WO1995001260A1

WO1995001260A1 - Printing machine, especially web-feed screening machine

Info

Publication number: WO1995001260A1
Application number: PCT/EP1994/002097
Authority: WO
Inventors: Gerhard Klemm
Original assignee: Gerhard Klemm
Priority date: 1993-06-30
Filing date: 1994-06-28
Publication date: 1995-01-12
Also published as: DE4321738A1

Abstract

A printing machine, especially a web-feed screening machine, has a plurality of printing stations (160, 160') through which the web to be printed (150) pass in the longitudinal conveying direction. The printing stations (160, 160') are arranged side-by-side transversely to the longitudinal conveying direction. The drying stations (161, 161') succeeding the printing stations are passed through by the web transversely to the longitudinal conveying direction which is determined by the passage through the printing stations. The web is deflected from the longitudinal to the transverse conveying direction by idler rollers, the axes of rotation of which are arranged in the projection direction on a horizontal plane at 45° to both the longitudinal and transverse conveying directions.

Description

PRINTING MACHINE, ESPECIALLY ROLL SCREEN PRINTING MACHINE

TECHNICAL AREA

The invention relates to a printing press, in particular a roller screen printing press according to the preamble of claim 1.

STATE OF THE ART

In printing machines of the type presumed to be known, all printing stations are passed through in a common longitudinal conveying direction by the web to be printed. The conveying path of the web of material through the individual printing stations, which is projected onto a horizontal plane, is regarded as the longitudinal direction.

The control and operation of the individual printing stations in such an arrangement is cumbersome because the operator's direction of access to the individual printing stations is transverse to the direction of movement of the web. The operator therefore does not have a clear view of the goods printed in the individual stations, but instead has to partially dive into the free spaces between the individual stations. It is nevertheless possible to overlook several printing stations at the same time. THE INVENTION

The invention is therefore based on the object of designing a printing press of the type presumed to be known in such a way that there is good clarity for the operator over several stations.

Another object of the invention is to reduce the overall length of such machines with drying stations compared to conventional machines and to maintain a good overview of the individual printing stations.

These tasks are solved with the features of the characterizing part of claim 1 or claim 2.

Preferred embodiments of the invention are described in the further subclaims.

The arrangement of the printing stations next to one another transversely to the longitudinal direction, and preferably aligned at 90 ° to the longitudinal direction, creates brilliant overview conditions for the operator, who can overlook the quality of the print in several printing stations from a single place. In this case, the control panel for the individual printing stations can be provided directly next to the web running at the front of the individual stations, so that the operator can make the necessary adjustments and corrections in the simplest way and with a completely unobstructed view of the web. This also results in shorter operating paths for the operator. There is also the great advantage that, because the individual printing stations are arranged closely side by side, it is possible to work with a common central drive without having to fear torsional effects which are unavoidable in the case of a large overall length and are therefore accurate make synchronizing individual drives of the different printing stations necessary.

If drying stations are provided on machines of this type, they are passed through the web in each case transversely to the longitudinal direction. Such an arrangement considerably reduces the overall length of a printing press with drying stations when the drying stations, according to a further feature of the invention, overlap the printing station in a portal-like manner and the web area passing through the drying station and the web area located in the upstream printing station, possibly several times, circulates. If necessary, extremely long drying lengths can be accommodated in such an arrangement without increasing the space requirement of the printing press accordingly.

BRIEF DESCRIPTION OF THE DRAWING ILLUSTRATION

Further features of the invention are described in the further subclaims and also result from the following description in conjunction with the drawing, which shows a preferred embodiment of the invention. demonstrate :

Figure 1 - a perspective view of a roller screen printing machine with two printing stations and two drying stations connected downstream, Figure 2 - a schematic side view in the direction of arrow II of Figure 1 on the first printing station, Figure 3 - a view according to III - III in FIG. 2 shows the deflection area and the start of the drying station downstream of the first printing station,

4 shows a schematic representation of the course of the web in the first drying station from the operating side, that is to say in the direction of the arrow IV according to FIG. 3, FIG. 5 shows a top view according to V in FIG. 4 of the deflection point between the first drying station and the second printing station,

Figure 6 - a schematic view in the direction of

Arrow VI according to FIG. 5, FIG. 7 - a representation of the web course and the roller arrangement in the second printing station, which is analogous to FIG. 2,

FIG. 8 - a schematic view in the direction of arrow VIII according to FIG. 1 onto the winding area, FIG. 9 - a representation analogous to FIG. 3 in plan view according to IX - IX in FIG. 7, Figure 10 - a representation of the second drying station 161 'analogous to Figure 4.

