EP2161139A1 - Reversible varnishing plate - Google Patents

Reversible varnishing plate Download PDF

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Publication number
EP2161139A1
EP2161139A1 EP09167355A EP09167355A EP2161139A1 EP 2161139 A1 EP2161139 A1 EP 2161139A1 EP 09167355 A EP09167355 A EP 09167355A EP 09167355 A EP09167355 A EP 09167355A EP 2161139 A1 EP2161139 A1 EP 2161139A1
Authority
EP
European Patent Office
Prior art keywords
varnishing
layer
plate according
previous
support 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.)
Withdrawn
Application number
EP09167355A
Other languages
German (de)
French (fr)
Other versions
EP2161139A8 (en
Inventor
Marcello Franchini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tyref Srl
Original Assignee
Tyref Srl
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Filing date
Publication date
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Application filed by Tyref Srl filed Critical Tyref Srl
Publication of EP2161139A1 publication Critical patent/EP2161139A1/en
Publication of EP2161139A8 publication Critical patent/EP2161139A8/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • 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
    • B41N7/005—Coating of the composition; Moulding; Reclaiming; Finishing; Trimming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/02—Dusting, e.g. with an anti-offset powder for obtaining raised printing such as by thermogravure ; Varnishing
    • 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

Definitions

  • the present invention relates to a varnishing plate, and in particular to a reversible varnishing plate, known also with the name of varnishing caoutchouc, which can be employed in the printing machines for offset printings.
  • US 6205922 discloses a reversible printing blanket, therefore not a varnishing plate, comprising at least one support layer arranged between two printing surfaces, wherein one or more polymeric layers are firmly joined between the support layer and the printing surfaces.
  • the printing surfaces and/or the polymeric layers have different physical and/or chemical characteristics, so that with the same blanket two different printing processes can be carried out by simply reversing the printing blanket.
  • both varnishing surfaces of the varnishing plate according to the present invention can be partially detached from the support layer, so that a varnishing surface or the opposite surface can be employed by reversing the varnishing plate.
  • Different configurations of the varnishing plate can be obtained by employing polymeric layers which allow an easier removal of a varnishing surface from the support layer and/or compressible layers which allow to absorb thickness differences or irregularities, if any, of the support to be varnished and/or stabilizing layers which reduce the movements in the directions parallel to the varnishing surface.
  • the varnishing plate according to the first embodiment comprises in a known way at least two varnishing surfaces 1, 2, for example of nitrile rubber, butyl rubber, EPDM (Ethylene-Propylene-Diene-Monomer) rubber, SBR (Styrene Butadiene Rubber) rubber, polyurethane, polypropylene, polyethylene, PVC (polyvinyl chloride) or other thermosetting or thermoplastic elastomers, having a thickness comprised between 0,02 mm and 1 mm and/or a hardness comprised between 30 and 95 ShA (Shore A).
  • varnishing surfaces 1, 2 for example of nitrile rubber, butyl rubber, EPDM (Ethylene-Propylene-Diene-Monomer) rubber, SBR (Styrene Butadiene Rubber) rubber, polyurethane, polypropylene, polyethylene, PVC (polyvinyl chloride) or other thermosetting or thermoplastic elastomers, having a thickness comprised between 0,02
  • At least one support layer 3 is arranged between varnishing surfaces 1, 2 and is made for example of a paper material, plastic material such as polyester, polyethylene, polypropylene, PVC, PMMA, PC, or metallic material such as aluminum or steel.
  • Support layer 3 has a thickness comprised between 0,05 and 1 mm and/or a Young Module comprised between 1000 MPa and 15000 MPa (ASTM) and/or a break resistance comprised between 5 and 500 MPa (ASTM).
  • At least one polymeric layer 4 is arranged between support layer 3 and varnishing plates 1 and/or 2.
  • the polymeric layer is joined to varnishing plate 1.
