EP1591270A1 - Compressible element for varnishing plates or for printing blankets for offset printing and flexography - Google Patents

Compressible element for varnishing plates or for printing blankets for offset printing and flexography Download PDF

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Publication number
EP1591270A1
EP1591270A1 EP04425287A EP04425287A EP1591270A1 EP 1591270 A1 EP1591270 A1 EP 1591270A1 EP 04425287 A EP04425287 A EP 04425287A EP 04425287 A EP04425287 A EP 04425287A EP 1591270 A1 EP1591270 A1 EP 1591270A1
Authority
EP
European Patent Office
Prior art keywords
compressible element
printing
layer
projections
compressible
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Withdrawn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
EP04425287A
Other languages
German (de)
French (fr)
Inventor
Dario Nichetti
Giorgio Borri
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.)
CHIORINO SpA
Original Assignee
CHIORINO SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CHIORINO SpA filed Critical CHIORINO SpA
Priority to EP04425287A priority Critical patent/EP1591270A1/en
Publication of EP1591270A1 publication Critical patent/EP1591270A1/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Withdrawn legal-status Critical Current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
    • B41N10/02—Blanket structure
    • B41N10/06—Blanket structure facilitating fastening to, or location on, supports
    • 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
    • B41N10/02—Blanket structure
    • 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
    • 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
    • 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
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/02—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
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/04—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
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/06—Backcoats; Back layers; Bottom 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
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/14—Location or type of the layers in multi-layer blankets or like coverings characterised by macromolecular organic compounds

