EP0370970B1 - Device for checking the centering of a band of pockets with respect to the parts for heat-sealing film to the same band of pockets - Google Patents
Device for checking the centering of a band of pockets with respect to the parts for heat-sealing film to the same band of pockets Download PDFInfo
- Publication number
- EP0370970B1 EP0370970B1 EP19890830505 EP89830505A EP0370970B1 EP 0370970 B1 EP0370970 B1 EP 0370970B1 EP 19890830505 EP19890830505 EP 19890830505 EP 89830505 A EP89830505 A EP 89830505A EP 0370970 B1 EP0370970 B1 EP 0370970B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- band
- pockets
- station
- film
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B41/00—Supplying or feeding container-forming sheets or wrapping material
- B65B41/18—Registering sheets, blanks, or webs
Definitions
- the machines mentioned deal with the forming of pockets in a band of thermoformable material and subsequently with the filling of these pockets with products.
- the band of pockets is pulled, after filling, through a station which checks product presence in the pockets, a station where film is applied to seal the pockets, a station for cutting the individual blisters and parts designed to reject any faulty blisters, e.g. because one or more products are missing.
- the pocket-closing film is heat-sealed by appropriate parts to the band of pockets.
- the aim of the present invention is that of resolving the problem described, by producing a device which permits the centering of the band of pockets to be checked in the zone immediately up stream from the station designed to heat-seal the sealing-film to the band.
- the preamble of claim 1 is according to the prior art described above.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
Description
- The present invention falls within the technical sector of automatic machines for packaging of various products in portions of a band of pockets; these portions are commonly called "blisters".
- In particular the products consist of medicinal products such as capsules, tablets and similar.
- The machines mentioned deal with the forming of pockets in a band of thermoformable material and subsequently with the filling of these pockets with products. The band of pockets is pulled, after filling, through a station which checks product presence in the pockets, a station where film is applied to seal the pockets, a station for cutting the individual blisters and parts designed to reject any faulty blisters, e.g. because one or more products are missing. The pocket-closing film is heat-sealed by appropriate parts to the band of pockets.
- Blister packaging involves the problem of checking the exact centering of the band of pockets with respect to the parts which heat-seal the sealing film to the pockets. In fact heat-sealing takes place by pressing the film and the band of pockets between an upper sealing plate and a lower plate containing cavities in correspondence with the pockets, therefore an imperfect centering leads to the partial or total squashing of the pocket.
- The known machines are therefore generally fitted with devices for checking the centering of the band of pockets with respect to the parts heat-sealing the sealing film to the pockets, to signal any imperfection in the blisters produced.
- These devices, in the known form, envisage the forming of dimples, along the edge of the band of pockets, at equal distances defining corresponding housings accessible from above. In each of the said housings, in correspondence with a checking station, a suitable feeler pin will be inserted to check the centering of the band.
- In this case the checking takes place up-stream of the sealing-film application station, since the said housings must be open to receive the checking feeler pin. This results in the scarce reliability of the same check, since the relatively large distance between the checking position and that where the sealing-film is heat-sealed to the band of pockets does not ensure the absence of errors.
- It should also be emphasised that a change in the size of the band of pockets, as occurs frequently with the production of various products, also involves the need to move the position of the checking feeler pin. For this reason the structure of the machine is more complicated and more manpower is required.
- Another device adopted on the known machines envisages the presence of a feeler pin arranged down-stream of the heat-sealing parts designed to pass from below between two adjacent pockets of the band of pockets. This feeler pin can, however, only detect the incorrect position of the pocket after heat-sealing, due to the effect of the slipping of the band with respect to the predetermined centering position; also the squashing of the pocket, which is the most serious effect of this slipping, is not detected.
- On the other hand it is not possible to place this tracer device up-stream of the heat-sealing parts, since contact between the feeler pin and the open belt could lead to jolting of the band itself and thus knock the products out of the pockets.
- Moreover, in this case also, the position of the checking feeler pin depends on the size of the blister and must therefore be changed when size changes are made.
- The aim of the present invention is that of resolving the problem described, by producing a device which permits the centering of the band of pockets to be checked in the zone immediately up stream from the station designed to heat-seal the sealing-film to the band.
