US3750573A - Apparatus for attaching a printing foil or master to the cylinder of a printing machine - Google Patents

Apparatus for attaching a printing foil or master to the cylinder of a printing machine Download PDF

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Publication number
US3750573A
US3750573A US00288252A US3750573DA US3750573A US 3750573 A US3750573 A US 3750573A US 00288252 A US00288252 A US 00288252A US 3750573D A US3750573D A US 3750573DA US 3750573 A US3750573 A US 3750573A
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United States
Prior art keywords
hollow cylinder
foil
cylinder
rollers
sheet material
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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
US00288252A
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English (en)
Inventor
W Haeusler
H Herok
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.)
ROTO WERKE GmbH
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ROTO WERKE GmbH
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Publication date
Application filed by ROTO WERKE GmbH filed Critical ROTO WERKE GmbH
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    • 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
    • B41L17/00—Lithographic printing apparatus for office or other commercial purposes
    • B41L17/08—Lithographic printing apparatus for office or other commercial purposes for offset printing
    • B41L17/12—Lithographic printing apparatus for office or other commercial purposes for offset printing with curved printing surfaces, e.g. forme cylinders
    • 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
    • B41L29/00—Devices for attaching printing elements or formes to supports
    • B41L29/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41L29/14—Clamping devices
    • B41L29/16—Clamping devices operating automatically during operation of rotary machines to attach the printing formes to the forme cylinders

