U.S. patent number 3,727,750 [Application Number 05/210,051] was granted by the patent office on 1973-04-17 for sterile package and blank therefor.
This patent grant is currently assigned to Standard Paper Box Corp.. Invention is credited to Noel A. Petter.
United States Patent |
3,727,750 |
Petter |
April 17, 1973 |
STERILE PACKAGE AND BLANK THEREFOR
Abstract
A sterile package formed from a blank made of a delaminatable
material, preferably paperboard, has a tear strip defined therein
by scoring the blank to define a plane of cleavage along which the
tear strip delaminates. An inwardly folded tab is formed on one end
of the tear strip for bonding to the package to form a bacteria
tight seal at the end of the tear strip. The tab is pulled to open
the package by delaminating the tear strip along its plane of
cleavage.
Inventors: |
Petter; Noel A. (Glendale,
CA) |
Assignee: |
Standard Paper Box Corp. (Los
Angeles, CA)
|
Family
ID: |
22781404 |
Appl.
No.: |
05/210,051 |
Filed: |
December 20, 1971 |
Current U.S.
Class: |
206/438; 229/207;
229/235; 229/190; 229/926 |
Current CPC
Class: |
A61L
2/26 (20130101); B65D 5/5445 (20130101); Y10S
229/926 (20130101) |
Current International
Class: |
A61L
2/26 (20060101); B65D 5/54 (20060101); A61b
019/02 (); A61l 015/00 (); B65d 005/54 () |
Field of
Search: |
;206/46SG,46ST,56AA,63.2R ;229/51DB,51AS,51TS,51TC,51SC,51WB
;220/54 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Rothberg; Samuel B.
Assistant Examiner: Lipman; Steven E.
Claims
I claim:
1. A sterile package, comprising:
structure forming a bacteria impervious enclosure for a sterile
instrument, said structure being made at least in part from a
delaminatable material;
a tear strip for opening said package defined in said delaminatable
material by scoring the exterior and interior surfaces of said
material to define a plane of cleavage therein along which said
tear strip delaminates to separate from said package, said tear
strip having first and second end; and
a tab formed on the first end of said tear strip, said tab being
folded inwardly with its interior surface folded toward the
interior surface of the first end of said tear strip and having its
exterior surface bonded to said package to make a bacteria tight
seal therewith whereby to open said package said tab is pulled away
from said package to break its bond with said package and
delaminate said tear strip along said plane of cleavage.
2. The invention defined in claim 1, wherein:
the portion of said structure made from said delaminatable material
extends around the entire circumference of said package and
overlaps to a predetermined extent;
said tear strip is defined by said score lines to extend around the
entire circumference of said structure and the ends of said tear
strip are defined by said score lines to overlap each other so that
removal of said tear strip from said structure separates said
package into two portions; and
the exterior surface of said tab is bonded to the exterior surface
of the second end of said tear strip to make a bacteria tight seal
therewith.
3. The invention defined in claim 2, wherein said tear strip is
defined by a first and second pair of spaced apart score lines,
said first pair of score lines being cut a predetermined distance
into the interior surface of said delaminatable material to extend
from the tip of the first end of said tear strip to the tip of the
second end of said tear strip, said second pair of score lines
being cut a predetermined distance into the exterior surface of
said delaminatable material to extend from the points of
intersection of said first score lines with the tip of the first
end of said tear strip outside of said first score lines to the tip
of the second end of said tear strip whereby the adjacent ones of
said first and second score lines cooperate with each other to form
said cleavage plane along which said material delaminates.
4. The invention defined in claim 3, wherein:
said first pair of score lines are mutually parallel;
the portion of said second pair of score lines extending from the
tip of the second end of said tear strip to the first end of said
tear strip are parallel with said first score lines; and
the portion of said second pair of score lines extending along the
first end of said tear strip to the tip thereof taper towards each
other to intersect said first end tip at the points of intersection
of said first score lines therewith.
5. The invention defined in claim 4, wherein said tab is integral
with said tear strip being also formed from said delaminatable
material and extends from the tip of said first tear strip end.
6. The invention defined in claim 5, wherein said tab is defined by
extending said first pair of mutually parallel score lines along
the interior surface thereof to its tip and by extending the
tapering portion of said second pair of score lines along the
exterior surface thereof to its tip so that the portion of said
second score lines cut in said tab lie within said first score
lines and the adjacent ones of said first and second score lines
cooperate with each other on said tab to form a plane of cleavage
for said tab along which said tab delaminates when pulled away from
said package.
