |
June 2, 1971 |
Foreign Application Priority Data
Current U.S.
Class: |
604/385.18;
604/904; 604/375 |
Current CPC
Class: |
A61F
13/2051 (20130101); Y10S 604/904 (20130101) |
Current International
Class: |
A61F
13/20 (20060101); A61f 013/20 () |
Field of
Search: |
;128/285,270 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
324,880 |
|
Oct 1957 |
|
CH |
|
654,687 |
|
Apr 1929 |
|
FR |
|
Primary Examiner: Rosenbaum; Charles F.
Claims
What we claim is:
1. A tampon for taking up menstrual fluids comprising
in at least the main portion thereof a sheet material which is
folded over in the dry state before use thereof and at least
partially compressed so as to exhibit a cross-sectional shape
suitable for facilitating the insertion of said tampon into
vagina
wherein said tampon is muff- or hose-shaped in its uncompressed
state and constricted and connected at the place of constriction
with tampon-pulling means
said sheet material comprising a thick inner layer of
liquid-absorbent fibrous material having relatively weak internal
cohesion,
said inner layer being coated at the inner surface and outer
surface thereof with a thin fibrous layer having a relatively
strong internal cohesion and capable of preventing the release of
fibers from said inner layer.
2. The tampon of claim 11 wherein one portion of said hose-shaped
thin fibrous layer covers the outer surface of the hose-shaped
absorbent inner layer and
wherein another portion of the thin fibrous layer is turned into
the hose-shaped absorbent inner layer so as to cover the inner
surface of the latter layer.
3. A tampon as claimed in claim 1, characterized in that the
hose-shaped material by said constriction has been imparted
substantially the shape of an open bag.
4. A tampon as claimed in claim 1, characterized in that the ratio
of its cross-sectional maximum dimension (B) in one direction to
its cross-sectional maximum dimension (T) in a direction
perpendicular to said one direction is at least about 3:1.
5. A tampon as claimed in claim 4, characterized in that the ratio
of its cross-sectional maximum dimension (B) in one direction to
its cross-sectional maximum dimension (T) in a direction
perpendicular to said one direction is at least about 4:1.
6. A tampon as claimed in claim 1, characterized in that, in its
dry position, it is compressed over a limited area or zone at the
middle portion of the tampon while leaving edge portions which are
non-compressed or merely slightly compressed.
7. A tampon as claimed in claim 1, characterized in that the muff-
or hose-shaped material in its cylindrical form has an outer
diameter of at least 20 mm, preferably at least 30 mm, for instance
about 40 mm.
8. A tampon as claimed in claim 1, characterized in that the
sheet-material in its non-compacted condition has an average
thickness of at least 2 mm, preferably at least 3 mm, for instance
4 to 5 mm.
9. A tampon as claimed in claim 8, characterized in that the
hose-shaped sheet-material, at two cross-sectionally opposite
locations, is folded over twice, first in one sense and then in the
opposite sense, and in which substantially only the double-folded
portions of the sheet-material, which portions are narrow as
compared to the width of the final tampon, are compacted against
each other for keeping together the tampon in its cross-sectionally
substantially oblong or rectangular shape.
10. A tampon as claimed in claim 1, characterized in that the
hose-shaped material, at two cross-sectionally opposite locations,
is folded over inward towards the center of the tampon so as to
cause the two folded-in portions at either sides to be covered by a
single layer of the sheet-material.
11. A tampon as claimed in claim 1, characterized in that, in its
dry condition, it is compressed over a limited area or zone
extending along the two edges of the tampon and while leaving
central portions uncompressed or only slightly compressed.
12. A tampon as claimed in claim 1, characterized in that said
thinner fibrous layer consists of a material, which, possibly with
mutually overlapping longitudinal edge portions, is formed into a
hose, the two hose ends being constricted and connected with
respective strings, or a string in common for the two hose ends,
and serving to facilitate removal of the tampon after use.
13. A tampon as claimed in claim 1, characterized in that it
consists of a hose-like portion of a liquid-absorbent material
which portion approximately at its center is constricted to form
two bag-like parts.
