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Патент USA US3070814

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Jan. l, 1963
W. SCHAFROTH
3,070,801 »
FLAP LIFTER
~
2 Sheets-Sheet 1
FIG?
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Jam.- 1, 1963
w. scHAFRoTH
3,070,801
FLAP LIFTER
Filed NOV. 8, 1961
2 Sheets-«Sheet 2
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3,070,801
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Patented `Ian. 1, 1953
1
3,070,801
Werner Schafroth, Driekoningenstraat 150,
FLA? LIFTER
St. Niklass-Waas, Belgium
Filed Nov. 8, 1961, Ser. No. 150,989
4 Claims. ttCl. 1--260)
2
FIG. 2 is a bottom view thereof,
FIG. 3 is a front end yView thereof looking toward
the blade,
FIG. 4 is a fragmentary enlarged side elevational view
of the forward portion thereof,
FIG. 5 is a side elevational view, partly in section,
'showing the inclined flanges positioned ñatly on the outer
This invention relates to a flap Ilifter for cartons or
Hap of a carton with the blade receiving the inner edge
containers in general, and in particular, relates to a flap
‘of the downturned inner flap,
lifter adapted to be used in combination with a stapling 10
FIG. 6 is a View similar to FIG. 5, but after the base
`machine of the retractable anvil type.
portion has been pivoted downwardly to raise the blade
Staples are commonly used for closing cartons or master
and the inner flap,
FIG. 7 is a perspective View showing the flap lifter
Vpositioned with its blade between the central longitudinal
the anvil projects from the bottom edge of the stapling 15 7slot between the side cover ñaps of the carton and with
machine itself and penetrates the material to be sta-pled,
a stapling machine thereon, and
shipping containers. The staples are often driven by
stapling machines of the retractable anvil type wherein
so that the staple is clinched from the same side Ifrom
which it is driven. Stapling machines of this type are
FIG. 8 is a view similar to that of FIG. 7 with the
stapling machine shown after it has been moved for
shown in the Schafroth Patents No. 2,896,502 dated Au
wardly or leftwardly on the base portion through the
gust 4, 1959, Design No. 183,948 dated November 18, 20 cut out portion.
1958, Design No. 180,104 dated April 16, 1957, No.
Referring now to the drawings, in detail, it will be
2,778,022 dated January 22, 1957, No. 2,770,804 dated
seen that the flap lifter 1, or the embodiments of the in
November 20, 1956, No. 2,764,758 dated October 2, 1956,
vention which has been illustrated, comprises a base por
and others.
tion 2 with a blade 3 thereon. The iiap lifter 1 is made
Cartons which are to «be stapled are frequently of the 25 preferably from steel or any other suitable metal or hard
regular slotted type and are used to pack all sorts of
material.
items which may or may not lill the entire carton. At
The base 2 is substantially rectangular and has a for~
times it is necessary to make certain that the inner ñaps
ward portion 4 with upturned flanges or tongues 5 with
are in dat juxtaposed position with respect to the outer
an opening or cut out portion 6 therebetween. The base
ñaps to which they are to be secured by staples. The 30 2 has a dat upper 'surface 7 and a flat lower surface S.
present flap lifter is designed to be used to make certain
‘The upturned flanges 5 are positioned preferably at an
that the inner flaps lie ilatwise against the inner surfaces
iacute angle A, preferably of about 30° to the plane of the
of the outer flaps when the carton is «being set up to re
base 2. The flanges 5 are spaced apart and have forward
ceive goods, and also, when the carton is partially or fully
edges 9 and inner edges _10, there being a forward edge
loaded and the cover flaps are being stapled.
35 11 on the ilat lbase 2 between said inner edges 10. The
In the past, other devices have been used to lift the
flap lifter 1 may be provided with a hole 12 or other
inner flaps of cartons, but these devices do not have the
advantages of the present invention. Such prior devices
'suitable hanging means if desired.
