US1768312A - Two-color rotary printing machine - Google Patents

Description

June 24, 1930. A. FALLOT TWO-COLOR ROTARY PRINTING MACHINE Original Filed Feb. 1, 1924 amnnn'rano'r, nn cnasnn LATE or rnaunn, GERMANY; m? r Patented June 24, 1930.

- UNITED, STATE PATENT; OFFICE Y PRIESTEB,

EXECUTOB, 0F BERLIN, GERMANY Two-coma 3.0mm: rnmrms micnmn Original application filed February 1, 1924, Serial No. 690,030, and in'G-ermany February 14, 1823. Divided and this application filed Kay 2, 1828. Serial No. 274,597.

ors. The known machines of' this type have a comparatively large number 9f cyl- ',inders and, in consequence are either very high or require a large floor space. One particular type is known havin mechanisms in connection with cylinder, with the result, that changing' the inking rollers is difiicult, and that only one 0 two inking damping-device can "bearranged for these o plate cylinders upomthe blanket cylinder.

two mkm -mechani sms in common. This, however, as proved to be a great handicap in practical work since it makesit i mpossible to independently regulate the water supply for the plate cylinders.

e'arrangement of the plate cylinders in'both these'cases, is not very serviceable an the various parts of the machine are. not as am supervisible and accessible aslwould' be reuired in offset printing machines, to'which 's invention has special reference. This type ofmachine is designed to performvery delicate .work'andrequires justaas delicate7- attention. There enists 'another drawback in connection with machines'having a separate plate cylinder for each"color, ,wh1ch' consists "in that the printing pressure of the two plate-cylinders upon the blanket cylare overcome by and an impression cylinder of onlyhalf that iameten. Th Sheet coming fidmjif .g

device, for instance "from a feed" table'- or from reed ro s S z d the small cylinder andcarried oncej'around same, during PwhiQh tim it is printedillpon with one color fbyyone' -ofithe twoiprintin'g surfaces of the blanket-cylinder, whereupon printing one plate counter-act each other,so that clear printin inder-starts at "different times, so that the g to the invention enlist-cylinder, P

cylinder and of the twoplate cylinders: are i' all ositioned in one'plane, and" the -o fi'set sur aces of the platecylinders are dis so that the printing ressure upon the ketcylinder of hot plate cylinders sed .mences' simultaneously. Owin to this 1-- rangement the pressures exerte by the t,

may be relied upon.- 7

In the-drawing one embodiment. of the invention is illustrated, the figure showing diagrammatically a part sectional side elevation of the machine.

In' he example shown small im re'ssion cylinder 0 and moved once around t is cylin er, during which movement the sheet is printed in on with one color by the blanket d of the blanket cylin- -der e, which latter has received the desi from the zinc plate f of the plate cylinder g. After having completed one revolution on thesmall impression cylinder 0 the sheet is seized by the which has'already once bee rinted u 11 during the aforesaid ,sta 'Fh Po surface 23 receives its design from the zinc printed upon withthe second color, whereupon it passes between the blanket cylinder and the set-ofl' portion m of cylinder 9 to transferred to the delivery lS'sntio'n o of the plate cylinder 1 is not cov the zmc plate 1:. and is'likewise set-s than as not to contact with rubber blanket ofthefblanket cylinder e during its pas-,

Iv I p "5 d mples cylinders 'g and Z-areeach. progrippers k which, are provided near the starting edgeof the-second printmg surface; it of the blanket. cylinder e; and "deposited onto this surface with that side is print ng late in of the seccnd plate cylinder 1. Dur-' "ing its: passage between the impression cylin *.'der 0 and the blanket-'cylinderethe sheet is muss drawing, the paper is fed into the machine from a teeth '7 table a. It is seized by the grippers b of the cylinder m The delivery impression respectively. The inking mechanisms 1' and s are positioned above their plate cylinders which arrangement, as is known, greatly imroves the efiect of color distribution.

Both the plate cylinders g and Z may be moved out of their operative position together with the small impression cylinder 0 by means of the control arrangement 25 which comprises a common control rod 20 adapted to act upon the eccentric bearings 42, w, w for the said cylinders. For this purpose the two eccentric bearings 42 and to, which serve for the displacement of the plate. cylinders g and Z are disposed at difierent sides of the plane passing through the axes of the two plate cylinders and the blanket cylinder. cylinder n is arranged so as to be able to collect two sheets.