Description
The present invention relates to tampons for taking up, i.e. for
absorbing or collecting, menstrual liquids, which tampons are
composed mainly of a liquid-absorbent material preferably a fibrous
material.
It has been proposed before, in order to facilitate introduction of
the dry tampon into vagina, by the aid of certain facilities to
constrict the fibrous material in a more or less compacted
condition, thereby causing the cross-sectional area of the tampon
in its constricted condition to be substantially smaller than its
cross-sectional area after introducing the tampon into vagina,
where the liquid-absorbent material can and should expand to
thereby increase the absorption power thereof. In this instance the
dry tampon has been constricted in such a way as to impart to it an
essentially round or square cross-sectional shape. It is necessary,
when introducing a tampon of this prior-art construction, since the
vaginal opening has the configuration of a cleft and is closed
laterally by musculature at the pelvis bottom, to overcome a
non-insignificant reaction pressure from this musculature, which
means increased frictional resistance. This is felt uncomfortable
by many women. This fact, will set a practical limit to the size of
the cross-sectional area of the dry tampon, and thus to the
quantity of absorbent material pro unit length of the tampon which
can be contained therein. Already with presently commercially
available tampons this drawback is so great that certain
manufacturers recommend application of vaseline to the tampon
which, however, will of course deteriorate the absorption power of
the tampon.
Another drawback of most prior-art tampons resides in that the
absorbent material fills the entire cross section of the vagina
even after the tampon has been introduced to its active position in
the vagina and has been allowed to expand therein. This will limit
the capability of the tampon of rapidly absorbing or collecting
menstrual liquids, this drawback being particularly noticeable when
larger amounts of menstrual liquids are discharged suddenly from
the uterus.
The present invention has for its object to remedy the
above-mentioned drawbacks and to provide a tampon exhibiting new
and advantageous properties as regards its handling as well as its
function when in its active position.
In a tampon according to the invention at least the main portion
thereof consists of a liquid absorptive material, preferably a
fibrous material, and the tampon is characterized in that it
comprises a portion of a liquid absorptive material which is
sleeve- or hose-shaped when in uncompressed or non-compacted
condition and which is constricted and connected at the place of
constriction with a means for pulling out the tampon, the tampon,
in its dry condition before use, being folded over and at least
partly compressed or compacted so as to exhibit a cross-sectional
shape, preferably a substantially oval or rectangular shape, which
is suitable for facilitating insertion of the tampon into vagina.
By the expression "substantially oval or rectangular" in
cross-sectional shape is generally to be understood that the cross
section of the dry tampon in one direction has a largest dimension
or extension which is essentially larger than the largest dimension
or extension of the cross section in a direction perpendicular to
said one direction. Desirably, the ratio of the two mutually
perpendicular maximum dimensions should be at least about 2:1,
preferably at least about 3:1, for instance about 4:1.
According to one embodiment of the invention, the tampon is
composed of at least one liquid-absorbent sheet-material which, in
the dry condition of the tampon, is folded over at one or more
localities about axes extending in substantially parallel relation
to the longitudinal direction of the tampon, and which, in its
folded-over condition, is kept together in such a way that the
tampon exhibits a substantially oval or rectangular cross section,
as defined hereabove. In this case, the mutually contacting
portions or folds of the sheet-material may be non-interconnected,
or they may be interconnected by binding joints which are readily
dissoluble in a moist environment and which joints may be realized
by crimping the tampon together at said portions or folds.
In a preferred embodiment of the invention, the tampon is so
designed, that, in its position of use and after the keeping
together, if any, of the sheet material has ceased, the tampon can
expand while forming at least one internal cavity which may be open
towards the mouth of uterus and may be adapted to receive menstrual
liquid and to facilitate absorption of such liquid by said sheet
material.
The tampon may be formed, mainly at least, of a sheet-material in
the form of a short hose or bag which in its circular-cylindrical
shape should have an external diameter of at least 20 mm,
preferably at least 30 mm, so as to enable the same to fill out the
vaginal cross section completely, the internal cavity of the hose
or bag being capable of receiving a substantial quantity of
menstrual liquids.
