Dynamic information storage or retrieval – Storage medium structure – Adjuncts or adapters
Reexamination Certificate
1997-09-24
2001-09-18
Ometz, David L. (Department: 2652)
Dynamic information storage or retrieval
Storage medium structure
Adjuncts or adapters
C369S282000
Reexamination Certificate
active
06292461
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to disklike recording means of the hub chucking type so called, i.e. disklike recording means fixed to disk tables of recording/reproducing devices through center hubs mounted in center holes of recording-means main bodies.
FIGS. 29-30
show one of the known hub-chucking type disklike recording means. Referring to
FIGS. 29-30
, a disklike recording means
101
includes a main body
102
having a signal recording face and a center hub
103
mounted in a center hole
102
a
of the main body
102
.
The recording-means main body
102
is made of a rigid material such as synthetic resin or glass to be shaped like a disk having a center hole.
The center hub
103
is made of a magnetic metal plate such as iron plate to be shaped like a bottomed cylinder. The center hub
103
is formed with a flange
103
a.
The center hub
103
is mounted to the recording-means main body
102
by inserting the cylinder
103
b
connected to the flange
103
a
in the center hole
102
a
of the main body
102
, then joining the flange
103
a
to the upper side of the main body
102
by an adhesive
104
.
Referring to
FIG. 30
, when inserting the disklike recording means
101
into a recording/reproducing device, the center hub
103
is attracted by a magnet
202
arranged to a disk table
201
30
of the device, so that the disklike recording means
101
is chucked or held on a hub support face
203
of the disk table
201
.
However, due to its structure that the center hub
103
of a metal plate is joined to the recording-means main body
102
of a rigid material by the adhesive
104
, the known disklike recording means
101
produces the following inconveniences:
First, the recording-means main body
102
and the center hub
103
having different thermal expansion coefficients are firmly joined to each other by the adhesive
104
, so that when the disklike recording means
101
is exposed to an atmosphere of high temperature, the main body
102
will be warped or deformed due to the difference in the thermal expansion coefficient. With the disklike recording means
101
having high capacity based on high-density recording, such slight warp or deformation is sufficient to produce inconveniences such as inferior recording and reproducing.
Second, after solidification of the adhesive
104
, the mounting position of the center hub
103
with respect to the recording-means main body
102
is difficult to be corrected.
It is, therefore, an object of the present invention to provide disklike recording means which produce no warp or deformation in the recording-means main body due to temperature rise, etc., and ensure easy correction of the mounting position of the center hub with respect to the recording-means main body.
SUMMARY OF THE INVENTION
According to one aspect of the present invention, there is provided a disklike recording means adapted to a recording and reproducing device having a table, comprising:
a main body having a center hole; and
a center hub mounted in said center hole of said main body, said center hub including first and second components for holding first and second sides of said main body and means for connecting said first and second components, said center hub being magnetically chucked on the table.
Another aspect of the present invention lies in providing a disklike recording means adapted to a recording and reproducing device having a table, comprising:
a main body having a center hole;
a center hub mounted in said center hole of said main body, said center hub including first and second components for holding first and second sides of said main body and means for connecting said first and second components, said center hub being magnetically chucked on the table; and
means for ensuring contact between said main body and said center hub.
REFERENCES:
patent: 2694578 (1954-11-01), Smith
patent: 5657311 (1997-08-01), Takahashi
patent: 5949630 (1999-09-01), Yamamoto et al.
patent: 4-355253 (1992-12-01), None
Funawatari Takatsugu
Kikuchi Shuichi
Frommer William S.
Frommer Lawrence & Haug LLP.
Ometz David L.
Ryan Matthew K.
Sony Corporation
LandOfFree
Hub-chucking type disklike recording means does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hub-chucking type disklike recording means, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hub-chucking type disklike recording means will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2542269