  • Polymeric layer 4 comprises for example adhesive resins polyester-based, polyurethane-based, epoxy, NBR rubber, EPDM rubber or other thermoplastic or thermosetting elastomers.
  • Polymeric layer 4 has a thickness comprised between 0,02 mm and 1 mm and/or a hardness comprised between 30 and 95 ShA (Shore A).
  • Both surfaces of support layer 3 are coated by a removable adhesive 5, so that varnishing surface 2 and/or polymeric layer 4 joined to varnishing surface 1 can be detached from support layer 3.
  • the adhesive force of removable adhesive 5 is lower than 0,6 N/mm, in particular lower than 0,2 N/mm and greater than 0,01 N/mm (ISO 32 or ISO 8510-2).
  • the varnishing plate according to the second embodiment comprises a further polymeric layer 6 arranged between support layer 3 and varnishing surface 2.
  • the varnishing plate according to the third embodiment comprises at least one compressible layer 7 arranged between support layer 3 and varnishing surface 2.
  • Compressible layer 7 comprises a layer in an expanded polymeric material with closed cells and/or can contain microspheres.
  • compressible layer 7 can comprise a thermosetting elastomer made of NBR (Nitrile Butadiene Rubber), EPDM, IR (Isoprene Rubber), IIR (Isobutene Isoprene Rubber) rubber.
  • Compressible layer 7 has a thickness comprised between 0,1 mm and 1 mm, and a density lower than 1,4 Kg/dm 3 .
  • the density of compressible layer 7 is preferably lower than the density of polymeric layers 4 and/or 6.
  • the varnishing plate according to the fourth embodiment comprises at least one stabilizing layer 8 arranged between support layer 3 and varnishing surface 2, in particular between polymeric layer 6 and varnishing surface 2.
  • Stabilizing layer 8 comprises for example a technical fabric or a thin layer of polyester with a thickness of 0,5 mm or a high-tenacity elastomeric layer reinforced with natural, polymeric or metallic short fibers.
  • Said technical fabric can be for example a cotton fabric with 23 warp yarns per cm and 18 weft yarns per cm, having a thickness of 0,35 mm and a break load of about 500 N.
  • a high-tenacity polymeric layer can be used, such as for example a thermosetting polyurethane or other thermosetting elastomer, reinforced with fibers made of Polyvinyl alcohol (PVA), Kevlar, steel or other resistant fibers.
  • PVA Polyvinyl alcohol
  • Kevlar Kevlar
  • the varnishing plate according to the fifth embodiment comprises a stabilizing layer 8 arranged between support layer 3 and varnishing surface 2, in particular between compressible layer 7 and varnishing surface 2.
  • the varnishing plate according to the sixth embodiment comprises two support layers 3 which are provided with a removable adhesive 5 on one or both surfaces and are arranged between varnishing surfaces 1, 2, in turn joined to a first polymeric layer 4 and/or to a second polymeric layer 6, respectively.
  • a compressible layer 7 and/or a polymeric layer are arranged between support layers 3.
  • the varnishing plate according to the seventh embodiment comprises a support layer 3 arranged between two polymeric layers 4, 6, wherein a compressible layer 7 is arranged between polymeric layer 6 and varnishing surface 2.
  • Removable adhesive 5 can include and/or consist of any surface treatment or substance which are not adhesive in themselves but which allow the joining in a removable manner and therefore the easy removal of varnishing surfaces 1, 2 from support layer 3.
  • said substance can be a thermo-activable substance applied to the surfaces of support layer 3 and/or to the surfaces contacting the latter before the vulcanization of varnishing surfaces 1, 2 together with support layer 3, so that during this vulcanization said joining to support layer 3 is obtained.

Landscapes

  • Laminated Bodies (AREA)
  • Distribution Board (AREA)
  • Drawing Aids And Blackboards (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Confectionery (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

Varnishing plate comprising at least one support layer (3) arranged between at least two varnishing surfaces (1, 2), wherein both surfaces of the support layer (3) are coated by a removable adhesive (5), so that both varnishing surfaces (1, 2) can be detached from the support layer (3).

