Cutting – Other than completely through work thickness or through work... – Scoring
Reexamination Certificate
1998-04-22
2002-10-29
Dexter, Clark F. (Department: 3724)
Cutting
Other than completely through work thickness or through work...
Scoring
C083S861000, C030S164900, C033S030300
Reexamination Certificate
active
06470782
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a scribe process and a scribe device for forming a scribe line on a surface of a workpiece of a hard material such as a sheet glass, or the like.
In general, in case a workpiece such as a sheet glass or the like is caused to be fracture, a scribe line is preliminarily formed on the surface of the workpiece and the workpiece is caused to be fracture along this scribe line. A conventional scribe device used for forming such a scribe line is disclosed, for example, in Japanese Utility Model Unexamined Publication No. Hei 1-110234. Specifically, as shown in
FIGS. 22A and 22B
, the conventional scribe device comprises a disc-shaped cutter
90
(abutment member) with a sharpened peripheral edge, a holder
91
rotatably supporting the cutter
90
, and a pressing/moving mechanism (not shown) for pressing the cutter
90
against a surface of a sheet glass
100
(workpiece) through the holder
91
and moving the cutter
90
along the surface of the sheet glass
100
.
A scribe line
105
is formed by moving the cutter
90
pressed against the sheet glass
100
as described above. The scribe line
105
includes, as shown in
FIG. 22A
, an edge entry portion
105
a
, a rib mark
105
b
, and a vertical crack
105
c
. In order to facilitate a fracture of the sheet glass
100
, it is necessary to form the vertical crack
105
c
deeply. For this purpose, it suffices that the force for pressing the cutter
90
against the sheet glass
100
is increased. However, if the cutter
90
is pressed against the sheet glass
100
with an increased pressing force, there is a possibility that the scribe line
105
including not only the vertical crack
105
c
but also a horizontal crack
106
extending leftwardly and rightwardly from the scribe line
105
tend to occur as shown in
FIG. 22B
, thus unfavorably resulting in a cut, a peel-off, or the like formed in the vicinity of the scribe line
105
due to the horizontal crack
106
.
In contrast, if the force for pressing the cutter
90
against the sheet glass
100
is decreased, the horizontal crack
106
does not occur but a sufficiently large depth of the vertical crack
105
c
becomes unobtainable. This means that the intended favorable fracture of the sheet glass
100
is unobtainable.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a scribe device capable of forming a deep and beautiful scribe line.
The subject matter of the present invention resides in a scribe process for scribing a surface of a workpiece by applying vibrations to the workpiece while pressing an abutment member against the surface of the workpiece.
In a device for carrying our this process, a holder is supported by a body such that the holder can slightly slide in a direction of a slide axis which intersects a surface of a workpiece. Retainer portions spaced apart in the direction of the slide axis are each formed on the body and the holder, respectively. A vibratory actuator is sandwiched between the retainer portion of the body and the retainer portion of the holder. The holder holds an abutment member, The holder is biased by a biasing member such that the retainer portion of the holder is pressed against the vibratory actuator. The vibratory actuator renders vibrations in the direction of the slide axis to the holder. The abutment member transmits the vibrations from the holder to the workpiece. When the body or the workpiece is moved, either manually or by a moving mechanism, relative to each other in that state, a scribe line is formed.
In a modified device, the body is attached with an elastic arm and an abutment member is attached to a distal end portion of the elastic arm. Vibrations of a vibratory actuator are transmitted to the abutment member through the elastic arm.
REFERENCES:
patent: 2467083 (1949-04-01), Francis, Jr.
patent: 3122953 (1964-03-01), Atkeson
patent: 3157329 (1964-11-01), De Gorter
patent: 3681627 (1972-08-01), Murry et al.
patent: 4420106 (1983-12-01), Hyatt
patent: 4589194 (1986-05-01), Roy
patent: 5038654 (1991-08-01), Mackey
patent: 5195410 (1993-03-01), Young
patent: 5512808 (1996-04-01), Clark, Jr. et al.
patent: 5820006 (1998-10-01), Turner
patent: 6021574 (2000-02-01), Murray, III
patent: 809 977 (1959-03-01), None
patent: 1-110234 (1989-07-01), None
patent: 07164400 (1995-06-01), None
patent: 8-225332 (1996-09-01), None
patent: 8-325026 (1996-12-01), None
patent: 9-25134 (1997-01-01), None
patent: 9-269773 (1997-10-01), None
patent: 9-278473 (1997-10-01), None
Shimotoyodome Gyo
Sugiura Isao
Beldex Corporation
Dexter Clark F.
Fish & Richardson P.C.
LandOfFree
Scribe device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Scribe device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scribe device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2955989