7. The invention defined in claim 6, wherein:
the tapering portion of said second pair of score lines are
straight lines so that said second score lines define a triangular
area on the exterior surface of said tab; and including:
a third pair of score lines cut in the exterior surface of the
second end of said tear strip to define a triangular area therein
corresponding in shape to the triangular area defined in said tab,
the triangular area defined by said third score lines being
positioned on said second tear strip end to be in alignment with
and bonded to the triangular area of said tab whereby said second
score lines on said tab are aligned with said third score lines on
said second tear strip end to facilitate the delamination of said
tab when pulled away from said package.
8. The invention defined in claim 7, wherein:
said third score lines extend to the tip of the second end of said
tear strip; and including:
a transverse score line interconnecting the ends of said third
score lines remote from the tip of the second end of said tear
strip.
9. The invention defined in claim 8, wherein:
said structure forming the bacteria impervious enclosure is made of
a delaminatable paperboard material;
each of said score lines are cut to a depth of approximately one
half the thickness of said paperboard material; and
said tab is adhesively bonded to the second end of said tear
strip.
10. The invention defined in claim 9, wherein the portion of said
tab which joins the tip of the first end of said tear strip extends
outward from said structure forming the bacteria impervious
enclosure so that said tab may be easily gripped for pulling
thereon.
11. In a sterile package made at least in part of a paperboard
material which has a removable tear strip formed in said paperboard
material by scoring the exterior and interior surfaces of said
paperboard material to define a plane of cleavage therein along
which said tear strip delaminates to open said package, the
improvement of a tab formed integral with one end of said tear
strip, said tab being folded inwardly with its interior surface
folded toward the interior surface of said tear strip and having
its exterior surface adhesively bonded to said package in a
bacteria tight seal therewith whereby to open said package so that
a sterile commodity may be removed therefrom said tab is pulled
away from said package to break its adhesive bond therewith and
delaminate said tear strip along said plane of cleavage.
12. The invention defined in claim 11, wherein said tab tapers
narrowing towards its tip.
13. A blank made of a bacteria impervious paperboard which is cut,
scored and creased to be foldable to form a bacteria impervious
enclosure when adhesively sealed along its edges, said paperboard
blank having an exterior and interior surface and comprising:
first and second edge portions the exterior surfaces of which are
adhesively secured together when said paperboard blank is folded to
form a bacteria impervious enclosure, said second edge portion
being foldable inwardly so that the exterior surface of said second
edge portion may be adhesively secured to the exterior surface of
said first edge portion; and
a tear strip defined by scoring the exterior and interior surfaces
of said paperboard blank from the outside edge of said first edge
portion to the line along which said second edge portion folds
inwardly to define a plane of cleavage therein along which said
tear strip delaminates to separate from said blank;
a tab for pulling said tear strip from said blank defined in said
second edge portion by continuing said score lines across the
exterior and interior surfaces of said blank to the outside edge of
said second edge portion, said tear strip and tab are defined by a
first and second pair of spaced apart score lines, said first pair
of score lines being cut into the interior surface of said blank to
extend from the outside edge of said first edge portion to the
outside edge of said second edge portion, said second pair of score
lines being cut into the exterior surface of said blank to extend
from the points of intersection of said first score lines with the
line along which said second edge portion folds in one direction to
the outside edge of said first edge portion and in the other
direction to the outside edge of said second edge portion, said
second score lines lying outside of said first score lines in the
region between the outside edge of said first edge portion and the
line along which said second edge portion folds, said second score
lines lying inside of said first score lines in the region between
the line along which said second edge portion folds and the outside
edge of said second edge portion.
14. The invention defined in claim 13, wherein:
the portion of said first score lines lying between the line along
which said second edge portion folds and the outside edge of said
second edge portion are mutually parallel; and
the portion of said second score lines lying between the line along
which said second edge portion folds and the outside edge of said
second edge portion taper towards each other along straight lines
so that said tab is defined on the exterior surface of said second
edge portion as a triangular area.
15. The invention defined in claim 14, including score lines cut in
the exterior surface of said first edge portion to define a
triangular area therein which is positioned to be in alignment with
said triangular tab area whenever said blank is folded to form a
bacteria impervious enclosure, the triangular area defined on the
exterior surface of said first edge portion corresponding in shape
to said triangular tab area.
Description
BACKGROUND OF THE INVENTION
The present invention relates to instrument packages and more
particularly to an improved package for sterile instruments or
commodities.
