US3775225A - Machine for perforating and heat sealing a web including an elongated element with a multiplicity of drivers - Google Patents

Machine for perforating and heat sealing a web including an elongated element with a multiplicity of drivers Download PDF

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Publication number
US3775225A
US3775225A US3775225DA US3775225A US 3775225 A US3775225 A US 3775225A US 3775225D A US3775225D A US 3775225DA US 3775225 A US3775225 A US 3775225A
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US
United States
Prior art keywords
force
drive
length
elongated
drivers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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English (en)
Inventor
C Schott
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gloucester Engineering Co Inc
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Gloucester Engineering Co Inc
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Publication date
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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
    • B29C66/80—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
    • 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
    • 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
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
    • B29C66/0044—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined using a separating sheet, e.g. fixed on the joining 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
    • B29C66/01—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
    • 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
    • B29C66/812—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • 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
    • B29C66/81419—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 and flat
    • 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
    • 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
    • B29C66/81431—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 cavity, e.g. a groove
    • 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
    • B29C66/818—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • 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
    • B29C66/822—Transmission mechanisms
    • B29C66/8226—Cam mechanisms; Wedges; Eccentric mechanisms
    • 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
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29C66/816—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 mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—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 mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • 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
    • B29C66/822—Transmission mechanisms
    • B29C66/8223—Worm or spindle mechanisms
    • 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
    • B29C66/822—Transmission mechanisms
    • B29C66/8225—Crank mechanisms
    • 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
    • B29C66/822—Transmission mechanisms
    • B29C66/8226—Cam mechanisms; Wedges; Eccentric mechanisms
    • B29C66/82261—Wedges
    • 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
    • B29C66/851—Bag or container making machines
    • B29C66/8511—Bag making machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/003—Flexible containers made from webs starting from tubular webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2170/00—Construction of flexible containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/60—Uniting opposed surfaces or edges; Taping
    • B31B50/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure, e.g. by welding
    • B31B50/645—Making seals transversally to the direction of movement
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8841—Tool driver movable relative to tool support

Definitions

  • Slackness in web during heat sealing or supplemental indexing is produced by rotation of the normally stationary portion of a single direction clutch whose movable part is engaged with a shuttle belt. Compensation for slip and slackening also are achievable employing a differential drive between input and output nip roll pairs, with selected driving of the third shaft of the differential. Prolonged driving of the same differential can establish a desired speed ratio between the two nip pairs to compensate for slip, and change of the rotational input in response to a position sensor serves as a registry control.
  • Objects of the invention include providing such machines which are reliable and of high speed and in which the reciprocating member can be made of any length, e.g., longer than feet, to span webs of similar width.
  • Particular objects are to provide such a machine which can act upon wide plastic webs with controllable accuracy over the entire extent of the active element.
  • the invention features an elongated element or forming surface and its associated reciprocating assembly which lacks self-support over its length sufficient to maintain the desired geometry of the element.
  • Stationary structure which extends along the length of the element allows the desired back and forth motion of the element, and a multiplicity of drivers are spaced apart along the element, at its middle as well as at its ends.
  • Each of these drivers includes a drive-force-receiving portion on the movable assembly and a drive force applying portion positioned by the stationary structure and mounted for movement relative to it.
  • a main drive drives all of the force-applying portions in synchronisrn. This movement is effective to move the element in the predetermined direction and at the same time maintain the proper position and geometry of the element.
  • the movable element may be of low mass (permitting high speed), of simple construction and capable of simple adjustment, e.g., to contour the element as desired.
  • Preferred embodiments of the invention feature: a series of individual adjustment devices along the length of the active element; the stationary structure comprising an elongated beam extending across the width of the web and supported on end columns; associated drive means, for the drivers, extending along the elongated beam; active elements as forming dies, specifically exampled by a plastic heat-sealing bar, as plastic penetrating means exampled by a plastic perforator and as clamping surfaces exampled by the heat seal bar as well as strippers associated with the perforator.
  • active elements as forming dies, specifically exampled by a plastic heat-sealing bar, as plastic penetrating means exampled by a plastic perforator and as clamping surfaces exampled by the heat seal bar as well as strippers associated with the perforator.
  • active elements as forming dies, specifically exampled by a plastic heat-sealing bar, as plastic penetrating means exampled by a plastic perforator and as clamping surfaces exampled by the heat seal bar as well as strippers associated
  • the invention features the drivers as cam assemblies; the active element slidably guided by the stationary structure to reciprocate linearly; a series of support columns associated with the active element; and push rod actuation of a linkage for driving the drivers in synchronism; and both rotary and axially operable actuators provide means for driving the push rods and adjusting the stroke.