- Another aim of this invention is to propose a device which is produced as a simple technical solution, both functional and reliable, as well as versatile in relation to the different blister sizes to be produced.
- The above-mentioned aims are achieved by the present device for checking the centering of a band of pockets with respect to the parts designed to heat-seal a film to the band of pockets, this device being made according to the invention as described in the Claims.
- The preamble of claim 1 is according to the prior art described above.
- The device according to this invention permits a check on the centering of the band of pockets immediately up-stream of the parts designed to heat-seal the film to close the band, i.e. in correspondence with zone where the blisters are ready for sealing.
- This solution prevents in practise any possible centering errors.
- The centering check is also made on the moving band; the band may therefore be pulled with continuous infeed.
- Specific emphasis should be given to the fact that the present device functions regardless of the band size, since it is based on the detection of a raised point made in the band. It is, therefore, not necessary to make any modifications or adjustments when this size changes.
- The features of the invention are more clearly seen in the description of a version of the preferred type of device for checking the centering of a band of pockets with respect to the parts which heat-seal the film to the same band of pockets, illustrated in the enclosed drawings, in which:
- figure 1 shows a schematic view of the line for packaging products in blisters including the device subject of this invention for checking the centering of the band with pockets;
- figure 2a and 2b show a detailed picture of the said detecting elements, respectively in their non-operative stage and in the stage where they detect the passage of the said raised point created in the band of pockets;
- figure 3 shows a view from above of the said band of pockets in the area where the device subject of the invention operates.
- In particular, with reference to these figures, the band of thermoformable material indicated with 1 is pulled, in the infeed direction indicated by A, along a line for
packaging products 2 such as tablets, capsules and similar. - In the first part of the packaging line, the band 1 unwinds horizontally from a
reel 3 and is pulled in step through a formingstation 4. The formingstation 4 consists, essentially of alower mould 5 and anupper mould 6 designed to work together to create a series ofpockets 7 in the band 1, with the open part uppermost. - For this purpose the
lower mould 5 contains, vacuum formed, the die 8 of these pockets, whereas theupper mould 6 contains the relative punches 9. - The
lower mould 5 also bears the profile of anotherpunch 10 which works together with acorresponding die 11 on theupper mould 6 to form on theband 1 a raisedpoint 12 which, as described below, is designed to check the centering of the band of pockets with respect to the parts which heat-seal the film to seal thepockets 7. The raisedpoint 12 is created along the longitudinal center-line axis of the band 1, up-stream of thepockets 7 created at the same time. As appropriate, it is envisaged that at each step pockets are created in order on the band corresponding to a number of blister packs; the case illustrated shows the formation of pockets relative to four blisters, as can be seen in figure 3. - Down-stream of the forming
station 4, the band of pockets is pulled with continuous infeed. For this purpose a compensating section has been included, more clearly indicated with 1a, which runs between tworollers - Subsequently, the packaging line consists of a
filling station 15 where thepockets 7 are filled with therelative products 2; anotherstation 16 detects the presence of products in the pockets, this consists of a series of sensors of the known type interlocked with acontrol unit 17, by means of the connection B. - Down-stream of the
detection station 16 there is aclosing station 18 where thepockets 7 are sealed with afilm 19 in a heat-sealing material, e.g. aluminium. At the entrance to theclosing station 18 there is the checking device subject of this invention, indicated in the layout withnumber 20. - Finally, the packaging line has a
station 21 for cutting the band 1 into single portions, corresponding to therespective blisters 22, andparts 23 designed to reject the faulty portions; theparts 23 are interlocked to thecontrol unit 17, by means of the connection C. - The
