WO2006112712A2 - Device and method for opening a plastic packaging of a stack of can lids - Google Patents

Device and method for opening a plastic packaging of a stack of can lids Download PDF

Info

Publication number
WO2006112712A2
WO2006112712A2 PCT/NL2006/050086 NL2006050086W WO2006112712A2 WO 2006112712 A2 WO2006112712 A2 WO 2006112712A2 NL 2006050086 W NL2006050086 W NL 2006050086W WO 2006112712 A2 WO2006112712 A2 WO 2006112712A2
Authority
WO
WIPO (PCT)
Prior art keywords
envelope
lids
stack
opening
chamber
Prior art date
Application number
PCT/NL2006/050086
Other languages
French (fr)
Other versions
WO2006112712A3 (en
Inventor
Jan Jasper Jacob Van Oord
Original Assignee
Celema B.V.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Celema B.V. filed Critical Celema B.V.
Publication of WO2006112712A2 publication Critical patent/WO2006112712A2/en
Publication of WO2006112712A3 publication Critical patent/WO2006112712A3/en

Links

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
    • B65B69/00—Unpacking of articles or materials, not otherwise provided for
    • B65B69/0066—Heating materials to facilitate their unpacking

Definitions

  • the present invention relates to a "device for opening an envelope of a stack of can lids, comprising opening means for locally disintegrating the envelope and lifting means for lifting the envelope from the stack of can lids. .
  • This device is intended for opening paper envelopes.
  • the object of the invention is to provide a device for opening a stack of can lids, wherein, even in a plastic envelope, the lids are not contaminated by the melted plastic.
  • the opening means comprise a nozzle which is connected to a source of hot gas.
  • the lifting means comprise a chamber which is open on its side directed toward the envelope, as well as vacuum means for generating and sustaining an underpressure in the chamber.
  • the construction is simplified in that the opening means are arranged in the chamber with the vacuum.
  • a further embodiment provides the measure that the lifting means and the opening means are placed together on a carrier movable in axial direction along the stack of can lids. This measure also has a highly effective result; the envelope is after all only moved away from the stack of can lids at the position where it is opened.
  • the invention can be implemented in diverse configurations.
  • the vacuum chamber is disposed fixedly together with the nozzle. Both then have a length corresponding to that of a stack of can lids for opening.
  • a relative movement takes place between the combination of nozzle and chamber on the one hand and the stack of can lids on the other.
  • the stack of can lids can herein be disposed fixedly for the duration of the opening process, as in the above embodiments, but it is also possible to have the stack of can lids move in a continuous movement along the combination of nozzle and vacuum chamber.
  • the nozzle debouches in the chamber so that the nozzle supplies gas to the chamber. In order to sustain a vacuum in the nozzle, this flow volume must be discharged. Leakage will however also occur, so that the flow rate of the pump means for the purpose of sustaining the vacuum must be greater than the flow rate leaving the nozzle.
  • the carrier is also movable along at least one of the end surfaces of the stack of can lids. Separate provisions for opening the end surfaces hereby become unnecessary. Once the envelope has been opened by the above stated measures, it must be removed. This can take place after the whole envelope has been opened, but it is also possible for the envelope to be removed immediately at the position where it is opened. Use can be made in both situations of rubber rollers on which the stack of can lids is placed. When they are driven in rotation, these rollers of abrasive material will carry away the loose envelope.
  • Figure 1 is a schematic perspective view of a device according to the invention
  • Figure 2 is a cross-sectional view of a detail of the device shown in figure 1.
  • the object of the device according to the invention is to open a packaging of a stack of can lids. After being produced, can lids are packaged per stack to allow transport to the location where they are placed on a can. Upon arrival at this location, a thus packaged stack of can lids must be unpacked.
  • Figure 1 shows a gutter-shaped holder 1 in which a packaged stack of can lids 2 is placed.
  • Figure 1 shows a stack of round can lids; can lids of different shapes, such as oval, rectangular with rounded corners or ham slice-shaped can be processed instead.
  • the stack of can lids is packaged in an envelope of for instance plastic.
  • gutter-shaped holder 1 In the longitudinal direction of gutter-shaped holder 1 is arranged a rail 4 which is provided at one end with a bent part 5.
  • a carriage 6 can be moved along rail 4, including its bent end.
  • This carriage 6 can be driven by an electric motor which is integrated in the carriage but not shown, although it can also be driven by a linear motor or by a pneumatic drive device.
  • a vacuum chamber 7 is fixed to carriage 6. This vacuum chamber 7 is connected to carriage 6 such that the open lower surface of vacuum chamber 7 is situated a short distance above a stack of can lids 2 placed in gutter-shaped holder 1.
  • Vacuum chamber 7 is shown in more detail in figure 2.
  • vacuum chamber 7 is takes a substantially cylindrical form. On its top side the chamber 7 is closed by a plug 10, and on its underside the chamber 7 is open.
  • the contour 9 of wall 8 of chamber 7 is preferably adapted on its underside to the shape of can lids, the envelope of which must be opened.
  • Chamber 7 is provided with a lateral connecting stub 11 for connecting a pump for the purpose of creating a vacuum in the chamber.
  • a tube 13 is arranged in the interior of chamber 7. Tube 13 extends through plug 10. On its upper side the part of tube 13 protruding outside the plug forms a connecting stub for connection of a source of a hot gas such as hot air. On its underside the tube is provided with a nozzle 14 which lies just inside contour 9. Nozzle 14 has a flattened form.
  • the vacuum source is switched on, whereby a vacuum is created in chamber 7.
  • the envelope 3 of the stack of can lids 2 will hereby be pulled toward chamber 7, wherein the situation is obtained as shown in figure 2.
  • the hot air source is then switched on, whereby hot air will flow from nozzle 14. This hot air will cause envelope 3 to melt locally or at least weaken it such that it tears as a result of the forces which prevail in the transverse direction of the stack of can lids 2 in envelope 3 and which are at least partly caused by the displacement of the envelope toward vacuum chamber 7 as a result of the vacuum prevailing in vacuum chamber 7.
  • Chamber 7 is then moved along tail 4 in the longitudinal direction of the stack of can lids 2, wherein envelope 3 is opened locally during the movement so that as a result of the movement an elongate opening is obtained extending in the longitudinal direction of the stack of can lids 2, whereafter envelope 3 can be easily removed.
  • vacuum chamber 7 can also move along the bent part 5 of rail 4, wherein one of the end surfaces of the envelope is also opened.
  • the device according to the invention can be combined with a device for the removal of the released envelope.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vacuum Packaging (AREA)

