EP0179454A2 - Procédé pour la formation d'un emballage fermé par un adhésif - Google Patents

Procédé pour la formation d'un emballage fermé par un adhésif Download PDF

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Publication number
EP0179454A2
EP0179454A2 EP85113446A EP85113446A EP0179454A2 EP 0179454 A2 EP0179454 A2 EP 0179454A2 EP 85113446 A EP85113446 A EP 85113446A EP 85113446 A EP85113446 A EP 85113446A EP 0179454 A2 EP0179454 A2 EP 0179454A2
Authority
EP
European Patent Office
Prior art keywords
adhesive
applicator
plastic component
package
plastic
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.)
Ceased
Application number
EP85113446A
Other languages
German (de)
English (en)
Other versions
EP0179454A3 (fr
Inventor
Reid A. Mahaffy
George W. Anderson
Eugene Garson
John A. Giordano
Robert E. Hirt
Milan R. Ostrow
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahaffy and Harder Engineering Co
Original Assignee
Mahaffy and Harder Engineering Co
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 Mahaffy and Harder Engineering Co filed Critical Mahaffy and Harder Engineering Co
Publication of EP0179454A2 publication Critical patent/EP0179454A2/fr
Publication of EP0179454A3 publication Critical patent/EP0179454A3/fr
Ceased legal-status Critical Current

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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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/02—Applying adhesives or sealing liquids
    • B65B51/023—Applying adhesives or sealing liquids using applicator nozzles
    • 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
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
    • B65B9/04—Enclosing successive articles, or quantities of material between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material

