FR2498557A1 - MACHINE FOR PACKING SUBSTANTIALLY CYLINDRICALLY SHAPED OBJECTS IN SHEETS CUT ON CLOSED CONTOUR IN BANDS OF A FLEXIBLE PACKAGING MATERIAL - Google Patents

Abstract

1. Machine for packaging substantially cylindrically shaped objects in sheets each cut out along a closed, preferably circular contour, from a web (85) of a supple packaging materila, comprising a fixed packaging head (25) and a mobile packaging head (22) in the form of two rings of common axis, capable of gripping therebetween a packaging sheat when the mobile head (22) is brought against the fixed head (25), and of which the central openings (26, 27) are coaxial, at least one bush (29, 30) disposed the line the central opening (26) of the fixed packaging head (25) and connected to that face of the latter which is not turned towards the mobile packaging head (22), a mobile pusher (80) making it possible to push an object to be packaged and the sheet on which it has been disposed, inside the bush (29, 30) up to a bearing plate (52) perpendicular to the axis of the bush (29, 30), a diaphragm device (51) making it possible, by partial obturation of the bush (29, 30), to fold the packaging sheet down on one of the faces of the object resting on the bearing plate (52), a sealing member (82) being introduced into the bush (29, 30) and applied, through the diaphragm (51), on the part of the packaging sheet folded on the object which rests against the bearing plate (52), after withdrawal of the mobile pusher (80) from the bush (29, 30), characterized in that it also comprises, on the one hand, for gripping the web (85) of supple packaging material, a fixed plate (1) presenting a central opening (2) of which the shape corresponds to that of the contour of the sheets, and of which the section is slightly greater than that of the sheets to be cut out, as well as a mobile presser plate (5), parallel to the fixed plate (1) and presenting on its face opposite the latter a groove (14) having the form of the contour of the sheets and corning opposite the central opening (2) of the fixed plate (1) when the presser plate (5) is applied against the latter, the presser plate (5) also presenting a central opening (13) inside the groove (14) allowing the passage of the mobile packaging head (22) and, on the other hand, for cutting out a sheet from a web (85) pressed between the fixed plate (1) and the presser plate (5), a system (31, 39) mobile along the contour of the sheets about the fixed packaging head (25) projecting inside the central opening (2) of the fixed plate (1) and a cutting tool (46), borne by the mobile system (31, 39) and movable in a direction perpendicular to the fixed and presser plates (1 and 5) respectively, between a cut-out position, in which the tool (46) traverses the central opening (2) of the fixed plate (1) and is engaged in the groove (14) of the presser plate (5), and a rest position in which the tool (46) is at least disengaged from the groove (14) of the presser plate (5).

Description

The invention relates to machines for packing shaped objects

  substantially cylindrical, such as cheeses, ribbons wrapped with sticky paper or typewriter, deodorizing blocks for sanitary ware etc ..., and more particularly for machines packaging these objects in sheets cut according to contours

  closed, preferably convex, such as circular discs

  in strips of flexible packaging material,

  such as paper, aluminum and foils of

  plastic transparent or not and possibly

  heat-sealable, the packaging sheet being preferably

  be regularly folded around the circumference of the ob-

  jet. French Patent No. 73 13019 in the name of the Applicant discloses a machine for packaging such objects in flexible sheets cut in a closed contour, and comprising a fixed packaging head and a mobile packaging head, presenting in the form of two crowns of common axes, which can enclose a sheet of packing between them when they

  are brought against each other, and whose

  res-cenitrales are coaxial with at least one sleeve for the passage of objects to be packaged, disposed in the

  extension of the central opening of the packaging head

  age fixed and attached to the face of the latter which is not turned towards the mobile packaging head. In addition, a diaphragm device partially obturates the sleeve by folding the packaging sheet on one side.

  faces of an object after the object has been

  placed by its other face against the portion of the sheet closing the central openings of the packaging heads applied against each other, then pushed with this sheet in the sleeve by a movable pusher, until coming to rest against a plate perpendicular support

  to the axis of the socket. A sealing member is inserted

  in the sleeve and applied through the diaphragm to the portion of the wrapping sheet folded over the object resting against the backing plate, after the

  removing the mobile pusher from the socket.

  In this French patent, the heads of

  are provided on their faces, with radial complementary teeth, to initiate a pleating of a sheet which they enclose, so as to wrap the object in a pleated sheet at its periphery, the axis common to the packing heads and the socket being vertical, and

  the movable head being disposed above the fixed head.

