AU2016247079B2 - Form-fill-seal machine - Google Patents

Form-fill-seal machine Download PDF

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Publication number
AU2016247079B2
AU2016247079B2 AU2016247079A AU2016247079A AU2016247079B2 AU 2016247079 B2 AU2016247079 B2 AU 2016247079B2 AU 2016247079 A AU2016247079 A AU 2016247079A AU 2016247079 A AU2016247079 A AU 2016247079A AU 2016247079 B2 AU2016247079 B2 AU 2016247079B2
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Australia
Prior art keywords
punch
cylindrical
sealing
oct
cutting part
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AU2016247079A1 (en
Inventor
Toshikazu Shotsu
Takahiro Yasuda
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Ishida Co Ltd
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Ishida Co Ltd
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Classifications

    • 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
    • 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
    • B29C65/74—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
    • B29C65/745—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 a single unit having both a severing tool and a welding tool
    • B29C65/7451—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 a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • 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
    • B29C65/745—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 a single unit having both a severing tool and a welding tool
    • B29C65/7457—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 a single unit having both a severing tool and a welding tool comprising a perforating tool
    • 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
    • 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
    • B29C66/81421—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 convex or concave
    • B29C66/81422—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 convex or concave being convex
    • 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
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • B29C66/83513—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums cooperating jaws mounted on rollers, cylinders or drums and moving in a closed path
    • 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
    • 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
    • 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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Details Of Cutting Devices (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Package Closures (AREA)

Abstract

An object of the present invention is to provide a form-fill-seal machine that can efficiently open a punch hole in a sealed portion of a packaging material. The form-fill-seal machine fills and hermetically seals package contents in a tube-shaped packaging material. The form-fill-seal machine includes a transverse sealing mechanism and a punch mechanism. The transverse sealing mechanism sandwiches a packaging material using a pair of sealing members disposed on left and right sides of the packaging material, and seals the packaging material in the transverse direction. The punch mechanism has a cylindrical punch for opening a punch hole in the transversely sealed portion that has been sealed by the transverse sealing mechanism. The cylindrical punch has a cutting part for cutting the transversely sealed portion and opening a punch hole. A cutting part side-surface shape, which is the shape of the cutting part seen from a direction orthogonal to both the longitudinal direction of the cylindrical punch and the vertical direction, has a protruding part that protrudes in the longitudinal direction of the cylindrical punch.

