U.S. patent number 3,845,894 [Application Number 05/338,855] was granted by the patent office on 1974-11-05 for film retaining dispenser attachment.
Invention is credited to David G. Merlin.
United States Patent |
3,845,894 |
Merlin |
November 5, 1974 |
FILM RETAINING DISPENSER ATTACHMENT
Abstract
In a container for dispensing film, preferably from a supply
roll therein, and including a front wall, a bottom wall, a cutter
bar along their outer juncture, a tear strip, and die-cut glued
areas removably securing the tear strip to the front wall prior to
feeding the film lead over the front wall and severing the lead
with the cutter bar, at least one separable laminated film
retaining attachment arranged between the front wall and tear
strip, such attachment including an inner substrate secured to the
front wall and having a pressure sensitive adhesive outer surface,
and an outer substrate secured to the tear strip and having an
adhesive resistant inner surface contacting and froming an
interface with such adhesive outer surface, whereby on removal of
the tear strip the substrates separate along their interface to
expose the pressure sensitive adhesive outer surface for releasably
retaining the remaining portion of the severed lead for subsequent
feeding and severing operations.
Inventors: |
Merlin; David G.
(Williamsville, NY) |
Family
ID: |
23326431 |
Appl.
No.: |
05/338,855 |
Filed: |
March 7, 1973 |
Current U.S.
Class: |
225/25;
225/48 |
Current CPC
Class: |
B65D
83/0882 (20130101); B65H 35/0006 (20130101); Y10T
225/222 (20150401); Y10T 225/248 (20150401); B65D
85/672 (20130101) |
Current International
Class: |
B65D
83/08 (20060101); B65H 35/00 (20060101); B65D
85/67 (20060101); B65D 85/672 (20060101); B26f
003/02 () |
Field of
Search: |
;225/19,25,26,39,43,48,49,50 ;229/17R,17S ;206/DIG.18,57R |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Juhasz; Andrew R.
Assistant Examiner: Gilden; Leon
Attorney, Agent or Firm: Sommer & Sommer
Claims
What is claimed is:
1. A container for dispensing film and including a trailing wall, a
leading wall joined to said trailing wall, cutting means arranged
along the outer juncture of said leading and trailing walls, a tear
strip, and means removably securing said tear strip to the outer
side of said leading wall prior to feeding the lead of the film
over said outer side of said leading wall and beyond said trailing
wall for severing such lead by said cutting means, wherein the
improvement comprises: separable laminated film retaining
attachment means arranged between said tear strip and said leading
wall, and including an inner substrate secured to the outer side of
said leading wall and having a pressure sensitive adhesive outer
surface, and an outer substrate secured to the inner side of said
tear strip and having an adhesive resistant inner surface
contacting and forming an interface with said adhesive outer
surface, whereby upon removal of said tear strip said inner and
outer substrates separate along said interface to expose said
pressure sensitive adhesive outer surface for releasably retaining
the remaining portion of the severed lead for subsequent feeding
and severing operations.
2. The container of claim 1 wherein said inner substrate includes
an intermediate layer, an inner coating bonded to said outer side
of said leading wall, and an outer coating having said pressure
sensitive adhesive outer surface.
3. The container of claim 2 wherein said intermediate layer is
paper, and said inner and outer coatings are pressure sensitive
adhesive.
4. The container of claim 1 wherein said inner substrate is
pressure sensitive adhesive bonded to said outer side of said
leading wall and having said pressure sensitive adhesive outer
surface.
5. The container of claim 1 wherein said outer substrate includes
an outer layer bonded to said inner side of said tear strip, and an
inner release coating having said adhesive resistant inner
surface.
6. The container of claim 5 wherein said outer layer is paper, and
said inner release coating contains silicone.
7. The container of claim 1 wherein said outer substrate includes
an intermediate layer, an outer coating bonded to said inner side
of said tear strip, and an inner release coating having said
adhesive resistant inner surface.
8. The container of claim 7 wherein said intermediate layer is
paper, said outer coating is pressure sensitive adhesive, and said
inner release coating contains silicone.