  • positioning torque is applied to the active element preferably by the same series of springs that provide for return movement of the active element.
  • FIG. 1 is a perspective view, partially broken away, of a preferred embodiment of the invention useful for manufacturing plastic bags;
  • FIG.- 2 is a diagrammatic, partially broken away perspective view of the machine of FIG. 1 viewing the side of the heat seal bar mechanism;
  • FIG. 3 is a cross-sectional view of the embodiment of FIG. 1 taken on line 33 thereof;
  • FIG. 4 is a cross-sectional view on a larger scale of portions of FIG. 3 showing the heat seal bar assembly details
  • FIG. 5 is a view on scale similar to FIG. 4 showing perforator blade assembly details
  • FIG. 6 is a partially diagrammatic plan view with portions broken away of the preferred embodiment
  • FIG. 7 is a side view of one side of the machine showing in particular the actuating arrangement for the heat seal bar
  • FIG. 8 is a side view of the other side of the machine showing the actuating arrangement for the perforator blade
  • FIG. 9 is a diagrammatic side view of a film drive according to the invention
  • FIGS. 10 and 11 are cross-sectional, partially diagrammatic views of preferred one way clutch assemblies for accomplishing web salackening and supplemental indexing.
  • a preferred embodiment of the invention in which polyethylene film-8 is introduced between a horizontal heat sealing bar 10, of length L, e.g., of l0.or 10 feet, and a lower platen 12.
  • the elongated reciprocating heat sealing bar 10 is connected to driven column members 14 through flexures 18, all forming part of an elongated vertically reciprocating assembly.
  • the reciprocating assembly is intentionally light-weight so that it may reciprocate quickly; however the assemblyy lacks sufficient selfsupport to maintain the proper geometry of the heat sealing surface 10a along its entire length.
  • the column members 14 are driven at theirupper ends in the vertical direction, transverse to the length of the heat sealing bar, by reciprocating cam assemblies which are spaced apart along the length of the heat sealing bar.
  • Each of these comprises a first portion, cam followers 22, and a second portion, cam surfaces 24.
  • the cam surfaces are reciprocated synchronously in the longitudinal, horizontal direction by a plurality of connecting rods 28 in a direction parallel to the heat sealing bar, these rods interconnecting the cam surfaces with a drive means 30, for example, a hydraulic-actuated piston.
  • the cam surfaces are slidably positioned for this motion by vertically adjustable extensions 31 FIG. 2 (see 68 FIG. 3) of the stationary structure 32, which comprises a rigid beam extending across the width of the web, supported by end pedestals 32a.
  • the cam assembly is-urged together by the action of arms 33, connected to columns 14, and springs 34; the resultant force of the springs tending to urge the cam followers against the respective cam surfaces.
  • the rigidity of the stationary structure is thus transferred to the reciprocating assembly through the adjustable extensions 31, via the cam assemblies, and eventually to th heat sealing bar through the flexures 18 which are stiff in the vertical direction.
  • the flexure connections are made periodically along the heat sealing bar, thus providing several points of transfer of the supporting forces.
  • the first portions 22 of the driven assemblies i.e., the cam followers
  • the predetermined transverse direction i.e., the vertical direction
  • forces transmitted by the cam surfaces serve to support and position adjacent portions of the bar vertically so as to preserve the desired geometry of the elongated forming surface.
  • the forming surface thereby reciprocates between the inoperative position whereby the film can be advanced and the operative position whereby the plastic film is heat sealed.
  • the elongated heat sealing bar consists in part of an upper bar 38 and a lower bar 40 extending the length of the machine and welded as as to embrace an elongated resistive heater element 42 (e.g., of tubular type) also extending the length of the machine.
  • the heater element provides heat necessary for the sealing process.
  • Two small diameter bobbins 44 which extend the length of the machine and which support a non-stick, heat-resistant curtain 46 (preferably part Teflon), are also supported along the length of the heat sealing bar.
  • This curtain is wound around one bobbin, fitted around the exterior of the lower bar 40, and is then wound around the second bobbin, and is indexed periodically, as the exposed portion of the curtain is used, in a known manner.
  • This assembly i.e., the bars, bobbins and curtain
  • This assembly is supported at spaced apart points by individual brackets 43 connected to flexures 18. Openings 48 in these brackets provide isolation tending to prevent the structure above the openings from heating as the heat sealing bar becomes hot.
  • the brackets 43 typically ten inches apart, provide the means by which flexures l8 join the heat sealing bar to columns 14.
  • the brackets are slotted, providing two parts, and the flexure is typically joined to these parts by screws.
  • the flexure is a thin piece of metal, about 0.050 inch thick, the direction of thickness being arranged in the longitudinal direction of the bar and thus allows motion by the heat sealing bar in the longitudinal direction.
