Machine for producing bodies of conical receptacles

A machine for winding conical bodies of receptacles in a helical manner around a conical, rotating shaping member using webs of waste paper is disclosed.

BACKGROUND OF THE INVENTION 
In the manufacture of e.g. cardboard and paste board, the board web is 
wound into a roll from which are cut off rolls of the width of web ordered 
by the customers. One consequence is waste material in the form of board 
rolls of different lengths. Hitherto, this waste material has not found 
any practical application except as waste paper which is shredded to be 
re-used in the paper manufacture. 
The purpose of the subject invention is primarily to provide a practical 
application for such waste material by using it to produce the conical 
bodies of receptacles. For this purpose, the waste material is cut into 
webs of a width of e.g. 40-60 millimeters which webs are wound in 
overlapping relationship, one winding turn partly overlapping the previous 
one, and glued together to form the conical bodies of receptacles of 
various kinds and intended for various purposes. At their smaller end the 
receptacles are formed with an inner shoulder on which a bottom piece may 
be supported. Also at their larger ends, the receptacles are preferably 
formed with an inner shoulder on which a lid may be supported. This is the 
case when the receptacles are used to hold e.g. granular or particulate 
materials. 
The subject invention concerns a machine for producing the conical bodies 
of receptacles of this kind, using preferably waste material of the nature 
referred to above. The machine comprises a rotatably driven shaping member 
having a conical jacket face, a frame supporting a web of material in the 
form of a narrow strip wound into a roll, which web is intended to be used 
to form the conical receptacle bodies by being wound about the shaping 
member, a device adapted to removably secure the starting end of the 
material web to the smaller end of the shaping member, and a device to 
effect axial displacement of the shaping member relatively to the support 
frame during the rotation of the shaping member for the purpose of winding 
the web of material in helical winding turns around the conical jacket 
face of the shaping member while ensuring that the winding turns only 
partly overlap and adhere to each other with the aid of an adhesive. 
SUMMARY OF THE INVENTION 
It is characteristic of the invention that at its smaller end the shaping 
member is provided with a cylindrical portion the diameter of which is 
slightly smaller than the smallest diameter of the conical jacket face of 
the shaping member, that a guide lid is arranged to be moved towards the 
smaller end of the shaping member so as to cover said end for the purpose 
of guiding the web of material while the latter is being wound onto the 
shaping member, that a pair of jaws are arranged at the smaller end of the 
shaping member, one of the jaws being stationary while the other one is 
arranged for displacement towards and away from the stationary jaw, to 
clamp the starting end of the web of material to the shaping member, and 
that a slit is provided in the cylindrical portion of the smaller end of 
the shaping member, which slit is open towards the smaller end of the 
shaping member so as to allow reception therein of the starting end of the 
web which is introduced into the slit by means of a feeder arm to be 
clamped between the jaws.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT 
The elongate frame 1 of the machine supports a sliding member 4 which is 
arranged for displacement in the lengthwise direction of the frame by 
means of a piston-and-cylinder unit 2, 3. At one end of the sliding member 
4 is rotatably mounted a hollow cylinder 5 which is formed with a conical 
jacket face 6 and serves as a winding-turn shaping member. The hollow 
cylinder 5 is attached at its larger end 7 to a bearing shaft 8 and is 
driven by a motor 10 via V-belts 9. The larger end of the hollow cylinder 
5 is provided with a guide flange 11 and its smaller end 12 with a flange 
13 of cylindrical configuration, the outer diameter of which is smaller 
than the smallest diameter of the conical jacket face 6. A lid 17 is 
arranged to be lowered into position in front of the flange 13 by means of 
a piston-and-cylinder unit 14, 15, said lid 17 formed with a flange 16 
serving to guide the material web. At its centre, the lid 17 also supports 
a piston-and-cylinder unit 18, 19 the function of which will be explained 
in the following. 