9. The container of claim 1 wherein said inner substrate includes
an intermediate layer, an inner coating bonded to said outer side
of said leading wall, and an outer coating having said pressure
sensitive adhesive outer surface; and wherein said outer substrate
includes an outer layer bonded to said inner side of said tear
strip and an inner release coating having said adhesive resistant
inner surface.
10. The container of claim 9 wherein of said inner substrate said
intermediate layer is paper, and said inner and outer coatings are
pressure sensitive adhesive; and wherein of said outer substrate
said outer layer is paper, and said inner release coating contains
silicone.
11. The container of claim 1 wherein said inner substrate includes
an intermediate layer, an inner coating bonded to said outer side
of said leading wall, and an outer coating having said pressure
sensitive adhesive outer surface; and wherein said outer substrate
includes an intermediate layer, an outer coating bonded to said
inner side of said tear strip, and an inner release coating having
said adhesive resistant inner surface.
12. The container of claim 11 wherein of said inner substrate said
intermediate layer is paper, and said inner and outer coatings are
pressure sensitive adhesive; and wherein of said outer substrate
said intermediate layer is paper, said outer coating is pressure
sensitive adhesive, and said inner release coating contains
silicone.
13. The container of claim 1 wherein said inner substrate is
pressure sensitive adhesive bonded to said outer side of said
leading wall and having said pressure sensitive adhesive outer
surface; and wherein said outer substrate includes an outer layer
bonded to said inner side of said tear strip and an inner release
coating having said adhesive resistant inner surface.
14. The container of claim 13 wherein said outer layer is paper,
and said inner release coating contains silicone.
15. The container of claim 1 wherein said inner substrate is
pressure sensitive adhesive bonded to said outer side of said
leading wall and having said pressure sensitive adhesive outer
surface; and wherein said outer substrate includes an intermediate
layer, an outer coating bonded to said inner side of said tear
strip, and an inner release coating having said adhesive resistant
inner surface.
16. The container of claim 15 wherein said intermediate layer is
paper, said outer coating is pressure sensitive adhesive, and said
inner release coating contains silicone.
Description
BACKGROUND OF THE INVENTION
1. FIELD OF THE INVENTION
The present invention relates to improvements in containers for
dispensing film, and more particularly to new and improved film
retaining dispenser attachment means. The term "film" as used
herein comprehends any type of flexible sheet material which may be
dispensed from a container, preferably from a supply roll therein,
such as polymeric plastic, paper, and metal.
2. Description of the Prior Art
Film dispensing containers are well known, particularly in
domestic, institutional and industrial applications. In this usage,
such containers commonly dispense various types of films, such as
plastic, paper and metal, which are useful in wrapping food,
packages and other products. While these known containers have
provided ease in handling and dispensing such film, the uses of
such containers have their attendant problems.
One continuing problem is caused by the weight of the usual supply
roll in the dispensing container and the fact that the film may
possess a degree of elasticity when tensioned, both of which
factors tend to cause the roll to rewind when the film is released.
In typical practice, after opening the container by removing the
cover tear strip from the front wall and raising the cover, the
consumer grasps the lead portion of the film, pulls it out from the
container and down over and beyond the front wall and then cuts off
the desired length by use of the serrated cutting edge of a cutting
bar at the outer juncture of the front and bottom container walls.
Normally, the film is held taut before cutting. After cutting, the
tensioned lead portion of the film remaining on the roll tends to
rewind and sometimes twists and turns upon itself. Some polymeric
plastic films, such as those possessing "cling" characteristics,
acquire a static electricity charge and are difficult to straighten
if folded or wrinkled.
Thus, despite widespread acceptance of these containers, the
problem of keeping the remaining uncut lead portion exposed and
straight for ready accessibility has persisted to the present
day.
