US20040244338A1 - Device and method for producing and sealing packagings produced from at least one heat sealable packaging material strip - Google Patents
Device and method for producing and sealing packagings produced from at least one heat sealable packaging material strip Download PDFInfo
- Publication number
- US20040244338A1 US20040244338A1 US10/488,894 US48889404A US2004244338A1 US 20040244338 A1 US20040244338 A1 US 20040244338A1 US 48889404 A US48889404 A US 48889404A US 2004244338 A1 US2004244338 A1 US 2004244338A1
- Authority
- US
- United States
- Prior art keywords
- packaging material
- sealing
- flexible tube
- transverse
- bore
- 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.)
- Abandoned
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 74
- 239000005022 packaging material Substances 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 238000004806 packaging method and process Methods 0.000 title 1
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 4
- 238000000034 method Methods 0.000 claims 2
- 238000003825 pressing Methods 0.000 claims 1
- 238000007493 shaping process Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
- B29C65/30—Electrical means
- B29C65/305—Electrical means involving the use of cartridge heaters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
- B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7841—Holding or clamping means for handling purposes
- B29C65/7847—Holding or clamping means for handling purposes using vacuum to hold at least one of the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
- B29C66/133—Fin-type joints, the parts to be joined being flexible
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/346—Making joints having variable thicknesses in the joint area, e.g. by using jaws having an adapted configuration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/431—Joining the articles to themselves
- B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
- B29C66/824—Actuating mechanisms
- B29C66/8242—Pneumatic or hydraulic drives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
- B29C66/826—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined
- B29C66/8266—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using fluid pressure directly acting on the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
- B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
- B29C66/83541—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws flying jaws, e.g. jaws mounted on crank mechanisms or following a hand over hand movement
- B29C66/83543—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws flying jaws, e.g. jaws mounted on crank mechanisms or following a hand over hand movement cooperating flying jaws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/84—Specific machine types or machines suitable for specific applications
- B29C66/849—Packaging machines
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- 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
- B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
- B65B31/04—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied
- B65B31/046—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied the nozzles co-operating, or being combined, with a device for opening or closing the container or wrapper
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- 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
- B65B51/10—Applying or generating heat or pressure or combinations thereof
- B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
- B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
- B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
- B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
- B29C66/81417—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled being V-shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/9241—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power
- B29C66/92441—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power the pressure, the force or the mechanical power being non-constant over time
- B29C66/92443—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power the pressure, the force or the mechanical power being non-constant over time following a pressure-time profile
- B29C66/92445—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power the pressure, the force or the mechanical power being non-constant over time following a pressure-time profile by steps
Definitions
- the invention relates to an apparatus and a method for producing and closing packages, made from at least one hot-sealable web of packaging material, as generically defined by the preambles to the independent claims.
- German Patent Disclosure DE 199 04 154 A1 to embody flexible sealing faces on a transverse seam sealing device, which conform to the packaging material as a function of the varying number of layers of packaging material.
- German Utility Model DE-GM 94 13 035 An embodiment with a similar effect is proposed by German Utility Model DE-GM 94 13 035, in which a silicone inlay is provided in a sealing jaw of a transverse seam sealing device, and this inlay also conforms to the packaging material so as to achieve a better heat transfer.
- the apparatus according to the invention for producing and closing packages made from at least one hot-sealable web of packaging material and having the definitive characteristics of claim 1 has the advantage that with a relatively simple structural embodiment, it makes tight transverse seams and at the same time a high output of the apparatus possible.
- the invention makes use of the thought that for producing tight sealing seams, adequate warming of the packaging material must be assured, particularly in the regions of the transverse seam to be formed that have a reduced number of layers of packaging material. While when the two sealing jaws are pressed together, good heat transfer from the sealing jaws into the packaging material is assured in those regions with an increased number of layers of packaging material solely by the pressure of the sealing jaws, in the regions with a reduced number of layers of packaging material, the heat transfer is reduced in those regions with a reduced number of layers of packaging material, because of the reduced initial pressure of the sealing jaws against the packaging material. It is therefore proposed according to the invention that suction openings be provided in these latter regions, which openings pull the packaging material against the heated sealing jaw and thereby assure a high heat transfer.
- suction openings be made to communicate with a negative-pressure source. This makes it possible to press the layers of packaging material, after they warm up, against one another by means of the overpressure, so that a more-intimate contact between the warmed layers of packaging material and thus a tighter transverse seam can be formed.
