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Патент USA US3027706

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April 3, 1962
3,027,696
W. C. LEASURE
METHOD AND APPARATUS FOR PACKAGING
Filed Jan. 30, 1961
3 Sheets-Sheet 1
INVENTOR
WALL/HM c . LE?SUPE)
ATTORNEYS
April 3, 1962
w. c. LEASURE
3,027,696
METHOD AND APPARATUS FOR PACKAGING
Filed Jan. 30, 1961
3 Sheets-Sheet 2
INVENTOR
ATTORNEYS
April 3, 1962
w. c. LEASURE
3,027,696?
METHOD AND APPARATUS FOR PACKAGING
Filed Jan. 30, 1961
3 Sheets-Sheet 3
INVENTOR
WILL/17M c. maaké',
United States Patent
3,027,696
Patented Apr. 3, 1962
1
2
3,027,696
come more fully apparent hereinafter, according to the
present invention the packaging material is moving con
tinuously from the roll as the machine is cycling and this
is of obvious advantage in achieving a smooth operation.
An object of the present invention is to provide an
METHOD AND APPARATUS FOR PACKAGING
‘William C. Leasure, Houston, Tex., assignor to Mira-Pair,
Inc., Houston, Tex., a corporation of Texas
Filed Jan. 30, 1961, Ser. No. 85,830
8 Claims. (Cl. 53-28)
This invention relates to a method and apparatus for
packaging and more particularly to a method and appa
improved method and apparatus for packaging wherein
both the former and sealing jaws reciprocate parallel to
the longitudinal axis of the packaging material so that
the same rate of package formation may be achieved
ratus in which the former and sealing jaws reciprocate 10 while the parts are moving at one half the speed of simi
maintaining the packaging material in continuous move
lar prior art equipments.
ment from the roll and packages may be made at the
Another object of the present invention is to provide
same rate as prior art devices while moving the parts of
a packaging apparatus and method wherein the packaging
the mechanism at one half the speed of such prior art
material is moving continuously from the roll while the
devices. The present application is a continuation-in-part 15 apparatus is cycling.
of my prior application Serial No. 5,916, ?led February
Other objects and many of the attendant advantages of
1, 1960, now Patent No. 2,969,627.
the present invention will become more fully apparent
In one type of prior art packaging machinery such as
upon consideration of the following detailed speci?cation
shown in the Zwoyer Patent 1,986,422, issued January
in connection with the accompanying drawings wherein:
1, 1935, strip material is passed from a roll over a former 20
FIGS. 1 to 4 are diagrammatic drawings showing the
so as to be shaped into tubular form. A pair of sealing
sequence of operation of the apparatus in accordance with
and severing jaws are mounted so as to reciprocate into
the present invention,
and out of engagement with the ‘tubular formed packag
FIG. 5 is a front elevational view of one embodiment
ing material. In addition the sealing and severing jaws
of packaging equipment incorporating the present inven
are adapted to move in a direction parallel to the longi 25 tion, and
tudinal axis of the tubular formed strip material so that
FIG. 6 is a side elevational view thereof.
Referring now more speci?cally to the drawings where
move upwardly free of the packaging material and in
in like numerals indicate like parts throughout the several
wardly to grasp the material and form the top seal of
views there is shown at 1 in FIG. 1 a roll of packaging
one package and the bottom seal of an adjacent package. 30 material which may be of any suitable type and is gen
While the jaws are clamping the packaging material they
erally ?exible so that it may be shaped in the desired
are moved downwardly to pull the packaging material
package con?guration. The packaging material passes
over the former. At the ‘bottom of the stroke the sever
from the roll 1 under and over a series of rollers 2, 3, 4,
ing means separates a completed package and the jaws
5, and 6. The roller 4 is mounted so as to be slidable
release and are in position to start the next cycle. Appa 35 vertically in the frame and is provided with spring means
ratus of this type is also shown in my prior Patent 2,
to tension the packaging material any desired amount.
899,875.