  Packing machines of this type must be supplied on the one hand with articles to be packaged, on the other hand

  cut sheets, either manually or automatically

  for one and / or the other of these operations.

  Advantageously, however, to automatically cut and cut sheet metal of the packaging machine, a thin sheet cutting machine can be used in closed contours in strips of packaging material as described in the French patent. No. 4,705,555 in the name of the Applicant, and comprising, on the one hand, to enclose a strip of packing material, two trays, one of which is fixed and has a slot having the shape of the closed contour to be cut, and the other is movable and has a groove on the face opposite the first, this groove being superimposed on the slot in the closed contour, when the two plates are applied against each other, and on the other hand , for cutting

  of this sheet, a sharp tool carried by a team of

  page following the outline of the closed contour, and move

  çable in a direction perpendicular to the trays

  between a cutting position in which the tool

  the slot and is engaged in the groove, and a rest position 'in which the tool is not

engaged in the groove.

  When the closed contour, common to the slot and the groove is circular, the fixed plate consists of a central circular disk surrounded by a fixed plate and carried by a fixed shaft, serving as a pivot for the movement of the crew mobile and

  guide for the displacement perpendicular to the

cutting tool.

  To ensure the maintenance of a sheet cut on the fixed plate during the retreat of the movable plate, there are provided suction nozzles in the central disc, these nozzles being connected to a chamber

  of depression developed in this disc, and put into

  nication with a vacuum panpe. Then, the transfer of the cut sheet of the cutting machine on the packaging machine is ensured by the sliding, on at least one slide going from one to the other of these machines, a suction probe, carried by an arm

  tubular, and capable of moving between a posi-

  interior contour, in which he is engaged

  in a notch of the mobile platform and put in communica-

  with the source of depression while the link

  of the latter with the nozzles is cut off, and a posi-

  outside the contour, directly above the lower head

  pleating and packaging of the packaging machine.

  associate, on which the cut sheet is de-

  posed as soon as the connection with the source of depression

is cut off.

  Finally, to avoid snagging and

  of the strip in which the sheet was cut, by the latter during its transfer from one

  machine to the other, nozzles are also provided.

  on the fixed plate of the cutting machine, close to the slot around the slot, the operation of these nozzles to be synchronized with the advance not

  step of the tape of the packaging material on the

  fixed water of the cutting machine.

  It is clear that the maximum operating speed of an installation associating the two aforementioned machines is determined from the lowest of the maximum speeds of these two machines, and taking into account the significant duration of the transfer of a cut sheet from the cutting machine to the packaging machine, which is a significant limitation to the operation of such a plant, particularly for large diameter discs, which can cling to the belt feed mechanism

  packaging material on the fixed tray of the machine.

  China chopping. In addition, such an installation is

  cumbersome and delicate to regulate since the two

  associated countries must operate in synchronism.

  By the present invention it is proposed to overcome these various disadvantages, by means of a single machine, filling the two functions of cutting and packaging preferably with pleating, the machine according to the invention being more of a bulk limited, simplified structure and adjustment, and allowing increased rates due in particular to the removal of any transfer phase cut sheets from one station to another. This machine according to the invention also makes it possible to cut large-area sheets and to pack bulky objects while presenting a

simple structure.

  For this purpose the packaging machine according to the invention, of the type presented above, is characterized

  in that it also includes, on the one hand,

  squeezing the strips of flexible packaging material, a fixed tray, having a central opening whose shape corresponds to that of the contour of the leaves, and whose section is slightly greater than that of the sheets, and a movable pressure plate, arranged parallel to the fixed plate, and having, on its face opposite the fixed plate, a groove having the shape of the contour of the sheets and coming opposite the central opening 2-5 of the fixed plate, when the pressure plate is

  Ci. <- applied against the latter, the pressure plate presented

  as also a central opening, internal to the groove, allowing the passage of the movable packaging head, and, secondly, for the cutting of a sheet in a strip 1o pressed between the fixed and pressure plate, a crew mobile, following the outline of the leaves around the fixed head of the packing, disposed in the opening k '' ntralex fixed plateau, slightly back from the side of the latter opposite to that against which applies the

  pressure plate, and a sharp tool, carried by the equi-

  movable page, and movable in a direction perpendicular toplateaux fixed and pressing between a cutting position, in which the tool passes through the central opening of the fixed plate and is engaged in the groove of the pressure plate, and a rest position, in which tool

  is at least clear of the throat of the pressure plate. ad-

  tagously, and in a way known in itself, the throat is

  circular and the moving equipment includes a tour-

  nante, mounted in rotation around the socket and carrying

  a radial arm at the outer end of which is mounted the

it is sharp.

