close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3053439

код для вставки
SePt- 11, 1962
c. J. PIERCE, JR
3,053,429
CORNER CONSTRUCTION FOR FOLDING BOXES
Filed Sept. 1, 1960
2 Sheets-Sheet l
-
INVENTOR.
Cbesfer .1 Pierce, Jr.
BYM WM
ATTORNEY
Sept. 11, 1962
3,053,429
c. J. PIERCE, JR
CORNER CONSTRUCTION FOR FOLDING BOXES
Filed Sept. 1, 1960
2 Sheets-Sheet 2'
Fig. 4
INVENTOR.
Chesfer J Pzerce, Jr.
'
BY
‘w Arrow”
United States Patent O??ce
3,053,429
Patented Sept. 11, 1962
1
2
3,053,429
to the vfollowing description taken in connection with the
accompanying drawings forming a part of it in which:
CORNER CONSTRUCTION FOR FOLDING BOXES
Chester J. Pierce, .lr., Palo Alto, Calif., assignor, by mesne .
assignments, to Atlas General Industries, Inc., a cor
poration of Massachusetts
Filed Sept. 1, 1960, Ser. No. 53,524
5 (Ilaims. (Cl. 229-32)
This invention relates to improvements in the corner
construction of gluelessly interlocked folding boxes of
FIG. 1 is a plan view of a corner portion of a box
blank;
FIG. 2 is a perspective view of a partially assembled
corner formed from the blank of FIG. 1;
FIG. 3 is an elevational View of a portion of the corner,
the section being taken on line 3---3r of FIG. 2;
FIG. 4 is a plan view of a corner portion of a modi?ed
blank; and
FIG. 5 is a perspective view of a box corner ‘assembled
the type in which -a lock flap articulated to one wall panel
from the blank of FIG. 4.
is folded over the next wall panel and is partially inserted
In the following description and in the claims various
into a slit in the latter. The lock ?ap is provided with a
details will be identi?ed by speci?c names for conven
locking edge which engages an edge of the slit and thus
15 ience. The names, however, are intended to be generic
prevents withdrawal of the lock flap from the slit.
in their application. Corresponding reference charac
In order to prevent accidental disengagement of the
ters refer to corresponding parts in the several ?gures of
lock, the lock ?ap may be provided with a projecting por
the drawings.
tion extending beyond the con?nes of the de?ectable
The drawings accompanying, ‘and forming part of, this
tongue formed in the slotted wall panel, so that the pro
jecting portion must be forceably moved through the slit 20 speci?cation disclose certain speci?c details of construc
tion for the purpose of explaining of the basic aspects of
into the interior of the box in which position the projec
this invention, but it is understood that structural details
tion forms a safety catch resisting accidental disengage
may be modi?ed in various respects without departure
ment. Locks of this type form the subject matter of the
from the principles of the invention and that the inven
patent to R. B. Meller, 2,580,181, dated December 25,
1951. These locks offer the further advantage of permit 25 tion may be incorporated in other structural forms than
shown.
ting rapid forming and locking by an automatic mecha
The corner portion of the folding box blank A com
nism as disclosed in the patent to E. I. Pagendarm, 2,5 80,
prises a main panel 11 to which a ?rst wall panel 12 is
189, dated December 25, 1951. The mechanism com
articulated along a ?rst fold line 13. The main panel
prises basically a blank folding die and a plunger which
forces the originally ?at blank through the die, thereby 30 may represent the bottom of a box body or the top panel
of a cover, or ‘any other portion of a box.
forming and engaging the corners. The plunger is ?tted
A second wall panel 14 is articulated to the main panel
with movable ?ngers which ?rst open the wall slits, grasp
11 along a second fold line 15 extending at an angle to
the portion of the lock flap on which the safety catch is
the fold line 13 which it meets at a point of intersection
formed, and then pull the flap portion to the inside of the
box. Thereafter the completed box is stripped off the 35 16. A look flap 17 is articulated to the second panel 14
along a corner fold line .18.
>
plunger. This requires that the lock ?aps are so formed
An internal cut 19 is formed in the ?rst panel 12 and
and the safety catches so disposed with respect to the
comprises a top portion 2t) substantially parallel‘ to the
movable ?ngers that the box is readily disengaged. It
?rst ‘fold line 13, ‘a ?rst slanted portion 21 ‘downwardly
follows that the safety catch is only practical if it is so
shaped and placed that the forming and removal of the
extending from the top portion 241 in the general direction
box is not interfered with.
