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Publication numberUS3814014 A
Publication typeGrant
Publication dateJun 4, 1974
Filing dateMay 4, 1972
Priority dateJun 17, 1968
Publication numberUS 3814014 A, US 3814014A, US-A-3814014, US3814014 A, US3814014A
InventorsDahlgren H
Original AssigneeDahlgren H
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Inker
US 3814014 A
Abstract
An inker for applying ink to a printing plate comprising a primary inker arranged to apply ink to a storage pad on the plate cylinder in combination with a secondary inker arranged to transfer ink from the storage pad to the printing plate. The storage pad is raised such that the primary inker engages same without contacting the printing plate.
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Description  (OCR text may contain errors)

United States Patent 1 91 Dahlgren June 4, 1974 [54] INKER 2,851,948 9/1958 Lucas 101/148 D' [76] inventor: Harold P. Dahlgren, 726 Regal 322 DallaS1TeX- 75247 3,467,008 9/1969 Domoter... 3,563,173 2/1971 Harless... [22] May 197.2 3,614,927 10/1971 .lurny 101/148 [21] Appl. No.: 250,449

Related U.S. Application Data [63] Continuation-impart of Ser. No. 737,521, June 17,

1968, Pat. N0. 3,664,261.

[52] U.S. Cl 101/137, 101/349, 101/157,

Primary Examiner--Robert E. Pulfrey Assistant ExaminerE. M. Coven Attorney, Agent, or Firm-Howard E. Moore; Gerald G. Crutsinger [57] ABSTRACT An inker for applying ink to'a printing plate comprising a primary inker arranged to apply ink to a storage pad on the plate cylinder in combination with a secondary inker arranged to transfer ink from the storage pad to the printing plate. The storage pad is raised such that the primary inker engages same without contacting the printing plate.

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sum V 15 ur 1a INKER cRoss REFERENCE TO RELATED APPLICATION This application is a continuation-in-part of my copending application Ser. No. 737,521, filed June 17, 1968, entitled STRAIGHT FEED PRESS, now US. Pat. No. 3,664,26lissued May 23, 1972.

BACKGROUND OF THE INVENTION No significant advances have been made presenting new concepts in sheet-feed printing systems for decades. Printing systems designed for the sheet-fed printer are basically the same and allow printing on one side of the sheet at a time, requiring sheets to be turned over and rerouted through the press for single or multicolor perfecting. Sheets are progressively and meticulously transferred in serpentine fashion about transfer and impression cylinders and hopefully registered from one cylinder to another andfrom one printing unit to another until finally they emerge as a printed product. Printing units must be synchronized for color register through numerous drive and idler gears and consequently presses are extremely complex, massive units which are very expensive to 'manufacturebecause of numerous transfer and printing cylinders and mechanisms related thereto.

' One or two color sheet-fed perfectors have been developed heretofore. However, these machines were specifically designed for specific jobs, such as mass production of paperback books, and are totally unsuitable for. high speed production of four-color process printing on both sides of the paper.

Heretofore no commerically successful sheet-fed press had the capability of printing on two sides of a sheet in as many as four colors by passing the paper through the press one time;

It is the common and accepted practice in the printing industry to run a sheet to be printed through the sheet'fed press a multiplicity of times to attain multicolor printing on two sides of a sheet. After each pass of the sheet through. the press, the plates must be changed and the press made ready for the next pass to apply other colors or to print on the back of thesheet.

It is readily apparent to those skilled in the printing art that a considerable amount of time is spent making sheet-fed presses ready to print and in attaining proper registry of the numerous components of the press.

In a typical four-color one-side printing press a sheet delivered from the feeder is caught by the gripper bars of a first transfer cylinder. The sheet is folded around I the transfer cylinder and carried to the grippers on the first impression cylinder where the grippers of the transfer cylinder release the paper and it is caught by the grippers of the impression cylinder. The grippers on the impression cylinder rotate the paper into contact with the blanket cylinder where printing is accomplished in one color on one side of the sheet. When the grippers on the impression cylinder release the sheet, grippers on a second transfer cylinder grasp the sheet, causing the printed surface to be in contact with the transfer cylinder while it is rotated to the grippers of a second impression cylinder. The grippers of the second transfer cylinder release the sheet as it is caught by the grippers of the second impression cylinder which rotates the sheet into contact with a second blanket where a second color is applied to the same side of the sheet. Grippers on a third transfer roller catch the sheet as it is released by the grippers of the second-impression cylinder and the printed surface is again brought into contact 'with the transfer cylinder while it is being delivered to the grippers of a third impression cylinder. This process is continued until the sheet passes to delivery. When one side of the sheet is completed, the press is replated, the sheets are turned and re-fed through the press to print the other side of the sheet.

Virtually all sheet-fed printing presses heretofore developed have the characteristic of feeding the sheet sepentine fashion through the press while the grippers associated with each cylinder catch the sheet as it is being released by the grippers of the previous cylinder.

One of the major problems encountered by the printing industry lies in synchronizing the various cylinders whereby the sheet will be grasped and released at the proper moment for maintaining connecting between the cylinders-of successive towers so-that colors do not overlap or separate.

