US2740355A - Apron blanket for multicolor printing presses - Google Patents

Apron blanket for multicolor printing presses Download PDF

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Publication number
US2740355A
US2740355A US361295A US36129553A US2740355A US 2740355 A US2740355 A US 2740355A US 361295 A US361295 A US 361295A US 36129553 A US36129553 A US 36129553A US 2740355 A US2740355 A US 2740355A
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sheet
cylinder
apron
printing
printed
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US361295A
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Harry E Wimpfheimer
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F22/00—Means preventing smudging of machine parts or printed articles

Definitions

  • This invention relates generally to multicolor printing presses and, more particularly, to a new and useful improvement in an apron for use on a transfer cylinder to prevent injury to the printed matter on a printed sheet passing over the cylinder.
  • a sheet or cardboard to be printed upon is transferred from a printing cylinder of one color ink to another printing cylinder of a different color ink by a transfer cylinder contiguous to both printing cylinders. It is absolutely necessary that the partially and freshly printed surface of the sheet or carboard being run does not touch the bare surface of any of said cylinders otherwise the printed matter will become smeared, smudged, wiped, marked, blurred or otherwise injured.
  • the grain is distributed in a haphazard fashion so that the flat sides of the abrasive grain are found on the rough surface in a large proportion of the granules instead of the sharper points.
  • Another object of the invention is to provide an apron for a printing press transfer cylinder which is adapted to contact directly and to support the printed sheet or cardboard off of the surface of the cylinder.
  • a further object of the invention is to provide an apron for a printing press transfer cylinder which is capable of being made in various sizes to fit various sizes of conventional cylinders and which is adapted to be readily mounted on the cylinder.
  • Fig. 1 is a transverse sectional view through the contigu- 2,740,355 Patented Apr. 3, 1956 ous cylinders of a multicolor printing press embodying the invention.
  • Fig. 2 is a perspective view of the transfer cylinder.
  • Fig. 3 is a plan view of a metal sheet from which the apron embodying the invention is formed.
  • Fig. 4 is a perspective view 'ofthe improved apron.
  • Fig. 1 horizontally arranged contiguous cylinders are used in a multicolor printing press as shown, an end or first printing cylinder 10 mounted on a shaft indicated at 11, another end or second printing cylinder 12 mounted on a shaft 13 and an intermediate transfer cylinder 14 on shaft 15.
  • the transfer cylinder 14 is arranged to transfer a sheet of paper 16 which is to be printed from the first printing cylinder 19, which prints in one color on the sheet, to the second printing cylinder 12 which prints in a different color. In color work, it is absolutely necessary that the printed matter on the sheet 16 does not touch the bare surface of the transfer cylinder.
  • apron 17 of novel construction is placed directly on the surface of the transfer cylinder 14.
  • the apron 17 is formed of a thin sheet of metal 18 punched through its surface area with holes 19, equally distributed thereover, leaving the sharp edges Ztl of the holes projecting from one surface of the metal sheet.
  • the punched sheet of metal is wrapped around the entire surface of the cylinder, with the projections 20 outermost.
  • the long edges of the punched sheet are fastened to the cylinder by the sheet supporting screws 21 along the edges 22 of the slot 23 which provides the clearance for the paper grippers 24 so that the apron is uniformly supported and the stresses in printing evenly distributed over the entire surface of the apron.
  • the sheet of paper 16 is carried by the grippers 25 around the first printing cylinder 10 where it is partially printed with an ink of a certain color.
  • the sheet then passes between said cylinder 10 and the transfer cylinder 14, the latter cylinder transferring it by means of the grippers 24 to the second cylinder 12 where it is carried around by the grippers 26 and is further printed in a different color.
  • the side of the sheet which was printed upon is supported on a large number of projections 20 which project from the surface of the apron on said cylinder.
  • the projections support the sheet off of the surface of the cylinder and apron and prevent the freshly printed surface of the side of the sheet from slipping and therefore tend to prevent the smearing and blurring which is likely to occur.
  • the projections furthermore provide considerable storage space for ink which becomes detached from the freshly printed surface of the sheet and runs down the sides of the projections.
  • the apron can therefore be used for a comparatively long time before cleaning is necessary.
  • a printing press In a printing press, the combination of a first printing cylinder for printing one face of a sheet in colored ink, a second cylinder spaced from said first cylinder for printing said face with a different colored ink, a transfer cylinder operatively interposed in the space between and contiguous said first and second printing cylinders, sheet grippers on said transfer cylinder for transferring the printing sheet from the first to the second printing cylinder, and a split metal tubular sheet snugly wrapped around the outer surface of the transfer cylinder with its split edges secured thereto, said tubular sheet constituting an apron, said tubular sheet being formed with a plurality of holes promiscuously formed therein in staggered rela- 5 tion upon the entire area of said sheet, the material around said holes projecting outwardly of the outer surface of the tubular sheet for supporting the printed sheet in spaced relation to the surface of said transfer cylinder during its transfer from the first to the second printing cylinders.

