US896899A - Multicolor-printing machine. - Google Patents

Description

No. 896,899. PATENTED AUG. 25', 19051. F. W. H, DIETRIOH. MULTIOOLOR PRINTING MACHINE.

APPLICATION FILED DEO.4,1907.

2 :JJEETSSHEET 1 Witnesses.

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No. 896,899. PATENTED AUG. 25, 1908.

P W. H. DIETRICH. MULTICOLOR PRINTING MACHINE.

APPLICATION YILED DEU,4,1BO7.

z SHEETS-SHEET 2.

srnrns ri rnsir enric FRANZ 5 WILHELM HERMANN DIETRICH, OF ALTONA, GERMANY, ASSIGNOR TO WILHELM I JVEN, OF MUHLENBERG, GERMANY.

MULTICOLOR-EBINTING MACHINE Specification oi Letters Patent.

Patented Aug. 25; 1908.

' Application filed December c, 1961' Serial No. l05,096.

To all whom may concern:

Be it known that I, FRANZ WILnELM Hen- MANN Dis'riucn. a subject of the Emperor of Germany, and resident of No. 85 ()evelgi'inncnltona, German Ein pire, have invented certain new and useful Improvements in iil'ulticolor-lrinting Machines, of which the following is a specification.

This invention relates to 1nulti-color-prin ting machines of the kind which print endless webs of paper or fabric with polychrome patterns by means of a number of rollers which become operative insuccession, each of these rollers carrying a part of the petternns a printing block and each being given one color. in machines of this kind, the adjustnient of a. set of rollers corresponding to e pattern has been found very dillicult and tedious, as in adjusting the machine for it fresh pattern, it was only possible to get the :uljustincnt perfect by tithing proofs, that is to say in the iirst place, it was nccesser r to take a proof of the portion of the pattern on the first roller in its color, then to adjust the second roller in such a manner that its iniprcssion should come as far possible in its proper place close to or with regard to the imprcssion from the first roller, and then to corrcct the position of the second roller in case the correct position for it did not happen to have been foundat the first trial, whereupon the composition had to be tested once more by taking it second proof off the first roller, and these experimentsshad to be repeated with. every additional roller. In addition to causing loss of time and labor, this method h: the drawback of giving a great amount of waste of the material to be printed upon.

The present invention-has for its object to abbreviate the time of adjustment considerably by enebling the rollers to be adjusted correctly relatively to each other at once so that adjustment can be effected speedily and securely by quite inexperienced Worlnncn.

The invcntionconsists broadly in providing indexes or other appropriate indicating devices on the spindles of the rollers for ascertaining the angles at which certain points on the several rollers must ,lie relatively to each other or to a line joining the center of the printing roller and the center of the impression cylinder in order to obtain accurate printing, the adjustment of these indicators relatively to each other or to a certain line of reference insuring the correct relative positions of the roller types.

.iefercnce is taken to the' accompanying drawing in which similar letters refer to similar ports.

Figure 1 is a diagrainmatical view illustmting the principle of the invention. Fig. 2 a dizigramineticnl end-view of an impression cylinder operating in combination with four rollers. Fig. 3 an elevation of a gage used in connection with this invention and Fig. 4 an enlarged detail view of the adjustable bearings for the rollers.

The invention may be best understood by first taking rclcrcnrc to Fig. 1. For example if it is required to bring the four pattern roll- Ms A, it, (1, l), and the portions of the petlcrn upon them in the proper order one after the other into contact with the web passing round the impression (J'\'lll1(l(l"ltth(l assuming a and l) to be two portions of the pattern of which I) is to follow a, and to come exactly against the end a, of a; in another color, it

'would be necessary for the end i) of l) to be situated in the line 2 joining the centersof the cylinder and roller at the moment at which the end a of the impression it leaves the line 2. Therefore, when the pattern 0 starts to pass the line 1 joining the centers of A. and '1 that is to say when it begins its printing operation, the point I) must have such a position relatively to the line 2 and to the line 1 respectively that the periphery of Bis able to turn or roll on T just to such an extent that the time the impression of a on the cylinder T reaches the line 2 the point I) will also pass the same point that is the common point of intersection of the circles B 'l and the line 2. The position of the point I) relatively to a is therefore defined bythe angle 1r+ 180 at the center belonging to th at arc of the periphery of the roller B which in its development is equal to that of the portion of the peripl'iery of the impression cylinder T situated between the lines 1, 2 plus the length a.