Some have attempted to solve this problem, as typically shown by
Wankow U.S. Pat. No. 3,549,066. Wankow provides a series of vinyl
spots on the container front wall adjacent the cutter bar to retain
and hold the remaining lead portion of "cling" type polymeric film
to the container after a desired length had been torn off. While
somewhat successful in holding such "cling" type films, the vinyl
spots are incapable of holding other films not possessing "cling"
characteristics. Before opening the container, Wankow suggests
protecting his vinyl spots by a removable tear strip on the cover,
but does not disclose how the tear strip seals the container prior
to opening thereof. Wankow also discloses using various other types
of spot material for retaining "cling" type films, but not
non-"cling" type films. In addition, this patent discloses the use
of pressure sensitive adhesive spots for holding non-"cling" type
films, but does not disclose the use of such pressure sensitive
adhesive spots with a typical tear strip, whether or how such tear
strip is secured to the container front wall prior to removal of
such tear strip, or how to keep such pressure sensitive spots from
being removed with the tear strip, whether such spots be deposited
on the front carton wall in liquid form or as a double faced
tape.
Other prior art devices, such as Buttery et al. U.S. Pat. No. Re.
25,876, disclose using adhesively coated die cut areas to hold a
tear strip to the container, for sealing purposes prior to removal
of such tear strip. However, these devices do not propose
thereafter to hold the uncut lead portion of film after the tear
strip has been removed, because the adhesively coated die cut areas
are removed with the tear strip, or in some instances, part of the
inner paper layer of the tear strip remains on the die cut areas.
Moreover, the adhesives employed are of the liquid resinous type,
which when dried, do not remain tacky and are useless for holding
non-"cling" type film in any event.
SUMMARY OF THE INVENTION
Therefore, in response to such continuing problem, the primary
object of the present invention is to provide new and improved film
retaining dispenser attachment means which not only permits the
conventional sealing of the carton by the usual tear strip prior to
usage of the film, but also in no way interferes with either
securing or removing such tear strip, while still being effective
to releasably retain both "cling" and non-"cling" type film lead
portions during film usage, following tear strip removal. To this
end, the present invention provides a container for dispensing film
and including a trailing wall, a leading wall joined to the
trailing wall, cutting means arranged along the outer juncture of
such leading and trailing walls, a tear strip, and means removably
securing the tear strip to the outer side of the leading wall prior
to feeding the lead of the film over the outer side of the leading
wall and beyond the trailing wall for severing such lead by such
cutting means, wherein the improvement comprises: separable
laminated film retaining attachment means arranged between the tear
strip and the leading wall, and including an inner substrate
secured to the outer side of the leading wall and having a pressure
sensitive adhesive outer surface, and an outer substrate secured to
the inner side of the tear strip and having an adhesive resistant
inner surface contacting and forming an interface with such
adhesive outer surface, whereby upon removal of such tear strip
such inner and outer substrates separate along such interface to
expose such pressure sensitive adhesive outer surface for
releasably retaining the remaining portion of the severed lead for
subsequent feeding and severing operations.
Another object of the present invention is to provide such film
retaining dispenser attachment means wherein the pressure sensitive
adhesive outer surface of the inner substrate is both protected and
kept viable by the aforesaid contact and interface formed with the
adhesive resistant inner surface of the outer substrate prior to
removal of the tear strip, and wherein such pressure sensitive
adhesive outer surface is exposed and rendered readily accessible
for use upon removal of such tear strip and inner substrate.
The above and additional objects and advantages of the present
invention will become more apparent upon consideration of the
following detailed description and accompanying drawing.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a perspective view of a film dispensing container
incorporating the present inventive attachment.
FIG. 2 is an enlarged transverse sectional view taken on line 2--2
of FIG. 1 and illustrating a first preferred embodiment of the
inventive attachment arranged between the front wall and tear strip
in alignment with the die cut areas and glue strip sealing the
container, but with the thickness of the attachment being greatly
exaggerated in this and the remaining views for clarity of
illustration.
FIG. 3 is a further enlarged fragmentary view of a portion of FIG.
2 and illustrating the detailed construction of such first
preferred embodiment.
FIG. 4 is an enlarged view illustrating the tear strip after
removal from the dispenser and shows the separation of the inner
and outer substrates of such first preferred embodiment.