- FIG. 1 an apparatus for producing bag packages, in simplified front view
- FIG. 2 a bag package, produced by the apparatus of FIG. 1, in perspective;
- FIG. 3 a section taken in the plane III-III in FIG. 2, to illustrate the different numbers of layers of packaging material
- FIG. 4 a single sealing jaw according to the invention, in a simplified perspective view
- FIG. 5 a simplified section through a transverse seam sealing device of the invention.
- FIG. 6 a section through a portion of the transverse seam sealing device of FIG. 5 during the sealing operation.
- FIG. 1 a tubular bag-making machine 10 , known per se, is shown.
- the tubular bag-making machine 10 has a forming shoulder 11 , which embraces a combined forming and filling tube 12 .
- a hot-sealable web of packaging material 13 which is drawn from a supply roll not shown and is delivered to the forming shoulder 11 via a feed roll 14 , is shaped into a flexible tube 15 .
- Two vacuum prestretching belts 18 which serve to prestretch the flexible tube 15 , are disposed facing one another on the forming and filling tube 12 , below the forming shoulder 11 .
- a longitudinal seam sealing device 20 is also disposed on the front side of the forming and filling tube 12 ; it welds the two peripheral regions of the web 13 of packaging material, placed one above the other by the forming shoulder 11 , into a longitudinal sealing seam 4 .
- a raisable and lowerable transverse seam jaw housing 21 is located below the forming and filling tube 12 and has a folding device, not shown, for the flexible tube 15 as well as a sealing device 22 , which includes two identically embodied heatable sealing jaws 23 , 24 that can be moved toward one another and have an integrated cutting device.
- tubular bag packages 1 By means of the tubular bag-making machine 10 described thus far and known per se, individual tubular bag packages 1 , of the kind shown in FIG. 2, can be made.
- the tubular bag package 1 has a top closure 2 , folded in finlike fashion, with a transverse sealing seam 3 and the longitudinal sealing seam 4 , which extend over the entire front side 5 of the tubular bag package 1 and its top closure 2 as well as over the bottom region, not identified by reference numeral, of the tubular bag package 1 . Because the top closure 2 has been folded with side folds 6 indented in a V and with the longitudinal sealing seam 4 , the top closure 2 has a region 7 in which the packaging material is in two layers and another region 8 in which the packaging material is in four layers (FIG. 3). The likewise transversely sealed bottom region of the tubular bag package 1 also has regions with correspondingly different numbers of layers of packaging material.
- FIG. 4 In FIG. 4, one sealing jaw 23 is shown. It can be seen that the sealing jaw 23 has two sealing regions 26 , 27 ; the upper sealing region 26 serves to form a transverse sealing seam 3 , which is disposed in the bottom region of the tubular bag package 1 , while the lower sealing region 27 serves to form a transverse sealing seam 3 disposed on the top closure 2 of the tubular bag package 1 .
- a cutting knife 28 which cuts the individual tubular bag packages 1 apart from the flexible tube 15 , can also be seen between the two sealing regions 26 , 27 .
- sealing jaw 23 Electrically operated heating cartridges, not shown, are disposed in the sealing jaw 23 and assure that the contact face 29 of the sealing jaw 23 , oriented toward the flexible tube 15 , will upon contact with the flexible tube 15 transmit sufficient heat into the regions of the flexible tube 15 that are to be sealed.
- the sealing jaw 23 is for instance coupled to a pneumatically operated drive mechanism 30 , which is supported in the transverse seam jaw housing 21 , and which assures a motion of the sealing jaw 23 in the direction of the double arrow 31 .
- a plurality of groups of bores 33 which are each coupled with a respective central conduit 34 , 35 inside the sealing jaw 23 , discharge into the contact faces 29 , oriented toward the flexible tube 15 , of the sealing jaws 23 .
- the two conduits 34 , 35 in turn discharge into a combined connection 36 , which can be made to communicate with a negative-pressure source 37 or an overpressure source 38 .
- the coupling of the combined connection 36 to the negative-pressure source 37 or the overpressure source 38 is effected by suitable triggering of valves 41 , 42 by means of the control unit of the tubular bag-making machine 10 .
- An essential feature is the disposition of the bores 33 in the contact faces 29 , which depends on the location and number of the different layers of packaging material, which will now be discussed with reference to FIG. 5. It can be seen from FIG. 5 that the bores 33 are disposed in those regions 7 in which there are only two layers of packaging material in the flexible tube 15 , while no suction bores 33 are disposed in the regions 8 in which there are four layers of packaging material.