Definitions

  • This invention relates to a method and apparatus for packaging by forming adhesively sealed packages. More particularly, this invention relates to a method and apparatus for automatically forming packages using two webs of plastic material and a hot melt adhesive applied along a seal-line.
  • US - A - 3,061,984 illustrates packaging apparatus of known type for making hermetically-sealed vacuum packages using heat sealing to weld together two webs of plastic packaging material to form the packages.
  • the inner surfaces of each of the two webs of packaging material typically will be of the same composition or otherwise compatible to be able to be welded by heating.
  • sealants on the inner surfaces of the two webs forming the package were formulated so that the hermetic seal could be opened with a relatively low force by peeling the two package components apart.
  • Hot melt adhesives for sealing vacuum packages have found limited use, even though they offer certain advantages in reducing the cost of the packaging materials required, as well as in providing the ability to reclose and re-seal the packages after the initial opening.
  • Hot melt adhesives have been applied by several methods.
  • One method includes applying the hot melted adhesive to one of two package components comprising a partially processed semi-rigid component with the application being made at a time well in advance of the actual packaging operation.
  • the hot melt adhesive must be allowed to cool and then be reactivated at the time of sealing by using heat and pressure. This method is more expensive to carry out than a simple in-line adhesive application method, and has been practical only when used on semi-rigid material.
  • a further method, which has had limited commercial use, is the application of the adhesive by a hot melt adhesive applicator gun which may be stationary while the packages move past the gun; alternatively, the guns may be traversed over the desired patterns of the package, or a combination of these two approaches may be used.
  • the traversing gun has represented the best technique since it requires only one gun per package being traversed.
  • the guns and their carriers must be started and stopped in their traversing path once for every pattern being laid down. Accordingly,the acceleration as well as the stopping of the moving guns places an upper practical limit on the number of packages which can be processed in a given time period.
  • the traversing equipment is complicated and expensive to manufacture and maintain.
  • a method and apparatus for packaging products between first and second plastic components sealed by using a hot melt adhesive applied by a dispensing applicator in one of several serially arranged stations of a packaging operation.
  • the first plastic component of the package is supported for indexing movement on a transporting means or is formed therein by known forming techniques and is moved under a hot melt applicator which is continuously driven in a predetermined path of travel which in part traverses the entire periphery of the first plastic component which is loaded with the product being packaged.
  • the first plastic component is stopped under the path of travel of the applicator for a predetermined dwell time, while the applicator is actuated to apply the hot melt adhesive.
  • the first plastic component is advanced and the second plastic component is applied thereover to form the package which then is evacuated and sealed by bringing the second plastic component into intimate contact with the hot melt adhesive surrounding the periphery of the first plastic component.
  • Means are provided for preventing the dripping of adhesive on or into the contents of the first plastic component during its indexing move between stations and contact is minimized between the first and second plastic components in the evacuation station to prevent adhesive contamination of the apparatus. This is accomplished in one embodiment by separating the first and second plastic components in the area of evacuation by spring biased web lifters, as by a spacing of not less than 0,9525 ca from the opening through which the evacuation takes place. Alternatively, or in combination, gas pressure may be applied between the components causing the top plastic component of the package to tent upward in the critical evacuation area.
  • the first and second plastic components are formed of sheets of flexible plastic material, semi-rigid material or combinations of these materials. Furthermore, the second plastic component whether it be flexible or of a semi-rigid material may be back-formed in the apparatus.
  • the invention relates to methods and apparatus employing hot melt applicators which are continuously driven.
  • the applicators are driven continuously even though the packages which are being formed may be temporarily stationary or in indexing movement through the various packaging apparatus.
  • the package components may involve either preformed trays, back-formed platforms and/or trays or platforms which are formed from two webs by the apparatus in one continuous process.
  • the adhesive applicator is driven either separately or using the machine drive of the apparatus in which it is incorporated and may be applied and installed on a variety of packaging machines.
  • the adhesive applicator of the traversing gun type of the present invention will be described in connection with a packaging machine of the die train type as in the aforesaid