The illustrations in the aforesaid Meller patent show
of the box corner point 16, and a second slanted portion
22 extending at an angle to the ?rst slanted portion 21.
The internal cut 19 delineates an internal tongue 23 in the
the lock tip which represents the safety catch as extend
panel 12 which yields readily to a force exerted in a di
ing above the internal out which forms the internal tongue
45 rection normal to the surface of the board in order to
in the side wall.
open the cut '19 and permit the lock flap 17 to enter.
If boxes ‘are extremely shallow, the space available for
The lock ?ap 17 has an angular external cut 24 ex
the internal cut and the lock tip thereabove is so limited
tending into it from its top edge 25. The cut comprises
that it is di?icult to accommodate both within the limited
a first portion 26 which may be substantially upright with
height of the box wall without reducing the size of the
50 respect to the main panel ‘11 in the assembled corner or,
in other words, substantially parallel to the corner fold
The present invention provides an improved form of
line 18. A second portion 27 of the cut 24 extends at
lock in which the entire height of the wall is available
an angle to portion 26 ‘and preferably runs in the general
for the lock proper and in which the safety catch is so
direction towards the corner point 16.
placed ‘as not to add to the height of the construction,
yet so located as to be operable by the ?ngers of the 55 v‘In forming the box corner A’, the internal tongue 23
is outwardly de?ected and the lock ?ap inserted into the
plunger and to permit withdrawal of the box therefrom.
opened slit 19. This operation, per se, leaves a portion
If the box is ?tted with a flap extending from the top
28 of the lock ?ap outside the panel. This portion is
of the slotted wall, for example a dust ?ap, the internal
bounded by the top edge 25 of the lock ?ap 17 and
cut may extend the full height of the wall up to the hinge
60 the upright cut portion 26.
line of the ?ap.
FIG. 2 shows the corner A’ partially completed except
The various features and vadvantages of this invention
for the position of the tip 28 which still lies on the
will appear more fully from the detailed description
outside of the wall panel 12. The assembly mechanism
which follows accompanied by drawings showing, for
next engages the end of the lock ?ap 17 and ?exes it to
the purpose of illustration, preferred embodiments of this
invention. The invention also resides in certain new and 65 the inside of the box corner, whereby the tip 28 re
siliently snaps past the portion 21 of the cut into the
original features of construction and combination of ele
position in which it is shown in FIG. 3. -In the fully
ments hereinafter set forth and claimed.
locked position a portion of the internal cut 21 engages
Although the characteristic ‘features of this invention
a portion of the external cut 27 along an engagement
which are believed to be novel will be particularly point
ed out in the claims appended hereto, the invention itself, 70 zone 29 which may be made longer or shorter, as de
sired, by suitable con?guration of the cutS. The engage
its objects and advantages, and the manner in which it
ment zone lies below the tip 28 which acts as a safety
may be carried out may be better understood by referring
lock to such small dimensions as to make it unreliable.
3,053,429
3
A.
catch to prevent accidental disengagement of the inter
locking cut portions 21 and 27.
As described in greater detail in the aforementioned
Pagendarm patent, the device for opening the internal
of the external cut engages said ?rst slanted portion of
the internal cut.
2. The corner construction for folding boxes which
comprises a main panel; a ?rst wall panel articulated to
the main panel along a ?rst fold line; a second wall panel
articulated to the main panel along a second fold line
extending at an angle to said ?rst fold line; a lock ?ap
cut 19 in the wall panel 12 may be a movable ?nger or
blade on the ‘box forming plunger which is ?rst pro
jected to ?ex the internal tongue 23 outwardly so as to
open the cut 19 and permit the lock flap 17 partially
to enter underneath the ‘blade or ?nger indicated in FIG.
articulated to said second wall panel along a corner fold
line upwardly extending from the intersection of said ?rst
2. As soon as the corner is squared, the ?nger or blade 10 and second fold line in the assembled corner, said ?rst
wall panel having an internal cut therein forming an in
30 is pulled to the inside of the corner, thus forcing the
It is readily
ternal tongue pointing towards the corner, said internal
seen from FIG. 2 that subsequent disengagement of the
box from the plunger is not hindered in any way ‘by either
the lock ?ap or its safety catch tip 28. The direction
of travel of the blade 30 relatively to the 'box is indicated
by broken lines 31 in FIG. 2.
cut comprising a top portion substantially parallel to said
?rst fold line, a ?rst slanted cut portion downwardly ex
tip 28 to move into safety catch position.