Description

The present invention relates to a form-fill-seal machine for filling and hermetically sealing package contents in a tube-shaped packaging material.
BACKGROUND ART [0003] In the past, there have been used form-fill-seal machines in which a food product or other package contents are filled into bags while the bags are formed, and the food product is sealed and hermetically packaged in the bags. In these form-fill-seal machines, a packaging material, which is a sheet-form film, is molded into a cylindrical (tube-shaped) by a former and a tube, and overlapping longitudinal edges of the tube-shaped packaging material are sealed. The package contents are then filled into the tube-shaped packaging material, the upper and lower parts of the bag are heat-sealed in the transverse direction by a heat-sealing mechanism, and the centers of the sealed portions are cut by a cutter.
[0004] Form-fill-seal machines that have a punching mechanism for opening punch holes in the sealed portions have also been used in the past. An example of a punching mechanism is the heat-type punching mechanism disclosed in Patent Literature 1 (Japanese Laid-open Patent Application No. 2006-36246), in which the film is cut while being heated to open punch holes. In this heat-type punching mechanism, inside the punch is provided a heater for heating the film in order to make the film easier to cut.
[0005] However, in order to efficiently open punch holes in the sealed portions of a packaging material that is thicker than normal in a heat-type punching mechanism, the output of the heater must be higher than normal. However, when the output of the heater is increased, there is a risk that the film around the punch holes will melt, adversely affecting the appearance of the bag, or reducing the service life of the heater. There is also a risk that when, instead of increasing the output of the heater, the position of the punch is changed so
2016247079 20 Apr 2018 that the punch pushes more forcefully into the film, the punch will come into contact with members other than the film and degrade. A demand is accordingly presented in heat-sealing mechanisms for a feature whereby heater output is improved and punch holes are efficiently opened in the sealed portions without changing the position of the punch.
[0006] It is desirable to provide a form-fill-seal machine that can efficiently open punch holes in sealed portions of a packaging material.
[0007] A reference herein to a patent document or other matter which is given as prior art is not to be taken as an admission that that document or matter was known or that the information it contains was part of the common general knowledge as at the priority date of any of the claims.
SUMMARY OF THE INVENTION [0008] According to the present invention there is provided a form-fill-seal machine for filling and hermetically sealing package contents in a tube-shaped packaging material, the form-fill-seal machine including: a transverse sealing mechanism for sandwiching the packaging material using a pair of sealing members disposed on left and right sides of the packaging material and sealing the packaging material in a transverse direction, and having a first rotating body and a second rotating body; and a punch mechanism having a cylindrical punch for opening a punch hole in a transversely sealed portion that has been sealed by the transverse sealing mechanism, and a punch-receiving pin for receiving the cylindrical punch; the cylindrical punch having a cutting part for cutting the transversely sealed portion to open the punch hole; and a cutting part side-surface shape, which is a shape of the cutting part seen from a direction orthogonal to both a longitudinal direction of the cylindrical punch and a vertical direction, having a protruding part that protrudes past an imaginary straight line joining an upper end and a lower end of an end part of the cutting part side-surface shape in the longitudinal direction, the first and second rotating bodies rotating synchronously in opposite directions of each other when seen along rotating shafts of the first and second rotating bodies, the cylindrical punch being built into one of the pair of sealing members supported by the second rotating body, the punch-receiving pin being built into the other of the pair of sealing members supported by the first rotating body, the pair of sealing members having sealing surfaces that have substantially arcuate shapes when seen along the rotating shafts.
2016247079 20 Apr 2018 [0009] This form-fill-seal machine includes the cylindrical punch for opening a punch hole in the transversely sealed portion of the packaging material. The cutting part of the cylindrical punch has a shape that has the protruding part as viewed from the side. When the cutting part opens a punch hole in the transversely sealed portion of the packaging material, the portion corresponding to the protruding part first comes into contact with the packaging material and cuts the packaging material. Beginning with the location cut by the portion corresponding to the protruding part, the cutting part can then smoothly cut the packaging material into the shape of a punch hole. The cylindrical punch can thereby smoothly open a
2a
2016247079 18 Dec 2017 punch hole in the transversely sealed portion of the packaging material. Therefore, the formfill-seal machine can efficiently open a punch hole in the sealed portion of the packaging material.
[0010] In this form-fill-seal machine, the cutting part of the cylindrical punch has a shape that has the protruding part as viewed from the side. Therefore, the form-fill-seal machine can efficiently open a punch hole in the sealed portion of the packaging material.
[0011] The cutting part side-surface shape also preferably has a shape such that a line segment joining a distal end and the upper end and a line segment joining the distal end and the lower end are straight lines. The distal end is the longitudinal-direction distal end of the protruding part. The upper end and the lower end are, respectively, the upper end and the lower end at the longitudinal-direction end part of the cutting part side-surface shape.
[0012] In this form-fill-seal machine, the cutting part of the cylindrical punch has a shape in which the distal end is sharp as viewed from the side. It is thereby possible for the portion corresponding to the protruding part to smoothly cut the packaging material when the cutting part opens a punch hole in the transversely sealed portion of the packaging material. Therefore, the form-fill-seal machine can efficiently open a punch hole in the sealed portion of the packaging material.
[0013] The cutting part side-surface shape also preferably has a shape such that the upper end protrudes past the lower end, and the upper end does not protrude past the distal end. The distal end is the distal end of the protruding part in the longitudinal direction. The upper end and the lower end are, respectively, the upper end and the lower end at the end part of the cutting part side-surface shape in the longitudinal direction.
[0014] In this form-fill-seal machine, the upper end of the cutting part of the cylindrical punch protrudes past the lower end as viewed from the side. Depending on the operation of the transverse sealing mechanism, the lower end of the cutting part readily comes into contact with the member into which the cylindrical punch is inserted. However, the lower end of the cutting part is made not to protrude past the upper end, and therefore the cutting part can be kept from coming into contact with members other than the packaging material. Therefore, this form-fill-seal machine can minimize degradation of the cylindrical punch.
[0015] The cylindrical punch also preferably has a recessed part formed in a lower part of the cutting part.
2016247079 19 Oct 2016 [0016] This form-fill-seal machine can cut the transversely sealed portion so that even after a punch hole has been opened in the transversely sealed portion by the cylindrical punch, the punch-hole-shaped cut piece of the packaging material is joined to the transversely sealed portion of the packaging material. The punch-hole-shaped cut piece of the packaging material is thereby kept from falling and scattering. Therefore, this form-fill-seal machine can efficiently open a punch hole in the sealed portion of the packaging material because there is no need to recover a cut piece of the packaging material.
<Advantageous Effects of Invention>
[0017] The form-fill-seal machine according to the present invention can efficiently open a punch hole in a sealed portion of a packaging material.
BRIEF DESCRIPTION OF THE DRAWINGS [0018] FIG. 1 is a perspective view of a form-fill-seal as an embodiment of the present invention;
[0019] FIG. 2 is a perspective view showing a simplified configuration of a form-fill-seal unit;
[0020] FIG. 3 is a simplified side view, as seen from the right side of FIG. 2, of a transverse sealing mechanism;
[0021] FIG. 4 is a side view, as seen from the right side in FIG. 2, of the trajectories of the sealing jaws of the transverse sealing mechanism;
[0022] FIG. 5 is a cross-sectional view, as seen from the right side of FIG. 2, of a pair of first sealing jaws;
[0023] FIG. 6 is an external view of a cylindrical punch;
[0024] FIG. 7 is a side view of the cylindrical punch as seen along the left-right direction;
[0025] FIG. 8 is a drawing representing the transversely sealed portion of the cylindrical film after being cut by the cylindrical punch;
[0026] FIG. 9 is an external view of a punch-receiving pin;
2016247079 19 Oct 2016 [0027] FIG. 10 is a side view of the punch-receiving pin as seen along the left-right direction;
[0028] FIG. 11 is a cross-sectional view, as seen from the right side of FIG. 2, of the pair of first sealing jaws when the cylindrical film is sandwiched between the first sealing jaws;
[0029] FIG. 12 is a cross-sectional view of a comparative example of a pair of sealing jaws including a cylindrical punch;
[0030] FIG. 13 is a side view of a cylindrical punch according to Modification A as seen along the left-right direction; and [0031] FIG. 14 is a side view of a cylindrical punch according to Modification B as seen along the left-right direction.
DESCRIPTION OF EMBODIMENTS [0032] The embodiment of the present invention will be described while referring to the drawings. The embodiment described below is one specific example of the present invention, and is not intended to limit the technical scope of the present invention.
[0033] (1) Configuration of form-fill-seal machine [0034] FIG. 1 is a perspective view of a form-fill-seal machine 1 as one embodiment of the present invention. The form-fill-seal machine 1 is a machine for bagging a food product or other package contents. The form-fill-seal machine 1 is configured mainly from a combination weighing unit 2, a form-fill-seal unit 3, and film supply unit 4.
[0035] The combination weighing unit 2 is arranged above the form-fill-seal unit 3. The combination weighing unit 2 weighs out into a plurality of weighing hoppers the weight of package contents, and combines the weights measured in each of the weighing hoppers, to reach a prescribed total weight. The combination weighing unit 2 then discharges the package contents, in the prescribed combined total weight, downward to supply the contents to the form-fill-seal unit 3.
[0036] At timing coincident with supply of the package contents from the combination weighing unit 2, the form-fill-seal unit 3 places the package contents into the bags, and seals the bags. The details of the configuration and operation of the form-fill-seal unit will be described below.
2016247079 19 Oct 2016 [0037] The film supply unit 4 is arranged adjacent to the form-fill-seal unit 3, and supplies the form-fill-seal unit 3 with packaging film for forming into bags. A film roll onto which the film is wound is installed in the film supply unit 4. The film is reeled out from the film roll by the film supply unit 4.
