{
  "$type": "site.standard.document",
  "description": "The device is in the form of a tube welded longitudinally and made of an aluminum alloy. A longitudinal weld seam can be produced without auxiliary tools and the alloy is naturally hardened. The wall thickness is 1.5 mm and the tube is shaped by drawing and expansion operations.",
  "path": "/patents/1109179",
  "publishedAt": "2001-10-17T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B21C37/08",
    "VAW ALUTUBES GMBH [DE]"
  ],
  "textContent": "The device is in the form of a tube welded longitudinally and made of an aluminum alloy. A longitudinal weld seam can be produced without auxiliary tools and the alloy is naturally hardened. The wall thickness is 1.5 mm and the tube is shaped by drawing and expansion operations.",
  "title": "Piston for rolling lobe air spring systems"
}