  In a preferred embodiment, whose structure is simple, the cutting tool is secured to a clevis pivotally mounted on the outer end of the radial arm, about a radial axis perpendicular to the axis of rotation of the ring. rotating, and a roller is rotatably mounted in the yoke around a second radial axis, perpendicular to the axis of rotation of the ring, to roll on a ring surrounding with play the rotating ring, and movable in translation according to the l axis of rotation of the ring, in order to control the position of

the cutting tool.

  1, I The axial position of the ring, which Cammande the position of the cutting tool, is also -emme by cylinders to which the ring is elastically recalled. In a preferred embodiment, and to facilitate the cutting of a sheet, the pressure plate has on its face facing the fixed plate, and between its groove and its central opening, a plurality of suction nozzles opening into at least one annular channel placed in communication with a source of depression, for

  flatten the part of the strip of flexible packaging material

  ge closing the central aperture of the fixed plate against the

pressure plate.

  Preferably, in a manner known per se, the band

  of flexible material is maintained and moved between the

  fixed water and the pressure plate by an advance device

  step by step, taking at least a pair of tongs,

  it can be moved on slides along the fixed plate by at least one fork, pivotally mounted about an axis transverse to the direction of movement of the strip on the fixed plate, and operated by a jack. In a preferred embodiment, the facing faces of the packaging heads are provided with complementary radial teeth to initiate a pleating of a sheet that they enclose, so as to package the object in a folded sheet at its periphery, the axis common to the packaging heads and the socket being vertical, the movable head being disposed above the fixed head, of

  even of the pressure plate is placed above the

fixed water.

  According to the invention, the mobile packaging head of the machine is suspended with lost stroke, on the rods of cylinders mounted on gantries integral with the mobile pressure plate, on either side of the packing head

  mobile, by means of diametrically opposed legs pre-

  the openings through which the stems of

  whose extracities carry drag stops

  legs, which are shaped as bent ears to connect to the face of the movable head

not turned towards the fixed head.

  According to another characteristic of the invention, the movable pressure plate is slidably mounted along columns connecting to the fixed plate fixed crosspieces carrying control cylinders of the displacement of the pressure plate towards the fixed plate, by their laces.

  provided at their free ends with spe-

  with the impression of the mobile pressure plate, which is resiliently biased towards the fixed crosspieces by reBorts bearing on the one hand against the fixed plate, and on the other hand against the bottom of sleeves carried by the lateral lugs of the pressure plate and traversed with

guidance by the columns.

  According to another characteristic of the invention, the support plate is mounted at the end

  rod of a jack and can be introduced by this

  deny in the socket, until its bearing surface

  at the central opening of the packing head

  fixed, then pushed back with the object by the movable push

  the, whose race is limited so that the object is

  inserted into the socket beyond the diaphragm

  me, the support plate being immobilized in this posi-

  by a blocking system the time of the operations of the diaphragm device and the sealing member, then moved to remove the packaged object from the socket and place it in the path of an ejection member

  bringing the object to an evacuation station.

  In a manner known per se, the push-button

  bile can be in the form of an annular piston moved by a jack eccentric to the axis of the heads

  of packing, the sealing member being axially displaceable

  the annular piston by an axial cylinder parallel to the eccentric cylinder. The sealing member can

  be a welding head, if the flexible packing material

  ge is a thermoplastic material, or a label holder, coming to cap the packaged object to deposit on the latter

  a self-adhesive label, in other cases.

  The present invention will be better understood, with the aid of a particular embodiment, which will be described below, without limitation, with reference to the appended drawings in which:

  FIG. 1 represents a perspective view

  an exploded and partially cut edge of a machine with

  baller, Figure 2 shows a sectional view

  in a plane parallel to the direction of movement

  1 of the machine according to FIG. 1, FIG. 3 represents a section along III-III of FIG.

  Figure 4 shows a sectional view of

according to IV-IV in Figure 2,

  and FIG. 5 shows a view in

  perspective of a sharp tool mounted at the end of an arm

  dial intended to be worn by the mobile crew of a

machine according to Figures 1 to 4.

  Referring to Figures 1 to 4, the machine comprises a fixed plate 1, horizontal and rectangular, pierced with a circular central opening 2, slightly larger section than the circular sheets or disks in which objects of substantially

  cyclindrical products, such as cheeses, must be packaged.