[0038] The form-fill-seal machine 1 includes an operation switch 5 and a liquid crystal display 6. The operation switch 5 and the liquid crystal display 6 are attached to the front surface of the main body of the form-fill-seal machine 1. The liquid crystal display 6 is a touch panel display arranged at a location visible to the operator of the operation switch 5. The operation switch 5 and the liquid crystal display 6 function as input devices for receiving commands to the form-fill-seal machine 1, and settings relating to the form-fill-seal machine 1. The liquid crystal display 6 also functions as an output device for displaying information relating to the form-fill-seal machine 1.
[0039] The form-fill-seal machine 1 includes a control unit (not shown). The control unit is a computer configured from a CPU, ROM, RAM, and the like. The control unit is connected to the combination weighing unit 2, the form-fill-seal unit 3, the film supply unit 4, the operation switch 5, and the liquid crystal display 6. On the basis of input from the operation switch 5 and the liquid crystal display 6, the control unit controls the combination weighing unit 2, the form-fill-seal unit 3, and the film supply unit 4, and outputs information of various kinds to the liquid crystal display 6.
[0040] (2) Configuration of form-fill-seal unit [0041] FIG 2. is a perspective view showing a simplified configuration of the form-fill-seal unit 3. In the description below, the six directions front (front surface), back (back surface), up, down, left, and right are defined as shown in FIG 2.
[0042] The form-fill-seal unit 3 is configured mainly from a shaping mechanism 13, a pulldown belt mechanism 14, a longitudinal sealing mechanism 15, a transverse sealing mechanism 17, and a punch mechanism 19. The shaping mechanism 13 shapes a sheet-form film F, conveyed thereto from the film supply unit 4, into a tube shape. The pull-down belt mechanism 14 conveys the tube-shaped film F downward. The longitudinal sealing mechanism 15 seals, in a longitudinal direction parallel to the conveying direction, portions where both edges of the tube-shaped film F overlap, and forms a cylindrical film Fc. The transverse sealing mechanism 17 seals the cylindrical film Fc in a transverse direction
2016247079 19 Oct 2016 orthogonal to the conveying direction, forming bags B, which are sealed in the transverse direction at their top edge portion and bottom edge portion.
[0043] (2-1) Shaping mechanism [0044] The shaping mechanism 13 has a tube 13a and a former 13b. The tube 13a is a round cylindrical member open at the top end and the bottom end. Package contents C supplied from the combination weighing unit 2 are charged into the opening at the top end of the tube 13 a. The former 13b is arranged so as to encircle the tube 13 a. As the film F reeled out from the film roll of the film supply unit 4 passes through a gap between the tube 13a and the former 13b, the film wraps about the tube 13a to form a tube shape. The tube 13a and the former 13b can be swapped out according to the size of the bags B being manufactured.
[0045] (2-2) Pull-down belt mechanism [0046] The pull-down belt mechanism 14 conveys downward the film F, which has wrapped about the tube 13a, while holding the film by suction. The pull-down belt mechanism 14 has mainly a drive roller 14a, a driven roller 14b, and a pair of belts 14c. The pair of belts 14c are arranged so as to sandwich the tube 13a on the left and right sides of the tube 13a as shown in FIG. 2, and have a mechanism for holding the cylindrically shaped film F under suction. The pull-down belt mechanism 14 conveys the cylindrically shaped film F downward, due to the pair of belts 14c being rotatably driven by the drive roller 14a and the driven roller 14b.
[0047] (2-3) Longitudinal sealing mechanism [0048] The longitudinal sealing mechanism 15 seals the tube-shaped film F in the longitudinal direction (the up-down direction in FIG. 2). The longitudinal sealing mechanism 15 is arranged on the front surface side of the tube 13a. A drive mechanism (not illustrated) moves the longitudinal sealing mechanism 15 in the forward-backward direction so as to approach or move away from the tube 13 a.
[0049] By driving the longitudinal sealing mechanism 15 closer to the tube 13a using the drive mechanism, longitudinal-direction overlapping portions of the film F wrapped about the tube 13a are sandwiched between the longitudinal sealing mechanism 15 and the tube 13a. The longitudinal sealing mechanism 15 heats the overlapping portions of the film F while pressing against the tube 13a under fixed pressure by the drive mechanism, to heat-seal the 7
2016247079 19 Oct 2016 overlapping portions of the film F in the longitudinal direction and form a cylindrical film Fc. The longitudinal sealing mechanism 15 has a heater for heating the overlapping portions of the film F, a heater belt that contacts the overlapping portions of the film F, and the like.
[0050] (2-4) Transverse sealing mechanism [0051] The transverse sealing mechanism 17 seals the cylindrical film Fc in the transverse direction (the left-right direction in FIG. 2). The transverse sealing mechanism 17 is arranged below the shaping mechanism 13, the pull-down belt mechanism 14, and the longitudinal sealing mechanism 15. FIG. 3 is a simplified side view of the transverse sealing mechanism 17 as seen from the right side of FIG. 2. The direction perpendicular to the page of the drawing in FIG. 3 is the left-right direction in FIG. 2.
[0052] Using a pair of first sealing jaws 51a, 51b or a pair of second sealing jaws 52a, 52b, the transverse sealing mechanism 17 sandwiches the downward-conveyed cylindrical film Fc along the transverse direction (the left-right direction in FIG. 2) intersecting the direction in which the cylindrical film Fc is conveyed, and heat-seals the film in the transverse direction. When the transverse sealing mechanism 17 is seen along the left-right direction, the pair of first sealing jaws 51a, 51b rotate synchronously in opposite directions from each other, and the pair of second sealing jaws 52a, 52b rotate synchronously in opposite directions from each other.
[0053] FIG. 4 is a side view, as seen from the right side in FIG. 2, of the trajectories of the pair of first sealing jaws 51a, 51b and the pair of second sealing jaws 52a, 52b of the transverse sealing mechanism 17. FIG. 4 shows the cylindrical film Fc sandwiched by the pair of first sealing jaws 51a, 51b. FIG. 5 is a cross-sectional view of the pair of first sealing jaws 51a, 51b as seen from the right side of FIG. 2. FIG. 5 is a drawing of the pair of first sealing jaws 51a, 51b sectioned through a surface including the forward-backward direction and the up-down direction, in the middle of the pair of first sealing jaws 51a, 51b in the leftright direction.
[0054] The transverse sealing mechanism 17 includes mainly a first rotating body 50a and a second rotating body 50b. The first rotating body 50a is arranged on the front side of the cylindrical film Fc. The second rotating body 50b is arranged on the rear side of the cylindrical film Fc. In the page of the drawing of FIG. 3, the first rotating body 50a is positioned on the left side of the cylindrical film Fc, and the second rotating body 50b is
2016247079 19 Oct 2016 positioned on the right side of the cylindrical film Fc.
[0055] (2-4-1) First rotating body [0056] The first rotating body 50a includes mainly a first rotating shaft 53a, a pair of first levers 54a, a pair of second levers 55a, a first sealing jaw 51a, and a second sealing jaw 52a.
[0057] The first rotating shaft 53a is a rotating shaft of the first rotating body 50a, extending in the left-right direction. With the first rotating shaft 53a as a rotating shaft, the first rotating body 50a rotates about a rotational center Cl of the first rotating shaft 53a, as seen along the left-right direction. The direction in which the first rotating body 50a rotates is shown by a dashed-line arrow in FIGS. 3 and 4.
[0058] The pair of first levers 54a are connected respectively to the longitudinal (left-right direction) ends of the first rotating shaft 53a. The pair of first levers 54a extend parallel to each other from the first rotating shaft 53 a, along the radial direction of the first rotating shaft 53a.
[0059] The pair of second levers 55a are connected respectively to the longitudinal (left-right direction) ends of the first rotating shaft 53a. The pair of second levers 55a extend parallel to each other from the first rotating shaft 53 a, along the radial direction of the first rotating shaft 53a.
[0060] The first lever 54a and the second lever 55a connected to the right-side end of the first rotating shaft 53a extend in point symmetry relative to the rotational center Cl of the first rotating body 50a when seen along the left-right direction, as shown in FIG. 3. The first lever 54a and the second lever 55a connected to the left-side end of the first rotating shaft 53a also extend in point symmetry relative to the rotational center Cl of the first rotating body 50a when seen along the left-right direction. Specifically, the first levers 54a and the second levers 55a extend in opposite directions from each other relative to the rotational center Cl when seen along the left-right direction.
[0061] The first sealing jaw 51a functions as a pair with the first sealing jaw 51b of the second rotating body 50b. The first sealing jaw 51a has a first sealing surface 511a of which the left-right direction is the longitudinal direction. The cylindrical film Fc is heat-sealed while sandwiched by the pair of first sealing jaws 51a, 51b. The first sealing surface 511a is a surface that contacts the cylindrical film Fc sandwiched by the pair of first sealing jaws 51a, 9
2016247079 19 Oct 2016
51b.
[0062] The longitudinal (left-right direction) ends of the first sealing jaw 51a are connected respectively to the ends of the pair of first levers 54a extending from the first rotating shaft 53a. The first levers 54a are connected to the first rotating shaft 53a. Therefore, the first sealing jaw 51a is supported, through the pair of first levers 54a, at both longitudinal ends by the first rotating shaft 53 a.
[0063] The second sealing jaw 52a functions as a pair with the second sealing jaw 52b of the second rotating body 50b. The second sealing jaw 52a has a second sealing surface 512a of which the left-right direction is the longitudinal direction. The cylindrical film Fc is heatsealed while sandwiched by the pair of second sealing jaws 52a, 52b. The second sealing surface 512a is a surface that contacts the cylindrical film Fc sandwiched by the pair of second sealing jaws 52a, 52b.
[0064] The second sealing jaw 52a is connected at the longitudinal (left-right direction) ends respectively to the ends of the pair of second levers 55a extending from the first rotating shaft 53a. The second levers 55a are connected to the first rotating shaft 53a. Therefore, the second sealing jaw 52a is supported at both longitudinal ends by the first rotating shaft 53a, via the pair of second levers 55a.
[0065] The first levers 54a and the second levers 55a extend in opposite directions from each other relative to the rotational center Cl, when seen along the left-right direction. Therefore, the first sealing jaw 51a and the second sealing jaw 52a, when seen along the left-right direction, are arranged as being positioned 180° apart from each other about the rotational center Cl.
[0066] Heaters (not shown) are built into the first sealing jaw 51a and the second sealing jaw 52a. These heaters heat the first sealing surface 511a and the second sealing surface 512a. The cylindrical film Fc is heat-sealed by coming into contact with the heated first sealing surface 511a and second sealing surface 512a and melting.
[0067] Cutters 56 are built into the first sealing jaw 51a and the second sealing jaw 52a, as shown in FIG. 5. Each cutter 56 is accommodated within a cutter accommodation groove
56a. The cutter accommodation grooves 56a are formed along the longitudinal direction in the first sealing surface 511b and the second sealing surface 512b. The distal ends of the
2016247079 19 Oct 2016 cutters 56 can move in and out of the cutter accommodation grooves 56a along a direction orthogonal to the first sealing surface 511b and the second sealing surface 512b. The first sealing jaw 51a and the second sealing jaw 52a each have an air cylinder or another drive mechanism for moving the cutters 56 in and out of the cutter accommodation grooves 56a. The cutters 56 are used in order to cut, in the transverse direction, the portions of the cylindrical film Fc that have already been transversely sealed, as will be described below.