- FIGS. 6 and 7 In each case shown enlarged but not to scale, part of the cross section of the tubular bag package 1 is shown as a transverse seam 3 is being formed.
- a transverse seam 3 For forming the transverse sealing seams 3 , it is necessary that the two sealing jaws 23 , 24 be moved toward one another by the drive mechanism 30 , so that the contact faces 29 come into contact with the flexible tube 15 .
- the valve 41 is closed and the valve 42 is opened, so that now the bores 33 communicate with the overpressure source 38 .
- the effect is that the two-layered regions 7 are additionally pressed together with compressed air, along with the sealing pressure applied by the sealing jaws 23 , 24 , in order to assure an especially intimate bond or welding of the flexible tube 15 within the regions 7 .
- sealing jaws 23 , 24 described can be modified in manifold ways without departing from the concept of the invention, which is, in those regions where there is a reduced number of layers of packaging material, to assure a better heat transfer and an increased sealing pressure by using bores that communicate with a negative-pressure source or an overpressure source.
- the bores 33 it is conceivable for the bores 33 to be made to communicate with only a negative-pressure source or only an overpressure source, since both provisions by themselves already mean an improvement in the sealing quality.
- the number or disposition of the bores 33 in the sealing jaws 23 , 24 can also be adapted to a particular intended application.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Thermal Sciences (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
- Package Closures (AREA)
- Closing Of Containers (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
A tubular bag-making machine for forming a flexible tube from a hot-sealable web of packaging material sealed longitudinally by means of a longitudinal seam sealing device and transversely by means of a transverse seam sealing device to produce individual tubular bag packages. To improve the transverse sealing seams, bores which can be made to communicate in alternation with a negative-pressure source or an overpressure source are embodied in the sealing jaws of the transverse seam sealing device in regions having a reduced number of layers of packaging material to enable a good heat transfer and a higher sealing pressure in the region of changes in the number of layers of packaging material of the transverse sealing seams.
Description
- The invention relates to an apparatus and a method for producing and closing packages, made from at least one hot-sealable web of packaging material, as generically defined by the preambles to the independent claims.
- One apparatus having the characteristics of the preamble to claim1 is already known from German Patent Disclosure DE 43 35 577 A1. In producing packages with the known kinds of apparatus, the problem arises that over the cross section of the flexible tube formed, there are regions with varying numbers of layers of packaging material. This can for instance be due to the fact that a previously formed longitudinal seam is wrapped around a wall of the bag, so that in the region of the longitudinal seam there are four layers of packaging material, while in the region immediately next to it there are only two layers of packaging material. It is also usual to fold the web of packaging materials inward in a V in the bottom and top regions, so that in these regions as well, there are four layers of packaging material. The presence of different numbers of layers of packaging material over the cross section of the packages is problematic because in forming the transverse seams, it must be assured that the packages later cut apart from the flexible tube of packaging material have adequate tightness. In conventional transverse seam sealing devices, a relatively high molding pressure and/or a relatively high temperature is typically employed, so that in all regions of the cross section of the flexible tube, sufficient heat and pressure will be transmitted to produce tight transverse seams. There are limits, however, to both transferring suitable quantities of heat and applying suitable sealing pressures, especially when critical packaging materials are used or for the sake of output.
- To overcome these problems, it is therefore known from German Patent Disclosure DE 199 04 154 A1 to embody flexible sealing faces on a transverse seam sealing device, which conform to the packaging material as a function of the varying number of layers of packaging material.
- An embodiment with a similar effect is proposed by German Utility Model DE-GM 94 13 035, in which a silicone inlay is provided in a sealing jaw of a transverse seam sealing device, and this inlay also conforms to the packaging material so as to achieve a better heat transfer.
- The apparatus according to the invention for producing and closing packages made from at least one hot-sealable web of packaging material and having the definitive characteristics of claim1 has the advantage that with a relatively simple structural embodiment, it makes tight transverse seams and at the same time a high output of the apparatus possible.