station 18 for sealing thepockets 7 is equipped with the traditional parts for the heat-sealing of thefilm 19 to the band of pockets 1. These heat-sealing parts consist of alower sealing plate 24 and anupper sealing plate 25; thelower plate 24 has a series ofcavities 26 to match thepockets 7, to permit the gripping of the band 1 without squashing the same pockets. - The
plates relative cylinders frame 29; the guidingframe 29 slides alongshafts 30 arranged lengthwise with respect to the band 1. - The
checking device 20 consists of detectingelements 31 designed to signal the passage of the raisedpoint 12 created in the band 1, illustrated in detail in figure 2a and 2b. These detectingelements 31 consists of aroller 32 placed horizontally across the band 1. Theroller 32 is held so that it turns, by pair ofsymmetrical arms 33, at the opposite ends, attached, with a central fulcrum on apin 34, to asupport 35. - The
arms 33 of theroller 32 are designed to activate, at the free end, asensor 36 which commands, through connection D, thecontrol unit 17. - The
roller 32 normally rests on thefilm 19 which lies on top of the band of pockets 1 (figure 2a). On the passage of the raisedpoint 12, which protrudes upwards from the band 1 and can be detected through thefilm 19, theroller 32 is raised, causing a slight angular rotation of thearms 33 on thepin 34; the movement of thearms 33 enables the sensor 36 (figure 2b). - Then a centering check signal for the band of pockets 1 is sent to
unit 17. This signal must in fact be in correct timing with the operation of the parts which heat-seal thefilm 19 to the band 1. - Heat-sealing is achieved by gripping the band 1 and the
film 19 between theplates cylinders plates frame 29 moves along theshafts 30, as indicated by thebroken line 29a in figure 1. Subsequently, theplates guide frame 29, while the band of pockets covered with the heat-sealedfilm 19 maintains its continuous infeed movement towards thecutting station 21. - If the checking signal sent by the detecting
elements 31 is not in timing with the sequence for heat-sealing thefilm 19 to the band 1, e.g. due to sliding and/or lengthwise distortion of the same band, theunit 17 may interrupt the heat-sealing parts. As an alternative, it is possible to signal theparts 23 to reject the faulty blister, as indicated diagrammatically with thebroken line 23a in figure 1. - Obviously it is possible to arrange for the raised
point 12 to be placed in a different position from that described here, with respect to the series of pockets made with each moulding phase.
Claims (5)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT496088U IT215984Z2 (en) | 1988-11-21 | 1988-11-21 | DEVICE FOR THE CONTROL OF THE CENTERING OF AN ALVEOLED TAPE COMPARED TO THE BODIES REALIZING THE THERMAL WELDING OF A FILM TO THE SAME ALVEOLED TAPE |
IT496088U | 1988-11-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0370970A1 EP0370970A1 (en) | 1990-05-30 |
EP0370970B1 true EP0370970B1 (en) | 1992-10-21 |
Family
ID=11116474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890830505 Expired - Lifetime EP0370970B1 (en) | 1988-11-21 | 1989-11-17 | Device for checking the centering of a band of pockets with respect to the parts for heat-sealing film to the same band of pockets |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0370970B1 (en) |
DE (1) | DE68903266T2 (en) |
IT (1) | IT215984Z2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5269123A (en) * | 1989-12-29 | 1993-12-14 | Massimo Marchesini | Device for sealing a film onto a blister band, particularly a polypropylene band |
IT1235993B (en) * | 1989-12-29 | 1992-12-15 | Massimo Marchesini | IMPROVED DEVICE MAKING THE THERMO-WELDING OF A FILM TO A HONEYCOMB TAPE, IN PARTICULAR POLYPROPYLENE TAPE |
EP2740679B2 (en) | 2012-12-04 | 2019-12-04 | MULTIVAC Sepp Haggenmüller SE & Co. KG | Deep draw packaging machine with clock cycled positioning of a sealing station and corresponding method |
AR105231A1 (en) * | 2015-06-09 | 2017-09-20 | Cryovac Inc | APPARATUS AND PROCESS TO PACK PRODUCTS |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4349997A (en) * | 1980-04-21 | 1982-09-21 | Mitsubishi Jukogyo Kabushiki Kaisha | Device for enabling registry of operations in an apparatus for continuously forming containers filled with material |
-
1988
- 1988-11-21 IT IT496088U patent/IT215984Z2/en active
-
1989
- 1989-11-17 DE DE1989603266 patent/DE68903266T2/en not_active Expired - Fee Related
- 1989-11-17 EP EP19890830505 patent/EP0370970B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE68903266D1 (en) | 1992-11-26 |
EP0370970A1 (en) | 1990-05-30 |
IT8804960V0 (en) | 1988-11-21 |
IT215984Z2 (en) | 1991-03-26 |
DE68903266T2 (en) | 1993-05-19 |
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