  • the flexure however has much greater dimensions in the vertical direction and in the other horizontal direction, and is therefore rigid in those directions.
  • the heat sealing bar will not distort as its temperature rises causing expansion, but rather will cause resilient deflection of the flexures in the longitudinal direction, while remaining straight in the vertical and other horizontal directions.
  • the stationary structure which supplies rigidity to the system, is composed of wall members welded together to provide an elongated horizontal tubular structure 51 extending the length of the reciprocating assembly.
  • the column members 14 pass through periodically spaced openings 53, one in each of two horizontal members, and upwardly to support cam followers 22.
  • the column members are typically one inch cross section tubular structures and the cam followers 22 are joined to the top ends of the column members.
  • Torque arm brackets 33 are joined to the column members within the tube 51 and extend horizontally.
  • a series of compression springs 34 are grounded on the stationary tube wall and act upon respective torque arms 33 to supply an upward force urging the cam followers upwardly against the cam surfaces 24.
  • the sum of all forces on the periodically spaced columns is sufficient to raise the weight of the reciprocating assembly and thus provide positive contact of all of the cam followers against the respective cam surfaces, and automatic return of the bars to the inoperative position upon deactivating movement of the cams.
  • the cam structure includes a plurality of machined, cam surfaces 24 linked together by connecting rods 28 to form a chain-like series wherein slight, self-adjusting rotation is allowed at joints 60.
  • Each cam surface 24 is slidably positioned against an adjustable L-shaped block 68, FIG. 3.
  • the L-shaped blocks slide in the vertical direction on rod which are secured to upper stationary structure 72.
  • the spacing between-the upper stationary structure and the upper surface of the L- shaped blocks is individually adjusted by the screws 74 which are secured in the tapped upper structure 72 and seat in the recesses 78 of the L-shaped blocks.
  • the action of the cam surfaces 24 against the cam followers 22 can produce significant longitudinal forces on the reciprocating assembly.
  • the force vector F resulting from the contact of the cam surfaces against the cam followers is essentially normal to the cam surfaces and therefore has both a vertical and a horizontal component.
  • the vertical component overcomes the spring forces and produces the downward motion.
  • the horizontal component is a longitudinal thrust force.
  • dowels 58 also secure third bearing members 80 (FIG. 7) which prevent longitudinal movement of columns 14 as a result of the longitudinal thrust force.
  • the drive means 30, which produces the reciprocating cam motion is preferably a hydraulic piston arrangement positioned as shown in FIG. 7.
  • the linear piston arrangement advantageously allows control of the driving force necessary for proper operative positioning of the sealing process when the machine is not run in a fixed gap condition.
  • the cylinder-piston rod arrangement preferably lies in a horizontal plane and engages the driven cam 304 at a vertical height substantially equal to the height at which the connecting rods engage the cam surfaces. In this manner, vertical moments resulting from the driving force are substantially eliminated.
  • the driving means must be angled away from the direction of motion of the cam rod chain, at an angle A, FIG. 6, the angle changing slightly as the hydraulic cylinder reciprocates.
  • the piston arrangement is horizontally arranged and consists of a hydraulic actuated cylinder 300 pivotally mounted at point 301 with drive rod 302 engaging driven cam 304 at a rotatable joint 306, preferably a bearing surface of antifriction material, to permit rotation during lengthening of the cylinder and resulting relative movement of the cam surface.
  • the bearing surface engaging drive rod 302 at 306 provides the reaction force to oppose the driving force and reduces forces normal to the driving force to a minimum.
  • the driving force at joint 306 has a driving component 312 in the direction of cam movement and a smaller component 314 normal to force 312 which force 314 being opposed by reaction forces from suitable bearing surfaces.
  • the throw of the linear piston driving means is fixed, however the position of the drive can be varied by adjusting screw 308 supported by stationary structure 310.
  • Screw 308 allows the position of pivot point 301 to be changed, changing the bottom position of the reciprocating member, allowing easy adjustment for varying thicknesses of web.
  • Pivot point 302 is defined by the recess of cylinder 300 which is engaged by the rounded end of screw 308'and remains fixed duringa series of sealing operations.
  • Drive rod 302 is always under compression to engage cam surface 304 and to ensure that the cylinder continues to engage adjusting screw 308 at a pivot point 301.
  • the forces tending to urge the surface of cam 304 against piston rod 302 are the upwardspring force supplied by springs 34, combined with the horizontal urging force supplied by spring 62.
