GB2465778A - Portable heat sealing device - Google Patents

Portable heat sealing device Download PDF

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Publication number
GB2465778A
GB2465778A GB0821758A GB0821758A GB2465778A GB 2465778 A GB2465778 A GB 2465778A GB 0821758 A GB0821758 A GB 0821758A GB 0821758 A GB0821758 A GB 0821758A GB 2465778 A GB2465778 A GB 2465778A
Authority
GB
United Kingdom
Prior art keywords
base
heating element
heat sealing
sealing apparatus
upper case
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.)
Withdrawn
Application number
GB0821758A
Other versions
GB0821758D0 (en
Inventor
Daniel John Curley
James Cheney
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB0821758A priority Critical patent/GB2465778A/en
Publication of GB0821758D0 publication Critical patent/GB0821758D0/en
Publication of GB2465778A publication Critical patent/GB2465778A/en
Withdrawn legal-status Critical Current

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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
    • 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
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/229—Heated wire resistive ribbon, resistive band or resistive strip characterised by the means for tensioning said heated wire, resistive ribbon, resistive band or resistive strip
    • 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
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • 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
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • 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
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/221—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip
    • B29C65/224—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip being a resistive ribbon, a resistive band or a resistive strip
    • 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
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/228—Heated wire resistive ribbon, resistive band or resistive strip characterised by the means for electrically connecting the ends of said heated wire, resistive ribbon, resistive band or resistive strip
    • 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
    • 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
    • B29C66/003—Protecting areas of the parts to be joined from overheating
    • 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
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/8145—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81457—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a block or layer of deformable material, e.g. sponge, foam, rubber
    • 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
    • B29C66/8182—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 thermal insulating constructional aspects
    • B29C66/81821—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 thermal insulating constructional aspects of the welding 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
    • 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
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • 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
    • B29C66/8227—Transmission mechanisms using springs
    • 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
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8324—Joining or pressing tools pivoting around one axis
    • 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
    • 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
    • B29C66/861—Hand-held tools
    • B29C66/8618—Hand-held tools being battery operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
    • B65B51/146—Closing bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
    • B65B51/148—Hand-operated members
    • 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
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/221—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip
    • B29C65/222—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip comprising at least a single heated wire
    • 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
    • B29C66/812—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
    • B29C66/818—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0012—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular thermal properties
    • B29K2995/0015—Insulating
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Package Closures (AREA)

Abstract

A portable heat sealing device 1, used for sealing plastics bags in a domestic situation, has an elongated heating element 2, in the region of 10cm in length, such as to be capable of sealing the entirety of the mouth of a plastic bag, in a single step.

