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Патент USA US3069834

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Dec. 25, 1962
H. P. CURLEE ETAL
3,069,824
WRAPPING MACHINE
Filed Dec. 1, 1960
2 Sheets-Sheet 1
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Dec- 25,1962
‘H. P. CURLEE ET AL
3,069,824
WRAPPING MACHINE
Filed Dec. 1, 1960
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INVENTORS
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Harvey P Carlee
RzchardECurlee
BY
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‘
7’ e
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317053516
United States Patent 0
1
3,069,824
Fr‘
ICC
Patented Dec. 25, 1962
2.
strip 140 of material against the front of the stack. Each
3,069,824
WRAPPING MACHINE
Harvey P. Curlee and Richard E. Curlee, Cary, N.C., as
signors to Curlee Machinery Company, 11162., Cary, NC.
Filed Dec. 1, 1960, Ser. No. 73,009
6 Claims. (Cl. 53—133)
cup 16 is fastened to an intermediately moving conveyor
chain 20 which then moves to the right to station B and in
so doing moves the stack across the face of a stationary
plate 22 which folds the remaining outwardly projecting
strip 14d of material over the previously folded strip and
against the front of the stack. The cup then moves to
Station C along a heat sealing iron 24 which presses
This invention relates to a wrapping machine. In par
against the front of the stack and heat seals the two folded
ticular, the invention is directed to the automatic wrap
ping of baked goods, such a stacks of cookies or peanut 10 front end portions of the wrapper, as schematically shown
in FIGURE 1b. Further movement of the cup brings it
butter sandwiches.
to station D where, at a time when the cup 16 is sta
- The object of the invention is to produce a simple
wrapping mechanism which is operable at relatively high
tionary, a plunger 26 pushes the partially wrapped stack
‘a, ?nger pull for opening the package.
material strikes the leading edge 32 of plates 28, the
out of cup 16 and through station E which is composed
speeds, to produce a novel wrapper forming cup, and to
produce a'means of leaving unsealed the tip of a tri' 15 of a pair of spaced plates 23, each containing a curved
slot 30 and an open slot 31. As the projecting wrapping
angular ?ap of the ?nished wrapper package for forming
lapped strips 14c and 14d are folded down to make a
In general, these and other objects of the invention are
flap Me on each of the upper and lower sides of the
obtained by means of a horizontal conveyor system cou~
pled with means for moving stacks of articles into and 20 stack, and the righthand upwardly projecting flap 14]‘ in
passing through slot 30 is folded down so that the wrap
out of ?ap forming cups and a heating and sealing iron.
per has the appearance indicated in FIGURE 10. Flaps
A sheet of wrapping material composed of cellophane or
14g pass unfolded through slot 31 and remain so as the
the like is pushed by a stack of articles into a cup in order
package is pushed into station F consisting of the ?nal
vto form an initial U-shaped fold‘ around the back and
‘sides of the stack and simultaneously fold down portions 25 heating iron 34. This heating iron has slots 36‘ for re
ceiving the upper and lower extending ?aps 145;. A
of the top and bottom flaps. A moving plate then closes
plunger 40 then pushes the stack to the left and out of
one front ?ap against the front face of the package. The
the iron, whereupon the remaining ?aps 14g are folded
cup‘is then moved to ‘wipe the front ?ap across a heating
down and sealed against the top and bottom of the stack,
iron to seal these ?aps. The partially wrapped stack is
then pushed out of the cup and between slotted plates 30 except for the tips Iii/z of the flaps ‘which remain un
sealed to provide ?nger pulls, as indicated in the ?nished
which fold down one of the remaining triangularly shaped
wrapped package shown in FiGURE ld. Conveyor chain
top and bottom flaps, respectively, and into a heating
23 is an endless conveyor positioned in a vertical plane
iron. The stacks are then immediately pushed out of the
so that the cups travel along horizontal reaches of the
heating iron, and in so doing, the ?nal top and bottom
triangularly shaped ?aps are folded down and sealed ex 35 chain.
As shown in FIGURES 2 to 5, each of the cups i6 is
cept for the tips of the flaps which are left unsealed in
composed of a channel-shaped base block 50 which is
order to provide ?nger pulls for opening the package by
adapted to be secured to chain 2%. A metal base plate
the ultimate user.
