US3552317A - Method of actuating a master and printing therefrom while on a printing drum - Google Patents

Method of actuating a master and printing therefrom while on a printing drum Download PDF

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Publication number
US3552317A
US3552317A US619495A US3552317DA US3552317A US 3552317 A US3552317 A US 3552317A US 619495 A US619495 A US 619495A US 3552317D A US3552317D A US 3552317DA US 3552317 A US3552317 A US 3552317A
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Prior art keywords
master
sheet
coating
printing drum
radiation
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Expired - Lifetime
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US619495A
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English (en)
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Gerhard Ritzerfeld
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
    • B41M5/04—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet using solvent-soluble dyestuffs on the master sheets, e.g. alcohol-soluble
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L9/00—Apparatus for indirectly duplicating from hectographic originals by means of hectographic intermediaries or transfer surfaces, i.e. "dry duplicators"
    • B41L9/10—Apparatus for indirectly duplicating from hectographic originals by means of hectographic intermediaries or transfer surfaces, i.e. "dry duplicators" with rotary cylinders carrying sheets of hectographic gelatin-paper
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/02—Exposure apparatus for contact printing
    • G03B27/14—Details
    • G03B27/30—Details adapted to be combined with processing apparatus
    • G03B27/306—Heat development

Definitions

  • hectographic masters with duplicating ink brings about soiling of the fingers of the typist making the master and of the machine operator during the duplication and and during the regeneration of the master. Also, the use of hectographic masters in high speed printers in modern data processing machines causes difficulties due to the soiling of the high speed printer and of the person operating the same. It has been recently suggested to use for writing or printing of masters soot containing inks which do not contain a hectographic dye.
  • Another object of the invention is to provide a method for making or regenerating a hectographic'duplicating master in a short time, and by using the duplicating machine.
  • the present invention is concemed with the activation of a master whose text is radiation to the text.
  • the radiation absorbing text'of the master is covered with a dye coating adapted to be transferred to copy sheets moistened with alcohol.
  • the dye used in the coating is preferably a triphenylmethane dye embedded in a bonding'substance, and the radiation is preferably either infrared radiation, or high frequency waves producing sufficient energy to melt the dye coating only where the radiation is absorbed by the text of the master which is in contact with the dye coating.
  • the coated sheet is either manually or mechanically pulled off the master.
  • the coated sheet is a band-shaped web which is taken off a first reel and wound up on a second reel.
  • the section between the reels is pressed against the master and irradiated.
  • the wind-up reel is driven from the rotary carrier of the master through a friction roller so that the web is moved substantially in synchronism with the revolving master.
  • the coated sheet is superimposed on the master, and both sheets are held tight on the periphery of the carrier or duplicating drum.
  • FIG. 1 is a fragmentary sectional view illustrating a duplicating machine provided with the apparatus of the invention in a position of rest;
  • FIG. 2 is a fragmentary sectional view of the apparatus illustrating another operational position at the start of the transfer of dye to the master;
  • FIG. 3 is a fragmentary sectional view illustrating the apparatus in another operational position shortly before removal of the coated sheet from the master;
  • FIG. 4 is a fragmentary sectional view illustrating an operational position of the master in which the coated sheet is pulled off the master;
  • FIG. 5 is a fragmentary sectional view illustrating a modified construction of the pressure means in a position of rest of the duplicating machine, parts illustrated in FIGS. 1 to 4 being omitted in FIG. 5 for the sake of simplicity;
  • FIG. 6 is a fragmentary sectional view taken on lines D-E in FIG. 3; 7
  • FIG. 7 is a fragmentary sectional view illustrating another embodiment of the invention with a detachable unit which can be used in an existent duplicating machine;
  • FIG. 8 is a fragmentary sectional view illustrating a duplicating machine provided with the unit shown in FIG. 7, wherein the pressure means are modified;