Description

PORTABLE HEAT SEALING APPARATUS
The present invention relates to portable heat sealing apparatus of the type commonly used as a kitchen appliance to seal small packages of thermoplastic material, typically "plastics bags" of polyethylene or polypropylene.
BACKGROUND OF THE INVENTION
Two or more sheets of such thermoplastic material are readily welded together by localised application of heat and pressure. The plastics material melts to form an airtight seal. However, the heating and pressure must be accurately controlled to provide a reliable seal. Thus, the temperature and pressure must be applied evenly and within predetermined values and for a sufficient length of time, but not too long.
Such parameters are readily controlled in large scale, industrial, stationary apparatus for production of plastics bags of all types and for sealing such bags after filling. The present invention is not, however, concerned with such apparatus.
The present invention is concerned with portable heat sealing apparatus which can be produced inexpensively for use as a domestic kitchen appliance, for example, for sealing bags filled with food produce at home, or for re-sealing bags after part of contents have been removed. Many devices of this type have been proposed. US 6,998,577 and US 7,291,810 disclose portable sealing devices which are designed to be handheld and gripped by a user to press a contact pad on a first portion towards a heated pad on a second portion, which is hingedly attached to the first portion, with the plastic bag to be sealed interposed between these pads. The pad which is heated and a heating element underlying this pad are only about 1 -2 cm in length. Most plastics bags need to be sealed over a longer distance and this is intended to be accomplished using these devices by sliding the heated pad and opposing contact pad along the relevant region of the bag to be sealed. However, to achieve an effective airtight seal the pressure and the temperature need to be maintained during such movement. Smooth and efficient operation of such devices is challenging for an unskilled user.
A longer heating element is desirable in order to heat and seal a greater length of the plastics bag in a single pressing operation without additional manipulation by the user.
Indeed, such is proposed in one embodiment of US 7,291,81 0. However, the reliability of the seal is then compromised because the heating element, typically a wire, slackens upon heating owing to expansion, and repeated heating and cooling results in a slack wire and an uneven wire path, in turn leading to gaps or weaknesses in the seal.
Sophisticated heating wire tensioning arrangements, as used in industrial heat sealing apparatus, is precluded by the requirement for low cost production of such portable devices.
It is also desirable that such portable heat sealing devices should be powered by batteries, but owing to inefficiencies in the design and operation of known devices of this type, the draw on available battery power tends to be high, resulting in unacceptably low battery life.
It is an object of the present invention to overcome these problems and to provide portable sealing apparatus which is simple to operate with reliable results in producing an effective airtight seal over an adequate length, and yet is inexpensive to produce.
It is a further object to produce such apparatus which can be battery operated, using either a disposable or re-chargeable battery or batteries, but has significantly increased battery life compared to previously known apparatus for the same purpose.
With these objects in view the invention provides a portable heat sealing apparatus comprising: a base and an upper case which is pivotally connected to the base; a heating module mounted in the base and comprising an elongate support, an elongate heating element overlying the support, and an elongate strip of heat resistant material overlying the element, the upper case having an elongate contact pad aligned to face the heating element and resiliently mounted so as to press an intervening substrate, such as sheets of plastics material, against the strip overlying the heating element in use of the apparatus, and electrical circuit means provided in the base and connecting to the heating element to supply power for heating said element, characterised in that the support, the heating element, the strip of heat resistant material and the contact pad are each at least 10cm in length, in that a respective heat insulating member is connected to each end of the heating element, in that a respective elastic element connects each heat insulating member to the base in order to hold the heating element taut at all times, and in that the electric circuit means connects to the heating element inboard the respective insulating members.
The heating element is preferably in the form of a wire made from any high resistance material which becomes hot when an electric current is passed through the wire.
Portable heat sealing apparatus in accordance with the invention is preferably battery powered. More specifically, in preferred practical embodiments the base is typically provided with a battery compartment and the electrical circuit means is adapted to supply power from a battery source in said compartment to the heating element.
Because battery operated heating devices place a very heavy demand upon the batteries it is particularly important to select a heater wire material which is the most efficient in that it has the lowest possible battery power demand to reach the required temperature to momentarily and locally melt the plastic sheet material, namely the plastic bag wall material. The most effective heater wire material has been found to be an alloy of iron, chromium and aluminium. A specific example of an alloy composition which is highly effective is 70% iron, 25% chromium and 5% aluminium.