- The invention makes use of the thought that for producing tight sealing seams, adequate warming of the packaging material must be assured, particularly in the regions of the transverse seam to be formed that have a reduced number of layers of packaging material. While when the two sealing jaws are pressed together, good heat transfer from the sealing jaws into the packaging material is assured in those regions with an increased number of layers of packaging material solely by the pressure of the sealing jaws, in the regions with a reduced number of layers of packaging material, the heat transfer is reduced in those regions with a reduced number of layers of packaging material, because of the reduced initial pressure of the sealing jaws against the packaging material. It is therefore proposed according to the invention that suction openings be provided in these latter regions, which openings pull the packaging material against the heated sealing jaw and thereby assure a high heat transfer.
- Another preferred embodiment of the invention provides that the suction openings be made to communicate with a negative-pressure source. This makes it possible to press the layers of packaging material, after they warm up, against one another by means of the overpressure, so that a more-intimate contact between the warmed layers of packaging material and thus a tighter transverse seam can be formed.
- One exemplary embodiment of the invention is shown in the drawing and will be described in further detail below. Shown are:
- FIG. 1, an apparatus for producing bag packages, in simplified front view;
- FIG. 2, a bag package, produced by the apparatus of FIG. 1, in perspective;
- FIG. 3, a section taken in the plane III-III in FIG. 2, to illustrate the different numbers of layers of packaging material;
- FIG. 4, a single sealing jaw according to the invention, in a simplified perspective view;
- FIG. 5, a simplified section through a transverse seam sealing device of the invention; and
- FIG. 6, a section through a portion of the transverse seam sealing device of FIG. 5 during the sealing operation.
- In FIG. 1, a tubular bag-
making machine 10, known per se, is shown. The tubular bag-making machine 10 has a formingshoulder 11, which embraces a combined forming and fillingtube 12. By means of the formingshoulder 11 and the forming andfilling tube 12, a hot-sealable web ofpackaging material 13, which is drawn from a supply roll not shown and is delivered to the formingshoulder 11 via afeed roll 14, is shaped into aflexible tube 15. - Two
vacuum prestretching belts 18, which serve to prestretch theflexible tube 15, are disposed facing one another on the forming and fillingtube 12, below the formingshoulder 11. At the level of thevacuum prestretching belts 18, a longitudinalseam sealing device 20 is also disposed on the front side of the forming and fillingtube 12; it welds the two peripheral regions of theweb 13 of packaging material, placed one above the other by the formingshoulder 11, into alongitudinal sealing seam 4. - A raisable and lowerable transverse
seam jaw housing 21 is located below the forming andfilling tube 12 and has a folding device, not shown, for theflexible tube 15 as well as asealing device 22, which includes two identically embodiedheatable sealing jaws - By means of the tubular bag-
making machine 10 described thus far and known per se, individual tubular bag packages 1, of the kind shown in FIG. 2, can be made. The tubular bag package 1 has atop closure 2, folded in finlike fashion, with a transverse sealing seam 3 and thelongitudinal sealing seam 4, which extend over the entire front side 5 of the tubular bag package 1 and itstop closure 2 as well as over the bottom region, not identified by reference numeral, of the tubular bag package 1. Because thetop closure 2 has been folded withside folds 6 indented in a V and with thelongitudinal sealing seam 4, thetop closure 2 has aregion 7 in which the packaging material is in two layers and anotherregion 8 in which the packaging material is in four layers (FIG. 3). The likewise transversely sealed bottom region of the tubular bag package 1 also has regions with correspondingly different numbers of layers of packaging material. - The
sealing jaws sealing jaw 23 is shown. It can be seen that thesealing jaw 23 has twosealing regions upper sealing region 26 serves to form a transverse sealing seam 3, which is disposed in the bottom region of the tubular bag package 1, while thelower sealing region 27 serves to form a transverse sealing seam 3 disposed on thetop closure 2 of the tubular bag package 1. Acutting knife 28, which cuts the individual tubular bag packages 1 apart from theflexible tube 15, can also be seen between the twosealing regions - Electrically operated heating cartridges, not shown, are disposed in the sealing
jaw 23 and assure that thecontact face 29 of thesealing jaw 23, oriented toward theflexible tube 15, will upon contact with theflexible tube 15 transmit sufficient heat into the regions of theflexible tube 15 that are to be sealed. For putting thesealing jaw 23 into contact with theflexible tube 15, thesealing jaw 23 is for instance coupled to a pneumatically operateddrive mechanism 30, which is supported in the transverseseam jaw housing 21, and which assures a motion of the sealingjaw 23 in the direction of thedouble arrow 31. - A plurality of groups of
