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 the 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 involving stretching on a metal shell of a disc cartridge comprising a magnetic disc housed for rotation in a flat casing having the metal shell or on another metal plate member of the metal shell, wherein the improvement comprises the step of
- forming a slit in advance in a part on which the plastic processing is to be carried out.
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 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 the free end portion thereof.
Dependencies are inferred from the claim text.