Definitions

  • the present apparatus greatly facilitates the handling of the printing foil or sheet material of which a printing master is produced for use in printing machines such as office offset machines.
  • the foil handling means include a first pair of rollers arranged inside a hollow foil cylinder for paying out a lengthof foil.
  • First clamping means are provided for securing the leading edge of the foil to said cylinder.
  • Second clamping means are provided for clamping down a portion of the foil which after severing becomes the trailing edge of the preceding master and the leading edge of the next following master. For this purpose the second clamping means are combined with severing means.
  • the invention relates to an apparatus for attaching or clamping a printing foil onto the cylinder of a printing machine and for ejecting the printing foil after the printing process has been completed.
  • the invention is particularly suitable as part of an office offset printing machine which is also equipped for preparing the printing foil or master, for example, by an electrostatic process.
  • German Pat. Publication DAS 1,283,249 shows an offset printing machine with a mechanism for feeding and ejecting printing foils. This arrangement takes up relatively much space whereby the printing foils are supplied individually to the machine. The entails considerable difficulties, particularly in the case of a combination machine such as described above.
  • U.S Pat. No. 3,491,684 discloses a combination type machine equipped for the preparation of printing forms from an original to be duplicated and for making a plurality of copies from this printing form.
  • the printing form material is fed from a supply roll located inside a cylinder over part of the cylinder surface back into the inside of the cylinder where it is wound up again on a take-up spool. Because of the two-spool arrangement in one cylinder, a cylinder of unusually large diameter for this type of machine is required, whereby only a small part of its surface is used to support the printing form.
  • an apparatus for attaching a printing foil or master to the cylinder of a printing machine wherein a freely rotatable foil supply roll is supported inside the foil cylinder, wherein means are provided for paying out foil from the cylinder, for clamping down both ends of the foil, for severing a length of foil, and wherein an ejecting mechanism is provided for removing the foils from the BRIEF FIGURE DESCRIPTION
  • FIG. 1 shows an office offset printing machine incorporating means for producing printing forms or masters and indicating schematically the mechanisms according to the invention
  • FIG. 2 shows a side view, in several planes, of the mechanism according to the invention
  • FIGS. 3 to 6 illustrate different phases of the action sequence or operation of the present mechanism
  • FIG. 7 is a front view of the present apparatus supplementing the view of FIG. 2;
  • FIG. 8 shows the arrangement of the foil supply roll in an exchangeable insert
  • FIG. 9 illustrates the arrangement of a supply roll in a cartridge inserted into the foil cylinder.
  • FIG. 1 shows an office offset printing machine 1 combined with means 2 for electrostatic copying.
  • the offset printing machine is of conventional structure, however, it is equipped with a mechanism according to the present invention which is essentially arranged within the area of a foil cylinder 3.
  • An original 4 supported by a carriage 5 is projected by'an optical system 6 onto the foil 7 which is attached to the cylinder 3.
  • the foil cylinder 3 is surrounded by equipment for developing the foil by any well-known electrostatic process into a printing form or master. Subsequently the printing process itself is performed by the well-known offset method.
  • FIG. 2 shows the foil cylinder 3 in which a supply rollv 8 of foil 7 is mounted such that it maybe freely rotated.
  • a freely rotatable pair of rollers 10 and 11 are also mounted inside the foil cylinder 3. Rollers l0 and 11 rotate in opposite directions whereby the movement at the point of cooperation of these rollers with each other is in the same direction.
  • One end of the roller 10 is ridigly connected to a gear wheel 12 which meshes with a further gear wheel 13 which in turn is rigidly attached to a clutch housing 14.
  • This housing 14 has a friction lining 15 on the inside and is rotatably mounted on the cylinder axis 9 forrotation independently of the cylinder 3.
  • a clutch lever 16 also having a friction lining 17 and a tension spring 18 is mounted on a shaft 19 secured to a side frame member.
  • the clutch lever 16 is actuated through a roller 20 and through a cam 21 which is secured to the cylinder shaft 9.
  • the clutch lever 16 is further equipped with a lock bolt 22 which may be engaged by a latch pawl 24 mounted under the tension of a spring 23 to the side wall of the foil cylinder 3.
  • the latch pawl 24 may be actuated by a programmed control mechanism not shown in the drawing.
  • the transmission ratio of the gear wheels 12 and 13 is such that the circumferential velocity of the roller corresponds to that of the foil cylinder 3.
  • a guide bar secured to the cylinder 3 serves for the insertion of the end of the foil 7 between the transport rollers 10 and 11.
  • a spring loaded clamping bar 26 is journaled to the cylinder 3 and rigidly connected to a roller lever 27. The clamping bar 26 rests on top of the guide bar 25.
  • Axially movable, program controlled, electromagnetically actuatable cams 28, 29 and are mounted in the side portion of the machine. These cams are shown in their active or effective positions 28a, 29a and 30a by dashed lines and in their neutral positions by solid lines.