bores 33, which are each coupled with a respectivecentral conduit jaw 23, discharge into thecontact faces 29, oriented toward theflexible tube 15, of thesealing jaws 23. The twoconduits connection 36, which can be made to communicate with a negative-pressure source 37 or anoverpressure source 38. The coupling of the combinedconnection 36 to the negative-pressure source 37 or theoverpressure source 38 is effected by suitable triggering ofvalves making machine 10. - An essential feature is the disposition of the
bores 33 in thecontact faces 29, which depends on the location and number of the different layers of packaging material, which will now be discussed with reference to FIG. 5. It can be seen from FIG. 5 that thebores 33 are disposed in thoseregions 7 in which there are only two layers of packaging material in theflexible tube 15, while nosuction bores 33 are disposed in theregions 8 in which there are four layers of packaging material. - The function of the
sealing device 22 and thesealing jaws jaws drive mechanism 30, so that the contact faces 29 come into contact with theflexible tube 15. Since because theflexible tube 15 is in four layers in theregions 8 thesealing jaws flexible tube 15 until in theregions 8, a greater quantity of heat is also first, and because of the greater pressure, transmitted from the contact faces 29 into theflexible tube 15 in theregions 8. To compensate for this effect, when thesealing jaws flexible tube 15, the negative-pressure source 37 is made to communicate operatively with thebores 33 via the onevalve 41, so that via thebores 33, theflexible tube 15 in the two-layered regions 7 is drawn against the corresponding contact faces 29 (FIG. 6). Thus in the two-layered regions 7 of theflexible tube 15 as well, a good, that is enhanced, heat transfer from the contact faces 29 into theflexible tube 15 is assured. - After a certain period of time, the
valve 41 is closed and thevalve 42 is opened, so that now thebores 33 communicate with theoverpressure source 38. The effect is that the two-layered regions 7 are additionally pressed together with compressed air, along with the sealing pressure applied by the sealingjaws flexible tube 15 within theregions 7. In other words, this means that the overpressure generates an additional pressure on theregions 7, so that the pressure in theregions 7 is as equal as possible as the pressure generated solely by the sealingjaws - The entire welding operation, that is, the forming of the transverse sealing seams3, takes place while the two sealing
jaws jaws - It will additionally be noted that the sealing
jaws bores 33 to be made to communicate with only a negative-pressure source or only an overpressure source, since both provisions by themselves already mean an improvement in the sealing quality. The number or disposition of thebores 33 in the sealingjaws
Claims (5)
1-4. (canceled)
5. An apparatus (10) for producing and closing packages (1), made from at least one hot-sealable web of packaging material (13), the apparatus comprising
a flexible-tube-forming device (11, 12) for forming a flexible tube (15) from the at least one flat web (13) of packaging material),
a longitudinal seam sealing device (20) for forming a longitudinal seam (4) in the region of overlapping portions of the at least one web (13) of packaging material),
a transverse seam sealing device (22), which includes two heatable sealing jaws (23, 24) that can be moved counter to one another in order to divide the flexible tube (15) into individual portions, defined by transverse seams (3), for the ensuing cutting apart of packages (1),
at least one bore (33) in at least one of the sealing jaws (23, 24), on the side toward the flexible tube (15),
a negative-pressure source (37); and
means establishing communication between the at least one bore and the negative pressure source,
the at least one bore (33) being disposed in a region (7) of the cross section of the transverse seam (3) to be formed, which region has a reduced number of layers of packaging material compared to other regions (8).
6. The apparatus of claim 5 , further comprising an over pressure source, and means establishing communication between the at least one bore (33) not only with the negative-pressure source (37) but in addition and in alternation with the overpressure source (38).
7. A method for producing and closing packages (1) made from at least one hot-sealable web of packaging material (13), by means of an apparatus (10) defined by claim 4, the method comprising the steps of first shaping a flexible tube (15) from the at least one web (13) of packaging material, forming a longitudinal seam (4) and transverse seams (3) in the flexible tube, the transverse seams (3) separating the packages (1) from one another, the forming of the transverse seams (3) being effected by pressing together a sealing device (22) that includes the heatable sealing jaws (23, 24) to apply a pressure to the flexible tube (15) therebetween, establishing communication between the negative-pressure source (37) and the at least one bore (33) tp generate a negative pressure in at least one bore (33) of one sealing jaw (23, 24), to thereby press one region (7) of the flexible tube (15) in contact with the corresponding sealing jaw (23, 24), which region (7) has a cross section having a reduced number of layers of packaging material compared to other regions (8).