The means by which the objects of the invention are
obtained are described more fully with reference to the
52 extends across the top of block 55} and is riveted there
to. Plate 52 has one end re-bent to form a spring abut
ment ?ange 54. A bell crank 56 is pivotally fastened
by bolt 58 to plate 52 and base block 5%.. ,One arm 60
of bell crank 56 is held urged to the left against the stop
machine;
’
61 by means of the wire spring 62. On the free end of
FIGURES 1a to 1d are schematic views showing the
45 arm 60 is a vertically extending post 64; to which is fastened
‘status of the wrapper on the stack at various stations in
a side plate 66, which is movable with arm 60. Opposite
the apparatus;
arm an is a stationary arm 70‘ ?xed to plate 52 which is
FIGURE 2 is a plan view of the primary wrapping
accompanying drawings, in which:
FIGURE 1 is a diagrammatic plan view of the wrapping
extended into a vertical post '72 and to which is secured
cup;
a stationary side plate '74.
FIGURE 3 is a front view of FIGURE 2;
50
Cup 16 is completed by an upper plate and a lower
FIGURE 4 is a cross-sectional view on the line 4-——4
of FIGURE 3;
FIGURE 5 is a diagrammatic view showing the cup of
FIGURES 2 to 4 in partially open position; and
plate. The stationary lower plate “at; is fastened by screws
or the like to the plate 52. This plate has upwardly
curved side ?anges 82 for the purpose of guiding the
wrapping material. For mounting the upper plate 84,
FIGURE 6 is a front view of the ?nal heating and 55
a right-angled arm 36 is secured at one end by clamp
87 to the top of post 72 and has its free arm 88 extending
across the width of the cup. Upper plate 84- has integral
or the like are transported with intermittent movement
therewith a pair of cars £210 which have aligned holes by
on a conveyor chain 11 to station A of the wrapping
machine. At, this station, the stack 10 is pushed by a 60 means of which plate 84 is pivotally hung on arm 88.
Fixed to arm 88 and between the cars 90 is a block 92.
plunger 12 into a sheet of wrapping material 14, and to
gether with the sheet of material into a primary wrapping
Wire spring 94 is fastened to this block and bears upon
cup 16 so that the sheet of material has a U-shaped form
the upper surface of plate 84 so as to urge the portion
covering the back and sides of the stack of cookies. At
of the plate 34 lying between the side plates 65 and 74
the same time, the upper and lower portions 14a and 14b
65 in a downward direction. Plate 84 has a cam engage
of the back panel of the wrapper are folded down so that
able rear portion 84a and downwardly curved side edges
the shape of the wrapper is that as indicated in FIGURE
85 which also function as wrapping material guides.
la. The details of the operation of this cup are herein
The purpose of the movable side plates 66 and the
after more fully described with reference to FIGURES
spring-pressed upper plate 84 is for stopping the stack
2 to 5. After the stack has been thus partially wrapped, 70 being pushed into cup 16 while initially forming the
a plate 18 moves to the right across the front of the stack
wrapping material around the stack. As shown in FIG
in the cup and serves to fold the outwardly projecting
URE 1, as the cup 16 reaches station A, the rear portion
sealing iron of FIGURE 1.
As shown in FIGURE 1, stacks 10 of crackers, cookies,
3,069,824
3
84a of plate 84 passes beneath a stationary cam 100 and
is pressed downwardly thereby to lift upwardly the cup
portion of plate 84. Then immediately before plunger 12
pushes against stack it}, a plunger 102 moves into contact
with the arm 56a of crank 56 to push the arm toward
4
1. A wrapper forming cup for a wrapping machine
comprising a base block adapted to be attached to a con
veyor chain, a pair of spaced posts joined to said base
block, a pair of side plates attached to said posts with at
least one post and its side plate being movable with re
spect to the other side plate, a bottom plate secured to
said base block and extending between said side plates
and spaced therefrom, a top plate co-extensive with said
bottom plate, the spaces between the side, top and bottom
the cup and thus move side plate 66 outwardly. Plunger
102 is timed so that when the stack 10' has advanced
about two-thirds of the distance into the cup, plunger
102 is retracted and side plate 66 snapped closed by the
action of spring 62. The effect of this is to slow the 10 plates being adapted to receive ?aps extending outwardly
movement of the stack so that the stack will be stopped
of the plates from top, bottom, and side wrapper panels
when it reaches the rear end of the side plates. Other
formed as a ?at sheet of wrapping material is pushed
wise the stack due to its inertia would be pushed out of
by the article being wrapped between said side, top and
the open rear end of the cup. At the same time, the sheet
bottom plates, and means for hingedly supporting said
of wrapping material 14 is drawn snugly and tautly across 15 top plate on said base block for holding down the top
the back of the stack and along the sides thereof. Also,
wrapper panel on the article being enclosed by the wrap
bottom panel 141) of the wrapper is folded in across the
ping material.
