JPS57133024A - Manufacture of plastic bag - Google Patents

Manufacture of plastic bag

Info

Publication number
JPS57133024A
JPS57133024A JP1805581A JP1805581A JPS57133024A JP S57133024 A JPS57133024 A JP S57133024A JP 1805581 A JP1805581 A JP 1805581A JP 1805581 A JP1805581 A JP 1805581A JP S57133024 A JPS57133024 A JP S57133024A
Authority
JP
Japan
Prior art keywords
long
longitudinal direction
shaped portion
central longitudinal
central
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.)
Pending
Application number
JP1805581A
Other languages
Japanese (ja)
Inventor
Kazunori Yamagata
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.)
Yamagata Gravure Co Ltd
Original Assignee
Yamagata Gravure Co 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 Yamagata Gravure Co Ltd filed Critical Yamagata Gravure Co Ltd
Priority to JP1805581A priority Critical patent/JPS57133024A/en
Publication of JPS57133024A publication Critical patent/JPS57133024A/en
Pending 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B31B70/645—Making seals transversally to the direction of movement
    • 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
    • B31B2160/00—Shape of flexible containers
    • B31B2160/20—Shape of flexible containers with structural provision for thickness of contents

Landscapes

  • Making Paper Articles (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To obtain a plastic bag by a method in which a bottom reinforcing material is fixed along the central longitudinal direction of a long plastic film, a fold of a W-shaped cross section is formed along the central longitudinal direction, and weld sealing is made at proper intervals while sending out a bond preventive means at the center of the W-shaped portion. CONSTITUTION:A long plastic sheet 2 serving as a bottom reinforcing material for a bag is fixed along the central longitudinal direction of a long plastic film 1, and a 4-ply fold of a W-shaped cross section is formed along the central longitudinal direction in such a way that the long central line of the long sheet is matched with the central top of the W-shaped portion 5 and both sides of the long sheet are positioned at two bottom points of the W-shaped portion. And, weld sealing 6 is made at fixed intervals while sending out bond preventive means 3 and 4 formed on the surface facing the center of the W-shaped portion 5.
JP1805581A 1981-02-12 1981-02-12 Manufacture of plastic bag Pending JPS57133024A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1805581A JPS57133024A (en) 1981-02-12 1981-02-12 Manufacture of plastic bag

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1805581A JPS57133024A (en) 1981-02-12 1981-02-12 Manufacture of plastic bag

Publications (1)

Publication Number Publication Date
JPS57133024A true JPS57133024A (en) 1982-08-17

Family

ID=11961006

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1805581A Pending JPS57133024A (en) 1981-02-12 1981-02-12 Manufacture of plastic bag

Country Status (1)

Country Link
JP (1) JPS57133024A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4830592A (en) * 1971-08-19 1973-04-21

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4830592A (en) * 1971-08-19 1973-04-21

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