U.S. patent number 3,869,333 [Application Number 05/428,623] was granted by the patent office on 1975-03-04 for a web of double-faced pressure-sensitive stickers.
This patent grant is currently assigned to Do-It Corporation. Invention is credited to Samuel B. McMaster.
United States Patent |
3,869,333 |
McMaster |
March 4, 1975 |
A web of double-faced pressure-sensitive stickers
Abstract
Pressure-sensitive elements, preferably carried in web form
suitable for machine handling, are left bare of the
pressure-sensitive coating along one edge to provide a convenient
portion used as a handle in some forms, as a hanger in other forms.
In one form the pressure-sensitive elements are coated on both
sides except for a very narrow edge, being easily lifted at the
edge and then seized and pulled from the web together with a guard
piece. In other forms, where the handle portion serves primarily as
a hanger, the element is made of sturdy plastic. For some purposes
the plastic and its adhesive preferably have sufficient
transparency so that the hanger may be secured to a package without
concealing any printed matter thereon. In some hanger forms, the
element is slit so that if the part by which something is hung
starts to peel therefrom, it will peel past portions which are
separated from it so that they do not peel with it, these then
resisting further peeling.
Inventors: |
McMaster; Samuel B. (Deerfield,
IL) |
Assignee: |
Do-It Corporation (Highland
Park, IL)
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Family
ID: |
26801518 |
Appl.
No.: |
05/428,623 |
Filed: |
December 26, 1973 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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104420 |
Jan 6, 1971 |
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Current U.S.
Class: |
428/56; 428/138;
206/820; 428/194; 428/354 |
Current CPC
Class: |
C09J
7/20 (20180101); Y10T 428/187 (20150115); Y10T
428/24331 (20150115); Y10T 428/2848 (20150115); Y10S
206/82 (20130101); Y10T 428/24793 (20150115) |
Current International
Class: |
C09J
7/02 (20060101); B32b 003/10 (); B33b 007/06 ();
C09j 007/02 () |
Field of
Search: |
;161/167,406,146,39
;248/205,25A,467 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Dier; Philip
Attorney, Agent or Firm: Darbo, Robertson &
Vandenburgh
Parent Case Text
This is a division of application Ser. No. 104,420 filed Jan. 6,
1971 now abandoned.
Claims
I claim:
1. A web of double-faced pressure-sensitive stickers having the
pressure-sensitive coatings arranged on opposite faces along a
longitudinally extending zone extending less than the full width of
the web, leaving each sticker with an edge portion bare on both
faces by which it may be manipulated, said adhesive portions each
being covered by a carrier strip guarding one face, and a guard
strip guarding the other face and extending over the bare edge
portion of each sticker whereby the edges of the sticker and guard
strip may be jointly curled and grasped for joint removal from the
carrier strip, the double-faced web and said guard strip being
jointly readily separable along successive predetermined transverse
lines while the carrier strip is relatively tear-resistant as
compared to the double faced web and guard strip, whereby
successive separate stickers, each with its guard piece portion of
the guard strip, may be jointly pulled loose from the carrier strip
by grasping the uncoated zone, then jointly applied to one of two
things to be joined; the guard piece then being removed by grasping
its free edge.
Description
INTRODUCTION
One of the problems to which the present invention is directed is
the provision of hanger-extensions for small articles such as
merchandising packages, wall plaques or the like so that they can
be hung, either on display rods or hooks in retail stores, or by
purchasers. Heretofore merchandising packages have been made
suitable for hanging by the use of cards or the like forming the
body of the package, or stapled to the package and having a punched
hanging hole. Both forms virtually required that the package as
initially prepared be intended for such hanging. With the preferred
form of the present invention, universal hangers can be provided
which are extremely low in cost and are provided with
pressure-sensitive adhesive so that they may be quickly and easily
applied to any small item. Preferably these hangers are in web
form, so that they can be applied in rapid succession by a machine.
Also the hangers are preferably made of a sturdy plastic of
sufficient transparency so that they will not obscure any printed
matter on the package.
Another problem to which the present invention is addressed is the
tendency of pressure-sensitive hangers to peel from the surface to
which they are secured, if the article hung is moderately heavy so
that there is a constant and substantial pull by gravity. The
ability of a hanger to resist this peeling is substantially
increased by slitting the hanger so that, perhaps after initial
peeling, the peeling force will be resisted by adhered portions
extending backwards from the direction of peeling.