[0068] (2-4-2) Second rotating body [0069] The second rotating body 50b includes mainly the second rotating shaft 53b, the pair of first levers 54b, a pair of second levers 55b, a first sealing jaw 51b, and a second sealing jaw 52b.
[0070] The second rotating shaft 53b is a rotating shaft of the second rotating body 50b, which extends in the left-right direction. With the second rotating shaft 53b as a rotating shaft, the second rotating body 50b rotates about a rotational center C2 of the second rotating shaft 53b, as seen along the left-right direction. The rotating direction of the second rotating body 50b is shown by a dashed-line arrow in FIGS. 3 and 4.
[0071] The pair of first levers 54b are connected respectively to the longitudinal (left-right direction) ends of the second rotating shaft 53b. The pair of first levers 54b extend parallel to each other from the second rotating shaft 53b, along the radial direction of the second rotating shaft 53b.
[0072] The pair of second levers 55b are connected respectively to the longitudinal (left-right direction) ends of the second rotating shaft 53b. The pair of second levers 55b extend parallel to each other from the second rotating shaft 53b, along the radial direction of the second rotating shaft 53b.
[0073] The first lever 54b and the second lever 55b connected to the right-side end of the second rotating shaft 53b extend in point symmetry relative to the rotational center C2 of the second rotating body 50b when seen along the left-right direction, as shown in FIG. 3. The first lever 54b and the second lever 55b connected to the left-side end of the second rotating shaft 53b also extend in point symmetry relative to the rotational center C2 of the second rotating body 50b when seen along the left-right direction. Specifically, the first levers 54b and the second levers 55b extend in opposite directions from each other relative to the
2016247079 19 Oct 2016 rotational center C2 when seen along the left-right direction.
[0074] The first sealing jaw 51b functions as a pair with the first sealing jaw 51a of the first rotating body 50a. The first sealing jaw 5 lb has a first sealing surface 51 lb of which the leftright direction is the longitudinal direction. The cylindrical film Fc is heat-sealed while sandwiched by the pair of first sealing jaws 51a, 51b. The first sealing surface 511b is a surface that contacts the cylindrical film Fc sandwiched by the pair of first sealing jaws 51a, 51b.
[0075] The longitudinal (left-right direction) ends of the first sealing jaw 51b are connected respectively to the ends of the pair of first levers 54b extending from the second rotating shaft 53b. The first levers 54b are connected to the second rotating shaft 53b. Therefore, the first sealing jaw 51b is supported, through the pair of first levers 54b, at both longitudinal ends by the second rotating shaft 53b.
[0076] The second sealing jaw 52b functions as a pair with the second sealing jaw 52a of the first rotating body 50a. The second sealing jaw 52b has a second sealing surface 512b of which the left-right direction is the longitudinal direction. The cylindrical film Fc is heatsealed while sandwiched by the pair of second sealing jaws 52a, 52b. The second sealing surface 512b is a surface that contacts the cylindrical film Fc sandwiched by the pair of second sealing jaws 52a, 52b.
[0077] The second sealing jaw 52b is connected at the longitudinal (left-right direction) ends respectively to the ends of the pair of second levers 55b extending from the second rotating shaft 53b. The second levers 55b are connected to the second rotating shaft 53b. Therefore, the second sealing jaw 52b is supported at both longitudinal ends by the second rotating shaft 53b, via the pair of second levers 55b.
[0078] The first levers 54b and the second levers 55b extend in opposite directions from each other relative to the rotational center C2 when seen along the left-right direction. Therefore, the first sealing jaw 51b and the second sealing jaw 52b, when seen along the left-right direction, are arranged as being positioned 180° apart from each other about the rotational center C2.
[0079] Heaters (not shown) are built into the first sealing jaw 51b and the second sealing jaw
52b. These heaters heat the first sealing surface 511b and the second sealing surface 512b.
2016247079 19 Oct 2016
The cylindrical film Fc is heat-sealed by coming into contact with the heated first sealing surface 511b and second sealing surface 512b and melting.
[0080] Cutter-receiving grooves 56b are formed in the first sealing jaw 51b and the second sealing jaw 52b as shown in FIG. 5. The cutter-receiving grooves 56b are formed along the longitudinal direction in the first sealing surface 511b and the second sealing surface 512b. The cutter-receiving grooves 56b are grooves that accommodate the distal ends of the cutters 56 projecting out of the cutter accommodation grooves 56a.
[0081] The cutters 56 are completely accommodated within the cutter accommodation grooves 56a while the cylindrical film Fc is not being transversely sealed by the pair of first sealing jaws 51a, 51b or the pair of second sealing jaws 52a, 52b. During this time, the distal ends of the cutters 56 do not protrude from the first sealing surface 511b and the second sealing surface 512b.
[0082] While the portion of the cylindrical film Fc that has already been transversely sealed is being cut by the cutters 56, the distal ends of the cutters 56 protrude from the first sealing surface 511b and the second sealing surface 512b. During this time, the distal ends of the cutters 56 go into the cutter-receiving grooves 56b.
[0083] (2-5) Punch mechanism [0084] At timing coincident with the transverse sealing of the cylindrical film Fc, the punch mechanism 19 opens a punch hole in the portion of the cylindrical film Fc that is already transversely sealed (referred to below as the transversely sealed portion). The punch hole is used, e.g., for a hook to be passed therethrough, to hang the bag B filled with the package contents C.
[0085] The punch mechanism 19 is configured mainly from a cylindrical punch 19a and a punch-receiving pin 19b. Cylindrical punches 19a are built into the first sealing jaw 51b and the second sealing jaw 52b of the second rotating body 50b. Punch-receiving pins 19b are built into the first sealing jaw 51a and the second sealing jaw 52a of the first rotating body 50a. FIG. 5 shows the cylindrical punch 19a built into the first sealing jaw 51b and the punch-receiving pin 19b built into the first sealing jaw 51a.
2016247079 19 Oct 2016 [0086] (2-5-1) Cylindrical punch [0087] FIG. 6 is an external view of a cylindrical punch 19a. FIG. 7 is a side view of a cylindrical punch 19a when the cylindrical punch 19a is seen along the left-right direction. In FIG. 7, the cylindrical punch 19a is drawn so that the longitudinal direction of the cylindrical punch 19a is the same as the forward-backward direction of FIG. 2. The cylindrical punch 19a has a cutting part 19al for cutting the transversely sealed portion and opening a punch hole, as shown in FIGS. 6 and 7. The cutting part 19al is the end part of the cutting part 19al. A blade 19a9 is attached to the distal end of the cutting part 19al. A recessed part 19a2 is formed in the lower part of the cutting part 19al.
[0088] The cylindrical punch 19a is a cylindrical member made of metal. A punch heater 19c is built into the cylindrical punch 19a. The punch heater 19c is an electrothermal heater for heating the cutting part 19al. The cutting part 19al is heated by the punch heater 19c to approximately 200°C. The punch heater 19c is electrically connected to an external power source (not shown) by a heat-resistant lead wire. Covered by glass tubes or the like, heatresistant lead wires are embedded in the first sealing jaw 51a and the second sealing jaw 52a.
[0089] In proximity to the cutting part 19al, a gap 19d for heat insulation is formed in between the external peripheral surface of the cylindrical punch 19a and the first sealing jaw 51a, as shown in FIG. 5. Inside the first sealing jaw 51a, on the side further from the first sealing surface 511b than the gap 19d, a heat-insulating material 19e is disposed between the external peripheral surface of the cylindrical punch 19a and the first sealing jaw 51a. Inside the first sealing jaw 51a on the side further from the first sealing surface 511b than the heatinsulating material 19e, the cylindrical punch 19a is fixed to the first sealing jaw 51a with a fixing member 19f. The above description can be applied to the second sealing jaw 52a as well.
[0090] In FIG. 7, the direction that is orthogonal to both the longitudinal direction of the cylindrical punch 19a (the left-right direction of the page of the drawing of FIG. 7) and the vertical direction (the up-down direction of the page of the drawing of FIG. 7) is the left-right direction in FIG. 2. The shape of the cutting part 19al as seen along the left-right direction in FIG. 2 is referred to below as the cutting part side-surface shape 19a3, as shown in FIG. 7. In FIG. 7, the cutting part side-surface shape 19a3 is shown by a thick dotted line. The cutting part side-surface shape 19a3 has a distal end 19a8. The distal end 19a8 is the farthest protruding portion of the cutting part 19al.
2016247079 19 Oct 2016 [0091] The cutting part side-surface shape 19a3 has a protruding part 19a4 as shown in FIG. 7. The protruding part 19a4 is the portion of the cylindrical punch 19a that protrudes in the longitudinal direction. The distal end 19a8 is the end of the protruding part 19a4 in the longitudinal direction of the cylindrical punch 19a. The protruding part 19a4 is shown as a hatched area in FIG. 7. An imaginary straight line 19a5 is shown as a dashed line inside the cutting part side-surface shape 19a3 in FIG. 7. The imaginary straight line 19a5 is a straight line joining the upper end 19a6 and lower end 19a7 at the longitudinal ends of the imaginary straight line 19a5. The protruding part 19a4 is a portion that protrudes past the imaginary straight line 19a5. Specifically, in FIG. 7, the distal end 19a8 is positioned farther left than the imaginary straight line 19a5.
[0092] In the cutting part side-surface shape 19a3, the line segment joining the distal end 19a8 and the upper end 19a6 and the line segment joining the distal end 19a8 and the lower end 19a7 are both straight lines. In FIG. 7, the angle 01 between the straight line joining the distal end 19a8 and the upper end 19a6 and the straight line joining the distal end 19a8 and the lower end 19a7 is 130 to 175°. In the cutting part side-surface shape 19a3, the upper end 19a6 protrudes past the lower end 19a7, and the distal end 19a8 protrudes past the upper end 19a6. The term protrudes used here means to be positioned nearer to the distal end 19a8 in the longitudinal direction of the cylindrical punch 19a (the left-right direction of the page of the drawing of FIG. 7).
[0093] FIG. 8 is a drawing representing the transversely sealed portion of the cylindrical film Fc after being cut by the cylindrical punch 19a. FIG. 8 is a drawing of the transversely sealed portion of the cylindrical film Fc as seen along the forward-backward direction of FIG. 2. In FIG. 8, the portion cut by the cylindrical punch 19a is an arc 19g shown by a thick line. The punch hole corresponds to the area on the inner side of the arc 19g that is cut by the cylindrical punch 19a.
[0094] A linking part RI, which links the punch hole interior and the punch hole exterior, is formed in the lower part of the punch hole as shown in FIG. 8. The linking part RI corresponds to the position of the recessed part 19a2 of the cylindrical punch 19a. The cutting part 19al of the cylindrical punch 19a does not have a blade in the recessed part 19a2. Therefore, when the cylindrical film Fc is cut by the cylindrical punch 19a, only the portion corresponding to the recessed part 19a2 is not cut. The linking part RI is thereby formed.