  • the packaging machine referred to generally with the reference character 10, uses a train of individual two-abreast dies 14 which are driven through the machine 10 past a plurality of work stations A, B, C, D, and E by drive motor 16 driving a Geneva drive 18 which in turn indexes the die train 12 through the packaging stations in the usual manner.
  • the direction of the die train movement is indicated by the arrow 20 which will be referred to as the machine direction.
  • a display side web roll 22 feeds a web of suitable flexible or semi-rigid plastic to the die train 12 where a first plastic package component 26 is formed in the dies as described in previously mentioned US-A-3,061,984. As has been pointed out, these first plastic package components 26 may be formed or may be preformed receptacles, etc.
  • a feed conveyor 28 transports the product to loading.
  • station A where the product to be packaged may be manually or machine loaded (not shown).
  • the loaded first plastic package component 26 is then indexed to an adhesive applicator station B .
  • the adhesive applicator station B includes an adhesive applicator, referred to generally with the reference character 30, which includes a stationary frame 32 straddling the die train 12.
  • Hot melt adhesive is applied by the adhesive applicator 30 forming an adhesive pattern around 360° of the perimeter of the first plastic packaging component 26, details of which will be given following the completion of a generalized description of the machine.
  • the die train 12 After passing through the applicator Station B, the die train 12 is indexed to Preliminary sealing Station C, along with a cover or second plastic package, component 36, which is fed from the back side web roll 34 of suitable, flexible or semi-rigid plastic material in accordance with the requirement of the package being formed and where contact between package components 26 and 36 is completed around the majority of the perimeter of the adhesive pattern which has been applied to the first plastic package component 26.
  • the package formed between the first plastic package component 26 and cover 36 is moved to evacuation Station D where the package is evacuated and where contact between package components 26 and 36 is completed on the remainder of the perimeter of the adhesive pattern. This completely seals the evacuated package. From there the sealed package is moved to a cutting Station E, where the package is finally cut and trimmed.
  • the adhesive applicator 30 is mounted downstream in the machine direction as far as possible adjacent the second plastic component 36 in position so that the hot melt adhesive will still be hot and molten as the packages enter the sealing station.
  • the adhesive applicator embodying the present invention is well suited for this location because of its compactness and the fact that it is narrow in the machine direction 20.
  • FIGS 3 and 4 which illustrate one form of the adhesive applicator assembly 30 embodied in the present invention
  • two abreast dies 14 are utilized in the die train 12
  • two adhesive guns 40 are positioned on a common mount 38 which is attached to a bar 42.
  • the bar 42 is attached pivotally at either end to a pair of cam followers 44 which travel in a pair of stationary cams 46 attached securely to the frame 32.
  • the stationary cams 46 have a generally square track with rounded corners and center lines which match an adhesive line or path 50 corresponding to an adhesive pattern around 360° of the perimeter of the first plastic package component 26.
  • the cams 46 are so shaped that the bar 46 carrying the adhesive guns 40 are forced to traverse the adhesive track or path 50 when the adhesive applicator assembly 30 is rotated.
  • a pair of vertical shafts 52 carring timing sprockets 54 at their lower ends have the sprockets securely journalled in the frame 32.
  • the timing sprockets 54 are coupled together by a timing belt 56 and are thereby forced to rotate in unison.
  • the vertical shafts 52 carry cross heads 58 at their upper ends. Each cross head has a rod 60 journalled therein which are fixedly attached to blocks 61 containing bearings rotating on the same center line as the cam followers 44.
  • One of the two vertical shafts 52 is driven by a separate drive motor 48 which is illustrated in the separate drive motor of Figures 1-7.
  • the adhesive applicator assembly 30 may alternately be driven by flexible shafts or other convnetional drive means from the parent packaging machine crank shaft drive.
  • the adhesive applicator 30 is driven at a ratio of 1 1/2 to 1 with respect to the drive to the parent packaging machine 10. Accordingly, for each full revolution of the vertical shaft 52, the adhesive guns 40 traverse the periphery of each package laying down an adhesive line 50 being guided thereby by the bar 42 tracing a pattern governed by the track in the cam 46. It will be understood that to lay down the adhesive around the package being formed, each full revolution of the vertical shaft 52 must be accomplished during the dwell portion of the dies 14 of the packaging machine 10 while they are stopped and in position under the applicator guns 40.
  • the two adhesive guns 40 are activated and open during the full rotation of the vertical shafts 52, the two adhesive paths 50 will be applied around the peripheries of the two cavities in the dies 14. In actual practice, it is customary to keep the adhesive guns 40 open during the little more than 360° of rotation in order to provide a slight overlap and insure that there will be no gap in the adhesive lines 50 in the places where the guns 40 start to deposit adhesive as well as where the guns stop depositing the adhesive.