As already mentioned, the repeated heating and cooling of the heater wire in use of the apparatus causes expansion and contraction of the length of the wire. It is important to counteract this and ensure that the wire is always kept straight and under slight tension in order to provide a reliable seal which is straight, even (without weaknesses) and without gaps. This also minimises the current draw and consumption of power from the batteries, thus ensuring maximum battery life.
The elastic members are provided for this purpose. Experiments have shown that the most favourable form for these elastic members is helical springs as these can most readily be mounted to provide a straight line pulling force on the heating wire and to maintain a pulling force on the wire at all times. In the compact format demanded by such a portable heating device as the present invention is concerned with, an alternative possibility is to use a torsion spring at each end, the torsion spring being wrapped around a capstan to which the heating wire is attached. Other forms of elastic member may also be adapted for use in other embodiments of the invention.
It is important that the heat generated in the heater wire it is not allowed to warm up the elastic members or, through the elastic members, to heat the body of the device, which is typically made of injection moulded plastics material. When springs are used as the elastic members heating adversely affects the metal of the spring, causing weakening.
Obviously, if the plastics material of the body is heated to any degree there is a risk of local melting or distortion. It is for this reason that heat insulating members are provided and the electric circuit means is connected to the heating element, namely the heater wire in preferred embodiments, at a location inwards of the heat insulating members which are connected to respective ends of the heating element.
Experiments have shown that for effectiveness in insulating properties, long operating life and cost effectiveness, the heat insulating members are preferably formed of ceramics material. The specific form of each insulating member is conveniently a unitary body having at least one aperture there though to facilitate attachment of the heating element on the one hand and the elastic member on the other hand. Most simple is a ceramic ring.
The electric circuit means can suitably be attached to the heater wire at locations in board of such ceramic rings, or other comparable insulating members, by heat tolerant conductors. Brass connectors crimped into position have been found to tolerate the heat and temperature changes over long periods of time and repeated use of the apparatus.
A safety switch to prevent inadvertent operation of the apparatus is a desirable feature and is provided in various forms in other known portable heat sealing devices.
In preferred embodiments of the portable heat sealing apparatus according to the present invention the upper case is pivotally connected to the base by a hinge connection which is spring biased to hold the upper case apart from the base when pressure is not applied manually to press the upper case onto the base, and the electrical circuit means includes a safety switch which permits supply of power to the heating element only when it is actuated. This can be achieved by the upper case including an activation rod positioned to engage and actuate the safety switch only when the upper case is pressed onto the base against spring bias.
The invention will be described further, by way of example, by reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a perspective view of a practical embodiment of a portable heating sealing apparatus in accordance with the present invention; Fig. 2 is an underside, rear, exploded perspective view of the portable heat sealing apparatus in Fig. 1; Fig. 3 is an exploded, underside, rear perspective view of the upper case of the portable heat sealing apparatus in Fig. 1; Fig. 4a is an exploded perspective view of the base and cover of the portable heat sealing apparatus in Fig. 1; Fig. 4b is an enlarged perspective view showing the heat insulating and tensioning arrangement at one end of the heater wire in the base of the portable heat sealing apparatus in Fig. 4a; Fig. 5 is an exploded perspective view of the heating module of the portable heat sealing apparatus in Fig. 4a; Fig. 6 is a perspective view from top and front of the base of the portable heat sealing apparatus in Fig. 4a; Fig. 7a is a circuit diagram of the power supply circuit of the portable heat sealing apparatus in Fig. 1 using a DC power source; Fig. 7b is a circuit diagram of an alternative power supply circuit using an AC power source as may be used in portable heat sealing apparatus similar to that in Fig. 1; Fig. 8 is an exploded perspective view showing a detachable holder for the portable heat sealing apparatus in Fig. 1; and Fig. 9 is an exploded bottom perspective view showing connectors mounted on the external underside of the base of the portable heat sealing apparatus in Fig. 1.
DETAILED DESCRIPTION OF ILLUSTRATED EMBODIMENT
With reference to the drawings, this exemplary practical embodiment of a portable heat sealing apparatus in accordance with the present invention is designed for sealing together overlying walls of plastics bags. It comprises a body 1, a heating module 2 (see figure 5), an upper case 3, electric circuit means for power supply (see figures 7a and 7b) and an optional hanger assembly 5 (see figures 8 and 9).
As shown in figures 1 and 4a, the body 1 comprises a base 10 and a cover 11.