  • FIG. 9 is a fragmentary sectional view taken on lines I-H in FIG. 7.
  • a duplicating drum 1 is mounted on a rotary shaft 2 and has a i first holding means for clamping a master 4 to the periphery of drum 1.
  • the master has on its outside a carbon mirror script text 6, and on its inside a positive legible outline 5 of the text.
  • a sheet 9 has an inner coating 10 consisting of a dye such as a triphenylmethane dye in a bonding base, and is held in a second holding means 7. In the operational position of FIG. 1, the apparatus is in a position of rest, but when rotation of the duplicating drum 1 is started, the coated sheet 9, 10 is superimposed on the outside of master 4.
  • a manually operable rod 11 has a cutout 14 which can be hooked onto a corresponding arresting part of a bracket 15 by which rod 11 is guided.
  • lever 16 turns about pivot 17 in the direction of the arrow A, and shifts, while lever 18 turns about pivot 19, link 20 in the direction of the arrow B.
  • Toggle levers 21 and 22 are displaced along the path defined by lever arm 23 turning about pivot 19 so that the support 24 with pressure rollers 12 and 13 and the source of radiation 25, move away from duplicating drum 1 and assume an inoperative position,
  • Parts 126 to 135 constitute a l-revolution clutch effecting stopping of duplicating drum 1 after a-singlerevolution.
  • a motor drives through a gear. 126, the gear- 127 which is freely rotatableon shaft 2 and fixedly connected with a ratchet wheel l29an'd a'flange 142.
  • latch 132 is held 1 by spring 134 in the position of FIG. 1', a pawlv130 is arrested and cannot turn about its pivot 135 under theactionof spring 131 toa position engaging the ratchet wheel and coupling the same through pivot l35gto the duplicating drum 1 so that the same is arrested in the position of FIG. 1.
  • duplicating drum is part of a' conventional duplicating machine which includes a counter pressure roller'la, a pair.
  • the duplicatingdrum has turned so-far-that the pressure roller 13 engages'theout- 1 side of 'the coated sheet 9 and presses the same with the ink coating .10 againstrthe carbon text .6 of the master-which has radiation absorbing properties.
  • Counter pressure roller in also holds the coatedsheet '10 superimposed on 'themaster.
  • the source of radiation 25, which mayproduce infrared radiation .or a highfrequency radiation, irradiates the leading-portions of the coated sheet 9 and of the master 4 in theposition-of 'FIG. 2, sincetsupport 24 is held in its operative position by the lever system due to the'fact that rod 11 is in its operative position.
  • the ap- ,paratus .assumes the position of FIG. 3' so that consecutive pairs of sections of the coated sheet and of the master 4 are irradiated.ln the position of FIG. 4, the superimposed sheets "havepassed beyond'the pressure roller means 12, 13, and the duplicating drum approaches its-position of rest in which pawl 13.0twill engage latch 132 and separate the driven ratchet 'Referring again to FIG. 2, it is not necessary toenergize the source of radiation when the duplicating drum is in the positions of FIG. 1 or'FlG. 4, in which the coated sheet and master are not located in the region of the source ofradiation 25.
  • a part circular member 76a is secured to the end face of drum 1 and .is engagedby slide contactl76 which is connected witha switch 75 in the circuit,.not shown, of the radiation source 25.
  • Radiation source .-25' is only ener gized when slide contact 76 is engaged by the part circular .inember 76a. which is disposed to close the circuit of the radiation source shortly before the same is passed by the leading edges of sheets 9 and 4, and to open the same shortly after the trailing edges of the sheet have passed the radiation source,
  • the circuit of the radiation source is closed such a time before the leading ,parts of the superimposed sheets 9 and 4 reach the region 'of radiation source 25, that the same has warmed -up and is fully heated when acting on the superimposed sheets.
  • the pressure rollers 12 and 13 smooth sheets 4 and 9 and hold the same in contact with each other and with the periphery of the duplicating drum.
  • the carbon text 6 on master 4 is irradiated through the dye coating 10 of sheet.9 and is heated so that the portions of the dye coating abutting the heat absorbing carbon text are heated to such a tempera- Y ture as to melt and adhere to the heat absorbing carbon text of the master sheet, while the remainder of the dye coating, which did not receive a heat reflex from the carbon text remains attached to sheet 9.
  • FIGSJ3 and 6 showth'e apparatusin axpositionin-which the source ofi radiation-is :passedbysections of the superimposed sheets. to-successively irradiate the entire- 'coatedl sheet "and master sheet.