Description

  • The present invention relates to a varnishing plate, and in particular to a reversible varnishing plate, known also with the name of varnishing caoutchouc, which can be employed in the printing machines for offset printings.
  • US 6205922 discloses a reversible printing blanket, therefore not a varnishing plate, comprising at least one support layer arranged between two printing surfaces, wherein one or more polymeric layers are firmly joined between the support layer and the printing surfaces.
  • The printing surfaces and/or the polymeric layers have different physical and/or chemical characteristics, so that with the same blanket two different printing processes can be carried out by simply reversing the printing blanket.
  • It is therefore an object of the present invention to provide a varnishing plate, which can be employed for more than two different printing processes. Said object is achieved with a varnishing plate, whose main features are disclosed in the first claim, while other features are disclosed in the remaining claims.
  • Thanks to a removable adhesive on the surfaces of the support layer, both varnishing surfaces of the varnishing plate according to the present invention can be partially detached from the support layer, so that a varnishing surface or the opposite surface can be employed by reversing the varnishing plate.
  • Different configurations of the varnishing plate can be obtained by employing polymeric layers which allow an easier removal of a varnishing surface from the support layer and/or compressible layers which allow to absorb thickness differences or irregularities, if any, of the support to be varnished and/or stabilizing layers which reduce the movements in the directions parallel to the varnishing surface.
  • Further advantages and features of the varnishing plate according to the present invention will become clear to those skilled in the art from the following detailed and non-limiting description of seven embodiments thereof with reference to the attached drawings, wherein:
    • figures 1 to 7 show a sectioned view of each embodiment.
  • Referring to figure 1, it is seen that the varnishing plate according to the first embodiment comprises in a known way at least two varnishing surfaces 1, 2, for example of nitrile rubber, butyl rubber, EPDM (Ethylene-Propylene-Diene-Monomer) rubber, SBR (Styrene Butadiene Rubber) rubber, polyurethane, polypropylene, polyethylene, PVC (polyvinyl chloride) or other thermosetting or thermoplastic elastomers, having a thickness comprised between 0,02 mm and 1 mm and/or a hardness comprised between 30 and 95 ShA (Shore A).
  • At least one support layer 3 is arranged between varnishing surfaces 1, 2 and is made for example of a paper material, plastic material such as polyester, polyethylene, polypropylene, PVC, PMMA, PC, or metallic material such as aluminum or steel. Support layer 3 has a thickness comprised between 0,05 and 1 mm and/or a Young Module comprised between 1000 MPa and 15000 MPa (ASTM) and/or a break resistance comprised between 5 and 500 MPa (ASTM).
  • At least one polymeric layer 4 is arranged between support layer 3 and varnishing plates 1 and/or 2. In particular, the polymeric layer is joined to varnishing plate 1. Polymeric layer 4 comprises for example adhesive resins polyester-based, polyurethane-based, epoxy, NBR rubber, EPDM rubber or other thermoplastic or thermosetting elastomers. Polymeric layer 4 has a thickness comprised between 0,02 mm and 1 mm and/or a hardness comprised between 30 and 95 ShA (Shore A).
  • Both surfaces of support layer 3 are coated by a removable adhesive 5, so that varnishing surface 2 and/or polymeric layer 4 joined to varnishing surface 1 can be detached from support layer 3. The adhesive force of removable adhesive 5 is lower than 0,6 N/mm, in particular lower than 0,2 N/mm and greater than 0,01 N/mm (ISO 32 or ISO 8510-2).
  • Referring to figure 2, it is seen that the varnishing plate according to the second embodiment comprises a further polymeric layer 6 arranged between support layer 3 and varnishing surface 2.
  • Referring to figure 3, it is seen that the varnishing plate according to the third embodiment comprises at least one compressible layer 7 arranged between support layer 3 and varnishing surface 2. Compressible layer 7 comprises a layer in an expanded polymeric material with closed cells and/or can contain microspheres. For example, compressible layer 7 can comprise a thermosetting elastomer made of NBR (Nitrile Butadiene Rubber), EPDM, IR (Isoprene Rubber), IIR (Isobutene Isoprene Rubber) rubber. Compressible layer 7 has a thickness comprised between 0,1 mm and 1 mm, and a density lower than 1,4 Kg/dm3. The density of compressible layer 7 is preferably lower than the density of polymeric layers 4 and/or 6.
  • Referring to figure 4, it is seen that the varnishing plate according to the fourth embodiment comprises at least one stabilizing layer 8 arranged between support layer 3 and varnishing surface 2, in particular between polymeric layer 6 and varnishing surface 2. Stabilizing layer 8 comprises for example a technical fabric or a thin layer of polyester with a thickness of 0,5 mm or a high-tenacity elastomeric layer reinforced with natural, polymeric or metallic short fibers. Said technical fabric can be for example a cotton fabric with 23 warp yarns per cm and 18 weft yarns per cm, having a thickness of 0,35 mm and a break load of about 500 N. For example, for the same purpose a high-tenacity polymeric layer can be used, such as for example a thermosetting polyurethane or other thermosetting elastomer, reinforced with fibers made of Polyvinyl alcohol (PVA), Kevlar, steel or other resistant fibers.
  • Referring to figure 5, it is seen that the varnishing plate according to the fifth embodiment comprises a stabilizing layer 8 arranged between support layer 3 and varnishing surface 2, in particular between compressible layer 7 and varnishing surface 2.
  • Referring to figure 6, it is seen that the varnishing plate according to the sixth embodiment comprises two support layers 3 which are provided with a removable adhesive 5 on one or both surfaces and are arranged between varnishing surfaces 1, 2, in turn joined to a first polymeric layer 4 and/or to a second polymeric layer 6, respectively. A compressible layer 7 and/or a polymeric layer are arranged between support layers 3.
  • Referring to figure 7, it is seen that the varnishing plate according to the seventh embodiment comprises a support layer 3 arranged between two polymeric layers 4, 6, wherein a compressible layer 7 is arranged between polymeric layer 6 and varnishing surface 2.
  • Removable adhesive 5 can include and/or consist of any surface treatment or substance which are not adhesive in themselves but which allow the joining in a removable manner and therefore the easy removal of varnishing surfaces 1, 2 from support layer 3. In particular, said substance can be a thermo-activable substance applied to the surfaces of support layer 3 and/or to the surfaces contacting the latter before the vulcanization of varnishing surfaces 1, 2 together with support layer 3, so that during this vulcanization said joining to support layer 3 is obtained.
  • Further modifications and/or additions may be made by those skilled in the art to the hereinabove disclosed and illustrated embodiments while remaining within the scope of the following claims.

