CS197525B1 - Device for guiding the sheets in the printing machines - Google Patents

Abstract

1531373 Sheet guiding POLYGRAPH LEIPZIG KOMBINAT FUR POLYGRAPHISCHE MASCHINEN UND AUSRUSTUNGEN VEB 17 Feb 1977 [27 Feb 1976] 06679/77 Heading B8R In a multi-station printing machine for first form or perfecting printing the stations being interconnected by guide cylinders 12-14 at least one of which has a sheet turning device, e.g. grippers 8, 9, sheets are guided by a blower 15 extending over the entire width of and below a portion of the feed path, and by guides 16 positioned between and displaceable transversely of the blower 15 and the feed path. Drive unit 21, by using chains, e.g. 22, positions the guides 16, which are linked together by a transmission shaft 23.

Description

BACKGROUND OF THE INVENTION The present invention relates to a device for guiding sheets in face-to-face printing machines with printing sets arranged one behind the other and interconnected by at least one transfer roller, in which a sheet-turning device as well as a device for supporting guided sheets are provided.

In face-to-face rotary sheet-fed printing presses operating on the principle of turning the sheet around its back side, the side of the sheet printed during face-up printing turns downward * and is transported from one printing set to the other in that position. Due to the relative movement between the printed side of the erch and the elements leading the aroh, the color smears ·

Guided sheet support devices are known, provided on printing machines for face and reverse printing of a low construction, for example according to the German Patent Document No. 57 345 _t, consisting of hollow arch guides of sheets arranged under printing sets from which air is blown under the sheets, move in hover to prevent blur of fresh proof. The disadvantage of this device, however, is that too much air flows from underneath the sheet, so that the air must be supplied in large quantities, which requires expensive air handling equipment. Nevertheless, the partial blowing of the sheet through the air poses the risk that the sheet edge will fold, create folds on the sheet and wrinkle the aroh. This machine is also applicable only to light paper, heavy paper

197 525

197 525 due to the uneven distribution of air flow and its own large basis weight, the paint drops and the paint smears at the same time. sheets ·

The purpose of the invention is to provide a device for guiding sheets in printing machines for face and reverse printing, which is inexpensive to manufacture and to operate.

The purpose of the invention is to provide a sheet-guiding device in face-and-face printing machines which is cheap to manufacture and operate.

SUMMARY OF THE INVENTION The object of the present invention is to provide a device for guiding sheets in printing machines for lion and reverse printing, which would enable processing of all types of paper in a range of all sizes without the risk of smudging and creasing of the sheets.

SUMMARY OF THE INVENTION The object of the present invention is to provide a sheet guiding device in face-to-face printing machines with successive printing sets interconnected by at least one transfer roller, in which a sheet-turning device as well as a guided sheet supporting device are provided. according to the invention, in that a blowing chamber with outlet openings is arranged under the sheet conveyor path along the entire width of the machine, and above it is located at least one adjustable arched sheet conductor, which can be adjusted transversely to the sheet conveying direction.

In order to ensure the transversal adjusting movement of the adjustable arch guides, the adjustable arch guides of the sheets are arranged on a roller carriage displaceable along the crossbar.

According to the invention, the drive of the wheel carriage is solved in two powerful ways: either the wheel carriage is connected to the transmission shaft by means of a adjusting chain, or the wheel carriage is connected to the actuator of the adjusting device by means of a flat chain

In order to securely support the sheets, according to the invention, the blowing chamber is provided on its outer sides and in the area of its curvature with a plurality of exit openings than in the other parts.

The device for guiding the sheets in the face and reverse printing machines according to the invention has the particular advantage that, in particular by a suitable combination of the blowing chambers and the adjustable arc guides of the corners, it enables the sheets to be guided from all types of paper in question. · It is easy to operate as well, because all of the adjustable arched sheet metal guides are arranged in a row in one row at the same time, with a single control operation ·

An example of an embodiment of the sheet guiding device in the face and reverse printing presses according to the invention is shown in the accompanying drawings, in which FIG. 1 shows the device schematically in side longitudinal section, FIG. 2 shows the adjusting device of the adjustable arch guide and FIG. 3 plan of the blowing chamber with one adjustable arched sheet carrier ·

197 525

The face and reverse printing press comprises a first printing set. 1 on the loading side, behind which the second printing set 2 and then the third printing set 2 are arranged. On the loading side of the printing machine there is further provided a loading table 6, a front catcher 2 and a sheet feeding roller 6. Each printing set is provided with a printing roller. 2, a plate roller 10 and a rubber roller 11. Between the first printing set 1 and the second printing set 2 there is provided a first transfer roll 12, designed as a reversing roll with two coordinated acting collector systems, each consisting of a series of suction catchers 8 and series of clamping grippers 2 · between the second printing assembly 2 and the third printing assembly 2, a second transfer Vale 13 · and finally, the third printing assembly 2 and ^e is located a third guide roller on the 14th

Under each transfer cylinder and in the illustrated example also below the printing cylinder 2 of the first printing set 1, there is one blowing chamber 15. Each exhaust chamber 15 is closed in all directions, extending over the entire width of the printing set. In the upper wall 18 of the blowing chamber 15, which is connected to a compressed air source (not shown), outlet openings 17 are formed perpendicular to the upper wall 18 of the blowing chamber 15. 17 larger than in other regions.

Adjustable arcuate conductors 16 of the sheets 20 are arranged above the blow chambers 15 in at least one longitudinal row. The adjustable arcuate conductors 16 forming a single row lie in a common vertical longitudinal plane and are connected to each other and are adjustable in the transverse direction, i.e. in the direction of the axes of rotation of the rollers. To adjust the adjustable arc conductors 16, an adjusting device drive 21, connected by means of a flat-chain chain 22, to a transmission shaft 23 »mounted in the machine frame 19, is arranged on the second printing set 2.

