вход по аккаунту


код для вставки
Nov. 5, 1946.
Filed Nov. 8, 1945
4 Sheets-Sheet l
»Si@_ _
Nov. 5, 1946.
Filed Nov. 8, 1945
4 Sheets-Sheet 2
N0V~ 5, 1946.
Filed Nov. 8, 1945
4 sheets-sheet 4
Patented Nov. 5, 1946
Burton A. Hannewald, Joseph J. Lee, and James
M. Wheatley, Indianapolis, Ind.,- assignors to
Bemis Bro. Bag Company, St. Louis, Mo., a
corporation of Missouri
Application NovemberS, 1945, Serial No. 627,402
10 claims. (Cl. 223-39)
2 .
This invention relates to bag turners, and
with regard to certain more specific features, to
so-called stick turners, particularly for turning`
banded-label bags such as shown'in the United
States patent applications of Charles V. Brady
and August F. Ottinger, Serial Nos. 535,004, 578,
976 and 646,577, Viiled May 10, 1944, February
2l, 1945 and February 9, 1946, respectively.
sticks are then spread apart by pairs and addi
tional reciprocating sticks are then driven against
the bottoms of the bags to push these through
the mouths so as to turn the bags inside out. By
inside out is meant that bags which are manu
factured with` their rough seams outsideA are
turned so as to place these rough seams inside.
In general, two reciprocating turning sticks are
used located quite close to the bag edges. These
Among the several objects of the invention
may be noted the provision of a stick type of 10 drive the bag bottoms through their mouths.
The purpose of this is to produce a flat turned
Ibag turner which will turn banded-label bags
bag. This former scheme is satisfactory for
without tearing the labels; the provision of a
bags which bear no inside labels or the like prior
turner of the class described which may be oper
to turning. Such bags in general have the labels
ated at the same speed as former turners operat
applied after turning.
ing on non-labeled bags; and theprovision of ap
paratus of the class described which may readily `
„ According to said two applications above men
be adapted to bag turning apparatus now in use.
Other objects will‘be in part obvious andin part
pointed out hereinafter.
tioned by number, and as further indicated herein,
some bags are now made with a girthwise labeling
band or the like applied to the fabric before the
When the bag is sewn this band or
label is on the inside. When such bags are ap
, plied to the old turners, the turning sticks oper
ating quite close to the bag edges tend to buckle
the bag fabric at these points, and consequently
described, and the scope of the application of
which will be indicated in the following claims.
25 also the labels. The buckling is quite sharp,
particularly at the bag edges. Since the stated
In the accompanying drawings, in which one
labels have portions at the bag edges, they also
of various possible embodiments of the invention
are turned quite sharply and there is some tend
is illustrated,
ency to tear, crack or break these so that they
b Figui is a side elevation showing substantially
an' entire bag turning apparatus to which the in 30 'become disñgured in their iinal outside positions.
`Thepresent invention overcomes this diñiculty in
vention is applied;
respect to this class of labeled bags.
Fig. 2 is a plan view of Fig. 1;
Referring now more particularly to Fig. 1, there
Fig. 3 is an enlarged detail plan View of sig
is shown at numeral I- a frame on whichare
nificant portions ci Fig. 2 shown in a retracted
35 guide rails 3 for a reciprocating carriage 5. In
the frame I is a rotary crankshaft v'I carrying
Fig. 4 is a view similar to Fig. 3 showing the
a crank 9 (counterweightedv at I0) which through
parts in an advanced position;
a connecting rod Il oscillates a lever I3 pivoted
Fig. 5 is a fragmentary detail showing certain
at I5 in the frame I. Shaft 1 is driven from a
turning` sticks feeding a bag into take-oli means;
Fig. 6 is a diagrammatic view of parts set ac 40 power shaft 8 through a gear train 4I, 39. The
lever _I3 carries a grooved sector I'I, the outer `
cording to Fig. 3 but illustrating preliminary
Ycircular'face of which is centered at I5. Looped
operations on a bag;
over a forward edge I9 vof the sector Il and fas
Fig. 7 is a front elevation of Fig. 6;
tened at ZI is a cable 23 which passes tangen
Fig. 8 is a View similar to Fig. 6 but showing
45 tially off to the rear from the sector and is at
an advanced position of parts;
tachedvat 25 to the rear end of the carriage 5.