With reference to figures 1 and 2, the base 10 is in the form of an elongate housing having two ends, a rear wall, a front wall, an open top and an underside surface. The base housing 10 also includes a heating module compartment 16 and a battery compartment 15, as best seen in figure 4a. The underside of the base 10 is provided with multiple transverse mounting slots 19, and at least one protruding lip 18 or both.
These are optional mounting arrangements for the base 10 as the apparatus may be optionally wall mounted in a manner commonly known for a wide variety of kitchen appliances.
A hole 12 for passage of an electrical cord may be provided in the rear wall of the base in the event that mains power supply is used for heating, as explained later.
Hinge recesses 13 are formed at each end of the base 10 and communicate with the rear wall. Each hinge recess 13 has an inner wall 131 parallel to the end wall and a mounting hole 132 which is formed through the inner wall 131 and aligns with the mounting hole 132 in the inner wall 131 of the other hinge recess 13.
As shown in figures 4a and 6, the heating module compartment 16 is elongate and formed in the base 10 adjacent the front wall. The battery compartment 15 is formed inside the base 10 adjacent the rear wall and has at least two contacts 151, a battery access hole 152 and a battery access panel 153. The battery access hole 152 is formed through the underside of the base 10 and communicates with the battery compartment 15. The battery access panel 152 is removably mounted in and closes the battery access hole 152.
As shown in figures 1 and 4a, the cover 11 is mounted on and closes the open top of the base 10. It is formed near its front edge with an elongate aperture 111 which corresponds in position to the heating module compartment 16 in the base 10. The cover 11 also has two hinge notches 113 formed respectively in its rear corners and corresponding to the respective hinge slots 13 in the base 10. An activation hole 112 is provided as an extension from one of the hinge slots 13. The position of this hole 112 overlies a safety switch 45, which is part of the electrical circuit means in the base 10.
With reference to figure 5 as well as figures 4a and 6, the heating module 2 is mounted longitudinally in the heating module compartment 16 of the base 10 and protrudes through the heating slot 111 in the cover 11. The heating module 2 comprises an elongate two component support 22, 23 of any suitable heat resistant, non-conductive material, a heating element 24 in the form of a resistance heater wire, two insulating members in the form of ceramic rings 25, two elastic elements 26 and an overlying sheet 21 of heat resistant material.
The lower support part 22 has a longitudinal ridge 221 and the upper support part 23 is mounted on this ridge 221. The heating element 24 generates heat when current passes through it. It is mounted longitudinally along the upper surface of the support part 23.
The preferred nature of the heater wire 24 has been described earlier in the specification. The ceramic rings 25 are connected to the respective ends of the heating element 24, as best shown in figure 4b. The elastic elements 26 are connected between the ends of the base 10 and the respective ceramic rings 25 to hold the heating element 24 taut (therefore straight) and securely upon the upper support 23.
The sheet 21 covers the heating element 24 and the upper support 23 so the heating element 24 will not burn a hole in a plastic bag being sealed by the heat sealing apparatus.
For practical purposes in providing a seal of reasonable length in a single press operation, the components 21 to 24 of the heating module 2 and the aperture 111 through which the module protrudes are at least 10cm in length, and an optimal length may be from 16cm to 17cm.
The importance of keeping the heater wire 24 under tension and straight for efficient operation of the device has been explained earlier in the specification. It has been found by experiment that the optimum load to be applied to the cold heater wire 24, when it is of 16cm to 17cm in length, is 500gm +1-20% in straight line alignment with the wire.
This is best achieved by using elastic elements 26 in the form of coil springs which in an efficient practical embodiment have a solid length of 5.5mm when compressed and a load of 500gm when extended to over 10mm.
With such a spring at each end of the wire 24, the total length change which can be accommodated is about 9mm (4.5mm at each end). As the maximum expected wire length change during each cycle of heating and cooling of a wire of this length and alloy composition (70% Fe, 25% Cr, 5% Al) is 4mm, the wire 24 is always held under tension, the tension ranging from 500gm when cold and shortest, as already mentioned, to 300gm when hot and longest.
The importance of the ceramic ring isolating members 25 in isolating and protecting the elastic elements, such as coil springs 26, from the heat of the heater wire 24 has been previously discussed, and the connection of the electric circuit to the wire 24 inwardly of the ceramic rings 25 is also a requirement for this. This can be achieved satisfactorily by connectors in the form of brass rings 27 (see figure 4b).
With reference to figures 1, 2 and 3, the upper case 3 is connected pivotally above the base 10. It carries an elongate contact pad 332, which is a strip of resilient material, and through this pad it serves to press a plastic bag against the correspondingly positioned sheet 21 projecting through the base cover 11 so the heating element 24 can heat and seal the plastic bag. The upper case 3 is generally rectangular in configuration, having an inner surface, two ends, a rear edge and a front edge. It comprises an activation rod 31, a mounting slot 32, a press 33 and two opposing hinge formations 34.