The packaging material engages the former 7 after
There is disclosed in my prior application Serial No.
passing beneath roller 3 which is mounted on the former
the cycle of operation is as follows: The sealing jaws
5,916, ?led February 1, 1960, now U.S. Patent No. 2,
969,627, another type of packaging apparatus in which
the sealing jaws are adapted to move into and out of
engagement with the packaging material but the former
is movable in a direction parallel to the longitudinal axis
of the tubular formed strip material and reciprocates
support so that roller 8 will move with the former. The
former is mounted externally of the packaging material
and is adapted to shape the strip material into a sub“
stantially tubular form. This former may be of the
type shown in greater detail in my prior Patent 2,899,875,
issued August 18, 1959. While one particular type of for
with respect to the sealing jaws. The cycle of operation 45 mer is disclosed, it is to be understood that many types of
of this type ofpapparatus is as follows. Commencing
formers may be used and achieve the purposes of the
with the former in its lowermost position and the seal
present invention.
ing jaws engaged with the packaging material, the for
A pair of sealing jaws 9 and 10 are mounted beneath
mer is moved upwardly so as to draw the packaging ma~
terial over the former. The sealing jaws release the sev
ered lowermost package and the former then lowers to
the former 7 and these jaws may be of a type well known
in the prior art and shown for example in the patent to
Zwoyer, Patent No. 1,986,422, issued January 1, 1935.
pass the tubular formed packaging material between the
jaws. The sealing jaws close when the former has reached
ments so as to heat seal the packaging ?lm or, of course,
its lowermost position so as to form the top seal of one
bag and the bottom seal of the bag to be next formed.
such jaws could be provided with other types of sealing
means. In addition such jaws may incorporate severing
The advantages of a method and apparatus such as this
means so as to separate the individual packages
Such sealing jaws are generally provided with heating ele
are fully set forth in the prior application referred to
The sequence of operation of the present invention is as
above.
follows: With the parts as shown in FIG. 1 the former 7
The present invention combines many of the features of
is at the limit of its movement parallel to the longitudinal
both of the types of packaging equipment described above 60 axis of the tubular formed packaging material in a direc
and utilizes an apparatus having a moving former and
tion away from the sealing jaws and the sealing jaws 9
a pair of jaws reciprocably mounted to move into and
and 10 are at their limit of movement parallel to the
out of engagement with the packaging material which
longitudinal axis of the tubular formed packaging ma
jaws also reciprocate along the same axis as the former.
terial in a direction away from the former. The sealing
Since both the former and the sealing jaws are movable 65 jaws are shown as in engaged position and have com
along the longitudinal axis of the packaging material, each
pleted forming the top seal of package 1.1 and the bot
of these parts moves through one half the distance passed
tom seal of an adjacent package 12. The severing means
within the jaws operates so that when the jaws 9 and 10
move outwardly to the FIG. 2 position the package 11
is freed for removal.
After the jaws 9 and 11} move to the open position
as shown in FIG. 2 the jaws 9 and 16 move in a direc
through by the former or jaws alone of prior packaging
machines as described above and thus, ‘the parts can
move at one half the ‘speed of the devices referred to
above and yet produce packages at the same rate as such
prior art packaging equipments. In addition, as will be
3,027,696
3
4
tion towards the former along the longitudinal axis of
at only one half the rate of movement of prior art
the packaging material as shown in FIG. 3 and the former
7 moves in a direction towards the scaling jaws along the
packaging equipments as described hereinbefore in order
same axis.
prior art packaging machines. Furthermore, the pack
to achieve the same rate of package production as such
It can be seen that as the former 7 moves
aging material is in continuous motion during the cycle
of operation due to the fact that one half of the required
downwardly from ‘the upper limit of position thereof
packaging material is drawn from the roll 1 and is ad
vanced to a position between the rollers 6 and 8. A pair
package length is taken from the roll during the down
of snubbers 13 mounted on the former engage the packag
ward movement of the former and the other half of the
required package length is taken from the roll during the
ing material allowing the packaging material to advance
but preventing the packaging material from being pulled 10 downward movement of the sealing jaws. Actually at the
instant the former and sealing jaws reach the end points
off the former backwardly to a position between the roll
of their motion along the longitudinal axis of the packag
ens 6 and 8 as the former moves downwardly.
ing material, the roll of packaging material might stop
When the former and jaws have moved tothe end
instantaneously but for the presence of the tensioning roll
positions thereof most closely adjacent, the jaws 9 and
4 which acts to maintain the roll in continuous motion.
The use of such tensioning rollers is, of course, well
known in the art. Thus, the disadvantages of a starting
10 then move from the open position as shown in FIG.
3 to a closed position as shown in FIG. 4 wherein the
jaws form the top seal of package 12 and the bottom
seal of an adjacent package. The sealing jaws 9 and It)
and stopping type of motion of the packaging material
common to previously employed packaging equipments
then move to the original position shown in FIG. 1 and
the former 7 moves to its FIG. 1 position. It can be seen 20 are avoided.
