EP1375145A2 - Kompensationshülse für den Flexodruck - Google Patents
Kompensationshülse für den Flexodruck Download PDFInfo
- Publication number
- EP1375145A2 EP1375145A2 EP03356096A EP03356096A EP1375145A2 EP 1375145 A2 EP1375145 A2 EP 1375145A2 EP 03356096 A EP03356096 A EP 03356096A EP 03356096 A EP03356096 A EP 03356096A EP 1375145 A2 EP1375145 A2 EP 1375145A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- compensating sleeve
- elastomeric material
- face
- shore
- carrier
- 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.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F27/00—Devices for attaching printing elements or formes to supports
- B41F27/14—Devices for attaching printing elements or formes to supports for attaching printing formes to intermediate supports, e.g. adapter members
Definitions
- a compensating sleeve is suitable specifically to compensate for the dimensional difference between a carrier rotational drive and a printer shape with the outer face forms a flexographic plate.
- a compensating sleeve must be distinguished, on the one hand, a flexographic printing sleeve, generally consisting of a metal or composite base, coated with a photopolymer or rubber, and on the other hand a transfer sleeve, or blanket, consisting usually a metal base coated with rubber.
- a print compensating sleeve by flexography is a component of relatively large size and weight, having various mechanical characteristics relatively antagonistic, with particularly internal and external dimensions accurate.
- the compensating sleeve On one side, that is to say on the side of its cylindrical inner face, the compensating sleeve is centrifugally deformed or expanded but limited, over a short period, under the effect of a gas cushion under pressure (for example compressed air between 5 and 8 bars of pressure), and this to be removed from the wearer, then set up on or extracted by sliding of said carrier, as the case may be.
- a gas cushion under pressure for example compressed air between 5 and 8 bars of pressure
- the sleeve should have sufficient centripetal elasticity to return to the tight position against the wearer's cylindrical outer surface, once the stress centrifugal stops.
- the sleeve compensator In the tight position against the wearer, the sleeve compensator must maintain, almost permanently, stability dimensional, in particular as regards its internal section, so as to avoid, during printing, any relative sliding in rotation between the carrier and the compensating sleeve. And these characteristics of radial elasticity and dimensional stability must remain as long as possible, notwithstanding a significant number of assemblies / disassemblies compared to the carrier.
- the compensating sleeve On the other side, i.e. on the side of its outer face cylindrical, the compensating sleeve must remain relatively hard, of a part, given its rotational support against the medium to be printed (paper, cardboard, plastic, etc.) during the flexographic printing process, and on the other hand to preserve at its nominal value the outside diameter of the compensating sleeve, for controlled flexographic printing.
- This hardness of the outer face also allows its polishing, for perfect adhesion of the printer form.
- the compensating sleeve presents an almost perfect volume homogeneity, to avoid any "imbalance" during its rotation at high speed, vibration generator degrading the quality of flexographic printing.
- a sleeve composite can only be a composite part.
- the material of the first tube in this case a fabric glass fibers impregnated with a resin, does not allow to reconcile, in the duration, centrifugal radial elasticity and centripetal tightening stability.
- the aforementioned material gradually releases its initial constraints, originally allowing it to ensure a good tightening; a relaxation centrifugal therefore occurs after a certain number of cycles assembly / disassembly / printing.
- This material and more particularly the resin which permeates it, have a glass transition temperature, that is to say a transition from the glassy state in the rubbery state, between 60 and 150 ° C. Therefore, during the process of manufacture of the continuous printer form, in the form of a sleeve, in photopolymer material previously fixed on the compensating sleeve, the latter undergoes, during the polymerization of the photopolymer constituting the printer form, a relatively large temperature rise, by example between 110 ° C and 140 ° C for 30 min, exceeding this glass transition temperature, above which stability dimension of the material of the first tube is no longer guaranteed. Therefore, in returning to room temperature, this material no longer has its original dimensions, which in particular compromises its clamping capacity.
- the object of the present invention is to remedy the drawbacks previously identified.
- the subject of the invention is, in the context of a printing process by flexography, a construction compensating cylinder particularly simple, presenting over time, and dimensional stability of its internal and external sections, and a centripetal radial elasticity at the level of its cylindrical inner face, remaining compatible with this stability dimensional.
- nickel-based is meant that the nickel constituting the internal base, in majority quantity, can be alloyed, in minority quantity, with one or more metals, or even other non-metallic elements, therefore that all nickel and / or other metals can be deposited on any suitable support by electrolysis or electroplating.
- the relatively hard outer layer of the compensating sleeve is not found subject to no significant deformation, thanks to the interlayer relatively soft, notwithstanding the centrifugal radial deformations, elastic, internal base.