  This fixed plate 1 also has, along the

  part of its long sides, two grooves 3, and to each of its four corners, a mounting hole of a

  vertical guide column 4. As it seems clear

  4, a movable pressure plate 5

  placed horizontally above the fixed plate 1, is slidably mounted in the vertical direction by means of four

  side legs 6, integral with the four corners of the pla-

  pressure plate 5, and each mounted on a sleeve 7,

  crossed by one of the columns for securing the

  above the fixed plate 1 of two fixed crosspieces 8.

  Each sleeve 7 is received in a hole of the corresponding tab 6 and has at its lower end an outer radial flange 9 housed in a counterbore surrounding the piercing of the tab 6 on its underside. The bottom of each sleeve 7 has a guide bore on a column 4 and a spring 10, surrounding the column 4, bears against the fixed plate 1 and against the bottom of the sleeve 7 to lift the presser 5, above the fixed plate 1. Two pairs of vertical cylinders, fixed by their cylinder on the fixed crossbars 8, control the displacement of the pressure plate 5 towards the fixed plate 1, against the springs 10. The rods of the cylinders 11 carry, at their lower free end, spherical caps

  12 supported by corresponding shape imprints

  on the upper side of the

  5. The latter also has a circumstantial opening

  central eyelet 13, coaxial with the central opening 2

  fixed tray 1, but of lower section to it.

  In addition, a circular groove 14, corresponding to the path

  leaves to be cut, is provided in the underside

  the pressure plate 5, and opens out directly above the opening 2 of the fixed plate 1, as shown in FIG. 3. Finally, between the groove 14 and the opening 13, suction nozzles 16, communicating with a channel

  ring 17 machined in the pressure plate 5 and capable of

  tible to be put in communication with a

  this depression (not shown), open on the face

  lower the pressure plate 5. These nozzles 16 are made

  cut by fine holes in a metal sheet closing the canal

  ring on the underside of the tray 5.

  On the upper face of the pressure plate 5, and on both sides of its central opening 13, are

  bolted two transverse gantries 18, on each of-

  which is mounted the cylinder of a vertical jack 19, whose rod passes through a longitudinal sliding leg of a movable upper packing and pleating head 22, and carries at its lower end

  a stop 21 for lifting this head 22, when the

  19 are ordered in retraction.

  The wrapping and pleating head 22 is

  is in the form of a circular ring coaxial with the central opening] 3 of the pressure plate 5, and a

  outer diameter less than the diameter of the opening 13.

  The lower face of this head 22 has a shape

  slightly frustoconical and has a radial toothing

  23, the suspension lugs 20 are attached to the

  upper face of the movable head 22 by

  bent 24 so that the operation of the cylinders 19 per-

  move the movable head 22 through the opening

  re central 13 of the pressure plate 5, to bring it to

  cooperate with a lower packing and pleating head

stationary 25.

  The latter is also in the form of a coaxial circular ring at the central openings 2 and 13 of the fixed plates 1 and 5 and

  to the movable head 22. Its outer diameter is light-

  higher than that of opening 13 of the

  5, and its upper face, inclined towards its opening

  center 26, which is of the same diameter as the opening

  27 of the movable head 22 has a shape

  slightly frustoconical female, complementary to the

  frustoconical male of the underside of the head mo-

  bile 22, and a radial toothing 28. complementary

  with play of that 23 of the movable head 22.

  The fixed head 25 is disposed under the fixed plate 1, so that the periphery of its upper face is located in the opening 2. The lower face of

  the fixed head 25 is extended by a sleeve in two parts.

  29 and 30, coaxial with the openings, 2, 13, 26 and 27 respectively of the trays 1 and 5 and the heads 25 and 22, and of the same internal diameter as the openings 26 and 27, and which corresponds to a diameter slightly greater than

  that of cylindrical objects to be packaged.