The blade 3 is secured to the lower surface 8‘ of the
either penetrated the wall portion of the carton to be
base 2 at a point slightly rearwardly of the forward edge
stapled, or lifted the inner flap in an uncontrolled or pos 40 11 of said base 2. The blade 3 has a `securing portion
sibly damaging manner and did not aid the stapling ma~
One of the principle objects of the present invention is
"13 which is welded or suitably secured in some manner
Yto the base 2. The blade 3 has a forward wall 14 perpen
dicular to the base 2 and at a predetermined distance rear
to provide a flap lifter which is also used as a `base and
wardly of the forward edges 9 of the flanges S, and a
chine and were an obstacle to it in some positions.
a positioner for a stapling machine. Another object is 45 straight upper edge 15 which terminates in a curved for
to provide a flap lifter with a predetermined angle to the
ward edge 16. The upper edge ‘1S of the blade 3 is sub
flap lifting blade so as to pivot the inner ñap upwardly
stantially parallel to the lower surface 8 of the base 2,
into flat position underneath the outer flap, and to receive
but can lbe at a slightly -downward »angle if desired. The
and provide a base -for the stapling machine, which is to
blade 3 is positioned preferably midway between the
drive and clinch the staples.
50 inner edges 10 of the upturned flanges 5. The forward
Another object is to provide a flap lifter which is rela
portion 4 ofthe base 2, the forward wall 14 and the upper
tively simple and cheap to make and which has predeter
edge 15 -of the blade 3 ‘form a pocket `17 into which the
mined angles to insure proper operation. Another object
inner flap of a carton may extend.
is to provide a flap lifter which forms a base for the
The flap lifter 1 is made preferably from steel. It has
stapling machine which is to drive the staples.
55 been found that a base 2 of approximately 41/2 by 6 inches
These and other lobjects and advantages will become
with a blade 3 extending about 2 inches forwardly from
apparent hereinafter.
the edge 11 of the ybase 2 gives satisfactory results for
The invention is embodied in a ñap lifter comprising a
Imost kinds and sizes of cartons.
base portion with an upwardly inclined forward portion
`In operation, the flap lifter 1 may be used to set up
having an opening therein for receiving a stapling 1na~ 60 and staple the bottom of a carton 18 as shown in FIGS.
chine, said 4base portion having a blade secured thereto,
7 and 8. It may also be used to properly position and
said blade extending forwardly from the base portion and
staple the inner and outer cover flaps of a partially or
having an upper edge substantially parallel to said base
fully loaded carton.
,
portion and positioned below the plane of the lower sur
Referring to FIGS. 5 and 6, it will be seen that the flap
face thereof.
65 lifter 1 is used by inserting the blade 3 in the longitudinal
The invention also consists in the parts and in the ar
central slot 19 between the side flaps 20 and moving the
rangement and combination »of parts herein described and
l'blade 3 into the carton at an angle of 30° or more to the
claimed. In the accompanying drawings, which form part
horizontal until the flanges 5 contact the side flaps 20.
of this specification and wherein in like numerals refer
The flanges 5 are brought into flat contacting relation with
to like parts wherever they occur:
70 said side flaps 20 and are then slid forwardly, or left
FIG. 1 is a top plan view of a flap lifter embodying the
wardly as shown in FIG. 5, thereby causing the down
present invention,
turned inner end »ilap 21 to be contacted by the blade 3
3,070,801
da
and moved upwardly into flat contacting relation with
the outer side cover flaps 20. This is accomplished by
moving the flap lifter 1 leftwardly so that the inner edge
22 of the inner end flap 21 rides up on the upper edge
15 of the blade 3 until it approaches or contacts the for
4
upper edge being spaced lbelow the plane of said lower
surface of said base, said forward wall being positioned
a predetermined distance rearwardly of the forward edges
of said flanges.
