US3730092A - Magnetic sheet for impression cylinder - Google Patents

Magnetic sheet for impression cylinder Download PDF

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Publication number
US3730092A
US3730092A US00121332A US3730092DA US3730092A US 3730092 A US3730092 A US 3730092A US 00121332 A US00121332 A US 00121332A US 3730092D A US3730092D A US 3730092DA US 3730092 A US3730092 A US 3730092A
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US
United States
Prior art keywords
magnetic
blanket
retaining
disposed
impression
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
Application number
US00121332A
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English (en)
Inventor
J Pickard
C Weber
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.)
WR Grace and Co Conn
Original Assignee
WR Grace and Co
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Filing date
Publication date
Application filed by WR Grace and Co filed Critical WR Grace and Co
Application granted granted Critical
Publication of US3730092A publication Critical patent/US3730092A/en
Assigned to W. R. GRACE & CO.-CONN. reassignment W. R. GRACE & CO.-CONN. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: GRACE MERGER CORP. A CT CORP. (MERGED INTO), W. R. GRACE & CO. A CT. CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B41N6/00—Mounting boards; Sleeves Make-ready devices, e.g. underlays, overlays; Attaching by chemical means, e.g. vulcanising

Definitions

  • ABSTRACT The invention disclosed is directed to a laminated magnetic sheet which avoids known bolster problems and which provides an equalized effective printing pressure between a printing surface and a web of paper being printed.
  • the magnetic press sheet is a formed of a flexible magnetic material, is disposed over the substrate without bolster, and includes L- shaped edge members for retaining in position against [the surface of an impression cylinder by contact with a depression in the substrate.
  • This invention relates to a bolster free magnetic sheet for positioning over the surface of an impression cylinder. More particularly, the present invention provides a magnetic sheet retained in position by L-shaped edge retaining members and laminated by a flexible thin top sheet.
  • a blanket formed of a hard, resilient composition forms the packing material on the impression cylinder. Because of the nature of these materials and the means for retaining them onto the surface of an impression cylinder, a bolster problem appears near each terminal edge of the blanket. During the printing operation, the bolster or ridge of the blanket results in an impression against the plate resulting in a smudge line from the non-printing surface. It has now been found that by practicing the present invention, there is provided a laminated magnetic sheet which retains the desirable characteristics of a blanket on an impression cylinder and which avoids bolster problems.
  • the present invention provides a' magnetic sheet disposed over the surface of an impression cylinder having a depression thereon for receiving L-shaped edge retaining members of the magnetic sheet.
  • the magnetic sheet is laminated by a top flexible thin sheet which limits possible creeping or walking of the magnetic sheet during high speed printing. Positioning of the magnetic sheet using the L-shaped edge members, and further use of the flexible thin top sheet avoids bolster problems in printing and provides an equalized effect printing pressure between a printing surface and a web of paper being printed.
  • FIG. 1 illustrates in partial half section and diagramatically a prior art means for securing a blanket in position on an impression roll with resulting bolster near the secured edges;
  • FIG. 2 is a similar view to that of FIG. 1 except illustrating the present means for avoiding bolster problems by use of a laminated magnetic sheet;
  • FIG. 3 illustrates a composite magnetic blanket viewed as the terminal edges thereof taken in half section
  • FIG. 4 illustrates the terminal edges taken in half section of an embodiment composite magnetic blanket of the present invention.
  • FIG. 1 illustrates impression cylinder 10 having a U-shaped recess 12 removed from along a length thereof over which conventional blanket 14 is positioned.
  • Blanket I4 is generally held in position by pin 16 projecting from one surface of the U-shaped recess 12 and into a hole provided therefor in the blanket.
  • the opposite end of blanket 14 is generally secured by a suitable means 20 to a retaining belt 18 which provides tension to blanket 14 upon being wound upon roll 22.
  • the tension of blanket 14 is generally insufficient to cause the blanket to negotiate the upper surface of the U-shaped recess 16 thus resulting in a bolster 24 near one end of the blanket and a related although generally smaller bolster 26 near the opposite edge of the blanket.
