DK167312B1

DK167312B1 - Rotatable cutting cylinder

Info

Publication number: DK167312B1
Application number: DK606187A
Authority: DK
Inventors: Thomas J Rosemann
Original assignee: Thomas J Rosemann
Priority date: 1987-11-18
Filing date: 1987-11-18
Publication date: 1993-10-11
Also published as: DK606187A; DK606187D0

Description

i DK 167312 B1in DK 167312 B1

Den foreliggende opfindelse angår en roterbar skærecylinder som angivet i den indledende del af krav 1.The present invention relates to a rotatable cutting cylinder as set forth in the preamble of claim 1.

Roterbare skærecylindre er hidtil blevet fremstillet ved tildan-ning af en cylinder for eksempel i en drejebænk. Der tilvejebringes her-5 efter en spalte på langs i cylinderen til at optage en skæreliste. Herefter fræses flere tangenti ale indsnit eller noter i cylinderen, hvilke indsnit grænser op til spalten. Indsnittene arrangeres fordelt hen langs spalten. Indsnittene fræses omhyggeligt, således at indsnittenes basisflader er plane og parallelle med spaltens vægge. Et gevindskåret hul 10 tilvejebringes i spalten gennem fladen ved hvert indsnits basis. Herefter skrues sætskruer ind i hullerne i spalten for at gå i indgreb med skærelisten og fastholde den i spalten.Rotatable cutting cylinders have heretofore been produced by forming a cylinder, for example, in a lathe. Here, there is provided a longitudinal slot in the barrel to receive a cutting mold. Thereafter, several tangential cuts or grooves in the cylinder are milled, which cuts adjacent to the slot. The incisions are arranged along the gap. The incisions are carefully milled so that the base surfaces of the incisions are flat and parallel to the walls of the slit. A threaded hole 10 is provided in the slot through the surface at the base of each incision. Then, set screws are screwed into the holes in the slot to engage the cutter bar and hold it in the slot.

Der kræves adskillige forskellige arbejdstrin til fremstilling af roterbare skærecylindre af denne art. Fremstillingen af de kendte skære-15 cylindre er således både tidskrævende og kostbar, og kræver kostbart udstyr og dygtigt håndværk. De således fremstillede roterbare skærecylindre er derfor meget kostbare.Several different work steps are required to produce rotatable cutting cylinders of this kind. The production of the known cutting cylinders is thus both time-consuming and expensive, and requires expensive equipment and skilled craftsmanship. The rotatable cutting cylinders thus produced are therefore very expensive.

Fra US patent nr. 3 935 774 kendes en roterbar skærecylinder, hvori der er udformet en langsgående spalte til at optage en skæreliste, 20 og hvor der er fræset en tangenti alt forløbende flade ved spaltens ene side. Skærelisten fastholdes af en holdeliste, der spændes an imod den tangentialt forløbende flade med skruer, som går ind i gevindskårne huller i den tangentialt forløbende flade. Fremstillingen af en skærecylinder af denne art er tidskrævende og kompliceret, og den således frem-25 stillede roterbare skærecylinder er derfor forholdsvis kostbar.From US Patent No. 3,935,774 there is known a rotatable cutting cylinder, in which a longitudinal slot is formed for receiving a cutting strip, 20 and a tangential surface extending all the way on one side of the gap is milled. The cutting strip is held by a retaining strip which is clamped against the tangentially extending surface with screws which enter threaded holes in the tangentially extending surface. The manufacture of a cutting cylinder of this kind is time-consuming and complicated, and the rotatable cutting cylinder thus produced is therefore relatively expensive.

