GB996411A - Improved method of heat sealing surfaces together - Google Patents

Improved method of heat sealing surfaces together

Info

Publication number
GB996411A
GB996411A GB36657/63A GB3665763A GB996411A GB 996411 A GB996411 A GB 996411A GB 36657/63 A GB36657/63 A GB 36657/63A GB 3665763 A GB3665763 A GB 3665763A GB 996411 A GB996411 A GB 996411A
Authority
GB
United Kingdom
Prior art keywords
loss factor
dielectric loss
box
thermoplastic material
substance
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
Application number
GB36657/63A
Inventor
Robert Leslie Agar
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.)
Mardon Son & Hall Ltd
Original Assignee
Mardon Son & Hall Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mardon Son & Hall Ltd filed Critical Mardon Son & Hall Ltd
Priority to GB36657/63A priority Critical patent/GB996411A/en
Publication of GB996411A publication Critical patent/GB996411A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B31B50/66—Uniting opposed surfaces or edges; Taping by applying heat or pressure, e.g. by welding by high-frequency electric heating
    • 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

Landscapes

  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

996,411. Seaming non-metallic sheet material. MARDON, SON & HALL Ltd. Sept. 4, 1964 [Sept. 18, 1963], No. 36657/63. Heading B5K. [Also in Division B8] Two surfaces of a box, one of which surfaces is coated with thermoplastic material having a low dielectric loss factor, are secured in face-toface relation by (a) either precoating the second surface with or interposing between the surfaces a substance having a high dielectric loss factor and compatible with the thermoplastic material, and (b) pressing the two surfaces together in a radio frequency field to heat the high loss factor substance and so plasticize the thermoplastic material to secure the surfaces together. The word " compatible " is used to mean that when the high dielectric loss factor substance and thermoplastic material are heated together, the molecules thereof readily integrate so that they flow as a single material. Low dielectric loss factor materials are those whose loss factor ranges from 0.0001 and 0.001, e.g. polytetrafluoroethylene, polypropylene, polystyrene and high and low density polyethylene, and high dielectric loss factor materials are those with a loss factor of 0.1 upwards, e.g. polyamide, polyvinylidene chloride and polyvinyl chloride. In an example, a box is made of a blank of cardboard one surface of which is coated with polyethylene and the other surface is coated with a high dielectric loss factor substance, e.g. a varnish. The body portion of the box is first folded up and heat-sealed by a plunger and die mechanism including electrodes of a radiofrequency circuit so that the polyethylene coating lies on the inside of the box. The article to be packed is deposited in the body and a lid hinged to the upper edge of one of the side walls is folded down. Panels hinged to the remaining three edges of the lid are folded down and secured to the corresponding walls of the body by radio-frequency heating during passage through a tunnel.
GB36657/63A 1963-09-18 1963-09-18 Improved method of heat sealing surfaces together Expired GB996411A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB36657/63A GB996411A (en) 1963-09-18 1963-09-18 Improved method of heat sealing surfaces together

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB36657/63A GB996411A (en) 1963-09-18 1963-09-18 Improved method of heat sealing surfaces together

Publications (1)

Publication Number Publication Date
GB996411A true GB996411A (en) 1965-06-30

Family

ID=10390086

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36657/63A Expired GB996411A (en) 1963-09-18 1963-09-18 Improved method of heat sealing surfaces together

Country Status (1)

Country Link
GB (1) GB996411A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0132191A2 (en) * 1983-07-18 1985-01-23 Dupuy Engineering S.A. (D.E.S.A.) Method of reinforcing cardboard boxes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0132191A2 (en) * 1983-07-18 1985-01-23 Dupuy Engineering S.A. (D.E.S.A.) Method of reinforcing cardboard boxes
FR2553028A1 (en) * 1983-07-18 1985-04-12 Dupuy Eng Sa PROCESS FOR STRENGTHENING BOXES
EP0132191A3 (en) * 1983-07-18 1986-01-29 Dupuy Engineering S.A. (D.E.S.A.) Method of reinforcing cardboard boxes

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