Printing – Embossing or penetrating – Processes
Reexamination Certificate
2000-09-14
2003-09-09
Hirshfeld, Andrew H. (Department: 2854)
Printing
Embossing or penetrating
Processes
C101S034000
Reexamination Certificate
active
06615713
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a bar code forming method by which the bar code is formed on a resin substrate by a hot stamping die, and to an APS film cartridge on which a bar code is formed.
In a photographic film cartridge according to the standard of the advanced photo system (hereinafter, called APS film cartridge), the photographic film is wound around a resin spool, and covered by a resin film magazine. On one end of this spool, a data disk as the resin substrate integrally provided with the spool is provided, and the bar code displaying the film data such as the film sensitivity and the number of exposures, is recorded. This bar code can be formed by various methods, and for example, in Japanese Tokkaihei No. 8-254794, a method by which a low level pattern using the data disk surface (black) as it is, and a high level pattern in which the member having the large reflection factor (a transfer material such as the transfer foil) is thermally transferred on the disk surface, are structured and provided, is disclosed. This is a method by which the bar code is provided by so-called hot stamping.
In the hot stamping by which the bar code is formed on the resin substrate, transferring is conducted, at the time of heating and pressing, in such a manner that the resin data disk surface is slightly melted, and the transfer foil as the transfer material is stuck in the data disk. A sectional view of the conventional bar code forming portion of the data disk by the hot stamping after transferring is as shown in
FIG. 6. A
portion which is heated and pressed by the hot stamping, is a concave portion
31
, and the outside of the concave portion is formed into a convex portion
32
by the melt resin. The inclined surface connecting the concave portion
31
and the convex portion
32
is a tapered portion
34
. Further outside the convex portion
32
is the resin substrate surface
33
of the original data disk which is not affected by the heating and pressing by the hot stamping, and this is the low level pattern LP. The periphery of the concave portion
31
is rimmed by the resin convex portion
32
into the shape of just a plate of the hot stamping.
On the bar code forming surface which is formed by such the hot stamping, and has the concave portion
31
and convex portion
32
as shown in
FIG. 6
, it is found that, depending on the shape of the concave portion
31
and the convex portion
32
, or the condition of formation of the bar code, the misconception of the bar code reading sensor easily occurs. Specifically, in the APS camera whose sensor has the high sensitivity, it is found that this tendency is more conspicuous.
SUMMARY OF THE INVENTION
The object of the present invention is, in the bar code forming method in which the transfer material is heated and pressed by the hot stamping die and the bar code is formed on the resin substrate by the transferring, to provide a bar code forming method to form the bar code having the quality by which the bar code reading sensor does not cause the misconception of the reading, and to provide an APS film cartridge on which the bar code by which the bar code reading sensor does not cause the misconception of the reading, is formed.
The above described object of the invention can be attained by one of the following structures (1)-(19).
(1) A bar code forming method, which has the step of:
forming the bar code which satisfies the following conditions, by transferring at least one portion of the transfer material onto the resin substrate by heating and pressing the transfer material onto the resin substrate, wherein, when the difference of the height between the concave portion formed on the resin substrate by the heating and pressing, and the convex portion protruding on the periphery of the concave portion, is h, and the distance between the top of the convex portion and the edge of the convex portion side of the concave portion, is d, 0.01 mm≦h≦0.05 mm, and d<0.1 mm.
(2) In the method of the structure (1), the step for forming the bar code is conducted by heating and pressing the transfer material by the hot stamping die.
(3) In the method of the structure (2), the angle &thgr;
3
formed between the concave portion, and the tapered portion connecting the concave portion to the convex portion, is not more than 135°.
(4) In the method of the structure (2) or (3), the angle &thgr;
1
formed between the pressing surface of the hot stamping die by which the resin substrate is heated and pressed through the transfer material, and the side surface connected to the pressing surface, is not larger than 90°.
(5) In the methods of the structures (2) to (4), a supporting member is provided on the rear side of the surface of the resin substrate on which the bar code is formed, and an elastic body is provided on the surface which is in contact with the resin substrate, of the supporting member.
(6) In the method of the structure (5), the elastic body is rubber, and the thickness of the rubber is 0.5-2 mm, and the rubber hardness is 70 degrees −100 degrees.
(7) In the method of the structure (2), the difference of the height k between the concave portion, and the resin substrate surface which is not affected by the heat by the heating and pressing, is not smaller than 1/10 times and not more than 1/5 times of the amount of undulation in the bar code forming portion of the resin substrate.
(8) In the methods of the structures (2) to (7), the amount of the undulation in the bar code forming portion of the resin substrate is not more than 30 &mgr;m.
(9) In the methods of the structures (2) to (8), by setting the temperature of the leading edge portion contacting with the resin substrate of the hot stamping die to 120° C.-180° C., and the time of the heating and pressing to not longer than 0.4 sec, the difference of the height is made to not smaller than 0.01 mm, and not more than 0.05 mm.
(10) In the methods of the structures (2) to (9), the surrounding of the heat transfer portion of the hot stamping die is covered by the heat insulating material.
(11) In the methods of the structures (2) to (10), the resin substrate is the data disk of the APS film cartridge.
(12) In the method of the structure (1), d>0.
(13) The bar code forming method, which having the following step: a step in which the bar code is formed in such a manner that at least one portion of the transfer material is transferred onto the resin substrate, by heating and pressing the transfer material onto the resin substrate by the hot stamping die so that the following conditions are satisfied, wherein, when the temperature of the leading edge portion of the hot stamping die is T, the pressing force by the hot stamping die is F, and the pressing time of the hot stamping die is t, 120° C.≦T≦180° C., 100 kgf≦F≦400 kgf, and 0.2≦t≦0.4.
(14) In the method of the structure (13), when the cooling time is S, the heating and pressing is carried out so that the condition of 0.2 sec≦S≦0.4 sec is satisfied.
(15) In the method of the structure (13), the load deflection temperature of the resin substrate is 100-110° C. when the load is 18.5 kgf/cm
2
.
(16) In the method of the resin substrate is 100-110° C. when the load is 18.5 kgf/cm
2
.
(17) In the film cartridge, a spool around which the film is wound, and the data disk which is arranged on the spool, and has the resin substrate in at least one portion, wherein the data disk has the bar code formed by heating and pressing the transfer material, and the bar code portion satisfies the following conditions: when the difference of the height between the concave portion formed on the resin substrate by the heating and pressing, and the convex portion protruding on the periphery of the concave portion, is h, and the distance between the top of the convex portion and the edge of the convex portion side of the concave portion, is d, 0.01 mm≦h≦0.05 mm and d<0.1 mm.
(18) In the film cartridge of the structure (17), the film cartridge is the APS film cartridge.
(19) In the film ca
Goda Yoshihiko
Takahashi Nobuaki
Hirshfeld Andrew H.
Konica Corporation
Muserlian Lucas and Mercanti
Nguyen Anthony H.
LandOfFree
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