Fra US patent nr. 4 475 425 kendes en roterbar skærecylinder omfattende en langsgående spalte til at optage en skæreliste. Skærelisten indspændes i spalten ved hjælp af to tynde, modsatrettede kiler, som begge forløber over hele skærelistens længde. Skærelisten opspændes ved 30 akseparallel forskydning af kilerne. Ved denne indretning vil det være vanskeligt at opspænde skærelisten i den ønskede position, fordi skærelisten vil være tilbøjelig til at forrykkes, når kilerne forskydes. Det kan ved denne indretning være vanskeligt at sikre, at til spændingskraften er ensartet hen over hele skærelistens længde, og der opstår den 35 specielle ulempe, at ender af kilerne vil rage uden for skærecylinderen i langsgående retning. Kilerne er desuden forholdsvis kostbare komponen ter.US Patent No. 4,475,425 discloses a rotatable cutting cylinder comprising a longitudinal slot for receiving a cutting mold. The cutting strip is clamped into the slot by two thin, opposite wedges, both of which extend over the entire cutting length. The cutting strip is tightened by 30 axis parallel displacement of the wedges. With this device, it will be difficult to clamp the cutting strip in the desired position because the cutting strip will tend to displace as the wedges are displaced. By this device, it can be difficult to ensure that the tension force is uniform throughout the length of the cutting strip, and there is the particular disadvantage that ends of the wedges will extend outside the cutting cylinder in the longitudinal direction. The wedges are also relatively expensive components.

Ifølge opfindelsen tilvejebringes en roterbar skærecylinder, der DK 167312 B1 2 kan fremstilles i færre arbejdsfrin, på kortere tid og med mindre udstyr og mindre arbejde end kendte cylindre. De resulterende skærecylindre har en enkel opbygning og er billigere end de kendte skærecylindre. Dette opnås med skærecylinderen angivet i krav 1.According to the invention there is provided a rotatable cutting cylinder which can be manufactured in fewer working hours, in less time and with less equipment and less work than known cylinders. The resulting cutting cylinders have a simple construction and are cheaper than the known cutting cylinders. This is achieved with the cutting cylinder of claim 1.

5 En skærecylinder ifølge opfindelsen fremstilles ved, at man først tildanner en cylinder, eksempelvis i en drejebænk. Under dette arbejdsfri n udformes en række spor fordelt på langs ad cylinderen. Disse fordybninger forløber fortrinsvis rundt om cylinderens periferi således, at de kan udformes i drejebænken. Der kan imidlertid i stedet udføres del-10 vise fordybninger, tangentiale udskæringer eller indsnit. Herefter udformes der i cylinderen en langsgående spalte, der krydser sporene. Denne spalte er tilstrækkelig bred til, at den kan rumme en skæreliste, en mel!emlægsplade til afstivning og en monteringsstang. Monteringsstangen er en stang med et rektangulært tværsnit med sætskruer arrangeret med 15 regelmæssige indbyrdes afstande. Monteringsstangen er en lagervare, der kan tilpasses, så den passer i spalten. Sporene i cylinderen er arrangeret ved indbyrdes afstande komplementært til sætskruerne, således at et stykke værktøj kan indsættes gennem sporene til at stramme og løsne sætskruerne. Når sætskruerne er strammet, presser de skærelisten og mon- « i 20 teringsstangen mod spaltens modsatte vægge, idet de tilvejebringer friktionsmæssigt indgreb mellem skærelisten og monteringsstangen i spalten.5 A cutting cylinder according to the invention is made by first forming a cylinder, for example in a lathe. During this work-free n, a series of grooves are distributed along the cylinder. These recesses preferably extend around the circumference of the cylinder so that they can be formed in the lathe. However, partial grooves, tangential cuts, or incisions may be performed instead. Then, in the cylinder, a longitudinal slot is formed, which crosses the grooves. This slot is sufficiently wide to accommodate a cutting molding, a stiffening plate and a mounting bar. The mounting bar is a bar with a rectangular cross-section with set screws arranged at 15 regular spacings. The mounting rod is a stock item that can be adjusted to fit in the slot. The grooves in the barrel are arranged at mutually spaced intervals complementary to the set screws so that a tool can be inserted through the grooves to tighten and loosen the set screws. When the set screws are tightened, they push the cutting strip and mounting rod into the opposite walls of the slot, providing frictional engagement between the cutting strip and the mounting rod in the slot.

