U.S. patent number 3,589,594 [Application Number 04/831,677] was granted by the patent office on 1971-06-29 for collapsible bag.
This patent grant is currently assigned to Svend Aage Fischlein. Invention is credited to Svend Fischlein, Peter Karpf, Jan K. Tragaardh.
United States Patent |
3,589,594 |
Fischlein , et al. |
June 29, 1971 |
COLLAPSIBLE BAG
Abstract
The invention provides a collapsible bag comprising a prismatic,
tubular body having hingedly connected wall panels so as to be
collapsible to flat condition, and hinged flaps at the ends of the
tube to constitute the bottom and the top of the bag, all parts
being kept in interlocking relationship by means of a carrying
strap introduced between the top flaps and the bottom flaps.
Inventors: |
Fischlein; Svend (Albertslund,
DK), Karpf; Peter (Borkerod, DK),
Tragaardh; Jan K. (Lyngby, DK) |
Assignee: |
Fischlein; Svend Aage
(Albertslund, DK)
|
Family
ID: |
26063335 |
Appl.
No.: |
04/831,677 |
Filed: |
June 9, 1969 |
Foreign Application Priority Data
Current U.S.
Class: |
383/18; D9/432;
229/117.25; 383/25; 383/99; 229/117.11; 229/144; 229/914;
383/29 |
Current CPC
Class: |
B65D
5/46016 (20130101); A45C 3/00 (20130101); Y10S
229/914 (20130101) |
Current International
Class: |
A45C
3/00 (20060101); B65D 5/46 (20060101); B65d
031/16 (); B65d 033/06 () |
Field of
Search: |
;229/37,52,54,53
;150/1.7,32,33,42,52 ;224/5,26 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Bockenek; David M.
Claims
We claim:
1. A foldable-flat bag comprising a cubical, tubular body including
alternate pairs of side and end wall panels hingedly connected at
lateral edges for forming a tubular body when erected:
rectangular lid and bottom closure flaps hingedly connected to
respective upper and lower marginal edges of said sidewall panels
for overlapping each other at their free edges when the bag is
erected and the lid or bottom is closed;
said closure flaps having lateral hinge margins coincident with the
lateral marginal edges of said sidewall panels therebeneath;
sleeve-forming channels comprising segments hingedly connected to
respective upper and lower marginal edges of said end wall
panels;
said sleeve-forming channels comprising pairs of segments hingedly
connected at one edge to the lateral hinge margins of said
rectangular lid and bottom closure flaps;
said pairs of segments converging at hinge lines bordering an
intermediate segment hinged to the respective upper and lower edges
of said end wall panels;
said segments forming a flat, open-ended channel when juxtaposed
and said lid or bottom closure flaps are in a closed position;
and
a strap threaded through said open-ended channels between said
juxtaposed segments.
2. The structure as claimed in claim 1, in which said pairs of
segments are triangular and said intermediate segment is
trapezoidal.
3. The structure as claimed in claim 1, wherein said strap is
threaded within said bag and along the inner surface of said end
walls, and said strap extending through said channels flanking the
bottom closure flap and being disposed exteriorly and juxtaposed
beneath said bottom closure flaps.
4. The structure as claimed in claim 1, in which the end wall
panels include a slot intermediate of the upper and lower marginal
edges, said strap being threaded through said slots.
5. The structure as claimed in claim 4, in which said strap extends
vertically on the outer surface on said end walls.
Description
This invention relates to collapsible bags provided with a carrying
strap which may be used as shoulder strap, for example.
Collapsible bags known heretofore are generally made of soft tissue
which may be rolled or folded up, and are permanently connected
with a carrying handle or strap. Such bags offer little protection
to the objects contained therein. Bags having stiff walls so as to
be capable of protecting their contents against shocks and external
pressure, are not collapsible.
Collapsible packaging containers made of corrugated paper board, or
the like, and having stiff walls and bottom, are known, but such
containers are not suited for use as handbags, i.e. because they
have no carrying handle or strap. Furthermore, once such containers
are folded up, the bottom thereof, at least, must be permanently
secured in its operative position in order to be able to carry the
load of the goods packed in the container, so that the latter is no
more collapsible.
Accordingly, it is an object of the present invention to provide a
bag having stiff walls and a carrying strap, but being nevertheless
easily collapsible when not in use.
Another object is to provide a collapsible bag having hingedly
connected stiff panels for constituting the walls, the bottom and
the lid thereof, and a strap for carrying the bag and locking the
bottom of the bag against bursting open under the action of the
weight of the object contained in the bag.
A further object is to provide a collapsible bag of the kind
described having a separate carrying strap which becomes
operatively connected with the body of the bag when the flaps or
panels constituting the bottom and the lid of the bag are folded in
to close the ends of the tubular body of the bag.
Still another object is to provide a collapsible bag with stiff
walls and bottom which is simple in construction and inexpensive to
make.
Other objects and advantages will appear as this specification
proceeds, reference being now had to the drawings, in which:
FIG. 1 illustrates a portion of a foldable blank for the bag of
this invention,
FIG. 2 is as top perspective view of the bag made from the blank of
FIG. 1 and provided with a strap,
FIG. 3 is a bottom perspective view of the same,
FIG. 4 illustrates a modified form of the blank shown in FIG. 1,
and
FIG. 5 is an end view of the bag made from the blank of FIG. 4.
The blank shown in FIG. 1 may be made of any suitable, stiff sheet
material which is made pliable at the folding lines discussed
hereinafter. Such materials are, for example, leather, plastic
sheets, paper board or like fibre material, especially if coated
with tissue. In the latter case, the various panels defined between
the folding lines of the blank may be made separately and be
hingedly connected with each other along the folding lines by means
of the tissue coating.