Abstract

The invention relates to a device for opening the envelope (3) of a stack of can lids (2), comprising opening means for locally disintegrating the envelope and lifting means for lifting the envelope, wherein the opening means comprise a nozzle (14) which is connected to a source of a hot gas. This object is achieved as a result of the measure of lifting the envelope from the can lids prior to opening of the envelope, and melting the envelope with a jet of a hot gas. According to a preferred embodiment, the lifting means comprise a chamber (7) which is open on its side directed toward the envelope, as well as vacuum means for generating and sustaining an underpressure in the chamber. This measure has the result that the envelope is moved away from the stack of can lids without prior contact with the stack of can lids or the envelope. This embodiment furthermore requires only a simple construction.

Description

Device and method for opening a plastic packaging of a stack of can lids
The present invention relates to a "device for opening an envelope of a stack of can lids, comprising opening means for locally disintegrating the envelope and lifting means for lifting the envelope from the stack of can lids. .
Such a device and method are known from DE-A-39 02454.
In this prior art the envelope is cut by opening means in the form of a cutting member.
This device is intended for opening paper envelopes.
Increasingly greater use is recently being made of plastic envelopes for stacks of can lids. It is known to open such envelopes by directing a jet of hot gas at an enveloped stack of can lids. The envelope is hereby melted locally. This results however in contamination of the can lids because the melting process takes place in contact with the lids. This is aggravated by the fact that the envelope is not in contact with the lids between the lids. When heated by the hot gas jet, the envelope material will melt there . first and form grains which then adhere to the lids.
The object of the invention is to provide a device for opening a stack of can lids, wherein, even in a plastic envelope, the lids are not contaminated by the melted plastic.
This object is achieved in that the opening means comprise a nozzle which is connected to a source of hot gas.
As a result of the measure of lifting the envelope from the can lids prior to opening of the envelope and melting the envelope with a jet of a hot gas this object is achieved.
According to a preferred embodiment, the lifting means comprise a chamber which is open on its side directed toward the envelope, as well as vacuum means for generating and sustaining an underpressure in the chamber. This measure has the result that the envelope is moved away from the stack of can lids without prior contact with the stack of can lids or the envelope. This embodiment furthermore requires only a simple construction.
The construction is simplified in that the opening means are arranged in the chamber with the vacuum.
A further embodiment provides the measure that the lifting means and the opening means are placed together on a carrier movable in axial direction along the stack of can lids. This measure also has a highly effective result; the envelope is after all only moved away from the stack of can lids at the position where it is opened.
The invention can be implemented in diverse configurations. According to a first embodiment, the vacuum chamber is disposed fixedly together with the nozzle. Both then have a length corresponding to that of a stack of can lids for opening.
It is also possible to dispose the chamber fixedly and to move the nozzle inside the chamber relative to the chamber and the stack of can lids for opening.
According to another embodiment, which is preferred at present, a relative movement takes place between the combination of nozzle and chamber on the one hand and the stack of can lids on the other. The stack of can lids can herein be disposed fixedly for the duration of the opening process, as in the above embodiments, but it is also possible to have the stack of can lids move in a continuous movement along the combination of nozzle and vacuum chamber.
The nozzle debouches in the chamber so that the nozzle supplies gas to the chamber. In order to sustain a vacuum in the nozzle, this flow volume must be discharged. Leakage will however also occur, so that the flow rate of the pump means for the purpose of sustaining the vacuum must be greater than the flow rate leaving the nozzle.