Instruments and devices employed in surgery and many other medical
procedures need to be sterilized and maintained bacteria free until
used in order to prevent infections. Accordingly, such instruments
are generally sterilized and stored in packages made of a bacteria
impervious material. Such packages are generally made of a
delaminatable material, like paperboard, through which a selected
gas may be passed to sterilize the instruments in the packages
after they have been sealed.
Such sterile packages must be designed for opening in a rapid
sterile manner so that during surgery, for example, an instrument
may be rapidly removed from its sterile package without
contaminating it.
Heretofore, tear strip arrangements have been devised for opening
sterile packages made of delaminatable materials like paperboard.
The tear strips have generally been formed by scoring the exterior
and interior surfaces of the paperboard to define planes of
cleavage therein along which the tear strips delaminate and the
packages were opened by gripping one end of the tear strips and
pulling. In order to insure that these packages were bacteria
impervious, the tear strip ends which were pulled upon to open the
packages generally had to be adhesively bonded to the packages to
form bacteria tight seals therewith.
Due to the fact that the tear strip ends which were pulled upon
were adhesively bonded to the packages, these tear strip
arrangements frequently malfunctioned, delaminating too high along
planes other than the defined cleavage planes. This improper
delamination was caused due to the fact that the adhesive bonds
between the tear strip ends and the packages were stronger than the
bond between the plies of delaminatable paperboard material from
which the packages were made.
The frequent malfunctioning of the prior art tear strip
arrangements constituted a significant drawback to the use of the
prior art sterile packages since if the tear strips delaminated too
high a layer of paper would be left in the region of the packages
from which the tear strips had been removed. As a consequence, the
packages would not be properly opened and the sterile instruments
could not be easily removed from the sterile packages without
running the risk of contaminating them.
SUMMARY OF THE INVENTION
It is, accordingly, an object of the present invention to provide
an improved sterile package and blank therefor which may be quickly
and easily opened without malfunction so that the sterile contents
of the package may be removed therefrom without being
contaminated.
It is another object of the present invention to provide an
improved sterile package and blank therefor having a tear strip
with an integral folded over tab formed on one end of the tear
strip, the tab being for bonding to the package to form a bacteria
tight seal therewith and for pulling upon to remove the tear strip
to open the package.
In accomplishing these and other objects, there is provided in
accordance with the present invention a sterile package or
container made at least in part of a delaminatable material,
preferably paperboard. The sterile package is made from a folded
blank and has a removable tear strip formed in the delaminatable
material by scoring the exterior and interior surfaces of the blank
so as to define a plane of cleavage along which the tear strip may
be delaminated to open the container. An inwardly folded tab is
formed preferably integral with the tear strip on one end thereof
and the exterior surface of the folded tab is bonded to the package
to make a bacteria tight seal therewith. The sterile package may be
opened by pulling on the tab to remove the tear strip and the end
portion of the tear strip overlapping and adjacent to the folded
tab automatically delaminates along the proper plane of cleavage
since there is no adhesive bond between this end portion of the
tear strip and the sterile package. Any malfunction of the tear
strip is prevented by the glue lap formed by the folded over tab
and is terminated at the edge of this glue lap.
Additional objects of the present invention reside in the specific
construction of the exemplary sterile package and the blank from
which it is formed which are hereinafter particularly described in
the specification and shown in the several drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a partially cut-away perspective view of a portion of a
sterile package according to the present invention;
FIG. 2 is a perspective view as in FIG. 1 illustrating the tear
strip being removed from the sterile package;
FIG. 3 is an exploded perspective view of the sterile package of
FIG. 1 illustrating the tear strip separated therefrom with the
sterile package severed into two portions;
FIG. 4 is a sectional view taken along the line 4--4 of FIG. 1;
FIG. 5 is a sectional view taken along the line 5--5 of FIG. 2;
FIG. 6 is a sectional view taken along the line 6--6 of FIG. 1;
FIG. 7 is a sectional view taken along the line 7--7 of FIG. 2;
and
FIG. 8 is a partially cut-away plan view of the exterior surface of
a blank which may be folded to form the sterile package of FIG.
1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to the drawings in more detail, there is shown in FIG. 1
a sterile package or container generally identified by the numeral
10. The container 10 preferably is a substantially rectangular box
structure having side walls 11-14 and end walls 15, one of which is
shown, and is formed from a blank 16. The blank 16, which is shown
in FIG. 8, is made of a suitable delaminatable material, such as
paperboard, and has an exterior and interior surface. The exterior
surface of the blank 16 is shown in FIG. 8 and the interior surface
of the blank is defined as its other side. The blank 16 shown in
FIG. 8 is cut and scored for forming the rectangular box structure
10.
