Note: Descriptions are shown in the official language in which they were submitted.
115580g
FIELD OF T~E INVENTION
This invention relates to a blank for a container that will
form an improved dispenser for dispensing abrasive discs from a
backing strip and is a division of application serial number
366,607 filed December 11, 1980.
PRIOR ART
Adhesive ~cked abrasive discs are utilized for attachment
to orbital or rotary sanders. These discs are particularly use-
ful for automotive body work. When used in this environment,
their life is limited due to the difficult use and also the en-
vironment presents difficulties with storage and handling of the
abrasive discs. The discs are not suitable for use if the adhes-
ive backing is not sufficient to attach them to the orbital san-
der. Further, they cannot give a smooth finish if in release
from the backing to which they are attached they are ripped or
wrinkled.
It has been known in the art to supply abrasive discs on a
roller dispenser in which the discs are connected at their edges
to form a strip. The strip is drawn off the roll and severed
by pulling over a toothed cutting device. This method presents
difficulties in that the roll is exposed to dust and dirt prior
to dispensing, and further when they are torn apart, there is a
tendency to rip at the connecting line. If ripped at the con-
necting line their life is shortened or they cause scratches and
are unsuitable for doing fine finishing work.
It is also know to supply abrasive discs with a crepe paper
backing packed individually. Such discs are known to have the
disadvantage that the backing is difficult to remove and the
discs are not protected from becoming contaminated or scattered
3~ as they are not connected together.
- 1 -
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There remains a need for a method of dispensing abrasive
~iscs that will overcome the disadvantages of prior methods of
furnishing adhesive-backed abrasive discs, particularly to the
automotive trade fo~ use with oribital sanders.
According to this invention, there is provided a blank for
container formation comprising a first generally rectangular
panel, a second generally rectangular panel joined to said first
panel at a fold line, a third generally rectangular panel joined
to said second panel at a fold line on the opposite edge of said
second panel from said fold line joining said first and said
second panel, a fourth generally rectangular panel joined to said
third panel by a fold line on the opposite edge of said third
panel from said fold line where said third panel joins said
second panel, four bottom forming members attached to adjacent
edges of said first, said second, said third and said fourth panel,
a fifth generally rectangular panel attached by a fold line to
the opposite edge of said fourth panel from a fold line where said
bottom member is attached, a sixth panel attached by a fold line
to the opposite edge of said fifth panel from said fold line
where said fifth panel is attached to said fourth panel, a seventh
generally rectangular panel attached to said second panel on the
edge opposite a fold line where the bottom panel is attached to
said second panel, two smalqer panels attached at fold lines to
a portion of the two edges adjacent the fold lines where said
second panel joins said seventh panel, a gluing panel attached by
a fold line to the opposite edge of said first panel from said
fold line where said first panel joins said second panel and tab
panels connected to said first and third panels at fold lines on
the opposite edge of said first and third panels from said bottom
forming members
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1 1558~9
the adhesive surface. Alternatively, by pulling the backing
generally upward from the device, the abrasive discs remain
adhered to the backing paper and the backing paper can be cut or
manually torn such that one or several of the discs may be Dulled
free from the device while remaining on the backing and removed to
another work place for later use without risk of contamination of
the adhesive backing.
In a particularly preferred embodiment in accordance with the
invention, the device comprises a cardboard box of generally rec-
tangular dimensions having a bottom wall and four side walls with
a top closure member hingedly connected to the back wall of said
container. A flap connected to the top member extends downward
about one half the vertical height into the box and separates the
leading end of the roll of adhesive-backed discs from the rest of
the roll. The top closure with the separating flap is held down
either by tabs extending upward from the sides of the box into the
top closure member or by latching devices or projections on the
flap which are secured into holes in an inner member when the flap
is closed. The roll of abrasive discs is placed in the container
and when the closure member containing the flap is closed the roll
o~ discs may be pulled from the box without opening the box and
the discs either left on backing paper strips of the roll or if the
backing paper is pulled downwardly over the front rim of the box,
the discs are individually released from the backing paper and pop
up as the roll is pulled from the box.
Brief Description of the Drawings
Fig. 1 is a perspective view of the device of the invention
with one disc partially released or popped free from the backing
member.
Fig. 2 is a vertical section taken on line II-II of Fig. 1.
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Fig. 3 is a perspective view of the dispensing device showing
the top closure and the flap in the open position.
Fig. 4 is a fragmentary top view of the d;spensing strip with
two abrasive discs thereon~
Fig. 5 is a plan view of a container blank showing the pre-
ferred embodiment of the dispensing device of the invent;on wherein
the flap on the closure member has projections which serve as
latching means to hold the top closed during dispensing.