The activation rod 31 is formed on and protrudes down from the upper case 3 and corresponds to and presses the safety switch 17 when the upper case 3 is pressed against the base 10.
The mounting slot 32 is formed parallel to the front edge of the upper case 3 and corresponds in position to the heating module 2 of the base 10. The press 33 comprises the aforesaid contact pad 332 and a mounting frame 331 for the pad, as shown in figure 3. The contact pad 332 is a strip of resilient material, which is mounted securely in the mounting slot 32 and has two exposed surfaces, namely a recessed outer surface and a protruding central surface. The protruding central surface serves in operation of the device to press a plastic bag against the heat resistant sheet 21 to ensure a smooth and efficient seal.
The mounting frame 331 is a strip of stiff insulating material, which has a central longitudinal through hole 334 corresponding to the protruding central surface of the contact pad 332. It is mounted in the mounting slot 32 over the recessed surface of the contact pad 332 and surrounding the protruding central surface and holds the press 33 securely in the mounting slot 32.
The opposing hinge formations 34 are at respective ends at the rear edge of the upper case 3. They correspond to and are mounted pivotally in the respective hinge slots 13 on the base 10. In this regard each hinge formation 34 has a lead edge 341 which protrudes down from the inner surface of the upper case 3 and corresponds to and is mounted pivotally in the corresponding hinge slot 13 in the base 10. Also each hinge formation 34 has a pintle 342 which is mounted rotatably in the mounting hole 132 in the corresponding hinge slot 13 with a resilient element 343 such as a torsion spring mounted around the pintle 342 to keep the upper case 3 from resting against the base by upward bias.
With reference to figures 6 and 7a, the electric circuit means designated by reference numeral 4 provides DC power to electrical components of the portable heat sealing apparatus and comprises at least one optional battery 41, a circuit board, an enabling switch 44, a safety switch 45 and a visual indicator 46 (such as an LED).
The at least one battery 41 is mounted in the battery compartment 15, connects to the contacts 151 in the battery compartment 15, is removable and provides DC power to operate the portable heat sealing apparatus.
The circuit board is mounted in the base 10 and connects electrical components of the portable heat sealing apparatus to a DC power source.
The enabling switch 44 is mounted inside the base 10, protrudes through the outer surface and it serves as a basic on/off switch for power supply to operate the portable heat sealing apparatus.
The device will operate satisfactorily with disposable, single use batteries of conventional alkaline type. AA size batteries may be required. These may be sufficient to accomplish 300 sealing operations as long as the other preferred features and materials are used.
Development of even more efficient use with rechargeable batteries, particularly rechargeable sealed lead/acid batteries is possible.
An alternative electrical circuit which allows the option of battery use mains power supply to the portable heat sealing device is shown in figure 7b. Compared to the figure 7a circuit this additionally includes a rectifier 43 and a selection switch. An electric cord, which will extend through the electrical cord hole 12 in the rear wall of the body 10, will connect the rectifier 43 to an external AC power source. The rectifier 43 converts AC power to DC power. The selector switch is mounted in the base 10 and is used to select either the at least one battery 41 or the rectifier 43 as the DC power source.
The safety switch 45, which is typically a microswitch, is mounted in the base 10 adjacent to one end of the base 10 below the activation hole 112. It is connected electrically to the enabling switch 43. DC power is provided to the heating module 2 when the enabling switch 44 is closed and the upper module 3 is pressed toward the base 10 so that the activation rod 31 projects through the hole 12 and presses the safety switch 45.
The visual indicator 46 is connected in parallel with the heating element 24 and shines when the portable heat sealing apparatus is operating. It is mounted inside the base 10 and protrudes through the outer surface.
The hanger assembly 5 shown in figures 8 and 9 allows the portable heating sealing apparatus to be detachably mounted securely on a smooth surface and comprises a hanger panel 50 and at least one wall connector 60 or multiple suction cups 70.
The hanger panel 50 attaches to a vertical surface and to the underside of the base 10.
It has a contact surface, an exposed surface and multiple optional hooks 51, at least one optional stationary hanger 52 or both. The hooks 51 are formed on and protrude from the exposed surface of the hanger panel 50 and are engaged respectively by the transverse slots 19 of the base 10 to securely hold the portable heat sealing apparatus.
The at least one stationary hanger 52 is formed on and protrudes from the exposed surface of the hanger panel 50 and is complementary to and engaged by the at least one hanging lip 18 on the base 10.
The at least one wall connector 60 connects the hanger panel 50 to a vertical surface, is connected securely to the contact surface of the hanger panel 50 and may be two-sided pressure tape, a magnet or the like.
The suction cups 70 are mounted detachably in the respective transverse slots 19 in the underside of the base 10.
People skilled in the art will understand that various changes, modifications and alterations in form and detail may be made without departing from the spirit and scope of the invention.

