US3195458A - Printing apparatus and method - Google Patents

Printing apparatus and method Download PDF

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Publication number
US3195458A
US3195458A US327711A US32771163A US3195458A US 3195458 A US3195458 A US 3195458A US 327711 A US327711 A US 327711A US 32771163 A US32771163 A US 32771163A US 3195458 A US3195458 A US 3195458A
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US
United States
Prior art keywords
recess
plate
printing
roll
clamping
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
US327711A
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English (en)
Inventor
Nystrand Ernst Daniel
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.)
Paper Converting Machine Co
Original Assignee
Paper Converting Machine Co
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 Paper Converting Machine Co filed Critical Paper Converting Machine Co
Priority to US327711A priority Critical patent/US3195458A/en
Priority to GB40034/64A priority patent/GB1010720A/en
Priority to DEP35220A priority patent/DE1263022B/de
Priority to SE14178/64A priority patent/SE300993B/xx
Application granted granted Critical
Publication of US3195458A publication Critical patent/US3195458A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1262—Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1293—Devices for filling up the cylinder gap; Devices for removing the filler

Definitions

  • Another object of the invention is to provide a novel combination of elements effectively utilizing such a flexible plate.
  • a further object of the invention is to provide a method for fastening of thin printing plates for rotary printing where the gap in printing between repeats is kept to a bare minimum.
  • Still another object of the invention is to provide a novel method of printing wherein the above-mentioned flexible plate is handled and used in a unique manner to provide superior printing.
  • the invention finds advantageous use in connection with high speed printing of office forms and like material. In such an environment, relatively short orders are common. Through the invention, quick and inexpensive replacement of the printing plates is facilitated, and this is especially important where the plate rolls are of relatively small diameter, i.e., carrying a single repeat of the order of 8"11".
  • FIG. 1 is a fragmentary elevational view of a press utilizing the invention
  • FIG. 2 is a fragmentary elevational view, partially in section, of the plate cylinder utilized in the invention
  • FIG. 3 is a fragmentary perspective view of the printing plate prior to the installation thereof on the plate cylinder of FIG. 2;
  • FIG. 4 is an enlarged fragmentary end elevational view taken along the line 4-4 of FIG. 2;
  • FIG. 5 is a fragmentary sectional view taken along the line 55 of FIG. 4;
  • FIG. 6 is a fragmentary sectional view taken along the line 6--6 of FIG. 5;
  • FIG. 7 is a fragmentary sectional view taken along the line 77 of FIG. 5;
  • FIG. 8 is a fragmentary detail sectional view through a part of the plate cylinder of FIG. 2 and showing the first step of application of the printing plate of FIG. 3 to the plate cylinder of FIG. 2;
  • FIG. 9 is a fragmentary sectional view of the plate cylinder showing a modified form of construction
  • FIG. 10 is a fragmentary perspective view of the end of one of the clamping bars employed in the plate cylinder.
  • FIG. 11 is a view similar to FIG. 10 but of the other clamping bar used in the plate cylinder.
  • P16. 12 is a fragmentary sectional view of a printing plate utilized in the invention.
  • FIG. 13 is a view similar to FIG. 12 but showing the printing plate with certain areas removed to leave upstanding cones.
  • the numeral 11 designates generally the frame for the press, which includes the usual side frames 11 and 12, suitably secured together by means of tie-rods 13, cross rods 14, etc, to provide a rigid structure.
  • the frame provides journals for the various printing rolls, also in conventional fashion.
  • the web W proceeds around an idler roll 15 and then in wrapping engagement with an impression cylinder or roll 16, preferably constructed of steel.
  • the web after having passed around, i.e., traveled with, the impression cylinder 16, is conducted to additional finishing stations (not shown) for perforating, folding, etc.
  • impressions or characters are transferred thereto from a blanket or transfer cylinder 17 which preferably is rubber-covered.
  • the impressions are derived from a plate cylinder 18 which, like the cylinders 16 and 17, is journaled in the frame 111. From this, it will be understood that this showing is of offset printing.
  • the frame is equipped with a fountain roll 19 against which a ductor blade 20 operates, in conventional fashion.
  • the ink from the fountain roll is transferred to the ductor roll 21 and thence to a longitudinally vibrating roll 22.
  • the roll 22 in turn transfers its ink to distributing rolls 23 and 24, and these in turn relay the ink to a second vibrating roll 25.
  • the ink is then transferred by means of form rollers 26 and 27 to the plate cylinder 18, more particularly, to the high point on the flexible plate covering, which can be better appreciated from a consideration of FIGS. 3, 12, and 13.
  • the printing plate is generally designated 28 and may include three layers of material.
  • the first layer (to be positioned in contact with the surface of the plate cylinder 18) is a supporting surface and is constructed of a flexible, water-impervious plastic material 29.
  • the outer layer 30 constitutes a water-soluble plastic material bonded to the inner layer 29 by means of a suitable adhesive binder 31.
  • the plastic layer 30 has the property of being soluble in water until it has been exposed to light.
  • FIG. 13 it is seen that there are certain areas as at 3011 which have been removed, leaving upstanding cones as at 3012. This is provided through the superposition of a negative or other light filter, wherein the light passing through the negative creates the cones 30b and upon subsequent washing with water, the areas 30a are dissolved.
  • a suitable printing plate is provided which normally has a thickness of the order of OBIS-0.017. It will be apparent, however that other printing plates such as brass-backed rubber plates may be advantage-ously employed in the practice of the invention.
  • the plate cylinder 18 which supports the flexible plate 28 is seen in FIG. 4 to include a longitudinally extending recess 32 having a dovetail configuration in transverse section.
  • first wall it will refer to the wall 34
  • second wall will refer to the wall 35.
  • first clamping member 36 Positioned within the longitudinally-extending recess 32 are two clamping members, a first clamping member 36 and a second clamping member 37 (see particularly FIG. 6).
  • the second clamping member 37 bears against the second wall 35 and is urged thereagainst not only by the first clamping member 36 but also by the springs 38 which extend between the secondcla-mping member 37 and'the first wall 34, as illustratedin FIG. 6..
  • first member 36 is urged against the second member 37 by means of another group of springs 39 which also bear against the first wall 34, as seen in FIG. 7.'
  • the v first clamping member 36 is providedwithbores as at 40 and 41.
  • the bores 44 are seen to extend through the vgenerally rectangular-shaped first clamping member36, while the bores 41 extend only partway through, as shown in FIGS. 6 and 7, respectively.
  • the foot-like portion 42 is a 30 projection', with the length of the foot being of the order of 7 A v 7
  • small diameter plate cylinders i.e., of
  • the first clamping member 36 is equipped with a' foot-like portion 42 which provides additional bearing between the first clamping member 36 and the base 32a of the recess 32.
  • the second clamping'member 37 is generally wedge or triangular-shaped intransverse section except for the portion 37a along one longitudinal corner being relieved to accommodate the footlike portion 42.
  • FIG. 3 where it is seen that theend portions of the plate 28 are folded the order of 8 /2 to 11 inches, and thus print a web with a single repeat, and a plate can be changed herein in about one minute.”
  • the use of the offset arrangement picturedin FIG. 1' gives superior printing and V with about one-half as much ink as the direct impression j technique normally employed.
  • a folded end portion defined by the end 43a and the transverse score line 44a is positioned be tween the second clamping element 37 and the second face 35, as appears in FIG. 8. Thereafter, the roll lit'is rotated in thedirection of thearrow in FIG. 8 and the 7 a clamping elements 36 and 27, respectively (see FIG. 7).
  • Both clamping elements 36 and 37 are equipped with end slots as at relative to element 36"(see FIG. 10-) 1 which permit its being pried against the urging of the springs 39 so as to permit insertion of the trailing end fold 43b.
  • the springs 38 urge the generally rectangular shaped first clamping member 36 against the end portion 43b and also againstthe second clamping member 37.
  • the foot-like portion 42 provides an advantageous additional bearing against the recess base 320' facilitating sliding movement of the member 36'so as to maintain the necessary clamping pressure.
