U.S. patent application number 09/761722 was filed with the patent office on 2001-07-19 for resealable sack or bag.
Invention is credited to Tetenborg, Konrad.
Application Number | 20010008566 09/761722 |
Document ID | / |
Family ID | 7627825 |
Filed Date | 2001-07-19 |
United States Patent
Application |
20010008566 |
Kind Code |
A1 |
Tetenborg, Konrad |
July 19, 2001 |
Resealable Sack or bag
Abstract
A sack or bag is made of a collapsed, thermoplastic tubular film
segment, which is provided preferably with side folds, by affixing
head and foot welds and is provided on at least its head side with
corner-partitioning corner welds. In order to be able to reseal
such a sack after a partial quantity has been removed from its
filling, the corners are provided in such a manner with cutouts,
starting from the face-sided cutting edge, that the results are
side strips, whose outer ends are provided with redetachable
connecting means and that are designed so long that they can be
folded in the outward direction by folding diagonally over the side
edges of the sack or bag. After formation of a sack-sealing roll,
the connecting means can be connected together for the purpose of
fixing the roll in position.
Inventors: |
Tetenborg, Konrad;
(Lengerich, DE) |
Correspondence
Address: |
JACOBSON HOLMAN PLLC
400 SEVENTH STREET N.W.
SUITE 600
WASHINGTON
DC
20004
US
|
Family ID: |
7627825 |
Appl. No.: |
09/761722 |
Filed: |
January 18, 2001 |
Current U.S.
Class: |
383/7 |
Current CPC
Class: |
B65D 33/14 20130101;
B65D 2313/02 20130101 |
Class at
Publication: |
383/7 |
International
Class: |
B65D 033/10 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 18, 2000 |
DE |
100 01 824.6 |
Claims
1. Resealable sack or bag, which is made of a collapsed,
thermoplastic tubular film segment, which is provided preferably
with side folds, is provided with corner-partitioning corner welds
(2) by affixing head and foot welds (6), characterized in that the
corners are provided in such a manner with cutouts, starting from
the face-sided cutting edge (5), that the results are side strips
(8), which form preferably handle straps and whose outer ends are
provided with redetachable connecting means and that are designed
so long that they can be folded in the outward direction by folding
diagonally beyond the side edges (3) of the sack or bag (1).
2. Sack or bag, as claimed in claim 1, characterized in that the
redetachable connecting means comprise Velcro fasteners (9),
permanently tacky remaining layers, snap fasteners or strings.
Description
[0001] The invention relates to a resealable sack or bag, which is
made of a collapsed, thermoplastic tubular film segment, which is
provided preferably with side folds, by affixing head and foot
welds and is provided on at least its head side with
corner-partitioning corner welds.
[0002] Such sacks or bags exist; and hence there is no need to
describe them in detail. If the sacks or bags have been made from
tubular segments provided with side folds, they assume an
essentially square shape after they have been filled. Such sacks or
bags are often used to package and store bulk materials, of which
only a partial quantity is removed after the sack has been opened
so that there is the problem of resealing the sacks or bags until
the next partial quantity is removed.
[0003] Therefore, the object of the invention is to provide a sack
or bag of the class described in the introductory part that is
economical to produce and can be resealed in an easy to handle
manner once the bag or sack has been opened.
[0004] The invention solves this problem in that the corners are
provided in such a manner with cutouts, starting from the
face-sided cutting edge, that the results are side strips, which
form preferably handle straps and whose outer ends are provided
with redetachable connecting means and that are designed so long
that they can be folded in the outward direction by folding
diagonally beyond the side edges of the sack or bag.
[0005] Sacks or bags of the class described in the introductory
part are usually opened by severing the head weld, sealing the
sack, with a cut parallel to said head weld. If a partial quantity
is removed from such an opened sack or bag, the side walls and
optionally the side folds of the bag can be laid flat until said
bag is filled and then closed by rolling up. After forming this
roll, however, it must be fixed in position in order to prevent it
from an undesired unrolling, a feature that is usually solved with
adhesive strips or clamps. In the case of the sack or bag,
according to the invention, the rolled up opening side can be bent
or curled around the central axis of the sack or bag so that the
strips, which are provided with the redetachable connecting means
and which project laterally beyond the rolled up opening side of
the bag, can be connected together so that the roll, sealing the
bag, is fixed in position.
[0006] Expediently the redetachable connecting means comprise
Velcro fasteners, permanently tacky remaining layers, snap
fasteners or strings.
[0007] If permanently tacky remaining layers are provided, they are
preferably covered with peelable layers up until the time they are
first connected together.
[0008] If the connecting means comprise strings, the strips,
connected to them, do not have to project beyond the roll, sealing
the sack, because a seal can be achieved by merely knotting the
strings. If the seal is accomplished with the use of strings, they
do not have to be connected to the strips, but rather it suffices
to connect them to one side of the sack or bag.
[0009] One embodiment of the invention is explained in detail below
with reference to the drawings.
[0010] FIG. 1 depicts the opening side of a side fold sack of the
invention in the collapsed state.
[0011] FIG. 2 depicts the sack, according to FIG. 1, after it has
been opened, and schematically indicated fill states and outwardly
folded strips, serving to fix into position the roll, sealing the
sack; and
[0012] FIG. 3 is a side view of the sack, according to FIGS. 1 and
2, after removal of a partial quantity of its filling in the
resealed state.
[0013] The resealable side fold sack, depicted in the drawings, is
made of a thermoplastic tubular film segment, which is provided
with side folds, and which is provided (in a manner that is not
illustrated in detail) with a bottom and on the head side with
corner-partitioning corner welds 2, which run at a 45.degree. angle
relative to the side edges 3 and seize only one of the two side
folds, and hence are not connected together. The corner welds 2
terminate in front of the inside folding edges 4 of the side folds.
They run at approximately right angles into the upper cutting edges
5 of the tubular segments so that it is guaranteed that the
sack-sealing head welds 6 cross the corner welds in the illustrated
manner. The head welds 6 are also designed continuous through the
corners, partitioned off by the corner welds 2. The corners,
provided with the head welds 6, are provided in the illustrated
manner with cutouts 7, which separate the peripheral strips 8,
which extend freely from the corners.
[0014] These peripheral strips 8 can be used as handle straps,
since they are connected together on the head side and can be
grasped from the side.
[0015] In the region of their upper ends the peripheral strips 8
are connected to strips 9, made of Velcro fasteners.
[0016] FIG. 2 depicts the sack, according to FIG. 1, in various
fill states, and for the sake of a better overview in the collapsed
state, even though the sack assumes, of course, a different, namely
square shape in its filled state. To open said sack, the upper
part, provided with the sealing weld 6, is severed from the sack in
the manner, apparent from FIG. 2. After the sack has been opened,
the sack exhibits an upper fill state 11. After a partial quantity
of the material 10 has been removed, the fill state in the sack
drops to the level 12. The upper sack end that has become free
thereby can now be rolled up in the conventional manner for the
purpose of sealing. Prior to rolling up, the strips, bearing the
Velcro fasteners 9, are folded in the outward direction at an angle
of about 45.degree. so that the Velcro fastener strips project
beyond the outer edges of the sack 3. If the sack seal is formed by
rolling up the sack end, the sack-sealing roll 13 can be united in
the shape of a ring by curling or bending around the central axis
of the sack in such a manner that the Velcro fasteners 9 can be
attached to each other in order to secure the rolling up that seals
the sack.
* * * * *