2016247079 19 Oct 2016 [0095] A cut-starting part R2 on the arc 19g, which is the area first cut by the cylindrical punch 19a, is shown in FIG. 8. The cut-starting part R2 is an area cut by the cylindrical punch 19a in a location corresponding to the distal end 19a8 of the cutting part 19al. The cut-starting part R2 is formed in proximity to the center part of the punch hole in the up-down direction. When a punch hole is opened in the cylindrical film Fc by the punch mechanism 19, the cutting part 19al of the cylindrical punch 19a first comes into contact with the cylindrical film Fc in the farthest protruding distal end 19a8. Therefore, the cut-starting part R2 is formed in the center part of the punch hole in the up-down direction.
[0096] (2-5-2) Punch-receiving pin [0097] FIG. 9 is an external view of a punch-receiving pin 19b. FIG. 10 is a side view of the punch-receiving pin 19b when the punch-receiving pin 19b is seen along the left-right direction. In FIG. 10, the punch-receiving pin 19b is drawn so that the longitudinal direction of the punch-receiving pin 19b constitutes the forward-backward direction of FIG. 2. Punchreceiving pins 19b are fixed to the first sealing jaw 51b and the second sealing jaw 52b, inside the first sealing jaw 51b and the second sealing jaw 52b, as shown in FIG. 5. The punchreceiving pins 19b are substantially columnar members made of metal. Each punchreceiving pin 19b has a pin distal end part 19b 1 which tapers. The pin distal end parts 19b 1 are portions that fit into the cutting parts 19al of the cylindrical punches 19a. The punchreceiving pins 19b need not be made of metal and may, e.g., be made of plastic.
[0098] FIG. 11 is a cross-sectional view, as seen from the right side of FIG. 2, of the pair of first sealing jaws 51a, 51b when the cylindrical film Fc is sandwiched between the first sealing jaws 51a, 51b. In FIG. 11, the cylindrical film Fc is omitted. FIG. 11 represents a state in which the pin distal end part 19b 1 of the punch-receiving pin 19b is as far as possible into the cutting part 19al of the cylindrical punch 19a. In FIG. 11, the area where the pin distal end part 19b 1 enters the cylindrical punch 19a is shown as an area enclosed by a thick line.
[0099] The cylindrical film Fc is sandwiched by the heated cylindrical punch 19a and the punch-receiving pin 19b, whereby the punch mechanism 19 cuts the cylindrical film Fc while melting the film and opens a punch hole. The transversely sealed portion of the cylindrical film Fc is cut by the punch mechanism 19 into the shape of the arc 19g as shown in FIG. 8, and a punch hole, which is a hole formed in the inner side of the arc 19g, is opened in the transversely sealed portion.
2016247079 19 Oct 2016 [0100] (3) Action of form-fill-seal machine [0101] (3-1) Overall action [0102] First, a summary of the operation whereby the form-fill-seal machine 1 fills a bag B with package contents C shall be described. The film F supplied from the film supply unit 4 to the shaping mechanism 13 is wound about the tube 13a and shaped into a cylinder, and is then conveyed downward by the pull-down belt mechanism 14. The film F, in the shape of a cylinder wound about the tube 13 a, is made to overlap at both ends extending in the up-down direction. The overlapping portions of the cylindrically shaped film F are sealed in the longitudinal direction by the longitudinal sealing mechanism 15, forming the cylindrical film Fc.
[0103] The longitudinally sealed cylindrical film Fc is removed from the tube 13a and conveyed downward to the transverse sealing mechanism 17. Using the pair of first sealing jaws 51a, 51b or the pair of second sealing jaws 52a, 52b, the transverse sealing mechanism 17 sandwiches and transversely seals the cylindrical film Fc. At this time, package contents C that have already been loaded are present inside the cylindrical film Fc below the transversely sealed portion of the cylindrical film Fc. This transverse sealing operation forms a bag B, into which the already loaded package contents C are sealed, below the pair of sealing jaws 51a, 51b or 52a, 52b. The package contents C weighed by the combination weighing unit 2 fall into the tube 13a and the package contents C are loaded into the cylindrical film Fc above the transversely sealed portion of the cylindrical film Fc.
[0104] At timing coincident with the transverse sealing of the cylindrical film Fc, the transversely sealed portion of the cylindrical film Fc is cut in the transverse direction by the cutter 56 built into the first sealing jaw 51a or the second sealing jaw 52a. In so doing, the bag B in which the package contents C are sealed is cut away from the trailing cylindrical film Fc.
[0105] At timing coincident with the transverse sealing of the cylindrical film Fc, a punch hole is opened in the transversely sealed portion of the cylindrical film Fc by the cylindrical punch 19a and the punch-receiving pin 19b.
[0106] In this way, the bags B in which the package contents C are sealed are manufactured continuously. The manufactured bags B are then guided by a belt conveyor (not shown) and
2016247079 19 Oct 2016 transferred to a thickness checker, a weight checker, and other devices used in post processing.
[0107] (3-2) Transverse sealing mechanism operation in detail [0108] Next, the detailed operation of the transverse sealing mechanism 17 shall be described. The transverse sealing mechanism 17 transversely seals the cylindrical film Fc by causing the first rotating body 50a and the second rotating body 50b to rotate synchronously in opposite directions of each other when seen from the left-right direction, as shown in FIG. 4.
[0109] The first rotating body 50a rotates about the rotational center Cl with the first rotating shaft 53a driven by a drive motor (not shown). The second rotating body 50b rotates about the rotational center C2 due to the second rotating shaft 53b being driven by a drive motor (not shown). The first sealing jaw 51a and the second sealing jaw 52a thereby rotate along a circular trajectory about the rotational center Cl, and the first sealing jaw 51b and the second sealing jaw 52b rotate along a circular trajectory about the rotational center C2.
[0110] The first rotating body 50a rotates clockwise about the rotational center Cl when seen along the left-right direction from the right side. Specifically, the first sealing jaw 51a and the second sealing jaw 52a rotate clockwise about the rotational center Cl when seen along the left-right direction from the right side.
[0111] The second rotating body 50b rotates counterclockwise about the rotational center C2 when seen along the left-right direction from the right side. Specifically, the first sealing jaw 51b and the second sealing jaw 52b rotate counterclockwise about the rotational center C2 when seen along the left-right direction from the right side.
[0112] There follow descriptions of the operation whereby the pair of first sealing jaws 51a, 5 lb heat-seal the cylindrical film Fc in the transverse direction, the operation whereby a punch hole is opened in the transversely sealed portion of the cylindrical film Fc, and the operation whereby a bag B formed by transverse sealing is cut away from the cylindrical film Fc.
[0113] The first rotating body 50a and the second rotating body 50b rotate in opposite directions of each other as shown in FIG 4. The first sealing jaw 51a of the first rotating body 50a and the first sealing jaw 51b of the second rotating body 50b thereby sandwich and apply pressure to the cylindrical film Fc conveyed downward between the first sealing surface 511a of the first sealing jaw 51a and the first sealing surface 511b of the first sealing jaw 51b.
2016247079 19 Oct 2016 [0114] With the cylindrical film Fc sandwiched by the pair of first sealing jaws 51a, 51b, the first sealing surface 511a and the first sealing surface 511b are heated by the heaters built into the first sealing jaw 51a and the first sealing jaw 51b. The transversely sealed portion of the cylindrical film Fc is thereby heat-sealed.
[0115] The first sealing surface 511a and the first sealing surface 511b, when seen from the left-right direction of FIG. 2, have substantially arcuate shapes as shown in FIG. 5. Therefore, the downward-conveyed cylindrical film Fc is sequentially heat-sealed from the downstream side (the leading side in the conveying direction) toward the upstream side (the trailing side in the conveying direction) by the rotational motion of the first sealing jaws 51a, 51b along circular trajectories. FIG 11 represents the state at the time when the downstream side of the cylindrical film Fc is heat-sealed.
[0116] While the cylindrical film Fc is being transversely sealed by the pair of first sealing jaws 51a, 51b, the distal end of the cutter 56 built into the first sealing jaw 51a protrudes from the first sealing surface 511a. The transversely sealed portion of the cylindrical film Fc is thereby cut in the transverse direction by the cutter 56. Thus, at timing coincident with the transverse sealing of the cylindrical film Fc, the cutter 56 pushes into the center part in the updown direction of the transversely sealed portion of the cylindrical film Fc and cuts the transversely sealed portion in the transverse direction. As a result, the bag B beneath the transversely sealed portion is cut away from the following cylindrical film Fc.
[0117] While the cylindrical film Fc is being transversely sealed by the pair of first sealing jaws 51a, 51b, the cylindrical film Fc is also sandwiched by the cylindrical punch 19a built into the first sealing jaw 51a and the punch-receiving pin 19b built into the first sealing jaw 51b. The transversely sealed portion of the cylindrical film Fc is thereby cut into the shape of the arc 19g as shown in FIG 8. Thus, the punch mechanism 19 opens a punch hole in the transversely sealed portion of the cylindrical film Fc at timing coincident with the transverse sealing of the cylindrical film Fc.
[0118] In the transverse sealing mechanism 17, the downward-conveyed cylindrical film Fc is sequentially heat-sealed from the downstream side toward the upstream side. Therefore, immediately before the transverse sealing of the cylindrical film Fc is completed, the upstream-side portion is not heat-sealed but the downstream-side portion is heat-sealed. Therefore, the form-fill-seal unit 3 is able to open a punch hole in the transversely sealed portion of the cylindrical film Fc and to cut the transversely sealed portion to cut the bag B 19
2016247079 19 Oct 2016 away from the cylindrical film Fc, even at a point in time when the transverse sealing of the cylindrical film Fc is not completely finished.
[0119] The operation whereby the pair of second sealing jaws 52a, 52b heat-seal the cylindrical film Fc in the transverse direction is the same as the operation whereby the pair of first sealing jaws 51a, 51b heat-seal the cylindrical film Fc in the transverse direction, and is therefore not described.
[0120] (4) Characteristics [0121] (4-1) [0122] The form-fill-seal machine 1 includes the punch mechanism 19 for opening a punch hole in the transversely sealed portion of the cylindrical film Fc. The punch mechanism 19 includes the cylindrical punch 19a. The cutting part 19al of the cylindrical punch 19a has the cutting part side-surface shape 19a3 which has the protruding part 19a4 when seen along the left-right direction, as shown in FIG. 7. When the cylindrical punch 19a opens a punch hole in the transversely sealed portion of the cylindrical film Fc, the portion corresponding to the protruding part 19a4 first comes into contact with the cylindrical film Fc and starts cutting the cylindrical film Fc in the cut-starting part R2 shown in FIG. 8.
[0123] Beginning with the cut-starting part R2 cut by the portion corresponding to the protruding part 19a4, the cutting part 19al then cuts the cylindrical film Fc into a punch hole shape as shown by the thick line in FIG. 8. The cylindrical punch 19a can thereby smoothly open a punch hole in the transversely sealed portion of the cylindrical film Fc. Therefore, the form-fill-seal machine 1 can efficiently open a punch hole in the sealed portion of the cylindrical film Fc.
