Magnetic tape cassette

{
  "publication_number": "US4869440A",
  "country": "US",
  "kind": "A",
  "title": "Magnetic tape cassette",
  "abstract": "The upper and lower cassette parts of a magnetic tape cassette are connected to each other by means of non-releasable fixtures, wherein a synthetic material bolt is introduced into at least one of the holes provided for screw connections according to the prior art. The bolt is provided with longitudinal ribs (8) or with an inner bore (9) or possesses a thread-like or saw tooth-like track (11) in the manner of a dowel (FIGS. 3a-3c).",
  "claims": [
    "1. A magnetic tape cassette comprising at least one magnetic tape roll within a two part housing consisting of a cover part fitted with several holes and a bottom part fitted with several corresponding recesses for receiving connecting means introducted into the holes in a manner no longer releasable characterised in that the connecting means is a synthetic bolt (3) fitted with a bolt head (10) which has no bore and wherein the bolt consists of the same material as the cover part (6) or bottom part (7) of the cassette and wherein said bolt has an outer circumference and longitudinal ribs are formed on the said outer circumference.",
    "2. A magnetic tape cassette comprising at least one magnetic tape roll within a two part housing consisting of a cover part fitted with several holes and a bottom part fitted with several corresponding recesses for receiving connecting means introducted into the holes in a manner no longer releasable characterised in that the connecting means is a synthetic bolt (3) fitted with a bolt head (10) which has no bore and wherein the bolt consists of the same material as the cover part (6) or bottom part (7) of the cassette and wherein said bolt has a shank and an internal bore is formed within said shank."
  ],
  "cpc": [
    "G11B 23/08785"
  ],
  "assignees": [
    "AGFA GEVAERT AG"
  ],
  "filing_date": "1988-03-31",
  "publication_date": "1989-09-26",
  "grant_date": "1989-09-26",
  "priority_date": "1987-04-10",
  "application_number": "US-17552488-A",
  "family_id": "6806919",
  "citations": [
    "DE2924453A1",
    "DE3305899A1",
    "FR2540276A1",
    "US2780128A",
    "US340692A",
    "US4097168A",
    "US4285265A",
    "US4349166A",
    "US4453634A",
    "US4566653A"
  ]
}