Fig. 9 is a front elevation of Fig. 8;
Likewise, there is looped over a rear portion 21
Fig. 10 is a view similar to Fig. 'K8 but showing
of the sector I'I and fastened at 29 a cable l-II>
a still further advanced position of parts; and,
Vwhich passes tangentially from the sector for
Fig. 11 is a front elevation of Fig. 10.>
The invention accordingly comprises the ele
"ments and combinations of elements, features of
construction, and arrangements of parts which
vwill be exemplified in the structures hereinafter
¿Similar reference characters indicate corre
sponding parts throughout the several views of
the drawings.
VSo-'called stick types of turning machines have
been used for bag turning. In these a bag mouth
20 bag is formed.
wardly to a fastening 33 at thefront'end of the
carriage 5. Thus upon rotation of the crank 9
and oscillation of the lever I3, along with >the
oscillation of the sector Il, the carriage 5 may be
reciprocated on the guide rails 3. The> stroke
is applied overv several sticks, usually four. These 65 vmay beadjusted by adjusting theposition of the
pin joint between the connecting rod II and the
lever I3 in one of several holes such as shown
at 35, thus accommodating the stroke to various
lengths of bags.
On the said shaft 8 is also a gear 43 which
l’ tions of the slides ss in the guide slots 85.
heads -I9 ‘being rigidly connected with the slides
83 will cause properly timed rocking actions of
the turning sticks 'I3' in the horizontal plane about
the pivots '|I.
drives apinion-45. The latter-drives gears 41 and
49 for driving a set of draw rolls 48 and 50 receiv
ing between them turned bags.
III and ||3. The iront portion of the stick is
round in bearing |i| and square in bearing ||3,
In front of the rolls 48 and 59 are mounted
At numeral I 69 is shown a central turning
stick» which is slidable longitudinally in bearings
rolls 52 and 54, respectively. Belts 56 overY the 10 thus preventing it from turning indiscriminately
respective pairs of rolls 50, 54 and 48, 52 move
in the direction shown in Fig. 11.» to receive turned
on its axis. Pivoted at ||5 on the stick |09 is an
oscillating block ||'| which ñts in the forked end
bags and eject them from the machine. A suit
|fI-.9.of_a bell crank I2 i. This bell crank is pivoted
able belt shifter mechanism may be used for the
f at |23 to an- extension part |25 of the carriage 5.
belts 56 to adjust them laterally on the rolls to 15 One` leg of the bell crank carries a roll follower
accommodate them to various bag widths, but
since this shifter forms no part of the present in
vention, it is not shown nor further described'.
On the shaft 'I is a cam 58 which bears against
|27 which operates in a groove |29 of a second
track |31, also attached to the frame |. This
track |31' has an oiiset |33 (Figs. 3 and 4) which
upon reciprocation of the carriage 5 provides
swinging movement Aof the bell crank |2I with
Ha.»,follower roll 50, the latter being carried upon
4.alever 62 pivoted at 64. Pinned at 66 at the
respect to the carriage. This movement is of an
Qe'ndofi the lever 62 is a connecting rod 53'. At the
oscillating character’ and atf a predetermined
Íótherend the rod 53" is pivoted at 6| to rocking
point in the travel of the carriage 5 causes rela.
_lever 55. Pivoted at 68 on the lever 55v is a rod
tive axial advance or retraction of the stick |09
‘I’U’which at its outer end' slides throughv an eye
with respect to the carriage.
4T2- on the frame I. A spring 'I4 vreacting from
Operation> is as follows:
Íthe‘frame and against a collar' 'I6 carried on the
Rotation of the shaft l turns the crank 9
Írb'd -I0H serves to bias the driving linkage for the
which through connecting rod || oscillates the
lever 55 so that the follower 60¥is held against
rocker I5 and the sector |'|'. Thus the carriage
Íthelcarn 5B.