Adjustable arc conductors 16 are rigidly mounted on a roller carriage 26, which is movable perpendicularly 27 by means of three wheels 28. The roller carriage 26 is connected to a transmission shaft 23 by means of an adjusting chain 22. thrust rods 32 adjustable arc conductors.

According to another, not shown embodiment, the chain 22 with the flat articles directly connected to a trolley carriage 26. This is advantageous particularly in the processing of heavy paper or sheets of large ^eh ^ FORMTECH for ^{instance when it} es ^t and ^l e n ^e ^ e otooukové water ^at 16 JSO uspořtóáay ⁱⁿ expre l ^{of spraying} or kd ^{characterized} Nejaa from ^the ACTIVE cal ^reasons not ^{living p} ou le-transmission ^{rotary shaft} 23 © ^{UCE n} ^ l ^E *

First transfer cylinder 12 and formed as a deflecting roller, over the whole width of the machine ^opposite cl ^{en floes} tem, ^33rd both sides. The cover 33 is -tvoten uzavtenýrn sheath ^width s ^{characterized} shoulder ^h em ^d after the transfer of the arc periphery Valo 12th

Ab byle MO ^y single ^{E from} NO ^ tteta sets from each department ^of lit is divided transrnisrá · ^shaft 23 and the separating gaps 24 between the individual block sets is connected to flexible ties 25th

The device for guiding the sheets in the printing and facing machines according to the invention works

197 525

The sheet 20 is fed through a loading table - to the front gripper 2, which grabs sheet 20 and converts it to sheet. the loading roller 6, whereupon the printing roller 2 prints the sheet 20. Thereafter, the first transfer roll 12, formed as a reversing roll, turns the sheet 2p through. and the second transfer roller 13 transfers the sheet 20 to the third printing assembly 2, and then the third transfer roller 14 unloads the sheet 20 from the machine.

P ^of fig ^and price ^{s and d} when ^E is converted correction ^of c ⁱ M ⁱ in ^g LCI is ^no sheet ²⁰ facing freshly ^{e p bt} rotates ěnou Lions side down. Sd To avoid smearing, sheet 20 floats on a cushion of air, which originates from the airflow outlet 17 of the blowing chamber 15. Vol ^YS en ^{á h} ustota vystoprich holes. The edges ¹⁷ c ^h otoiastech ^{characterized} in ^YF at ^the EDGINGPROFILE Omori ^{y I to} U, as well as in its curvature ensures safe creating an air cushion and at these locations.

Simultaneously, the sheet 20 slides on the displaceable arc conductors 16 which is thereby dp p ^{o i} r ^and n.δad ^and over ^the in: Ltelnýc ^h c ^{h ý} arc conductors 16 is established ^ZDY of happiness, where ^p s facial print arises -archu 20 continuous unprinted strip.

At. change ^{of some} field ^H y nonfood ^{same eh} n o ^p u ru ^h at Hci arc ^h u. ^{20 of} Ada adjustable arc conductors I6 moves to a new location using the actuator 21 of the adjusting device, which drives the chain 22 with the flat articles which rotates the transmission shaft '23 and one with přestavovariho SOLUTION ^I zu ²⁹ poh ^yb U is the ^ & ew vozcem 26 ^p e traverse 2 ⁷ .

arranged ^{in series and} Replaced ^nus te ^l NYC ^h a ^{h b} loukovýc conductor 1e ^{in some} Koli and ^the rows ^and their ch ^p represents ocations' right chain 22 with flat articles.

Claims (5)

OBJECT OF THE INVENTION First ferizeri.pro management ^and arc ^Hu thousand ^to ADR ^{ký machines-I} C ^h for Hcri and R ^b n sk ^{and those} with ^{three to} в c ⁱ M ⁱ sets are arranged in succession and interconnected by at least one handover Valo where a means is provided for turning ArOH and device for podepí ^R or guided sheets vyznafoj ^^ TFO is that after the ^d to ^{i d LEGAL} Raho sheets is over s ^ ce machines arranged ^order ána NEJM Step ^{E to} one vyfukovari omora. (W with an output on the bores (I ^{7), and} the ^tup is uristta ^least one ^p res ^t, and ^it e ^l ed and ^bl ou ^to ov ^Y in ^{di 'is} C · ⁽¹⁶⁾ ArOH ^{s (20), an} old ^ transverse to the direction of transport of corners (20). ² . Glare ^{and DRIVING p} ccording ^b ODU ^- 1, ^{y brand} uj ⁱ c ⁱ is tL · ^Pr es ^t, and ^even of the ^l n ^e o ^BL oukov ^s Water ^{Ice (1 6)} ARO ^{Choo (20)} are arranged ^R & ^d Erasing ^{the s O L L} e ^No metal vehicle in ^{Cart (26)} adapted ^em pornvně -traverzy according to (27). 3. Apparatus according to claim 2, characterized in that the roller carriage (26) with přestavovariho chain (2 ⁹⁾ connected ^to transirisnimu hHde ^ ⁽² 3), ^kt era is connected to a pontoon ⁽²¹⁾ of the adjusting device. 4^andzen^{í p}from^lE^bodu 2, v ^ na ^^^ se tta, that ko^lE^čkov^ý voz^{ík (26)} is ex^andpojeⁿ к po the adjusting device (21) by means of a chain (22) with flat links. 197 525 Device according to claim 1, characterized in that the density of the outlet openings (17) on the outside and in the area of curvature of the exhaust chamber (15) is greater than in the other areas thereof.