  A ring 31 is rotated around

  the upper part 29 of the sleeve, thanks to a roller

  07 supported by a spacer 32 bearing on the edge of a central opening of a fixed upper horizontal deck 33 carried by four uprights 34 in line with a fixed lower horizontal deck 35. The ring 31 is driven by a belt 36 passing in the groove of a pulley 37 mounted on the axis of a motor 38, suspended

  under the apron 33. At its upper part, the ring

  Nante 31 carries a radial arm 39, shown in more detail

  in FIG. 5. This arm 39 is provided at its end with

  dull, with a curved foot 40, by which the arm 39 is

  on the upper face of the ring 31, and at its end

  external member, a support 41, on which a yoke 42 is pivotally mounted about a substantially radial axis 43 perpendicular to the axis of rotation of the ring 31. A roller 44 is rotatably mounted in the yoke 42 around a fixed axis 45 radial and also perpendicular to the axis of rotation of the ring 31, so that the roller 44 can roll on a flat ring 47, mounted with clearance around the

  ring 31, when the latter is rotated.

  A cutting blade 46 is secured to the

  outer portion of the yoke 42, and points upwards.

  The flat ring 47 rests by three imprints of its face

  lower on spherical caps 48 carried to the ex-

  upper free end of the rods of three cylinders 49 sus-

  hanged to the deck 33 by their cylinders and the flat ring 47 is returned to this deck 33 by three springs of

traction 50.

F '- -

AT; I

,! 1

  A diaphragm device 51 is located

  placed between the two parts 29 and '0 of the sleeve, and fixed under the apron 33. This diaphragm device, of the type called "iris" is known per se, and comprises a rotating disc provided with spiral portiors slots in each which engages a nipple secured to a rod

  moving radially and ending in a blade, the diffe-

  the lamellae interlocking in such a manner that in the open position of the diaphragm these blades are spread apart and completely free the axial passage of the

  socket, while in the closed position, the blades

  minent a limited axial passage. This device, well known, and whose rotating disc is moved by a jack, is not

not shown in detail.

  A circular support plate 52, with a section slightly smaller than that of the bushing, is carried at the free upper end of the rod of a linear long-stroke axial jack 53, the cylinder of which is suspended under the lower apron. Under the support plate 52 is suspended a counter-rod flats 54 parallel to the rod of the cylinder 53, and through a slot 55 formed in the apron 35 and in a stirrup

  56, carrying a locking cylinder 57 capable of immo-

  biliser in position the counter-rod 54, and therefore the plate

  52, by the exit of its rod applying a piston

  your brake 58 against a flat part of this counter-rod 54, itself clamped against a branch of the stirrup 56.

  maximum position rod output, the cylinder 53 raises the

  that of support 52 so that its upper surface is at the opening 26 of the packaging head and of

  fixed pleating 25, whereas in the maximum position

  the upper surface of this support plate 52 is brought to a level of a discharge slide 59, substantially connected to the plate 52 by a circular cutout. An ejection pushbutton 60, operated by an ejector cylinder 61, whose cylinder is clamped on a crossmember 62 between two uprights 34, allows the transfer on the evacuation slide 59 of any object worn.

  by the support plate 52 in its lower position.

  Two lateral forks 63, pivotally mounted

  aunts about a horizontal and transverse axis 64 by their lower ends, and each retained in a yoke 65 moved longitudinally by a jack 66 articulated on the lower apron 35, each surrounds letusdents a stud 67, projecting laterally)

  a clamp 68, whose body 69 is longitudinally sliding

  dinalement along two slides 70, whose lower jaw 71 is received in the corresponding groove 3 of the fixed plate 1, and whose upper jaw 72 carries a clamping cylinder 73 against the lower jaw 71. The pair of clamp 68 with the forks 63 and actuating cylinders 66 constitute a device for stepwise advance of a strip of packaging material introduced

  between the fixed plate 1 and the presser 5, and one of which

  useful for cutting a packing sheet

  The rod is unrolled by a transverse rocker 74, pivotally mounted by its lateral arms on fasteners secured to the upper deck 33, and operated by

  a jack (not shown) in synchronism with a device

  braking device of a winding drum 76 mounted on a

transverse axis.

  Above the packing and pleating head

  22, a bracket 78 supports two straight cylinders

  and parallel, one of which is eccentric and carries, at the free lower end of its rod, an annular piston-shaped pusher 80, capable of being lowered into the socket to a level slightly lower than the diaphragm 51, and the other 81 is axial and carries at the free lower end of its stem a

  sealing member 82 which can pass through the annular piston

  80, and which is a soldering iron, whether the packaging material is heat-sealable, or a label holder 1

F F.

-P: - _ ,,

  CI of known type, in the opposite case> which debits the

  labels one by one. The rods of cylinders 79 and 81

  pour their cylinder from one side to the other, and two dice 83 are keyed at their upper end. These dice 83 are each provided with a rectangular notch which embraces one side of a rectangular vertical guide bar 84, fixed between the cylinder heads of the cylinders 79 and 81, so that their rods can not

  not turn around their respective axes.