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  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Description

Ap 3, 1956 H. E. WlMPFHElMER 2,740,355
APRON BLANKET FOR MULTICOLOR PRINTING PRESSES Filed June 12, 1955 INVENTOR. HARRY E. WIMPFHEIMER AI'I'UENE) nited States 2,740,355 APRON BLANKET FOR MoL'rrcoLon PRINTING PRESSES Harry E. Wimpflieimer, Lanrelton, N. Y.
Application June 12, 1953, Serial No. 361,295
1 Claim. (ill. 101-420) This invention relates generally to multicolor printing presses and, more particularly, to a new and useful improvement in an apron for use on a transfer cylinder to prevent injury to the printed matter on a printed sheet passing over the cylinder.
In multicolor printing, a sheet or cardboard to be printed upon is transferred from a printing cylinder of one color ink to another printing cylinder of a different color ink by a transfer cylinder contiguous to both printing cylinders. It is absolutely necessary that the partially and freshly printed surface of the sheet or carboard being run does not touch the bare surface of any of said cylinders otherwise the printed matter will become smeared, smudged, wiped, marked, blurred or otherwise injured.
Heretofore in order to prevent the printed matter on a freshly printed sheet of paper or cardboard from touching the bare surface of a cylinder of a multicolor printing press, it has been the practice to cover the surface of the cylinder with a cloth or paper sheet coated with garnet crystals or with granular particles. This is objectionable as the crystals and particles gradually become separated or break away from the cloth or paper sheet and fall into the bed of the press and finally reach the surface of the paper to be printed causing the half-tone plates to become speckled.
Furthermore, in ordinary granularly coated paper, the grain is distributed in a haphazard fashion so that the flat sides of the abrasive grain are found on the rough surface in a large proportion of the granules instead of the sharper points.
It is the principal object of the present invention to eliminate such objections and disadvantages by providing an apron for a transfer cylinder which effectively prevents the printed matter on a printed sheet or cardboard from touching the bare surface of the transfer cylinder, thereby preventing smearing, blurring or other injury to the printed matter.
Another object of the invention is to provide an apron for a printing press transfer cylinder which is adapted to contact directly and to support the printed sheet or cardboard off of the surface of the cylinder.
A further object of the invention is to provide an apron for a printing press transfer cylinder which is capable of being made in various sizes to fit various sizes of conventional cylinders and which is adapted to be readily mounted on the cylinder.
It is further proposed to produce an apron for a multicolor printing press transfer cylinder which is simple and durable in construction and which can be manufactured and sold at a reasonable cost.
For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appened claim in which the various novel features of the invention are more particularly set forth.
In the accompanying drawings forming a material part of this disclosure:
Fig. 1 is a transverse sectional view through the contigu- 2,740,355 Patented Apr. 3, 1956 ous cylinders of a multicolor printing press embodying the invention. g
Fig. 2 is a perspective view of the transfer cylinder.
Fig. 3 is a plan view of a metal sheet from which the apron embodying the invention is formed.
Fig. 4 is a perspective view 'ofthe improved apron.
Referring in detail to the drawings, in Fig. 1 horizontally arranged contiguous cylinders are used in a multicolor printing press as shown, an end or first printing cylinder 10 mounted on a shaft indicated at 11, another end or second printing cylinder 12 mounted on a shaft 13 and an intermediate transfer cylinder 14 on shaft 15. The transfer cylinder 14 is arranged to transfer a sheet of paper 16 which is to be printed from the first printing cylinder 19, which prints in one color on the sheet, to the second printing cylinder 12 which prints in a different color. In color work, it is absolutely necessary that the printed matter on the sheet 16 does not touch the bare surface of the transfer cylinder.
