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Патент USA US2137656

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Nov. 22, 1938.
A, G.’ ROSE
2,137,656
WRAPPING MACHINE
Filed Sept‘, 7, 1937
» 265
2 Sheets-Sheet 1
15
A
wMI/I/G/
177087711024
VWWM/
£22213,
Nov. 22, 1938.
A. G. ROSE
'
Y
‘ 2,137,656‘
WRAPPING MACHINE
Filed Sept. 7,. 1937
129.2. -
2 Sheets-Sheet 2
Patented Nov. 22, 1938
2,137,656
UNITED STATES '
PATENT OFFI€E
2,137,656
WRAPPING MACHINE
Alfred German Rose, Gainsborough, England, as
signor to Rose Brothers (Gainsborough) Lim
ited, Gainsborough, England, a British com
Dally
Application September 7, 1937, Serial No. 162,808
In Great Britain September 14, 1936
8 Claims.
This invention relates to wrapping machines
of the type comprising a rotatable pocket-wheel
provided with a plurality of receiving pockets
and movable intermittently to carry each pocket
5 in turn up to a succession of stations at which
the various operations involved in enclosing an
article in a wrapper are effected.
Usually in this type of machine when any one
of the wheel pockets is brought temporarily to
10 one of the stations, hereinafter referred to as
the feed station, an article and wrapper are
pushed into the pocket and by this movement
the sides of the pocket fold the wrapper on to
three sides of the article. Two ?at portions of the
" wrapper extend outwardly from the pocket and a
2
(01. 93—7)
jaws to an extent determined by the setting of
the cam.
The machine may include striker mechanism
operable on the toggle linkages associated with
the wheel pockets periodically to open the grip
per jaws, said mechanism being actuated by
means (for example push rods, the effective
lengths of which may be varied) which are ad
justable to vary the timing of‘ the strikers to
compensate for any variation effected in the
minimum separation between the jaws of the
pockets.
An example of the invention, as applied to a
wrapping machine adapted for wrapping sweet
meats, will now be described with reference to 15
portion of the wrapper projects sideways beyond
the accompanying drawings, in which:
each end of the article. Folding means serve to
fold the two ?at portions of the wrapper one after
the other on to the outer and hitherto uncovered
side of the article. After each pocket with the
article and wrapper held therein has been carried
from the feed station, means is provided at a
succeeding station to fold or grip and twist the
Figures 1 and 2 are elevations at right-angles
to each other showing those portions of the ma
chine in which the invention is embodied.
sizes of which vary within given limits and also
The drawings are to some extent diagrammatic
and in each certain parts have been omitted for
the sake of clearness.
The machine illustrated is of known type com
prising a rotatable pocket wheel ll} mounted for
intermittent rotational movement about a hori~ 25
zontal axis l I. The pocket-Wheel is provided with
peripheral receiving pockets l2 each of which is
constituted by a pair of relatively movable jaws
l3, M. In the present example there are four
pockets arranged at equally spaced angular in 30
tervals, and the pocket-wheel is so driven (by
articles of a very fragile or delicate nature such
as chocolates or sweetmeats having soft centres.
According to this invention a wrapping ma
35 chine of the type referred to is characterized
by the provision of a single control means com
mon to the several pockets of the pocket-wheel
known mechanism, not illustrated) as to move
through one quarter of a revolution at each step.
The sweetmeats to be Wrapped are fed, for ex~
ample by hand, into recesses [5 arranged in a 35
circumferential series around a circular hori
zontal plate [6 which is rotatable about a ver
and operable at will to vary, simultaneously in
all the pockets, the receiving capacity of each.
40
In one construction according to the invention
each of the wheel pockets comprises a pair of
relatively movable gripper jaws interconnected
by a toggle linkage, and the aforesaid single con
the rotation of the pocket-wheel in such manner
as to bring each of the recesses E5 in succession 40
into a position beneath the pocket wheel and
portions of the wrapper extending sideways be
25 yond the ends of the article and ?nally the com
pletely wrapped article is ejected from its pocket.
An object of the present invention is to pro
vide an improved wrapping machine of the type
referred to, which is adapted to Wrap articles
30 such as sweetmeats or the like, the shapes and
trol means comprises a cam which is angularly
tical axis step by step in timed sequence with
in register with the pocket temporarily arrested
at the feed station 1. e. vertically below the axis
of the pocket-wheel. The mechanism for feed
adjustable with respect to the pocket-wheel about
ing the sweetmeats one at a time from the plate 45
the axis of rotation of the latter and which is ar
ranged to operate simultaneously on the toggle
linkages associated with the several pockets to
l6 into the pocket-wheel is of known type and
comprises a vertically reciprocatable pusher ll
which operates, in timed sequence with the pock
effect an adjustment in the minimum separa
tion between the jaws of each pocket. The ma
chine may include spring means bearing on the
et-wheel, to lift each sweetmeat Hi from the re
cess IS in the feed plate I6 and force it into one 50
of the wheel pockets.‘
toggle linkage and tending to move the pocket
The wrappers are constituted by successive
jaws towards one another, and a follower on the
portions in the length of a continuous strip 69
linkage engaging the angularly adjustable cam
to limit the degree of approach of the pocket
traversed intermittently past the feed station
between the pocket Wheel and the feed plate i6. 55
2
2,137,656
Cutter mechanism 20 operates, in timed sequence
with the pocket-wheel, to sever the leading por
tion of the wrapper strip 19 at about the same
instant as the sweetmeat IS in its upward travel
meets the paper. A transfer ?nger 2| is ar
ranged to engage the upper surface of the wrap
per over the sweetmeat so that during upward
travel of the pusher, the sweetmeat and its wrap
per are gripped between the transfer ?nger and
the upper end of the pusher. During further up
ward movement of the pusher the sweetmeat
and its wrapper are carried through a stationary
guide ‘22 and into the wheel pocket, during which
movement the wrapper is folded about two sides
During step by step rotational
15 of the sweetmeat.
movement of the pocket-wheel the remaining
folding operations, comprising the folding of the
wrapper onto the exposed front side of the sweet
meat, and the closing of the end portions of the
20 wrapper by twisting or folding, are carried out
in known manner and the completely wrapped
sweetmeat is ?nally ejected from the pocket
wheel at an ejection station 23, at which each
pocket is arrested immediately before it proceeds
25 to the feed station.
The jaws i3, M, constituting each pocket are
carried on the outer ends of two arms 24, 25
which are pivotally mounted at their inner ends
on the pocket-wheel. . Each jaw is on a screw
The normal opening and closing movements of
the pocket jaws during the operation of the ma—
chine are effected by striking mechanism ar
ranged in the following manner. When a pocket
arrives at the feed station, a striker 46 carried
on a lever 4i pivotally mounted at 42 is operated
'to engage the outer end of the sliding block 28
associated with the downwardly directed pocket
and to push this block inwardly, thus opening
the pocket jaws in readiness to receive the sweet 10
meat and its wrapper which at this stage are
under the control of the ascending pusher fl
and the transfer ?nger 2|. The striker (it is
then actuated to disengage the sliding block and
permit the jaws to approach and grip the sweet 15
meat, and preferably this action is so timed that
the disengagement of the sliding block takes place
slightly before the pusher has reached its upper
most position.
In this way there is obtained a
stroking action of the jaws upon the wrapper 20
tending to pull the latter tightly over the top
and around two opposite sides of the sweetmeat.
At the ejection station 23 the pocket jaWs are
opened to release the article by a second striker
43 which is operated to engage the sliding block 25
29 appropriate to the pocket at the ejection sta
tion and to move this block inwardly to open the
pocket jaws. Since a variation in the minimum
separation between the pocket jaws, by angular
_
setting of each jaw in relation to its supporting
arm may be adjusted, and after adjustment,
locked in position. The arms 26, 25 appropriate
adjustment of the control plate 32 will change 30
the position of the associated sliding blocks 29 in
relation to the strikers 40, 43, it is necessary,
after each adjustment as aforesaid, to retime the
to each pocket are interconnected by a single
strikers.
30 threaded stem 2% by means of which the initial
For this purpose the strikers are oper
35 toggle linkage 2T, 28, the pivotal connection be
ated, by push rods 44, 45 the effective lengths of 35
tween the links carrying a block 2?.‘ which is slid
able in a radial guide slot 39 in the pocket-wheel.
A coiled compression spring 3i is located between
the inner end of the sliding block 29 and the
40 inner end of the guide slot 35 and tends to force
the sliding block outwardly and thus to draw the
two jaws of the pocket towards one another
which are adjustable to enable the necessary al
teration in timing to be effected. The push rods
are coupled to rocking levers 45, 15'! which in turn
are coupled to eccentric straps 48, 49 driven in
40
timed sequence with the pocket-wheel.
By means of the pocket-wheel construction
according to this invention any size of article
within a given range may be dealt with and the
necessary adjustment of the pockets is simulta
neously effected by means of the controlling plate
to an extent which may be determined by pre
senting an article to one of the pockets when the
latter is in the closed position.
through the intermediary of the toggle linkage.
The extent to which the jaws may be forced to
45 wards one another under the action of the spring
Si is controlled in the following way. An ad
justing plate 32 with a peripheral ?ange 33 is
mounted on the pocket-wheel coaxially with it.
The inner surface of the peripheral flange 33 is
50 formed as a controlling cam surface.
55
60
65
70
Each of
the sliding blocks 2% associated with the respec
tive pockets of the wheel is formed with a pro
jection 3L3 arranged to engage the inner surface
of the ?ange 33, thereby limiting outward move
ment of the block under the action of the spring.
The inner surface of the peripheral ?ange com
rises four operative cam surfaces 35 extending
circumferentially of the control plate, one cam
surface for each pocket. As shown in Figure 1
each of the cam surfaces 35 varies progressively
in its distance from the axis of rotation of the
pocket-wheel, so that by rotational adjustment
of the control plate 32 the minimum separation
between the jaws of each of the pockets is simul~
taneously adjustable to any required extent with
in a given range. The control plate 32 is adapt
ed to be locked to the pocket-wheel by means
of bolts 36. While the machine is operating, the
control plate 32 rotates solid with the pocket
wheel; when adjustment in the minimum sepa
ration between the jaws of the pockets is to be
made the bolts 36 are slackened, the control plate
is moved angularly to the desired extent, and is
then again clamped in its re-adjusted position to
75 the pocket-Wheel.
I claim:-—
1. In a wrapping machine of the type described, 50
the combination of a rotatable pocket-wheel
having a plurality of article-receiving pockets
each of which comprises a pair of relatively mov~
able gripper jaws, and a single control means
common to the several pockets and operable at
will to vary, simultaneously in all the pockets the
minimum separation between the elements of
each pair of jaws.
2. A wrapping machine of the type described
comprising a rotatable pocket-wheel having a 60
plurality of pockets each of which comprises a
pair of relatively movable gripper jaws, a toggle
linkage for each pocket interconnecting the jaws
thereof, and a single control means common to
the several pockets and operable on the toggle
linkages associated therewith simultaneously to
vary the minimum separation between the ele
ments of each pair of pocket jaws.
3. A wrapping machine of the type described
comprising a rotatable pocket-wheel having a 70
plurality of pockets each of which comprises a
pair of relatively movable gripper jaws, a toggle
linkage for each pocket interconnecting the jaws
thereof, and a cam which is carried by the pocket
wheel and angularly adjustable in respect to it 75
2,137,656
about the wheel axis and which is arranged to
operate simultaneously on the toggle linkages as
sociated with the several pockets to vary the
minimum separation between the elements of
each pair of pocket jaws.
4. A wrapping machine of the type described
comprising a rotatable pocket-wheel having a
plurality of pockets each of which comprises a
pair of relatively movable gripper jaws, a toggle
10 linkage for each pocket interconnecting the jaws
thereof, spring means bearing on each toggle
linkage and tending to move the pocket jaws
towards one another, a cam which is carried by
the pocket-wheel and is angularly adjustable with
15 respect to it and which provides a plurality of
cam surfaces one for each pocket, and a cam fol
lower on each toggle linkage engaging the corre
sponding cam surface on the angularly adjustable
cam to limit the degree of approach of the pocket
20 jaws to an extent determined by the setting of
3 v
6. A wrapping machine as claimed in claim 2
combined with striker mechanism operable on
the toggle linkages associated with the wheel
pockets to open the gripper jaws for receiving an
article to be wrapped and for releasing the article
after wrapping has been completed. '
7. A wrapping machine as claimed in. claim 2
combined with striker mechanism operable on the
toggle linkages associated with the wheel pockets
periodically to open the gripper jaws, and actuat 10
ing means for the striker mechanism which is ad
justable to vary the timing of the strikers to
compensate for any variation effected in the
minimum separation between the jaws of the
pockets.
.
15
8. A wrapping machine of the type described
comprising a rotatable pocket-wheel having a
5. In a wrapping machine of the type described,
the combination of a pocket-wheel having a plu
plurality of pockets each of which is formed by
two pivotally mounted grippers movable towards
and away from one another, a toggle linkage for 20
each pocket interconnecting the two grippers, a
slide-block carried at the pivotal connection be
tween the toggle links of each linkage and slid
rality of article-receiving pockets each constituted
able in a radial guide slot in the pocket-Wheel, a
25 by relatively movable jaws, spring means tend
ing to effect movement of the jaws of each pocket
towards one another, and control means for ad
end of each radial slot and the inner end of the
the cam.
justably limiting the degree of approach of the
pocket jaws comprising an annular cam mounted
30 on the pocket-wheel and angularly adjustable
with respect thereto about the wheel axis, said
cam being divided circumierentially into a plu
rality of cam surfaces corresponding in number to
the pockets of the wheel, the several cam sur
35 faces being of the same contour, and each vary-,
ing from point to point along its circumferential
path progressively in distance from the axis of
- the pocket-wheel, and for each pocket a cam fol
lower engaging the appropriate cam surface and
control spring in compression between the inner 25
corresponding slide-block tending to force the
latter radially outwards to draw the pocket jaws
together, a cam plate angularly adjustable with
respect to the pocket-wheel and providing a plu 30
rality of cam surfaces one for each pocket, a cam
follower associated with each of the sliding blocks
aforesaid and engaging the cam surface appro
priate to the corresponding pocket to limit the
outward movement of the block under the action 35
of its control spring, and striker mechanism oper
able on the outer ends of the sliding blocks to
effect the opening movements of the pocket jaws
during the operation of the machine.
40 so interconnected with the corresponding pocket
jaws as to limit the degree of approach of the
latter to an extent determined by the angular
setting of the cam.
40
ALFRED GERMAN ROSE.
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