30 5 is reciprocated by the ñexible connections 23
. " Lever 55 is carried on a rock shaft 5l on which
and 3|. The cam 58 drives the follower 60 which,
also. are held’ two lower spreaders 59. On ñxed
through the lever 62 and' rod 53, oscillates the
shaft V80, above the spreadei‘sï 59 are two upper,
lever 55. This oscillates the lower set of spread
non-rocking spreaders 63. By a'known suitable
Vers 59. The upper spreaders63 remain ñXed.
,meananot shown, the members of the respective 35 Also, through the gear train 43, 4‘I and 49 is
pairs Ío'f`sprea'ders 59` and 63 may be adjusted' to
eiîected turning of the rolls 59, 48 and movement
various llateral ydistances forr accommodation to
of the belts 55. Adjacent belt reaches move from
.various bag widths.H The shafts 51and 80 are
the apron 94 toward'theV outlet of the machine.
carried upon a support A82. " Aä platen 8‘4 extends
n Assuming that the carriage 5 is retracted to the
„from this support toward vthe rolls l52 and' 54. A 40 right as far as possible (see Fig. 3), the lower
able |355 is positioned above the frame I`behind
spreaders59` become raised so that they are close
lthe Asupport 82. ` ~
to the spreaders S3. The operator slides the open
_ ¿The parts above> described are old and further
mouth of a bagover the spreaders 63 and 59, the
_description will be`unn`ecessary. The improve
body' portion of the bag resting on table |35.
ments herein described have toV do particularly 45 This is done at the time that the carriage 5 is
¿with „attachnients- lon the carriage 5. Rêfëi'
now moreparticularly to Figs. 3-11, the car
riageSfha's rigidly Amounte'don ~it` a crossbar 65
whi .
Ih is Ía T-slot 6l. Along it are index marks
'tai' *m the att `e1 are 'adjustable' 'r-tet‘dça 'Studs
'I`| which may be loosened and tightened artÍ any
_desiredposition?along the slot S'I‘. l‘'I‘hesefloolts
«'lÈlÍferm rivets ,for latéral. 'SiSÍeeiegflïmßîeeSlëïßks
-'i3. _,_Thesne sticks swing-inlY a horizontal plane.
nacnsuckiáhas/ attached to it a b1`ock’1'5whijch
has apivoted 4connectionli with ahead V‘|91v Each
head_,"|9 is'icarriedwonfthe end_s oi" apair oilr‘igid
Y10a-rsV .8l . extending from a 511016,83- Eeçh ,Slide has
laV suitable extension in a guide Slot 35. at the re
spective end of, a’seçîond cross >guide4 87A of. the
@arriesga ïîivoiedßoneeßñees. 89 .Serve t@ G011
.riveted at Y95: to the, Carriage, 5f. Ari .extension
arcieri, frein the rocker .93 Provides . meses-.ier
k0,sci1,1aiï1ins the ro<=ker-1~Tliis lexteesìoneimßl et
,its 4outer VendVV carries- ajroltfollower 99 A»which
about to advance to the left.
As the carriage 5 begins to move forward, the
spreaders 59 are caused to be withdrawn from
the spreaders 53 so as to hold the mouth of the
bag' open and taut, providing an opening through
which the body of the bag may be pushed to turn
itinside out. '
As the carriage advancesthe turning sticks 'I3
are together as shown in Fig. 3 with the end |39
of stick |09 in advanced position of ends |31 on
the vsticks 13. A. substantial lead of stick |09
relative to sticks 'I3 is maintained during the
early part of the travel.
The conditions are diagrammed in Figs. 6v to
V1l. As-the carriage 5Y advances the ball end |39
of the central turning stick. |09 enters the cen
ter of one side of the bag and starts turning the
bag inside ont from its center (Figs. 6 and '7).
AS turning proceeds (Figs. 8 and 9) the sticks 'I3
65 follow in, at ñrst without spreading. The lead
of stick |09 is maintained.