BEST WAY OF CARRYING OUT THE INVENTION

In the drawing, the same or corresponding parts are provided with the same reference numerals. They differ from one another only in that they are each provided with prime lines at the second printing station and second drying station.

The embodiment shown shows a roller screen printing machine with two printing stations 160 and 160 'arranged next to one another and two drying stations 161 and 161'.

A web 150 is drawn off from a supply roll 101 and overflows the rollers 102 and 103 and a splicing table 153 located between them.

A web loop X- is provided between the roller 103 and an adjacent roller 104. After the roller 104, the deflection rollers 105 and 106 are rotated, as well as a counter-pressure roller 152 which interacts with a screen 151 and a doctor blade 152. After the counter-pressure roller 107 has passed over, the web 150 passes over the deflection roller 108 to the dancer roller 109, which in the direction of the is shown in Figure 1 double arrow, that is in a horizontal plane, forwards and backwards. The dancer roller 109 is followed by the deflection roller 109a. Their axis of rotation runs at 45 ° to both the longitudinal direction 162 and the transverse conveying direction 163.

After the web 150 has been deflected in the transverse conveying direction 163, the first drying station, designated overall by 161, is passed through. This drying station has rollers 110 to 119 arranged one after the other at corner points of a rectangle, the axes of rotation of which are all aligned parallel to one another and to the longitudinal direction 162. After the roller 119, a deflection roller 120b is first rotated, the axis of rotation of which runs at 45 ° to both the longitudinal direction 12 and the transverse conveying direction 163. After the deflection from the transverse conveying direction 163 into the longitudinal conveying direction 162, the web 150 rotates around the two rollers 120 and 120a. A web loop X "is formed behind the roller 120a. After the web loop X _? the second printing station 160 'is run through in the same way as the first printing station, the schematic structure of which can be seen in FIG.

For a description of the second printing station 160 ', reference may therefore be made to the description in connection with FIG. 2. The structure of the second printing station 160 'which can be seen in FIG. 7 corresponds behind the material web loop X, identical to the structure of the first printing station 160 after the material web loop X,.

The subsequent articulation point in FIG. 9 also corresponds identically to the structure in the first printing station 160, as can be seen in FIG. 3. Finally, the structure of the downstream second drying station 161 'is identical to that of the first drying station 161 shown in FIG. 4.

Because of the identical structure and function, a supplementary description of the machine parts shown in FIGS. 9 and 10 is also unnecessary.

After the deflecting roller 119 ', a roller 121 is run over, behind which a web loop X is formed. The winding, which is formed by the rollers 122, 123, 124 and the winding shaft 125, adjoins this web loop X-.

The axes of rotation of all the rollers according to 110 * run parallel to one another and parallel to the longitudinal direction 162 or 162 '.

The longitudinal conveying direction 162 and the transverse conveying direction 163 are arranged at an angle of 90 ° to one another.

Claims

PATENT CLAIMS:

1. Roller screen printing machine with a plurality of printing stations passed through by the web to be printed in the longitudinal direction with a doctor blade movable in the longitudinal direction, characterized in that the printing stations (160; 160 ') transversely to the longitudinal direction (162; 162') are arranged side by side.

2. Roll screen printing machine according to claim 1, characterized in that the printing stations (160; 160 ') adjoining drying stations (161; 161') of the web (150) each transverse to the passage through the printing stations (160 ; 160 ') certain longitudinal direction (162; 162').

3. Roll screen printing machine according to claim 1 or 2, characterized in that the web (150) by means of deflecting rollers (109a;

109a ') is deflected from the longitudinal to the transverse conveying direction (163; 163') or vice versa, the axes of rotation of which in the projection direction are below a horizontal plane

45 ° are inclined to both the longitudinal and transverse conveying directions.

4. Roller screen printing machine according to one or more of claims 1 to 3, characterized in that the drying stations (161; 161 ') overlap the printing stations (160; 160') like a portal and the web area passing through the drying station and the web located in the upstream printing station ¬ area, possibly several times.

5. Roller screen printing machine according to one or more of claims 1 to 4, characterized in that the drying stations (161; 161 ') each have deflection rollers (110 to 118; 110' to 118 ') in the two upper and lower lateral corner areas, whose axes of rotation extend in the longitudinal direction (162; 162 ').