Claims (12)

  1. Varnishing plate comprising at least one support layer (3) arranged between at least two varnishing surfaces (1, 2), characterized in that both surfaces of the support layer (3) are coated by a removable adhesive (5), so that both varnishing surfaces (1, 2) can be detached from the support layer (3).
  2. Varnishing plate according to the previous claim, characterized in that the adhesive force of the removable adhesive (5) is lower than 0,6 N/mm, in particular lower than 0,2 N/mm and greater than 0,01 N/mm (ISO 32 or ISO 8510-2).
  3. Varnishing plate according to one of the previous claims, characterized in that the support layer (3) has a thickness comprised between 0,05 mm and 1 mm and/or a Young Module comprised between 1000 MPa and 15000 MPa (ASTM) and/or a break resistance comprised between 5 and 500 MPa (ASTM).
  4. Varnishing plate according to one of the previous claims, characterized in that at least one polymeric layer (4; 6) is arranged between the support layer (3) and a varnishing surface (1, 2).
  5. Varnishing plate according to the previous claim, characterized in that the polymeric layer (4; 6) has a thickness comprised between 0,02 mm and 1 mm.
  6. Varnishing plate according to one of the previous claims, characterized in that at least one compressible layer (7) is arranged between the support layer (3) and a varnishing surface (2).
  7. Varnishing plate according to the previous claim, characterized in that the density of the compressible layer (7) is lower than the density of the polymeric layer (4; 6).
  8. Varnishing plate according to claim 6 or 7, characterized in that the compressible layer (7) is arranged between a polymeric layer (6) and a varnishing surface (2).
  9. Varnishing plate according to one of the previous claims, characterized in that at least one stabilizing layer (8) is arranged between the support layer (3) and a varnishing surface (2).
  10. Varnishing plate according to the previous claim, characterized in that the stabilizing layer (8) is arranged between a polymeric layer (6) and a varnishing surface (2).
  11. Varnishing plate according to claim 9 or 10, characterized in that the stabilizing layer (8) is arranged between a compressible layer (7) and a varnishing surface (2).
  12. Varnishing plate according to one of the previous claims, characterized in that two support layers (3) are arranged between the varnishing surfaces (1, 2), wherein a compressible layer (7) and/or a polymeric layer are arranged between the support layers (3).
EP09167355A 2008-08-08 2009-08-06 Reversible varnishing plate Withdrawn EP2161139A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI2008A001504A IT1391105B1 (en) 2008-08-08 2008-08-08 REVERSIBLE PAINTING SLAB