FIG. 4 shows the corner portion of a modi?ed blank
corresponding in most details to the blank portion shown
in FIG. 1. In order to avoid the necessity of describing
corresponding blank portions, numerals are applied to
'blank B which differ from those in blank A by 100.
Thus main panel 111 corresponds to main panel 11, wall
panel 112 corresponds to panel 12, etc. The following
distinctions should be noted. The wall panel 112 has
a dust ?ap 32 articulated to it along a fold line 33. The
internal cut 119 has a top portion 120 which coincides
tending from said top portion towards said intersection,
and a second slanted portion below the ?rst slanted portion
extending at an angle to the ?rst slanted portion, the lock
flap having an external cut extending into it from its top
edge, said external cut being angular and coinciding with
in one portion of its length with the said ?rst slanted
portion of said internal cut, another portion of the ex
ternal cut forming a lock tip above said coinciding por
tion, said tip overlying said ?rst panel within the area be
tween said internal tongue and said corner fold line, the
said tip extending no higher than said top portion and
being resiliently forceable from a position outside the
?rst panel through the internal cut into a position in which
it overlies the ?rst panel on the inside of the corner in
which position the said coinciding portion of the external
panel 112 for the internal cut 119.
The panel 114 is in the nature of a box back panel 30 cut engages said ?rst slanted portion of the internal out
with the fold line 33, thus utilizing the full height of the
and has a cover panel 34 articulated to it along a cover
below said tip.
fold line 35. The cover panel 34 is provided with a side
3. The corner for ‘folding boxes which comprises a
main panel; a ?rst wall panel articulated to the main panel
‘along a ?rst fold line; a second wall panel articulated to
the main panel along a second fold line extending at an
angle to said ?rst fold line; a lock ?ap articulated to said
second wall panel along a corner fold line upwardly ex
tending from the intersection of said ?rst and second fold
line in the assembled corner, said ?rst wall panel having
?ap or charlotte 36 articulated to the cover panel along a
charlotte fold line 37.
The fully locked corner B’ is shown in FIG. 5.
In
the illustrated condition the dust ?ap 32 is still upright
andithe charlotte 36 is still extended, it being understood
that ‘both will be folded when the box is closed after
?lling.
A typical box of which FIGS. 4 and 5 represent 410 an internal cut therein forming an internal tongue point
ing towards the corner, said internal cut comprising a top
portion substantially parallel to said ?rst fold line, a ?rst
10 x 61/2 inches and a height of only 1/2 inch, making it
slanted cut portion downwardly extending from said top
a rather shallow box. It is reliably assembled by the
portion towards said intersection, and a second slanted
corner lock construction herein disclosed.
portion below the ?rst slanted portion extending at an
Obviously, the con?guration of the locking cuts may
angle to said ?rst slanted portion, the lock ?ap having an
be modi?ed without departure from the spirit of the
external cut extending into it from its top edge, said top
invention.
edge being disposed substantially parallel to said ?rst fold
<Whatiis claimed is:
line, said external cut comprising two angularly disposed
1. The corner construction for folding boxes which
portions, one of which points in the general direction of
comprisesla main panel; a ?rst wall panel articulated to
said intersection, coincides with at least a portion of said
the mainpanel along a ?rst fold line; a second wall panel
?rst slanted portion of the internal cut and constituting an
articulated/to the main panel along a second fold line ex
engagement portion, the other portion of the external cut
tending at an angle to said ?rst fold line; a lock ?ap ar
a corner has a bottom dimension of approximately
ticulated to said second wall panel along a corner fold
line upwardly extending from the intersection of said
?rst and second fold line in the assembled corner, said
?rst wall panel having an internal cut therein forming an
internal tongue pointing towards the corner, said internal
cut comprising a top portion substantially parallel to
said ?rst fold line, a ?rst slanted cut portion downwardly
extending from said top portion towards said intersection,
extending substantially upright with respect to the said
?rst fold line and forming the front edge of a lock tip, the
top edge of the lock tip being formed by the said top edge
of the lock ?ap, the lock tip overlying the said ?rst panel
within the area between said internal tongue and said
corner fold line, the said tip being resiliently forceable
60 from a position outside the said ?rst panel through the
internal cut into a position on the inside of the box corner
and a secondaslanted portion below the ?rst slanted por
tion extending ‘at an angle to the ?rst slanted portion,
the lock ?ap having an external cut extending into it
in which position the said engagement portion of the ex
ternal cut engages the ?rst slanted portion of the internal
from its top edge, said external cut being angular and
portion.