  • the adjusting screws 74 and vertically adjustable L- shaped blocks 68 allow fine vertical adjustment of an individual cam surface to allow for local distortions or otherwise to contour the heat seal bar as desired. While the throw of the sealing bar is fixed by the reciprocating cam assemblies and the drive means, typically threeeighths inch, the extremes of the throw are locally translated
  • the sealingbar may be shaped by these perio'dically spaced adjustments to match any distortions inthe lower platen 12.
  • the upper stationary structure 72 is part of the tubular structure 51, this weldment providing sufficient rigidity for the accurate positioning and adjustment of the heat sealing bar reciprocating motion.
  • the perforating blade assembly unlike the heat sealing bar, need not dwell at the film and therefore may be heavier than the heat sealing bar because more time (hence slower permissible speed) is available to move the 'blade. It reciprocates as a result of reciprocating cam action in a similar manner as the heat sealing bar; however, periodically spaced adjustment is not necessary, an error of 0.045 inch along the length of the plate not being critical.
  • Plate 100 is biased against cam assemblies by the action of springs 102 against levers 104 (FIGS. 3, 5, 6) which are distributed periodically along the length of the plate 100.
  • Cam followers 106 are attached to a rigid support 108, and the cam surfaces 110 are urged against the cam followers by the action of the spring and lever.
  • contact is made by a nearly frictionless, rolling or sliding contact, thereby minimizing the transfer of horizontally directed forces against the perforating plate and eliminating the need for end bearings on the plate.
  • the preferred method (FIG. 8) consists of rollers 114 attached to plate 100, these rollers having a very low coefficient of friction with the cam.
  • the cam surface driven by driving means 350 is designated the master cam and is different in construction than the other reciprocating cams surfaces, the slave cams 110.
  • the master and slave cams are connected together and substantially aligned in one direction in a chain-like series by connecting rods 352 at joints 330 which allow limited rotation.
  • the driving means 350 forces the master cam to the right, FIG. 8, the resulting forces from drive cam followers 106 transmitted to the perforating plate 100 through roller 114, force the perforating plate downward, overcoming the spring force urging the perforating plate upward.
  • the driving means 350 is a hydraulic rotary actuator which advantageously has controlled acceleration.
  • the actuator has directional valves which provide selfcushioning; the cushioning occurs at the two dead center positions, which are apart and correspond to the extremes of travel of the perforating plate, and results from a small amount of hydraulic fluid, preferably oil, which remains in the actuator chamber unable to instantly escape from the chamber at the extreme of plate travel, thereby cushioning the extremes of travel of the drive means. It is the cushioning action which makes the rotary actuator not preferred for the reciprocating heat sealing bar because the forces at the extremes are difficult to control.
  • the range of travel of the perforating plate is established by the point 352 (FIG. 6) at which the drive rod 354, which engages the master cam at bearing surfaces 356, engages the oscillatory rotating drive wheel 358.
  • the rotation-allowing joint at point 352 is preferably a self-aligning spherical roller bearing which allows rotation as the drive wheel circularly oscillates driving the master cam in linear reciprocation.
  • the bottom position of the perforating plate can be adjusted by pivoting the rotary actuator supporting structure 360 about supporting pivot point 362.
  • Compression link 365 allows for horizontal movement of supporting structure 360 as it pivots about pivot point 362 thereby adjusting the bottoming position of the perforating plate.
  • Adjusting screw 364 is arranged with a shear pin to provide overload protection against the perforating plate bottoming out.
  • the shear pin will release, allowing supporting structure 360 to pivot clockwise about pivot point 362 relieving and reducing the built-up forces from the rotary actuator drive.
  • drive rod 354 engages the master cam at substantially the same height as the connecting rods 352; and therefore to avoid interference with those rods, the drive means is placed at an angle B to the plane of plate reciprocation.
  • the center of rotation 363 of the driver wheel is positioned at all times so that the driving force on the master cam always has an upward vertical component urging the master cam against the guides, cam followers 106.
  • a force normal to the plane of the perforating plate is generated because of the required angle B between the direction of drive and the direction of the cam reciprocation.
  • This force is opposed by supported sliding bearing surfaces, preferably anti-friction sliding bearing pads.
  • the master cam and slave cams are preferably placed approximately every twenty inches along the perforating plate.
  • the connecting rods are always in tension, tension being supplied by the pulling master cam as the perforating plate moves downward and are held in tension by the upward urging tendency of the perforating plate against the slave cams as the plate moves upward.
  • Each slave cam 110 moves to the right and downward, as the master cam 110' moves to the right and downward in response to the drive force, and following the action of the cam surface 370 against fixed guide cam follower 106.
  • the perforating plate reverses its direction the upward urging of the plate causes the slave cams to move upward and to the left in conjunction with the action of the master cam, the connecting rods always being kept in tension.
  • Uppper guide surface 374 ensures the path which the slave cams traverse.