[0124] FIG. 12 is a cross-sectional view of a pair of sealing jaws including a cylindrical punch as a comparative example. FIG. 12 is a cross-sectional view similar to FIG. 11, which relates to the present embodiment. FIG. 12 shows a cylindrical punch 119a and a punchreceiving pin 119b. In FIG. 12, the area in which a pin distal end part 119bl of the punchreceiving pin 119b enters the cylindrical punch 119a is shown as an area enclosed by a thick line. A cutting part 119al of the cylindrical punch 119a has a different shape from the cutting part 19al of the present embodiment. A punch heater 19c is built into the cylindrical punch 119a. Aside from the cutting part 119al, the present embodiment and the comparative
2016247079 19 Oct 2016 example share the same configuration.
[0125] The cutting part 119al of the comparative example does not have a portion corresponding to the protruding part 19a4 of the present embodiment. The side-surface shape of the cutting part 119al (the shape corresponding to the cutting part side-surface shape 19a3 of the present embodiment) is a straight line extending from the upper end 119a6 toward the lower end 119a7 as shown in FIG. 12. Therefore, the cutting part 119al cannot first come into contact with the cylindrical film Fc and start to cut the cylindrical film Fc in the cutstarting part R2 on the arc 19g shown in FIG. 8. The cutting part 119al first comes into contact with either the highest point or the lowest point on the arc 19g shown in FIG. 8 and starts to cut the cylindrical film Fc. In this case, the cutting part 119al continues to cut the cylindrical film Fc either from the highest point toward the lowest point on the arc 19g, or from the lowest point toward the highest point on the arc 19g. The cutting part 119al of the present embodiment, on the other hand, continues to cut the cylindrical film Fc from the cutstarting part R2 on the arc 19g toward both the highest point and the lowest point on the arc 19g. Therefore, the distance of continuous cutting by the cutting part 119al of the comparative example is longer than the distance of continuous cutting by the cutting part 19al of the present embodiment. Therefore, the cutting part 119al of the comparative example cannot open a punch hole in the transversely sealed portion of the cylindrical film Fc as efficiently as the cutting part 19al of the present embodiment.
[0126] The area in which the punch-receiving pin 119b shown in FIG. 12 enters the cylindrical punch 119a is also smaller than the area in which the punch-receiving pin 19b shown in FIG. 11 enters the cylindrical punch 19a. The larger the area in which the punchreceiving pin 119b enters the cylindrical punch 119a is, the more firmly the cylindrical film Fc can be sandwiched, and a punch hole can therefore be opened more smoothly in the transversely sealed portion of the cylindrical film Fc. Therefore, the cutting part 119al of the comparative example opens a punch hole in the transversely sealed portion of the cylindrical film Fc less smoothly than the cutting part 19al of the present embodiment.
[0127] In the punch mechanism shown in FIG. 12, the output of the punch heater 19c built into the cylindrical punch 119a must be raised above the normal output in order for the cylindrical punch 119a to efficiently open a punch hole in the sealed portion of a cylindrical film that is thicker than normal. However, raising the output of the punch heater 19c brings the risk of worsening the appearance of the bag due to the cylindrical film around the punch
2016247079 19 Oct 2016 hole melting, or reducing the service life of the punch heater 19c. Instead of raising the output of the punch heater 19c, changing the position of the cylindrical punch 119a to be closer to the punch-receiving pin 119b so that the cylindrical film is sandwiched more firmly brings the risk of the cutting part 119al of the cylindrical punch 119a coming into contact with a member other than the cylindrical film (e.g, the pin distal end part 119bl of the punchreceiving pin 119b) and the cylindrical punch 119a degrading.
[0128] In the cylindrical punch 19a of the present embodiment, the protruding part 19a4 is provided in the cutting part 19al. The form-fill-seal machine 1 can thereby efficiently open a punch hole in the transversely sealed portion of the cylindrical film Fc without increasing the output of the punch heater 19c built into the cylindrical punch 19a, and without changing the position of the cylindrical punch 19a.
[0129] (4-2) [0130] In the form-fill-seal machine 1, the cutting part 19al of the cylindrical punch 19a has a shape that is sharp at the distal end 19a8 when seen along the left-right direction of FIG. 2. The cylindrical film Fc is thereby smoothly cut by the portion corresponding to the distal end 19a8 when the cutting part 19al cuts the transversely sealed portion of the cylindrical film Fc. Therefore, the form-fill-seal machine 1 can efficiently open a punch hole in the transversely sealed portion of the cylindrical film Fc.
[0131] (4-3) [0132] In the form-fill-seal machine 1, the cutting part 19al of the cylindrical punch 19a has a shape such that the upper end 19a6 protrudes past the lower end 19a7 when seen along the left-right direction of FIG. 2. The transverse sealing mechanism 17 sequentially heat-seals the downward-conveyed cylindrical film Fc from the downstream side (the leading side in the conveying direction) toward the upstream side (the trailing side in the conveying direction), as shown in FIG. 11. Therefore, when the lower end of the cutting part 19al of the cylindrical punch 19a protrudes too far, there is a risk that the cutting part 19al will come into contact with the punch-receiving pin 19b. However, it is possible to prevent the cutting part 19al from coming into contact with the punch-receiving pin 19b by having the lower end 19a7 of the cutting part 19al not protrude past the upper end 19a6. Therefore, degradation of the cylindrical punch 19a can be suppressed in the form-fill-seal machine 1.
2016247079 19 Oct 2016 [0133] (4-4) [0134] After the cylindrical punch 19a is used to open a punch hole in the transversely sealed portion of the cylindrical film Fc, the form-fill-seal machine 1 can cut the transversely sealed portion so that the punch-hole-shaped cut piece of the cylindrical film Fc is joined to the transversely sealed portion of the cylindrical film Fc in the linking part Rl shown in FIG. 8. The punch-hole-shaped cut piece of the cylindrical film Fc is thereby prevented from falling below the form-fill-seal unit 3 and scattering. Therefore, a punch hole can be efficiently opened in the sealed portion of the cylindrical film Fc because cut pieces of the cylindrical film Fc that have fallen do not need to be recovered.
[0135] (5) Modifications [0136] While the present invention has been described above in terms of one preferred embodiment, the present invention is not limited to this embodiment; various modifications are possible without departing from the scope of the invention.
[0137] (5-1) Modification A [0138] In the present embodiment, the cutting part side-surface shape 19a3 has the protruding part 19a4 as shown in FIG. 7. The protruding part 19a4 is a portion positioned to the left of the imaginary straight line 19a5. In the cutting part side-surface shape 19a3, the line segment joining the distal end 19a8 and the upper end 19a6 and the line segment joining the distal end 19a8 and the lower end 19a7 are straight lines.
[0139] However, in the cutting part side-surface shape 19a3, at least one of the line segment joining the distal end 19a8 and the upper end 19a6 and the line segment joining the distal end 19a8 and the lower end 19a7 need not be a straight line. FIG. 13 is a side view, as seen along the left-right direction, of a cylindrical punch 219a according to the present modification. FIG. 13 shows a cutting part 219al of the cylindrical punch 219a, a cutting part side-surface shape 219a3, a protruding part 219a4, an imaginary straight line 219a5, an upper end 219a6, a lower end 219a7, and a distal end 219a8. The cutting part side-surface shape 219a3 is shown with a thick line. The protruding part 219a4 is shown as a hatched area.
[0140] In the cutting part side-surface shape 219a3, the line segment joining the distal end
219a8 and the upper end 219a6 and the line segment joining the distal end 219a8 and the lower end 219a7 are curves that are convex toward the distal end 219a8. In the cutting part
2016247079 19 Oct 2016 side-surface shape 219a3, the upper end 219a6 protrudes past the lower end 219a7, and the distal end 219a8 protrudes past the upper end 219a6.
[0141] In the cylindrical punch 219a of the present modification, the protruding part 219a4 on the left side of the imaginary straight line 219a5 bulges farther toward the distal end 219a8 than in the cylindrical punch 19a of the embodiment. Therefore, the area in which the punchreceiving pin 19b enters the cylindrical punch 219a is greater than in the cylindrical punch 19a of the embodiment. Therefore, the cylindrical punch 219a can sandwich the cylindrical film Fc more firmly than the cylindrical punch 19a of the embodiment. Therefore, the cylindrical punch 219a can smoothly open a punch hole in the transversely sealed portion of the cylindrical film Fc.
[0142] In the present modification, at least one of the line segment joining the distal end 219a8 and the upper end 219a6 and the line segment joining the distal end 219a8 and the lower end 219a7 may be a straight line.
[0143] (5-2) Modification B [0144] In the present embodiment, the cutting part side-surface shape 19a3 has the protruding part 19a4 as shown in FIG. 7. In the cutting part side-surface shape 19a3, the upper end 19a6 protrudes past the lower end 19a7, and the distal end 19a8 protrudes past the upper end 19a6.
[0145] However, in the cutting part side-surface shape 19a3, the upper end 19a6 may be arbitrarily positioned provided that the upper end 19a6 does not protrude past the distal end 19a8. FIG. 14 is a side view, as seen along the left-right direction, of a cylindrical punch 319a according to the present modification. FIG. 14 shows a cutting part 319al of the cylindrical punch 319a, a cutting part side-surface shape 319a3, a protruding part 319a4, an imaginary straight line 319a5, an upper end 319a6, a lower end 319a7, and a distal end 319a8. The cutting part side-surface shape 319a3 is shown with a thick line. The protruding part 319a4 is shown as a hatched area.
[0146] In the cutting part side-surface shape 319a3, the line segment joining the distal end
319a8 and the upper end 319a6 and the line segment joining the distal end 319a8 and the lower end 319a7 are straight lines. In FIG. 14, the straight line joining the distal end 319a8 and the upper end 319a6 and the straight line joining the distal end 319a8 and the lower end
2016247079 18 Dec 2017
319a7 form an angle 02 of 130 to 175°. In the cutting part side-surface shape 319a3, the upper end 319a6 protrudes past the lower end 319a7, and the distal end 319a8 does not protrude past the upper end 319a6. Specifically, the distal end 319a8 has the same position as the upper end 319a6 in the forward-backward direction (the left-right direction of the page of the drawing in FIG. 14). Specifically, in FIG. 14, the straight line joining the distal end 319a8 and the upper end 319a6 is parallel to the up-down direction.
[0147] The cutting part 319al of the cylindrical punch 319a has a shape that is sharp at the distal end 319a8 in the present modification as well. The portion corresponding to the protruding part 319a4 can thereby smoothly cut the cylindrical film Fc when the cutting part 319al opens a punch hole in the transversely sealed portion of the cylindrical film Fc. Therefore, the cylindrical punch 319a can efficiently open a punch hole in the transversely sealed portion of the cylindrical film Fc.
2016247079 19 Oct 2016 [0149] REFERENCE SIGNS LIST
Form/fill/seal machine
Shaping mechanism
Pull-down belt mechanism
Longitudinal sealing mechanism
Transverse sealing mechanism
Punch mechanism
19a Cylindrical punch
19al Cutting part
19a2 Recessed part
19a3 Cutting part side-surface shape
19a4 Protruding part
19a5 Imaginary straight line
19a6 Upper end
19a7 Lower end
19a8 Distal end
19b Punch-receiving pin la, 5 lb First sealing jaws (pair of sealing members)
52a, 52b Second sealing jaws (pair of sealing members)
B Bag
C Package contents
F Film (packaging material)
Fc Cylindrical film (tube-shaped packaging material)
CITATION LIST
PATENT LITERATURE
Patent Literature 1: Japanese Laid-open Patent Application No. 2006-36246
2016247079 20 Apr 2018