  • a combined clamping and cutting device 31 is mounted on the inside of the foil cylinder 3 and rotates with the cylinder.
  • This device 31 comprises a base 32, a two-piece hold-down member 33, a cutting blade 34 guided and supported within the member 33 by a cross bar 35 and compression springs 36.
  • the hold-down bar 33 and the knife 34 are connected to each other at both ends of the device by connecting members 37.
  • One of these connecting members 37 is linked to a lever 39 which carries a roller 40.
  • the lever 39 is journaled to a stud 38 on a side wall of the cylinder 3 and is held in its neutral or starting position by a tension spring 49.
  • a lock bolt 41 is mounted on the lever 39 while a spring biased latch pawl 42 is journaled to the foil cylinder 3.
  • Another spring biased latch pawl 43 also journaled to the side wall of the cylinder 3 cooperates with a lever 45 which is mounted on a shaft 44.
  • a comblike ejection rake 46 and a further lever 47 which cooperates with a frame lug 48 are also mounted on the shaft 44.
  • a pair of rollers 50 and 51 are mounted outside of the foil cylinder 3 between the side frame members of the machine.
  • the roller 50 is freely rotatable between said side frame members, while the roller 51 which is provided with positive drive means is mounted on one end of a rocker lever 52.
  • the roller 51 is provided with a felt cover 53 and rotates in the same direction as the foil cylinder 3, whereby the movement of the foil cylinder 3 and of the roller 51 at the point of their cooperation is in opposite directions.
  • the rocker lever 52 is journaled on an axis 56 and carries at its other end a roller 54 which may be held under spring pressure against a cam disk 55 which is secured to the cylinder shaft 9.
  • the rocker lever 52 carries a lock bolt 57 adjacent to its axis which cooperates with a program controlled locking pawl 58 pivotally supported and spring biased in the side frame members.
  • FIG. 8 shows the foil cylinder 3 with an interchangeable segment shaped insert 61 which is provided with supports or bearing means 62 for the supply roll 8.
  • the guide bar 25, the clamping bar 26, the pair of rollers 10 and 11, the combined clamping and cutting device 31 and the ejection rake 46 are also located in said insert.
  • FIG. 9 illustrates the exchange of a supply roll 8 by means of a cartridge 63.
  • a segment shaped lid 64 is hinged on an axis 65.
  • the lid 64 comprises the same parts of the mechanism as depicted in FIG. 8, except for the supports of the supply roll.
  • the cartridge 63 has a handle 66 which in the inserted position of the cartridge is maintained in a tilted back position 66a whereby it facilitates the automatic feeding of the starting end of the supply roll 8 into the roller pair 10 and 11.
  • the side walls of the cartridge 63 are provided with guide grooves 67 which engage corresponding guide pins 68 and 69 on the foil cylinder 3.
  • the present apparatus operates as follows. In loading the supply roll 8 into the foil cylinder 3, first the starting end of the supply roll is inserted between the rollers 10 and 11 either by hand or automatically by using the cartridge containing the supply roll 8.
  • the roller 51 is lowered into contact with the foil and thus with the foil cylinder 3 whereby the foil engages the foil cylinder in a smooth wrinkle-free manner as the foil cylinder keeps rotating and whereby the roller 51 keeps the foil under light tension (FIG. 4).
  • the lowering of the roller 51 into position 51a is program controlled through the release and clockwise rotation of the lock pawl 58, thereby releasing the cranked lever 52 which then is rotated counter clockwise about its axis 56 by a spring force. After an almost full revolution of the foil cylinder 3 its outer sunface is covered by the foil 7 (FIG. 5).
  • the cam 28 which is moved by program control means (not shown) into its position 28a momentarily opens or lifts through roller lever 27 the hold-down bar 26 which, after passage of the cam 28, is closed again by the force of a spring.
  • the end of the foil isbent by the roller 51 around the edge of the cylinder mantle and held in position by the clamping bar 26 which is closed for this purpose.
  • the roller 54 of the rocker lever 52 rolls up on the cam disk 55 whereby the lever 52 is rotated clockwise .and the roller 51 is returned from its position 51a back into its original position.
  • the locking pawl 58 and the locking bolt 57 arrest the lever 52 in this position.
  • the spring supported hold-down bar 33 is pressed against the base bar 32 by the cam 29 through the roller lever 39 whereby the foil 7 is held in position (FIG. 5).
  • the roller lever 39 is held fixed in this position due to the engagement of lock pawl 42 and lock bolt 41.
  • the foil 7 is now tightly wound on the foil cylinder 3 and held between clamping bar 26 and the hold-down bar 33.
  • the clutch lever 16 is rotated by the cooperation of the roller 20 and the cam disk 21 in a counterclockwise direction, whereby the locking pawl 24 engages the locking bolt 22.
  • the clutch housing is released and the roller 10 is not driven any longer, thus stopping any further pay out of the foil 7. Meanwhile the cams 28 and 29 have been moved back into neutral position by the program control means.
  • the cam 30 is moved into position 30a by the program control means.
  • the roller lever 39 is rotated further counter-clockwise about its axis 38 due to the contact of the roller 40 with cam 30 in its position 30a.
  • This rotation of the lever 39 lowers the knife 34 for cutting the foil 7.