FIG. 5 is a further enlarged fragmentary detail view of the
separated first embodiment shown in FIG. 4.
FIG. 6 is an enlarged view similar to FIG. 4 but illustrating the
remaining portion of the severed lead of the film releasably
retained on the front wall of the container by the inner
substrate.
FIG. 7 is a further enlarged fragmentary detail view of the portion
of FIG. 5 showing the film retention.
FIG. 8 is an enlarged fragmentary exploded view of the front wall,
tear strip and first preferred embodiment, which employs the glue
strip for bonding the outer substrate as well as the die cut areas
to the tear strip.
FIG. 9 is a view similar to FIG. 8, but illustrating a second
preferred embodiment of the invention in which the inner substrate
is composed of but a single layer as opposed to the three layers
incorporated in the first preferred embodiment.
FIG. 10 is a view similar to FIG. 8, but illustrating a third
preferred embodiment of the invention, which embodiment is located
out of alignment with the die cut areas and glue strip, as also
shown in FIG. 1, with both the inner and outer substrates being
composed of three layers, and the outer substrate being bonded to
the tear strip independently of the glue strip.
FIG. 11 is a view similar to FIG. 10, but illustrating a fourth
preferred embodiment of the invention wherein the inner substrate
is composed of but a single layer.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIG. 1, a film dispensing container embodying the
present invention is generally indicated at 10, and is shown as
containing a cylindrical roll R of film. Container 10 includes an
upwardly open rectangular trough formed by vertical front or
leading wall 12, right end wall 14, rear wall 16, left end wall 18
and horizontal bottom or trailing wall 20. Container 10 is
completed by an inverted generally L-shaped cover 22 including a
horizontal portion 24 hinged at its rear edge to rear wall 16 and
having integral depending vertical upper and lower front portions
26, 28 positioned adjacent the outer surface of front wall 12 and
divided by a horizontal perforation line 30, thereby constituting
lower portion 28 as a removable tear strip. Both upper portion 26
and tear strip 28 are indented or cut away at each end of
perforation line 30 to form a finger receiving recess 32 to
facilitate removal of tear strip 28, which is removably secured to
front wall 12 by adhesively coated die-cut areas 34, in the usual
manner, as described in greater detail below.
As best illustrated in FIGS. 1 and 2, a horizontal serrated cutting
bar 36 is suitably mounted on the under surface of bottom wall 20
and has its serrations extending slightly beyond the outer surface
of front wall 12 to provide a cutting edge along the front and
bottom wall outer juncture throughout the length of container 10.
However, prior to its removal, tear strip 28 not only serves to
seal the container, but also as a guard for the cutting bar.
While container 10 and its various aforesaid components are
manufactured in a well known manner, and somewhat similar to that
disclosed in the aforesaid Buttery et al. patent, it is well to
note the following brief summary of such manufacture. A blank of
laminated paperboard or the like is usually sequentially printed on
its outer side, as with advertising, etc., die cut, scored and
creased to form the various wall portions, stripped of excess
material and provided with the cutting bar which is suitably
attached thereto. The printing and die cutting operations produce
the unprinted die cut areas 34 on the outer side of front wall 12,
as well as other unprinted areas (not shown). Next, the container
blank is placed in a "gluing" machine, which applies strip 34a
(FIGS. 8 and 9) of liquid resinous glue on the inner unprinted side
of tear strip 28 along its length and folds container 10 flat, in
any suitable manner, with tear strip 28 adhered to die cut areas 34
by glue strip 34a, but not to the printed intermediate areas which
are coated during printing by a clear lacquer, varnish, high gloss
inks incorporating lacquer, varnish or the like, and therefore
adhesive resistant. Thus, upon leaving the gluing machine, the so
folded and glued container is ready for unfolding, inserting of the
film supply roll and folding and gluing of the various flaps (not
shown) forming end walls 12, 14, except for installation of the
inventive attachment, such as 40 (FIG. 1). This installation can
conveniently be accomplished in any suitable manner, following the
stripping operation, and prior to the adherence of tear strip 28 to
die cut areas 34, care being taken that the area or areas, on the
outer side of front wall 12, and to which one or more of such
attachments are secured are not printed, in order to enhance the
desired bond therewith.
