DK143592B - PRESSURE CYLINDER - Google Patents
PRESSURE CYLINDER Download PDFInfo
- Publication number
- DK143592B DK143592B DK474773A DK474773A DK143592B DK 143592 B DK143592 B DK 143592B DK 474773 A DK474773 A DK 474773A DK 474773 A DK474773 A DK 474773A DK 143592 B DK143592 B DK 143592B
- Authority
- DK
- Denmark
- Prior art keywords
- sheath
- cliché
- pressure cylinder
- tube
- layer
- Prior art date
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- Printing Plates And Materials Therefor (AREA)
Description
143592143592
Patent nr. 127.277 angår en trykcylinder til trykkemaskiner, især flexotrykkemaskiner og indirekte dybtryksmaskiner, og som har en klichébærende kappe, der er monteret på en cirkulær aksel, og det ejendommelige ifølge hovedpatentet 5 er, at kappen på i og for sig kendt måde ved hver ende er forsynet med en justeringsmekanisme, som består af et ulige antal indstillelige fastgørelsesorganer, der er i indgreb med akselen, og at kappen er monteret med et sådant spillerum på akselen, at akselen under rotation ikke kan berøre 10 den indvendige flade af kappen.Patent No. 127,277 relates to a printing cylinder for printing machines, in particular flexo printing machines and indirect gravure printing machines, having a cliché bearing sheath mounted on a circular shaft, and the characteristic of the main patent 5 is that the sheath is known per se in each case. end is provided with an adjustment mechanism which consists of an odd number of adjustable fasteners which engage the shaft and that the sheath is mounted with such clearance on the shaft that the shaft during rotation cannot touch the inner surface of the sheath.
Trykcylinderen kan ved en udførelsesforra være ejendommelig ved, at kappen består af et indre cylinderrør af metal og uden på dette et ydre cylinderrør af plast. Denne plast kan ifølge krav 6 i hovedpatentet udgøres af polyurethanskum 15 eller lignende skummateriale.In one embodiment, the pressure cylinder may be characterized in that the casing consists of a metal inner tube and, on the outside, an outer plastic tube. This plastic can according to claim 6 in the main patent be constituted by polyurethane foam 15 or similar foam material.
Der kendes trykcylindre, uden på hvis kappe er monteret en gummikliché. Anvendelse af en sådan gummikliché har den ulempe, at dens fremstilling er både kostbar og langsommelig, da man først må fremstille en metalkliché af f.eks. zink el-20 ler magnesium og derefter ud fra denne metalkliché må støbe en matrice, og endelig skal der ved hjælp af denne matrice støbes en gummikliché. Denne gummikliché må i de fleste tilfælde slibes på bagsiden, for at man kan opnå en tilstrækkelig nøjagtig tykkelse.Pressure cylinders are known, on the outside of which a rubber cliche is mounted. The use of such a rubber cliche has the disadvantage that its manufacture is both expensive and slow, since one must first produce a metal cliche of e.g. zinc or 20 clay magnesium and then from this metal cliché must cast a die, and finally with this die a rubber cliché must be cast. In most cases, this rubber cliché has to be sanded on the back to achieve a sufficiently accurate thickness.
25 Der kendes endvidere trykcylindre med et metallisk overfladelag, ligesom det er kendt at gravere eller ætse forlaget i metal.25 Furthermore, pressure cylinders with a metallic surface layer are known, and it is known to engrave or etch the publisher in metal.