Said sheet-material, according to the invention, could suitably
comprise a relatively thick inner layer of liquid absorptive
material having a relatively weak internal cohesion and coated at
the outer surface, at least, of the tampon, by a thin fibrous layer
having a relatively strong internal cohesion and being capable of
preventing any release of fibers from the inner layer. Where the
latter is in the form of a hose or bag, the thin fibrous layer is
suitably arranged so as also to cover the inner surface of the hose
or bag, in which case said thin fibrous layer may suitably be in
the form of a hose in part turned inside out. This hose in the
final condition of the tampon, may be contracted at its ends, in
which case the two ends may be closed in common by a string, or by
individual string ends, suitably of a common string. The function
of this string is the well-known one, viz. to facilitate withdrawal
of the tampon after use. The above-mentioned embodiment in which
the ends of the hose in part turned inside out are closed by
individual string ends is the preferable one, since in this case
double safety will be obtained when withdrawing the tampon.
The invention will now be described more in detail with reference
to the accompanying drawings, illustrating some embodiments of the
tampon according to the invention, as well as of methods and
material for producing the tampon, and in which:
FIGS. 1(a to c) in plane view, in side view and in cross-sectional
view, respectively, illustrate a tampon according to a first
embodiment of the invention;
FIGS. 2( a to c) similarly illustrate a second embodiment;
FIGS. 3( a to c) and FIGS. 4 (a to c) similarly illustrate
variations of the tampon of FIGS. 2;
FIGS. 5( a, b) and 6(a, b) in plane view and side view,
respectively, illustrate further embodiments;
FIG. 7 in perspective view shows an embodiment in which the tampon
is produced by double-folding a hose- or bag-shaped blank;
FIG. 8 in cross section illustrates the embodiment of FIG. 7 in its
final condition;
FIG. 9 in longitudinal section illustrates a hose-shaped and in
part inside-out-turned surface cover for a tampon according to the
invention;
FIG. 10 shows an embodiment somewhat similar to that of FIG. 7 and
provided with a ring-shaped spring member for expanding the
tampon;
FIGS. 11, 12 and 13 illustrates an inventive method of producing a
tampon;
FIG. 14 in cross section illustrates a compacted tampon as produced
by using a special folding procedure;
FIG. 15 shows an embodiment of a tampon comprising two integral,
sleeve-like main portions; and
FIGS. 16 and 17 in cross section illustrate the compacted tampon of
FIG. 15 as produced by the use of two different folding procedures,
respectively.
Referring now more specifically to FIGS. 1 (a to c), the embodiment
of a tampon 1 illustrated therein is made of a liquid absorbent
sheet-material which is suitably covered by a thin protecting
layer, as will be described more in detail hereinafter. The tampon
is shown in its dry condition before use and has been imparted by a
compacting operation, with a generally flattened shape. The length
of the tampon is designated by L, its width by B and its thickness
by T. The ratio of of B to T, according to the invention, should be
at least 2:1, preferably at least 3:1 and suitably is about 4:1.
Owing to its flattened shape, introduction of the tampon into the
slot-shaped vaginal opening is facilitated. The compacting
operation may be carried out at a reduced pressure so as not to
cause excessive compression of the absorbent material, but enabling
relatively rapid expansion of the latter after the tampon has been
introduced into the moist environment within vagina.
FIGS. 2 (a to c) illustrate a tampon 2 substantially similar to
that of FIGS. 1(a to c). The tampon in its connected condition
consists of two or more superposed layers or sheets of the
absorbent material, which may suitably be integrally connected with
each other at one longitudinal edge or at both longitudinal edges
of the tampon. The compaction, however, should be sufficient to
keep the layers or sheets together in the compressed condition,
preferably without the use of any particular adhesive. By properly
controlling the compacting force, however, the adhesion between the
layers will be sufficiently weak to enable the same to be rapidly
released in the moist environment within the vagina, whereby the
layers will separate from each other. This will increase the rate
of collection of menstrual liquids by the tampon by enabling rapid
absorption of such liquids within the layers. The tampon, as will
be further described in connection with FIG. 13, may be produced by
rolling up an absorptive sheet-material onto a mandrel and
providing the same with a hose-shaped cover which is connected at
both ends with pull-out strings, after which the ends of the tampon
are closed and the tampon cover is turned partly inside out into
the tampon. FIGS. 3 (a to c) and 4 (a to c) illustrate how it is
possible, in order to keep the dry tampon together, to compact the
latter over a limited central area 7' or over a longitudinal
central zone 7" with a limited extension in width, whereby the
absorbent material of portions 8' or 8", respectively, outside such
area or zone will remain noncompacted or slightly compacted,
thereby enabling them more rapidly to be rendered effective to
absorb menstrual liquids after the tampon has been inserted.