According to the present invention, this is accomplished by placing an apron 17 of novel construction directly on the surface of the transfer cylinder 14. The apron 17 is formed of a thin sheet of metal 18 punched through its surface area with holes 19, equally distributed thereover, leaving the sharp edges Ztl of the holes projecting from one surface of the metal sheet. The punched sheet of metal is wrapped around the entire surface of the cylinder, with the projections 20 outermost. The long edges of the punched sheet are fastened to the cylinder by the sheet supporting screws 21 along the edges 22 of the slot 23 which provides the clearance for the paper grippers 24 so that the apron is uniformly supported and the stresses in printing evenly distributed over the entire surface of the apron.
In the process of printing, the sheet of paper 16 is carried by the grippers 25 around the first printing cylinder 10 where it is partially printed with an ink of a certain color. The sheet then passes between said cylinder 10 and the transfer cylinder 14, the latter cylinder transferring it by means of the grippers 24 to the second cylinder 12 where it is carried around by the grippers 26 and is further printed in a different color. During this printing process and travel of the sheet over the transfer cylinder 14, the side of the sheet which was printed upon is supported on a large number of projections 20 which project from the surface of the apron on said cylinder. The projections support the sheet off of the surface of the cylinder and apron and prevent the freshly printed surface of the side of the sheet from slipping and therefore tend to prevent the smearing and blurring which is likely to occur. The projections furthermore provide considerable storage space for ink which becomes detached from the freshly printed surface of the sheet and runs down the sides of the projections. The apron can therefore be used for a comparatively long time before cleaning is necessary.
While I have illustrated and described the preferred embodiment of my invention, it is to be understood that I do not limit myself to the precise construction herein disclosed and the right is reserved to all changes and modifications coming within the scope of the invention as defined in the appended claim.
Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patcut is:
In a printing press, the combination of a first printing cylinder for printing one face of a sheet in colored ink, a second cylinder spaced from said first cylinder for printing said face with a different colored ink, a transfer cylinder operatively interposed in the space between and contiguous said first and second printing cylinders, sheet grippers on said transfer cylinder for transferring the printing sheet from the first to the second printing cylinder, and a split metal tubular sheet snugly wrapped around the outer surface of the transfer cylinder with its split edges secured thereto, said tubular sheet constituting an apron, said tubular sheet being formed with a plurality of holes promiscuously formed therein in staggered rela- 5 tion upon the entire area of said sheet, the material around said holes projecting outwardly of the outer surface of the tubular sheet for supporting the printed sheet in spaced relation to the surface of said transfer cylinder during its transfer from the first to the second printing cylinders. 10
UNITED STATES PATENTS Tucker July 5, 1887 Kendrick Sept. 20, 1904 Miehle Feb. 25, 1919 Henrichon Oct. 13, 1925 Spence June 26, 1928 Knowlton Oct. 15, 1929 Howe Jan. 13, 1931 Melton et a1. Aug. 13, 1935
US361295A 1953-06-12 1953-06-12 Apron blanket for multicolor printing presses Expired - Lifetime US2740355A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2965027A (en) * 1957-08-09 1960-12-20 Robert L Woodward Skeleton wheels
US3126826A (en) * 1964-03-31 Transfer cylinder for rotary multi-color printing presses
US3642274A (en) * 1970-08-07 1972-02-15 Francis Walter Herrington Sheet-supporting assembly for an inverter roll
US4190245A (en) * 1976-10-28 1980-02-26 Roland Offsetmaschinenfabrik Faber & Schleicher Ag De-curling device for printing presses
US4694750A (en) * 1985-11-21 1987-09-22 Greene Joe A Printing press cylinder with axially adjustable cord anti-smear devices
US5042383A (en) * 1974-09-27 1991-08-27 Heidelberger Druckmaschinen Ag Impression cylinder with domelike surface portions of uniform height
US5291224A (en) * 1989-10-27 1994-03-01 Canon Kabushiki Kaisha Sheet feeding apparatus using pairs of spur rollers
US6811863B2 (en) 2001-07-20 2004-11-02 Brite Ideas, Inc. Anti-marking coverings for printing presses
DE102011009651A1 (en) * 2011-01-27 2012-08-02 Manroland Ag Guide roll for rotary printing machine, has outer periphery that defines functional surface having several radially outwardly projecting protrusions spaced apart around outer periphery without interrupting course of functional surface
WO2013020790A1 (en) 2011-08-09 2013-02-14 Koenig & Bauer Aktiengesellschaft Printing press