8. The method defined in claim 7 , further comprising the steps of providing an overpressure source (38), and establishing communication between the at least one bore (33) with not only the negative pressure source (37) but also and in alternation with the overpressure source (38).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10149136.0 | 2001-10-05 | ||
DE10149136A DE10149136A1 (en) | 2001-10-05 | 2001-10-05 | Machine for forming and heat-sealing bags from plastic sheet has sealing jaws with bores on its inner surface connected to vacuum pump and positioned opposite sections of bag with fewest layers |
PCT/DE2002/003769 WO2003031269A1 (en) | 2001-10-05 | 2002-10-04 | Device and method for producing and sealing packagings produced from at least one heat sealable packaging material strip |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040244338A1 true US20040244338A1 (en) | 2004-12-09 |
Family
ID=7701485
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/488,894 Abandoned US20040244338A1 (en) | 2001-10-05 | 2002-10-04 | Device and method for producing and sealing packagings produced from at least one heat sealable packaging material strip |
Country Status (6)
Country | Link |
---|---|
US (1) | US20040244338A1 (en) |
EP (1) | EP1436201B1 (en) |
JP (1) | JP2005519813A (en) |
AT (1) | ATE294104T1 (en) |
DE (2) | DE10149136A1 (en) |
WO (1) | WO2003031269A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160051097A1 (en) * | 2014-08-25 | 2016-02-25 | II Joe Thomas Farris | Methods for Sewing T-Pocket Towels |
US20170096248A1 (en) * | 2014-05-19 | 2017-04-06 | Clear Lam Packaging, Inc. | Apparatus and Method for Making a Flexible Package |
US9877592B2 (en) * | 2014-08-25 | 2018-01-30 | Joe Thomas Farris | T-pocket towels |
US11203163B2 (en) * | 2017-03-02 | 2021-12-21 | ScaldoPack SA | Apparatus and method for producing a sealed connection |
US11649082B2 (en) | 2020-06-18 | 2023-05-16 | Multiv Ac Sepp Haggenmueller Se & Co. Kg | Sealing supported by pressurized air |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104058125A (en) * | 2013-11-30 | 2014-09-24 | 南通宝田包装科技有限公司 | Packaging bag vacuumizing and sealing machine |
CN107187638B (en) * | 2017-06-13 | 2023-06-09 | 中山市小榄镇丰兴包装机械厂 | Control method of vacuum system of vacuum packaging machine |
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- 2001-10-05 DE DE10149136A patent/DE10149136A1/en not_active Withdrawn
-
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- 2002-10-04 DE DE50202944T patent/DE50202944D1/en not_active Expired - Fee Related
- 2002-10-04 US US10/488,894 patent/US20040244338A1/en not_active Abandoned
- 2002-10-04 AT AT02781127T patent/ATE294104T1/en not_active IP Right Cessation
- 2002-10-04 EP EP02781127A patent/EP1436201B1/en not_active Expired - Lifetime
- 2002-10-04 WO PCT/DE2002/003769 patent/WO2003031269A1/en active IP Right Grant
- 2002-10-04 JP JP2003534266A patent/JP2005519813A/en not_active Abandoned
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US20170096248A1 (en) * | 2014-05-19 | 2017-04-06 | Clear Lam Packaging, Inc. | Apparatus and Method for Making a Flexible Package |
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US11203163B2 (en) * | 2017-03-02 | 2021-12-21 | ScaldoPack SA | Apparatus and method for producing a sealed connection |
US11649082B2 (en) | 2020-06-18 | 2023-05-16 | Multiv Ac Sepp Haggenmueller Se & Co. Kg | Sealing supported by pressurized air |
Also Published As
Publication number | Publication date |
---|---|
DE50202944D1 (en) | 2005-06-02 |
EP1436201A1 (en) | 2004-07-14 |
EP1436201B1 (en) | 2005-04-27 |
DE10149136A1 (en) | 2003-04-17 |
JP2005519813A (en) | 2005-07-07 |
ATE294104T1 (en) | 2005-05-15 |
WO2003031269A1 (en) | 2003-04-17 |
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Legal Events
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AS | Assignment |
Owner name: ROBERT BOSCH GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NIEVERGELD, HANS;REEL/FRAME:014443/0948 Effective date: 20031128 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |