EP0432415B1 - Druckzylinder mit dämpfenden Eigenschaften - Google Patents
Druckzylinder mit dämpfenden Eigenschaften Download PDFInfo
- Publication number
- EP0432415B1 EP0432415B1 EP90120033A EP90120033A EP0432415B1 EP 0432415 B1 EP0432415 B1 EP 0432415B1 EP 90120033 A EP90120033 A EP 90120033A EP 90120033 A EP90120033 A EP 90120033A EP 0432415 B1 EP0432415 B1 EP 0432415B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- printing
- circumference
- numbering
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/08—Cylinders
- B41F13/085—Cylinders with means for preventing or damping vibrations or shocks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
- B41L35/00—Cylinders for apparatus or machines for manifolding, duplicating, or printing for office or other commercial purposes
- B41L35/10—Impression cylinders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N7/00—Shells for rollers of printing machines
- B41N7/06—Shells for rollers of printing machines for inking rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/02—Top layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/04—Intermediate layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/14—Location or type of the layers in shells for rollers of printing machines characterised by macromolecular organic compounds
Definitions
- the invention relates to a printing cylinder of an offset rotary printing press, preferably a small offset printing press.
- the printing cylinders are usually chrome-plated.
- the printing cylinders are provided with a refined cylinder jacket against build-up of ink.
- the pressure cylinders are provided with an elevator plate which is clamped or screwed on.
- This elevator sheet serves to protect the chrome surface of the impression cylinder.
- the disadvantage is that the numbers on the numbering units wear out very heavily on thin substrates due to the lack of elasticity of the elevator sheet.
- an already delivered small offset printing machine can be retrofitted with a numbering device, an additional inking unit for coloring the numbering units or plate holder as well as seat rings for receiving the same are installed.
- protective measures must be taken for the chrome-plated or nickel-plated pressure cylinder.
- the subsequent installation of an elevator sheet is not possible, since the thickness of the sheet to be drawn up and the associated increase in diameter of the printing cylinder increase the paper sheet speed in an impermissible manner.
- the installation of an elevator sheet also requires additional clamping devices on the pressure cylinder.
- the problem underlying the invention arises to improve the printing cylinder of a small offset printing press in such a way that both normal print jobs without a cylinder elevator and print jobs with numbering can be carried out in which the impact of contact between the digits and the sheet is dampened.
- the warp-free carrier material facilitates wrinkle-free assembly in the printing press. This prevents the occurrence of irregularities and unevenness on the printing cylinder. This creates a flat surface for the outer layer resting on it.
- the high wear resistance of the outer layer creates an embossing avoided on the circumference of the cylinder at the stop of the numbering unit or the plate carrier.
- the cylinder lift is not plastically deformed. This also excludes as a further advantage that the adhesive located under the stop point is pushed away to the side and thus irregularities occur under the cylinder lift, which can negatively influence the printing result.
- the total layer thickness of the cylinder lift is up to 0.2 mm.
- the inner layer of the cylinder elevator is made of polyester or polyamide, while the outer layer of the cylinder is made of polyurethane.
- the polyester backing material has great rigidity and thus offers a stable base for the polyurethane layer.
- the polyurethane layer has a high damping capacity, which increases smoothness and reduces the bearing load due to the numbering shocks.
- the cylinder lift with its inner layer is by means of a removable adhesive can be attached to the circumference of the printing cylinder.
- Another advantage is that the cylinder cover is glued to the printing cylinder so that no relative movements between the printing cylinder and the cylinder lift can occur. This eliminates frictional wear and does not affect the life of the printing cylinder.
- the cylinder lift can be applied to the circumference of the printing cylinder with numbering work at the beginning of printing jobs and can be removed from the circumference of the printing cylinder after the printing job has ended.
- the cylinder lift has a high resistance to the chemicals used in offset printing.
- the impression cylinder 1 shows a cross section through the printing unit of a small offset printing machine.