As the action con
tinues the bag turns inside out at the center so
that most of the inside label band |4| has been
.theirame Y|arcor@v wl» .as indicated@
.has an _offset |95 which.-wheathesarfieee
risreciprócaec serves montane aimeriez»
ti ely tothe carries@ 5- Thus; Wheriïtheßerrieee
turned by a pull onA the fabric from. the center,
as caused by the central stick |09., By first push
ing the bag through its mouth by acentral’push
as described, the label -band |4| >is. bent withI the
leastbuckling. It should be noted that äthis band
cillated and cause' opposite 1reciprocatin'g mo
fis.generally -made of paperA attached by means
of paste to the insideof Vthe bag, which is vmade
of fabric. Therefore this gentle initial central
turning action is doubly important.
complete the turning in such a way as to present
the turned bags flatwise into the belts 56 for de
' After most or all of the label has been turned
livery from the machine in desirable iiat turned
by the central stick |99, the follower 99 reaches
vthe offset |05 in groove IUI. This causes a clock
wise rotation of the rocker 93 with a spreading of
the slides 83 in the guides 85. This causes
spreading of the pivots 11 and angling out of the
lateral turning sticks 13. Thus these sticks
take over the turning action after the danger to
the label strip has passed. Turning is then com
Another advantage of the invention is that it
is easily applicable to present-day horizontal-ta
ble turners such as outlined, since all that is re
quired is the addition of the track |-3| and the
following equipment on the cariage 15, such as the
bell crank |12| and the central sliding turning stick
In view of the above, it -will be seen that the
several objects of the invention are achieved and
other advantageous results attained.
ing turned. At the time that the turning action
As many changes could be made in the above
is taken over by the sticks 13, the follower |21 15
constructions without departing from the scope
reaches the offset |33 in groove |29, which causes
of the invention, it is intended that all matter
the bell crank |2| to rotate clockwise relative to
contained in the above description or shown in
the carriage 5. This causes retraction of the cen
the accompanying drawings shall be interpreted
tral stick |99 with respect to the carriage. Thus
pleted by the sticks 13 (see Figs. 5, 10 and 1l),
which in spreading also flatten out the bag be
the central stick |99 loses ground with respect to ~
forward movement of the sticks 13 and the turn
as illustrative and not in a limiting sense.
We claim:
l, An improvement in a bag turner having a
reciprocating carriage which reciprocates a pair
ends |31 of these sticks feed the bottom end of
of oppositely located turning sticks; comprising a
Athe bag between the belts 53, which frictionally
grasp the bag and feed it out of the machine 25 third turning stick loacted between said pair of
sticks, bearing means on the carriage for sup
from the platen 34. It will be noted that recipro
porting the third stick movably with .respect to
cation of the turning sticks 13 and |99 is -just
the carriage and parallel to its line of reciproca
above said platen 84.
tion, and means for moving said third stick rela
It may be noted that the timing is such that
as the bag reaches the end of the turning opera 30 tive to the carriage first so that its end is in ad
vance of the ends of said pair of sticks and there
tion with its turned bottom near the belts 56, the
after retracting with respect to the ends of said
lower spreaders 59 ibegin to rise so as to loosen the
pair of sticks.
grip of all of the spreaders 59 and "93 on the bag
2. An improvement in a bag turner having a
mouth. Hence continued forward motion of the
longitudinally reciprocating carriage which moves
sticks 13 serves to strip the turned mouth of the
a pair of oppositely located turning sticks, the
bag from the ends of the spreaders 59 and 63.
latter operating edgewise on bags; comprising a
The ends of these spreaders are rounded so that
third turning stick located centrally with respect
this stripping action occurs Without damage to
to said pair of sticks, bearing means on the car
the bag, The stripping action continues as the
turned bottoms of the bags are fed in between the 40 riage for supporting the third stick movably with
respect to the carriage and parallel to its line of
belts 56. Thus the bags are flattened throughout
reciprocation, and means for moving said third
their lengths.