Claims (14)

  1. THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:
    1. A form-fill-seal machine for filling and hermetically sealing package contents in a tubeshaped packaging material, the form-fill-seal machine including:
    a transverse sealing mechanism for sandwiching the packaging material using a pair of sealing members disposed on left and right sides of the packaging material and sealing the packaging material in a transverse direction, and having a first rotating body and a second rotating body; and a punch mechanism having a cylindrical punch for opening a punch hole in a transversely sealed portion that has been sealed by the transverse sealing mechanism, and a punch-receiving pin for receiving the cylindrical punch;
    the cylindrical punch having a cutting part for cutting the transversely sealed portion to open the punch hole; and a cutting part side-surface shape, which is a shape of the cutting part seen from a direction orthogonal to both a longitudinal direction of the cylindrical punch and a vertical direction, having a protruding part that protrudes past an imaginary straight line joining an upper end and a lower end of an end part of the cutting part side-surface shape in the longitudinal direction, the first and second rotating bodies rotating synchronously in opposite directions of each other when seen along rotating shafts of the first and second rotating bodies, the cylindrical punch being built into one of the pair of sealing members supported by the second rotating body, the punch-receiving pin being built into the other of the pair of sealing members supported by the first rotating body, the pair of sealing members having sealing surfaces that have substantially arcuate shapes when seen along the rotating shafts.
  2. 2. The form-fill-seal machine according to claim 1, wherein the cutting part side-surface shape has a shape such that a line segment joining the upper end and a distal end of the protruding part in the longitudinal direction, and a line segment joining the distal end and the lower end, are straight lines.
    2016247079 20 Apr 2018
  3. 3. The form-fill-seal machine according to claim 2, wherein the cutting part side-surface shape has a shape such that the upper end protrudes past the lower end, and the upper end does not protrude past the distal end.
  4. 4. The form-fill-seal machine according to any of claims 1 to 3, wherein the cylindrical punch has a recessed part formed in a lower part of the cutting part.
    1/14
    2016247079 19 Oct 2016
    F I G. 1
    2/14
    2016247079 19 Oct 2016
    M^14b
    LEFT
    FRONT
    REAR
    RIGHT
    DOWN
    F I G. 2
    3/14
    2016247079 19 Oct 2016
    D
    O in
    CO ό
    4/14
    2016247079 19 Oct 2016 |V~Fc
    UP
    FRONT
    DOWN
    REAR
    F I G. 4
  5. 5/14
    2016247079 19 Oct 2016
  6. 6/14
    2016247079 19 Oct 2016
  7. 7/14
    2016247079 19 Oct 2016
  8. 8/14
    2016247079 19 Oct 2016 d
  9. 9/14
    2016247079 19 Oct 2016 _Q
    CD
  10. 10/14
    2016247079 19 Oct 2016
    Dd <
    LLI
    Dd
    LL
  11. 11/14
    2016247079 19 Oct 2016
  12. 12/14
    2016247079 19 Oct 2016
  13. 13/14
    2016247079 19 Oct 2016
  14. 14/14
    2016247079 19 Oct 2016
AU2016247079A 2015-10-27 2016-10-19 Form-fill-seal machine Active AU2016247079B2 (en)