Den roterbare skærecylinder udformes således i to arbejdsfrin, i-det fasen til fræsning af indsnit og fasen til dannelse af gevindhullerne til sætskruerne elimineres. Dette reducerer omfanget af arbejde, der 25 er nødvendigt til at fremstille cylinderen. De resulterende roterbare skærecylindre har en enkel og stabil konstruktion.Thus, the rotatable cutting cylinder is formed in two working fractions, in that the phase for milling incisions and the phase for forming the thread holes for the set screws is eliminated. This reduces the amount of work required to produce the cylinder. The resulting rotatable cutting cylinders have a simple and stable construction.

I det følgende forklares opfindelsen nærmere under henvisning til tegningen, på hvilken 30 fig. 1 er et vertikalt billede fra siden af en første udføre!ses- form af en roterbar skærecylinder ifølge opfindelsen, hvilket billede viser en skæreliste fastgjort i cylinderen, fig. 2 er et tværsnitbillede af den roterbare skærecylinders endeparti taget langs linien 2-2 i fig. 1, 35 fig. 3 er et snitbillede af en del af den roterbare skærecylinder, taget gennem et af sporene i cylinderen, fig. 4 er et tværsnitbillede af den roterbare skærecylinder, taget gennem et af sporene langs linien 4-4 i fig. 1, DK 167312 B1 3 fig. 5 er et tværsnitbillede af en del af den roterbare skærecylinder taget langs linien 5-5 i fig. 4 visende monteringsstangen i spalten, fig. 6 er et tværsnitbillede af en del af den roterbare skærecy-5 linder gennem spalten langs linien 6-6 i fig. 5, fig. 7 er en ekspanderet delafbildning af skærelisten, mellemlægspladen og monteringsstangen, som de er arrangeret i cylinderens spalte, fig. 8 er en vertikal delafbildning fra siden af en anden udførel-10 sesform af den roterbare skærecylinder ifølge opfindelsen, fig. 9 er et snitbillede af en del af den roterbare skærecylinder gennem et af indsnittene i cylinderen, fig. 10 er et tværsnitbi Ilede af en del af den roterbare skærecylinder gennem spalten langs linien 10-10 i fig. 9, 15 fig. 11 er en delafbildning vertikalt fra siden af en tredie udfø relsesform af den roterbare skærecylinder ifølge opfindelsen, fig. 12 er et tværsn i tbi Hede af en del af den roterbare skærecylinder set gennem spalten, taget langs linien 12-12 i fig. 11, fig. 13 er en del afbildning vertikalt fra siden af en fjerde udfø-% · 20 relsesform af den roterbare skærecylinder ifølge opfindelsen, fig. 14 er et snitbillede af en del af den roterbare skærecylinder set gennem et af indsnittene i cylinderen, og fig. 15 er et snitbillede af en del af den roterbare skærecylinder set gennem spalten, taget langs linien 15-15 i fig. 14.The invention will now be explained in more detail with reference to the drawing, in which: FIG. 1 is a side elevational view of a first embodiment of a rotatable cutting cylinder according to the invention, showing a cutting strip attached to the cylinder; FIG. 2 is a cross-sectional view of the end portion of the rotatable cutting cylinder taken along line 2-2 of FIG. 1, 35 FIG. 3 is a sectional view of a portion of the rotatable cutting cylinder taken through one of the grooves in the cylinder; FIG. 4 is a cross-sectional view of the rotatable cutting cylinder taken through one of the grooves along line 4-4 of FIG. 1, DK 167312 B1 3 fig. 5 is a cross-sectional view of a portion of the rotatable cutting cylinder taken along line 5-5 of FIG. 4 showing the mounting rod in the slot; FIG. 6 is a cross-sectional view of a portion of the rotatable cutting cylinder 5 through the slot along line 6-6 of FIG. 5, FIG. 7 is an expanded sectional view of the cutting strip, insert plate and mounting rod as arranged in the barrel slot; FIG. Fig. 8 is a side elevational sectional view of another embodiment of the rotatable cutting cylinder according to the invention; 9 is a sectional view of a portion of the rotatable cutting cylinder through one of the sections of the cylinder; FIG. 10 is a cross-sectional view of a portion of the rotatable cutting cylinder through the slot along line 10-10 of FIG. 9, 15 FIG. 11 is a side elevational sectional elevation of a third embodiment of the rotatable cutting cylinder according to the invention; FIG. 12 is a cross-sectional view of a portion of the rotatable cutting cylinder seen through the slot taken along line 12-12 of FIG. 11, FIG. Figure 13 is a side elevational view of a fourth embodiment of the rotatable cutting cylinder according to the invention; 14 is a sectional view of a portion of the rotatable cutting cylinder seen through one of the sections of the cylinder; and FIG. 15 is a sectional view of a portion of the rotatable cutting cylinder seen through the slot taken along line 15-15 of FIG. 14th