Trykcylinderen ifølge den foreliggende opfindelse er ifølge krav 1 ejendommelig ved, at det ydre cylinderrørs ydre over-30 flade er forsynet med et lag af metal, såsom kobber, zink, magnesium eller aluminium, hvori trykbilledet eller -teksten kan graveres eller ætses efter lagets anbringelse på det ydre cylinderrør. Herved opnås, at man i selve metallaget 143592 2 efter dettes anbringelse på det ydre cylinderrør kan gravere eller ætse det billede eller den tekst, som skal trykkes, således at man sparer anvendelse af en særskilt gummikliché, samtidig med at der opnås den til udførelsesformen 5 ifølge krav 6 i hovedpatentet hørende fordel, nemlig en stærk dæmpning af uønskede vibrationer mellem kliché og materialebane samt en formindskelse af kappens udbøjning. Metallaget har yderligere en afstivende virkning på det ydre cylinderrør.According to claim 1, the printing cylinder according to the present invention is characterized in that the outer surface of the outer cylinder tube is provided with a layer of metal, such as copper, zinc, magnesium or aluminum, in which the printing image or text can be engraved or etched after the application of the layer. on the outer cylinder tube. Hereby it is achieved that, in the metal layer itself 143592 2, after it is placed on the outer cylinder tube, it is possible to engrave or etch the image or text to be printed, thus saving the use of a separate rubber cliche, while obtaining it for the embodiment 5 according to claim 6 of the main patent, namely a strong attenuation of unwanted vibrations between the cliché and the material web and a reduction of the deflection of the jacket. The metal layer further has a stiffening effect on the outer cylinder tube.
10 Endvidere er ifølge krav 2 trykcylinderen ifølge opfindelsen ejendommelig ved, at det ydre cylinderrørs ydre overflade er forsynet med et lag af lysfølsom polymer, hvis molekylstruktur i forvejen er blevet gjort påvirkelig over for ultraviolet lys. Herved er det muligt at fremstille en 15 trykcylinder til flexotryk på en billigere og bedre måde end tidligere, da klichéen udgøres af selve det lysfølsomme materiale, således at man kan undgå anvendelsen af en særskilt gummikliché. Den af lysfølsom polymer fremstillede kliché har yderligere i forhold til gummiklichéer den fordel, at 20 den har stor slidstyrke, således at klichéens holdbarhed forøges.Furthermore, according to claim 2, the pressure cylinder according to the invention is characterized in that the outer surface of the outer cylinder tube is provided with a layer of photosensitive polymer, whose molecular structure has already been made susceptible to ultraviolet light. Hereby it is possible to make a 15 pressure cylinder for flexo printing in a cheaper and better way than before, since the cliché is made up of the photosensitive material itself, so as to avoid the use of a separate rubber cliché. The cliché made from photosensitive polymer further has the advantage of having a high abrasion resistance with respect to rubber cliches, thus increasing the durability of the cliché.
Opfindelsen forklares nedenfor under henvisning til tegningen, hvor fig. 1 viser en trykcylinder anbragt på en aksel set fra 25 siden, fig. 2 i større målforhold et delvis lodret snit gennem den venstre ende af trykcylinderen i fig. 1 og fig. 3 et lodret snit efter linien III-III i fig. 2.The invention is explained below with reference to the drawing, in which fig. 1 shows a pressure cylinder mounted on a shaft as seen from 25; FIG. 2 shows, in larger dimensions, a partially vertical section through the left end of the pressure cylinder of FIG. 1 and FIG. 3 is a vertical section along line III-III of FIG. 2nd
3 U35923 U3592
Den i fig. 1 viste trykcylinder har en kappe 2, der er monteret på en cirkulær aksel 5 (fig. 2). Kappen 2 er ved hver ende forsynet med en justeringsmekanisme, som består af et ulige antal indstillelige fastgørelsesorganer 8, 9 og 10 5 (fig. 3), der er i indgreb med akselen 5. Kappen 2 er mon teret med et sådant spillerum på akselen 5, at denne under rotation ikke kan berøre den indvendige flade af kappen 2.The FIG. 1, a pressure cylinder 2 has a casing 2 mounted on a circular shaft 5 (Fig. 2). The sheath 2 is provided at each end with an adjustment mechanism consisting of an odd number of adjustable fasteners 8, 9 and 10 (Fig. 3) which engage the shaft 5. The sheath 2 is fitted with such clearance on the shaft. 5, that during rotation it cannot touch the inner surface of the sheath 2.