stick longitudinally relative to the carriage first
It will be understood that it is not desirable to
so that its end is in advance of the ends of said
continue the turning operation at the center by
means of the ball |39 in advance of the ends |31 Y pair of sticks as the carriage starts a forward
movement, and as the carriage nears the end of
after the label has been satisfactorily either par
its forward movement retracting said third stick
tially or completely turned. This is because the
'with respect to the ends of said pair of sticks
ball |39 might tend to punch a hole in the bottom
until the end of the third stick is near or behind
of the bag if the timing of the action of spread
ers 59 were not perfect. Therefore it is desirable 50 a line joining the ends of said pair of sticks.
3. An improvement in a bag turner having a
during the final part of the turning operation as
reciprocating carriage which moves a pair of op
described to have the ball head |39 fall back rel
positely located turning sticks, the latter enter
atively to the ends |31 until the ball is at least
ing bags and spreading to operate edgewise on
not substantially in advance of said ends |31. In
bags; comprising a third turning stick located in
other words, the ball |39 in the final stages of
a plane substantially central with respect to the
turning may be about between the ends |31 or be
plane of spreading of said pair of sticks, bearing
hind them.
means on the carriage for supporting the third
After the carriage 5 has reached the left-hand
stick movably with respect to the carriage and
end of its trovel, the sector |1 oscillates back and
retracts it. This causes a reverse order of the 60 parallel to its line of reciprocation, and means
yfor moving said third stick longitudinally rela
events above described and the withdrawal of
tive to the carriage so that its end is in advance
the sticks into position under the table I5. At
of the ends of said pair of sticks as the carriage
the time that the carriage 5 has retracted to the
starts a forward movement, and as the carriage
right its maximum distance, the operator applies
another -bag to the spreaders 59 and 63, which at 65 nears the ends of its forward movement and said
pair of sticks spread retracting said third stick '
this time have gone back to their non-spreading
with respect to the spread ends of said pair of
positions close to one another.
sticks until the end of the third stick is near or
Advantages of the invention include the broad
behind a line joining the ends of said pair of
one stated, which is a starting of the turning ac
tion of the bag by means of a centrally applied 70 spread sticks.
4. In a bag turner having a reciprocating car
turning stick which causes the easiest possible
riage adapted to advance and retract and having
bending action on the materials of the inside pa
a pair of lateral and longitudinal turning sticks
per or like attached label. Then as the func
on the carriage; comprising a central longitudinal
tions of this central stick have been accomplished,
the advancing, separating sticks 13 take over and 75 turning stick movable longitudinally with the car
ing is completed by the spread sticks 13. The
riage and relatively thereto, means responsive to
pivoted to the carriage and cooperating with said
the movement of the carriage 'for ñrst maintain
central stick to move it in respect tothe car
Ving the end of the central stick in advance 'of the
riage, a follower carried by said rocker, and a
ends of the lateral sticks during an initialpart
cam track stationary with respect to the car
of the carriage advance, vsaid means being Aadapt Ul riagey and engaged by said follower, said track
ed relatively to retract the end of said >central
being shaped to move the rocker in response to
stick with respect to the lateral sticks during fur
carriage movement to move the rocker with re
ther advance movement of the carriage.
spect to the carriage, said track being shaped so
5. In a bag turner having a reciprocating car
riage adapted to advance and retract and hav-ing
a pair of lateral and longitudinal turning sticks on
the carriage, said sticks spreading upon advance
of the carriage; comprising a central longitudinal
turning stock movable longitudinally with. the
carriage and relatively thereto, means responsive
to the movement of the carriage for iirst main
taining the end of the centralïstick in advance of
the ends of the lateral sticks during an initial
part of the carriage advance and before said
sticks spread, said means being adapted relatively
to retract the endof said central stick with re
spect to the lateral sticks during further advance
that upon initial advance of the carriage and
before spreading of said pair of sticks the end of
the central turning stick is located ahead of the
ends of said pair of turning sticks and during
further carriage advance said central turning
stick is retracted to a position not substantially
in advance of the then spread ends of said pair
of sticks.