A third problem to which the present invention relates is the
convenient use of pressure-sensitive stickers. Here the problem is
solved by providing the stickers in web form but with the adhesive
spaced slightly from one edge of the web, the bare edge being
easily raised for peeling. If the web is adhesive-coated on both
faces, it and the top liner or guard strip are preferably
perforated at intervals to provide separate stickers. With this
construction it is very easy with one finger to start both the top
guard strip and the sticker jointly curling away from the base
strip, then grasp them jointly on their bare edge and pull then off
jointly, and press them jointly onto the piece to which they are to
be first attached. Then it is easy to start the top guard strip and
pull it from the sticker, exposing the sticker's second sticky
surface for attachment of the second article to the first. If it is
later desired to separate the two articles and to remove the
sticker, the bare edge is a great aid in starting the removal of
the sticker once it has been exposed.
Additional objects and advantages of the invention will be apparent
from the following description and from the drawings.
DESIGNATION OF THE FIGURES
FIG. 1 is a face view of a portion of a web of press-out hangers
for packages utilizing this invention.
FIG. 2 is a diagrammatic view of a machine for applying the package
hangers of FIG. 1 to packages.
FIG. 2a is a horizontal sectional view through the ram of FIG.
2.
FIG. 3 is a view of a hanger of FIG. 1 applied to a package, with
the printing on the package visible through the hanger.
FIG. 4 is a view of a modified form of hanger which may be provided
in the web of FIG. 1.
FIGS. 5 and 6 are face views of two forms of peel-resistant hangers
especially suitable for hanging objects heavy enough to cause
peeling, it they were hung by ordinary pressure-sensitive
hangers.
FIG. 7 is a view illustrating how the hangers of FIGS. 5 and 6
resist peeling.
FIG. 7a is a face view of the wall piece shown in FIG. 7.
FIG. 8 is a face view of a web of double-faced stickers, the
adhesive being omitted along one edge of the web to facilitate
separation of the parts.
FIG. 9 is a diagrammatic view of a machine for dispensing the
stickers of FIG. 8 in situations where large numbers thereof are
likely to be used.
FIG. 10 is a transverse sectional view through the spreader
position of FIG. 9.
INTENT CLAUSE
Although the foregoing disclosure offered for public dissemination
is detailed to ensure adequacy and so aid understanding, this is
not intended to prejudice that purpose of a patent which is to
cover each new inventive concept therein, no matter how others may
later disguise it by variations in form or additions or further
improvements. The following claims are intended as the chief aid
toward this purpose, as it is these that meet the requirement of
pointing out the parts, improvments, or combinations in which the
inventive concepts are found.
WEB OF PACKAGE HANGERS
FIG. 1 shows a web 11 comprising a strip of heavy tough plastic 12
coated all along a selected zone 13 with pressure-sensitive
adhesive. A guard strip 14 of release paper covers the adhesive
13.
The plastic strip 12 is made up mostly of a series of die cut
hangers 16, each having an aperture 17 therethrough by which the
hanger can be slipped onto a hook or rod, for example when
displayed in a retail store for customer selection. Many plastics
may be used for strip 14, including polypropylene, polystyrene,
Mylar (transparent) polyethylene terephthalate resin) and vinyl.
The present commercial choice is high density polyethylene, about
20 mils thickness.
The web 11 of FIG. 1 is especially suitable for a machine
diagrammatically illustrated in FIG. 2 for applying the hangers 16
to packages. The web 11 may be supplied in the form of a roll 21
from which the web 11 may be drawn. The machine includes rolls 22
of which two serve to draw the web 11, and the other helps to peel
the guard strip 14 from the web. The web then passes under the
applying ram 23 which has been illustrated as operated by solenoid
24. When the solenoid 24 is energized, its ram punches from the web
11 one of the hangers 16 having thereon bare adhesive facing the
package and presses it on a package resting on a table 26 below the
ram. The remainder of the web passes between driven pull-out
rollers 27 which eject the web skeleton into a scrap container. The
web should be fed intermittently, with accurate positioning of its
hangers under the ram. The intermittent drive has been illustrated
by a claw 28 reciprocated by a solenoid 29, the claw being biased
to entering successive apertures 17 and feeding the web 11 much as
a motion picture film is fed through a beam of light, except that
the feed is only one stroke at a time, on demand.
