U.S. patent application number 12/652236 was filed with the patent office on 2011-07-07 for plastic bag with reinforced sides.
Invention is credited to YI-MIN CHEN.
Application Number | 20110164836 12/652236 |
Document ID | / |
Family ID | 44224732 |
Filed Date | 2011-07-07 |
United States Patent
Application |
20110164836 |
Kind Code |
A1 |
CHEN; YI-MIN |
July 7, 2011 |
PLASTIC BAG WITH REINFORCED SIDES
Abstract
A plastic bag includes a body having overlapped first and second
layers. The overlapped first and second layers define a receiving
space. The body further includes two sides respectively having a
first corrugated portion and a second corrugated portion. Each of
the first and second corrugated portions includes a layer unit
having eight layer sections. Each of the eight layer sections is a
portion of one of the first and second layers.
Inventors: |
CHEN; YI-MIN; (KAOHSIUNG
CITY, TW) |
Family ID: |
44224732 |
Appl. No.: |
12/652236 |
Filed: |
January 5, 2010 |
Current U.S.
Class: |
383/109 ;
383/119 |
Current CPC
Class: |
B65D 33/02 20130101;
B65D 33/065 20130101 |
Class at
Publication: |
383/109 ;
383/119 |
International
Class: |
B65D 30/08 20060101
B65D030/08; B65D 33/02 20060101 B65D033/02 |
Claims
1. A plastic bag comprising: a body including overlapped first and
second layers, with the overlapped first and second layers defining
a receiving space, with the body further including two sides
respectively having a first corrugated portion and a second
corrugated portion, with each of the first and second corrugated
portions including a layer unit having eight layer sections, with
each of the eight layer sections being a portion of one of the
first and second layers.
2. The plastic bag as claimed in claim 1, with the body further
including a bottom, and with the layer unit of each of the first
and second corrugated portions joined to the bottom of the body by
pressing.
3. The plastic bag as claimed in claim 1, with the body further
including a third layer overlapping the overlapped first and second
layers, with the overlapped first, second, and third layers
defining the receiving space, and with the third layer forming
additional four layer sections in each of the first and second
corrugated portions.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to a plastic bag and, more
particularly, to a plastic bag with reinforced sides by corrugated
portions.
[0002] Plastic bags are widely used in daily lives for various
purposes including receiving articles, garbage, etc. The structural
strength of plastic bags is often limited by their material in view
of costs and, thus, has a limited load capacity. Although
officially discouraged from the environmental and ecological
aspects, use of plastic bags for carrying articles is
inevitable.
[0003] FIG. 5 shows a conventional so-called T-shaped plastic bag 2
having a body 20 and two handles 21 extending upward from two ends
of a top of the body 20, presenting a shape similar to a T-shirt.
Each of two sides of the plastic bag 2 has a corrugated portion 22
extending inward and interconnected to one of the handles 21 and to
a bottom of the body 20. The load imparted from the articles
received in the plastic bag 2 to the bottom of the body 20 can be
distributed to the corrugated portions 22. Each corrugated portion
22 generally includes a recessed section 221 formed in one of the
sides of the body 20 and having a two-layer structure (a single
fold). Thus, the body 20 has four layers including the recessed
section 221. However, the load capacity of the plastic bag 2 is
still limited, for the structural strength of the recessed section
221 having a single fold is not high enough.
[0004] Thus, a need exists for a plastic bag with reinforced sides
for supporting purposes.
BRIEF SUMMARY OF THE INVENTION
[0005] The present invention solves this need and other problems in
the field of plastic bag structure by providing, in a preferred
form, a plastic bag including a body having overlapped first and
second layers. The overlapped first and second layers define a
receiving space. The body further includes two sides respectively
having a first corrugated portion and a second corrugated portion.
Each of the first and second corrugated portions includes a layer
unit having eight layer sections. Each of the eight layer sections
is a portion of one of the first and second layers.
[0006] The plastic bag according to the preferred teachings of the
present invention does not simply increase the number of the layer
sections of the layer units of the first and second corrugated
portions. Due to overlapping of the first and second layers, after
forming the layer units of the first and second corrugated portions
by folding the first and second layers, the number of the layer
sections of each layer unit is doubled.
[0007] The present invention will become clearer in light of the
following detailed description of illustrative embodiments of this
invention described in connection with the drawings.