Definitions

  • the present invention relates, in general, to offset printing and flexography.
  • printing blankets mounted on the outer surface of printing cylinders are used.
  • Said printing blankets have outer ink receiving surfaces, which transfer the images to be printed on the print sheets which are fed between the printing cylinder and an impression cylinder.
  • a varnishing step is occasionally performed, in which a layer of clear varnish is applied on the previously printed sheet.
  • a varnishing plate is used, mounted on a cylinder with the interposition of a compressible element.
  • the present invention relates to a compressible element for use as an "under blanket” for a varnishing plate.
  • the invention further relates to a printing blanket provided with such a compressible element.
  • the presence of a compressible element under a varnishing plate is essential to distribute pressure uniformly and improve the quality of application of the varnish layer.
  • the compressible element is also one of the main components of the structure of a printing blanket.
  • the compressible element for a varnishing plate or for a printing blanket must have uniform thickness and must have the ability to compress in regular fashion.
  • a compressible element for a varnishing plate use is generally made of a printing blanket (which structurally contains a compressible layer of expanded rubber) or a layer of expanded material.
  • the compressibility of an expanded material is manifested by effect of the deformation of micro-cells or micro-cavities under the action of a compression force and of their return to the initial configuration after the force is removed. This generates a hysteresis phenomenon between the phases of compression and decompression of the compressible layer, which leads to lack of uniformity in printing quality. Moreover, because of the presence of micro-cells, the compression and decompression cycles generate permanent deformations which over time cause a decrease in the initial thickness and changes in the characteristics of resilience of the product.
  • the object of the present invention is to provide a compressible element for a varnishing plate and a printing blanket equipped with such a compressible element, which allow to overcome said drawbacks.
  • said object is achieved by a compressible element and by a printing blanket including such a compressible element, having the characteristics set out in the claims.
  • the number 10 designates a compressible element destined to be positioned under a varnishing plate for offset printing and flexography machines.
  • the compressible element 10 comprises a layer 12 comprising a plurality of projections 14, mutually distanced by empty spaces 16.
  • the projections 14 projecti in an orthogonal direction relative to a base portion 18 of the layer 13, integrally formed with the projections 14.
  • the base portion has a planar surface and the projections project in the opposite direction to said surface.
  • the head surfaces 20 of the projections 14 are substantially tangentially to a common plane.
  • the term "substantially tangential” means that the greatest deviation between the head surfaces 20 and the tangential plane to said surface is within the acceptable tolerance on the total thickness of the compressible element 10.
  • the empty spaces 16 are open on the side of the layer 12 opposite the base portion 18.
  • the width of the projections 14 measured in a parallel direction to the base surface of the compressible element 10 progressively decreases from the base portion 18 towards the head surfaces 20 of the projections 14.
  • the projections 14 preferably have the shape of continuous parallel ribs, but said projections 14 can also be in the shape of stakes or of non continuous ribs.
  • the layer 12 is made of non expanded compact elastomeric material, for example natural or synthetic vulcanised rubber or non expanded polyurethane.
  • hardness is preferably between 20 and 80 ShA.
  • hardness is preferably between 40 and 80 ShA.
  • the compressible element 10 can be provided with a support layer 22 made of textile material or of plastic material. If present, the support layer preferably has a thickness of between 0.1 and 0.5 mm. The overall thickness of the compressible element 10 is preferably between 0.5 and 2.5 mm. The maximum compressibility of the element 10 is preferably between 20-500 im.
  • the support layer 22, if textile, can be formed by polyester, polyamide, polypropylene fibres, aramidic fibres of natural textile fibres. If made of plastic material, the layer 22 can be formed by a layer with a thickness of 0.1-0.35 mm of polyester, polyamide, polypropylene or polycarbonate.
  • the ratio between the volume of the empty spaces 16 and the volume of the projections 14 influences the characteristics of compressibility of the compressible element 10.
  • the compressibility of the element 10 is such as to allow a thickness change of between 4% and 20% of the total thickness of the compressible element 10.
  • the elasticity modulus of the compressible element 10 during compression is preferably between 2000-10000 N/mm.
  • the compressible element according to the present invention has zero hysteresis (i.e., the difference in deformation percentage between the compression and decompression phase) and practically unlimited working life without the emergence of permanent deformation, which means no thickness change over time as a result of compression and decompression cycles.
  • the compressible element according to the present invention can be produced with substantially conventional calendering techniques.
  • the compressible element 10 described above can be incorporated in the structure of a printing blanket.
  • the elements corresponding to those described previously are designated by the same numeric references.
  • the reference number 30 globally designates a printing blanket for offset printing.
  • the printing blanket 30 comprises a compressible element 10 whose structure is identical to the one described above.
  • the printing blanket 30 comprises a printing layer 32 which can be constituted by synthetic or natural vulcanised rubber or by polymeric material selected within the group comprising: polyurethane, polyvinylchloride (PVC), ethylene vinyl acetate (EVA), polyethylene glycol (PEG), polypropylene glycol (PPG), polytetramethylene glycol (PTMEG), polyester, polyvinyl alcohol (PVOH), polyethylene, polypropylene and amalgams or mixtures of one or more of said materials.
  • PVC polyvinylchloride
  • EVA ethylene vinyl acetate
  • PEG polyethylene glycol
  • PPG polypropylene glycol
  • PTMEG polytetramethylene glycol
  • polyester polyvinyl alcohol (PVOH)
  • PVOH polyvinyl alcohol
  • the printing layer 32 has a smooth or embossed transfer surface 34 able to receive the printing ink.
  • the transfer surface 34 can be subjected to a plasma treatment, as described in a simultaneous patent application by the same Applicant.
  • the support layer 22 which serves as a reinforcement and/or traction layer.
  • the support layer 22 is permanently fastened to the compressible element 10 and to the printing layer 32 by gluing or by heat sealing during the calendering operation.
  • the projections 14 of the compressible layer 10 extend in the opposite direction from the printing layer 32.

Abstract

Compressible element for varnishing plates and for printing blankets for offset printing and flexography, comprising a layer (12) of compact non expanded elastomeric material including a plurality of projections (14) mutually distanced by empty spaces (16).