Applications Claiming Priority (2)

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JP2015-210553 2015-10-27
JP2015210553A JP2017081585A (en) 2015-10-27 2015-10-27 Bag making and packaging machine

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AU2016247079B2 true AU2016247079B2 (en) 2018-05-10

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022014006A1 (en) * 2020-07-16 2022-01-20 株式会社イシダ Bag manufacturing and packing machine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2105897A1 (en) * 1993-02-24 1994-08-25 David Brian Everette Hole punch for end seal pouch
US5451288A (en) * 1992-11-05 1995-09-19 Smith; Larry Heated die punch construction and control device
US20040088948A1 (en) * 2002-11-01 2004-05-13 Ishida Co., Ltd. Bag manufacturing and packaging apparatus
US20070044618A1 (en) * 2005-08-30 2007-03-01 Marks Joel S Hole punch element
US20110041457A1 (en) * 2009-08-18 2011-02-24 Lako Tool & Manufacturing, Inc. Hot punch assembly for providing an opening in packaging material
US20110293208A1 (en) * 2008-10-07 2011-12-01 Cadbury Holding Limited Packaging
EP2505340A1 (en) * 2011-04-01 2012-10-03 ROPEX Industrie-Elektronik GmbH Film joining device, film bag and method for joining film sheets together

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5451288A (en) * 1992-11-05 1995-09-19 Smith; Larry Heated die punch construction and control device
CA2105897A1 (en) * 1993-02-24 1994-08-25 David Brian Everette Hole punch for end seal pouch
US20040088948A1 (en) * 2002-11-01 2004-05-13 Ishida Co., Ltd. Bag manufacturing and packaging apparatus
US20070044618A1 (en) * 2005-08-30 2007-03-01 Marks Joel S Hole punch element
US20110293208A1 (en) * 2008-10-07 2011-12-01 Cadbury Holding Limited Packaging
US20110041457A1 (en) * 2009-08-18 2011-02-24 Lako Tool & Manufacturing, Inc. Hot punch assembly for providing an opening in packaging material
EP2505340A1 (en) * 2011-04-01 2012-10-03 ROPEX Industrie-Elektronik GmbH Film joining device, film bag and method for joining film sheets together

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