  • Impression cylinder 28 includes a U- shaped recess 30 for retaining magnetic blanket 32 over impression cylinder 28 using plate 34 which results in a L-shaped terminal configuration projecting from the edge of magnetic blanket 32.
  • Over magnetic blanket 32 there appears a flexible thin top sheet 36 which may be retained in position by pin 38 designed for projecting through a hole provided therefor in sheet 36.
  • This configuration avoids bolster problems near the leading edge of the blanket and by using a plate 40 similar to that of plate 34 except positioned near the trailing edge of the blanket, bolster problems are similarly avoided.
  • Flexible thin top sheet 36 may be retained in position by securing by winding to a conventional tension roll 42.
  • the composition of magnetic blanket 32 is desirably one of elastomeric material which includes permanent magnets disposed therein.
  • Compositions of this type are well known to the art and are generally referred to as flexible magnets. A more detailed description for preparing flexible magnets is disclosed by Blume in U. S. Pat. No. 2,999,275.
  • Other related flexible magnets formed of elastomeric compositions may be employed herein, provided they maintain characteristics necessary for an impression cylinder packing material.
  • the flexible thin top sheet 36 which is laminated over the magnetic blanket 32 may be formed of material typically employed for this purpose including, for example, cloth fabrics, plastic containing materials, manila sheets, as well as combinations thereof, all well known to the art. Lamination of the top sheet over the magnetic blanket permits more effective retaining of the terminal blanket ends onto the impression cylinder and further limits creeping or walking of the magnetic plate under high speed printing conditions.
  • the plate 34 employed for retaining the magneti blanket onto the impression cylinder may be formed of most any rigid material including metal, hard plastic and the like.
  • the length of the plate which is retained by the U-shaped recess of the impression cylinder may vary provided that a sufficient length is provided for effective contact.
  • the plate may be secured by direct adhesion or other mechanical means to the magnetic blanket as desired.
  • the plate may be L- configurated and project into a composite blanket or otherwise configurated blanket exemplified by FIGS. 3-4.
  • FIG. 3 a composite blanket 44 is illustrated having a magnetic sheet portion 46 over which is disposed blanket 48 secured by any desirable means.
  • Impression blanket 48 may be formed of conventional materials which otherwise present bolster problems in the prior art. These materials include, for example, rubber, cork, or related specially formulated materials designed to permit advantages required for blankets used on impression cylinders. These advantages are described in greater detail by Hechtman et al, in U.S. Pat. No.
  • Blanket 48 may be adhesively secured by adhesive 50 to magnetic blanket 46. This adhesive may also be employed to secure retaining plate 52 which includes leg 54projecting into the composite for greater adhesion to the blanket composite 44.
  • FIG. 4 illustrates an embodiment composite blanket 56 which includes magnetic blanket 46 over which is disposed outer blanket 58.
  • Outer blanket 58 may be similar in composition to blanket 48 of FIG. 3.
  • shaped retaining member 60 is formed as an extension of the magnetic blanket 46 and is adhesively secured by a suitable adhesive 62.
  • Adhesive 64 in combination with adhesive 62 is illustrated retaining an intermediate flexible magnetizable metallic sheet 66 in position to form the composite blanket 56. It appears that presence of such an intermediate sheet 66 influences greater magnetic securing of magnetic blanket 46 onto the impression cylinder.
  • the present magnetic sheet provides its great utility in situations where the impression cylinder is formed with a surfacing to which a magnetic material may adhere.
  • an impression printing roll having a cylindrical body and a longitudinal grooved cut-out axially disposed along the outer cylindrical surface, said cut-out having a tension roll disposed therein and a retaining means along one wall thereof, a magnetic blanket comprising an elastomeric material magnetic particle containing sheet having a retaining plate secured to a leading and a trailing edge thereof, said retaining plates retained in position within said grooved cut-out with said magnetic. blanket disposed in complete contact about the outer cylindrical surface, and a flexible thin sheet having means secured at one end for engagement with said retaining means along one wall of the cut-out with opposite end having a surface for engagement with the tension roll, said flexible thin sheet laminated over the magnetic blanket.

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  • Printing Plates And Materials Therefor (AREA)
US00121332A 1971-03-05 1971-03-05 Magnetic sheet for impression cylinder Expired - Lifetime US3730092A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12133271A 1971-03-05 1971-03-05

Publications (1)

Publication Number Publication Date
US3730092A true US3730092A (en) 1973-05-01

Family

ID=22396001

Family Applications (1)

Application Number Title Priority Date Filing Date
US00121332A Expired - Lifetime US3730092A (en) 1971-03-05 1971-03-05 Magnetic sheet for impression cylinder

Country Status (7)

Country Link
US (1) US3730092A (enrdf_load_stackoverflow)
BE (1) BE779605A (enrdf_load_stackoverflow)
CH (1) CH543389A (enrdf_load_stackoverflow)
DE (1) DE2204872A1 (enrdf_load_stackoverflow)
FR (1) FR2127709A5 (enrdf_load_stackoverflow)
IT (1) IT949847B (enrdf_load_stackoverflow)
NL (1) NL7202267A (enrdf_load_stackoverflow)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3125300A1 (de) * 1980-07-25 1982-03-25 W.R. Grace & Co., 02140 Cambridge, Mass. Verfahren zur herstellung des aufzuges eines offset-druckzylinders sowie aufzug fuer einen offset-druckzylinder
DE3614541A1 (de) * 1986-04-29 1987-11-05 Roland Man Druckmasch Vorrichtung zum festhalten von zwischenlagen an zylindern von rotationsdruckmaschinen
US4817527A (en) * 1986-03-06 1989-04-04 R.R. Donnelley & Sons Company Printing blanket with carrier plate and method of assembly
US4848229A (en) * 1986-08-02 1989-07-18 Koenig & Bauer Aktiengesellschaft Printing plate fastening and tensioning assembly
US4907508A (en) * 1987-11-24 1990-03-13 Celfa Ag Printing cylinder with rubber coating for letterpress, flexography, rotogravure and rotary offset
US5357863A (en) * 1991-11-15 1994-10-25 Day International, Inc. Printing blanket for use with a printing cylinder to achieve a narrow gap lock-up
US5505109A (en) * 1994-04-26 1996-04-09 Best Cutting Die Company Cutting die and chisel
US5570620A (en) * 1993-12-22 1996-11-05 Best Cutting Die Company Panel cutting apparatus
EP0719641A3 (de) * 1994-12-30 1997-03-05 Koenig & Bauer Albert Ag Gummituchzylinder für Offsetdruck
US5697277A (en) * 1994-05-17 1997-12-16 Best Cutting Die Company Multi use rotary die plate system
US6026725A (en) * 1995-04-10 2000-02-22 Best Cutting Die Company Panel cutting apparatus with waste repellant die structure
US6076444A (en) * 1997-08-01 2000-06-20 Best Cutting Die Company Panel cutting apparatus with selectable matrices for vacuum and air
USRE38033E1 (en) 1993-12-22 2003-03-18 Best Cutting Die Company Panel cutting apparatus
US6532854B2 (en) 1994-01-21 2003-03-18 Best Cutting Die Company Cutting die clamping mechanism
US20030188649A1 (en) * 2002-04-09 2003-10-09 Phototype Engraving Company Flexible printing plate
US20050241503A1 (en) * 2004-04-30 2005-11-03 Eduard Hoffmann Transfer blanket, in particular rubber blanket, for a printing press
US20060230961A1 (en) * 2005-04-14 2006-10-19 Man Roland Druckmaschinen Ag Ink transfer device for a printing press
US20070101884A1 (en) * 2005-11-09 2007-05-10 Czerner Richard L Printing blanket including a non-extensible backing layer and a relief area which may be mounted in a variety of lockup mechanisms
US20070227379A1 (en) * 2006-04-03 2007-10-04 Komori Corporation Plate for magnet cylinder
US20080217798A1 (en) * 2007-03-09 2008-09-11 Industrial Technology Research Institute Mold structure and the manufacturing method thereof
WO2017010970A1 (en) * 2015-07-10 2017-01-19 C.U.E., Inc. Cover for rotary die cutter anvil cylinder

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6062942U (ja) * 1983-10-03 1985-05-02 エービー　テトラパック 印刷機用版胴
AU7225187A (en) * 1986-05-01 1987-11-05 Minnesota Mining And Manufacturing Company Method and underpacking for mounting printing plates on a rotary printing press

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB368609A (en) * 1930-08-16 1932-03-10 Johannisberg Gmbh Maschf An improved device for stretching printing plates on the printing cylinders of intaglio printing machines
US1897148A (en) * 1931-04-07 1933-02-14 Multigraph Co Transfer blanket for offset printing
US2627230A (en) * 1945-05-26 1953-02-03 Hoe & Co R Blanket tensioning means
US2629324A (en) * 1947-11-17 1953-02-24 Commercial Lithograph Company Apparatus for making lithograph blankets
US2727463A (en) * 1952-01-21 1955-12-20 Tingue Brown & Co Blanketing of printing press impression cylinders
AT186648B (de) * 1953-07-28 1956-08-25 Alfred Herzer Magnetische bzw. elektromagnetische Einrichtung zum Halten von Druckbildträgern am Druckwerk von Druckmaschinen
US2793588A (en) * 1953-10-23 1957-05-28 John Waldron Corp Printing blanket mounting and tensioning apparatus
US3237558A (en) * 1962-06-04 1966-03-01 Fas Clip Corp Printing blanket and fastener means therefor
US3384014A (en) * 1966-12-09 1968-05-21 Berg Milton Sheet securing means with sheet inserted and removed axially of cylinder
US3616145A (en) * 1968-08-28 1971-10-26 Dayco Corp Magnetized printing blanket

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB368609A (en) * 1930-08-16 1932-03-10 Johannisberg Gmbh Maschf An improved device for stretching printing plates on the printing cylinders of intaglio printing machines
US1897148A (en) * 1931-04-07 1933-02-14 Multigraph Co Transfer blanket for offset printing
US2627230A (en) * 1945-05-26 1953-02-03 Hoe & Co R Blanket tensioning means
US2629324A (en) * 1947-11-17 1953-02-24 Commercial Lithograph Company Apparatus for making lithograph blankets
US2727463A (en) * 1952-01-21 1955-12-20 Tingue Brown & Co Blanketing of printing press impression cylinders
AT186648B (de) * 1953-07-28 1956-08-25 Alfred Herzer Magnetische bzw. elektromagnetische Einrichtung zum Halten von Druckbildträgern am Druckwerk von Druckmaschinen
US2793588A (en) * 1953-10-23 1957-05-28 John Waldron Corp Printing blanket mounting and tensioning apparatus
US3237558A (en) * 1962-06-04 1966-03-01 Fas Clip Corp Printing blanket and fastener means therefor
US3384014A (en) * 1966-12-09 1968-05-21 Berg Milton Sheet securing means with sheet inserted and removed axially of cylinder
US3616145A (en) * 1968-08-28 1971-10-26 Dayco Corp Magnetized printing blanket

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3125300A1 (de) * 1980-07-25 1982-03-25 W.R. Grace & Co., 02140 Cambridge, Mass. Verfahren zur herstellung des aufzuges eines offset-druckzylinders sowie aufzug fuer einen offset-druckzylinder
US4452143A (en) * 1980-07-25 1984-06-05 W. R. Grace & Co. Offset printing blanket
US4817527A (en) * 1986-03-06 1989-04-04 R.R. Donnelley & Sons Company Printing blanket with carrier plate and method of assembly
DE3614541A1 (de) * 1986-04-29 1987-11-05 Roland Man Druckmasch Vorrichtung zum festhalten von zwischenlagen an zylindern von rotationsdruckmaschinen
US4854237A (en) * 1986-04-29 1989-08-08 Man - Roland Druckmaschinen Ag Printing machine cylinder underlay holding arrangement
US4848229A (en) * 1986-08-02 1989-07-18 Koenig & Bauer Aktiengesellschaft Printing plate fastening and tensioning assembly
US4893561A (en) * 1986-08-02 1990-01-16 Koenig & Bauer Aktiengesellschaft Printing plate fastening and tensioning assembly
AU602706B2 (en) * 1986-08-02 1990-10-25 Koenig & Bauer Aktiengesellschaft Printing plate fastening and tensioning assembly
US4907508A (en) * 1987-11-24 1990-03-13 Celfa Ag Printing cylinder with rubber coating for letterpress, flexography, rotogravure and rotary offset
JP2962523B2 (ja) 1991-11-15 1999-10-12 デイ・インターナショナル・インコーポレーテッド 狭いギャップロックアップ用の印刷ブランケット
EP0619780A4 (en) * 1991-11-15 1995-02-08 Day Int Corp PRINT CLAMP FOR CLAMPING DEVICE WITH NARROW CYLINDER PIT.
US5357863A (en) * 1991-11-15 1994-10-25 Day International, Inc. Printing blanket for use with a printing cylinder to achieve a narrow gap lock-up
US5570620A (en) * 1993-12-22 1996-11-05 Best Cutting Die Company Panel cutting apparatus
USRE38033E1 (en) 1993-12-22 2003-03-18 Best Cutting Die Company Panel cutting apparatus
US6532854B2 (en) 1994-01-21 2003-03-18 Best Cutting Die Company Cutting die clamping mechanism
US5505109A (en) * 1994-04-26 1996-04-09 Best Cutting Die Company Cutting die and chisel
US5697277A (en) * 1994-05-17 1997-12-16 Best Cutting Die Company Multi use rotary die plate system
US6032565A (en) * 1994-05-17 2000-03-07 Best Cutting Die Company Multi-use rotary die plate system
EP0719641A3 (de) * 1994-12-30 1997-03-05 Koenig & Bauer Albert Ag Gummituchzylinder für Offsetdruck
US5653169A (en) * 1994-12-30 1997-08-05 Koenig & Bauer-Albert Aktiengesellschaft Rubber blanket cylinder for offset printing
US6026725A (en) * 1995-04-10 2000-02-22 Best Cutting Die Company Panel cutting apparatus with waste repellant die structure
US6076444A (en) * 1997-08-01 2000-06-20 Best Cutting Die Company Panel cutting apparatus with selectable matrices for vacuum and air
US20030188649A1 (en) * 2002-04-09 2003-10-09 Phototype Engraving Company Flexible printing plate
US20050241503A1 (en) * 2004-04-30 2005-11-03 Eduard Hoffmann Transfer blanket, in particular rubber blanket, for a printing press
US7219604B2 (en) * 2004-04-30 2007-05-22 Man Roland Druckmaschinen Transfer blanket, in particular rubber blanket, for a printing press
US20060230961A1 (en) * 2005-04-14 2006-10-19 Man Roland Druckmaschinen Ag Ink transfer device for a printing press
US7568427B2 (en) 2005-04-14 2009-08-04 Man Roland Druckmaschinen Ag Ink transfer device for a printing press
US20070101884A1 (en) * 2005-11-09 2007-05-10 Czerner Richard L Printing blanket including a non-extensible backing layer and a relief area which may be mounted in a variety of lockup mechanisms
US8783178B2 (en) * 2005-11-09 2014-07-22 Day International, Inc. Printing blanket including a non-extensible backing layer and a relief area which may be mounted in a variety of lockup mechanisms
US9649835B2 (en) 2005-11-09 2017-05-16 Day International, Inc. Printing blanket including a non-extensible backing layer and a relief area which may be mounted in a variety of lockup mechanisms
US20070227379A1 (en) * 2006-04-03 2007-10-04 Komori Corporation Plate for magnet cylinder
US8720336B2 (en) * 2006-04-03 2014-05-13 Komori Corporation Plate for magnet cylinder
US20080217798A1 (en) * 2007-03-09 2008-09-11 Industrial Technology Research Institute Mold structure and the manufacturing method thereof
WO2017010970A1 (en) * 2015-07-10 2017-01-19 C.U.E., Inc. Cover for rotary die cutter anvil cylinder

Also Published As

Publication number Publication date
NL7202267A (enrdf_load_stackoverflow) 1972-09-07
CH543389A (fr) 1973-10-31
BE779605A (fr) 1972-06-16
FR2127709A5 (enrdf_load_stackoverflow) 1972-10-13
DE2204872A1 (de) 1972-09-21
IT949847B (it) 1973-06-11

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Legal Events

Date Code Title Description
AS Assignment

Owner name: W. R. GRACE & CO.-CONN., MASSACHUSETTS

Free format text: MERGER;ASSIGNORS:GRACE MERGER CORP. A CT CORP. (MERGED INTO);W. R. GRACE & CO. A CT. CORP.;REEL/FRAME:005206/0001

Effective date: 19880525