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US 7,031,112 B2Granted
Method of processing metal plate member of disc cartridge
AssigneeFuji Photo Film Co., Ltd.
InventorHarumi Aoishi
Life of this patent
Estimating the term…
Abstract
A magnetic disc is housed for rotation in a flat casing having a metal shell. The magnetic disc is supported for rotation in the casing by a tubular shaft formed by barring of a metal blank for forming the metal shell. A hole is formed in a part of the metal blank where the tubular shaft is to be formed. A plurality of slits are formed prior to barring in the part where the tubular shaft is to be formed.
Claims5
A method of carrying out plastic processing, comprising:
- stretching a metal shell of a disc cartridge or another metal plate member of the metal shell, and
- forming a slit, prior to stretching, in a part of the metal shell or the other metal plate member on which the plastic processing is to be carried out,
- wherein the disc cartridge comprises a magnetic disc housed for rotation in a flat casing.
A disc cartridge comprising.
- a magnetic disc housed for rotation in a flat casing having a metal shell, the housing being provided with an opening for giving access to the magnetic disc housed therein to a recording/reproducing head of a drive system;
- and
- a rotary shutter being mounted for rotation on the metal shell to open and close the opening,
- wherein, the rotary shutter is supported for rotation on the metal shell by way of a tubular shaft which is formed on the metal shell by barring and is provided with a slit in a free end portion thereof.
1 more element
Dependencies are inferred from the claim text.