DE443399C - Multi-color rotary rubber printing machine - Google Patents

Description

GERMAN EMPIRE

Blbliotheek

Bur Kt Eigenendom
1-SEP. 1927

ISSUED ON
JULY 30, 1927

REICH PATENT OFFICE

PATENT LETTERING

CLASS 15 d GROUP 19

V 20222 XIIjIßd

Vogtländisclie Maschinenfabrik (formerly J, C. & H.Dietrich) A.-G. in Plauen i.V.

Multi-color rotary rubber printing machine.
Patented in the German Empire on May 12th! 925 from.

To the ongoing. Printing on paper and fabric webs is already used on rotary rubber printing machines two blanket cylinders offset by 90 ° to one another assigned to a printing cylinder that is twice as large, so that Both blanket cylinders are always used for printing at the same time. As a result of the chosen Arrangement, the pressure cylinder experiences a shock effect every time the pressure is used Mean force corresponds to the individual forces exerted by both blanket cylinders. These The impact effect causes the printing cylinder to oscillate, which affects the rubber and plate cylinder transferred and destroy or to destroy the printing plate in the course of time Give rise to the formation of stripes.

In order to exclude these disadvantageous phenomena, according to the invention, the Blanket cylinders arranged in such an even distribution on the impression cylinder, that the pressure forces exerted abruptly on the pressure cylinder with each use of pressure keep each other in balance. As a result, oscillating movements of the Printing cylinders and their repercussions on the blanket and plate cylinders are excluded, so that a consistently good impression of the printing plates in large numbers is possible.

In the drawing, a four-color rotary printing press is an exemplary embodiment of the invention shown for bow. The sheets are transferred from the feed table 1 to the printing cylinder by means of the transfer gripper 2 3 supplied, its scope in four

ao equal fields is shared. At the front edge of the fields are grippers in a known manner provided that capture the sheet and move it during one revolution of the impression cylinder hold on until they finally deliver it to the execution cylinder 4, through which it is in on is passed on in a known manner, in order to finally be deposited on the sheet stack 5 will.

- Around the printing cylinder 3 four blanket cylinders 6, 7, 8, 9 are provided, which with one plate cylinder 10 each work together. Each plate cylinder has a known Way a dampening and an inking unit. The diameter of the printing cylinder 3 is four times as large as that of the blanket cylinders 6, 7, 8, 9, while these are just as large as the one Plate cylinder 10 are. As a result, corresponds the width of each of the above-mentioned fields of the impression cylinder is exactly that Processing of a blanket or plate cylinder.

Lift as a result of the even distribution of the blanket cylinders around the impression cylinder which are always exerted simultaneously by the blanket cylinder with each use of printing Impact forces on each other, so that there are no vibratory movements of the printing cylinder result. This can also be achieved with two cylinders if they are at 180 ° from one another are offset. Three cylinders had to be spaced apart in a corresponding manner of 120 °.

Claims (1)

Claim: Multi-color rotary rubber printing machine, in which several rubber and ! Plate cylinders are assigned to a larger printing cylinder in such a way that the printing inserts in all Guminizyliiidern always take place simultaneously, characterized in that the blanket cylinders (6 to 9) arranged in such a uniform distribution on the printing cylinder (3) are that the jerky on the printing cylinder with each printing use the pressure forces exerted to keep each other in balance.