Internally of the flange 13 at the smaller end 12 of the winding-turn 
shaping member 5, which smaller end is provided with a bottom piece 20 is 
provided a stationary jaw 21 which together with a movable jaw 22 serves 
to clamp the starting end 23 of the strip-like web of material 24. The 
movable jaw 22 is arranged on the free end of an arm 25 the opposite end 
of which is mounted for pivotal movement about a bolt 26 arranged on said 
bottom piece 20. A steel spring 27 is arranged to urge the arm 25 into 
position against the stationary jaw 21. Two levers 28, 29 (FIG. 9) 
interconnected in a knee-joint fashion connect the arm 25 with a bracket 
30 on the bottom piece 20 so as to ensure that when the articulation point 
(fulcrum) 31 interconnecting the levers 28 and 29 is forced downwards by 
the piston 18 against the action of a steel spring 32 to the position 
illustrated in FIG. 9 in dash-and-dot lines, the arm 25 together with the 
associated jaw 22 is turned away from the stationary jaw 21. In this 
inoperative position (FIG. 3) the arm 25 is caught by a locking pawl 33 
one end of which is pivotally mounted for turning movement about a bolt 34 
supported in a bracket 35 at the bottom piece 20 and its opposite end 37 
is pivoted by a steel spring 36 to the locking position indicated in 
continuous lines in FIG. 10. Opposite the gap between the jaws 21, 22 the 
cylindrical flange 13 is formed with a slit 39 through which the starting 
end 23 of the web may be introduced laterally (i.e. from the right as seen 
in FIG. 1). 
At one side of the machine frame 1 is provided a feeder arm 40 serving to 
pull the starting end 23 of the web 24 of material to a position opposite 
the slit 39. The upper end of the feeder arm 40 is mounted for pivotal 
movement on a horizontal shaft 38. The pivotal movement of the arm 40 is 
effected by means of a piston-and-cylinder unit 41, 42 and a lever 43 
mounted on the shaft 38. The feeder arm 40 comprises one arm section 44 
which is integral with the shaft 38 and one arm section 46 which by means 
of a shaft 45 is articulated to the lower end of the first arm section 44. 
A piston-and-cylinder unit 47, 48 pivots the arm section 46 about the 
shaft 45. At its lower end the arm section 46 supports the stationary 
blade 49 of a pair of scissors and as well as the other scissor blade 53 
which is movable relative to the stationary blade about a shaft 52 with 
the aid of a piston-and-cylinder unit 50, 51. The movable scissor blade 53 
supports a movable clamping jaw 55 which is biased by a spring 54 and 
which cooperates with a stationary jaw 56 supported by the stationary 
scissor blade 49. 
On the opposite side of the frame 1, at the lower end of an angular lever 
arm 57 is rotatably mounted a press roller 58 which exerts a pressing 
action on the outher face 6 of the jacket of the shaping member 5 upon 
pivotal movement of the angular lever arm, effected by a 
piston-and-cylinder unit 59, 60. 
At the side of the frame 1 where the feeder arm 40 is mounted is also 
arranged a support stand 61 holding a material supply roll 62 from which 
the web 24 of material is unreeled. A tensioning device 63 maintains the 
web 24 under adequate tension while it is being wound onto the shaping 
member 5. A glue pot 65 is supported by a bracket arm 64 and a 
glue-application roller 66 dips into the pot 65 and applies glue to the 
lower face of the web 24 of material. 
The auxiliary motor 67 indicated in FIG. 1 is arranged to turn the shaping 
member 5 via V-belts 68 over a part of a revolution until a stop member 69 
formed on the machine shaft 8 abuts against a retaining pawl 72 in a 
position wherein the slit 39 formed in the flange 13 is in an initial 
position, accessible to the free end of the feeder arm 40. A 
piston-and-cylinder unit 70, 71 is arranged to disengage the retaining 
pawl 72. 
For easier understanding of the mode of operation of the machine, reference 
is initially made to FIGS. 12 and 13 which show the manner in which the 
various turns of the web of material are positioned one overlapping the 
other to form the conical body 74 of the finished receptacle 73 so that 
the various turns form an annular shoulder 75 to support the bottom 76 of 
the receptacle and another annular shoulder 77 to support the lid 78 of 
the receptacle (when used). 
The board web 24 is introduced between the blades 49, 53 of the scissors 
and the web is cut off transversely by the scissors while at the same time 
the jaw 55 clamps the starting end of the web against the stationary jaw 
56. The arm 40 pulls the web 24 to the position illustrated in FIG. 3 in 
dash-and-dot lines, ensuring that the starting end 23 is exactly opposite 
the slot 39. The piston-and-cylinder unit 2, 3 displaces the slide member 
4 and together with the latter also the shaping member 5 over a small 
distance to the right as seen in FIG. 1, whereby the starting end 23 will 
be positioned inside the slit and in the space between the jaws 21 and 22. 