Description

  • The present invention relates, in general, to offset printing and flexography. As is well known, in offset printing and flexography, printing blankets mounted on the outer surface of printing cylinders are used. Said printing blankets have outer ink receiving surfaces, which transfer the images to be printed on the print sheets which are fed between the printing cylinder and an impression cylinder. In the final step of an offset printing process, a varnishing step is occasionally performed, in which a layer of clear varnish is applied on the previously printed sheet. In the varnishing station of an offset printing machine, a varnishing plate is used, mounted on a cylinder with the interposition of a compressible element.
  • The present invention relates to a compressible element for use as an "under blanket" for a varnishing plate. The invention further relates to a printing blanket provided with such a compressible element.
  • The presence of a compressible element under a varnishing plate is essential to distribute pressure uniformly and improve the quality of application of the varnish layer. The compressible element is also one of the main components of the structure of a printing blanket. The compressible element for a varnishing plate or for a printing blanket must have uniform thickness and must have the ability to compress in regular fashion. As a compressible element for a varnishing plate, use is generally made of a printing blanket (which structurally contains a compressible layer of expanded rubber) or a layer of expanded material.
  • The compressibility of an expanded material is manifested by effect of the deformation of micro-cells or micro-cavities under the action of a compression force and of their return to the initial configuration after the force is removed. This generates a hysteresis phenomenon between the phases of compression and decompression of the compressible layer, which leads to lack of uniformity in printing quality. Moreover, because of the presence of micro-cells, the compression and decompression cycles generate permanent deformations which over time cause a decrease in the initial thickness and changes in the characteristics of resilience of the product.
  • The loss or modification of the elastic characteristics of the expanded material thus leads to the need periodically to replace the printing blanket or the compressible element for a varnishing plate.
  • The object of the present invention is to provide a compressible element for a varnishing plate and a printing blanket equipped with such a compressible element, which allow to overcome said drawbacks.
  • According to the present invention, said object is achieved by a compressible element and by a printing blanket including such a compressible element, having the characteristics set out in the claims.
  • The present invention shall now be described in detail with reference to the accompanying drawings, provided purely by way of non limiting example, in which:
    • Figure 1 is a schematic section of a compressible element for a varnishing plate, and
    • Figure 2 is a schematic section of a printing blanket including such a compressible element.
  • With reference to Figure 1, the number 10 designates a compressible element destined to be positioned under a varnishing plate for offset printing and flexography machines. The compressible element 10 comprises a layer 12 comprising a plurality of projections 14, mutually distanced by empty spaces 16. The projections 14 projecti in an orthogonal direction relative to a base portion 18 of the layer 13, integrally formed with the projections 14. The base portion has a planar surface and the projections project in the opposite direction to said surface.
  • The head surfaces 20 of the projections 14 are substantially tangentially to a common plane. The term "substantially tangential" means that the greatest deviation between the head surfaces 20 and the tangential plane to said surface is within the acceptable tolerance on the total thickness of the compressible element 10. The empty spaces 16 are open on the side of the layer 12 opposite the base portion 18. Preferably, the width of the projections 14 measured in a parallel direction to the base surface of the compressible element 10 progressively decreases from the base portion 18 towards the head surfaces 20 of the projections 14. The projections 14 preferably have the shape of continuous parallel ribs, but said projections 14 can also be in the shape of stakes or of non continuous ribs.
  • The layer 12 is made of non expanded compact elastomeric material, for example natural or synthetic vulcanised rubber or non expanded polyurethane. In the case of vulcanised rubber, hardness is preferably between 20 and 80 ShA. In the case of non expanded polyurethane, hardness is preferably between 40 and 80 ShA.
  • The compressible element 10 can be provided with a support layer 22 made of textile material or of plastic material. If present, the support layer preferably has a thickness of between 0.1 and 0.5 mm. The overall thickness of the compressible element 10 is preferably between 0.5 and 2.5 mm. The maximum compressibility of the element 10 is preferably between 20-500 im. The support layer 22, if textile, can be formed by polyester, polyamide, polypropylene fibres, aramidic fibres of natural textile fibres. If made of plastic material, the layer 22 can be formed by a layer with a thickness of 0.1-0.35 mm of polyester, polyamide, polypropylene or polycarbonate.
  • The ratio between the volume of the empty spaces 16 and the volume of the projections 14 influences the characteristics of compressibility of the compressible element 10. By varying the ratio between the volume of the empty spaces and of the projections 14, it is possible to vary the characteristics of compressibility of the element 10. Preferably, the compressibility of the element 10 is such as to allow a thickness change of between 4% and 20% of the total thickness of the compressible element 10.
  • The elasticity modulus of the compressible element 10 during compression is preferably between 2000-10000 N/mm.
  • Tests conducted by the Applicant have shown that, with respect to compressible elements made of expanded material for varnishing plates, the compressible element according to the present invention has zero hysteresis (i.e., the difference in deformation percentage between the compression and decompression phase) and practically unlimited working life without the emergence of permanent deformation, which means no thickness change over time as a result of compression and decompression cycles. The compressible element according to the present invention can be produced with substantially conventional calendering techniques.
  • With reference to Figure 2, the compressible element 10 described above can be incorporated in the structure of a printing blanket. In Figure 2, the elements corresponding to those described previously are designated by the same numeric references. The reference number 30 globally designates a printing blanket for offset printing. The printing blanket 30 comprises a compressible element 10 whose structure is identical to the one described above.
  • The printing blanket 30 comprises a printing layer 32 which can be constituted by synthetic or natural vulcanised rubber or by polymeric material selected within the group comprising: polyurethane, polyvinylchloride (PVC), ethylene vinyl acetate (EVA), polyethylene glycol (PEG), polypropylene glycol (PPG), polytetramethylene glycol (PTMEG), polyester, polyvinyl alcohol (PVOH), polyethylene, polypropylene and amalgams or mixtures of one or more of said materials.
  • The printing layer 32 has a smooth or embossed transfer surface 34 able to receive the printing ink. The transfer surface 34 can be subjected to a plasma treatment, as described in a simultaneous patent application by the same Applicant.
  • Between the printing layer 32 and the compressible element 10 is positioned the support layer 22 which serves as a reinforcement and/or traction layer. The support layer 22 is permanently fastened to the compressible element 10 and to the printing layer 32 by gluing or by heat sealing during the calendering operation. Preferably the projections 14 of the compressible layer 10 extend in the opposite direction from the printing layer 32.