Chains have been used in the past with limited success to transfer sheets from one printing station to another. However, grippers supportedby the chain were positively indexed to the printing station cylinders in an attempt to regain register which was periodically lost between printing stations.

A chain has inherent limitations as a smooth transfer media because chordal motion of the links limit smooth flow; linear deformation of the chain results from numerous pivot joints. Lubrication requirementsat joints, to help prevent wear, noise, shock and vibration, present maintenance problems.

The gripper and chain transfer media could not, by

itself, register the sheet between the printing stations, even with the chain travelling precisely at cylinder speeds. As a compromise, grippers had to be loosely supported on the chain, moved from normal position, and indexed to printing station cylinders priot to actual sheet transfer at the cylinder. As soon as sheet transfer was accomplished and the gripper became separated from index with the cylinder, the gripper jumped or jerked back into its normal relation withthe chain.

In the transfer system employed and disclosed herein,

there'is nocontact between tape directed gripper bars presses with a multiplicity of towers for applying morethan one color of ink to the sheet were driven by a common. drive through .a complex gear train or through long shafts which have inherent distortion thereby increasing the problem of synchronizing components of the press thereby making precision registry more difficult.

Typical four-color one-side printing presses have an average of about twenty cylinders including the plate cylinders, blanket cylinders, impression cylinders,

transfer cylinders and skeleton wheels.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US338666 *Mar 23, 1886 Chromatic-printing machine
US1654250 *Feb 17, 1927Dec 27, 1927Burroughes Evans ArthurInking mechanism of planographic rotary printing machines
US2366335 *May 24, 1941Jan 2, 1945Hoe & Co RPrinting machine
US2851948 *Feb 20, 1957Sep 16, 1958William Gegenheimer Co IncPlanographic dampening apparatus
US2911907 *Oct 28, 1955Nov 10, 1959Ward Davidson WilliamMulti-purpose rotary printing press
US3006275 *May 13, 1960Oct 31, 1961Inta Roto Machine Company IncMicrometer doctor bar assembly
US3467008 *Jan 31, 1967Sep 16, 1969Domotor Julius AMeans and method for removing foreign particles from lithographic press
US3563173 *Sep 19, 1969Feb 16, 1971Harris Intertype CorpLiquid-handling mechanism
US3614927 *Jun 30, 1969Oct 26, 1971Adamovske Strojirny NpMeans for adjusting the amount of damping liquid supplied to an offset printing machine
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4220081 *Feb 8, 1978Sep 2, 1980Deluxe Check Printers, Inc.Sheet feeding, registering and printing apparatus
US4369703 *Apr 6, 1981Jan 25, 1983Roberto JarachDevices for numeration, overprinting, perforation and cutting on Offset sheet printing machines
US4590856 *Nov 26, 1984May 27, 1986M.A.N.-Roland Druckmaschinen AktiengesellschaftLifter-type inker for rotary printing machine including rotational shock dampening means
US5119727 *Dec 18, 1990Jun 9, 1992Komori CorporationInking apparatus for printing press
US5134936 *Oct 26, 1990Aug 4, 1992Man Roland Druckmaschinen AgSet-up method for a printing system, and resulting printing system
US5193458 *Jun 23, 1992Mar 16, 1993Keller James JGripper bar conveyor for multiple color offset rotary printing press
US5289768 *Mar 15, 1993Mar 1, 1994Keller James JGripper bar conveyor for multiple color offset rotary printing press
US5336525 *Jan 21, 1993Aug 9, 1994Sheenya Enterprises Co., Ltd.Compressing porous padding member, diluting multicolor ink depressing die, adding ink, vacuum drying, removing die
US5477780 *Mar 1, 1994Dec 26, 1995Keller; James J.Horizontal sheet transfer multiple color offset rotary printing press with horizontal slide access
US5566614 *Oct 17, 1994Oct 22, 1996Heidelberger Druckmaschinen AgAdjusting device for a gripper opening cam in a chain delivery of a sheet-fed printing press
US5590598 *Dec 22, 1995Jan 7, 1997Keller; James J.Horizontal sheet transfer multiple color offset rotary printing press with horizontal slide access
US5794531 *Jan 7, 1997Aug 18, 1998Keller; James J.Multiple color offset rotary printing press with horizontal slide access
US5950537 *Jun 19, 1997Sep 14, 1999Man Roland Druckmaschinen AgFloat-mounted printing-group cylinder
US6647878 *Feb 5, 2001Nov 18, 2003Hauni Mashinenbau AgApparatus for applying printed matter to webs of wrapping material for smokers' products
US6910417 *Jul 19, 2004Jun 28, 2005Leonard Immanuel TafelInking arrangement improvement
WO1994000299A1 *Mar 12, 1993Jan 6, 1994James J KellerGripper conveyor for multiple color offset presses
Classifications
U.S. Classification101/137, 101/408, 101/157, 101/352.9
International ClassificationB41F31/30, B41F13/24, B41F21/00, B41F31/00, B41F21/08, B41F13/36
Cooperative ClassificationB41P2213/734, B41F21/08, B41F13/36, B41F31/301
European ClassificationB41F13/36, B41F31/30B, B41F21/08