  The machine whose structure has just been de-

  Written, operates as follows: the strip 85 of flexible packaging material is unwound from the drum X by passing on a guide roller 77, by the operation of the latch 74, which releases the brake drum 75 while the clamps 68 hold the band 85 on the board

  1. After a round trip movement, the

  the 74 has run a length sufficient for cutting

  of a leaf, and this length is driven and now

  by the step feed device between the raised pressure plate 5 and the fixed plate 1, while the brake drum 76 is tightened. The pressure plate 5 is then lowered by the jacks il against the band 85 that clamps on the fixed plate 1, while the movable head 22 remains

* The suction nozzles 16 flatten against the

  pressing member 5 a portion of the strip 85 covering the opening 2 fixed duplicator 1, so as to be soft

the band 85.

  The cutting blade 46, driven in rotation with the rotating ring 31 around the fixed head 25, is

  then lifted by the lifting of the flat ring 47 com-

  cylinder 49, which causes the blade 46 to

  pour the opening 2 of the fixed plate 1, and engage in the groove 14 of the pressure plate 5, by cutting without

  burr in the band 85 a circular packing sheet.

  Then the cylinders 49 and the springs 50 recall the flat ring 47 downwards, which brings back the cutting blade 46

  in the rest position, clear of the groove 14.

  The packing and folding head 22

  is then lowered by the cylinders 19 on the fixed head 25.

  Thanks to its lost stroke suspension, the movable head 22, at the end of the race, rests only by its weight on the fixed head 25 by pinching the sheet on it, without tearing or crumpling. The cooperating teeth 23 and 28 of the packaging and pleating heads 22 and 25 thus initiate the pleating of the periphery of the sheet, while the central part of this sheet closes the opening.

  26 of the fixed head 25, and is supported by the

  that support 52 raised in the high position.

  An object to be packaged, such as a cheese, is

  then arranged, preferably by an automatic device

  tick, for example of the well-known type with suction cup, on the

  central part of the sheet, resting on the plate 52.

  The cylinder 79 then controls the descent of the annular piston.

  80, which is applied against the upper face of the object, then drives it with the sheet that the object covers its underside in the sleeve by pushing the support plate 52, the cylinder 53 being then fed at low pressure. In this movement, the periphery of the sheet slides between the teeth

  heads 22 and 25, then along the lateral surface

  inside of the socket. When the annular piston 80 has made its entire stroke, the upper face of the object is positioned slightly below the diaphragm 51, and the locking cylinder 57 controls the immobilization of the support plate 52 in the corresponding position. The maximum stroke of the annular piston 80 being defined,

  it is the thickness of the object that determines the posi-

  tion in which the support plate 52 is locked. The annular piston 80 is then removed from the socket, and the diaphragm 31 is closed by folding the periphery of the

  sheet that protrudes above the object on the superficial

  of the latter, accentuating the pleating of this sheet already initiated by the cooperating teeth of the heads 22 and 25. The diameter of the axial passage defined by the diaphragm 51 closed is comparable to that of the

  annular piston 80, so that the des-ente of the gold-

  The sealing member, caulmandé by the cylinder 31, allows to close the closed package around the object by the sheet regularly folded and folded on this object. The pleated packing sheet may be of heat-shrinkable plastic material, of paper, or of metal (aluminum) coated with such material. This sheet may also be plain paper, and sealing can then be provided by the installation of a label provided by a distributor associated with a suitable head, mounted at the lower end of the rod of the cylinder 81. It is also possible a label is placed on the heat-sealed closure

  of the packaging. When the seal is completed, the seal

  The seal 82 is raised in the initial position, and the movable head 22 and the pressure plate 5 can also be raised to the initial position.

  following a race which, although weak (eg

  10 mm) is clearly sufficient for the

  positive in advance step by step can position and

  on the stationary tray 1, a new length of tape of the packaging material previously unwound by the rocker 74 and necessary for the cutting of a new sheet, the cut strip 85 being taken up by a friction or limiter drum.

  stress (not shown) rotated. Pen

  In these operations, the locking cylinder 57 releases the counter rod 54 and the support plate 52 is brought back by

  the cylinder 53 in the lower position (shown in

  shown in Figure 2). The ejection cylinder 61 actuates the ejection pusher 60: which transfers the packaged object 86 onto the evacuation slide 59, then returns to its initial position, and the support plate 52 is then brought back to the high position, at the level of the opening 26

  of the head 25 for a new cycle.