  • the perforating blade 120 is mounted-in the bottom of the perforating plate 100.
  • a notch 1-22 is machined in the plate 100, in which the blade is positioned.
  • a resilient holding strip 124 is then placed in the notch to cover and hold the blade, and strippers 126 are held in place while the gib, securing the whole assembly, is fastened to the plate with fastener 129.
  • the strippers and web grippers 126 are slotted so that they may reciprocate vertically and are spring loaded 130 (FIG. 8) so that in moving vertically upward the spring force must be overcome. Therefore, as the plate 100 lowers, the strippers first contact the web. The plate continues to lower as the strippers remain stationary and the blade emerges from between the strippers to perforate the web. The motion of the plate is then reversed and as the plate moves upwards, the blade retreats between the strippers and any web still attached to the blade is stripped from the blade by strippers 126.
  • the web is advantageously driven periodically past the machine by a shuttle arrangement such as is shown in applicants prior U.S. Pats, No. 3,322,604, 3,361,614 and 3,526,563, to which reference is made.
  • the forming head 500 corresponds to the heat seal and perforator machine discussed so far.
  • the shuttle 510 driven by cylinder 512 takes up and pays out the web and the'single direction clutch 514, with its outer race normally stationary and its inner race engaged with timing belt 520, all as explained in U.S. Pat. No. 3,526,563.
  • a periodically operating drive here cylinder 540 is adapted to be actuated immediately after the heat seal bar raises.
  • cylinder 540 is adapted to be actuated immediately after the heat seal bar raises.
  • the result of this movement is that the plastic film moves slightly, proportional to the rotation of the outer race, and is thus removed from the hot jaws of the heat seal bar where it is cooled.
  • the cylinder may be returned to its original position, thus assuring registry.
  • FIG. 10 an alternate device is shown consisting of a chain drive which can selectively drive the outer race.
  • a longer range of travel can be obtained, thus to achieve a supplementary indexing effect.
  • the plastic heat seal can be advanced to a pair of cooling jaws.
  • a third input shaft 572 to the differential selectively driven by the motor 574 provides a different speed.
  • This motor can respond to tension sensor 576 to adjust rate of speed for slippage. By momentarily driving the shaft 572 at a different speed it is possible to slacken the film between the nip rolls, and reversal can remove the slack.
  • Another means of introducing slack is to translate a pair of nip rolls (or the idler as noted in dotted lines) slightly on a periodic basis as desired.
  • a machine suitable for forming articles from plastic film including an elongated forming surface adapted to be heated to a temperature sufficient to weld plastic film and means to move the forming surface in a predetermined path transverse to its length to an operative position against the film, and back therefrom to an inoperative position to allow advance of the plastic film
  • said elongated forming surface is defined by an elongated element flexible in the direction of said path, lacking selfsupport sufficient to maintain the proper geometry of said forming surface throughout its length, stationary structure extending along the length of said movable element and constructed and arranged to allow said motion, a multiplicity of drivers spaced apart along the length of said movable element, positioned at the middle as well as the ends thereof, each driver comprising a cam and roller follower combination, one of said combination comprising a drive-force-receiving portion associated with said movable element and the other comprising a cooperating drive-force-applying portion positioned by stationary structure and movable relative thereto, each said driver
  • said elongated element comprises a heat seal bar, a series of support columns spaced apart along the length of said bar are joined thereto through sheet-form flexures flexible only in the direction of the length of said bar, each column carrying thereon said drive-force-receiving portion of a respective cam and roller-follower combination.
  • said elongated forming surface is defined by an elongated element flexible in the direction of said path, lacking selfsupport sufficient to maintain the proper geometry of said forming surface throughout its length, stationary structure extending along the length of said movable element and constructed and arranged to allow said motion, a multiplicity of drivers spaced apart along the length of said movable element, positioned at the middle as well as the ends thereof, each driver comprising a drive-force-receiving portion associated with said movable element and a cooperating drive-forceapplying portion positioned by stationary structure and movable relative thereto, each said driver adapted, upon movement of its force-applying portion, to position and drive the respective portion of said movable element in said predetermined path, and a drive means for
  • an elongated element having a desired geometry along its length periodically moves in a predetermined path. transverse to said length, the element adapted to move against a web to act thereupon and away to allow web advance; the improvement wherein said elongated element is flexible in the direction of said path lacking self-support sufficient to maintain said desired geometry, stationary structure extending along the length of said movable element and constructed and arranged to allow said motion, a multiplicity of drivers spaced apart along the length of said movable element positioned at the middle as well as at the ends thereof, each driver comprising a drive-forcereceiving portion associated with said movable element and a cooperating drive-force-applying portion positioned by stationary structure and movable relative thereto, each said driver adapted, upon movement of its force-applying portion, to position and drive the respective portion of said movable element in said predetermined path, and a drive means for driving all of said force-applying portions of said drivers in synchronism to cause bodily movement of said
  • said machine adapted to operate across the width of an elongated traveling web, said stationary structure comprising an elongated beam structure, stationary during operation, supported on end columns and extending across the width of said web, and said machine including the combination of at least two elongated elements of the character above described, one of said elements comprising a heat seal bar and the other comprising a perforator blade, each element having associated therewith an independent drive means, each of said elements positioned by its drivers relative to said elongated beam structure.