Claims (8)

  1. CLAIMS1. A portable heat sealing apparatus comprising: a base and an upper case which is pivotally connected to the base, a heating module mounted in the base and comprising an elongate support, an elongate heating element overlying the support, and an elongate strip of heat resistant material overlying the element, the upper case having an elongate contact pad aligned to face the heating element and resiliently mounted so as to press an intervening substrate, such as sheets of plastics material, against the strip overlying the heating element in use of the apparatus, and electrical circuit means provided in the base and connecting to the heating element to supply power for heating said element, characterised in that the support, the heating element, the strip of heat resistant material and the contact pad are each at least 10cm in length, in that a respective heat insulating member is connected to each end of the heating element, in that a respective elastic element connects each heat insulating member to the base in order to hold the heating element taut at all times, and in that the electric circuit means connects to the heating element inboard the respective insulating members.
  2. 2. A portable heat sealing apparatus according to claim 1 wherein the heat insulating members are formed of ceramics material.
  3. 3. A portable heat sealing apparatus according to claim 1 or claim 2 wherein each heat insulating member comprises a unitary body having at least one aperture there though,
  4. 4. A portable heat sealing apparatus according to claim 1 or claim 2 wherein each heat insulating member comprises a ceramic ring.
  5. 5. A portable heat sealing apparatus according to any preceding claim wherein the elastic members comprise helical tension springs.
  6. 6. A portable heat sealing apparatus according to any preceding claim wherein the base is provided with a battery compartment and the electrical circuit means is adapted to supply power from a battery source in said compartment to the heating element.
  7. 7. A portable heat sealing apparatus according to any preceding claim wherein the upper case is pivotally connected to the base by a hinge connection which is spring biased to hold the upper case apart from the base when pressure is not applied manually to press the upper case onto the base, wherein the electrical circuit means includes a safety switch which permits supply of power to the heating element only when it is actuated, and wherein the upper case includes an activation rod positioned to engage and actuate the safety switch only when the upper case is pressed onto the base against spring bias.
  8. 8. A portable heat sealing apparatus substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
GB0821758A 2008-11-28 2008-11-28 Portable heat sealing device Withdrawn GB2465778A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2738509C1 (en) * 2020-06-25 2020-12-14 Илья Анатольевич Калюжный Device for harpoon ends fastening during stretch ceilings fabrication