The ?lling of the individual packages is achieved in
that as this motion occurs the movement of the jaws 9
the same manner‘ as set forth in my prior application
and 10 and movement of the former along the longitu
dinal axis of the tubular formed packaging material will
draw packaging material from the roll 1.
Serial No. 5,916. That is to say, ?lling of the package
with product commences with the “parts in the FIG. 4
In FIGS. 5 and 6 there is shown one embodiment of a
position, with the jaws engaged and the former in its
lowermost position. Filling may continue during the
upward movement of the former and the downward
packaging machine incorporating the combination of a
movable former and a movable pair of sealing jaws, both
elements being movable along the longitudinal axis of
the tubular shaped packaging material.
A base 20 has oppositely disposed vertically extending7
movement of the jaws until the parts have reached the
FIG. 1 position and may even continue after the jaws
have released as shown in the FIG. 2. position. It is, of
course, essential that the product be disposed within the
package when the parts have reached the FIG. 3 posi
frames 21 and 22 mounted thereon, these frames form
ing convenient housings for the drive means and electrical
connections for the operative parts of the packaging
equipments. The sealing jaws are shown at 23 and 24
tion at which time the jaws are to form the top seal of the
package.
(shown in dotted lines in FIG. 6) and these jaws are
It is evident that the ratio of former and sealing jaw
rcciprocatably mounted for movement into and out of
engagement with the packaging material within a frame
25. The speci?c means to reciprocate the jaws and to
longitudinal movement need not be 1 to l but may, in
fact, vary to suit any particular operational requirement.
provide sealing and severing means within the jaws forms
Obviously, many modi?cations and variations of the
present invention are possible in light of the above teach
no part of the present invention and may be any well
ings.
known prior art mechanism.
What is claimed as new and desired to be secured by
Letters Patent is:
The frame 25 is mounted to reciprocate in a direction
parallel to the longitudinal axis of the tubular formed
l. A method of packaging comprising the steps of
‘packaging material and for this purpose the frame is
passing ‘strip packaging material over a former to shape
provided with outwardly extending securing ?anges 25
the strip material into substantially tubular form, recip
and 27 which extend through vertically disposed slots in
rocating sealing jaws into and out of engagement with
the packaging material. reciprocating the ‘former and
frame members 21 and 2,2‘.
The former 28 is mounted on a base plate 29‘ which has
sealing jaws in a direction parallel to the longitudinal axis
of the packaging material, the former and sealing jaws
being brought towards each other while the sealing jaws
outwardly extending securing ?anges 3t} and 31 which
pass through slots in the frame members 21 and 22.
There is mounted on the base plate a motor 32 hav
ing a crank arm 34 ?xed to the output shaft thereof.
are out of engagement with the packaging material and
the former and sealing jaws being moved away from each
other while the sealing jaws are in engagement with the
Journalled on the crank arm is a connecting link 35
j which drives a sprocket 36 with a reciprocating motion
as the motor rotates crank arm 34». A chain 37 engages
packaging material.
‘sprocket 36 and passes over sprockets 33 and 39 and
the ends of the chain are connected with the ?ange 31
on the former support 29 and the ?ange 2.7 on the jaw
frame 25. A shaft 49 extending from motor 32 is jour
nalled in frames 21 and 22 and provides an identical 60
chain drive for the opposite sides of the former and jaw
frame.
7
It can be readily seen that the reciprocating sprocket
36 will drive the former 28 and jaw frame 25 together
to the position shown in FIG. 6 when rotating in one
direction, and will drive the former 2t; and jaw frame 25
apart to the FIG. 5 position when rotating in the opposite
direction.
It can thus be seen that according to the present inven
tion both the former and the sealing jaws move in a di
rection parallel to the longitudinal axis of the packaging
material.