Claims (12)

  1. A compressible element for a varnishing plate and for a printing blanked for offset printing and flexography, characterised in that it comprises a layer (12) of non expanded compact elastomeric material including a plurality of projections (14), mutually distanced by empty spaces (16).
  2. A compressible element as claimed in claim 1, characterised in that the projections (12) have head surfaces (20) that are substantially tangential to a common plane.
  3. Compressible element as claimed in claim 1, characterised in that the layer of elastomeric material is constituted by material chosen within the group comprising: natural or synthetic vulcanised rubber and non expanded polyurethane.
  4. Compressible element as claimed in claim 1, characterised in that the projections have progressively decreasing dimensions towards their summits.
  5. Compressible element as claimed in claim 1, characterised in that the ratio between the volume of the empty spaces (16) and the volume of the projections (14) is determined in such a way as to obtain a maximum compressibility of between 4% and 20%.
  6. Compressible element as claimed in claim 1, characterised in that it comprises a support layer (22) formed by textile fibres or by a layer of plastic material.
  7. Compressible element as claimed in claim 1, characterised in that the elastomeric layer (12) has a hardness of between 20-80 ShA.
  8. Compressible element as claimed in claim 1, characterised in that it has a total thickness of between 0.5 and 2.5 mm and it has a maximum compressibility of between 20 and 500 im.
  9. Compressible element as claimed in claim 7, characterised in that said base layer (22) has a thickness of between 0.1 and 0.5 mm.
  10. Compressible element as claimed in claim 1, characterised in that it has an elasticity module between 2000 and 10000 N/mm.
  11. A printing blanket for offset printing, characterised in that it comprises a printing layer (32), with a printing surface (34), a support layer (22) fastened to a surface of the printing layer (32) that is opposite to the printing surface (32) and a compressible element (10) of compact, non expanded elastomeric material fastened to the support layer (22) and including a plurality of projections (14) mutually distanced by empty spaces (16).
  12. Printing blanket as claimed in claim 1, characterised in that said projections (14) extends in a direction opposite to the printing layer (32).
EP04425287A 2004-04-26 2004-04-26 Compressible element for varnishing plates or for printing blankets for offset printing and flexography Withdrawn EP1591270A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04425287A EP1591270A1 (en) 2004-04-26 2004-04-26 Compressible element for varnishing plates or for printing blankets for offset printing and flexography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04425287A EP1591270A1 (en) 2004-04-26 2004-04-26 Compressible element for varnishing plates or for printing blankets for offset printing and flexography