  • an elongated element having a desired geometry along its length periodically moves in a predetermined path transverse to said length, the element adapted to move against a web to act thereupon and away to allow web advance
  • said elongated element is flexi ble in the direction of said path lacking self-support sufficient to maintain said desired geometry
  • stationary structure extending along the length of said movable element and constructed and arranged to allow said motion
  • each driver comprising a drive-forcereceiving portion associated with said movable element and a cooperating drive-force-applying portion positioned by stationary structure and movable relative thereto, each said driver adapted, upon movement of its force-applying portion, to position and drive the respective portion of said movable element in said predetermined path, and a drive in synchronism to cause bodily movement of said element, said force-applying portions and said stationary structure
  • said drivers comprise cam assemblies one of said portions of each assembly comprising a cam follower and the other of said portions comprising a cam surface engaged with said follower, and said cam assemblies are mutually driven by a linkage reciprocating in the direction parallel to the elongated element, the machine including resilient biasing means for resiliently urging said cam followers and cam surfaces together, said biasing means applying a torque tending to rotate said elongated element about its longitudinal axis, and said stationary structure includes bearing surfaces opposing said tendency to rotate, thereby cooperating to position said element, said biasing means comprising a series of springs, one end of each mounted to said stationary structure and the other end of each being positioned to apply a portion of said torque, there being a series of slidable supports spaced apart along the length of and movable with said movable element, each extending from said element to a said driver, each support including a torque arm extending sideways and each said spring engaging a said torque arm.
  • said element includes two spaced apart bobbins, and a curtain of heat resistant, non-adherent material extends between said bobbins under said heat sealing bar.
  • a plastic film-working machine having a pair of elongated plastic-working elements disposed side by side in proximity, each of said elements having a desired geometry along its length and movable in a predetermined path transverse to said length, each element adapted to move against a web to act thereupon and away to allow web advance, each said elongated element is flexible in the direction of said path lacking self-support sufficient to maintain said desired geometry, stationary structure extending along the length of each said movable element and constructed and arranged to allow said motion,'each of said elements having a multiplicity of drivers spaced apart along the length of the said movable element positioned at the middle as well as at the ends thereof, each driver comprising a cam and roller-follower combination having a drive-force-receiving portion assocated with the said movable element and a cooperating drive-forceapplying portion positioned by stationary structure and movable realtive thereto, each said driver adapted, upon movement of its force-applying portion, to position and drive the respective portion of
  • a machine for forming bags from plastic film including an elongated forming surface adapted to be heated to a temperature sufficient to weld superposed plastic films together and means to move the forming surface in apredetermined path transverse to its length to an operative position against the film, and back therefrom to an inoperative position to allow advance of the plastic film
  • said elongated forrning surface is defined by an elongated element flexible in the direction of said path, lacking selfsupport sufficient to maintain the proper geometry of said forming surface throughout its length, stationary structure extending along the length of said movable element and constructed and arranged to allow said motion, a multiplicity of drivers spaced apart along the length of said movable element, positioned at the middle as well as the ends thereof, each driver comprising a drive-force-receiving portion associated with said movable element and a cooperating drive-forceapplying portion positioned by stationary structure and movable relative thereto, each said driver adapted, upon movement of its force-applying portion, to position and
  • said drivers comprising cam assemblies, one of said portions of each assembly comprising a cam follower and the other of said portions comprising a cam surface engaged with said follower, said cam assemblies are mutually driven by a linkage reciprocating in the direction parallel to the elongated element, said linkage including movable portions of said cam assemblies is biased to one position and a push rod and actuator assembly is mounted alongside said linkage at an acute angle thereto, said push rod engaged with said linkage and adapted upon activation of said actuator to push said linkage in the direction overcoming said biasing means, I
  • said actuator being a fluid drive cylinder pivotally mounted at a pivot point fixed during operation, said rod engaging the linkage to permit rotation during lenghtening of the cylinder with the attendant change in angle between the push rod and the line of action of said linkage.
  • pivot point is formed by an adjustable member engaging said cylinder, thereby to change the position of said pivot point and alter the bottom position of the movable element.
