JP2017196886A5

JP2017196886A5 -

Info

Publication number: JP2017196886A5
Application number: JP2016177094A
Authority: JP
Filing date: 2016-09-09
Publication date: 2019-10-31
Anticipated expiration: 2036-09-09

Claims

A cylindrical blanket roll that moves horizontally in the first direction while rotating;
A gravure offset printing apparatus comprising two or more ink transfer plates in contact with the lower end of the blanket roll and coated with different color inks,
A blade that moves in a second direction perpendicular to the first direction with one end in contact with the ink transfer plate so that the different color inks are not mixed with each other during squeegee,
While the blanket roll rotates once and moves in the first direction, the ink on two or more transfer plates is transferred to the surface of the blanket roll,
The gravure is characterized in that two or more inks transferred to the surface of the blanket roll are overprinted at the same target point on the printed matter located in front of the blanket roll to perform multicolor printing. Offset printing device.

After printing the first ink part on the printed matter,
After the printed material moves in one direction in the first direction, the blanket roll moves in one direction in the first direction as it rotates while rotating without moving up and down in order to print the second ink portion. The gravure offset printing apparatus according to item 1, characterized in that

2. The gravure offset printing apparatus according to claim 2, wherein the distance that the printed matter moves unidirectionally in the first direction is the same as the distance that the blanket roll moves unidirectionally in the first direction while rotating.

The distance that the printed matter moved unidirectionally in the first direction, and the distance that the blanket roll moved unidirectionally in the first direction while rotating,
2πr / N = L + Δ + δ,
Where N is the number of transfer plates,
L is the length of the transfer plate in the first direction,
Δ is the distance in the first direction between the transfer plate and the transfer plate,
ε means a value obtained by dividing δ, which is a minute correction amount due to a change in the length of the radius (nip (Nip)) generated by the elastic roller in contact with the transfer plate and the printed material, into N. The gravure offset printing apparatus according to item 3.

Each ink transfer plate is disposed with a predetermined interval (Δ) in the first direction,
The outer circumference of the blanket roll is
The gravure offset according to the first item, wherein the gravure offset is equal to or longer than a length obtained by adding a length in a first direction of each ink transfer plate and a length in a first direction at a predetermined interval between the ink transfer plates. Printing device.

The outer circumference of the blanket roll is

And
here,
N is the number of transfer plates,
Li is the length of the i-th transfer plate in the first direction,
Δj is the plate spacing in the first direction between the transfer plates following the jth transfer plate,
δ means a minute correction amount due to a change in the length of the radius (nip (Nip)) generated by the elastic roller in contact with the transfer plate and the printed material, respectively, the fifth gravure offset printing apparatus .

The hardness of the blanket roll is JIS-A standard 40 degrees or less and 0 degrees excess,
The gravure offset printing apparatus according to claim 1, wherein the blanket roll has a roll rotation speed and a horizontal movement speed in the first direction of 0.5 m / min or more and 12 m / min or less on the transfer plate.

2. The gravure offset printing apparatus according to claim 1, wherein a start ink line and a residual ink line do not enter the movement range of the blanket roll in the first direction.