25 I figurerne 1-7 vises en første udførelsesform af den roterbare skærecylinder ifølge opfindelsen, og som en helhed betegnet med henvisningstallet 20 i fig. 1. Skærecylinderen 20 har venstre og højre ender 22 og 24, således at cylinderen 20 kan monteres i en maskine. Skærecy-30 linderen 20 har en central sektion 26 med forstørret diameter. Et antal spor 28 er arrangeret med mellemrum langs skærecylinderens 20 centrale sektion 26. Sporene 28 forløber fortrinsvis helt rundt om skærecylinderens 20 periferi, således at skærecylinderen 20 og sporene 28 hensigtsmæssigt kan udformes på en drejebænk i en enkelt arbejdsoperation. Som 35 vist ved de øvrige udførelsesformer, som skal beskrives i det følgende, kan der i stedet for sporene 28 anvendes delvise spor, tangenti ale udskæringer eller indsnit. Drivruller 30 og 32 kan prespasses på skærecylinderen 20 ved modstående ender af den centrale sektion 26.Figures 1-7 show a first embodiment of the rotatable cutting cylinder according to the invention, and as a whole denoted by the reference numeral 20 in fig. 1. The cutting cylinder 20 has left and right ends 22 and 24, so that the cylinder 20 can be mounted in a machine. The cutting cylinder 30 has a central section 26 of enlarged diameter. A plurality of grooves 28 are arranged at intervals along the central section 26. Of the cutting cylinder 20, the grooves 28 preferably extend all the way around the periphery of the cutting cylinder 20, so that the cutting cylinder 20 and the grooves 28 can conveniently be formed on a lathe in a single working operation. As shown by the other embodiments to be described below, partial grooves, tangential cuts or incisions may be used instead of the grooves 28. Drive rollers 30 and 32 can be press-fit on the cutting cylinder 20 at opposite ends of the central section 26.

DK 167312 B1 4DK 167312 B1 4

En langsgående spalte 34 er udformet i skærecylinderen 20, således at den krydser sporene 28. Spalten 34 er tilstrækkelig bred til at kunne rumme en skæreliste 36, en mel!emlægsplade 38 og en monteringsstang 40. Skærelisten 36 har en affaset skærekant 42, der rager så meget ud fra 5 den centrale sektions 26 profil, at den kan overskære eksempelvis en ma-terialebane, der holdes mod den. Mellemlægspladen 38 hjælper til med at udfylde spalten 34 og afstive skærelisten 36 og hindrer den i at slå sig. Monteringsstangen 40 har et i det væsentlige rektangulært tværsnit.A longitudinal slot 34 is formed in the cutting cylinder 20 so that it intersects the grooves 28. The gap 34 is sufficiently wide to accommodate a cutting strip 36, an intermediate plate 38 and a mounting rod 40. The cutting strip 36 has a bevelled cutting edge 42 which protrudes. so much from the profile of the central section 26 that it can cut, for example, a material web held against it. The spacer plate 38 helps fill the slot 34 and stiffen the cutting strip 36 and prevents it from settling. The mounting bar 40 has a substantially rectangular cross-section.