9. An attachment for a bag turner having a
reciprocating carriage adapted to advance `and
retract, said carriage having pivoted thereon lat
eral turning sticks mounted to move with the
carriage and to angle their` ends away fro-m one
another during carriage advance; comprising a
movement of the carriage and as said pair of
central longitudinal turning stick mounted on
the .carriage to move therewith and relatively
6. In vbag turning apparatus having a recipro v25 thereto, a rocker pivoted to the carriage and
eating carriage adapted to be advanced and re
cooperating with the lcentral turning stick to move
tracted, and said carriage having longitudinal
the saine relatively to the carriage, a 4follower
and laterally located turning sticks, the ends of
carried by the rocker, a stationary cam track
which yare adapted to be spread during the ñnal
ñxed with respect to the carriage and cooperat
period of the carriage advance; comprising a 30 ing with said follower, said cam track being
sticks spread.
central longitudinal turning stick longitudinally
>movable on the carriage, means responsive to
movement of the carriage for maintaining the end
of said centralr stick ahead of the ends of said
shaped so that upon initial advance of the car
riage the end of the central turning- stick moves
with the .carriage in advance of the ends of said
lateral turning sticks before said last-named ends
lateral sticks during initial advance movement of
separate, said cam track during the ñnal advance
the carriage, said means during said spreading
.movement of the carriage when the ends of the
movement of the ends of the lateral sticks caus
lateral sticks separate causing the advance end
ing said end of the central stick to be retracted
of .said central turning stick to Abe retracted to
«at least to Ya point approximately between the
a position substantially between said lateral turn
ends of said lateral sticks.
40 ing vsticks in their advance in the separated con
7. An attachment for bag turning apparatus
ditions of their ends.
Ahaving a reciprocating carriage adapted to ad
10. An attachment for a two-stick bag turner
vance and retract, said can'iage having lateral
.having a reciprocating carriage upon which said
turning sticks advancing and` retracting there
>sticks are mounted for advance and retraction of
with; comprising a central longitudinal stick lon 11; the ends »of the sticks; comprising a central stick
gitudinally movable on and with respect to the
mounted on the Ycarriage for movement therewith
carriage, a. rocking means pivoted to the car
>and longitudinally relatively thereto, a bell crank
riage and cooperating with said central stick to
.pivoted to the carriage, one arm of the bell crank
move it in respect ¿to the carriage, a follower car
having a forked connection with said central stick
ried by said rocker, and a cam. track stationary
for moving the stick longitudinally with Yrespect
with respect to the carriage and `engaged by said
to the carriage, said bell crank having a sec
follower, said tra-ck being shaped `to cause move
ond arm, a follower on said second arm, a sta
ment of the rocker vin response to carriage move
tionary cam track adjacent to the .path of mo
ment, said track being shaped Vso that îuponinitial
tion of .the carriage and .cooperating with said
advance of the carriage the end ofthe central
follower., said cam track having a straight por
turning stick is located ahead of the ends of the
tion> therein arranged to control said follower to
lateral turning sticks and during ñnai carriage
hold the bell crank in a position wherein during
advance said central turning stick ‘m retracted to
initial advance movement ofthe carriage the end
a .position not substantially in ’advance of .the
of said central turning stick protrudes .beyond the
said ‘ends of the `lateral sticks.
60 lends >of said lateral sticks, 'said vtrack having an
8. An attachment for bag turning apparatus
oiîset located so that at a .predetermined time
having a, reciprocating carriage adapted to ad
in the advance “movement of the carriage said
vance and retract, -said .carriage having a pair
end of `the Ícentral stick is retracted to .a position
»of lateral turning ‘sticks advancing and retract
.more nearly adjacent to the ends .of .said lateral
ing therewith and having yends which spread >as 65 sticks as the Ycarriage finishes its advance.
the advance progresses; comprising :a ’central '1on
`«gituclinal stick longitudinally movable on >and
with respect to the carriage, a rocking means
Без категории
Размер файла
936 Кб
Пожаловаться на содержимое документа