According to a further preferred embodiment, the carrier is also movable along at least one of the end surfaces of the stack of can lids. Separate provisions for opening the end surfaces hereby become unnecessary. Once the envelope has been opened by the above stated measures, it must be removed. This can take place after the whole envelope has been opened, but it is also possible for the envelope to be removed immediately at the position where it is opened. Use can be made in both situations of rubber rollers on which the stack of can lids is placed. When they are driven in rotation, these rollers of abrasive material will carry away the loose envelope.
The present invention will now be elucidated with reference to the following drawings, in which: Figure 1 is a schematic perspective view of a device according to the invention; and Figure 2 is a cross-sectional view of a detail of the device shown in figure 1.
The object of the device according to the invention is to open a packaging of a stack of can lids. After being produced, can lids are packaged per stack to allow transport to the location where they are placed on a can. Upon arrival at this location, a thus packaged stack of can lids must be unpacked.
Figure 1 shows a gutter-shaped holder 1 in which a packaged stack of can lids 2 is placed. Figure 1 shows a stack of round can lids; can lids of different shapes, such as oval, rectangular with rounded corners or ham slice-shaped can be processed instead. The stack of can lids is packaged in an envelope of for instance plastic.
In the longitudinal direction of gutter-shaped holder 1 is arranged a rail 4 which is provided at one end with a bent part 5. A carriage 6 can be moved along rail 4, including its bent end. This carriage 6 can be driven by an electric motor which is integrated in the carriage but not shown, although it can also be driven by a linear motor or by a pneumatic drive device.
A vacuum chamber 7 is fixed to carriage 6. This vacuum chamber 7 is connected to carriage 6 such that the open lower surface of vacuum chamber 7 is situated a short distance above a stack of can lids 2 placed in gutter-shaped holder 1.
Vacuum chamber 7 is shown in more detail in figure 2. In the present exemplary embodiment vacuum chamber 7 is takes a substantially cylindrical form. On its top side the chamber 7 is closed by a plug 10, and on its underside the chamber 7 is open. The contour 9 of wall 8 of chamber 7 is preferably adapted on its underside to the shape of can lids, the envelope of which must be opened.
Chamber 7 is provided with a lateral connecting stub 11 for connecting a pump for the purpose of creating a vacuum in the chamber. A tube 13 is arranged in the interior of chamber 7. Tube 13 extends through plug 10. On its upper side the part of tube 13 protruding outside the plug forms a connecting stub for connection of a source of a hot gas such as hot air. On its underside the tube is provided with a nozzle 14 which lies just inside contour 9. Nozzle 14 has a flattened form.
During the operation of the above described device the vacuum source is switched on, whereby a vacuum is created in chamber 7. The envelope 3 of the stack of can lids 2 will hereby be pulled toward chamber 7, wherein the situation is obtained as shown in figure 2. The hot air source is then switched on, whereby hot air will flow from nozzle 14. This hot air will cause envelope 3 to melt locally or at least weaken it such that it tears as a result of the forces which prevail in the transverse direction of the stack of can lids 2 in envelope 3 and which are at least partly caused by the displacement of the envelope toward vacuum chamber 7 as a result of the vacuum prevailing in vacuum chamber 7.
Chamber 7 is then moved along tail 4 in the longitudinal direction of the stack of can lids 2, wherein envelope 3 is opened locally during the movement so that as a result of the movement an elongate opening is obtained extending in the longitudinal direction of the stack of can lids 2, whereafter envelope 3 can be easily removed.
As shown in figure 1, vacuum chamber 7 can also move along the bent part 5 of rail 4, wherein one of the end surfaces of the envelope is also opened.
Diverse modifications can be made to the device shown here without departing from the invention. Instead of a nozzle with hot air, it is thus for instance possible to make use of another heat source such as a filament, a flame or a laser source. This does however assume the presence of an envelope, such as an envelope of plastic, which can be disintegrated by heat. The application of a knife is not precluded for other types of envelope.
It is possible here for the end surfaces on both sides of the stack of can lids 2 to be opened; a rail 4 will have to be applied for this purpose which is provided on both sides with a bent end 5.
The device according to the invention can be combined with a device for the removal of the released envelope.

