Bag dispenser

A polymer bag dispenser, having a header for receiving a plurality of stacked bags, the header having a leading edge. A plurality of bags is stacked and retained within the header. Each one of the bags has a back panel and a front panel wherein the back panel is longer than the front panel. Each bag includes a lip connected to the bag back panel. A line of perforations is formed in the back panel and the line of perforation is substantially adjacent to, and parallel with, the header leading edge. The line of perforations is created after a stack of bags has been formed in the header. In order to ensure clean separation of a bag from the header and a sharp and uniform edge for lips retained within the header, the line of perforations is disposed at a distance of about 1/4 inch away from the header leading edge. Each one of the panel lips is retained by the header when a bag is separated therefrom, along the line of perforations. As an aid in providing a front free configuration, the header has a curved, centrally located cutout therein formed. The cutout affords easy user access to the topmost bag in the stack and facilitates separation of a bag therefrom.

BACKGROUND OF THE INVENTION 
The present invention relates generally to bag dispensers and, more 
particularly, to stacked polymer bag dispensers. 
At the present time, many retail establishments have eliminated, or 
substantially reduced, use of conventional paper bags and have replaced 
these bags with polymer bags. One of the reasons for such replacement is 
economic since the polymer bags are less expensive to manufacture. In 
addition, the polymer bag is impervious to liquids and thus has utility in 
places, such as the produce area of markets, where they are preferred over 
conventional paper bags that tear when wet. 
In some applications, polymer bags are difficult to use. Food markets, for 
example, utilize rolls containing a substantial number of bags that are 
attached one to the other in a top to bottom relationship. In use, the 
topmost bag is separated from the next in order when it is torn therefrom 
along a line of perforations. The removed bag sometimes presents a 
challenge to a customer attempting to insert produce into it. Since the 
top and bottom of the bag are similar it is sometimes difficult to find 
the bag opening. While this limitation may be only a minor irritant to a 
shopper in a market, it becomes a serious limitation in cases where it is 
necessary to insert many newspapers or flyers, one by one, into polymer 
bags. 
Some of the limitations of dispensing polymer bags from a roll are 
eliminated when the bags are dispensed from a stack. In such cases, it is 
relatively easy for a user to discern the top of the bag from the bottom 
and in a typical setting, conventional stacked bags are useful. 
However, in cases where it is desirable to insert materials repetitively 
and rapidly, as in the example of newspapers or flyers, some conventional 
stacked bags slow up the process because of inherent design limitations, 
as the user finds it difficult to remove cleanly one bag at a time from 
the stack. 
In conventional stacked bag arrangements, each bag contains a line of 
perforations that permit a user to tear a bag, from a stack of fifty to a 
hundred bags, one bag at a time. Conventionally, the line of perforations 
is generated during the bag conversion process when the plastic film is 
run under a serrated wheel attached to the bagging machines. The line of 
perforations separate a bag, which can be torn from the stack, and a lip 
which remains in the stack. While the lines of perforations produced by 
the serrated wheel are almost always straight, the position of the lines 
sometimes shifts slightly from one bag to another. 
As a result, when the bags are arranged in a stack, misalignment of lines 
of perforations, in one bag relative to another, can cause problems for a 
user attempting to remove a bag from the stack. This limitation is best 
seen in cases where the user tries to insert material, such as newspapers 
and flyers, in a short period of time. 
A substantial factor causing this problem in conventional stacked bag 
systems is the aforementioned misalignment of the lines of perforations. 
As bags are removed, they are separated from their respective lips, which 
are left behind. The edges of the residual lips are frequently misaligned, 
because of the failure of lines of perforations to line up uniformly. As a 
result of lip misalignment, it becomes progressively more difficult to 
remove a bag from a stack. This limitation can be substantial in some 
cases, such as newspaper and flyer insertions, where speed and ease of 
insertion and bag removal from a stack are important considerations. 
In view of the foregoing it will be apparent that there is a need for an 
efficient and effective technique for stacking polymer bags such that 
individual bags can be readily and conveniently removed. Desirably, such a 
technique would permit front free disposition of a bag, while it is still 
part of the stack, to enhance the efficiency and speed of material 
insertion. 
DISCLOSURE OF THE INVENTION 
According to the present invention there is provided a technique that 
enables front free access to a stacked bag and convenient removal of the 
bag from the stack. 
In a preferred embodiment, the invention provides a polymer bag dispenser, 
having a header for receiving a plurality of stacked bags, the header 
having a leading edge. A plurality of bags is stacked and retained within 
the header. Each one of the bags has a back panel and a front panel 
wherein the back panel is longer than the front panel. Each bag includes a 
lip connected to the bag back panel. A line of perforations is formed in 
the back panel and the line of perforation is substantially adjacent to, 
and parallel with, the header leading edge. The line of perforations is 
created after a stack of bags has been formed in the header. In order to 
ensure clean separation of a bag from the header and a sharp and uniform 
edge for lips retained within the header, the line of perforations is 
disposed at a distance of about 1/4 inch away from the header leading 
edge. Each one of the panel lips is retained by the header when a bag is 
separated therefrom, along the line of perforations. As an aid in 
providing a front free configuration, the header has a curved, centrally 
located cutout therein formed. The cutout affords easy user access to the 
topmost bag in the stack and facilitates separation of a bag therefrom. 