Et antal sætskruer 44 er arrangerede med mellemrum på langs ad mon-10 teringsstangen 40. Sætskruerne 44 er fortrinsvis gevindskårne sektioner arrangeret forsænket i monteringsstangen 40, men kan stilles til at rage ud fra monteringsstangen 40. Hver skrue 44 har en sekskantet åbning, så den kan optage en sekskantet nøgle (såkaldt Unbrako-nøgle) til at stramme og løsne skruerne 44. Sporene 28 er arrangeret med mellemrum komple-15 mentært til skruerne 44. Monteringsstangen 40 er fortrinsvis fremstillet af en lagervare, der fås i handelen, og udskåret, så den passer ind i spalten 34.A plurality of set screws 44 are arranged at intervals along the mounting rod 40. The set screws 44 are preferably threaded sections arranged recessed in the mounting rod 40, but may be set to protrude from the mounting rod 40. Each screw 44 has a hexagonal opening so that it can accommodate a hexagonal wrench (so-called Unbrako wrench) for tightening and loosening the screws 44. The grooves 28 are arranged at intervals complementary to the screws 44. The mounting bar 40 is preferably made of commercially available stock and cut out, to fit into the slot 34.

Skærelisten 36, mellemlægspladen 38 og monteringsstangen 40 er arrangeret i spalten 34 med sætskruerne 44 i monteringsstangen 40 ud for 20 sporene 28 i den centrale sektion 26. Sætskruerne 44 er strammet således, at de presser skærelisten 36 og mellemlægspladen 38 fremad og monteringsstangen 40 bagud i spalten 34 mod spaltens 34 modstående vægge for at danne friktionsmæssigt indgreb mellem skærelisten 36, mellemlægs-pladen 38 og monteringsstangen 40 i spalten 34.The cutting strip 36, the intermediate plate 38 and the mounting rod 40 are arranged in the slot 34 with the set screws 44 in the mounting rod 40 next to the grooves 28 in the central section 26. The set screws 44 are tightened so that they push the cutting strip 36 and the intermediate plate 38 forward and the mounting rod 40 rearwardly. the slit 34 against the opposite walls of the slit 34 to form frictional engagement between the cutting strip 36, the insert plate 38 and the mounting rod 40 in the slit 34.

25 Skærelisten 36 kan fjernes hurtigt og let, for eksempel når den skal udskiftes, ved at løsne sætskruerne 44, der ligger frit i sporene 28.The cutting strip 36 can be removed quickly and easily, for example when it is to be replaced, by loosening the set screws 44 which lie freely in the grooves 28.

Den roterbare skærecylinder 20 kan således fremstilles i en hurtig, enkel og billig totrins-arbejdsproces, hvor cylinderen med sporene 30 formes og den langsgående spalte i cylinderen udformes til at optage skærelisten eller vice versa. Den fremstillede cylinder har en enkel konstruktion og er stabil og let at anvende.Thus, the rotatable cutting cylinder 20 can be manufactured in a fast, simple and inexpensive two-stage working process, in which the cylinder with the grooves 30 is formed and the longitudinal slot in the cylinder is designed to receive the cutting mold or vice versa. The manufactured cylinder has a simple construction and is stable and easy to use.