bottom of the stack by means of the bottom plate 80,
2. A wrapper forming cup as in claim 1, said top plate
while the top flap panel 14a of the wrapping material is
having a cam follower extension, and spring means at
brought downwardly almost into contact with the top of 20 tached to said top plate for urging said top plate toward
the stack by means of the top plate 84. After folding
plate 18 has been activated to form front panel 140, cup
16 is advanced to the right in FIGURE 1 whereupon top
plate rear portion 84a escapes from beneath cam 100
said bottom plate.
3. A wrapper forming cup as in claim 2, further com
prising a bell crank pivotally secured to said base block
and movably supporting said movable post and its side
and the top plate 84 snaps down under the action of spring 25 late.
94 so as to close the top flap panel 14a of the Wrapping
p 4. A wrapper forming cup as in claim 3, said means for
material against the top of the stack. The overall elfect
of this is to produce by one operation of cup 16 the
hingedly supporting said top plate comprising an arm fas
tened to the top of one of said posts and extending
across said bottom plate, and ears joined to said top plate
enclosing of the back and sides of the stack 10‘ with
wrapping material and at the same time produce the initial 30 and pivotally mounted on said arm.
folding of the top and bottom flap panel portions of the
wrapping material.
5. A wrapping machine comprising an article receiving
cup having two side plates, top and bottom plates and
When the stack reaches station F, only one upper and
opened opposite ends, means for moving the top plate
one lower flap 14g needs to be folded and sealed. As
and one side plate for restraining wrapping material par
shown in FIGURE 6, the folding iron 34 is composed of 35 tially enclosing an article pushed against a ?at sheet of
an upper plate 150‘ containing a transverse groove 36 and
wrapping material and through one open end of said cup,
a lower plate 152 containing a similar groove. Com
means closing the wrapping material across the open side
municating ‘with grooves 36 in each plate are longitudi
of the article, means for closing all but one pair of end
nally extending grooves 154 which terminate short of the
40 ?aps of wrapping material while pushing the article into
ends 156 of each plate.
Consequently, as the stack is
a heating iron, and means for sealing said one pair of
pushed out of the iron, the side portions of the triangular
?aps except for the tip ends thereof in said heating iron.
?ap are pushed down and heat sealed against the package,
6. A heating and wrapper ?ap sealing iron for a wrap
while the apex or tip 14h of the triangular tab rides free
ping machine comprising upper and lower plates separated
through grooves 154 and is only momentarily pressed
downward when passing under the end portions of the 45 a distance equal to the thickness of the article to be
wrapped, transverse grooves extending entirely across
iron. The contact with the iron is only su?icient to press
the facing surfaces of said plates for receiving unfolded
the tip 14h downward ?atly against the top of the package,
?aps on said article, and longitudinal grooves of less
without heating it sufficiently to seal it. This thus leaves
depth than said transverse grooves in said facing surfaces
an unsealed ?nger pull tip on the package.
The wrapping machine of this invention is a'very sim 50 and extending from said transverse grooves to adjacent
the ends of said plates for leaving an unsealed ?nger ‘pull
ple construction and is rapid and e?icient in operation.
The plungers 12, 26, 40 and 102 are operated in syn
tip on the end of each ?ap as the pair of ?aps are closed
chronism by conventional driving means and to which the
and sealed when said article is pushed longitudinally
conveyor belt 20 is also synchronized. A conventional
through said ?ap sealing iron.
wrapping machine for stacks of crackers or cookies has 55
a maximum output of about sixty packages a minute, as
References Cited in the ?le of this patent
a higher speed would produce such forces as to cause
UNITED STATES PATENTS
excessive breakage of the fragile goods. The machine
of this invention easily has an output of one hundred
762,255
Rose ________________ __ June 7, 1904
wrapped packages a minute without any breakage at all. 60
1,064,964
Dooley ______________ .._June 17,1913
Having now described the means by which the objects
of this invention are obtained, we claim:
1,203,592
Escobales ____________ __ Nov. 7, 1916
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