Fig. 6 is a plan view of a blank showing an alternative con-
struction of the dispensing means of the invention wherein flaps
extending from the side walls can be placed into locking slots
formed in the top closure member to hold the top closure member in
place during dispensing and shipping.
Detailed Description of the Invention
The instant invention has numerous advantages over prior
methods of providing adhesive-backed abrasive discs. The instant
device provides the discs in a manner which assures that they are
clean both on the abrasive surface and the adhesive backing.
Further, the instant system allows the discs either to be dispensed
without backing at the container or to be removed in multiple
numbers from the container without exposing the adhPsive backing
and then transported from the container to the work place for
removal. Another advantage of the instant device is that the
dispenser itself may be easily moved to different locations so as
to provide a dispenser where discs are needed. Another advantage
of the instant system is that the shipping container and dispenser
are one and the same thereby simplifying packaging and distribution.
Further advantages of the system of the instant invention will
become apparent from the following description of the drawings.
As shown in Figs. 1 and 2, the device of the invention com-
prises a generally rectangular container generally indicated by the
numeral 12 having a bottom 25, rear wall 24, top closure member 13
and front wall 19. The container, generally indicated as 12, is
adapted to unwind a roll 26 which is inside the container by upward
pulling on the backing sheet 15 for release of discs 16. The roll
26 comprising backing paper 15 carrying discs 16 is pulled upward
between flap 28 and the double thickness front wall. The major
portion of the front wall is of double thickness having outer sheet
19 and inner sheet 22 which is formed by folding down and in on
inner sheet 22 to leave a fold as the top edge 52. The roll 26
may have inner core 23 around which the carrying paper 15 is wrapped.
In the instant device, it is important that the top closure
member 13 not move upward when the backing sheet 15 is pulled to
release the discs 16. Therefore, the top closure me~ber 13 is
latched or fastened shut. In the device illustrated by Figs. 1-3
and 5, the flap 28 is held in place by the insertion of projections
33 of the flap into the cutout 35 in member 36. Members 36 are
~n the form of ears which are extensions of the inner sheet 22 and
extend along the side walls 14 and 27. When the device is closed,
the projections 33 extend into the hole 35 aided by depressions
34 in the flap immediately above the projections 33.
The flap 28 must be of a length that will allow easy dispens-
ing of the discs without catching of the discs onto the flap as
they are pulled from the container 12. The flap generally extends
downward to a point about at the middle of the full roll 26. In
the preferred embodiment this is about one half the vertical height
of the box for best dispensing with no premature separation of
disc from backing sheet, good carbon strength and with suff;cient
res~stance to allow tear off along the upper front edge of the
container.
It is within the scope of the invention to double or fold ears
36 so as to decrease the area for insertion of a roll in the event
1 155809
a smaller roll i5 desired for use in the same container. This is
practiced when dispensing five inch discs in a box which is also
suitable for six inch discs.
Fig. 4 illustrates a backing sheet having a plurality of
discs 16 spaced thereon. The backing sheet lS generally is formed
of a paper that is coated on the surface where the discs are
releasably adhered with a release material to which the adhesive
discs do not completely adhere. Such paper is commonly called
release paper. Such coatings are known in the paper art and may
be waxy or flourine containing release coatings. The coating is
adapted such that the adhesive side of the disc will be secured to
the paper but released when the paper is pulled away from the disc
at a sharp angle. The paper being more flexible than the disc
releases as the beam strength of the disc as it comes from the
box is great enough that it has a strong tendency to-remain straight
when the paper is sharply angled away by being pulled generally
downward over the front edge 52. The front edge 52 is preferably
formed by bending over a perforated fold line 30 that has been cut
at about one quarter inch intervals with about one quarter inch
cuts. The cuts after folding create an area of lands and valleys
on edge 52 which acts as a serrated edge to aid in cutting off the
paper backing. It is within the invention to use a metal toothed
edge for tear off. However, it is preferred not to as the above
described preferred edge is satisfactory and of lower cost.
The top closure member has holes or cut outs 11 and 17. These
cut outs enable both ease of hand gripping of the device for trans-
portation and use and further àllow sighting of the remaining roll
within the box to determine how much is left. The device as illus-
trated also has a flap 41 formed by cutting on line 44. The flap
41 is hingedly connected along hinge line 20 where top closure mem-
ber 13 pivots to close the conta;ner 12. The cut out or hole 44
allows gripping of the box from the rear portion with the fingers
while the thumb is placed in the center hole 17. The flap 41
remains generally in alignment with the rear wall 24 to provide
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protection for the roll from dust when it is not being carried.