  • a machine for forming bags from plastic film including an elongated forming surface adapted to be heated to a temperature sufficient to weld superposed palstic films together and means to move the forming surface in a predetermined path transverse to its length to an operative position against the film, and back therefrom to an inoperative position to allow advance of the plastic film
  • said elongated forming surface is defined by an elongated element flexible in the direction of said path, lacking selfsupport sufficient to maintain the proper geometry of said forming surface throughout its length, stationary structure extending along the length of said movable element and constructed and arranged to allow said motion, a multiplicity of drivers spaced apart along the length of said movable element, positioned at the middle as well as the ends thereof, each driver comprising a drive-force-receiving portion associated with said movable element and a cooperating drive-force applying portion positioned by stationary structure nd movable relative' thereto, each said driver adapted, upon movement of its force-applying portion, to position and
  • said drivers comprising cam assemblies, one of said portions of each assembly comprising a cam follower and the other of said portions comprising a cam surface engaged with said follower, said cam assemblies are mutually driven by a linkage follower, said cam assemblies are mutually driven by a linkage reciprocating in the direction parallel to the elongated element, said linkage including movable portions of said cam assemblies is biased to one position and a push rod and actuator assembly is mounted alongside said linkage at an acute angle thereto, said push rod engaged with said linkage and adapted upon activation of said actuator to push said linkage in the direction overcoming said biasing means,
  • said actuator being a fluid rotary actuator, said actuator mounted on supprting structure and said rod engaging said linkage and the rotary actuator through rotary joints to permit an attendant change in angle relative thereto during rotation of said actuator and reciprocation of said linkage.
  • Col. line 45, "352" should be -35l--;
  • Col.ll, line 43 after "drive", insert means for driving all of said force-applying portions of said drivers- Col. 1 line 24, "lengthening” is misspelled; Col l line .34, "81861116” is misspelled; Col. 1 6 "n line should be and-;

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Making Paper Articles (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Package Closures (AREA)
US3775225D 1971-07-06 1971-07-06 Machine for perforating and heat sealing a web including an elongated element with a multiplicity of drivers Expired - Lifetime US3775225A (en)

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US15999371A 1971-07-06 1971-07-06

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JP (1) JPS5544697B1 (enrdf_load_stackoverflow)
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DE (1) DE2233271A1 (enrdf_load_stackoverflow)
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US3940305A (en) * 1972-03-29 1976-02-24 Iwema Forpacknings Ab Tool for interconnecting sheet webs by welding
US4019947A (en) * 1975-09-10 1977-04-26 Fmc Corporation Multipurpose sealing and severing method and mechanism
US4358979A (en) * 1980-11-24 1982-11-16 Exxon Research & Engineering Co. Apparatus for cutting plastic film
WO1988000885A1 (en) * 1986-07-28 1988-02-11 Baxter Travenol Laboratories, Inc. Apparatus for sealing a web of film
JPS63100449U (enrdf_load_stackoverflow) * 1986-12-18 1988-06-29
US4872942A (en) * 1987-09-22 1989-10-10 Mobil Oil Corporation Seal bar including clamped seal element
US4909425A (en) * 1986-05-21 1990-03-20 Baxter International Inc. Guiding device for folded film
US4964944A (en) * 1986-07-28 1990-10-23 Baxter International Inc. Apparatus for sealing and severing a web of film
US4994137A (en) * 1988-07-14 1991-02-19 Nippon Flute Co., Ltd. Bag making machine sealer slitter apparatus
US5203950A (en) * 1988-05-11 1993-04-20 Ludy Spoelders Device for cutting according to a saw tooth pattern the extremities of veneer tapes between two pairs of upper and under knives
US5326416A (en) * 1992-04-15 1994-07-05 Du Pont Canada Inc. Heat sealing jaw assembly with film slackener