I figurerne 8-10 vises en anden udførelsesform af den roterbare skærecylinder opbygget ifølge opfindelsen og som helhed betegnet med 35 henvisningstallet 100 i fig. 8. Skærecylinderen 100 har samme opbygning som skærecylinderen 20, og identiske dele har de samme henvisningstal bortset fra, at skærecylinderen 100 i stedet for et antal perifere spor 28 har et antal tangentiale udskæringer 102. De tangentiale udskæringer DK 167312 B1 5 102 forløber på tværs og har forbindelse med spalten 34 i skærecylinderen 100. De tangenti ale udskæringer 102 kan udformes før eller efter, at spalten 34 er udformet. De tangenti ale udskæringer 102 er enkle at danne, og de kendte vanskelige og tidskrævende processer til udformning af 5 et indsnit, der har en flade på sin basis parallel med spalten, og udformningen af et gevindskåret hul, der går gennem denne flade, undgås således.Figures 8-10 show another embodiment of the rotatable cutting cylinder constructed according to the invention and as a whole denoted by the reference numeral 100 in FIG. 8. The cutting cylinder 100 has the same structure as the cutting cylinder 20, and identical parts have the same reference numerals except that the cutting cylinder 100 has a plurality of tangential cuts 10 instead of a number of peripheral grooves 282. The tangential cuts DK 167312 B1 5 102 extend transversely. and communicates with the slot 34 in the cutting cylinder 100. The tangential cuts 102 may be formed before or after the slot 34 is formed. The tangential cut-outs 102 are easy to form, and the known difficult and time-consuming processes for forming an incision having a surface at its base parallel to the slit, thus avoiding the formation of a threaded hole passing through that surface .

Ligesom den ovenfor beskrevne første udførelsesform er skærelisten 36, mel!emlægspladen 38 og monteringsstangen 40 arrangeret i spalten 34.Like the first embodiment described above, the cutting strip 36, the insert plate 38 and the mounting rod 40 are arranged in the slot 34.

10 Ligesom sporene 28 er de tangenti ale udskæringer 102 arrangeret med mellemrum komplementært til skruerne 44 i monteringsstangen 40. Sætskruerne 44 på monteringsstangen 40 er arrangeret ud for de tangenti ale udskæringer 102 og er strammet til friktionsmæssigt at gå i indgreb med skærelisten 36, mellemlægspladen 38 og monteringsstangen 40 i spalten 34.10 Like the grooves 28, the tangential cuts 102 are arranged at intervals complementary to the screws 44 of the mounting rod 40. The set screws 44 of the mounting rod 40 are arranged adjacent to the tangential cuts 102 and are tightened to engage frictionally with the cutting strip 36, the insert plate 38. and mounting rod 40 in slot 34.

15 I figurerne 11 og 12 er der vist en tredie udførelsesform af den roterbare skærecylinder ifølge opfindelsen, betegnet som en helhed med henvisningstallet 200 i fig. 11. Skærecylinderen 200 har samme opbygning som skærecylinderen 20, og identiske dele har samme henvisningstal bortset fra, at skærecylinderen 200 i stedet for et antal perifere spor 20 28 har et antal indsnit 202. Indsnittene 202 er åbne imod og har forbindelse med spalten 34 i skærecylinderen 200. Indsnittene 202 kan udformes før eller efter udformningen af spalten 34. Indsnittene 202 har vertikale sidevægge og en flad bund. Indsnittene 202 er enkle at fremstille, og de kendte vanskelige og tidskrævende processer til udformning af et ind-25 snit, der har en flade på sin basis, der er parallel med spalten, og til udformning af et gevindskåret hul, der går gennem denne flade, undgås således.Figures 11 and 12 show a third embodiment of the rotatable cutting cylinder according to the invention, denoted as a whole by the reference numeral 200 in fig. 11. The cutting cylinder 200 has the same structure as the cutting cylinder 20, and identical parts have the same reference numerals except that the cutting cylinder 200, instead of a number of peripheral grooves 20 28, has a number of notches 202. The incisions 202 are open against and connected with the slot 34 in the cutting cylinder 200. The incisions 202 may be formed before or after the design of the slot 34. The incisions 202 have vertical side walls and a flat bottom. The incisions 202 are easy to manufacture, and the known difficult and time-consuming processes for forming an incision having a surface at its base parallel to the slot and for forming a threaded hole passing through that surface is thus avoided.