FIG. 5(a and b) shows how the compaction of the tampon for keeping
it together can be effected along a limited portion of the length
of the tampon, so as to lease at the leading end of the tampon a
non-compacted or slightly compacted portion 8'". This will soften
the leading end of the tampon, making the introduction of the
tampon into the vaginal opening more lenient. The same effect may
be provided in the embodiment of FIG. 3 (a to c). FIG. 6(a and b)
shows a combination of the embodiments of FIGS. 4 (a to c) and 5 (a
and b).
As seen in plan view in FIGS. 2a, 3a, 4a, 5a and 6a, the area of
the compacted portion of the tampon may be equal to, or larger
than, the area of the non-compacted or merely slightly compacted
portion thereof.
The compaction of the tampon as described hereabove has for its
main purpose to reduce the cross-sectional area of the tampon so as
to facilitate insertion of the tampon, or rather, to enable the use
of as large an amount of absorbent material as possible within a
predetermined cross-sectional area. The compaction, however, has
also for its purpose to stiffen the tampon so that it will not
collapse or otherwise become deformed during the insertion
thereof.
In the embodiment of FIGS. 7 and 8, the tampon is made of a
hose-shaped absorbent sheet-material. In this connection it may be
pointed out that the embodiments of FIGS. 1 to 5 could also be made
of such hose-shaped material, if desired. To produce a tampon
according to FIGS. 7 and 8, the hose-shaped material is formed with
double-bent or folded-in portions 10 and 11, respectively, at
mutually opposite locations of the hose 9. FIGS. 7 illustrates how
such folding operation is initiated, and FIG. 8 shows the final
result after completing the double-folding operation and compacting
the folded-in portions against one another for keeping the tampon
together.
As appears from FIG. 8, the double-folded portions 10 and 11 are
more heavily compacted whereas the portions 12 and 13 of the
hose-shaped material 9 at either sides of the double-folds are
non-compacted or merely slightly compacted. The compaction of the
portions 10 and 11 extending longitudinally of the tampon inparts
sufficient stiffness to the latter. The compaction, however, should
be carried out at a moderate pressure in order, in the position of
use of the tampon, to enable a relatively easy expension of its
portions 10 and 11 while absorbing liquids, and to enable them to
separate from each other and to unfold, whereby the tampon, while
adapting itself to the vaginal space, will form an internal cavity
within the tampon. Owing to the presence of such cavity, the
pressure of the tampon against the vaginal walls will be reduced to
a comfortably low value.
Owing to the portions 12 and 13 of the tampon according to FIGS. 7
and 8 being non-compacted or only slightly compacted, the
longitudinal edges of the tampon will remain soft, enabling a
lenient insertion of the tampon. Said portions, in addition, will
be capable of rapidly absorbing liquid immediately upon
introduction of the tampon.
