DE419368C - Head press for simultaneous printing and cross-cutting of a web pulled from the roll - Google Patents

Description

removed web.

The invention relates to a head press for simultaneous printing and cross cutting a web pulled off the roll and has a device as its object, with the help of which printing sheets can be produced on such head presses which are exactly the same length among themselves and where the print always has exactly the same distance from the edge. The invention exists in that on both sides of the printing table two pairs of cross cutting knives stationary or are arranged adjustable, after the resiliently mounted printing block on the Has put the web of material on, from the advancing push button by means of stops be pressed down to cut sheets of exactly the same length.

In the drawing, an embodiment of the subject matter of the invention is shown schematically. For a better understanding, all parts which are not directly part of the subject matter of the invention and which are assumed to be known have been omitted. They represent:
Fig. Ι the schematic longitudinal section,

Fig. 2 shows a cross section along the line AB of Fig. 1 and

Fig. 3 is a view of a pair of cross cutting knives.

The strip of material is removed from a roll, not shown here, in a known manner ι fed in jerks to the pair of draw rollers 2. On both sides of the printing table 3 knife pairs 4 and 5 or 6 and 7 are arranged; the lower knives 4 and 6 are rigidly attached to the printing table 3, while the upper knives 5 and 7; the lower blades are attached to pivot around the pin 8. The pair of pulling rollers 2 j leads the strip of material 1 over the printing table 3 so that it is slightly over the bottom knife 6 protrudes. Compression springs 9 press the upper cutters 5 and 7 against the stops on the lower cutters 4 and 6 10, which keeps the knives in the open position. The coloring of the printing block takes place in a known manner not shown here by oscillating Applicator rollers.

During the printing process while the material web is at a standstill, the is lowered Print head 13 and brings the printing block under the action of compression springs 12 11 on the material web 1 'for printing.

As the printhead 13 is lowered further, wherein the printing block 11 moves in guides of the print head 13, the press on the print head seated stops 14 on the upper knife 5 and 7 and cause a simultaneous double cross-section of the material web.

This creates a waste at the front end of the material web that causes the inaccuracies of the jerky feed.

The resulting printed sheets, which are exactly the same length and are even Have edge distance are by a pair of conveyor rollers 15 from the printing table Conveying roller pair 16 supplied, which stores the printed sheets in a collecting container. The drive of the individual parts of the machine takes place in known, not shown here Way.

The device can be expanded by the fact that the precision print and cut on the strip of material 1 various other operations, w ^r ie z. B. perforating, slitting, multi-color printing and numbering, precede.

Claims (1)

Patent claim: Head press for simultaneous printing and cross cutting one of the Roll withdrawn web, characterized in that to achieve exactly the same length of printed sheets with exact edge distance on both sides of the printing table (3) two pairs of cross cutting knives (4, 5 and 6, 7) are fixed or adjustable, after which the resiliently mounted printing block (11) has placed on the web of material (1) from the moving one Print head (13) by means of stops (14) to achieve the cutting process to be depressed.