The blank 16 preferably has longitudinal extending edge portions 17
and 18 which are adhesively bonded together as glue laps to seal
the longitudinal dimension of the box 10 closed, as shown in FIG.
1. The box edge portions 17 and 18 are formed by forming fold or
crease lines 19 and 20, respectively, in the box blank 16. The
crease lines 19 and 20 are preferably mutually parallel and the box
edge portions 17 and 18 are foldable inwardly along these crease
lines like flaps. The crease lines 19 and 20 are also preferably
parallel to the outside edges 21 and 22, respectively, of the blank
edge portions 17 and 18.
A tear strip 25 having ends 26 and 27 with a tab 28 formed on one
end thereof is defined in the side walls 11-14 of the package 10 to
extend entirely around the package circumference. The tear strip
25, its ends 26, 27 and the tab 28 are defined in the package 10 by
cutting pairs of score lines 29 and 30 in the blank 16, as shown in
FIG. 8, thereby to form a plane of cleavage along which the tear
strip delaminates as is hereinafter explained.
The score lines 29 are cut in the interior surface of the blank 16,
are preferably mutually parallel, and are cut to extend from one
longitudinal blank edge 21 to its other edge 22. The score lines 29
preferably extend substantially perpendicular to the blank edges 21
and 22 so that the tear strip 25 lies perpendicular to the
longitudinal dimension of the box 10.
The score lines 30 are cut in the exterior surface of the blank 16
and extend parallel to the score lines 29 from the blank edge 21 to
points 31 on the blank 16. The score lines 30 lie outside of the
score lines 29 in the region on the blank 16 between the edge 21
and the points 31. From the points 31, the score lines 30 are cut
in the exterior surface of the blank 16 to taper towards each other
along straight lines to the blank edge 22. The tapering score lines
30 are preferably cut to intersect the blank fold line 20 at the
points of intersection 32 of the score lines 29 therewith. Thereby,
the portion of the score lines 30 between the points 31 and 32 lie
outside of the score lines 29 while the portion of the score lines
30 between the points 32 and the blank edge 22 lie within the score
lines 29.
As before-mentioned, the tear strip 25 has ends 26 and 27 and a tab
28 formed on one end thereof. As shown in FIG. 8, the tab 28 is
that portion of the blank 16 defined by the score lines 29 and 30
which lies between the fold line 20 and the blank edge 22. The tab
28 is an integral part of the tear strip 25 and is joined with the
tip of the tear strip end 27 at the fold line 20. The tear strip
end 27 is that portion of the tear strip defined by the score lines
29 and 30 which lies between the crease 20 and the points 31 on the
blank. The tear strip end 26 is the portion of the tear strip 25
defined by the score lines 29 and 30 between the blank edge 21 and
the fold line 19.
It is noted that a pair of tapering score lines 33 interconnected
by a transverse score line 34 may be cut in the exterior surface of
the tear strip end 26 as illustrated. The tapering lines 33 are cut
to extend from the points of intersection of the score lines 29
with the fold line 19 to taper towards each other to the blank edge
21. The score line 34 which extends transversely on the tear strip
25 is cut preferably along the fold line 19. The score lines 33 and
34 define a triangular area on the tear strip end 26 which
corresponds in shape to the tapered tab 28 defined by the score
lines 30. It is noted, as hereinafter explained, that the score
lines 33 and 34 may not be desired or necessary in all cases.
The sterile package 10 may be constructed by folding the blank 16
and sealing it along its edges, thereby to form a bateria
impervious enclosure. When folded into the sterile package 10, the
interior surface of the blank edge portion 18 is folded inwardly
against the interior surface of the package wall 14 and the
exterior surfaces of the edge portions 17 and 18 are bonded
together, preferably by use of a suitable adhesive, in a double
layer glue lap arrangement to form a bacteria tight seal.
The exterior surfaces of the edge portions 17 and 18 are bonded
together with the score lines 30 defining the tab 28 aligned with
the tapering score lines 33 on the tear strip end 26. It is noted
that the width of the edge portion 18 is preferably slightly larger
than the width of the edge portion 17 so that the folded over tab
28 defined on edge portion 18 extends slightly beyond the package
wall 11, as shown in FIG. 1, when the edge portions 17 and 18 are
bonded together with their edges 21 and 22 aligned.