DESCRIPTION OF THE DRAWINGS
[0008] The illustrative embodiments may best be described by
reference to the accompanying drawings where:
[0009] FIG. 1 shows a perspective view of a plastic bag according
to the preferred teachings of the present invention.
[0010] FIG. 2 shows a perspective view of a semi-product of the
plastic bag of FIG. 1.
[0011] FIG. 2A shows an enlarged top view of a circled portion of
FIG. 2.
[0012] FIG. 3 shows a perspective view of an initial state of the
plastic bag according to the preferred teachings of the present
invention.
[0013] FIG. 4 shows a perspective view of an intermediate state of
the plastic bag according to the preferred teachings of the present
invention.
[0014] FIG. 5 shows a perspective view of a conventional plastic
bag.
[0015] All figures are drawn for ease of explanation of the basic
teachings of the present invention only; the extensions of the
figures with respect to number, position, relationship, and
dimensions of the parts to form the preferred embodiments will be
explained or will be within the skill of the art after the
following teachings of the present invention have been read and
understood. Further, the exact dimensions and dimensional
proportions to conform to specific force, weight, strength, and
similar requirements will likewise be within the skill of the art
after the following teachings of the present invention have been
read and understood.
DETAILED DESCRIPTION OF THE INVENTION
[0016] With reference to FIGS. 1, 2 and 2A, a plastic bag according
to the preferred teachings of the present invention can be utilized
for shopping and for receiving articles, garbage, or any objects in
daily lives. The plastic bag includes a body 1 made of plastic
material and includes overlapped first and second layers 11 and 12
defining a receiving space for receiving purposes. The body 1
further includes two sides respectively having a first corrugated
portion 14 and a second corrugated portion 15. Each of the first
and second corrugated portions 14 and 15 includes a layer unit 16
having eight layer sections. Each of the eight layer sections is a
portion of one of the first and second layers 11 and 12. The
structural strength of the body 1 at the sides is, thus,
enhanced.
[0017] It can be appreciated that the plastic bag according to the
preferred teachings of the present invention does not simply
increase the number of the layer sections of the layer units 16 of
the first and second corrugated portions 14 and 15. Due to
overlapping of the first and second layers 11 and 12, after forming
the layer units 16 of the first and second corrugated portions 14
and 15 by folding the first and second layers 11 and 12, the number
of the layer sections of each layer unit 16 is doubled. As an
example, each layer unit 16 includes eight layer sections when
first and second layers 1 and 2 are utilized.
[0018] In a case that the body 1 includes a third layer overlapping
the overlapped first and second layers 11 and 12, the layer unit 16
of each of the first and second corrugated portions 14 and 15
includes twelve layer sections.
[0019] In manufacture, the first and second layers 11 and 12
overlap each other with two lateral sides of the first and second
layers 11 and 12 joined together along joining lines L1 and L2
(FIG. 3). The overlapped first and second layers 11 and 12 are
folded in two, obtaining a four-layer structure. Next, the
four-layer structure is joined along a joining line L3 (FIG. 4).
Then, the waste material Al outside of the joining line L3 is cut
away.
[0020] The term "join" used herein means engagement by hot melting
or by bonding or gluing at proper locations. The joining lines L1,
L2, and L3 can be continuous or discontinuous.
[0021] With reference to FIG. 2, after removal of the waste
material A1, each of two sides of the four-layer structure is
folded inward to form a recessed portion 17. Thus, each of the
first and second layers 11 and 12 are folded twice, obtaining an
eight-layer structure. The semi-product shown in FIG. 2 can be cut
along a cutting line L4 to obtained two symmetric handles 18 (FIG.
1). Top edges of the layer sections of each recessed portion 17 are
joined to form a top edge 18A for each handle 18. The first and
second layers 11 and 12 are also joined at a bottom 18 of the body
1. The layer unit 16 of each of the first and second corrugated
portions 14 and 15 can be joined to the bottom 18 of the body 21 by
such as pressing.
[0022] Thus since the invention disclosed herein may be embodied in
other specific forms without departing from the spirit or general
characteristics thereof, some of which forms have been indicated,
the embodiments described herein are to be considered in all
respects illustrative and not restrictive. The scope of the
invention is to be indicated by the appended claims, rather than by
the foregoing description; and all changes which come within the
meaning and range of equivalency of the claims are intended to be
embraced therein.
* * * * *