The blank shown in FIG. 1 is first folded along parallel folding
lines 3, 2 and 4 to constitute a prismatic tube having rectangular
wall panels 31, 32, 31a and 32a, the tube being closed along the
edge 1, e.g. through heat sealing in case of a blank of
heat-sealable material. The edge 1 will then constitute a folding
line of the tube. When collapsed to flat condition, the tube
comprises two equal portions defined between the folding lines 1
and 2 lying flat upon each other. Near each end, the tube is
provided with transverse folding lines 5, 6, 7, 8 and 9, 10, 11,
12, respectively defining flaps or panels 33, 34, 33a, 34a and 35,
36, 35a, 36a, respectively, for folding in to constitute a closure
at each end of the tubular body of the bag.
The flap or panel 33 defined between the folding lines 1, 3 and 5
(FIG. 1, upper left) is formed with a pair of additional folding
lines 13 and 14 starting at the point of intersection between the
folding lines 1, 5 and 3, 5, respectively, and extending under an
angle of 45.degree. with these folding lines. The flap 33 is formed
with a recess 21, the lateral edges of which meet the inclined
folding lines 13 and 14 at points spaced a distance which is
slightly greater than the width of the carrying strap described
hereinafter. Subject to this condition, the recess 21 may be formed
in any desired manner. In the example illustrated, the recess 21 is
shown as being trapezoid. Generally speaking, the area defined
between the inclined folding lines 13 and 14 should have a width at
right angles to the folding line 5 which is smaller than half the
length of the flap along the folding line 5, so that the folding
lines 13 and 14 do not intersect each other.
Similar folding lines 15, 16; 17, 18; and 19, 20, respectively, and
recesses 22, 23 and 24, respectively, are formed in the flaps or
panels 33a, 35 and 35a defined between the folding lines 2, 7, 4;
1, 9, 3 and 2, 11, 4, respectively.
When the flat, collapsed tube is to be used as a bag, it is folded
to rectangular section, and the flaps 34, 34a and 36, 36a are
folded in to constitute the lid and the bottom respectively, of the
bag, as shown in FIGS. 2 and 3, while the flaps 33, 33a and 35, 35a
remain in a projecting position. When folded along the inclined
folding lines 13--20, these flaps constitute closed channels or
guideways through which a carrying strap 25 is threaded. This strap
may take the form of an endless belt or loop, or it may be provided
with a buckle or clasp (not shown) for adjusting the length of the
strap. The strap may be placed in the body of the bag before or
after folding in of the top and bottom flaps 34, 34a and 36, 36a as
desired, but in any case it should be caused to extend through the
channels or guideways formed by the flaps 33, 33a and 35, 35a and
along the inside of the wall panels 31 and 31a.
Evidently, a portion of the strap 25 will extend from one end of
the bottom 36, 36a of the bag to the other (FIG. 3), and when the
strap is pulled away from the top side of the bag, the channels or
guideways formed by the flaps 35 and 35a are bent in towards the
outside of the bottom panels 36 and 36a. Now, when the objects to
be carried in the bag are introduced therein, after the top panels
34 and 34a have been flipped open, the weight of the objects is
transmitted through the bottom panels 36 and 36a to the flaps 35
and 35a and the strap 25. Thus, the bottom of the bag remains
closed, while the to thereof is easy to open.
Obviously, the strap 25 may be pulled in the opposite direction
relative to the body of the bag, so that the flaps 34, 34a
constitute the bottom and the flaps 36, 36a constitute the top of
the bag.
The blank shown in FIG. 4 in which like reference numerals denote
like parts, differs from that shown in FIG. 1 in that slots 27, 28,
29 and 30 are provided along part of the folding lines 5, 7, 9 and
11, respectively, through which slots the strap 25 may pass from
the inside of the flaps 33, 35 and 33a, 35a to the outside of the
wall panels 31 and 31a, respectively, as shown in FIG. 5. This
measure will assist in keeping the carrying strap 25 positioned
when the top of the bag is open.
It will be appreciated that, when the bag is carried in the strap
25, all parts are interlocked so as to insure complete stability of
the bag. However, as soon as the tension of the strap 25 is
relaxed, e.g. when placing the bag upon a table, the top of the bag
may be readily opened by lifting the flaps 34, 34a, or the bag may
be taken completely apart and collapsed to flat condition.
The width of the top and bottom flaps 34, 34a and 36, 36a at right
angles to their respective folding lines 6, 8, 10, 12 should be
greater than half the width of the wall panels 31, 31a, and smaller
than this width, so as to insure a suitable overlapping, as shown
in FIG. 2.
Referring to FIGS. 1 and 4, it will be observed that the lateral
margins of the lid flaps 34, 34a and bottom flaps 36, 36a are
coincident or coextensive with the lateral hinge margins 2--4.
Additionally, the end walls 31, 31a have hingedly connected to the
upper margins 5, 7 and bottom margins 9, 11 a series of polygonal
segments conveniently described as sleeve-forming channels which
are clearly illustrated in FIGS. 2 and 3 at 33a, for example. These
channels are formed when the cover or lid panels 34, 34a and 36,
36a are in juxtaposed relation as is clearly evident from FIG.
2.
The sleeve-forming channels comprise a pair of isosceles triangular
segments hingedly connected to the lateral margins of the
rectangular lid flaps, see FIGS. 1 and 4, and include lower hinge
margins at 13--20, each respectively comprising opposite sides of a
trapezoidal segment 33, 33a, and 35, 35a, respectively. These
trapezoidal segments have their longer base 5, 7, 9, and 11,
respectively, hingedly connected at the upper or lower ends of the
end walls 31, 31a.
* * * * *