DE10002739A1 - Machine for color printing paper web on both sides employs two printers back to back with withdrawable printing roller assembly - Google Patents

Abstract

The machine consists of two identical color printers (1,1) with the paper web (8) passing in opposite directions (a,b) through the printing rollers. Each ink regulating unit (3) is controlled by a computer according to the ink viscosity, web speed and amount of ink to be applied. The printing rollers form a removable assembly

Description

The invention relates to a machine for double-sided dyeing of paper webs.

DE 196 48 567 A1 describes a one-sided machine Printing on a strip of cigarette paper in one Cigarette rod machine described. The one from a bobbin peeled, to be printed cigarette paper strips overflows a deflecting roller to a printing roller of a printing unit whose jacket the printed image is applied. The print roller passes the color contained on the printed image on Point of contact with a counter pressure roller on the through the Gap running between the pressure roller and the counter-pressure roller Cigarette paper strips, on which a corresponding imprint is applied. The ink is transferred from a cartridge a paint line in an applicator with a spray nozzle passed from which a color liquid-air mixture into the gap between two touching, rotating feed rollers occurs, the application device compressed air for atomizing the paint liquid discharged from the nozzle is supplied. The a feed roller, a so-called distributor roller, gives up its circumference from a transfer roller, the transfers the printing ink to the jacket of the printing roller.

EP 0 648 289 B1 describes a machine for one-sided use Coloring of paper webs known in the order of a paper web a counter-pressure roller of a printing unit rotates over the Paper web interacts with an ink roller that works together with the counter pressure roller is installed in a roller drive. The  Ink roller works with a first one lying below this Intermediate roller together, which in turn with one underneath lying second intermediate roller cooperates, which in turn with an ink fountain roller cooperates, some of which in the Color is immersed in a paint container. Every other roller starting from the movably mounted ink roller is also movably mounted. Such storage of the rollers enables the drive of all rollers of the printing unit through the running paper web.

The invention has for its object a machine for to develop double-sided inking of paper webs characterized by a simple and inexpensive construction.

According to the invention, this object is achieved by a machine with the features of claim 1.

The sub-claims contain advantageous and expedient Developments of the invention.

The invention is based on a schematic Drawing of a machine for double-sided coloring of Paper webs explained.

The machine for double-sided dyeing of paper webs consists of two color printing units 1 , 1 of the same construction arranged one behind the other.

The color printing units 1 , 1 are installed in housings 2 , 2 and, depending on the width of the paper web 8 to be colored or the type of pattern to be colored, with one or more metering units 3 with one or more spray nozzles 4 for spraying paint onto a metering roller 5 , a cooperating with this distribution roller 6 for evenly applying the ink to an ink roller 7 for dyeing the top 8 a or the bottom 8 b of a paper web 8 , which passes through the two ink printing units 1 , 1 in the opposite direction a, b, one with the Ink roller 7 cooperating counter-pressure roller 9 and adjusting devices described below for adjusting the gap width of the gaps 10-12 formed between the individual rollers 5 , 6 , 7 , 9 equipped.

The color printing units 1 , 1 can be equipped with ink rollers 7 with a smooth surface for the full-surface dyeing of paper webs 8 or with ink rollers 7 with a profiled surface for applying color samples with straight stripes, wavy lines and the like. Signs on paper webs 8 .

Each metering unit 3 is preceded by a control valve 13, controlled by an electronic computer as a function of the color viscosity, the speed of the paper web 8 to be colored and the amount of ink to be applied, for regulating the amount of color liquid supplied to the metering unit 3 under pressure.

The dosing unit 3 or dosing units of each color printing unit 1 is or are arranged on a carriage 14 which can be moved out of and into the machine housing 2 .

Metering roll 5, distribution roller 6, the inking roller 7 and the platen roller 9 are switched in a separate, into and out of the machine housing 2, the color printing units 1, 1 and stored extendable frame 15th Swivel arms 16 , 17 for the distribution roller 6 and the counter-pressure roller 9 with spindle drives 18 , 19 for adjusting the gap width of the gaps 10-12 formed between the rollers 5 , 6 , 7 , 9 of the color printing units 1 , 1 are installed in the movable frame 15 . Furthermore, an interchangeable cassette 20 is used in the frame 15 for collecting excess ink under the rollers 5 , 6 , 7 , 9 .

With the help of the movable frames 15 , the rollers 5 , 6 , 7 , 9 of the color printing units 1 , 1 can be serviced in a simple manner and the color printing units by installing an inking roller 7 with a smooth or profiled surface for a full-surface coloring of paper webs 8 or printing on the Paper webs can be equipped with color patterns such as stripe patterns or wavy line patterns.

The to be dyed paper web 8 runs from a not shown reel off passes for inking the paper web top 8 of a first color printing unit 1 in the arrow direction A and for inking the paper web underside 8 b the second color printing unit 1 in the direction of arrow b and then to print with a label and / or run into a printing press with images. Metering roller 5 , distribution roller 6 , ink roller 7 and counter-pressure roller 9 of the two ink printing units 1 , 1 are driven by the continuous paper web 8 .

With a corresponding equipment of the color printing units 1 , 1 with several dosing units 3 , the same color or different. Colors are filled, and profiled ink rollers 7 , paper webs 8 on the top 8 a and the bottom 8 b z. B. with colored stripes or wavy lines of the same or different color, the same or different width and the same or different distances.

The required gap setting between the rollers 5 , 6 , 7 , 9 of the color printing units 1 , 1 for a certain paper type, color type and a certain color sample can be stored in a computer, so that when producing paper webs 8 with the same color, color type and paper type the required gap adjustment of the rollers can be carried out with the aid of the computer-controlled spindle drives 18 , 19 .