The present invention affords several advantages. In the first place, the 
location of the line of perforations, separate from the header, permits 
easy access to the topmost bag in a stack. In addition, since only the 
back panel includes a line of perforations, the shorter front panel can be 
separated easily from the back panel, and from the header, to present a 
front free configuration. This represents a significant improvement over 
conventional stacked bag systems because it enables a user to insert a 
newspaper or a flyer into a bag, before the bag is separated from the 
stack. Thus, a more efficient and time saving bag packing technique is 
provided. 
Further, the location of the line of perforations, separated from the 
header leading edge, enables an uniform edge to be formed by the residual 
lips. In this manner, the lips not only do not interfere with bag removal, 
but as bags are removed from the stack, the edge of the residual lips 
increases in thickness to present a surface that facilitates still further 
the bag separation process. 
Other aspects and advantages of the present invention will become apparent 
from the following detailed description, taken in conjunction with the 
accompanying drawings, illustrating by way of example the principles of 
the invention.

BEST MODE FOR CARRYING OUT THE INVENTION 
The present invention may be embodied in other specific forms without 
departing from its spirit or essential characteristics. The described 
embodiments are to be considered in all respects only as illustrative and 
not restrictive. The scope of the invention is, therefore, indicated by 
the appended claims rather than by the foregoing description. All changes 
that come within the meaning and range of equivalency of the claims are to 
be embraced within their scope. 
In the following detailed description and in the several figures of the 
drawings, like elements are identified with like reference numerals. 
Before discussing the novelty and advantages of the polymer bag dispenser 
of the present invention, it will be helpful to review some aspects of a 
conventional bag dispenser, as shown in FIGS. 1 and 2. A polymer bag 
dispenser A includes a stack of bags C retained within a header B. The 
bags are held within the header B by staples D, E and F. In at least some 
cases, the bags have had a line of perforations I formed in the bags, 
before they are stacked for retention within the header B. As mentioned 
above, this method of assembly can produce an uneven accumulation of 
residual lips, such as the lips H, when a number of bags have been removed 
from the stack. 
As a topmost bag, such as the bag G, is removed, the residual lips H are 
pushed upwardly, against a leading edge K of the header B, thereby making 
bag removal difficult. Of course, as more bags are removed from the header 
B, the stack of residual lips H increases in size and becomes increasingly 
unwieldy. As a result, bag removal becomes increasingly more difficult. 
Another limitation of the prior art bag dispenser is illustrated in FIG. 2 
wherein a line of perforations I for separation of a bag from the stack C 
is located well within the header B. This location of the line of 
perforations requires the user to pull the bag downwardly from the header 
B whereas the line of perforations functions most efficiently when a bag 
is torn transversely across it. 
Still another limitation of the prior art dispenser is that the presence of 
the uneven accumulation of lips H can prevent easy access to the bag 
opening while the bag is still in the stack. As a result, use of the 
conventional dispenser for front loading operations, such as insertion of 
newspapers or flyers, while the bag is still in the stack, is precluded. 
In view of the above, it is evident that several limitations impair the 
value and utility of prior art bag dispensers. 
On the other hand, and as shown in FIGS. 3-5 for purposes of illustration, 
the present invention is embodied in a novel polymer bag dispenser 10 
that, in typical cases, comes fully loaded with 50 or 100 fungible polymer 
bags, arrayed in an ordered stack 21. The stack 21 is retained within a 
header 12 and the bags are fused by heat at points 36a-36i. 
Each individual bag, of which a top most bag 23 is exemplary, is 
rectangular having a front panel 25, and a back panel 24. The panels 24 
and 25 are secured along their side and bottom edges. The top edges of the 
front panel 25 and of the back panel 24 are left separate from each other 
and together they define an opening 26 into the interior of the bag 23. 
The back panel 24 is longer than the front panel 25 and, at a location 
above the top edge of the front panel 25, a line of perforations 28 is 
formed across the back panel 24. The line of perforations 28 provides a 
line of demarcation between the back panel 24 and a integrally connected 
lip 27 that is retained within the header 12 after a bag has been removed. 
In use, a polymer bag, such as the bag 23, is removed when one tears the 
bag along the line of perforations 28 to separate the bag from the stack 
21. The lip 27 is retained within the header 12. As best shown in FIG. 4, 
the line of perforations 28 is located adjacent a leading edge 12a of the 
header 12 so that, as bags are removed seriatim from the stack 21, 
residual lips 27 form a relatively smooth non-interfering edge for 
subsequent bag removal. Thus, in a novel manner, not only do the lips 27 
not interfere with removal of the top most bag 23, but facilitate removal 
by providing a relatively smooth edge along which the bag back panel 24 
can be torn. It will be noted that this novel feature comprises an advance 
over the prior art. 
