US1698141A - Apparatus for transferring and multiplying on photographic way images upon printing plates - Google Patents

Description

Jan. 8, 1929. 1,698,141

F. G. MORTELMANS ET AL APPARATUS FOR TRANSFERRING AND MULTIPLYING 0N PHOTOGRAPHIC WAY -IMAGES UPON PRINTING PLATES Filed July 2, 1926 5 Sheets-Sheet 1 WHQ l/ @w NS FAI- FLYING 0N NG PLATES 3 Sheets-Sheet 2 G. MORTELMA TRANSFERRING AND MULTI WAY IMAGES UPON PRINTI Filed July 2, 1926 F. APPARATUS FQR PHOTOGRAPHIC Jan. 8, 1929.

FLYING ON TING PLATES 3 Sheets-Sheet 5 S ET AL.

FERRING AND MULTI IMAGES UPON PRN Filed July 2, 1926 RTELMAN NS M? APPARATUS FOR im WAY Jan. 8, 1929.

PHOTOGRAPHIC u1ud A I4 Patented Jan. 8, d1929.

UNITI-:ov sTATl-:s

`1,698,141 leiifllazlv'r OFFICE.

FRANCISCUS GOMABUS MORTELMANS AND WILLEM JOHANNES MEIJER, OF/"I'Hlj'f` HAGUE, NETHERLANDS.

APPARATUS'KFOR 'rnANsrnnnrNe AND MDLTIPLYING oN IMAGES UPON PRINTING Pinares.

rnoroenarmc WAY Application led Iuly, 1926, Serial No. 120,189, and in the Netherlands July 3, 1925.

i The invention relates to an apparatusfor transferring images photographically to a.

printing plate of Zinc or like material, provided fon this purpose with a sensitive layer, and for multiplying said images by causing a relative displacement of the` negative or other original, from which copies are to be p made, and the. plate, and makingv a photoi graphic copy in ,any desired position of the negative.' "l f* Apparatus of this typevare known. The main requirements are the following ones. The relative displacement of the negative has to. be effected most accurately vin order to-obtain a perfectregister of all the images when using apluralityofprinting plates in color printing. The negative' should beV adjusted exactly by the square with respect in whichit is displaced. The contact between negative and printing jplate should be very intensive during lighting.

The existin apparatus have objections as to all these eatures are of a complicated construction" and exceedingly expensive.

i Therefore they are only within the reach of employ such a' few large printing olices, although numerous shops 'of moderate capacity could an apparatus, but lnow are bound to the manual method bymea'ns of a suitable copying paper.

The invention has in view to provide for important simpliiications, more .specially in adjusting and pressing the negative and consists chieiyy in that the originalis mounted in' `anegative holding frame with pins perpendicular to the plane of the negative and adapted to be placed into holes of brackets attached to the lighting ease, and means are provided foraligning the negative centre lines with the centre l/ines through the pins of the negative holding'frame, before attaching said frame to the lighting case.Y

According to the invention there may be four brackets arranged in suchv a way that both lines connecting the centres of two oppositely located holes, `are perpendicular to each other' and the distances between said Lholes' are equal rto each other.

It is thereby possible to turn over 90 .the`

v negative holding frame )withoutfurther adjustment. A Y A The alignment of the negative may be ob- Vcally.

va section on the line II-II in tained by placing the pins of the negative holding framein sliding blocks, whichby means of set screws are adjustable in'said frame in two directions perpendicular 'to eachother.

The contact between the negative and the printing plate may be obtained in the fol-I Fig. 1 is a top-view of the entire machine. Fig; 2 leftside is an elevation; vrightside Fig. 1.

rightside a Fig. 3 leftside is an Aelevation;l

Fig. l.

section on the line III-III in Figs, 4, 5 and 6 arey details scale.

Fig. 7 is a top view of a cross ruler.

'i The machine consists of a "horizontal frame 1 supported at rthe corners by four supporting feet 2. The two longitudinal sides'of. the frame. are at lthe top side conl structed as gides 3, along which a. support 4 can be shifted. This support then moves over a table leaf 5, supportedt the two 'i short sides of` the frame andlupon which the printing plate 6 maya be clamped in vsome suitable way (e. g. by suction) The support 4 is in its turn provided with two guides 7, perpendicular to the guides '3 oftheJ frame. Over these guides 7a lightingK case 8 may be shifted. rI-his lighting 'case has a carriage or outer "case 9 bearing by means of the slides 10, Figs. 1 and 2, upon the guides 7 land an inner Aportion llyvertically slidable` in the outer case 9.

`Within the lighting case a glass plate 52, Figs. 2 and 3, is further, arranged between the lighting lamp and the negative in order to prevent carbon particles from the arclamp from falling upon the negative.

For guidance ofthe inner portion 11 in on a larger the louter case Q'adju'stableV centring strips 54, machined' slightly `tapering, are provided.VM

The negative holding frame 12 is attached to the bottom of the, lighting case in away which will 'be described later on, while against the glass plate 13 of this negative holding .frame be glued.

The displacement of the lighting case 8 the negative 20 itself mayalong its Guides 7 is effected by means of aV threaded. s aft l4,\bearing in the endwalls of the support 4 at 15 and 16 and carrying a nut 53, attached to thel outer case 9 of the lightingcase. l

The displacement ,of the ,support 4 along the guides 3 of the frame l is effected in a correspondingway by the threaded shaft 17. This shaft engages the support 4 in a'nut 18, located below the table leaf 5 in a convnecting'piece between two beams 19 of the support, gripping around the table leaf.