  • Cam-32 is connected with a manually; operable.rod 99, and can be turned by-the sameto an inoperative .zposition spaced from roller 27 so that ejector 26 is notactuated duringa-duplicating operation. g After ejector 26 has-,perfomied its function, cam follower roller 97-is movedbyzthe duplicating drum beyond cam 95, so
  • Cam.37 hassuch-a shape 'that the gripper is open until the leadingedge of thecoated sheet 9is moved by the duplicating drum between the two jaws of gripper 33.-Thereupon,'a "higher portion of 'cam 37 engages cam follower'roller38 andc'loses'the gripper so that the leading edge of the coated sheet 9is clamped,iasshown in FIG. -4.
  • roller.27 moves beyond .cam32 and permits the-return'of-lever arm 28 by aspring'to its original'position in which ejectors.26 are retractedinto the interior-of theduplicating drum whose peripheral wallhas cutoutsfor the'passage'of ejectors 26.
  • gripper 33 gradually. pulls the coated-sheet'9off master 4 which'continues to move with the duplicating drum l. Since the coat 10 adheres to the master,
  • the coated sheet 9 forms a loop.
  • the portion of coating 10 ad- When the coated sheet 9 is completely separated from.
  • roller 38 is moved by the action of spring 36 tothe lower portion of cam 37, and the gripper opens and relases the coated sheet 9, which is either manually removed from the machine or guided into a receptacle, not shown.
  • Cam 37 is mounted on shaft 42shiftable in axral direction to" an inoperative position spaced from cam follower roller-38 of gripper 33 so that duplicating operations can'be carried out without operation of gripper33.
  • 1 v- FIG. 5 corresponds to FIGS. 1 and 6 as far as the duplicating machine, the gripper, the ejector, and the second holding means 3 and 7 are concerned, but the radiation and pressure unit is modified.
  • the source of radiation 25 is mounted on a support 45 which is operated from a manually operable rod 14.
  • the source of radiation is located within a glass cylinder 44 covered with a soft transparent layer 43.
  • the tubular member 44, 43 abuts the peripheral surface of the duplicating drum 1, and the superimposed sheets 9 and 4 along a first line.
  • tubular member 43, 44 Two spaced lines of the tubular member 43, 44 are engaged by a pair of rollers 46, 47 mounted on support 45. Consequently, the tubular transparent member 43', 44 is rotatably supported at three points, and rotates due to the frictional engagement with the peripheral surface of the duplicating drum 1 or with sheet 9.
  • the pressure of the tubular member 43, 44 on the superimposed sheets smoothes the same and holds the dye coating in contact with the heat absorbing carbon text on the outside of master 4.
  • the pressure rollers used in the embodiment of FIG. 1 are replaced by the transparent tubular pressure tube 44, 43.
  • FIGS. 7, 8 and 9 illustrate a modified embodiment of the invention in which the irradiating and pressure unit can be attached to and detached from a standardduplicating machine.
  • the duplicating drum 1 has only one holding means for the master sheet 4, and the coated sheet is not mounted on the duplicating drum, but is a band-shaped web 79 whose dye coating 82 is located opposite the peripheral surface of the duplicating drum and the carbon text 6 on the outside of master 4.
  • a support member 88, 136 can be operated to move between the inoperative position shown in FIG; 7 to an operative position in which a drive roller 86 frictionally engages the peripheral surface of duplicating drum 1 and is rotated by the same.
  • a pulley 83 is connected by slide clutch 100 to the drive roller 86 and drives through a belt 84 a pulley 81 on a shaft 76 rotating the takeup reel of the band-shaped coated web 79.
  • the coated web 79 is unwound from a takeoff reel on shaft 80 which is braked by a bar brake 112, biased by spring 113 and mounted on a pivot 111.
  • the support 88, with cam 136 is in the retracted position shown in FIG. 7, and the drive roller 86 is separated from the duplicating drum so that the same can perform the usual duplicating operations producing imprints of the master on copy sheets.
  • the support 88, 136 is shifted by a linkage connected with the manually operated rod 102.
  • lever 115 turns in the direction of the arrow F about pivot 116 and shifts, while turning lever 117 about pivot 118, latch 119 in the direction of the arrow G. Due to this motion, toggle levers 120, 121, which are controlled by guide lever 122 turning about pivot 118, move the source of radiation 25, the pressure rollers 12, 13, the drive roller 86, and the support 87 of the radiation source by means of support 88 and 136 to the inoperative position spaced from the duplicating drum. Support 88, 136 is mounted on support 87 of the source of radiation, which also supports pressure rollers l2 and 13 for rotation.
  • the housing 90 on which the above-described parts are mounted has brackets 137, 138, 139 and 140 which are mounted in slots in the sidewalls of the duplicating machine.