If in another example a designates a number of parallel, one-colored strips, and b strips or" equal length which are to be located between the strips a, the point I) would have to correspond to ancngle ,6 at the center the 105 are of which in its development is equal to that of the portion of the peri hery of the printing cylinder T situated lietween. the

lines 1, 2. The point 15' must then be located at X in order that when the pattern impression a reaches the line 2, the point X may one set, the adjustment is very readily effected by means of appropriate setting devices provided on the rollers. Pointing marks 01 are preferably arranged laterally ,on the impression cylinder T in the direction of the lines which connect the center of the impression cylinder shaft with the centers of the pattern printing rollers A, B, C, D, one journal of each of the printing rollers being providedwith a rib y for attaching to the same the channeled hub of an angle setting device. These ribs 1 might be formed on the journals of the rollers in such a position that their center-lines when placed opposite the lines joining the centers and the pointing marks (1 would at once indicate the correct position of the portion of the pattern on their rollers relatively to each other. However, this would not give-sufficiently exact results and since for ractical reasons this mode could not well e carried out, the ribs may advantageously be arranged in such a position that they coincide with the beginning of the part of the pattern which first comes into contact with the printing surface. In the first place a pointing instrument such as a scale or a gage S shown in Fig. 3 is arranged on the end of the roller A as indicated in Fig. 2. This instrument preferably consists of a pointer s which is arranged to slide between two guideways g and may be adjusted by means of a nut s, so that it can be brought opposite the first pointing mark (1 of the impression cylinder T in this position the por- 'tion of the pattern situated on A just begins to come into contact with the impression cylinder. The gage or instrument S is then placed upon the second roller B and brought opposite the second pointing mark d; the pointer of the gage S also serves to bring the journal of the roller B by adjusting its bearing to exactly the same distance from the center of the im ression cylinder as isthe case with the r0 ler A. Since the various sets of pattern rollers are rareh of the same diameter, and the surface of the impression cylinder temporarily must be turned true the ages are made adjustable. When the second roller-has been arranged in this manner at the proper distance from the impression cylinder '1, it is rotated backwardly in the direction of the arrow 2 (Fig. 2) to the same extent as was explained with reference to Fig. 1, the magnitude of this angle having seaeoe been determined experlmentally in the prep'a "I purpose the journal of the roller may be pro vided with an indicator, which whenadjusted by means of the gage S attains aposition opposite the same. This indicator may be'represented by'the latter itself, while the journal bearing carries a lateral mark m, Fig. 4, to which the indicator is then set.

As clearly illustrated in said Fig. 4 a frame E is mounted in close proximity to the impression cylinder T and has guide-ways e radially arranged with regard to the axis of said cylinder. The journals of the rollers rest in bearing blocks 1) slidably mounted in said guide-ways and are movable toward and from the im pression cylinder by means of adjusting screws 1) which may be locked in position by lock-nuts p as is usual with adjustable bearmgs.

In Fig. 4, the indicator is represented by an arrow n on the end of the journal and by a' longitudinal notch 0, which in setting the roller should coincide with the mark m on the bearing p.

I claim:

1. Means for adjusting the rollers on multi color printing machines having an impression cylinder and a series of printing rollers oper: ating with the impression cylinder, in combination with a series of pointing marks on the end surface of t] io cylinder and with a re-- movable pointer provided with an opening varying in contour, the journals of the rollers shaped to fit into the opening of the pointer to allowthe latter being set on the journal of each roller in a predetermined direction.

2. Means for adjusting the rollers on multicolor printing machines having an impression cylinder and a series of printing-rollers operating with the impression cylinder, pointing marks on the cylindercorresponding in numher with the printing-rollers and an adjustable pointer for the rollers to adjust the same in respect to the pointing marks.

3. Means for adj ustin the rollers on multi-- color printing machines having an impression cylinder and a series of printing rollers operating with the impression cylinder, pointing. marks on the latter corresponding in number with the printing rollers, a pointer arranged to slide on the end of the roller and a scale in connection with the slidable pointer, to properly adjust the same.

FRANZ WlhllEhM HERMAN}! DlETRICH.

Witnesses: i

Max F. A. KAnMrrF, Eimns'r H. L. li IUMMENIIOFF.

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