As shown in FIG. 1, a first preferred embodiment of the inventive
attachment is generally indicated at 40, in alignment with die cut
areas 34, and only one such attachment is illustrated as replacing
the usual central die cut area of which four remain, it being
evident that the number and shape of such die cut areas may vary as
desired. As also will be evident, the shape of such attachment may
vary, and two or more such attachments could be employed,
preferably being located between die cut areas in this embodiment.
At this point, it is significant to note that the glued die cut
areas 34 serve to seal container 10 prior to removal of tear strip
28, and that the present embodiment conveniently makes use of the
liquid resinous glue or adhesive strip 34a to bond the outer
substrate of such embodiment to tear strip 28.
It also is significant to note at this point, that the thickness of
the inventive attachment is greatly exaggerated throughout FIGS.
2-11 for clarity of illustration. Hence, the addition of such
attachment does not interfere in any way with the securing or
removal of the tear strip.
As best shown in FIGS. 2, 3, 5 and 8, and particularly FIG. 5, the
first preferred form 40 of the present invention includes an inner
substrate 42 secured to the outer side of front wall 12 and having
a pressure sensitive adhesive outer surface, and an outer substrate
44 secured to the inner side of tear strip 28 and having an
adhesive resistant inner surface contacting and forming an
interface with the adhesive outer surface of inner substrate 42.
Such contact and interface serve to protect and maintain the
viability of such pressure sensitive adhesive outer surface until
the tear strip is removed.
In this embodiment, inner substrate 42 is composed of three layers,
an intermediate paper layer 42b, an inner pressure sensitive
adhesive coating 42a bonded to the outer side of front wall 12 and
an outer coating 42c of pressure sensitive adhesive which forms
such pressure sensitive adhesive outer surface. As will be evident,
inner substrate 42 can be characterized as a double faced adhesive
tape. Outer substrate 44 is composed of two layers, an outer paper
layer 44b bonded to the inside of tear strip 28 by the aforesaid
adhesive or glue strip 34a, and an inner release coating 44c
containing silicone or the like and forming such adhesive resistant
inner surface.
In applying attachment 40 to container 10, both substrates 42 and
44 may be prelaminated as shown in FIG. 8, and applied as an unit
to front wall 12 prior to adherence of tear strip 28 to glue strip
34a, as noted above. Following insertion of roll R and completion
of end walls 12, 14, the bonding between die cut areas 34 on the
front wall and glue strip 34a on the tear strip effectively
maintains container 10 in the desired sealed condition prior to
use. When container 10 is to be used, the consumer removes the tear
strip in the usual manner, as by peeling it off lengthwise along
tear line 30. Thus, as shown in FIGS. 4 and 5, laminated attachment
40 readily separates at the interface between coatings 42c, 44c,
because the bonds between inner substrate 42 and front wall 12 as
well as between outer substrate 44 and tear strip 28 are
considerably stronger than the weak bond between coatings 42c and
44c. Hence, the inventive attachment in no way interferes with
either the bonding or removal of the tear strip, during the latter
of which the strong bond between the die cut areas 34 and glue
strip 34a removes an outer layer of such die cut areas, or
sometimes an inner layer portion of tear strip 28, unlike the
predictable separation of attachment 40 at the aforesaid
interface.
Next, as shown in FIGS. 6 and 7, the consumer opens cover 22 and
withdraws lead L from film supply roll R, while reclosing the cover
with upper vertical portion or flap 26 arranged inside of the lead
to provide the desired frictional drag. Continuing with the lead,
the user feeds the same under tension down over front wall 12 and
beyond bottom wall 20 until the desired length is obtained, at
which time the user, by pressing inwardly and downwardly, severs
lead L by tearing it along the serrated knife edge of cutter bar
36. As this action occurs, the lead L makes contact with the
pressure sensitive adhesive outer surface of coating 42c, which
releasably yet effectively retains the remaining uncut portion of
the severed lead in position for subsequent feeding and severing
operations. Usually, the remaining lead portion tends to move
outwardly away from cutter bar 36 following severing, as shown in
FIG. 7, and readily may be grasped at each end on opposite sides of
substrate 42 or below the same, which is conveniently spaced above
the cutter bar. As noted above, two or more such attachments 40 may
be provided, if desired, but the central one illustrated is
sufficient normally, and does provide the best access for grasping
the lead for further use.