2. A ilap lifter comprising a base and a blade extend
ward wall 14 thereof, or it can be accomplished by sim
ing therefrom, said base being substantially rectangular
ply pivoting the base portion 2 downwardly thereby ro
tating the blade 3 upwardly so that the upper edge 15
a pair of spaced upturned flanges along the forward por
and having ñat upper and lower surfaces, said base having
tion thereof with an opening therebetween, said upturned
In practice, the operator moves the flap lifter 1 so 10 flanges being approximately at a 30° angle with said
is substantially horizontal.
rapidly and in such a manner that the inner ñaps 2l are
usually raised by a combination of both the forward
movement and the pivoting of the base portion 2 to the
position shown in FIG. 6. In this position, the flaps of
the carton, both inner and outer, are in proper position
to be stapled. Furthermore, the ñap lifter 1 is positioned
on the carton 18 in such a manner that the inner edge 22
of the inner flap 21 is in a known position. The portable
stapling machine 23 is then moved into its proper posi»
tion on the ñap lifter 1 as shown in FIG. 7. In this posi
tion, the flap lifter 1 acts as a base or platform for the
stapling machine 23 and also as a guide for properly
base, said blade being secured to the lower surface of
said base, said blade extending forwardly from said open
ing midway between said flanges, said blade having a
forward wall, an upper edge, and a forward edge, said
upper edge being substantially parallel to said base and
spaced below the plane of said lower surface of said base,
said forward wall being positioned a predetermined dis
tance rearwardly of the forward edges of said flanges.
3. A ñap lifter comprising a bases and a blade extend
ing therefrom, said base being substantially rectangular
and having flat upper and lower surfaces, said base hav
ing a pair of spaced upturned flanges along the forward
portion thereof with an opening therebetween, said up
positioning the first staple to be driven, which is usually
turned flanges being approximately at a 30° angle with
the staple most inwardly from the end edge 24 of the
carton. In this position, the magazine 25 of the stapling 25 said base, said blade being secured to the lower surface
of said base perpendicular thereto, said blade extending
machine 23 rests flatly on the base 2 of the flap lifter 1
forwardly from said opening midway between said flanges,
and extends through the cut out portion 6 between the
said blade having a forward wall, an upper edge, and a
upturned ñanges 5. The back of the head 26 of the
rounded forward edge, said upper edge being substantially
stapling machine 23 is positioned close or in contacting
relation with the forward edges 9 of the flanges 5 which 30 parallel to said base, said upper edge being spaced below
the plane of said lower surface of said base, said forward
are a predetermined distance forwardly of the forward
wall being positioned a predetermined distance rearwardly
wall 14 of the blade 3 and therefore the same distance
of the forward edges of said ñanges.
forwardly of inner edge 23 of the inner flap 21, thereby
4. A flap lifter comprising a base and a blade secured
measuring the precise spot for the innermost staple. The
35 to said base, said base being substantially rectangular and
staple is then driven.
having ñat upper and lower surfaces, said base having a
The stapling machine 23 is then slid forwardly to drive
pair of spaced upturned flanges along the forward portion
the next staple, as shown in FIG. 8. Thus, the ilap lifter
thereof with an opening therebetween, said upturned
1 not only serves to properly position the inner flap 21
flanges being approximately at a 30° angle with said base,
but also serves as a base and guide for the stapling ma
40 said blade being secured to the lower surface of said base
chine 23 which drives the staples.
at a point rearwardly of the forward edge of said base,
This invention is intended to cover all changes and
said blade extending forwardly from said opening midway
modifications of the example of the invention herein
between said flanges, said blade having a forward wall,
chosen for purposes of the disclosure, which do not de
an upper edge, and a rounded forward edge, said upper
part from the spirit and scope of the invention.
edge being substantially parallel to said base, said upper
What I claim is:
edge being spaced below the plane of said lower surface
1. A ñap lifter comprising a base and a blade secured
of said base, Said forward wall being positioned a pre
to said base, said base having fiat upper and lower sur~
determined distance rearwardly of the forward edges of
faces, said base having upturned flanges along the for
said flanges and the forward edge of said base to form
ward portion thereof with an opening therebetween, said
upturned flanges being positioned at an acute angle with 50 a pocket between said blade and said base.
respect to said base, said blade being secured toA said base
References Cited in the file of this patent
rearwardly of said forward portion of said base and ex
UNITED STATES PATENTS
tending forwardly from said opening, said blade having
Yollans _____________ _.. Apr. 25, 1961
a forward wall, an upper edge, and a forward edge, said
2,980,913
upper edge being substantially parallel to said base, said
3,044,073
Law ________________ -_ July 17, 1962
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