FIG. 9 illustrates the tampon in its condition before folding or
after expansion thereof. The internal cavity 14 is open at the end
of the tampon intended to face the mouth of uterus, whereas the
same is substantially closed at the opposite end of the tampon. The
absorptive material layer 15 is coated by a protective layer 17
comprising an external portion 18 covering the outer surface of the
material 15 and an internal portion 19 covering the inner surface
of said material. The portions 18 and 19 integrally join each other
at the upper end edge 16 of the tampon and suitably consist of one
integral, hose-shaped piece of material which is capable of
preventing any relasing of fibers from the absorbent layer 15. The
hose-shaped protective layer is constricted at one end 20 as close
to the bottom portion of the hose-shaped absorbent material 15 as
possible, and the protective layer is also constricted at its other
end 21, which other end has been moved down into the tampon by
turning the hose 17 half inside out. Tied to the hose ends 20 and
21 are strings 22 and 23, respectively, the string 23 being
threaded out through the tampon bottom and hose end 20. The strings
22 and 23 serve for facilitating withdrawal of the tampon. By
providing the tampon with two strings attached at individual points
of the tampon, increased safety will be obtained that the tampon
will indeed follow when pulling the strings, since there will be
relatively small probability of loosening of both string
attachments. According to the method thus described, a central
attachment of the pullout string of the tampon is obtained which,
owing to the attachment points of both string ends being disposed
relatively close to one another, will prevent folding of the tampon
during its removal, since the pulling forces required for
withdrawal of the tampon will be taken up along the axial center
line of the tampon. The attachment of the strings 22 and 23 to the
hose ends 20 and 21 may be made in various ways, such as by tying
by an adhesive, by a small thermoplastical attachment member which
is heated to softening temperature for fastening the same, or in
any suitable other way.
FIG. 10 illustrates an embodiment of the tampon according to the
invention, in which the tampon is formed from a hose-shaped
material and has fastened to its upper edge a ring 25 of an
elastically resilient material, such as thermoplastic, for example.
This ring has for its purpose after insertion of the tampon to
enhance the opening movement of the tampon and to keep the tampon
open in its active position so that the volume of the internal
cavity 14 of the tampon will be as large as possible, which will be
the case if the ring in its expanded condition is substantially
round.
FIGS. 11 and 12 illustrates a method of producing material for a
tampon according to the invention. Applied onto an endless belt 31
or web forming wire which may be moved for instance in the
direction indicated by the arrow P, is a material 32 intended to
serve as a protective layer 17 for the tampon shown in FIG. 9. When
applying the material 32 to the belt, the material is formed with
double-folded portions 33 at regular intervals along the belt, the
folding taking place about axes extending perpendicularly to the
direction of advance P of the belt. Thereafter a loose absorbent
material 34 is applied as a continuous layer or cover onto the thin
material layer 32 over a zone 35 thereof, the width F of which is
less than half the overall width E of the material 32. Along one
lateral edge of the covered zone 35 a narrow uncovered zone 36 is
provided, and to the right of zone 35 there is a wide uncovered
zone 37 of the material 32. After the covering operation, the
covered material is subjected to a controlled tension in its
longitudinal direction, whereby the folded portions 33 of the
material 32 will unfold while pulling the layer of absorbent
material superposed thereover apart, thus causing the absorbent
material thereafter merely to cover a plurality of relatively
spaced areas. Then the material 32 is cut off perpendicularly to
the longitudinal direction at the locations of the previous double
folds, and a tampon is made in a manner to be described in detail
in connection with FIG. 13. If the relatively separated areas
covered by absorbent material are of sufficient length to enable
two tampons to be formed thereof, then the covered material will
additionally be cut off centrally intermediate said locations of
the previous double folds of the material 32.
FIG. 13 illustrates a suitable tool for forming a tampon according
to the invention, said tool being in the form of a hollow mandrel
41. Applied around the mandrel is, for example, one piece of the
covered material 32 as separated in the manner just described and
with its absorbent material 34 engaging the peripheral surface of
the mandrel. In effect, the material 34 will then cover the entire
periphery of the mandrel, whereas the material 32 which, in the
peripheral direction, is longer than the material 34 by an amount
corresponding to the unfolded length of the double folds 33, will
coat the periphery of the mandrel with a corresponding overlap
which is sufficient to keep the material 32 together in the
peripheral direction. Thereafter, the material 32 is constricted at
the free end of the non -covered zone 37, and a string 23 is
attached to the constriction 21 and is threaded back through the
central bore of the mandrel. Upon pulling the string 23, the
portion of the material 32 corresponding to the zone 37 will be
moved into the mandrel. Finally, the material thus composed is
withdrawn from the mandrel, and the material 32 is constricted at
its portion corresponding to the zone 36 so as to form a second
constriction corresponding to that designated by 20 in FIG. 9.