At the end of this short displacement of the shaping member 5 a set screw 
79 (FIG. 11) on the feeder arm 40 abuts against the locking pawl 33, 
whereby the arm 25 is released and, through the action of the spring 27, 
the jaw 22 clamps the starting end 23 against the jaw 21. The 
piston-and-cylinder unit 50, 51 opens the blade 53 of the scissors and 
consequently also the jaw 55. The piston-and-cylinder unit 47, 48 swings 
the arm section 46 laterally while at the same time returning the feeder 
arm 40 to its starting position, shown in continuous lines in FIG. 3. 
However, the arm section 46 remains in the starting position shown in FIG. 
2. The piston-and-cylinder unit 14, 15 moves the guide lid 17 down to the 
position in front of the flange 13, the piston-and-cylinder unit 70, 71 
moves the retaining pawl 72 to the disengaged position of the latter, 
shown in dash-and-dot lines in FIG. 5 and the motor 10 is started. At the 
moment when the shaping member 5 starts to rotate and the winding-on of 
the web of material about the member 5 is begun, the piston-and-cylinder 
unit 59, 60 swings the press roller 58 against the outer face of the 
cardboard web 24 to ensure that the various winding turns adhere to one 
another, glued together by the binding agent applied to one of the web 
faces. The initial winding turns 80 are guided by the flange 16 on the 
guide lid 17. These winding turns are applied in such a manner that they 
cover one another completely. The slide member 4 is thereafter displaced 
by the piston-and-cylinder unit 2, 3 while the rotation of the shaping 
member 5 to the right as seen in FIGS. 1 and 2 continues. The subsequent 
winding turns 81 will therefore overlap only partly. When the conical body 
73 has been given sufficient height, the axial displacement of the slide 
member 4 ceases and a number of winding turns 82 are applied covering one 
another completely, thus forming the flange 77. The slide member 4 is 
thereafter displaced over a further short distance to the right and a 
number of winding turns 83 are applied so as to cover one another 
completely to form the upper guide flange 84 serving to support the lid 
78. The arm section 46 is swung in the clockwise direction as seen in FIG. 
2, and the web 24 is cut off by the scissors 49, 53. The rotation of the 
shaping member 5 continues until the winding-on of the trailing end of the 
web has been completed. 
The piston-and-cylinder unit 18, 19 returns the jaw 22 to its inoperative 
position and through the action of the spring 36 the locking pawl 33 
catches the arm 25. The guide lid 17 is then moved back to its starting 
position (FIG. 1) by the piston-and-cylinder unit 14, 15. During the 
winding, the outer diameter of the guide flange 84 of the jacket face 74 
of the receptacle becomes larger than the inner diameter 85 of an annular 
flange 86, which is attached to the frame 1. The shaping member 5 is 
arranged to pass through this annular flange and the result is that when 
the sliding member 4 and consequently the shaping member 5 are moved back 
to their original positions (to the left as seen in FIG. 2) by the 
piston-and-cylinder unit 2, 3, the finished receptacle body 74 will be 
pushed axially away from the shaping member 5 upon abutment of the guide 
flange 84 against this annular flange 86. The completed receptacle thus 
will slide off the shaping member at the small end of the latter. 
When the slide member 4 together with the shaping member 5 have returned to 
their initial positions, the various operational steps of the machine will 
be repeated to produce another receptacle body 74. 
The machine as shown and described herein is to be regarded as an example 
only and the various parts and components of the machine may be altered in 
a variety of ways within the scope of the appended claims. The lines 
supplying pressurized medium to the various cylinders have been omitted 
from the drawings in order not to unnecessarily clutter the latter. 
Activation and deactivation of the valves in these lines as well as 
activation and deactivation of the coupling means incorporated in the 
machine may be controlled electrically and computerized to make the entire 
winding operation fully automated. The auxiliary motor 67 may be omitted, 
provided the machine is instead equipped with a coupling designed to 
control the operational phases of the machine shaft 8 effecting the 
turning of the shaping member 5 to the initial position thereof.