  • cam 109 causes movement of support 88, 136 to the operative position in the proximity of the duplicating drum 1 when the leading part of the master approaches the region of the source of radiation 25.
  • Spring 124 holds the cam follower roller in this position of rod 102 on the lower portion of cam 109.
  • a switch 75 has a slide contact 76a which cooperates with an arcuate contact 76a on the end walls of the duplicating drum as described with reference to FIG. 2 so that the source of radiation 25 is energized shortly before the leading part of the master approaches the source of radiation, and is deenergized when the trailing portion of the master has passed beyond the same.
  • the source of radiation may produce infrared radiation, or a high frequency ion radiator may be used.
  • the transfer of dye from the coated sheet 79 to the text 6 on master 4 may be effected during 1 or several revolutions of the duplicating drum.
  • the brake 112 prevents inertia rotation of the takeoff reel which may move the web into contact with the drum when the unit is moved to the inoperative position of FIG. 7 in which the takeup reel is not driven by drive wheel 86 since the same is spaced from the drum.
  • the apparatus is limited to the dyeing of master sheets, and is not used for duplicating operations so that drum 1 constitutes a carrier for the master 1 and is not used as a duplicating drum.
  • FIG. 8 illustrates a modified arrangement which corresponds to the construction described with reference to FIG. 7, but has instead of pressure rollers 12 and 13, a tubular transparent pressure member consisting of a glass tube 44 with a thin transparent cover 43, and enveloping the source of radiation, as described with reference to FIG. 5.
  • the method of the invention permits the use of a conventional duplicating machine for providing the text of the master with a layer of dye, or activating a master, the dye of whose text is exhausted by imprints on many copy sheets since the remaining text permits the adhering of dye from the coated sheet, as explained above.
  • a method of activating a master and printing with the same comprising attaching to a printing drum a master having on one side radiation absorbing means forming a reverse text so that said one side faces outward in a position ready for printing; placing at least a section of a sheet having on one side a coating of a transferable dye with said one side in contact with said one side of said master; rotating said printing drum with said master; moving said sheet in unison with said master so that pairs of sections of said sheet and master are successively superimposed; irradiating said superimposed sections and said coating between the same whereby radiation absorbed by said radiation absorbing means heats the portions of said coating which are in contact with said radiation absorbing means so that said heated portions of said coating adhere to said radiation absorbing means of said master; removing said sheet from said master while the same remains attached to said rotating printing drum so that said adhering heated portions remain on said radiation absorbing means whereby the reverse text formed by said heat absorbing means of said master is activated while the coating remaining on said sheet is removed with the same; placing
  • a method of activating a master and printing with the same comprising attaching to a printing drum a master having on one side radiation absorbing means forming a reverse text so that said one side faces outward in a position ready for printing; placing at least a section of a sheet having on one side a coating of a transferable dye with said one side-in contact with said one side of said master; rotating said printing drum with said master; moving said sheet in unison with'said master so that pairs of sections of said sheet and master are successively superimposed; irradiating said superimposed sections and said coating between the same whereby radiation absorbed by said radiation absorbing means heatsthe portions of said coating which are in contact with said radiation absorbing means so that said heated portions of said coating adhere to said radiation absorbing means of said master; gripping and holding the leading edge of said sheet during rotation of said printing drum with said master so that said sheet is peeled off said master while the same remains attached to said rotating printing drum so that said adhering heated portions remain on said radiation absorbing means.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Coloring (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Electronic Switches (AREA)
  • Printing Methods (AREA)
US619495A 1966-02-08 1967-02-03 Method of actuating a master and printing therefrom while on a printing drum Expired - Lifetime US3552317A (en)