The machine according to the invention may also be used for perfecting which, in the printers terminology, means to print a sheet upon both sides. In this case the small cylinder 0 must be provided with an india rubber blanket upon which to re ceive the printing from the printing surface a} during its first rotation. During the second rotation it seizes a sheet, which is supplied from the feed table, by means of its grippers b and transmits same to the grippers h of the blanket cylinder.. The sheet then comes into contact with the india rubber blanket 11 and is printed upon on both sides while passing between the impression cylinder '0 and the blanket cylinder, whereupon it is moved to the delivery roll '11..

In the embodiment of the printing machine shown in the drawing there is shown a standard y upon which'a pair of adjustable cutting cylders a is mounted, between which a emai in web of paper I) may be supplied from a roll of paper a. The sheets cut from the said web are seized by the grippers b of the impression cylinder 0 'and moved through the printing machine inthe afore described manner; for which purpose the lppers b of the impressio cylinder may e made adjustable. v 1

This application is a division of the application of Alfred Fallot, Serial No. 690,030, filed February 1, 1924, now Patent No. 1,668,999, May 8, 1928. The single figure in this application corresponds to Fig. 1 as originally filed in said application. Having now particularly described the nature of my said invention and in what manner the same is to be performed; I declare that what I claim is 1. In a two color rotary printing machine a blanket-cylinder, two blankets on the same, two plate cylinders adapted to cooperate with said blanketcylinder, an impression cylinderof only the half diameter of the blanket cylinder, a paper feeding device, a set of grippers on the said impression cylinder by means of which the sheet coming from the feeding device is passed once around the impression cylinder to be printed upon by one of the blankets of the blanket cylinder, a second set, of grippers on theblanket cylinder by means of which the sheet thereupon is caught and is printed upon by passing between the impression cyl inder and the second blanket of the blanket cylinder and a delivery device for removing the printed sheet from the machine;

2. In a two color rotary printing machine, a blanket cylinder, two blankets on the same, aplate cylinder on each side of the blanket cylinder, inder and of the two plate cylinders all lying in-one plane, offset surfaces on the plate cylinders arranged in such a manner, that the the axes of the blanket cylpressure of both plate cylinders upon the blanket cylinder commences simultaneously. an impression cylinder of only the half diameter of the blanket cylinder, a paper feeding device. a set of grippers on the said impression cylinder by means of which the sheet coming from the feeding device is passed once around the impression cylinder to be printed upon by one of the blankets of the blanket cylinder, a second set of grippers on the blanket cylinder by means of which the sheet thereupon is caught and is printed upon by passing between the impression cylinder and the second blanket of the blanket cylinder and a delivery device for removing the printed sheet from themachine.

3. In a.-two color rotary printing machine, a blanket cylinder,"two blankets on the same, a plate cylinder arranged on each side of the blanket cylinder and adapted to cooperate with thesame, the axes. of the blanket cylinder and of the two plate cylinders all lying in one plane, excentric bearings for said plate cylinders, the centres of such excentric bearingsbeing disposed at difierent sides of the common plane passing through the axes of the two plate cylinder. and the blanket c linder, an impression cylinder of only the half diameter of the said impression cylinder,' common means for simultaneously moving all excentric bearings in order to bring said plate cylinders and said impression cylinder out of operablanket'cylinder, an excentric bearing for i tive engagement with the blanket cylinder,

a paper feeding device, a set of grippers on the said impression cylinder bymeans of which the sheet coming from the feeding ,device is passed once around the impression tween the impression cylinder and the sec- 0nd blanket of the blanket cylinder and a delivery device for removing the printed sheet from the machine.

4. In a two color rotary printing machine, a blanket cylinder, two blankets on the same, two plate cylinders ada ted to cooperate with said blanket cylin er, an impression cylinder of only the half diameter of the blanket cylinder, a paper feed table, a set of grippers on the said impression cylinder by means of which the sheet coming from "the paper feed table. is passed In testimony whereof I have signed my name to this specification.

HARRY PRIESTER.

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