Intaglio printing press

Details Intaglio printing press Intaglio printing press

1999-08-18

2001-03-20

Hilten, John S. (Department: 2854)

Printing

Intaglio

Rotary

C101S119000, C101S150000

Reexamination Certificate

active

06202554

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an intaglio printing press, and especially, one useful when applied to printing of banknotes or securities.
2. Description of the Related Art
FIG. 4
shows an example of a conventional intaglio printing press applied to printing of banknotes or securities (see, for example, Japanese Examined Patent Publication No. 2-42070). As shown in
FIG. 4
, a plate cylinder
112
having an intaglio plate mounted on an outer peripheral surface thereof is contacted with an impression cylinder
111
. To the plate cylinder
112
, an ink collecting cylinder
113
having rubber blankets mounted on an outer peripheral surface thereof is opposed in contact with the plate cylinder
112
. To the ink collecting cylinder
113
, three chablon rollers
114
are opposed in contact with the ink collecting cylinder
113
along a circumferential direction of the ink collecting cylinder
113
. To each of these chablon rollers
114
, an ink fountain or reservoir
117
filled with ordinary ink for printing of a main pattern is opposed in contact with the chablon roller via an ink fountain roller
116
and intermediate rollers
115
. To the plate cylinder
112
, a chablon roller
118
is also opposed in contact therewith. To this chablon roller
118
, an ink fountain
121
filled with special ink, such as OVI (Optical Variable Ink), for printing of a pattern for forgery prevention is opposed in contact with the chablon roller
118
via an ink fountain roller
120
and intermediate rollers
119
. Opposite the plate cylinder
112
and downstream from the ink collecting cylinder
113
, a wiping roller
122
is disposed, in contact with the plate cylinder
112
, for removing surplus ink adhering to the surface of the intaglio plate. The wiping roller
122
is immersed in a solvent stored in a wiping tank
123
.
The foregoing conventional intaglio printing press is operated in the following manner:
When each ordinary ink is supplied from inside the ink fountain
117
to the chablon roller
114
via the ink fountain roller
116
and the intermediate rollers
115
, each such ink is fed to the ink collecting cylinder
113
, and then to the intaglio plate of the plate cylinder
112
. On the other hand, when special ink is supplied from inside the ink fountain
121
to the chablon roller
118
via the ink fountain roller
120
and the intermediate rollers
119
, the special ink is directly fed to the intaglio plate of the plate cylinder
112
. The inks supplied to the intaglio plate of the plate cylinder
112
have their surplus amounts removed by the wiping roller
118
. The remaining inks on the intaglio plate of the plate cylinder
112
are transferred to a sheet passed on to the impression cylinder
111
to perform printing.
Special ink, such as the aforementioned OVI, is expensive and has poor transfer characteristics. Thus, when it is supplied from the ink fountain
121
to the intaglio plate of the plate cylinder
112
via the ink fountain roller
120
, the intermediate rollers
119
, and the chablon roller
118
, its loss increases, thereby deteriorating printing quality, and making the printing cost very high. Methods for minimizing the use of the intermediate rollers
119
, etc. have been worked out, but have been unsuccessful in obtaining satisfactory results.
SUMMARY OF THE INVENTION
The present invention has been accomplished in view of the above-described problems. It is an object of the invention to provide an intaglio printing press which can use special ink with high efficiency.
To attain the above object, the present invention claims an intaglio printing press, comprising:
a plate cylinder having an intaglio plate mounted on a circumferential surface of the plate cylinder;
an impression cylinder contacted with said plate cylinder;
an ink collecting cylinder contacted with said plate cylinder and having a blanket mounted on a circumferential surface of the ink collecting cylinder;
a first ink supply means for supplying ink to said blanket of said ink collecting cylinder;
a second ink supply means, contacted with the plate cylinder, for supplying ink to said intaglio plate; and
a wiping roller contacted with said plate cylinder,
wherein
said second ink supply means includes a rotary screen.
According to the intaglio printing press of the present invention, as described above, the second ink supply means having a rotary screen is in contact with the plate cylinder and adapted to supply ink to the intaglio plate. Even special ink, which is expensive and poor in transfer characteristics, can be supplied with high efficiency to the intaglio plate of the plate cylinder, if it is supplied by a unit with a rotary screen. Thus, even when special ink, expensive and poor in transfer characteristics, is used, deterioration of printing quality can be prevented, and an increase in the printing cost can be suppressed.
In the intaglio printing press according to the subject invention, the rotary screen is comprised of a rotatably support cylindrical hollow roller having a small hole pattern formed therein; an ink feed means for feeding ink to an inner peripheral surface of said hollow roller; and a squeegee, disposed inside said hollow roller, for delivering the ink, which has been fed by said ink feed means, through the small hole pattern of said hollow roller.
In the intaglio printing press, said second ink supply means includes a rotary screen, and a rubber roller contacted with said hollow roller of said rotary screen and said intaglio plate of said plate cylinder.
In the intaglio printing press, the rubber roller has a groove in an outer peripheral portion thereof in contact with an ink portion transferred to said intaglio plate of said plate cylinder.
In the intaglio printing press, support portions for constantly supporting said squeegee of said rotary screen via said hollow roller are located on said rubber roller.
In the intaglio printing press, the ink supplied by said second ink supply means comprises OVI (Optical Variable Ink).


REFERENCES:
patent: 4056056 (1977-11-01), Giori
patent: 4103615 (1978-08-01), Cruz et al.
patent: 4441423 (1984-04-01), Germann
patent: 4516596 (1985-05-01), Giori
patent: 4604951 (1986-08-01), Ichikawa et al.
patent: 5062359 (1991-11-01), Giori
patent: 5146850 (1992-09-01), Funada et al.
patent: 5722322 (1998-03-01), Watanabe
patent: 5771800 (1998-06-01), Inamine et al.
patent: 242070 B2 (1990-09-01), None

Affiliated with

Also associated with

Rating

Intaglio printing press does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Intaglio printing press, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intaglio printing press will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2442731