  • the adhesive applicator station B includes the control cabinet 62 as well as an electrical panel assembly 66 which is enclosed by an electrical enclosure assembly 68.
  • a safety gate assembly 64 protects the adhesive applicator 30 in the machine direction.
  • the described apparatus may utilize two different drives for the traverse of the adhesive applicator 30, both of which will be described in relation to 108° vs. 252° timing.
  • a separate motor drive is utilized for driving the adhesive applicator 30 utilizing a variable speed motor 48 coupled by a reduction gear mechanism 70 to one of the timing sprockets 54 driving the timing belt 56.
  • the speed capabilities of the motor 48 are selected so that it is capable of driving the adhesive applicator 30 through 360° plus an overlap angle X during 252° of machine rotation corresponding to the dwell time for the highest speed at which the packaging machine 10 will run. Accordingly, for this predetermined speed of driving the applicator 30, it is only necessary to open the valves of the applicator 30 at the beginning of the dwell time and to close them again at the conclusion of the dwell time.
  • the speed of traverse of the adhesive applicator also can be easily adjusted by simple observation of the adhesive lines 50 for each speed of the packaging machine 10 within its speed range.
  • the motor 48 continuously operates at a uniform speed thereby continuously driving the adhesive applicator 30 at uniform speed regardless of whether the packaging machine 10 is in its index or dwell time mode. This departs significantly from previous approaches where the traversing motion of the adhesive guns was intermittent thereby first requiring the guns to accelerate to a uniform application speed, then to open theguns while traversing 360° plus X overlap degrees at uniform speed, and then decelerate.
  • Such intermittent stopping and starting required expensive and elaborate machinery and controls and also introduced a great deal of vibration limiting the speed of the machine and providing shorter machine life and higher maintenance costs when contrasted with the continuous motion applicator head of the present invention.
  • the intermediate devices for this embodiment are in the form of a pair of movable shutters 70 which may be actuated by a pair of air cylinders 72.
  • the shutters 70 are actuated whenever the adhesive guns 40 are closed.
  • the shutters 70 are mounted on the bar 42 and move with the guns 40.
  • Figure 7 illustrates the shutter 70 in its actuated position covering the nozzle of'the gun 40 to prevent any adhesive from falling on the food being packaged or on areas which may prove troublesome in the final evacuation and sealing of the package.
  • Figure 6 illustrates, in dotted form, the deactivated position of the shutter 70 permitting the adhesive gun 40 to dispense adhesive.
  • the actuation of the gun 40 for dispensing adhesive is timed from the packaging machine 10.
  • the embodiment illustrated in Figures 8 and 11 is similar to the embodiment illustrated in Figures 1-7 except that the continuous drive for the adhesive applicator 30 is directly derived from one of the continuously driven shafts of the packaging machine 10.
  • shaft 74 driven by the packaging machine motor 16 provides the drive for the adhesive applicator 30 with suitable speed reduction as required for driving the vertical shafts 52 controlling the speed of the adhesive applicator 30.
  • the drive of the adhesive applicator 30 may be provided from a shaft corresponding to shaft 32 in US-A-3,061,984 with a ratio which will drive the applicator guns 360° plus X degrees for each 252° dwell time of the packaging machine 10.
  • this ratio would be approximately 522° of the applicator gun for each 360° revolution of the drive of the packaging machine 10.
  • a more convenient ratio exceeding the minimum may be selected which will result in the minimum practical speed of the applicator 30.
  • By increasing the speed ratio slightly to 1 1/2 to 1 (540° to 360°) a sequence of gun 40 positions may be obtained so that the positions repeat themselves every two machine cycles. This repetitive sequence may be used advantageously to correct any adhesive drip inside the packages or inside the seal line which problem has already been discussed in connection with a separate direct drive for the applicator heads.
  • the zig-zag lines at the lower left during one index representing the gun 40 positions presents no danger at all of dripping on a round product, a square product or anywhere inside the seal area.
  • the dotted lines at the lower and upper right hand show that drippage may occur in the extreme right hand corners of a square- product, and a little inside the adhesive seal line 50, but obviously not on a round product. Accordingly, this selected angular relationship minimizes the danger of drippage particularly on a round product.
  • this particular angular relationship is an advantage in evacuation and sealing which will be explained hereinafter in view of the fact that the overlap X always occurs generally perpendicular to the machine direction 20 and never adjacent an evacuation slot which is located between dies 14 in the machine direction 20.
  • the intermediate device consists of a support 80 carrying a shutter 82 which is actuated by an air cylinder 84,and the entire structure can be mounted on the stationary frame 32 in the applicator station B.
  • the shutter 82 only needs to be activated during each alternate cycle and can be mounted directly on the frame of the packaging machine or on the frame of the adhesive applicator.