  • first clamping mernb er 36 is generally a parallelepiped, including opposed angles
  • Lon gitudinal tion of anembodi-ment of the invention has been set down
  • the advantageous sliding movement of the members 36 and 37 maintains optimal pressure on the ends of the thin printing plate, minimizing distortions, and this slid- Ying movement be'enhanced through the use of molybdenum disulfa-te'tape'on the unde-rsides of the elongated rnembers 36 and 37.
  • FIG. 9 a modified form of construction is seen wherein the plate 28 is seen to have its tail portion 143 adhesively secured by means'of adhesive 149 to the upper surface of the clamping bar 36 wl1ich is carried by the plate cylinder 18.
  • a smallga-p G as designated in FIG. 9, occurs, and this is tolerable since in the printing provided by the'invention there are small spaces providedbetween adjacent repeats. It will be appreciated that with the plate mounting of the invention the gap-between printing repeats is kept to a bare minimum, occurring only at the apex ofthe clamping element 37'.
  • a a I is equipped with an integral foot portion in contacting relation with the base wall of said recess.
  • a printing plate cylinder comprising an elongated cylindrical roll having a longitudinally extending dovetail-like recess equipped with a bottom wall and sidewalls converging to provide a constricted peripheral opening and adapted to secure the ends of a flexible printing plate, first and second elongated clamping membersin said recess in side-by-side relation, and. springfmeans in said recess urging said members toward one of said walls, said spring means including two sets of springs positioned in 'member to urge saidsecond member against said one Wall,
  • saidfirst member being equipped with transverse openings .with said other set of springs extending therethrough.
  • the base of the dovef; tailed surface 320 is at a right angleto a center' line drawn from the middle of the surface 46 asinFIG. 8. ,Theoretically, the base 32;: ofithe dovetail and'the touching por -j tions of the elements 36 and 37 conform to an arc. of cur-' vature, the center. of Whichacorresponds to the'center of.
  • each member being .adapted to bear, against an end of a flexible printing plate, and slot'means atthe end of each member, for lever engagement to oversaid impression roll, a plate roll journaled in said frame for delivering ink impressions to said transfer roll, and roll means in said frame for delivering ink to said plate roll and for pressing the surface of said plate roll, said plate roll comprising a roll having a longitudinally-extending dovetail recess in the periphery thereof, a first elongated member in said recess and having generally a rectangular shape in transverse section, a second elongated member in said recess and having generally a wedge shape in transverse section, a first plurality of springs in said recess urging said first member against said second member and away from one of said dovetail walls, a second plurality of springs in said recess urging said second member against the other dovetail wall and away from said one dovetail wall
  • a printing plate cylinder comprising a roll having a longitudinally-extending, dovetail recess in the periphery 30 thereof equipped with a bottom wall and side walls converging to provide a constricted peripheral opening and adapted to secure the ends of a flexible printing plate, a
  • first elongated member in said recess and having a generally rectangnlar shape in transverse section a second elongated member in said recess and having a generally triangular shape in transverse section, said second member being in confronting relation with one of said side Walls and said first member being in confronting relation with the other of said side walls, transverse passage means in said first member and spring means in said passage means extending beti een said second member and said other Wall, and additional spring means separate from the firstmentioned spring means interposed between said other wall and said first member whereby said members are independently manipulable to secure in independent fashion the said flexible printing plate ends.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
US327711A 1963-12-03 1963-12-03 Printing apparatus and method Expired - Lifetime US3195458A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US327711A US3195458A (en) 1963-12-03 1963-12-03 Printing apparatus and method
GB40034/64A GB1010720A (en) 1963-12-03 1964-10-01 Improvements in printing apparatus
DEP35220A DE1263022B (de) 1963-12-03 1964-10-03 Einrichtung zum Befestigen einer biegsamen Druckplatte am Plattenzylinder einer Druckmaschine
SE14178/64A SE300993B (de) 1963-12-03 1964-11-24