Ligesom i den ovenfor beskrevne første udførelsesform er skærelisten 36, mellemlægspladen 38 og monteringsstangen 40 anbragt i spalten 30 34. Ligesom sporene 28 er indsnittene 202 arrangeret med mellemrum komplementært til skruerne 44 på monteringsstangen 40. Sætskruerne 44 på monteringsstangen 40 er arrangeret ud for indsnittene 202 og er strammet for at danne friktionsmæssigt indgreb mellem skærelisten 36, mellemlægspladen 38 og monteringsstangen 40 i spalten 34.As in the first embodiment described above, the cutting strip 36, the insert plate 38 and the mounting rod 40 are arranged in the slot 30 34. Like the grooves 28, the notches 202 are arranged at intervals complementary to the screws 44 on the mounting rod 40. The set screws 44 on the mounting rod 40 are arranged outside the notches 202. and is tightened to form frictional engagement between the cutting strip 36, the insert plate 38 and the mounting rod 40 in the slot 34.

35 I figurerne 13-15 vises en fjerde udførelsesform af en roterbar skærecylinder ifølge opfindelsen, som helhed betegnet med henvisningstallet 300 i fig. 13. Skærecylinderen 300 har samme opbygning som skærecylinderen 20, og identiske dele har samme henvisningstal bortset fra,Figures 13-15 show a fourth embodiment of a rotatable cutting cylinder according to the invention, as a whole denoted by the reference numeral 300 in FIG. 13. The cutting cylinder 300 has the same structure as the cutting cylinder 20, and identical parts have the same reference numerals except

Claims

A rotatable cutting cylinder comprising a substantially cylindrical central section (26), said section having a plurality of grooves (28,102,202,302) spaced longitudinally and at least one longitudinal slot (34) having opposite side faces associated with the grooves, at least a portion of each of the spaced longitudinal grooves substantially tangent to the central section, a cutting groove (36) in the slot, which cutting groove having a cutting edge (42) projecting from the slot, and a mounting rod (40) in the slot, the mounting rod being up to the cutting strip, the mounting rod having means for pressing the cutting relay up against one of the lateral surfaces of the slot, longitudinally arranged grooves open access to means adapted to press against the mounting rod in such a way that these means can be operated to press the cutting strip against it. one of the side faces of the slot and the mounting rod away from the cutting edge and towards the opposite side face of the gap, thereby maintaining the cutting edge in the gap.

2. A rotatable cutting cylinder according to claim 1, characterized in that the longitudinally arranged grooves (28) extend around the periphery of the central section.

3. A rotatable cutting cylinder according to claim 1, characterized in that the longitudinally arranged grooves comprise tangential 5 cuts (102) in the cylinder which intersect and connect to the slot.

4. A rotatable cutting cylinder according to claim 1, characterized in that the longitudinally arranged grooves comprise notches (202,302) of the 10th cylinder, which notches are open towards and are connected to the slot.

A rotatable cutting cylinder according to claim 1, characterized in that the means for pressing the cutting strip (36) and the mounting rod (40) against the opposite side faces of the slot comprise a number of 15 set screws (44) in the mounting rod, each set screws arranged for a groove in the cylinder, which set screws can be set to press the cutting strip and the mounting bar against the opposite walls of the slot to hold the cutting strip and the mounting rod in the slot. 20

The rotatable cutting cylinder according to claim 1, characterized in that it further comprises an insert plate (38) arranged in the gap between the cutting strip (36) and the mounting rod (40). 25

A rotatable cutting cylinder according to claim 5, characterized in that each set screw (44) has a hexagonal recess (46) for engaging a fixed key for adjusting the set screws.