  • Figure 11 illustrates the shutter 82 activated in position under the adhesive gun 40 preventing dripping on the product when in it activated position.
  • the most widely used type of vacuum packaging machine for uniformly sized products such as sliced luncheon meats, frankfurters and the like, for high speed, high production operation is the die-train type apparatus closely resembling that shown in previsouly mentioned US-A-3,061,984.
  • the most efficient and widely used form of this type of machine uses dies such as shown in Figures 7 and 11, with the packages being formed thereby evacuated through a central confined passageway between the dies using web lifters or sheet separators 90.
  • the web lifters 90 are made to move freely in the passageway between the dies and occupy a lower position when cutting an evacuation slot and an upward position during evacuation for example, as is illustrated in Figures 8 and 11 of the aforesaid patent.
  • the partially sealed areas are reopened so that air from the interior of the two packages may be evacuated and passed out and down the sheet separator openings through which the sheet separators 90 extend.
  • the reopening of the closed portions of the packages by the sheet separator causes stringing of the adhesive to form between the top and bottom webs on either side of the sheet separator providing adhesive legs therebetween.
  • the die train 12 when indexed through the packaging machine 10, is exposed to a holding vacuum applied through a manifold 88 through passageways 92 containing the web lifters or separators 90 and evacuation slots 86 which are in communication with the internal portions of the dies 14 holding the first plastic package components 26. This vacuum holds the first plastic package component 26 in place as they move through the packaging apparatus 10.
  • the adhesive stringing problem is alleviated by keeping the top web cover or second plastic package component 36 from touching the adhesive 50 on the first plastic package component 26 in the critical areas.
  • the web separator 90 bears on the underside of web 36 in the critical area and is spring biased upward by a spring 94 to prevent the top web or second package component 36 from touching the adhesive 50 which has been laid down between the dies 14 in the machine direction near the evacuation slots 86.
  • devices such as latches, friction devices, etc. may be employed for the spring biasing as long as the top web 36 is prevented from touching the adhesive line 50 on the bottom web in the critical central areas where evacuation takes place.
  • a clamp 96 brings the upper web 36 into contact with the lower first package component 26 around the outer peripheries of the two package array to ready the packages for evacuation through passages between the dies 14.
  • Another method of alleviating the adhesive stringing problem is to provide a manifold 98 and to apply therethrough a source of compressed air or inert gas through the lifter passageway 92 in the evacuation slot 86 so that the air or gas pressure serves to cause the top web 36 to tent upward thereby minimizing the adhesive contact of the top web 36 in the critical central area between the dies where evacuation is to take place on the next index of the machine.
  • the package is then evacuated after which a longitudinal sealing bar 100 is lowered between the packages so formed, completing and totally sealing the package.
  • Adhesive stringing and the resultant machine contamination can also be alleviated by minimizing the amount of adhesive used particularly on the seal lines 50 adjacent the evacuation slots 86.
  • Adhesive buildups can be minimzed by avoiding placement of the overlap area X in this area by using a direct drive with a ratio of 1.5 to 1 as explained above so that the overlap region will occur generally perpendicular to the machine direction 20 and never along the machine direction. Accordingly, adhesive buildup will not occur adjacent the evacuation slots in the critical areas.
  • the packaging machine will accommodate an all flexible package made with adhesives as well as such a flexible package in which one component of the package is fabricated by back-forming.
  • the process also will accommodate semi-rigid package materials as well as the combination of semi-rigid and flexible packaging materials in various combinations.
  • a major feature of the methods and apparatus embodied in this invention involves driving an adhesive applicator with a continuous uniform motion which does not require the acceleration, deposit and deceleration cycle normally employed in hot melt adhesive machines of this type.
  • the continuous uniform motion which is applied to the adhesive- applicator may be provided by a separate motor drive or a direct drive utilizing one of the crank shafts of the packaging machine.
  • the applicator assembly is extremely narrow in the machine direction of the packaging machine permitting it to be mounted and the adhesive applied deep into the packaging cycle near the application of the cover, evacuation, and sealing of the package so that the hot melt adhesive does not have to be reheated and activated in order to efficiently seal the package. Methods and apparatus are provided for effectively alleviating any adhesive problem caused in the evacuation process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Package Closures (AREA)
EP85113446A 1984-10-23 1985-10-23 Procédé pour la formation d'un emballage fermé par un adhésif Ceased EP0179454A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US66386684A 1984-10-23 1984-10-23
US663866 1984-10-23