  • the lever 45 is released whereby the ejector rake 46 which is connected to the lever 45 turns clockwise thereby lifting the foil 7 as shown in FIG. 6.
  • the rotating foil cylinder 3 then deposits the cut and lifted end of the foil 7 on a guide plate 59 inserting it between the rollers 50 and 51 which then take over the further transport of the foil.
  • the apparatus is thus ready for paying out a new foil length the starting end of which is located in th'e'clamping and cutting device 31 where it is held by the roller pair and 11.
  • the foil handling rollers 10, 11 are arranged inside the foil cylinder 3 and that such pair of rollers rotate along with the foil cylinder 3. These rollers are connected through a gear wheel drive to a clutch housing which is rotatably mounted on the cylinder axis and which may be coupled to the rollers by a clutch lever 16 pivoted to the frame structure.
  • the mechanism for clamping one end of the foil comprises said holddown member 33 which is combined with the cutting device for separating the foil.
  • the described ejector rake is preferably arranged for cooperation with the clamping and'cutting mechanism for lifting the foil the rake is hinged'to the foil cylinder.
  • a further pair of rollers are arranged for transporting the cut foil out of the cylinder.
  • one of these rollers is arranged to be lowered against the foil cylinder.
  • This movable roller 51 rotates in the same direction as the foil cylinder 3 to provide a counter movement at the point of cooperation between the foil cylinder 3 and the roller 51.
  • the roller 5] is covered with a felt sheath which has the advantage thatthe foil is handled with care.
  • Another advantage of the invention is seen in that an interchangeable segment shaped insert carrying the bearings for the supply roll of foil is located in the foil cylinder together with said pair of rollers 10 and 11 for the transport of the foil, the clamping and cutting mechanism and the ejecting rake for lifting the cut foil, because this not only provides a compact structure, it also assures an easy access to all elements.
  • a further preferred embodiment of the invention employs a cartridge in which the roll of foil is located and which is insertable into the foil cylinder.
  • This allows a particularly simple, loading or insertion of the supply roll in that the cartridge may be constructed in such a way that the starting end of the foil is automatically inserted between the transport rollers for the pay out of foil.
  • An especially easy insertion of the supply roll of foil or the cartridge is achieved by providing the foil cylinder with a segment shaped lid.
  • An apparatus for attaching a printing master made from sheet or foil material paid out from a supply roll to a cylinder ofa printing machine and for ejecting said master after the printing run comprising a hollow cylinder, means for rotatably supporting and driving said hollow cylinder in said apparatus, means for rotatably supporting said supply roll inside said hollow cylinder, means for paying out sheet material from said supply roll out of said hollow cylinder, means for clamping a length of sheet material at both ends thereof, severing means arranged for severing said length of sheet material from said supply roll, and means for ejecting the severed length of sheet material from said hollow cylinder.
  • said means for paying out sheet material comprise a pair of rollers, means for rotatably supporting said pair of rollers inside said hollow cylinder, means for positively driving said pair of rollers together with said hollow cylinder, said means for positively driving said pair of rollers comprising a gear wheel train, clutch means for coupling said gear wheel train to said hollow cylinder, and actuator means for engaging and disengaging said clutch means with said hollow cylinder.
  • clamping means comprise hold-down means
  • said'se vering means comprising. a cutting b ladmsaid apparatus further comprising means for coupling said hold-down means and said cutting blade to each other.
  • saidhold-down means comprise two' hold-down bars arranged in parallelto each other and spaced fromeach other to provide a gap therebetween, and means for supporting said cutting blade for movement into said gap, whereby one of said hold-down bars secures a portion of the sheet material which after the severing be comes the trailing edge of said length of sheet material while the other of said hold-down bars secures a portion of the sheet material which after said severing'becomes the leading edge of the next succeeding length of sheet material.
  • said ejecting means comprise an ejecting rake, means for rotatably supporting said ejecting rake adjacent to said clamping and severing means and means for tilting said ejecting rake into and out of a sheet lifting position;
  • said means for rotatably supporting said further pair of rollers comprises rocker arm means carrying at one end thereof one roller of said further pair of rollers, means for operating said rocker arm whereby said one roller may be tilted against the hollow cylinder, and means for positively driving said one roller of said further pair of rollers in the same direction of rotation as said hollow cylinder whereby said one roller and said hollow cylinder move in the same direction at the point of cooperation.
  • said one roller comprises a felt cover on its outer cylindrical surface.
  • said hollow cylinder comprises an interchangeable insert member, said insert member comprising means for supporting said supply roll, said means for paying out sheet material, said clamping and severing means, as well as said ejecting means, whereby these means just listed are exchangeable together with said insert member.