US5378304A (en) * 1993-12-09 1995-01-03 Doboy Packaging Machinery, Inc. Sealing machine having gap control between heat seal components
US5967961A (en) * 1997-05-02 1999-10-19 Fas Converting Machinery Ab Welding unit and bag-making machine with such a welding unit
US6145424A (en) * 1995-11-20 2000-11-14 Amada Company, Limited Punching machine and method thereof
US20030215956A1 (en) * 1998-10-29 2003-11-20 Reed Mark T. Multi-well microfiltration apparatus
US20040139701A1 (en) * 2003-01-16 2004-07-22 Cady Derril R. Bag sealing system and method
US20110000947A1 (en) * 2009-07-02 2011-01-06 Gamma Machinery Inc. Perforated Bag Separation Method and Apparatus
US20140130464A1 (en) * 2012-11-15 2014-05-15 Brother Kogyo Kabushiki Kaisha Packaging Device
CN104890054A (zh) * 2015-05-24 2015-09-09 浙江泰科节能材料有限公司 地热板开槽装置

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JPS58119246U (ja) * 1982-02-04 1983-08-13 日本電気株式会社 受信機の電源制御回路
JPS62233935A (ja) * 1986-04-03 1987-10-14 Furonteia Fuiirudo Prod:Kk 電池を電源とした間欠受信待機方式による無線制御の緊急通報装置
FR2607068B1 (fr) * 1986-11-24 1989-05-12 Fayard Ravel Ets Procede et dispositif pour fabriquer des sacs en matiere synthetique predecoupes et en bobine
CN109605476B (zh) * 2018-10-16 2021-02-23 河北新华欧亚汽配集团有限公司 一种改进的打孔机装置
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US3940305A (en) * 1972-03-29 1976-02-24 Iwema Forpacknings Ab Tool for interconnecting sheet webs by welding
US3912575A (en) * 1972-07-05 1975-10-14 Weldotron Corp Heat sealing apparatus using a wire sealing element
US3874976A (en) * 1973-02-02 1975-04-01 Computron Inc Gripper jaw assembly
US4019947A (en) * 1975-09-10 1977-04-26 Fmc Corporation Multipurpose sealing and severing method and mechanism
US4358979A (en) * 1980-11-24 1982-11-16 Exxon Research & Engineering Co. Apparatus for cutting plastic film
US4909425A (en) * 1986-05-21 1990-03-20 Baxter International Inc. Guiding device for folded film
US4761197A (en) * 1986-07-28 1988-08-02 Baxter Travenol Laboratories, Inc. Apparatus for sealing a web of film
WO1988000885A1 (en) * 1986-07-28 1988-02-11 Baxter Travenol Laboratories, Inc. Apparatus for sealing a web of film
US4964944A (en) * 1986-07-28 1990-10-23 Baxter International Inc. Apparatus for sealing and severing a web of film
JPS63100449U (enrdf_load_stackoverflow) * 1986-12-18 1988-06-29
US4872942A (en) * 1987-09-22 1989-10-10 Mobil Oil Corporation Seal bar including clamped seal element
US5203950A (en) * 1988-05-11 1993-04-20 Ludy Spoelders Device for cutting according to a saw tooth pattern the extremities of veneer tapes between two pairs of upper and under knives
US4994137A (en) * 1988-07-14 1991-02-19 Nippon Flute Co., Ltd. Bag making machine sealer slitter apparatus
US5326416A (en) * 1992-04-15 1994-07-05 Du Pont Canada Inc. Heat sealing jaw assembly with film slackener
US5378304A (en) * 1993-12-09 1995-01-03 Doboy Packaging Machinery, Inc. Sealing machine having gap control between heat seal components
US7131362B1 (en) * 1995-11-20 2006-11-07 Amada Company Limited Punching machine and method thereof
US6145424A (en) * 1995-11-20 2000-11-14 Amada Company, Limited Punching machine and method thereof
US5967961A (en) * 1997-05-02 1999-10-19 Fas Converting Machinery Ab Welding unit and bag-making machine with such a welding unit
US20030215956A1 (en) * 1998-10-29 2003-11-20 Reed Mark T. Multi-well microfiltration apparatus
US7328556B2 (en) 2003-01-16 2008-02-12 Taylor Sr Mark W Bag sealing system and method
US6862867B2 (en) * 2003-01-16 2005-03-08 Pack-Tech, L.L.C. Bag sealing system and method
US20040139701A1 (en) * 2003-01-16 2004-07-22 Cady Derril R. Bag sealing system and method
US20110138747A1 (en) * 2003-01-16 2011-06-16 Taylor Sr Mark W Bag sealing system and method
US8069637B2 (en) 2003-01-16 2011-12-06 Taylor Sr Mark W Bag sealing system and method
US20110000947A1 (en) * 2009-07-02 2011-01-06 Gamma Machinery Inc. Perforated Bag Separation Method and Apparatus
US20140130464A1 (en) * 2012-11-15 2014-05-15 Brother Kogyo Kabushiki Kaisha Packaging Device
US9434493B2 (en) * 2012-11-15 2016-09-06 Brother Kogyo Kabushiki Kaisha Packaging device
CN104890054A (zh) * 2015-05-24 2015-09-09 浙江泰科节能材料有限公司 地热板开槽装置

Also Published As

Publication number Publication date
GB1340642A (en) 1973-12-12
CA970192A (en) 1975-07-01
JPS5544697B1 (enrdf_load_stackoverflow) 1980-11-13
DE2233271A1 (de) 1973-01-18

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