Instead of spindle / linear drives, eccentrics for the Gap adjustment of the rollers are used.

The above-described machine for double-sided dyeing of Paper webs can be used to apply fragrances and adhesives on paper webs made of different types of paper and paper like materials like. Wallpaper and corrugated cardboard used become.

The machine can also be used with a color printing unit one-sided dyeing of paper webs are operated.

In a further embodiment of the machine for inking paper webs 8 , it is equipped with one or more metering units 3 which are arranged above the metering roller 5 or the inking roller 7 and whose distance 21 from the respective roller surface can be adjusted. With a machine of this type, it is possible, using a paint roller 7 with a smooth surface, to equip the metering units 3 with a corresponding number of nozzles and to set the corresponding distance 21 of the metering units 3 from the surface of the metering roller 5 or the ink roller 7, paper webs 8 to color the entire surface with a color pattern of straight stripes, wavy lines, or the like. signs or the paper paths 8. Such a machine is characterized by the advantage that it is not necessary to retrofit the machine by exchanging ink rollers with a smooth surface for those with a profiled surface when converting the production of all-over colored paper webs to paper webs with a color sample.

The machine can be used for the production of label printing, Cardboard printing and for coloring wallpaper strips with individual color and pattern design can be used.

Operation of the machine together with one by one electronic computer controlled printer opens up the Possibility of form paper with the desired color ink and then print, so that a purchase of colored paper in large quantities is no longer required.  

Reference numerals

1

Color printing unit

2nd

Housing of

1

3rd

Dosing unit

4th

Spray nozzle from

3rd

5

Dosing roller

6

Distribution roller

7

Ink roller

8th

Paper web

8th

a top of

8th

8th

b underside of

8th

9

Counter pressure roller

10th

Gap between

5

,

6

11

Gap between

6

,

7

12th

Gap between

7

,

9

13

Control valve

3rd

14

Sled by

3rd

15

Frame for

5

,

6

,

7

,

9

16

Swivel arm for

6

17th

Swivel arm for

9

18th

Spindle drive from

16

19th

Spindle drive from

17th

20th

Exchange cassette

21

Distance from

3rd

to

5

respectively.

7

a running direction of

8th

b Direction of

8th

Claims (13)

1. Machine for double-sided dyeing of paper webs, characterized by at least two color printing units ( 1 , 1 ) of the same construction arranged one behind the other and an opposite direction (a, b) of one or more paper webs ( 8 ) through the two color printing units ( 1 , 1 ). 2. Machine according to claim 1, characterized in that the color printing units ( 1 , 1 ) depending on the width of the paper web to be colored ( 8 ) or the type of pattern to be inked with one or more metering units ( 3 ) with one or more spray nozzles ( 4 ) for spraying paint onto a metering roller ( 5 ), a co-operating distribution roller ( 6 ) for evenly applying the paint onto an ink roller ( 7 ) for dyeing the top and bottom ( 8 a, 8 b) of a paper web ( 8 ), a counter-pressure roller ( 9 ) interacting with the inking roller ( 7 ) and adjusting devices for adjusting the gap width of the gaps ( 10-12 ) formed between the individual rollers ( 5 , 6 , 7 , 9 ). 3. Machine according to claim 1 and 2, characterized by ink rollers ( 7 ) of the color printing units ( 1 , 1 ) with a smooth surface for full-surface dyeing of paper webs ( 8 ). 4. Machine according to claim 1 and 2, characterized by ink rollers ( 7 ) of the color printing units ( 1 , 1 ) with a profiled surface for applying color patterns with straight stripes, wavy lines and the like. Signs on paper webs ( 8 ). 5. Machine according to one of claims 1 to 3, characterized by one or more metering units ( 3 ) with adjustable distance ( 21 ) to the metering roller ( 5 ) or inking roller ( 7 ) for spraying on color patterns with straight stripes, wavy lines and the like the smooth roller surface. 6. Machine according to one of claims 1 to 5, characterized by one of the dosing units ( 3 ) upstream control valve ( 13 ) for controlling the dosing unit ( 3 ) supplied under pressure amount of color liquid. 7. Machine according to one of claims 1 to 6, characterized by a storage of the metering roller ( 5 ), the distribution roller ( 6 ), the inking roller ( 7 ) and the counter-pressure roller ( 9 ) in a separate, in and out of the machine housing ( 2nd ) of the color printing units ( 1 , 1 ) retractable and extendable frame ( 15 ). 8. Machine according to claim 7, characterized by an exchangeable cassette ( 20 ) arranged in the movable frame ( 15 ) for collecting excess paint. 9. Machine according to claim 7 and 8, characterized by in the movable frame ( 15 ) built-in swivel arms ( 16 , 17 ) for the distribution roller ( 6 ) and the counter-pressure roller ( 9 ) with spindle drives ( 18 , 19 ) for adjusting the gap width between the rollers ( 5 , 6 , 7 , 9 ) of the color printing units ( 1 , 1 ) formed column ( 10-12 ). 10. Machine according to one of claims 1 to 9, characterized by a drive of the metering roller ( 5 ), the distribution roller ( 6 ), the inking roller ( 7 ) and the counter-pressure roller ( 9 ) by means of the paper web running through the inking units ( 1 , 1 ) ( 8 ). 11. Machine according to one of claims 1 to 9, characterized by a motor drive of at least one of the rollers ( 5 , 6 , 7 , 9 ) of the color printing units ( 1 , 1 ), preferably the inking roller ( 7 ). 12. Machine according to one of claims 1 to 11, characterized by an arrangement of the metering unit ( 3 ) or the metering units on a from and into the machine housing ( 2 ) extendable and retractable carriage ( 14 ). 13. Machine according to one of claims 1 to 12, characterized characterized in that this one by an electronic Computer-controlled printer is connected upstream.