- the impression cylinder 1 is provided with a thin cylinder elevator 2.
- the thin cylinder elevator 2 consists of two layers.
- the inner layer 3 is a rigid, distortion-free carrier material, e.g. B. polyester. It can also consist of polyamide or similar plastics.
- the outer layer 4 is a wear-resistant material, e.g. As polyurethane or similar plastics, with damping properties and resistance to offset chemicals.
- the cylinder lift 2 combined from the inner layer 3 and the outer layer 4, has a maximum thickness of up to 0.2 mm. With the help of a very thin layer of an adhesive 5, the cylinder elevator 2 is fixed wrinkle-free on the printing cylinder 1 of the small offset printing machine. The crease-free mounting of the cylinder lift 2 is made possible by the rigidity of the inner layer 3 of the cylinder lift 2.
- the small thickness of the cylinder lift 2 precludes an excessive increase in the cylinder peripheral speed and the resulting pressure elongation.
- the small thickness of the cylinder lift 2 enables retrofitting in a printing press. An excessive increase in the pressure between the cylinders of the printing unit is omitted, so that the ink splitting between the blanket cylinder 7 and the printing cylinder 1 is not impaired.
- the layer of adhesive 5 lying between cylinder elevator 2 and impression cylinder 1 further improves the damping properties of cylinder elevator 2, a two-layer laminate.
- the numbering digits which are colored using an additional inking unit, hit the sheet-guiding printing cylinder 1.
- Damage to the surface of the printing cylinder 1 by the numbers of the numbering device 6 is prevented by the cylinder elevator 2 in the case of thin printing material thicknesses. The impact that occurs when the digits and arcs come into contact is dampened.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3938131A DE3938131A1 (de) | 1989-11-16 | 1989-11-16 | Druckzylinder mit daempfenden eigenschaften |
DE3938131 | 1989-11-16 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0432415A2 EP0432415A2 (de) | 1991-06-19 |
EP0432415A3 EP0432415A3 (en) | 1992-05-27 |
EP0432415B1 true EP0432415B1 (de) | 1995-03-22 |
Family
ID=6393667
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90120033A Expired - Lifetime EP0432415B1 (de) | 1989-11-16 | 1990-10-19 | Druckzylinder mit dämpfenden Eigenschaften |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0432415B1 (ja) |
JP (1) | JPH0780288B2 (ja) |
DE (2) | DE3938131A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008132721A (ja) * | 2006-11-29 | 2008-06-12 | Nitto Denko Corp | 印刷機用のクッションシート、印刷機、及び印刷方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1470098A (fr) * | 1965-02-25 | 1967-02-17 | Kuesters Eduard Maschf | Cylindre de pression pour machine à imprimer rotative et machine pourvue dudit cylindre |
NL7014510A (en) * | 1969-10-29 | 1971-05-04 | Polyurethane coated pressure roller | |
DE8401480U1 (de) * | 1984-01-19 | 1984-04-05 | Birkan Drucktuchtechnik GmbH, 8081 Eching | Plattenzylinder, insbesondere offset-plattenzylinder |
-
1989
- 1989-11-16 DE DE3938131A patent/DE3938131A1/de active Granted
-
1990
- 1990-10-19 EP EP90120033A patent/EP0432415B1/de not_active Expired - Lifetime
- 1990-10-19 DE DE59008762T patent/DE59008762D1/de not_active Expired - Fee Related
- 1990-11-13 JP JP2304200A patent/JPH0780288B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0432415A3 (en) | 1992-05-27 |
DE59008762D1 (de) | 1995-04-27 |
EP0432415A2 (de) | 1991-06-19 |
DE3938131C2 (ja) | 1993-05-13 |
DE3938131A1 (de) | 1991-05-23 |
JPH03169553A (ja) | 1991-07-23 |
JPH0780288B2 (ja) | 1995-08-30 |
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