In order to be able to control the displacement of the lightning case bythe rotation of the threaded shafts 14 and 17 various devices may be applied. j

As soon as the lighting Vcase is adjusted,

the negative may be pressed against the printing late by a separate device, operated `by a sha 21.

This shaft 21 bears at 22 and 23 i. in the end walls ofthe support 4 and is provided with a crank l24 by means of which it may be rotated." The support slides along said shaft and is provided `at its sides with, two; sets of bevel gear wheels 25, 26 and 27, 28. The

gears 25 and 27 slide ina known manner."

along a key-way in the shaft, in such a way,

that in any position by rotating the shaft,

they drive the gears 26 and 28 and thereby the shafts 29 and'130. Each of these shafts carries again a bevel gear wheel 31 meshing' `with-a wheel 32 provided with internal screw shaft 21 the inner portion 11 may in this way be lowered and the negative pressed against the printing plate. The spring 36 then acts as abuffer so that a gradual pressing is warranted. j

The attachment of `the negative lholding frame 12 to fthe inner portion 11 of the To the metal frameenclosing the glass plate 13, thel pieces 39 are `attached at two ,The rod 37 has its lower end By rotating the opposite sides. These pieces are dovetailed s aped and along the'same. the sliding straps 40 may be.I shiftedto and fro -by means of the screws 41, Fig. 6. The small 'set screws 42 are adapted to lock the screws 41 and, to

fiX. the straps 40 in a redetermined position. In the strapsi'40 t e sliding blocks`\43 are slidable to and fro. One of the sliding blocks is provided with a 'screw 44 for the reciprocation, and by means of the clamping screwsl 45, the sliding blocks may be fixed in a predetermined position.

In the sliding'blocks pins 46 are secured exactly fitting into corresponding holes 47 Fig. 4 of the brackets 38 of the inner portion of the` lighting lcase. The pins 46 may be.

slightly tapered at their ends to contribute to an easy entrance into their holes 47. By means of keys 48 the pins are prevented from "falling out and the negative holding frame is secured to the inner portion of the lighting ease.- l

Instead of the keys 48 other means maybe provided, to attach the negative holding frame to the lighting case. A.

In order to adjust a negativev one operates as follows. The frame 12 is entirely removed 'from the lighting case andlaid upside. down. The negative 2,0, provided with registering marks 55 indicating the two centre lines, is glued. to the glass plate 13 as exactly as possible by sight. Thereupon onetakes a cross ruler 58 Fig. 7 one leg of which is recesses in the lower face of the pins 46 and ,at a distance apart equal to that of the holes 47 of the innr portion of the lightingicase. One places the ruler 58 vwith the projections into the pins and in -general it will appear 'that the two sides of the ruler do nottally with the centre lines of the negative'. Now, by turning the screws 41. one aligns first the horizontal side' 56 (Fig. 6) of the ruler with the horizontal centre line of the negative and locks the sliding straps 40 by neans of the clamping' screws 42. .Thereupon one aligns the perpendicular side 57 (Fig. 6) of the ruler with the corresponding centre line of the negative. This is effected-by turning the screw 44, whereby the righthand pin 46 Instead o providingn only one of the slid- 'ing blocks 43 with .a set-screw, vboth blocks mav beprovided 'with a set-screw 44. "The `provided with projections 49, fitting into 'with its sliding block is carried along by thel will occur eX ctly parallel to the centre lines j i of the negate. lighting case is effected in the following way.

flip

y heads of the screws may have a toothed edge andsprings may be arranged determining the. rotation of the screws so that it is possible to turn both screws always the same angles.'

In order to turn the nega-tive 90, With,

out needing any further adjustment, the inner portion 1l of the lighting case is provided With two brackets 50 having holes 51, the distance between which. is exactly the same -as that between the holes 47 andthe connecting line which is perpendicular to the connecting line of the holes 47.

Having now particularly described and ascertained the nature of this invention and the manner in which the same is to be performed we declare that what We claim is:

l. In apparatus for printing negatives on sensitized printing plates; a lighting case and a detachable negative holding :trame l therefor, in combination with centering pins on the frame, means on the case into which said pins enter and means on the negative holdin-g frame to adjust said pins With respect to the negative.

2.`In apparatus for printing negatives on l sensitized printing plates; a lighting 'case neeting the centers of the holes on onepair and a detachable negative holding frame, in combination With brackets on the sides of the case lhaving pin-receiving holes, a line cono sides of said case being disposed rectangularly to a line connecting the centers of the holes on the other pair of sides, and

nieans on the frame to adjust the pins with respect to the negative center while main# taining the distanceY between said pins.

3. In apparatus for printing negatives on sensitized printing plates; a lighting ease and a detachable negative holding frame, in combination With brackets on the lighting case having holes therein, pins on the frame means to support the case including means to move the case in rectangular directions horizontally, in combinationv with a negative holding frame, pins on the frame detachably connecting the frame and case, means/to center the pins with respect to the center of the negative in the traine, and means to lower the case onto a sensitized printing plate, said lowering means including resilient cushioning means.

5. In apparatus for printing negatives on sensitized printing plates; a horizontal support having guides thereon, beams having guides thereon mounted on said former guides for traverse, a carriage traversib-le onsaid latter guides, a lighting case verti` cally movable in said carriage, brackets on two pairs of sides of said case having holes therein', a negative frame, pins on the frame for entering said holes, and means to adjust said pins with respect to said negative frame in rectangular directions Without changing the distance apart of said pins.

In testimony whereof we aitlx our signatures.

'FRANCISCUS GOMARUS MORTELMANS. WILLEM JOHANNES MEIJER. A

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