It should be borne in mind that the machine of FIG. 2 is only shown
diagrammatically. An alternative feed is by rollers. with
registration obtained by stopping the drive when microswitch lever
31 falls into a notch in web 11. Various refinements could be
provided. For example, the claw 28 or feed rollers can operate at a
higher speed if pre-feed rolls 22 pull the web from the roll 21
into a loop. There may be another loop, not shown, on the other
side of ram 23 if found to be needed. Either the claw 28 or
projections on one of the pre-feed rolls 22 can eject slugs from
the hole 17 if the slugs cut from them are not removed in the
course of die cutting. The solenoid 24 can be actuated by a
microswitch of which arm 31 is actuated by the package to be worked
upon when it reaches its "home" position, and solenoid 29 can be
automatically actuated when solenoid 24 has returned to its normal
position. Pressure plate 33 (engaging only the bare portion of web
11) applies enough friction to hold the web in position except when
moved by claw 28.
It will be observed that the bare ends of the hangers may
reasonably be referred to as handles, since they may be engaged by
claw 28 during the operation of the machine of FIG. 2 and by hand
for hanging the packages afterwards. To be sure that the ram
accommodates the claw 28 but nevertheless breaks these handles
clean from the plastic strip, its pressing end may be divided with
one portion pressing substantially the entire adhesive area of each
hanger and the other portion pressure near the remote outline of
the handle, the claw 28 working in the space between them. The
upper guide plate 32 can be slotted throughout the length where the
claw reciprocates.
The guard strip 14 is preferably wider than the strip 13 of
adhesive to facilitate starting its removal. This is especially
desirable if the hangers may be applied by hand. If they are not to
be applied by hand the strip 14 may be of the same width as the
adhesive for reasons of economy and convenience of manufacture. The
economy lies not merely in the amount of material used, but in the
fact that the method of manufacture deemed best at present is to
have the adhesive and guard strip made in a roll of sufficient
axial length to cut many composite strips from one roll. At present
it might be more expensive and require preplanning and more time to
have this roll prepared with separated strips of adhesive, so that
wider guard strips could result from slitting in the middle of an
adhesive strip and in the middle of the space between them. Another
way to provide wider guard strips is to remove the strip by which
the adhesive is applied and replace it with one a little wider than
the adhesive strip. The alternative of removing the original guard
strip and replacing it with a wider one also represents extra
expense, as well as a modified machine for doing so.
FIG. 3 shows a typical finished package 34 with one of the hangers
16 secured to it, with the printing on the package visible through
the adhesive end portion of the hanger 16.
FIG. 4 shows a hanger 36 which is of a modified form having a slot
37 instead of a mere aperture. This enables a customer to remove
one package from the rear of others without first removing the
others. This is especially useful when there is a choice of colors,
for example. Web 11 can be made with this style of hanger.
FIG. 5 shows a hanger 41 which represents still additional
modifications. Although this hanger can be used for heavier
packages, it is intended more specially for hanging decorative
objects such as prints or light pictures. Its bare or handle
portion 42 is provided with two slots 43 which permit the object to
be hung at two different heights on the same hook or nail. Also
each slot is elongate horizontally and is provided with a serrated
upper edge so that the object can be shifted laterally to its
properly balanced position, and will stay there, if the supporting
member is narrow enough to fit between the teeth of the
serration.
It will be observed in FIG. 5 that the hanger 41 is slit along a
line 44 of inverted U shape. The handle portion 42 is thus part of
a flap which may be sprung from the plane of the remainder. This
greatly reduces the tendency of pressure-adhesive hangers to come
loose by a gradual peeling under the influence of gravity, when
supporting an object of appreciable weight. A variation of this
which is perhaps even more sure to resist peeling is shown in FIG.
6, in which the hanger 41' has slits 47 which form separated
fingers 48 at the extreme edges of the hanger.
The way the hangers 41 and 41' resist peeling is seen in FIG. 7.
Here a wall hook 49 is seen hanging the hanger 41 (or 41') and the
object 51 to which it is secured. The weight of the object 51 tends
to cause the hanger 41 to peel away from the object 51 slowly but
progressively. However, when it reaches the condition shown in FIG.
7 further peeling is resisted by the fact that the tongue 46 or
fingers 48 have not taken part in this progressive peeling and
further peeling is resisted both above and below the point to which
the peeling has progressed. In the case of the form shown in FIG.
6, when the incipient peeling progresses to the bottoms of the slit
47, this point is virtually surrounded by unpeeled areas. That is,
these unpeeled areas are above, below, and on both sides.
Either type of slitting 44 or 47 can be used with the hangers of
FIGS. 3 and 4, if need for more reliable adhesion is encountered.
However, the dimensions there do not give room for very long
peel-resisting fingers, and there has been no determination of how
much short fingers will help.