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US365952A (en) * 1887-07-05 Pcters
US770293A (en) * 1903-07-08 1904-09-20 Livermore & Knight Company Embossed paper.
US1295558A (en) * 1917-02-03 1919-02-25 Robert Miehle Printing-press.
US1557282A (en) * 1923-06-01 1925-10-13 Alphonse J Henrichon Cloth making
US1675000A (en) * 1925-12-14 1928-06-26 Linotype Machinery Ltd Sheet-transferring cylinder of printing machines
US1731467A (en) * 1927-02-26 1929-10-15 Theodore E Knowlton Method and apparatus for preventing offset in printing
US1789273A (en) * 1929-11-04 1931-01-13 Stanley Works Process of ornamenting strip metal
US2011181A (en) * 1932-12-14 1935-08-13 Carborundum Co Method for preventing offset in printing

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US365952A (en) * 1887-07-05 Pcters
US770293A (en) * 1903-07-08 1904-09-20 Livermore & Knight Company Embossed paper.
US1295558A (en) * 1917-02-03 1919-02-25 Robert Miehle Printing-press.
US1557282A (en) * 1923-06-01 1925-10-13 Alphonse J Henrichon Cloth making
US1675000A (en) * 1925-12-14 1928-06-26 Linotype Machinery Ltd Sheet-transferring cylinder of printing machines
US1731467A (en) * 1927-02-26 1929-10-15 Theodore E Knowlton Method and apparatus for preventing offset in printing
US1789273A (en) * 1929-11-04 1931-01-13 Stanley Works Process of ornamenting strip metal
US2011181A (en) * 1932-12-14 1935-08-13 Carborundum Co Method for preventing offset in printing

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126826A (en) * 1964-03-31 Transfer cylinder for rotary multi-color printing presses
US2965027A (en) * 1957-08-09 1960-12-20 Robert L Woodward Skeleton wheels
US3642274A (en) * 1970-08-07 1972-02-15 Francis Walter Herrington Sheet-supporting assembly for an inverter roll
US5042383A (en) * 1974-09-27 1991-08-27 Heidelberger Druckmaschinen Ag Impression cylinder with domelike surface portions of uniform height
US4190245A (en) * 1976-10-28 1980-02-26 Roland Offsetmaschinenfabrik Faber & Schleicher Ag De-curling device for printing presses
US4694750A (en) * 1985-11-21 1987-09-22 Greene Joe A Printing press cylinder with axially adjustable cord anti-smear devices
US5291224A (en) * 1989-10-27 1994-03-01 Canon Kabushiki Kaisha Sheet feeding apparatus using pairs of spur rollers
US5636929A (en) * 1989-10-27 1997-06-10 Canon Kabushiki Kaisha Sheet feeding apparatus having multiple rotary members and cleaning members
US6811863B2 (en) 2001-07-20 2004-11-02 Brite Ideas, Inc. Anti-marking coverings for printing presses
US20050106968A1 (en) * 2001-07-20 2005-05-19 Brite Ideas, Inc. Anti-marking coverings for printing presses
US7270873B2 (en) 2001-07-20 2007-09-18 Brite Ideas, Inc. Anti-marking coverings for printing presses
US20080026201A1 (en) * 2001-07-20 2008-01-31 Printguard, Inc. Anti-marking coverings for printing presses
US8381647B2 (en) 2001-07-20 2013-02-26 Printguard, Inc. Anti-marking coverings for printing presses
US9868277B2 (en) 2001-07-20 2018-01-16 Printguard, Inc. Anti-marking coverings for printing presses
DE102011009651A1 (en) * 2011-01-27 2012-08-02 Manroland Ag Guide roll for rotary printing machine, has outer periphery that defines functional surface having several radially outwardly projecting protrusions spaced apart around outer periphery without interrupting course of functional surface
WO2013020790A1 (en) 2011-08-09 2013-02-14 Koenig & Bauer Aktiengesellschaft Printing press
DE102011080650A1 (en) * 2011-08-09 2013-02-14 Koenig & Bauer Aktiengesellschaft Rotary press

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