Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record
Reexamination Certificate
2000-03-24
2004-01-27
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the record
C360S075000, C242S332100
Reexamination Certificate
active
06683741
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention generally relates to magnetic-tape devices, and particularly relates to a magnetic-tape device which writes data in and reads data from a magnetic-tape cartridge by attending to thread control.
2. Description of the Related Art
Conventionally used data recording devices include magnetic-tape devices, which use a magnetic-tape cartridge that can record data by utilizing a magnetic recording scheme. Such magnetic-tape devices are typically used for recording a large size of data.
FIG. 19
is an illustrative drawing showing a related-art magnetic-tape device including a magnetic-tape cartridge.
A magnetic-tape device
1
includes a magnetic-tape cartridge
2
, a machine reel
3
, a leader block
4
, a threader motor
5
, roller guides
6
, cleaners
7
, a head
8
, a magnetic tape
9
, and a threader pin
10
.
The magnetic-tape cartridge
2
can be detached from the magnetic-tape device
1
for replacement.
In
FIG. 19
, the magnetic tape
9
of the magnetic-tape cartridge
2
is hooked around the roller guides
6
and the cleaners
7
to come in contact with the head
8
, and the leader block
4
is placed in a threaded position, being positioned inside the machine reel
3
. The leader block
4
is fixed to the threader pin
10
, and is led out from the magnetic-tape cartridge
2
to be threaded under the control of the threader motor
5
. In this condition, the head
8
records data in and reproduces data from the magnetic tape.
FIGS. 20A and 20B
are illustrative drawings showing an example of a magnetic-tape cartridge of an old type.
FIG. 20A
illustrates a front side of the magnetic-tape cartridge along with a leader-block portion
20
′ which is used for fixing the leader block
4
to the threader pin
10
.
FIG. 20B
illustrates a back side of the magnetic-tape cartridge where no slits are provided at portions
21
′.
FIGS. 20C and 20D
are illustrative drawings showing an example of a magnetic-tape cartridge.
FIGS. 20C and 20D
show a magnetic-tape cartridge
2
of a new type having a magnetic tape of a standard length.
FIG. 20C
illustrates a front side of the magnetic-tape cartridge along with a leader-block portion
20
which is used for fixing the leader block
4
to the threader pin
10
.
FIG. 20D
illustrates a back side of the magnetic-tape cartridge where cartridge identifying slits
21
are provided to indicate a difference of cartridge type.
FIGS. 21A and 21B
are illustrative drawings showing an example of a magnetic-tape cartridge.
FIGS. 21A and 21B
show a magnetic-tape cartridge
2
of a new type having a magnetic tape of a double length.
FIG. 21A
illustrates a front side of the magnetic-tape cartridge along with a leader-block portion
22
which is used for fixing the leader block
4
to the threader pin
10
.
FIG. 21B
illustrates a back side of the magnetic-tape cartridge where cartridge identifying slits
23
are provided to indicate a difference of cartridge type.
Among those magnetic-tape cartridges illustrated above, those of the new type are identical to each other in the shape of part of the leader-block portion that comes in contact with the threader pin, but differ from each other in positions of the cartridge identifying slits. The magnetic-tape cartridge of the old type has the leader-block portion
20
′ that is different from the leader-block portion
20
or
22
of the new-type magnetic-tape cartridge in terms of the shape of a portion that comes in contact with the threader pin, and does not have slits at the portions
21
′.
FIG. 22
is an illustrative drawing showing the magnetic-tape cartridge
2
.
In
FIG. 22
, the magnetic-tape cartridge
2
includes the magnetic tape
9
wrapped around a reel
24
and the leader block
4
attached to the beginning of the magnetic tape
9
.
The leader-block portion
20
,
20
′, or
22
includes the leader block
4
, which receives the threader pin
10
in a recess thereof. When the leader block
4
is fixed to the threader pin
10
, the leader block
4
is taken out from the leader-block portion
20
,
20
′, or
22
to be threaded to the magnetic-tape device
1
.
