JPS57175034A - Forming method of tearing way opening piece of can - Google Patents

Forming method of tearing way opening piece of can

Info

Publication number
JPS57175034A
JPS57175034A JP5796381A JP5796381A JPS57175034A JP S57175034 A JPS57175034 A JP S57175034A JP 5796381 A JP5796381 A JP 5796381A JP 5796381 A JP5796381 A JP 5796381A JP S57175034 A JPS57175034 A JP S57175034A
Authority
JP
Japan
Prior art keywords
opening piece
groove
cover body
piece
thin
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
JP5796381A
Other languages
Japanese (ja)
Inventor
Keiji Taniuchi
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
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 Individual filed Critical Individual
Priority to JP5796381A priority Critical patent/JPS57175034A/en
Publication of JPS57175034A publication Critical patent/JPS57175034A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/383—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)

Abstract

PURPOSE:To easily tear an opening piece, by forming a thin opening piece for pinching an important part of a can body and making it project downward, and a gnawed groove, subsequently, bending it upward, and constituting so that a plate between a cut guide groove and the gnawed groove becomes thin. CONSTITUTION:On a lower mold 6, a hollowed seat 8 whose inside circumference has been formed to a downward tapered surface 7 is provided, and on the upper surface circumferential edge of the hollowed seat 8, a projecting streak 9 is provided. A projecting part 14 whose tapered surface 12 and lower surface 13 have been flattened is provided on an upper mold 10, too. An iron plate material is pinch-pressed by both these molds 6, 10, a part of a cover body 1 is projected downward, and a gnawed groove 16 is formed on a dish-like opening piece 2 having a thin consecutive piece 15 which is evolutely inclined downward, on the circumferential edge part, and its lower surface circumferential edge part. This cover body 1 is pressed by use of other molds 21, 23, the cover body 1 and the upper surface of the opening piece 2 are set on the same plane, the thin consecutive piece 15 is bent so as to have a V-section, in a hollowed groove 19 of the lower mold 21, and a cut guide groove 5 having a V-section is formed between the upper surface of the cover body 1 and the upper surface of the opening piece 2.
JP5796381A 1981-04-17 1981-04-17 Forming method of tearing way opening piece of can Pending JPS57175034A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5796381A JPS57175034A (en) 1981-04-17 1981-04-17 Forming method of tearing way opening piece of can

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5796381A JPS57175034A (en) 1981-04-17 1981-04-17 Forming method of tearing way opening piece of can

Publications (1)

Publication Number Publication Date
JPS57175034A true JPS57175034A (en) 1982-10-27

Family

ID=13070660

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5796381A Pending JPS57175034A (en) 1981-04-17 1981-04-17 Forming method of tearing way opening piece of can

Country Status (1)

Country Link
JP (1) JPS57175034A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987001628A1 (en) * 1985-09-17 1987-03-26 Keiji Taniuchi Method of forming tearing portion in container lid
US5348809A (en) * 1991-11-08 1994-09-20 Nippon Steel Corporation Sheet steel easy open can lid superior in can openability and not requiring repair coating of inner and outer surfaces

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987001628A1 (en) * 1985-09-17 1987-03-26 Keiji Taniuchi Method of forming tearing portion in container lid
US5348809A (en) * 1991-11-08 1994-09-20 Nippon Steel Corporation Sheet steel easy open can lid superior in can openability and not requiring repair coating of inner and outer surfaces

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