Publications (1)

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EP1591270A1 true EP1591270A1 (en) 2005-11-02

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EP04425287A Withdrawn EP1591270A1 (en) 2004-04-26 2004-04-26 Compressible element for varnishing plates or for printing blankets for offset printing and flexography

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009010123A1 (en) * 2007-07-13 2009-01-22 Trelleborg Engineered Systems Italy S.P.A. Coating for a printing machine blanket cylinder, cylinder with such coating built in, machine with such cylinder built in, and method for positioning a blanket cylinder in a printing machine
EP2070716A1 (en) 2007-12-10 2009-06-17 Folex Coating GmbH Flexible underlay under rubber blanket in offset print
ITMI20100850A1 (en) * 2010-05-13 2011-11-14 Printgraph Waterless S P A BLANKET PARTICULARLY FOR PAINTING MACHINES FOR OPTIMUM RESERVE OBTAINING
EP3283296A4 (en) * 2015-04-14 2018-10-24 Ball Corporation Variable printing process using flexible secondary plates and specialty inks
US10195842B2 (en) 2013-06-11 2019-02-05 Ball Corporation Apparatus for forming high definition lithographic images on containers

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1119498A (en) * 1913-12-27 1914-12-01 Samuel E Dittman Material for building up printing-plates.
US2534137A (en) * 1946-03-25 1950-12-12 M B Mfg Company Inc Vibration isolator pad
US3425347A (en) * 1968-02-29 1969-02-04 Electrographic Corp Resilient printing plate
DE1546788A1 (en) * 1964-09-22 1970-07-23 Minnesota Mining & Mfg Indestructible coating for the cylinders of lithographic offset printing machines
US4025685A (en) * 1974-09-06 1977-05-24 Dayco Corporation Compressible printing blanket and method of manufacture
US5894799A (en) * 1997-10-01 1999-04-20 E. I. Du Pont De Nemours And Company Element for cushioning a flexographic printing plate
EP1270260A1 (en) * 2001-06-18 2003-01-02 Jeffrey Albert Randazzo Shock absorber cushion for flexographic printing plate and method of use

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1119498A (en) * 1913-12-27 1914-12-01 Samuel E Dittman Material for building up printing-plates.
US2534137A (en) * 1946-03-25 1950-12-12 M B Mfg Company Inc Vibration isolator pad
DE1546788A1 (en) * 1964-09-22 1970-07-23 Minnesota Mining & Mfg Indestructible coating for the cylinders of lithographic offset printing machines
US3425347A (en) * 1968-02-29 1969-02-04 Electrographic Corp Resilient printing plate
US4025685A (en) * 1974-09-06 1977-05-24 Dayco Corporation Compressible printing blanket and method of manufacture
US5894799A (en) * 1997-10-01 1999-04-20 E. I. Du Pont De Nemours And Company Element for cushioning a flexographic printing plate
EP1270260A1 (en) * 2001-06-18 2003-01-02 Jeffrey Albert Randazzo Shock absorber cushion for flexographic printing plate and method of use

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009010123A1 (en) * 2007-07-13 2009-01-22 Trelleborg Engineered Systems Italy S.P.A. Coating for a printing machine blanket cylinder, cylinder with such coating built in, machine with such cylinder built in, and method for positioning a blanket cylinder in a printing machine
EP2070716A1 (en) 2007-12-10 2009-06-17 Folex Coating GmbH Flexible underlay under rubber blanket in offset print
ITMI20100850A1 (en) * 2010-05-13 2011-11-14 Printgraph Waterless S P A BLANKET PARTICULARLY FOR PAINTING MACHINES FOR OPTIMUM RESERVE OBTAINING
US10195842B2 (en) 2013-06-11 2019-02-05 Ball Corporation Apparatus for forming high definition lithographic images on containers
US10850497B2 (en) 2013-06-11 2020-12-01 Ball Corporation Apparatus and method for forming high definition lithographic images on containers
EP3283296A4 (en) * 2015-04-14 2018-10-24 Ball Corporation Variable printing process using flexible secondary plates and specialty inks

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