FIG. 23
is an illustrative drawing showing an example of the leader-block portion
20
′ of the old magnetic-tape cartridge shown in
FIGS. 20A and 20B
.
In
FIG. 23
, a threader pin
100
connected to a tip of a threader arm
11
has a pin head
13
attached thereto which is to be fixed to the leader block
40
. The pin head
13
is comprised of a cylinder shape and a corn shape attached at the tip of the threader pin
100
. The leader block
40
has a recess
12
that receives therein the pin head
13
. The leader block
40
has a lower portion thereof cut off at a position where the recess
12
is formed. In the case of
FIG. 23
, the pin head
13
can be securely fixed to the recess
12
of the leader block
40
as the cylinder shape of the pin head
13
provides a secure fit. Accordingly, appropriate threading is possible in the old magnetic-tape cartridge.
FIG. 24
is an illustrative drawing showing an example of the leader-block portion
20
or
22
of the new magnetic-tape cartridge shown in
FIGS. 20C and 20D
or
FIGS. 21A and 21B
.
In
FIG. 24
, the threader pin
100
connected to a tip of the threader arm
11
has the pin head
13
attached thereto which is to be fixed to a leader block
41
. The pin head
13
is comprised of a cylinder shape and a corn shape attached at the tip of the threader pin
100
. The leader block
41
has a recess
14
that receives therein the pin head
13
. The leader block
41
has a lower portion thereof scraped off from an inner surface of the recess
14
, and has a front side facing the view of
FIG. 24
missing at a position where the recess
14
is provided. In the case of
FIG. 24
, therefore, the pin head
13
cannot be securely fixed to the recess
14
of the leader block
41
. Accordingly, appropriate threading is impossible in the new magnetic-tape cartridge.
FIG. 25
is an illustrative drawing showing the leader-block portion
20
′ of the old magnetic-tape cartridge of
FIGS. 20A and 20B
in a different arrangement.
In
FIG. 25
, a threader pin
101
connected to a tip of the threader arm
11
has a pin head
15
attached thereto which is to be fixed to the leader block
40
. The pin head
15
is comprised of a corn shape and a cylinder shape attached to the corn shape toward the tip of the threader pin
101
. The leader block
40
has the recess
12
that receives therein the pin head
15
. The leader block
40
has a lower portion thereof cut off at a position where the recess
12
is formed. In the case of
FIG. 25
, therefore, the pin head
15
cannot be fixed to the recess
12
of the leader block
40
. Accordingly, appropriate threading is not possible in the old magnetic-tape cartridge.
FIG. 26
is an illustrative drawing showing the leader-block portion
20
or
22
of the new magnetic-tape cartridge of
FIGS. 20C and 20D
or
FIGS. 21A and 21B
in a different arrangement.
In
FIG. 26
, the threader pin
101
connected to a tip of the threader arm
11
has the pin head
15
attached thereto which is to be fixed to the leader block
41
. The pin head
15
is the same as the one shown in FIG.
25
. The leader block
41
has the recess
14
that receives therein the pin head
15
. The leader block
41
has a lower portion thereof scraped off from an inner surface of the recess
14
, and has a front side facing the view of
FIG. 26
missing at a position where the recess
14
is provided. In the case of
FIG. 26
, the pin head
15
can be securely fixed through secure contact between the lower inner surface of the recess
14
and the cylinder shape portion of the pin head
15
. Accordingly, appropriate threading is possible in the new magnetic-tape cartridge.
In the manner as described above, it depends on a type of a magnetic-tape cartridge whether the recess of the leader block
4
can be securely fixed to the pin head. When a secure fix cannot be provided, the ma
Kobayashi Masayoshi
Oohara Tsuneyoshi
Sakaguchi Masahiko
Fujitsu Limited
Greer Burns & Crain Ltd.
Olson Jason
LandOfFree
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