- the relatively hard outer layer is found to exert a limited pressure on the internal base, through the layer relatively soft intermediate, during the phases of dilation of the base internal, helping the latter to keep a constant tightening on the carrier.
- the invention only with the intermediate base to base of nickel, and moreover under a small thickness, it is possible to reconcile, at the level of the inner face of the compensating sleeve, and radial elasticity centrifugal and centripetal dimensional stability. This results in particular from the fact that the nickel obtained by electroplating, at low thickness, has a three-dimensional, face-centered cubic crystal structure with homogeneity, cohesion and elasticity.
- the surface finish, perfectly smooth inside the base metallic nickel significantly promotes cushion spread air required for mounting / dismounting the base on the carrier. This allows therefore to limit this air stream in thickness, which correspondingly reduces the expansion of the base.
- the inner diameter may be an exact reflection of the geometry of the outer surface cylindrical of the carrier.
- the interior surface finish of the base and the thickness of the deposit are therefore almost perfect, which avoids any subsequent rectification.
- nickel is a perfectly recyclable material, which allows to recover the manufacturing scraps of the base.
- FIG. 1 represents an exploded view, to scale enlarged, of a carrier / compensating sleeve / printer assembly, according to the present invention.
- the compensating sleeve (3) is made up only by the internal tubular base (5), the external layer (6) of the material hard elastomer, and the intermediate layer (7) of the soft elastomer material, bonded to each other.
- the difference in hardness between the material hard elastomer and the soft elastomer material is at least 30 Shore D.
Landscapes
- Printing Plates And Materials Therefor (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0207797 | 2002-06-24 | ||
| FR0207797A FR2841176B1 (fr) | 2002-06-24 | 2002-06-24 | Manchon compensateur pour l'impression flexographique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1375145A2 true EP1375145A2 (de) | 2004-01-02 |
| EP1375145A3 EP1375145A3 (de) | 2004-06-09 |
Family
ID=29717088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03356096A Withdrawn EP1375145A3 (de) | 2002-06-24 | 2003-06-23 | Kompensationshülse für den Flexodruck |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1375145A3 (de) |
| DE (1) | DE03356096T1 (de) |
| ES (1) | ES2217997T1 (de) |
| FR (1) | FR2841176B1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005092618A1 (en) * | 2004-03-29 | 2005-10-06 | Goss International Montataire Sa | Packing sleeve for a printing unit cylinder of an offset printing press |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3633155A1 (de) * | 1986-09-30 | 1988-04-07 | Saueressig & Co | Druckzylinder, insbesondere fuer das flexodruckverfahren |
| WO1998029259A1 (de) * | 1997-01-04 | 1998-07-09 | Rotec Hülsensysteme Gmbh | Metallische druckhülse mit harter kunststoffschicht |
| EP1164011A3 (de) * | 2000-06-16 | 2005-09-14 | ROSSINI S.p.A. | Mehrschichtige Druckhülse |
-
2002
- 2002-06-24 FR FR0207797A patent/FR2841176B1/fr not_active Expired - Fee Related
-
2003
- 2003-06-23 DE DE2003356096 patent/DE03356096T1/de active Pending
- 2003-06-23 EP EP03356096A patent/EP1375145A3/de not_active Withdrawn
- 2003-06-23 ES ES03356096T patent/ES2217997T1/es active Pending
Non-Patent Citations (1)
| Title |
|---|
| None * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005092618A1 (en) * | 2004-03-29 | 2005-10-06 | Goss International Montataire Sa | Packing sleeve for a printing unit cylinder of an offset printing press |
| US7861652B2 (en) | 2004-03-29 | 2011-01-04 | Goss International Montataire Sa | Packing sleeve for a printing unit cylinder of an offset printing press |
Also Published As
| Publication number | Publication date |
|---|---|
| DE03356096T1 (de) | 2004-10-21 |
| ES2217997T1 (es) | 2004-11-16 |
| FR2841176A1 (fr) | 2003-12-26 |
| FR2841176B1 (fr) | 2005-08-26 |
| EP1375145A3 (de) | 2004-06-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20030626 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
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| AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
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| PUAL | Search report despatched |
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| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
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| AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
| RIC1 | Information provided on ipc code assigned before grant |
Ipc: 7B 41C 1/18 B Ipc: 7B 41F 13/10 A |
|
| GBC | Gb: translation of claims filed (gb section 78(7)/1977) | ||
| TCAT | At: translation of patent claims filed | ||
| TCNL | Nl: translation of patent claims filed | ||
| DET | De: translation of patent claims | ||
| AKX | Designation fees paid |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
| 17Q | First examination report despatched |
Effective date: 20061110 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20070102 |