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GB1208744A (en) * 1967-12-02 1970-10-14 Parnall & Sons Ltd Improvements relating to heating devices
US3847712A (en) * 1972-08-14 1974-11-12 Dazey Prod Co Bag sealing apparatus
US3867226A (en) * 1971-11-24 1975-02-18 Joseph J Guido Method for sealing plastic bags
US4289566A (en) * 1978-05-20 1981-09-15 Bosch Siemens Hausgerate Gmbh Device for heat-sealing and/or cutting of thin foils of synthetic materials
DE3112230A1 (en) * 1981-03-27 1982-10-28 Süddeutsche Elektro-Hausgeräte GmbH & Co KG, 8000 München Domestic welding device
DE3312781A1 (en) * 1983-04-09 1984-10-11 Robert Krups Stiftung & Co KG, 5650 Solingen Film welding unit for domestic film bags
FR2673142A1 (en) * 1991-02-21 1992-08-28 Ribal Annick Portable self-contained (autonomous) welding device for plastic bags
GB2275442A (en) * 1993-02-25 1994-08-31 Kwonnie Electrical Products Lt Vacuum sealing plastics bags
FR2711614A1 (en) * 1993-10-26 1995-05-05 Paviot Papiers A Apparatus for closing bags by means of heat welding
US6392198B1 (en) * 2001-07-13 2002-05-21 San-Ho Yao Sealing machine of clip type
US20040144766A1 (en) * 2003-01-24 2004-07-29 Welcome Co., Ltd. Electric heat sealer
GB2403180A (en) * 2003-06-25 2004-12-29 Ammy Chou Hand held sealing device with detachable power unit
US6998577B2 (en) * 1997-08-26 2006-02-14 Welcome Co., Ltd. Table-top electric heat sealer

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1208744A (en) * 1967-12-02 1970-10-14 Parnall & Sons Ltd Improvements relating to heating devices
US3867226A (en) * 1971-11-24 1975-02-18 Joseph J Guido Method for sealing plastic bags
US3847712A (en) * 1972-08-14 1974-11-12 Dazey Prod Co Bag sealing apparatus
US4289566A (en) * 1978-05-20 1981-09-15 Bosch Siemens Hausgerate Gmbh Device for heat-sealing and/or cutting of thin foils of synthetic materials
DE3112230A1 (en) * 1981-03-27 1982-10-28 Süddeutsche Elektro-Hausgeräte GmbH & Co KG, 8000 München Domestic welding device
DE3312781A1 (en) * 1983-04-09 1984-10-11 Robert Krups Stiftung & Co KG, 5650 Solingen Film welding unit for domestic film bags
FR2673142A1 (en) * 1991-02-21 1992-08-28 Ribal Annick Portable self-contained (autonomous) welding device for plastic bags
GB2275442A (en) * 1993-02-25 1994-08-31 Kwonnie Electrical Products Lt Vacuum sealing plastics bags
FR2711614A1 (en) * 1993-10-26 1995-05-05 Paviot Papiers A Apparatus for closing bags by means of heat welding
US6998577B2 (en) * 1997-08-26 2006-02-14 Welcome Co., Ltd. Table-top electric heat sealer
US6392198B1 (en) * 2001-07-13 2002-05-21 San-Ho Yao Sealing machine of clip type
US20040144766A1 (en) * 2003-01-24 2004-07-29 Welcome Co., Ltd. Electric heat sealer
GB2403180A (en) * 2003-06-25 2004-12-29 Ammy Chou Hand held sealing device with detachable power unit

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2738509C1 (en) * 2020-06-25 2020-12-14 Илья Анатольевич Калюжный Device for harpoon ends fastening during stretch ceilings fabrication

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