Although the hook 49 in FIG. 7 could be a metal hook or a nail, it
has been shown as the hook portion of a plastic pressure-sensitive
"wall hook", the preferred face view of which is seen in FIG. 7a.
With pressure-sensitive wall hooks, the pressure-sensitive material
is commonly on the back surface of a layer of sponge material 52
which extends to all edges of the body 53 of which the hook 49 is a
part. Heretofore such hook bodies have been formed by molding with
the hook portion molded as an outstanding member. It is preferred,
however, that the hook portion be a die cut member as seen in FIG.
7a, the die cutting being a mere slit along most of the length of
the hook but including two perforations 54 one on each side of the
base of the hook. This is advantageous when a picture or other
object is being hung by a wire or string, because a tortuous path
back through one perforation and forwardly through the other tends
to hold the wire or string against unintended slippage so that once
the object is properly balanced it tends to stay that way. When
such a wire or string is used, the hook may be pressed into the
plane of the body where (by the nature of die cutting) there is a
snap-in action or press fit, so that the hook device can safely
support a greater weight than it would otherwise.
DOUBLE FACED STICKERS
FIG. 8 shows another form of pressure-sensitive element, again with
the elements carried in web form and provided with bare handle
portions. In this instance the elements are double faced stickers
56 which are quite useful for many of the uses for which double
faced tape has heretofore been used. Where separate small pieces
are desired, the FIG. 8 form is much handier than double faced
tape. Typical uses include hanging very ligh pieces, such as sheets
of paper on a wall or mounting similar pieces in a book or on
sheets of paper.
Preferably the stickers 56 are nearly separated by perforations
between them in a continuous strip which is sandwiched between a
carrying strip 57 and a perforated guard strip 58. It is quite
convenient in manufacture to run the composite strip through a
machine which does the perforating through both layers to be
perforated and also prints the guard strip to indicate where its
bare edge is.
The user finds it quite easy to raise or curl the bare edge 59 with
his finger. The most convenient method of use is usually to raise
jointly the edges of the guard strip and the sticker. Once raised,
the two are jointly grasped between finger and thumb and pulled
free, both tearing at the perforations. Now they can jointly be
pressed against one of the two pieces to be fastened together. If
desired, the sticker can be firmly secured to this first piece at
this stage by pressing firmly along its adhesive area, the pressure
being exerted through the guard strip. Now it is easy for the user,
with his finger along the bare edge, to curl the guard strip away
from the sticker so that the guard strip may be grasped separately
and pulled from the sticker. This exposes a completely clean
adhesive area of the sticker for bonding to the other of the two
pieces which are to be secured together.
These bare-edged stickers can easily be made by a strip-coating
method similar to that described with respect to FIG. 1. A wide web
is zone-coated on opposite sides of the same spaced zones. After
being sandwiched between additional webs which ultimately form the
carrying strip 57 and guard stripp 58 these joint webs are slit.
They may either be rolled up first and later slit, or they may be
slit immediately. In either event, the slitting is midway of the
adhesive zones and midway of the bare zones between the adhesive
zones. The adhesive zones are fairly close together, specifically
twice as far apart as the desired narrow bare edge 59.
The web-like arrangement of these double-faced stickers makes them
very convenient, either for packaging and ultimate use entirely by
hand as described, or for use with the aid of a dispenser as shown
in FIGS. 9 and 10. Here the web of stickers is drawn from a supply
roll 61. Depending on the wishes of the operator, the guard strip
58 (FIG. 8) may be drawn off by a set of rollers 62. In any event,
the web is drawn past a small plow 63 which raises the bare edge 59
of the sticker 56. Of course there should be a suitable guide loop
66. The user can now grasp the edge 59, and the guard strip with it
if the guard strip has not been removed, without the preliminary
step of curling the bare edge up with his finger. The backing strip
57 (FIG. 8) may pass through a guide loop 66 and be used to pull
the web through this dispenser by hand. This drives rollers 62, if
they are provided. Without these rollers, this dispenser can be the
packaging container with the plow 63 and guide loop 66 added.
ACHIEVEMENT
From the foregoing it is seen that various pressure-sensitive
devices or useful articles have been provided in which the articles
are in web form for convenience, and have bare portions serving
handle-like or support functions. Exceptional convenience of usage
is thus achieved, with additional advantages somewhat varied in the
different forms. In all forms, the articles are extremely low in
cost. This, and the convenience of the preferred web forms, make
the invention very suitable for large quantity usage, which machine
application of the device where desired.
* * * * *