In addition to the above, the lips 27 also enable easy separation of the 
front panel 25 from the back panel 24 thereby to afford the opening 26 
into the bag interior. The opening 26 is accessible to a user while the 
bag 23 is still retained in the header 12 and, as a result, rapid and 
efficient front loading of newspapers and flyers, for example, can be 
accomplished while the bag is still in the stack. In this manner, an 
efficient and effective bag packing operation can be accomplished without 
any need for an additional step of bag removal and positioning, prior to 
insertion of material into the bag. 
Considering now the header 12 in greater detail, with reference especially 
to FIGS. 3 and 5, the header is of elongated rectangular configuration, 
having a curved tab 41 extending from a body portion 31. The tab 41 
includes an opening 33 formed therein. Opposite the tab 41 is a 
complementary cutout portion 38 that is cut from the header body portion 
31. The cutout portion 38 includes a generally contoured, curved shape. It 
will be noted, with reference to FIG. 4, that the line of perforations 28 
is disposed adjacent to, and parallel with, the lateral portions of the 
leading edge 12a while it also follows the contours of the cut out portion 
38. The line of perforations 28 may be spaced from the leading edge 12a by 
a distance of about 1/8 inch to a distance of about 1/2 inch with a 
preferred distance being about 1/4 inch. 
The contoured line of perforations 28 substantially smoothens the bag 
tearing process. In addition, the contoured line of perforations 28 
provides for the formation of a generally curved flap 39 on the bag back 
panel 24. The provision of the flap 39 makes it substantially easier to 
open a dispensed bag, as contrasted with conventional bags, and it 
facilitates bag loading. As a result, bag packing operations can be 
speeded up. 
In addition to the opening 33, the header 12 includes openings 37a-37d, 
which provide flexibility in mounting the dispenser 10 on a variety of 
surfaces. Thus, the dispenser 10 can be readily mounted on a wall mounted 
hook or peg (not shown) or on a table or counter edge as shown in FIG. 5. 
Here, the dispenser 10 is bent over a table or counter edge M while pegs 
P, inserted through the openings 37b and 37c, support the dispenser 10. 
With reference now to FIG. 6, there is shown a bag dispenser 100 which is 
another embodiment of the present invention. The elements of this 
dispenser are identical to counterparts in the dispenser 10 and, as a 
result, bear identical reference numerals. Unlike the dispenser 10, 
however, the dispenser 100 contains an ordered stack of polymer bags 
without a header. As shown in the figure, the dispenser is supported by 
pegs P, inserted through openings 37b and 37c formed in stacked lips 27. 
The dispenser 100 includes the novel advantages set forth above with 
respect to the dispenser 10. 
The significance of the location, contour and method of forming the line of 
perforations 28 has been discussed above. With reference now to FIG. 7, 
there is depicted a technique for forming the line of perforations 28 in 
an ordered stack 21 of polymer bags. It will be noted that a dispenser 10 
is disposed so that the header 12 is suitably placed on a die 101. Means 
for aligning the header, such as datum points, and means for holding the 
dispenser 10 in place, are not shown and it will be appreciated that 
conventional methods are suitable. In order to form the line of 
perforations 28, a punch 103 containing a cutter 105, is forced against 
the die 101. Spring driven strippers 106, 107, 109 and 110 serve to hold 
the dispenser against the die 110 as the cutter 105 is retracted. (The 
strippers 109 and 110 are shown partially in phantom so that the cutter 
105 can be seen clearly.) One skilled in the art of polymer bag dispensers 
will recognize that the technique for forming the line of perforations 28 
in an ordered stack, rather than in individual bags, affords a 
substantially improved bag dispenser. 
Each bag of the plurality of bags is generally rectangular in shape having 
a front and a back panel. In a preferred embodiment, the front panel is 
shorter than the back panel and a line of perforation, substantially 
parallel to the tops of the panels, is formed in the back panel at a 
height above the top of the front panel. The front and back panels are 
secured along their side edges and along their bottom edge. The top edges 
of the front and back panels are left separate from one another and 
together they define an opening into the bag interior. 
From the foregoing it will be appreciated that the polymer bag dispenser 
provided by the invention provides an efficient technique for stacking 
such bags and for enabling a front free configuration for the topmost bag. 
The provision of a line of perforation at a separated distance from the 
header leading edge permits convenient separation of the bag from the 
stack. In addition, this factor enables a clean and uniform lip edge to be 
formed as bags are progressively removed from the stack. Thus, unlike 
conventional stacked bag systems, the lips aid in bag separation, rather 
than function as an impediment to separation. 
It will be evident that there are additional embodiments and applications 
which are not disclosed in the detailed description but which clearly fall 
within the scope of the present invention. The specification is, 
therefore, intended not to be limiting, and the scope of the invention is 
to be limited only by the following claims.