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US327711A US3195458A (en) 1963-12-03 1963-12-03 Printing apparatus and method

Publications (1)

Publication Number Publication Date
US3195458A true US3195458A (en) 1965-07-20

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US327711A Expired - Lifetime US3195458A (en) 1963-12-03 1963-12-03 Printing apparatus and method

Country Status (4)

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US (1) US3195458A (de)
DE (1) DE1263022B (de)
GB (1) GB1010720A (de)
SE (1) SE300993B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509819A (en) * 1967-04-03 1970-05-05 Richard C Conole Printing roll with printing plate securing means
US3858511A (en) * 1973-02-27 1975-01-07 Hercules Inc Flexible plate saddle lock-up system
FR2540433A1 (fr) * 1983-02-09 1984-08-10 Polygraph Leipzig Dispositif
US5704289A (en) * 1994-08-06 1998-01-06 Koenig & Bauer-Albert Aktiengesellschaft Flexible beveled edge plate fastening device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3401760A1 (de) * 1984-01-19 1985-08-01 Albert-Frankenthal Ag, 6710 Frankenthal Vorrichtung zum spannen von druckplatten
DE4319167C2 (de) * 1993-06-09 1995-04-27 Roland Man Druckmasch Vorrichtung zum Befestigen einer biegsamen Druckplatte
DE19602102A1 (de) * 1996-01-22 1997-07-24 Heidelberger Druckmasch Ag Vorrichtung zum Aufbringen eines Drucktuches auf einen Gummituchzylinder einer Rotationsdruckmaschine

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1602365A (en) * 1921-01-04 1926-10-05 William A Lorenz Abrasive paper
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
US2154757A (en) * 1935-01-19 1939-04-18 Int Paper Box Machine Co Printing mechanism
US2375603A (en) * 1941-12-26 1945-05-08 Moore Business Forms Inc Cylinder for printing presses
GB666356A (en) * 1949-08-10 1952-02-13 Teodoro Grunberg Improvements in or relating to rotary press cylinders carrying engraved sheets
US2791504A (en) * 1951-08-20 1957-05-07 Du Pont Photopolymerizable elements
US2797638A (en) * 1952-12-31 1957-07-02 Richard A Miller Duplicating machine feed tray
US2893868A (en) * 1955-08-22 1959-07-07 Du Pont Polymerizable compositions
GB910712A (en) * 1959-08-27 1962-11-14 Ernest Arthur Timson Improvements relating to printing cylinders

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE533694C (de) * 1930-08-17 1931-09-17 Johannisberg G M B H Maschf Vorrichtung zum Aufspannen von biegsamen Druckplatten auf dem Formzylinder von Tiefdruckmaschinen
DE541478C (de) * 1930-12-30 1932-01-09 Johannisberg G M B H Maschf Vorrichtung zum Aufspannen von biegsamen Druckplatten auf dem Formzylinder von Tiefdruckmaschinen
US2186764A (en) * 1938-03-29 1940-01-09 Meisel Press Mfg Company Printing cylinder
CH281458A (fr) * 1949-08-19 1952-03-15 Mitchell S Import S R L Cylindre de presse à imprimer.

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1602365A (en) * 1921-01-04 1926-10-05 William A Lorenz Abrasive paper
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
US2154757A (en) * 1935-01-19 1939-04-18 Int Paper Box Machine Co Printing mechanism
US2375603A (en) * 1941-12-26 1945-05-08 Moore Business Forms Inc Cylinder for printing presses
GB666356A (en) * 1949-08-10 1952-02-13 Teodoro Grunberg Improvements in or relating to rotary press cylinders carrying engraved sheets
US2791504A (en) * 1951-08-20 1957-05-07 Du Pont Photopolymerizable elements
US2797638A (en) * 1952-12-31 1957-07-02 Richard A Miller Duplicating machine feed tray
US2893868A (en) * 1955-08-22 1959-07-07 Du Pont Polymerizable compositions
GB910712A (en) * 1959-08-27 1962-11-14 Ernest Arthur Timson Improvements relating to printing cylinders

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509819A (en) * 1967-04-03 1970-05-05 Richard C Conole Printing roll with printing plate securing means
US3858511A (en) * 1973-02-27 1975-01-07 Hercules Inc Flexible plate saddle lock-up system
FR2540433A1 (fr) * 1983-02-09 1984-08-10 Polygraph Leipzig Dispositif
US5704289A (en) * 1994-08-06 1998-01-06 Koenig & Bauer-Albert Aktiengesellschaft Flexible beveled edge plate fastening device

Also Published As

Publication number Publication date
DE1263022B (de) 1968-03-14
GB1010720A (en) 1965-11-24
SE300993B (de) 1968-05-20

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