Claims

Claims
1. Device for opening the envelope of a stack of can lids, comprising opening means for locally disintegrating the envelope and lifting means for lifting the envelope, characterized in that the opening means comprise a nozzle which is connected to a source of a hot gas.
2. Device as claimed in claim 1 , characterized in that the lifting means comprise a chamber which is open on its side directed toward the envelope, and vacuum means for generating and sustaining an underpressure in the chamber.
3. Device as claimed in claim 1 or 2, characterized in that the nozzle is arranged in the chamber.
4. Device as claimed in claim 1 , 2 or 3, characterized in that the chamber and the nozzle are placed together on a carrier movable in axial direction relative to the stack of can lids.
5. Device as claimed in claim 1, 2 or 3, characterized in that the chamber is disposed fixedly and that it extends over a substantial part of the length of a stack of can lids for opening.
6. Device as claimed in claim 5, characterized in that the nozzle is disposed fixedly and that it extends over the whole length of the lifting means.
7. Device as claimed in claim 5, characterized in that the nozzle is movable inside the chamber.
8. Device as claimed in any of the foregoing claims, characterized in that the flow rate of the hot gas leaving the nozzle is lower than the flow rate of the pump means.
9. Device as claimed in any of the claims 3-6, characterized in that the carrier is also movable along at least one of the end surfaces of the stack of can lids.
10. Device as claimed in any of the foregoing claims, characterized by means for removing the released envelope.
11. Method for opening an envelope of a stack of can lids, wherein an opening member is moved in the axial direction relative to the stack of can lids, characterized in that the envelope is opened by a jet of hot gas from a nozzle.
12. Method as claimed in claim 11 , characterized in that the envelope is moved away from the stack of can lids by an underpressure.
13. Method as claimed in claim 11 or 12, characterized in that the feed of hot gas takes place simultaneously with the generating of an underpressure.
14. Method as claimed in any of the claims 11-13, characterized in that following on from the movement in axial direction along the can lids, the opening member is moved along at least one end surface of the stack of can lids.
15. Method as claimed in any of the claims 11-14, characterized in that after opening of the envelope, the envelope is removed from the stack of can lids.
PCT/NL2006/050086 2005-04-18 2006-04-18 Device and method for opening a plastic packaging of a stack of can lids WO2006112712A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1028794A NL1028794C2 (en) 2005-04-18 2005-04-18 Device and method for opening a plastic package from a stack of can lids.
NL1028794 2005-04-18