Som vist i fig. 2, består kappen 2 af et indre cylinderrør 3 og uden på dette et ydre cylinderrør 4. Det indre cylinder-10 rør 3 kan være fremstillet af stål, aluminium eller et andet metal. Det ydre cylinderrør 4 kan være fremstillet af plast, fortrinsvis polyurethanskum eller lignende skummateriale.As shown in FIG. 2, the casing 2 consists of an inner cylinder tube 3 and on the outside thereof an outer cylinder tube 4. The inner cylinder-10 tube 3 may be made of steel, aluminum or another metal. The outer cylinder tube 4 may be made of plastic, preferably polyurethane foam or similar foam material.
I det tilfælde, hvor kappen 2's ydre cylinderrør 4 er frem-15 stillet af polyurethanskum, kan det ydre cylinderrør 4's ydre overflade være forsynet med et lag 15 (fig. 2 og 3) af metal, såsom kobber, zink, magnesium eller aluminium.In the case where the outer cylinder tube 4 of the sheath 2 is made of polyurethane foam, the outer surface of the outer cylinder tube 4 may be provided with a layer 15 (Figures 2 and 3) of metal such as copper, zinc, magnesium or aluminum.
Hvis f.eks. det ydre cylinderrør 4 af polyurethanskum er belagt med et kobberlag 15, vil det være muligt at fremstil-20 le en trykcylinder efter den normale fremstillingsproces, idet det billede eller den tekst, som skal trykkes, enten kan graveres eller ætses i selve kobberlaget 15 efter dettes anbringelse på det ydre cylinderrør 4. En således fremstillet kappe 2 egner sig ikke blot som flexotrykkecylinder, men 25 også som dybtrykscylinder. Ved at man som nævnt kan gravere eller ætse direkte i metallaget 15, sparer man helt anvendelsen af den kendte gummikliché. Metallaget 15 har yderligere en afstivende virkning på kappen 2.For example, the outer cylinder tube 4 of polyurethane foam is coated with a copper layer 15, it will be possible to produce a printing cylinder according to the normal manufacturing process, the image or text to be printed either engraved or etched in the copper layer 15 after its placement on the outer barrel tube 4. A sheath 2 thus produced is suitable not only as a flexo printing cylinder but also as a gravure printing cylinder. As mentioned, engraving or etching directly in the metal layer 15 saves the use of the known rubber cliché completely. The metal layer 15 further has a stiffening effect on the sheath 2.
I det tilfælde, hvor kappen 2's ydre cylinderrør 4 er frem-50 stillet af polyurethanskum, kan det ydre cylinderrør 4's ydre overflade i stedet for et metallag 15 være forsynet med et lag af lysfølsom polymer,hvis molekylstruktur i forvejen er blevet gjort påvirkelig over for ultraviolet lys. Herved er det muligt at fremstille en trykcylinderIn the case where the outer cylinder tube 4 of the sheath 2 is made of polyurethane foam, the outer surface of the outer cylinder tube 4 may instead of a metal layer 15 be provided with a layer of photosensitive polymer whose molecular structure has already been made susceptible to ultraviolet light. This makes it possible to make a pressure cylinder
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT21190/73A IT981123B (en) | 1972-03-06 | 1973-03-05 | PRESSURE CYLINDER |
GB1061873 | 1973-03-05 | ||
GB1061873A GB1414227A (en) | 1972-03-06 | 1973-03-05 | Printing cylinder |
IT2119073 | 1973-03-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
DK143592B true DK143592B (en) | 1981-09-14 |
DK143592C DK143592C (en) | 1982-02-15 |
Family
ID=26247644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK474773A DK143592C (en) | 1973-03-05 | 1973-08-29 | PRESSURE CYLINDER |
Country Status (1)
Country | Link |
---|---|
DK (1) | DK143592C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987003843A1 (en) * | 1985-12-20 | 1987-07-02 | Jens Erik Sattrup | A method of producing a surface sleeve for a plate cylinder for printing purposes |
-
1973
- 1973-08-29 DK DK474773A patent/DK143592C/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987003843A1 (en) * | 1985-12-20 | 1987-07-02 | Jens Erik Sattrup | A method of producing a surface sleeve for a plate cylinder for printing purposes |
Also Published As
Publication number | Publication date |
---|---|
DK143592C (en) | 1982-02-15 |
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