The top closure member 13 is supported so as to hinder its being
crushed downward onto the roll 26 by tabs 32 and 38 which fold
inward from side walls 27 and 14 respectively. The cut out 11
extends across the fold l;ne 40 between top member 13 and flap 28.
The hole 11 enables the discs 16 and backing paper 15 to be easily
retrieved if the free end drops slightly back into the container
12 after tear off along edge 52. The user can easily insert a
finger into the cut out 11 and by pressing against the front of
the container pull up the end.
Referring specifically to the blank 20 of Fig. 5 which forms
the container of Figs. 1-3, there is illustrated with fold lines
generally indicated such as at 50 the device of the invention.
While the blank generally formed from cardboard is utilized to form
a container with a single bottom, the bottom is formed of four
flaps 45, 46 and 47 which are held together by latching flap 48 to
form a single surface. The sides 14 and 27 join the front 19 and
rear wall 24 when gluing tab 53 is glued to the rear wall at 24.
Fold lines 54 and 55 may be utilized when the interior area of the
box is desired to be narrowed by folding these tabs in order to
minimize side movement of the roll. Along what will be edge 52
are illustrated the cuts 30 that form the rough tearing edge.
Fig. 6 illustrates an alternative blank 80 for forming a
modi~ied device in accordance with the instant invention. The
device formed by the blank of Fig. 6 utilizes an alternative way of
holding the top member of the device against opening when the roll
carrying the abrasive discs is pulled from the container. The
blank of Fig. 6 includes panels to form a back wall 62, side walls
63 and 65 and a front wall 64. The side walls are joined by
glùing tab 86 to the wall 62. The bottom is formed by joining
pieces 82, 83 and 85 with latching member 84 to form the bottom.
~he top closure member 67 has hole or cut outs 94 and 95 to pro-
vide hand holes for carrying the container and for sighting the
amount of roll remaining. The blank has cut outs 72 and 73 and
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downturn tabs 77 and 76. The cut outs 72 and 73 in combination
with`the downturn tabs 76 and 77 provide a closure means by inser-
tion of tab 74 into slot 73 and tab 75 into slot 72. Slot 68 pro-
vides a separating mechanism between the front wall 64 and the roll
being drawn from the container. Front wall 64 is made of double
thickness by folding sheet 66 against the front wall and ear members
extend back along the side walls. The ear members 88 and 89 may
alternatively be folded at 92 and 93 to provide further thickness
and narrow the ;nterior of the conta;ner somewhat for use with
narrower rolls of adhesive discs. The cuts 60 form the roughened
edge 52 for tearing off the backing paper.
.
While the system of the invention has been illustrated with
two methods of securing the top closure, it is within the inven-
tion to use several other known methods of fastening the lid of
a device. Further, while the carrying holes have been shown as
round in the preferred embodiment, it is within the invention to
form the carrying holes to be oblong such as in 94 or to locate
the carrying cut outs at different locations. Further, it is
within the invention to include a cut out portion on one side of
the container for sighting the height of the roll 26 remaining.
The flaps 28 and 68 have been shown as about half the depth
of the container or stated differently the flaps are about the
radius of roll 26. This depth is considered to be important as
the flap being about half the depth of the device allows feeding
of the roll from the box without separating the abrasive disc from
the backing within the container. Too short a flap or a flap that
extended almost to the bottom of the container would ordinarily
r~sk separation of the backing paper 15 from the abrasive disc 16
prior to its being drawn over the edges 52 or 6n.
~ he system of the invention may be utilized to dispense any
s~ze and grit of abrasive disc. The preferred use is for 5" and
6" diameter discs with grit size ranging from 80 to 320. The roll
may include between 125 and 250 abrasive discs per roll.
1155~9
While the preferred material for the device of the invention
is cardboard, particularly the cardboard with a corrlgated center,
it is within the invention to form the device from other materials
such as plastics or metal. Such materials might be desirable in
the use of abrasive discs in wet areas or corrosive environments
where it would be desirable to protect them until dispensing.
Further, while the device of the invention finds its preferred
use in dispensing of abrasive discs, the system of the invention
would be suitable for dispensing other materials such as labels or
foods that may be carried on a flexible backing material. The
flexible backing material itself may be of a material other than
paper, such as plastic films.
The invention has been described with reference to particular
embodiments thereof, but it will be understood that variations and
modifications may be effected within the spirit and scope of the
claims that appear below. For instance, while described as a
dispenser with the discs and paper backing being pulled from the
top of the dispenser, it is, of course, within the invention to
orient the device such that the release paper is exiting to the
s1de or downward.