Publications (2)

Publication Number Publication Date
EP2161139A1 true EP2161139A1 (en) 2010-03-10
EP2161139A8 EP2161139A8 (en) 2010-09-29

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ID=40809837

Family Applications (1)

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EP09167355A Withdrawn EP2161139A1 (en) 2008-08-08 2009-08-06 Reversible varnishing plate

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EP (1) EP2161139A1 (en)
IT (1) IT1391105B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120192739A1 (en) * 2011-01-31 2012-08-02 Printing Research, Inc. Reversible Anti-Marking Jackets and Methods of Using
EP2552707A4 (en) * 2010-03-30 2016-05-25 Hewlett Packard Development Co Image transfer blanket
US9862180B2 (en) 2012-05-02 2018-01-09 Printing Research, Inc Beaded partially coated anti-marking jackets

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142508A1 (en) * 1991-12-21 1993-06-24 Celfa Ag Offset printing varnishing plate - comprises hard and non-distorting carrier plate with soft layer covered by photosensitive material
WO1997043130A1 (en) * 1996-05-10 1997-11-20 Rollin S.A. Reversible printing blanket
US5845575A (en) * 1996-09-24 1998-12-08 Nippon Paper Industries Co., Ltd. Varnishing film and method of adjusting the surface gloss of prepress color proof using the same
EP1591268A1 (en) * 2004-04-26 2005-11-02 CHIORINO S.p.A. A method for treating the printing layer of a printing blanket or a varnishing plate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142508A1 (en) * 1991-12-21 1993-06-24 Celfa Ag Offset printing varnishing plate - comprises hard and non-distorting carrier plate with soft layer covered by photosensitive material
WO1997043130A1 (en) * 1996-05-10 1997-11-20 Rollin S.A. Reversible printing blanket
US6205922B1 (en) 1996-05-10 2001-03-27 Rollin S.A. Reversible printing blanket
US5845575A (en) * 1996-09-24 1998-12-08 Nippon Paper Industries Co., Ltd. Varnishing film and method of adjusting the surface gloss of prepress color proof using the same
EP1591268A1 (en) * 2004-04-26 2005-11-02 CHIORINO S.p.A. A method for treating the printing layer of a printing blanket or a varnishing plate

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2552707A4 (en) * 2010-03-30 2016-05-25 Hewlett Packard Development Co Image transfer blanket
US20120192739A1 (en) * 2011-01-31 2012-08-02 Printing Research, Inc. Reversible Anti-Marking Jackets and Methods of Using
US8677899B2 (en) * 2011-01-31 2014-03-25 Printing Research, Inc. Reversible anti-marking jackets and methods of using
US9862180B2 (en) 2012-05-02 2018-01-09 Printing Research, Inc Beaded partially coated anti-marking jackets

Also Published As

Publication number Publication date
ITMI20081504A1 (en) 2010-02-09
EP2161139A8 (en) 2010-09-29
IT1391105B1 (en) 2011-11-18

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