{
  "$type": "site.standard.document",
  "description": "In a method for manufacturing a battery safety valve according to the present invention, a stainless steel metal sheet is used, and an thin annular portion 3 constituting an edge portion of a safety valve 2 is formed in a lid 1 by simultaneously pressing annular projecting portions 23 provided…",
  "path": "/patents/979065",
  "publishedAt": "2014-02-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B21D51/383",
    "NISSHIN STEEL CO LTD [JP]"
  ],
  "textContent": "In a method for manufacturing a battery safety valve according to the present invention, a stainless steel metal sheet is used, and an thin annular portion 3 constituting an edge portion of a safety valve 2 is formed in a lid 1 by simultaneously pressing annular projecting portions 23 provided respectively on a punch 21 and a die 22 so as to oppose each other, against respective surfaces of the lid 1.",
  "title": "BATTERY SAFETY VALVE MANUFACTURING METHOD, BATTERY SAFETY VALVE MANUFACTURING DEVICE, BATTERY SAFETY VALVE, AND BATTERY CASE LID MANUFACTURING METHOD"
}