In the sterile container 10, the tear strip ends 26 and 27 overlap
each other and are separated by the inwardly folded tab 28. In
order to remove the tear strip 25 from the package 10, the portion
of the tab 28 which extends beyond the box wall 11 is gripped and
pulled away from the box 10.
Pulling on the tab 28 causes the bacteria tight seal between the
exterior surface of the tab 28 and the triangular area defined by
the score lines 33 and 34 on the tear strip end 26 to be broken.
The seal is broken by delamination occurring within the tab 28
along the plane of cleavage defined by the depth of the score lines
29 and 30. It is noted that the score lines 33 and 34 on the tear
strip end 26 function to aid and facilitate the delamination of the
tab 28 from the box 10 when the bacterial tight seal is broken. The
tapered shape of tab 28 makes it easier to delaminate the tab 28
towards its tip. As shown in FIGS. 2 and 3, the tab 28 delaminates
leaving exposed the delaminated surfaces 40 and 41 on the tear
strip end 26 and tab 28, respectively. It is further noted that the
score lines 33 and 34 may not be necessary in all cases and that
while the tapered cut of the tab 28 is preferred other shapes of
tabs could be employed. Preferably, however, the tab 28 is
appropriately shaped so that no lateral delamination is necessary
to delaminate it from the box 10. Any such lateral delamination
would increase the force necessary to delaminate the tab 28 and
restrict the delaminating action.
As the tab 28 is pulled away from the box 10, as shown in FIG. 7,
to break its bacteria tight seal therewith, the tab 28 guides the
delamination of the end 27 of the tear strip 25 from the package
10. The tear strip 25 delaminates along the plane of cleavage
defined by adjacent ones of the score lines 29 and 30, as shown in
FIGS. 4 and 5, leaving exposed the delaminated surfaces 42 and 43
on the box 10 and the tear strip 25, respectively. Since the ends
of the tear strip 25 overlap, removal of the tear strip 25 from the
package 10 automatically separates the package into two portions
10a and 10b, as shown in FIG. 3.
It is noted that the plane of cleavage of the tear strip 25 is
defined by the alignment of the bottoms of the adjacent score lines
29 and 30, and that preferably each of the score lines hereinbefore
described are cut to a depth of approximately one-half of the
thickness of the paperboard blank 16. It is further noted that
since the bacteria tight seal at the end 27 the tear strip is made
by bonding the tab 28 as a glue lap to the package 10 that no
adhesive bond is necessary between the strip end 27 and the package
10 in order to seal the package 10 closed. As a consequence, the
tear strip does not have the tendency to malfunction by
delaminating too high but rather readily delaminates along the
plane of cleavage defined by the score lines 29 and 30.
Additionally, since the delamination of the tab 28 to break the
bacteria seal with the package 10 is a separate delaminating action
distinct from the delamination of the tear strip 25, any
delamination of the tab 28 along a plane other than the cleavage
plane defined by the score line 29 and 30 will have no detrimental
effect on the delamination of the tear strip 25 from the package 10
and further any improper delamination of the tab 28 is terminated
at the edge of the glue lap it forms.
Once the tear strip 25 has been completely removed, as shown in
FIG. 3, a sterile instrument enclosed in the package 10 may be
readily removed therefrom by merely tilting the package portion 10b
so that the instrument slides from the package onto an appropriate
sterile surface, such as a sterile surgical tray. With the tear
strip 25 removed and the box severed into the portions 10a and 10b,
there is no danger of contaminating the sterile instrument since
all edge surfaces of the sterile package 10 which would make
contact with the sterile instrument are sterilized.
Thus there has been provided an improved sterile box having a
readily removable tear strip which delaminates along a designed
plane of cleavage so as to separate the sterile box into at least
two portions, thereby to facilitate the removal of sterile
instruments therefrom without running the risk of contaminating the
sterile instruments. Further, the improved tear strip has a folded
over tab portion formed on one end which may be bonded to make a
bacteria tight seal at the end of the tear strip so as to eliminate
the need for an adhesive bond between the interior of the tear
strip and the package.
Although I have herein shown and described my invention in what I
have conceived to be the most practical and preferred embodiment,
it is recognized that departures may be made therefrom within the
scope of my invention. For example, the folded over tab could be
joined with the tear strip rather than being formed as an integral
part thereof. Further, the tab could be bonded to the package to
form a bacteria tight seal therewith to be detachable therefrom in
a manner other than by being delaminated.
* * * * *