coinciding within one portion of its length with a por
cut below said tip, and the tip projects beyond the said
slanted ?rst internal cut portion above said engagement
4. The corner construction for folding boxes which
comprises a main panel; a ?rst wall panel articulated to
cut forming a lock tip overlying the said ?rst panel with—
the main panel along a ?rst fold line; a second wall panel
in the varea between said internal tongue and said corner 70 articulated to the main panel along a second fold line
fold line, the said tip extending no higher than said top
extending at an angle to said ?rst fold line; a top flap
portion and being resiliently forceable from a position
articulated to the top of said ?rst panel along a top ?ap
outside the ?rst panel through the internal cut into a
fold'line substantially parallel to said ?rst fold line; a
position in which it overlies the ?rst panel on the inside
lock ?ap articulated to said second wall panel along a
of the corner in which position the said coinciding portion 75 corner fold line upwardly extending from the intersection
tionof said internal cut, another portion of the external
3,053,429
5
of said ?rst and second fold line in the assembled corner,
said ?rst wall panel having an internal cut therein form
ing an internal tongue pointing towards the corner, said
internal cut comprising a top portion substantially coin
6
said ?rst wall panel having an internal cut therein form
ing an internal tongue pointing to the corner, said internal
cut comprising a top’ portion substantially coinciding with
said top ?ap fold line, a ?rst slanted portion downwardly
extending from said top portion towards said intersection
ciding with said top ?ap fold line, a ?rst slanted cut portion
and a second slanted portion below said ?rst slanted por
downwardly extending from said top portion towards said
tion extending at an angle to said ?rst slanted portion,
intersection, and a second slanted portion below the ?rst
the lock ?ap having an external cut extending into it from
slanted portion extending at an angle to the ?rst slanted
its top edge, said top edge being disposed substantially
portion, the lock ?ap having ‘an external cut extending
parallel
to said ?rst fold line, said external cut comprising
into it from its top edge, said top edge being disposed sub 10
two angularly disposed portions, one of which points in
stantially parallel to said ?rst fold line, said external out
the general direction of said intersection, coincides along
being angular and coinciding Within one lineal portion of
a lineal portion with at least a, portion of said ?rst slanted
its length with a portion of said internal out, another por
portion of the internal cut and constitutes an engagement
tion of the external cut forming a lock tip overlying the
said ?rst panel within the area between said internal 15 portion, the other portion of the external cut extending
substantially upright with respect to the said ?rst fold line
tongue and said corner fold line, the said tip being re
and forming the front edge of a lock tip, the top edge of
siliently forceable from a position outside the said ?rst
the lock tip being formed by the said top edge of the lock
panel through the internal cut into a position on the inside
flap, the lock tip overlying the said ?rst panel within the
of the box corner in which position a portion of the ex
ternal out below said tip engages at least a portion of the 20 area between said internal tongue and said corner fold
said ?rst slanted portion, and the tip projects beyond the
line, the said tip being resiliently forceable from a posi
tion outside the said ?rst panel through the internal cut
said slanted ?rst internal cut portion above said engage
into a position on the inside of the box corner in which
ment portion.
position the said engagement portion of the external cut
5. The corner construction for folding boxes which
comprises a, main panel; a ?rst wall panel articulated to 25 engages the ?rst slanted portion of the internal out below
said tip, and the tip projects beyond the said slanted ?rst
the main panel along a ?rst fold line; a second wall panel
internal cut portion above said engagement portion.
articulated to the main panel along a second fold line
extending at an angle to said ?rst fold line; a top flap
References Cited in the ?le of this patent
articulated to the top of said ?rst panel along a top ?ap
UNITED STATES PATENTS
fold line substantially parallel to said ?rst fold line; a lock
1,544,311
Gra?enberger ________ __ June 30, 1925
flap articulated to said second wall panel along a corner
2,646,916
Meller _______________ __ July 28, 1953
fold line upwardly extending from the intersection of said
2,712,409
Buttery _______________ __ July 5, 1955
?rst and second fold line in the assembled corner, the
Документ
Категория
Без категории
Просмотров
0
Размер файла
533 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа