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Патент USA US3064736

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Nov. 20, 1962
L. M. HARTMANN ETAL
MACHINE FOR MAKING PULP BLANKS
Filed Sept. 30, 1959
3,064,727
I.
3,864,???
Patented Nov. 2c, 1952
2
3,€364,727
MACHINE FOR MAKING PULP BLANKS
Louis Martin Hartmann and Albert Bertram Arkadius
>
the shown embodiment being equal to the number of the
moulds on the carrier 19. The placing of the moulds
20 on the carrier 18 and the means by which they can be
moved in relation to same during operation, are mainly
Hansen, Lyngby, Denmark, assignors to Aktieselskabet
Brodrene Hartmann, Lynghy, Denmark, a ioint-stock
schematically suggested in the drawings.
company of Denmark
22 which is connected with the carrier 18 by means of a
link 24. One end of a link rod 26 is connected with the
mould 20 by means of a link 28, whereas the other end
Filed Sept. 30, 1959, Ser. No. 8%,584
Claims priority, application Denmark Get. 7, 1958
2 Claims. (Cl. 162-382)
This invention relates to a machine for making pulp
blanks, wherein the blanks are pneumatically transferred
Each mould 20 has a rearwardly extending projection
10 of the link rod 26 is connected with one arm 30 of an
angle lever mounted on the carrier 18 by means of a link
from one rotating carrier to moulds located on a second
32, the other arm 34 of said lever carrying a rotatable
roller 36, which travels in a track 38 in a stationary
rotating carrier, said moulds during transfer performing
cam 40.
ment on the disclosure of the applicants’ copending ap
plication Ser. No. 717,092, ?led February 24, 1958, now
carrier 10 but in the opposite direction.
To the carrier 19 is attached a gear wheel 42 which
a swinging movement controlled by a stationary cam, and 15
engages a gear wheel 44 on the carrier 18, whereby the
from the moulds are deposited on a travelling conveyor.
latter is rotated on its axis 46 at the same speed as the
The invention of this application constitutes an improve
Patent No. 2,986,211, granted May 30, 1961, and assigned
to the same assignee as that of the present application.
In the case of such a machine the depositing of the
blanks on the conveyor causes dii?culties as the blanks
By a suitable shaping of the cam track 38 a correct co~
operation can be obtained between the suction moulds 12
and the transfer moulds 20 when they travel through the
plane 48 which passes through the axes 14 and 46.
During such co-operation a brief compression of the
blanks formed by the suction on the moulds 12 is effected,
are usually in a moist and soft condition, and therefore
25 and said blanks are pneumatically transferred to the
may easily be deformed when hitting the conveyor.
moulds 2d, the blanks being held thereto by suction dur
It is an object of the invention to avoid these difficulties.
ing the continued movement of the moulds 2G.
According to the invention the cam is so shaped that
The part of the machine and its mode of operation
during the transfer of said blanks the moulds are swung
mentioned in the foregoing are known and therefore not
in relation to the second carrier in a direction opposite
30 described in detail.
to the direction of rotation of the said carrier.
The blanks received on the moulds 20 are deposited on
It will thereby be possible to adapt the path of travel
a conveyor which in the shown embodiment consists of
of the moulds immediately before, during, and imme
two endless chains 59 travelling over a guiding member
diately after the depositing, so that the depositing height
comprising two chain wheels 52. On pivots 54 carried
will be slight, and the depositing therefore can be effected
gently and leniently.
According to the invention it is furthermore expedient
35 equidistantly by the chains 50 are swingably suspended
plane shelves 56 which by gravity are always kept in
horizontal position by means of counter weights 58. The
that the cam be so shaped that the moulds during the
chain wheels 52 are so positioned that their axis 53
depositing of said blanks continue to occupy the same
is approximately vertically below the axis 46 of the car
direction in space, e.g. horizontal direction.
If the machine is used in combination with a known 40 rier 18. The conveyor which travels in the direction in
dicated by an arrow, serves to transfer the blanks to a
conveyor consisting of a row of shelves which are swing
drying kiln which as a whole is designated by the refer—
ably suspended from an endless conveyor member, the
once 59. When the blanks in dried condition leave the
latter travelling on a guiding member located below the
kiln 59 they are thrown off the shelves 56, so that these
second carrier, it is suitable according to the invention
that the place of depositing be so chosen that the shelf 4.5 shelves return, empty to the place of depositing.
At the place of depositing the cam track 33 has a
onto which the blank is delivered is located during the de
part 60 which in the direction of rotation extends obliquely
positing of the blank at the front part of the circumference
inwards towards the axis 46. When one of the rollers
of the guiding member at a short distance from the upper
36 travels on this part a swinging movement will be im
most point of said member. The axis of the guiding mem
ber is preferably disposed in proximity to a vertical plane 50 parted to the appurtenant mould 20 through the angle
lever 30, 34 and the link rod 26 in anti-clockwise direc
through the axis of the second carrier.
tion in relation to the carrier 18, i.e. in a direction op
By this design the best delivery is obtained when the
posite to that of the rotation of said carrier. By a suit
rate of advance of the conveyor is so adapted that the
able shaping of the cam track 38 an advantageous shape
component of the speed of a shelf in the travelling direc
tion at the place of depositing is approximately equal to 55 of the path for the absolute motion of the mould 20 can
the component of the speed of the depositing mould in the
same direction.
The invention will now be more fully described refer
thereby be obtained, and furthermore it will be possible
to keep the mould in horizontal or approximately hori
zontal position, viz. in parallel to the shelves 56, during
the time when the depositing of the blank of the ap
purtenant shelf 56 is effected, said shelf being itself in
ence being bad to the drawing. The single FIGURE,
which partly schematically shows an embodiment of the
horizontal position and moving during the depositing
essential parts of a machine according to the invention
along the front parts of and towards the uppermost points
for producing egg carriers or egg cartons from pulp.
of the chain wheels 52. Thus an approximation is ob
The machine comprises a trochoid carrier 10 for a plu
tained to the most favourable condition in which the path
rality of suction moulds 12 equidistantly and ?xedly lo
cated at its circumference. The carrier 10 is rotatably 65 of travel of the mould is parallel to that of the shelf, so
that the shortest possible distance between shelf and
mounted on an axis 14, and during the operation of the
mould can be used. Furthermore, the requirement can
machine it rotates continuously in the direction indicated
be met that the components in the direction of the con
by an arrow. Thereby the moulds 12 pass through a pulp
veyor of the speed of a shelf and of the speed of the
gruel 15 contained in a vat 16, pulp blanks being thus
70 mould above shall be approximately equal.
formed on the moulds by suction.
When the said conditions are ful?lled, the two ends of
From a second trochoid carrier 18 transfer moulds 20
the deposited blanks will strike the shelf simultaneously
are swingably suspended, the number of said moulds in
3,064,727
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4
toward the axis of the rotatable carrier to an extent such
and quite gently so that the blank is not subjected to
deformation and damage.
The invention is not restricted to the conveyor’s con
sisting of swingable shelves, and the invention may be
applied, whether or not the tWo carriers support equal
numbers of moulds. Furthermore, the part of the con
that the moulds are swung respectively to a horizontal‘
position over the shelves and that during the transfer of
the pulp blanks from the moulds to the shelves the moulds
are respectively kept parallel to and moved at the same
velocity and in the same direction as the shelves.
2. In an apparatus for the manufacture of pulp blanks
veyor, on which the blanks are removed from the place
from ?ber pulp, including a rotatable carrier rotatable
of depositing, need not extend perfectly horizontally.
about a horizontal axis and provided with spaced moulds
In the machine shown in the drawing the wet blanks are
transferred after a slight compression to the conveyor, 10 around its circumference for receiving and transferring
formed pulp blanks, a horizontally-arranged endless con
and practically all the drying is etfected by heat in the
veyor for receiving the pulp blanks from the moulds of
kiln. The invention may, however, also be used in con
said rotatable carrier, said endless conveyor having a re
nection with other machines wherein between the two car
ceiving end located with its upper ?ight adjacent the lower
riers shown there is provided one or more further car~
riers which may serve to a further compressing or other 15 portion of the carrier and including a series of swingable
shelves for respectively receiving the pulp blanks from
treatment of the blanks before they are delivered to the
the moulds of the rotatable carrier, means for keeping
conveyor.
'
said shelves in horizontal position during the operation
Having now fully described our invention we claim as
new and desire to secure by Letters Patent:
of the conveyor, and a rotatable guide member located at
the receiving end of the endless conveyor over which the
conveyor moves in proximity to the lower portion of
from ?ber pulp, including a rotatable carrier provided
the rotatable carrier and around which the shelves are
with spaced moulds around its circumference for receiving
carried in succession while being maintained horizontal, ‘
and transferring formed pulp blanks, a horizontally-ar
the improvement in which the moulds are swingably
ranged endless conveyor for receiving the pulp blanks
from the moulds of said rotatable carrier, said endless 25 mounted on the periphery of the rotatable carrier for
movement to di?erent angular positions relative to said
conveyor having a receiving end located adjacent the
periphery, a stationary cam controlling the swinging
lower portion of the rotatable carrier and including swing
movement of said moulds relative to the periphery of the
able shelves for respectively receiving the pulp blanks
rotatable carrier and having a contour in the area adjacent
from the moulds of the rotatable carrier, means for keep
ing said shelves in horizontal position during the opera 30 the receiving end of the endless conveyor effective for
swinging said moulds in succession to a horizontal posi
tion of the conveyor, and a guide member located at the
tion over the shelves of the endless conveyor for keeping
receiving end of the endless conveyor over which the
the moulds parallel to and moving at the same velocity
endless conveyor moves in proximity to the lower portion
and in the same direction as the shelves during the
of the rotatable carrier and around which the shelves are
1. In an apparatus for the manufacture of pulp blanks
carried while being maintained horizontal, the improve
35
ment in which the receiving end of the endless conveyor
and the lower portion of the rotatable carrier are located
adjacent to each other in positions such that the moulds
transfer the pulp blanks respectively to the shelves of the
conveyor as they move upwardly and forwardly in suc 40
cession around the upper portion of the guide member,
said moulds on the rotatable carrier being swingably ar
ranged, a stationary cam controlling the swinging move
ment of said moulds relative to the carrier and having a
bend in the area adjacent the receiving end of the’endless
Conveyor including a portion extending obliquely inwardly
time of transfer of the pulp blanks, whereby the pulp
blanks are gently deposited on said shelves from said
moulds while said moulds are parallel to and moving at
the same velocity and in the same direction as said
shelves.
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References Cited in the ?le of this patent
UNITED STATES PATENTS
1,211,229
2,881,679
2,986,211
Pruyn ________________ __ Jan. 2, 1917
Cox _________________ __ Apr. 14, 1959
Hartmann et al. ___-_,______ May 30, 1961
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