Turning to FIG. 9, a second preferred embodiment is shown therein,
and is generally indicated at 40'. The only structural difference
is that the inner substrate 42' is composed of but a single layer
42c' of pressure sensitive adhesive which is bonded at its inner
surface to the outer side of front wall 12 and provides the desired
pressure sensitive adhesive outer surface forming the desired
contact and interface with the inner adhesive resistant surface of
outer substrate 44'. Like outer substrate 44' is composed of outer
paper layer 44b' and inner silicone or the like containing release
coating 44c'. Once again, attachment 40' is applied to front wall
12 in the same manner, with the prelaminated layers 42c', 44c', and
44b' being bonded to the container front wall 12 and also bonded by
glue strip 34a to tear strip 28 in the manner described above.
Likewise, this second preferred embodiment 40' functions in the
same manner as first preferred embodiment 40, the principal
advantages of the former being in reduction in thickness and
material costs by virtue of the elimination of inner layer 42a and
intermediate paper layer 42b. However, under some circumstances,
the triple layer inner substrate feature of embodiment 40 may have
advantages in simplifying application of the attachment,
particularly when inner substrate 42 is in the form of double faced
tape.
Considering now FIG. 10, a third preferred embodiment 40" is shown
therein. From a structural standpoint, there are two significant
differences as compared to embodiment 40 of FIG. 8. The first is
that embodiment 40" is located out of alignment with die cut areas
34 and glue strip 34a, and preferably above the same, as shown in
FIG. 1, although the attachment could be located below such die cut
areas and glue strip, if desired. Likewise, more than one
attachment could be used and variably located above and below the
die cut areas and glue strip, as well as variety of shapes. Thus,
this first difference leads to the second, wherein outer substrate
44" includes three layers instead of two. Accordingly, inner
substrate 42" includes intermediate paper layer 42b", inner
pressure sensitive adhesive coating 42a" and outer pressure
sensitive adhesive coating 42c", while outer substrate 44" includes
intermediate paper layer 44b", outer pressure sensitive adhesive
coating 44a" and inner silicone or the like containing release
coating 44c". These two substrates are prelaminated, as shown in
FIG. 8, and applied to front wall 12 as described above, except
that outer coating 44a" serves to bond embodiment 40" to tear strip
28 independently of glue strip 34a. Functionally, embodiment 40"
separates as noted above for the two previous embodiments, and
besides possessing the convenience of a double faced tape for both
substrates, also eliminates, for practical purposes, the
possibility of accidental covering of the attachment in the
unlikely event of delamination of tear strip 28 upon removal
thereof. Even so, both embodiments 40 and 40' readily could be
uncovered (i.e., separated) by peeling off such delaminated tear
strip portion.
Turning to FIG. 11, a fourth preferred embodiment is generally
indicated at 40'", and is similar in structure, application and
function to embodiment 40", except that inner substrate 42'" is
composed of but a single layer 42c'" of pressure sensitive
adhesive, while outer substrate 44'" includes intermediate paper
layer 44b'", outer pressure sensitive coating 44a'", and inner
silicone or the like containing release coating 44c'". Hence,
embodiment 40'" possesses the advantages of reduced thickness and
material costs as in embodiment 40' of FIG. 9.
It now will be seen how the present invention accomplishes its
objectives, and numerous advantages thereof likewise will be
evident, particularly in releasably yet effectively retaining any
type of film, whether of the "cling" or non-"cling" type. Further,
while the invention has been described and illustrated herein by
reference to certain preferred embodiments, this is to be
considered as illustrating rather than as limiting the scope of the
invention, which is to be determined by the appended claims.
* * * * *