Publications (2)

Publication Number Publication Date
WO2006112712A2 true WO2006112712A2 (en) 2006-10-26
WO2006112712A3 WO2006112712A3 (en) 2007-03-29

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PCT/NL2006/050086 WO2006112712A2 (en) 2005-04-18 2006-04-18 Device and method for opening a plastic packaging of a stack of can lids

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WO (1) WO2006112712A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009044258A2 (en) * 2007-10-03 2009-04-09 Corima International S.R.L. Machine for cutting products paper wrapping, in particula of stacks of covers
DE102016007783A1 (en) * 2016-06-24 2017-12-28 Giesecke+Devrient Currency Technology Gmbh Method, device and system for opening valuable document packaging
DE102021107386A1 (en) 2021-03-24 2022-09-29 Dematic Gmbh Apparatus and method for automatically removing a film wrap from palletized stacks of products

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1097859A (en) * 1965-04-23 1968-01-03 Wiking Lars Improved apparatus for opening a package having a wrapping of heat sensitive foil material
JPH02166033A (en) * 1988-12-09 1990-06-26 Kirin Brewery Co Ltd Removing apparatus for stretch packing material
US5613346A (en) * 1993-06-21 1997-03-25 Kirin Beer Kabushiki Kaisha Apparatus for removing packing material from packed article
JP2002316115A (en) * 2001-04-19 2002-10-29 Nippon Denka Koki Kk Method and apparatus for peeling label of bottle
WO2003091115A1 (en) * 2002-04-23 2003-11-06 Techno Italy S.R.L. Apparatus and method for removing the wrapping film from a package of objects, in particular of lids
EP1468920A1 (en) * 2003-04-18 2004-10-20 Rotfil S.r.l. Method for opening a protective covering of a roll of wound metallic material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1097859A (en) * 1965-04-23 1968-01-03 Wiking Lars Improved apparatus for opening a package having a wrapping of heat sensitive foil material
JPH02166033A (en) * 1988-12-09 1990-06-26 Kirin Brewery Co Ltd Removing apparatus for stretch packing material
US5613346A (en) * 1993-06-21 1997-03-25 Kirin Beer Kabushiki Kaisha Apparatus for removing packing material from packed article
JP2002316115A (en) * 2001-04-19 2002-10-29 Nippon Denka Koki Kk Method and apparatus for peeling label of bottle
WO2003091115A1 (en) * 2002-04-23 2003-11-06 Techno Italy S.R.L. Apparatus and method for removing the wrapping film from a package of objects, in particular of lids
EP1468920A1 (en) * 2003-04-18 2004-10-20 Rotfil S.r.l. Method for opening a protective covering of a roll of wound metallic material

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 424 (M-1024), 12 September 1990 (1990-09-12) & JP 02 166033 A (KIRIN BREWERY CO LTD), 26 June 1990 (1990-06-26) *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 02, 5 February 2003 (2003-02-05) & JP 2002 316115 A (NIPPON DENKA KOKI KK; KSP JOINT LAB:KK), 29 October 2002 (2002-10-29) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009044258A2 (en) * 2007-10-03 2009-04-09 Corima International S.R.L. Machine for cutting products paper wrapping, in particula of stacks of covers
WO2009044258A3 (en) * 2007-10-03 2009-08-13 Corima Internat S R L Machine for cutting products paper wrapping, in particula of stacks of covers
DE102016007783A1 (en) * 2016-06-24 2017-12-28 Giesecke+Devrient Currency Technology Gmbh Method, device and system for opening valuable document packaging
US10981687B2 (en) 2016-06-24 2021-04-20 Giesecke+Devrient Currency Technology Gmbh Method, device and system for opening valuable document packages
DE102021107386A1 (en) 2021-03-24 2022-09-29 Dematic Gmbh Apparatus and method for automatically removing a film wrap from palletized stacks of products

Also Published As

Publication number Publication date
NL1028794C2 (en) 2006-10-20
WO2006112712A3 (en) 2007-03-29

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