US1812514A - Varnishing and printing machine for bands - Google Patents

Description

June 30, 1931. R sT 1,812,514

VARNISKING AND PRINTING MACHINE FOR BANDS Filed April 23, l930 2 Sheets-Sheet l June 30, 1931. K. CHRISTIAN 1,812,514

VARNISHING AND PRINTING MACHINE FOR-BANDS Filed April 23; 1930 2 Sheets-Sheet 2 gwumioc' (Riot/nu,

Patented June 30, 1931 PATENT OFFICE KUNO CHRISTIAN, BAD SODEN ON TAUNUS, GERMANY I VABNISHING AN D PRINTING MACHINE FOR BANDS Application filed April 23, 1930, Serial No. 446,602, and in Germany June 25, 1928.

A continuous process for printing sheets of cardboard, celluloid .or the like, has been known prior tothe present invention. In the machines used in the industry cylinders are used which permit only definite printing area because the sheet is in continuous motion and therefore for each separate printing area, cylinders of definite diameter are necessary. The present invention overcomes this disadvantage, particularly when continuously movin strips of sheet metal are used, in that the printing area is variable withincertain limits and that the individual printing areas lie in close proximity to each other on the continuous sheet of material, without efi'acement of the print and without waste of material.

The invention is illustrated by way of example in the accompanying drawings.

Fig. 1 shows the new printing machine with a continuously moving sheet of material to be printed and perforated and with various, interchangeable printing apparatus.

Fig. 2 shows the finished article.

Fig. 3 is a more detailed view of the printing machine shown in Fig. 1, in which the reversing mechanism controlling the reverse movement of theimpression cylinder and the perforating apparatus is illustrated.

Fig. 4 is a plan view of the device shown in Fig. 3.

The machine, in the construction shown in Fig. 1, consists of a plate cylinder 1 (with inking device above), a rubber cylinder 2 and an impression cylinder 3. By means of the inking devices 4 and 5' this machine can also be used for varnishing, while the cylinders 1 and 2 together with the inking devic are disconnected, so that the sheet of material may be varnished simultaneously on both sides. The sheet 01 is guided by a perforating apparatus 6 which consistsof two adjustable discs 6 provided with teeth (e) according to the breadth of the sheetof material and two counter-discs 7- provided with-corresponding recesses 7. These perforating discs 6 with counter-discs 7 are employed to guide the sheet, as well as to perforate it (Fig. 2). Perforating and guiding are thus combined. While the cylinders 1 and 2 continue to rotate in the same direction, the pressure cylinder 3 comes out of contact with the circumference of the cylinder 2 between the ends a, "b of the printing area after the end of the printing, while the sheet d still proceeds a further short distance. 3, 6 and 7 then come to a stand-still in orderwto execute a controllable backward movement during the interval in printing to compensate for the intermediate space a--b. Before the beginning of the next impression, that is before the pressure cylinder 3 is pressed against the printing surface of the rubber cylinder 2, the perforating apparatus 3, 6, 7 begins its forward movement again (with the speed of the cylinders 2, 3 so that an, effacement of the print on the sheet of material is avoided, and the new print beginning, and the end of the previous print lie close together. The perforations g on both sides of the sheet d, and the guiding by the perforating apparatus 6, 7 insures that if the band is passed several times through the machine, printing is effected exactly at the desired place. Any desired manner of perforation may be used.

If, for example, the cylinders 1 and 2 are operatively connected by means of gears which each have about '60 teeth, and if the printing area corresponds to 40 teeth, the pressure cylinder 3 continues to move forwardly about 3 teeth after the end of the printing, then stops and begins a backward movement of about 6 teeth. 3 teeth before the next print be ins, the pressure cylinder 3 with disks 6 and? again begin their'forward movement, so that an efiacement of the print at'the beginning and end of the printing area is prevented in all cases. This backward and" forward movement of the sheet metal band thus takes place while the rubber and plate 9 cylinders continue to turn through about 20 teeth during the interval of printing.

Through this movement, at the second, and subsequent rotations of 2,the linea of Fig. 2 comes to lie on, or near to the line I), while with continuous rotation the distance a, 6 shown in Fig. 2 would be present between the separate impressions, according to the ends a, b, on 1, 2 in Fig. 1. The average distance between the holes of the marginal perforation of the sheet metal band corresponds to the pitch of the toothed wheels.

The operation of the reversing mechanism to which the impression cylinder andthe perforating apparatus arev responsive is il-' lustrated'by Figs. 3and 4. On the extended shaft of the rubber cylinder 2 outside the frame, there is a pinion 9 with a section of interrupted, discontinuous gear teeth as shown. The pinion 9 engages pinion 10. on the shaft of the printing cylinder 3 outside the frame. This again im els pinions on the extended shafts of the perfbratmg apparatus 6 and the feminal punching disks 7; Moreover,the pinion 9 is provided with a lateral cam 11 carrying a roll 12. The said roll is fitted on a lever 13, which is arranged in a rotary Wa in a pin 14 fastened to the bracket. 11 its periphery, the lever 13 has a cogged rim, which engages the cogs of a segm'ent 15 and imparts to the latter a movement that causes it to move forwardly and backwardly in a manner corresponding to the form of the cam 11. The pinion 10 as well as disks having peripheral teeth and counterdisks having a plurality of recesses registering with the teeth of the first named disks, an impression cylinder, a rubber cylinder and means for successively rotating the said im- ,pression cylinder and perforating mechanism forwardly and reversely. v y

In testimony whereof I have afiixed my signature. KUNO CHRISTIAN.

26 the cogged segment 15 are supplied with a a lateral clutch mechanism 23, by meansof which they can be coupled with each other through an axial displacement of the cogged segment 15. This coupling and uncoupling I 3 is effected by the doublelever 16, which is arranged in a rotary way in the pin 17 fastened to the bracket. At its one end the lever 16 bears two rolls 18 running at both sides of the pinion 9. By means of the'said rolls the lever 16 is guided by two cams 19 and 20 lo- 'cated on the sides of the pinion 9. At the other end of the lever 16 a ring segment 21 40 the cog ed se ent 15' The groces df workm Shortly before finishing t e print, when the last tooth of the pinion 9. with a discontinuous rim is still engaging the pinion 10, the lever 13 has set the cogged segment 15 in a is the following. I

is provided, fastenedto the lever with a screw and runnin in a groove 22 in progressive motion owing to th form of the After the coupling has been'efi'ected the last- 1 tooth of 9 will leave the rim of. 10, so that the 7 cam 11 can start the reverse motion of 13, 6

cm lleflects the progressive motion in the same manner, and as soon as the first tooth of engagement with the pinion 10,'the cam 19 will effect the disengagement by means of the lever 16.- 1

.WhatIclaim is: p

In combination with a printing machine, means for perforating and guiding a continand 7. Before the next print is'begun, the

thediscontinuous rim: of the pinion 9 isin v uous web of stiff sheet material, comprising

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