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Application Number Priority Date Filing Date Title
DER42589A DE1259903B (de) 1966-02-08 1966-02-08 Verfahren und Vorrichtung zur Herstellung bzw. Regenerierung von abdruckfaehigen Spiegelbilddruckformen

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US3552317A true US3552317A (en) 1971-01-05

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US619495A Expired - Lifetime US3552317A (en) 1966-02-08 1967-02-03 Method of actuating a master and printing therefrom while on a printing drum
US825761A Expired - Lifetime US3648609A (en) 1966-02-08 1969-05-19 Apparatus for activating a printing master

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US825761A Expired - Lifetime US3648609A (en) 1966-02-08 1969-05-19 Apparatus for activating a printing master

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US (2) US3552317A (de)
CH (1) CH462849A (de)
DE (1) DE1259903B (de)
FR (1) FR1513691A (de)
GB (1) GB1168113A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3888174A (en) * 1971-01-28 1975-06-10 Bell & Howell Co Information reproduction utilizing electret material
US4006267A (en) * 1974-11-19 1977-02-01 Xerox Corporation Color highlighting process
US4465931A (en) * 1981-12-03 1984-08-14 Ricoh Company, Ltd. Thermal duplicating apparatus

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AR211781A1 (es) * 1975-09-03 1978-03-15 Lamm Ab Carl Aparato para la duplicacion de informaciones de una matriz provista de informacion
US4029184A (en) * 1976-04-09 1977-06-14 Eastman Kodak Company Pawl and ratchet clutch
DE3168661D1 (en) * 1980-10-17 1985-03-14 Fuji Xerox Co Ltd Heat transfer recording apparatus
US5931589A (en) * 1997-05-23 1999-08-03 Toshiba Tec Kabushiki Kaisha Ink-jet printer having a printing medium wrapping apparatus

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2740895A (en) * 1950-08-21 1956-04-03 Minnesota Mining & Mfg Thermoprinting apparatus
US3122997A (en) * 1958-04-04 1964-03-03 Figure
US3122998A (en) * 1960-06-02 1964-03-03 Infrared transfer process
US3148617A (en) * 1962-10-25 1964-09-15 Dick Co Ab Copy process
US3247793A (en) * 1963-03-27 1966-04-26 Dick Co Ab Thermographic method for imaging an offset master
US3251994A (en) * 1964-09-22 1966-05-17 Robert B Russell Thermographic copying machine having relatively movable, mating housing portions
US3257942A (en) * 1963-02-05 1966-06-28 Ritzerfeld Wilhelm Image reproducing arrangement and method
US3324292A (en) * 1964-10-26 1967-06-06 Robert B Russell Thermographic copying machine with a series of driven rollers to separate the copy and transfer sheets
US3379878A (en) * 1962-02-15 1968-04-23 Lumoprint Zindler Kg Thermographic reproduction apparatus with means to apply the radiation sensitive material just prior to exposure

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2740895A (en) * 1950-08-21 1956-04-03 Minnesota Mining & Mfg Thermoprinting apparatus
US3122997A (en) * 1958-04-04 1964-03-03 Figure
US3122998A (en) * 1960-06-02 1964-03-03 Infrared transfer process
US3379878A (en) * 1962-02-15 1968-04-23 Lumoprint Zindler Kg Thermographic reproduction apparatus with means to apply the radiation sensitive material just prior to exposure
US3148617A (en) * 1962-10-25 1964-09-15 Dick Co Ab Copy process
US3257942A (en) * 1963-02-05 1966-06-28 Ritzerfeld Wilhelm Image reproducing arrangement and method
US3247793A (en) * 1963-03-27 1966-04-26 Dick Co Ab Thermographic method for imaging an offset master
US3251994A (en) * 1964-09-22 1966-05-17 Robert B Russell Thermographic copying machine having relatively movable, mating housing portions
US3324292A (en) * 1964-10-26 1967-06-06 Robert B Russell Thermographic copying machine with a series of driven rollers to separate the copy and transfer sheets

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3888174A (en) * 1971-01-28 1975-06-10 Bell & Howell Co Information reproduction utilizing electret material
US4006267A (en) * 1974-11-19 1977-02-01 Xerox Corporation Color highlighting process
US4465931A (en) * 1981-12-03 1984-08-14 Ricoh Company, Ltd. Thermal duplicating apparatus

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FR1513691A (fr) 1968-02-16
CH462849A (de) 1968-09-30
DE1259903B (de) 1968-02-01
GB1168113A (en) 1969-10-22
US3648609A (en) 1972-03-14

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