half the distance
Both theof former
the jaws
andorjaws
former
movealone
through
of prior
packaging equipments. It can be readily appreciated
then that the former and sealing jaws will need to move
2. A method of packaging comprising the steps of
passing strip packaging material over a former to shape
the strip material into substantially tubular form,'recip
rocating sealing jaws into and out of engagement with the
packaging material, reciprocating the former and sealing
jaws in a direction parallel to the ‘longitudinal axis of the
packaging material, the sealing jaws and former moving
in opposing relation to draw strip material continuously
from a roll, the former and sealing jaws being brought
towards each other while the jaws are out of engagement
with the packaging material and the former and vsealing
jaws being moved away from each other While the seal- 7
ing jaws are in engagement with the packaging material. 7
3. A method of packaging with packaging apparatus
having a former and sealing jaws comprising the steps
70 of passing strip packaging material over a former to
shape the strip material into substantially tubular form,
moving the former towards the sealing jaws in a direc
tion parallel to thelongitudinal axis of the packaging
material’ for a distance. approximately one-half of the
length of the package to be formed and simultaneously
8,027,696
5
moving the sealing jaws towards the former in a direction
parallel to the longitudinal axis of the packaging material
for a distance approximately one-half the length of the
package to be formed, engaging the sealing jaws with the
packaging material, feeding product to the package being
formed moving the former away from the sealing jaws
in a direction parallel to the longitudinal axis of the
packaging material for a distance approximately one-half
the length of the package to be formed and simultane
ously moving the sealing jaws away from the former in
a direction parallel to the longitudinal axis of the pack
aging material for a distance approximately one-half
the length of the package to be formed, forming the top
seal of the package the bottom seal of the package hav
6
parallel to the longitudinal axis of the tubular formed
packaging material, and means for moving said sealing
jaws in a direction parallel to the longitudinal axis of the
tubular formed packaging material, the sealing jaws and
former moving in opposing relation to draw strip material
continuously from the roll.
6. Packaging apparatus comprising a former for shap
ing strip packaging material from a roll into tubular form,
a pair of sealing jaws, means for reciprocating said seal
10 ing jaws into and out of engagement with the packaging
material, means for moving the former in a direction
parallel to the longitudinal axis of the tubular formed
packaging material, and means for moving said sealing
jaws in a direction parallel to the longitudinal axis of the
ing been formed by the preceding cycle and simultane 15 tubular formed packaging material, the sealing jaws and
ously forming the bottom seal of the next succeeding
former moving in opposing relation to draw strip material
package, and severing the formed package and releasing
continuously from the roll, the former and sealing jaws
the sealing jaws.
being brought towards each other while the sealing jaws
4. A method of packaging with packaging apparatus
are out of engagement with the packaging material and
having a former and sealing jaws comprising the steps
the former ‘and sealing jaws being moved away from each
of passing strip packaging material from a roll over a
other while the sealing jaws are in engagement with the
packaging material.
former to shape the strip material into substantially tubu
7. Packaging apparatus comprising a frame, a former
lar form, moving the former towards the sealing jaws in
a direction parallel to the longitudinal axis of the pack
mounted in said frame for vertical reciprocating motion,
aging material for a distance approximately one-half the 25 means for reciprocating said former, a pair of sealing
jaws, a support mounting said sealing jaws for horizontal
length of the package to be formed so as to draw packag
reciprocatory motion, means for reciprocating said seal
ing material from the roll and simultaneously moving the
ing jaws within said support, said support being mounted
sealing jaws toward the former in a direction parallel to
within said frame for vertical reciprocatory motion and
the longitudinal axis of the packaging material for a dis
tance approximately one-half the length of the package 30 means for reciprocating said support whereby said former
and said sealing jaw support alternately move in adjacency
to be formed, engaging the sealing jaws with the packag
and in spaced apart relation.
ing material, moving the former away from the sealing
8. Packaging apparatus comprising a supporting frame,
jaws in a direction parallel to the longitudinal axis of
a former for shaping strip packaging material into tubu
the packaging material for a distance approximately one
half the length of the package to be formed and simul 35 lar form mounted in said frame for slidable movement
therein along the longitudinal axis of the tubular formed
taneously moving the sealing jaws away from the former
strip material, a pair of sealing jaws, means for moving
in a direction parallel to the longitudinal axis of the pack
said sealing jaws into and out of sealing relation, said
aging material for a distance approximately one-half the
sealing jaws and said moving means being mounted in
length of the package to be formed so as to draw packag
ing material from the roll, forming the top seal of the 40 said frame for slidable movement therein along the longi
tudinal axis of the tubular formed strip material, drive
package the bottom seal of the package having been
means interconnected with said former and said sealing
formed by the preceding cycle and simultaneously form
jaws for sequentially moving said former and sealing
ing the bottom seal of the next succeeding package, and
jaws in a direction towards each other and in a direction
severing the formed package and releasing the sealing
jaws, the packaging material being continuously drawn 45 away from each other, said sealing jaws being out of seal
ing relation when said former and sealing jaws are moved
in a direction towards each other, said sealing jaws being
5. Packaging apparatus comprising a former for shap
in sealing relation when said former and sealing jaws
ing strip packaging material from a roll into tubular form,
are moved in a direction away from each other.
a pair of sealing jaws, means for reciprocating said seal
ing jaws into and out of engagement with the packaging 50
No references cited.‘
material, means for moving the former in a direction
from the roll.
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