Publications (2)

Publication Number Publication Date
EP0179454A2 true EP0179454A2 (fr) 1986-04-30
EP0179454A3 EP0179454A3 (fr) 1987-08-05

Family

ID=24663559

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113446A Ceased EP0179454A3 (fr) 1984-10-23 1985-10-23 Procédé pour la formation d'un emballage fermé par un adhésif

Country Status (4)

Country Link
EP (1) EP0179454A3 (fr)
JP (1) JPS62500581A (fr)
CA (1) CA1267067A (fr)
WO (1) WO1986002615A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990000496A1 (fr) * 1988-07-13 1990-01-25 Heinz Hermann Weick Diffuseur pour vaporiser des principes actifs a inhaler
WO2003037720A2 (fr) * 2001-10-30 2003-05-08 International Product Technology, Inc. Procede et appareil permettant de coller de maniere etanche une bande de revetement sur une bande support

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112158402B (zh) * 2020-09-23 2022-04-05 辽阳百乐保健品有限公司 一种绝缘硅胶密封装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061984A (en) * 1959-09-25 1962-11-06 Reid A Mahaffy Packaging machine and method
US3472723A (en) * 1964-10-14 1969-10-14 Jerome H Lemelson Container manufacture
US3791590A (en) * 1972-09-27 1974-02-12 Jones & Co Inc R A Drip inhibiting glue nozzle
US4168598A (en) * 1977-03-01 1979-09-25 Omori Machinery Co., Ltd. Vacuum packaging method and apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3524298A (en) * 1969-07-01 1970-08-18 Mahaffy & Harder Eng Co Automatic packaging apparatus
US3722468A (en) * 1971-10-26 1973-03-27 Kimberly Clark Co Transversing mechanism for adhesive application
US3815322A (en) * 1972-05-08 1974-06-11 I Wyslotsky Packaging machine
US3831342A (en) * 1973-01-22 1974-08-27 Pillsbury Co Method and apparatus for forming sift proof glued flap seals for cartons
US4010203A (en) * 1974-03-26 1977-03-01 General Concrete Of Canada Limited Adhesive-applying apparatus
US4058953A (en) * 1976-07-26 1977-11-22 W. R. Grace & Co. Gas flushing or filling packaging machine
JPS5930141B2 (ja) * 1978-04-20 1984-07-25 ソニー株式会社 粘性物質塗布方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061984A (en) * 1959-09-25 1962-11-06 Reid A Mahaffy Packaging machine and method
US3472723A (en) * 1964-10-14 1969-10-14 Jerome H Lemelson Container manufacture
US3791590A (en) * 1972-09-27 1974-02-12 Jones & Co Inc R A Drip inhibiting glue nozzle
US4168598A (en) * 1977-03-01 1979-09-25 Omori Machinery Co., Ltd. Vacuum packaging method and apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990000496A1 (fr) * 1988-07-13 1990-01-25 Heinz Hermann Weick Diffuseur pour vaporiser des principes actifs a inhaler
US4955945A (en) * 1988-07-13 1990-09-11 Weick Heinz Hermann Dispenser for the vaporization of active substances to be inhaled
WO2003037720A2 (fr) * 2001-10-30 2003-05-08 International Product Technology, Inc. Procede et appareil permettant de coller de maniere etanche une bande de revetement sur une bande support
WO2003037720A3 (fr) * 2001-10-30 2003-10-30 Robotic Vision Systems Procede et appareil permettant de coller de maniere etanche une bande de revetement sur une bande support
US6810936B2 (en) 2001-10-30 2004-11-02 International Product Technology, Inc. Method and apparatus for sealing cover tape to carrier tape

Also Published As

Publication number Publication date
CA1267067A (fr) 1990-03-27
EP0179454A3 (fr) 1987-08-05
JPS62500581A (ja) 1987-03-12
WO1986002615A1 (fr) 1986-05-09

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