Although the method thus described for producing a tampon according
to the invention has many advantages the tampon, of course, could
be formed by several other methods.
A tampon according to the invention, as mentioned hereinbefore, in
its dry and compressed condition is essentially flat and
substantially has the shape of a parallelepiped with rounded edges,
and its dimensions may be as follows:
Length (L) =40 to 80 mm Width (B) =15 to 40 mm Thickness (T) =3 to
15 mm
Insofar as the tampon is made of a hose-shaped material, as shown,
for example, in FIGS. 7 to 10, the outer diameter of the hose in
its cylindrical form may be 15 to 40 mm. The thickness of the layer
of liquid absorptive material of the hose wall may be 2 to 6
mm.
As regards the material from which the tampon according to the
invention should suitably be formed, the following points of view
may be given:
The absorptive material may be of the same kind as that employed in
conventional tampons, such as compacted, long-fiber type rayon,
dry-defibrated cellulose pulp, cotton fibers and/or any other
fibrous material exhibiting a good absorption capacity.
The protective cover or protective layer of the tampon may consist
of non-woven fabric having, for instance, a base weight of about 15
g/m.sup.2 and completely enclosing the tampon with the major
portion of its fibers extending substantially in the longitudinal
direction of the tampon to ensure sufficient tensile strength of
the tampon upon pulling out the same after use. The protective
cover could also consist, for instance, of a thin woven textile
material or of a soft, wet-strong and porous sheet-material. It is
preferred, however, to use the non-woven type textile material
which should cover the tampon completely, both outwardly and
inwardly, as described. The principal advantage of a tampon which
is completely enclosed by a protective cover resides in that no
loose filaments or fiber bundles can remain in vagina upon removing
the tampon.
Further owing to the presence of this closed cover, which can, of
course, be tightly closed also in the longitudinal direction of the
tampon, it will be possible to predetermine the expansion of the
tampon due to liquid absorption both longitudinally and
circumferentially, so as thereby to attain optimum characteristics
of the tampon in use and upon removal thereof after use.
FIG. 14 shows in cross section a compacted tampon according to the
invention, and in which a sleeve-like material as that of FIG. 9 is
at two opposite positions folded inward towards the center of the
tampon where the folded-in portions or folds 43 and 44 meet. Within
the compacted tampon the inturned folds will be positioned between
two single layers of the absorbent sheet-material, as will be seen
from the FIGURE.
FIG. 15 is a perspective view of a non-compacted tampon according
to a still further embodiment of the invention. This embodiment
comprises two sleeve-like portions 51 and 52 formed from one single
hose-shaped blank and constricted at a position 55 where they are
integrally connected. The sleeve-like portions 51 and 52 at their
extreme ends have openings 53 and 54, respectively, to
corresponding internal cavities. At its constriction 55 the tampon
is provided with a pull string 56. The tampon shown in FIG. 15, in
certain cases, may preferable before that shown in FIG. 9. Thus,
for instance, it may be better adaptable to the femal sexual organ
upon withdrawal of the tampon therefrom, owing to the fact that, on
this occasion, it will more readily take up a flat shape thereby
enabling the same more easily to have imparted to it a turning
movement or twist of a kind required at the passage thereof from
vagina to the vaginal entrance to make the withdrawal comfortable
at these passages which, as seen in cross section, have the general
shape of slots extending at an angle to each other.
FIGS. 16 and 17 illustrate two alternative methods of folding and
compacting a tampon according to FIG. 15. In these FIGURES which
illustrate the tampon in cross-section, FIG. 16 shows how the
tampon can be compacted without any folding in the portions of the
hose-shaped portions 51 and 52, while FIG. 17 illustrates
compacting after folding in said portions in accordance with the
exposure of FIG. 3, for example.
The invention is not restricted to the embodiments as described and
illustrated by way of example, since these are susceptible or
different variations and modifications without any departure from
the scope of the invention.
* * * * *