  It is clear that the invention is not

  limited to the example of realization which has just been

  crit. It is possible, for example, to replace the ram clamps of the step feed device with electromagnetically operated and movable clamps.

  back and forth along the grooves 3 of the fixed plate 1.

  In known manner, these clamps can also be

  replaced by intermittently rotating rollers.

  Similarly, the displacement of the flat ring 47 can be provided by a forked control. It should be noted that the vertical displacement bringing the cutting blade into the cutting position can also be ensured by an electromagnet disposed on the radial arm driven by the rotating ring or by a small jack, for example

  pneumatic. In addition, the self-feeding device

  The subject matter, which can be associated with the machine, must be adapted to the nature and consistency of the objects. For hard objects, a clamp device, such as that described and shown in Figures 1 and 3 in French Patent No. 73 05026 in the name of the Applicant, can perfectly replace the suction cup device for transferring the objects of a conveyor. feeding to packing and pleating heads

  22 and 25. For objects with a soft consistency, use

  will rather be a bucket and clamp device as described and shown in the figures in the patent

  French No. 77 38951 also in the name of the Applicant.

  The machine according to the present invention allows, on a single station, to cut the sheets

  packing and packing the objects in these sheets.

  It is possible, by means of the machine according to the present invention,

  packaging, not only products such as cheeses, sticky paper ribbons or

  write, or deodorant blocks already mentioned, but

  pack in creased leaves, possibly

  transparent pots, boxes and other objects fra-

  giles in glass, earth, sandstone, to protect in particular

  their labeling or closures.

Claims (12)

R E V E N D I C A T IO N S   1.- Machine for packing substantially cylindrical shaped objects into cut sheets   each in a closed contour, preferably circular   in a strip (85) of a flexible packing material, comprising a fixed packing head (25) and a movable packing head (22) in the form of two axle rings. common, capable of gripping together a packing sheet when they are brought against each other, and whose central openings (26, 27) are coaxial with at least one sleeve (29, 30) for the passage of the articles to be packaged, disposed in the extension of the central opening (26) of the fixed packaging head (25) and attached to the face of   the latter, which is not turned towards the head of   mobile tilting (22), a diaphragm device (51) having   partially seal the bushing (29, 30) in   beating the wrapping sheet on one of the faces of an object, after the latter has been arranged by its other   facing the part of the sheet closing the openings   central tines (26, 27) of the packaging heads (22, 25), then pushed with this sheet into the sleeve (29, 30) by a movable pusher (80), until it comes to rest against   a support plate (52) perpendicular to the axis of the   (29,30), a sealing member (82) being inserted   in the sleeve (29, 30) and applied, through the diaphragm (51), to the part of the packaging sheet folded over the object which rests against the support plate (52), after removal of the pusher mobile device (80) out of the socket (29, 30), characterized in that it also comprises, on the one hand, for sealing the strips (85) of the   flexible packaging material, a stationary tray (1), pre-   having a central opening (2) whose shape corresponds to   the contour of the leaves, and of which the   is slightly greater than that of the sheets, T 1 i and a movable pressing plate (5), parallel to the fixed plate (1) and having on its face opposite the latter a groove (14) having the shape of the outline sheets and facing the central opening (2) of the fixed plate (1) when the pressure plate (5) is applied against the latter, the pressure plate (5) also having an internal central opening (13)   at the throat (14), allowing the passage of the head of em-   mobile ballasting (22), and, on the other hand, for cutting   of a sheet in a strip (85) pressed between the   stationary water (1) and the pressure plate (5), a moving element (31, 39), following the outline of the leaves around the fixed packing head (25) disposed in the central opening (2) of the fixed platen (1) slightly recessed on the side of the latter opposite to that against which the pressing plate (5) is applied, and a cutting tool (46) carried by the moving element (31, 39) and   movable in a direction perpendicular to the   fixed (1) and pressing (5) plates between a cutting position, in which the tool (46) passes through the central opening (2) of the fixed plate (1) and is engaged in the groove (14) of the plate presser (5) and a rest position in which the tool (46) is at   less clear of the groove (14) of the pressure plate (5).   2. Machine according to claim 1 characterized in that the groove (14) is circular   and in that the moving element comprises a turn ring   nante (31) mounted in rotation about the sleeve (29,) and carrying a radial arm (39) at the outer end   which is mounted the cutting tool (46).   3. Machine according to claim 2,   characterized in that the cutting tool (46) is solid   a clevis (42) pivotally mounted on the end   external of the radial arm (39) about an axis (43)   perpendicular to the axis of rotation of the ring (31) and that a roller (44), rotatably mounted in the yoke (42) about a second axis (45) radial perpendicular to the axis of rotation of the ring (31) rolls on a ring   (47) loosely surrounding the rotating ring (31) and disengaging   translatable according to the axis of rotation of the   ring (31) for controlling the position of the transverse tool - 5 songs (46).   4. Machine according to claim 3, characterized in that the ring (47) rests by at least three cavities on as many spherical caps (48) carried by the rods of cylinders (49) for controlling the   axial translations of the ring (47) which is elastic   recalled to these cylinders (49).   5.- Machine according to one of the claims   1 to 4, characterized in that the pressure plate (5) has, on its face facing the fixed plate (1), and between its groove (14) and its central opening (13), a plurality of suction nozzles (16) opening into at least one annular channel (17) in communication with a vacuum source for plating a portion of the web (85) of the flexible packaging material closing the opening   (2) of the fixed plate (1) against the   (5) while cutting a sheet.   6.- Machine according to one of the claims   1 to 5, characterized in that the band (85) of   flexible material is maintained and moved between the   water (1) and the pressure plate (5) by a step feed device comprising at least one pair of   pliers (68) that can be moved on slides   res (70) along the fixed platen (1) by at least one   fork (63) pivotally mounted about a transverse axis   Versal (64) to the traveling direction of the web (85)   on the fixed platform (1) and operated by a jack (66).   7.- Machine according to one of the claims   1 to 6, characterized in that the faces facing the   packaging heads (22, 25) are provided with toothings   complementary dialects (23, 28) to initiate a fold   wise of a search they enclose, so as to pack the object in a folded sheet at its periphery, the axis W! common to the packaging heads (22, 25) and the socket   (29, 30) being vertical, the movable head (22) being   placed above the fixed head (25) as well as the   pressure plate (5) is arranged above the fixed plate (1).   8.- Machine according to one of the claims   1 to 7, characterized in that the movable packaging head   (22) is suspended from lost stroke on] the rods of   rins (19) mounted on gantries (18) integral with the   pressure plate (5) on both sides of its opening   center (f3), by means of tabs (20) diametrically   opposed, having openings through which rods of cylinders (19) whose ends bear   driving abutments (21) of the legs (20) which are   formed in counter-bent ears (24) to connect to the face of the movable head (22) which is not turned towards the fixed head (25).   9. Machine according to one of the claims   1 to 8, characterized in that the plateau pres.aur (5) is   slidably mounted along columns (4) connecting to the   fixed beam (1) fixed crosspieces (8) carrying cylinders (11) for controlling the displacement of the pressure plate (5) towards the fixed plate (1), by their rods provided at their free end spherical caps (12) cooperating with imprints of the pressure plate (5), which is Plasiquement recalled to the fixed cross members (8) by   springs (10, supported on the one hand against the   (1) on the other hand against the bottom (7)   through the lateral lugs (6) of the pressure plate (5),   and traversed with guidance by the columns (4).   10.- Machine according to one of the claims   1 to 9, characterized in that the support plate (52) mounted at the end of a rod of a jack (53) can be introduced by the latter into the socket (29, 30),   until its bearing surface is at the level of the   central opening (26) of the stationary packing head (25), which is pushed back with the object by the movable pusher (80), whose travel is limited so that the object is introduced into the bushing (29, 30) beyond the diaphragm device (51), the support plate (52) being immobilized in this position by a locking system (56, 57) the time of the operations of the diaphragm device (51) and the sealing member (82), then moved to remove the packaged object from the sleeve (29,) and place it in the path of an ejection member   (60,61) bringing it to an evacuation station (59).   II.- Machine according to any one of the   1 to 10, characterized in that the movable pusher (80) is in the form of an annular piston displaced by a cylinder (79) eccentric with respect to the axis of the packing heads ( 22-25), the sealing member (82) being axially displaceable through the annular piston (80) by   an axial jack (81) parallel to the eccentric jack (79).   12.- Machine according to any one of the   1 to 11, characterized in that the sealing member   (82) is a welding head for thermo- plastics.   13.- Machine according to any one of the   1 to 12, characterized in that it comprises a tag, operated by an axial jack (81) and coming to style the packed object.