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US00288252A 1971-09-15 1972-09-12 Apparatus for attaching a printing foil or master to the cylinder of a printing machine Expired - Lifetime US3750573A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2146037A DE2146037A1 (de) 1971-09-15 1971-09-15 Vorrichtung zum aufspannen einer druckfolie auf den zylinder einer druckmaschine

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US3750573A true US3750573A (en) 1973-08-07

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US00288252A Expired - Lifetime US3750573A (en) 1971-09-15 1972-09-12 Apparatus for attaching a printing foil or master to the cylinder of a printing machine

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JP (1) JPS4897608A (de)
DE (1) DE2146037A1 (de)
FR (1) FR2149249A5 (de)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3828672A (en) * 1972-10-17 1974-08-13 American Bank Note Co Apparatus for fitting flexible printing plates and rigging to printing press cylinders
US3943850A (en) * 1972-09-15 1976-03-16 Gestetner Limited Core holder for stencil or ink screen
US3995951A (en) * 1975-03-26 1976-12-07 Xerox Corporation Sheet feeding apparatus and reproducing machine
US4057016A (en) * 1975-05-19 1977-11-08 Canon Kabushiki Kaisha Process for electrostatic printing and apparatus therefor
US4219272A (en) * 1978-04-20 1980-08-26 Olympia Werke Ag Electrophotographic copier with replaceable photoconductive sheet
US4277164A (en) * 1978-07-14 1981-07-07 Olympia Werke Ag Photocopier photoconductive sheet holding device
US4408530A (en) * 1982-08-13 1983-10-11 Mitsubishi Jukogyo Kabushiki Kaisha Automatic printing plate exchange system
US4765654A (en) * 1985-12-16 1988-08-23 Mitsubishi Denki Kabushiki Kaisha Single-sheet printer paper and a method for its use
US4919045A (en) * 1987-10-14 1990-04-24 Ricoh Company, Ltd. Offset printer having a press drum larger than its rubber drum
US5413043A (en) * 1992-04-24 1995-05-09 Man Roland Druckmaschinen Ag Printing apparatus including a forme cylinder and method of preparing the forme cylinder for printing
US5435242A (en) * 1992-07-23 1995-07-25 Heidelberger Druckmaschinen Aktiengesellschaft Plate cylinder for a printing press having plate material in a cartridge within the plate cylinder
US5443556A (en) * 1993-03-18 1995-08-22 Riso Kagaku Corporation Method and apparatus for mounting a master plate on a printing drum having an integral cutter
US5622111A (en) * 1994-09-15 1997-04-22 Man Roland Druckmaschinen Ag Form cylinder with printing foil wind control
US6308629B1 (en) * 1995-05-10 2001-10-30 Duco International Limited Manipulation of printing blankets
EP1243430A1 (de) * 2001-03-19 2002-09-25 Eastman Kodak Company Tintenstrahldrucksystem mit Innentrommelpapierzuführ
US6827017B2 (en) * 2001-05-17 2004-12-07 Day International, Inc. Method of dispensing metal-backed printing blankets
US20060272525A1 (en) * 2001-05-17 2006-12-07 Elia John R Method of dispensing metal-backed printing blankets
US20130312916A1 (en) * 2012-05-22 2013-11-28 Jtekt Corporation Electrode production system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5126109A (ja) * 1974-08-24 1976-03-03 Tokyo Aircraft Instr Co Jidoseihaninsatsukitoniokeru genbanjidochakudatsusochi

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1760152A (en) * 1926-03-25 1930-05-27 Hans K Lorentzen Duplicator
US3491684A (en) * 1966-07-05 1970-01-27 Fallstaff Office Products Inc Unitary master and copy machine
US3682095A (en) * 1970-05-22 1972-08-08 Olivetti & Co Spa Duplicating machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1760152A (en) * 1926-03-25 1930-05-27 Hans K Lorentzen Duplicator
US3491684A (en) * 1966-07-05 1970-01-27 Fallstaff Office Products Inc Unitary master and copy machine
US3682095A (en) * 1970-05-22 1972-08-08 Olivetti & Co Spa Duplicating machine

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3943850A (en) * 1972-09-15 1976-03-16 Gestetner Limited Core holder for stencil or ink screen
US3828672A (en) * 1972-10-17 1974-08-13 American Bank Note Co Apparatus for fitting flexible printing plates and rigging to printing press cylinders
US3995951A (en) * 1975-03-26 1976-12-07 Xerox Corporation Sheet feeding apparatus and reproducing machine
US4057016A (en) * 1975-05-19 1977-11-08 Canon Kabushiki Kaisha Process for electrostatic printing and apparatus therefor
US4219272A (en) * 1978-04-20 1980-08-26 Olympia Werke Ag Electrophotographic copier with replaceable photoconductive sheet
US4277164A (en) * 1978-07-14 1981-07-07 Olympia Werke Ag Photocopier photoconductive sheet holding device
US4408530A (en) * 1982-08-13 1983-10-11 Mitsubishi Jukogyo Kabushiki Kaisha Automatic printing plate exchange system
US4765654A (en) * 1985-12-16 1988-08-23 Mitsubishi Denki Kabushiki Kaisha Single-sheet printer paper and a method for its use
US4919045A (en) * 1987-10-14 1990-04-24 Ricoh Company, Ltd. Offset printer having a press drum larger than its rubber drum
US5413043A (en) * 1992-04-24 1995-05-09 Man Roland Druckmaschinen Ag Printing apparatus including a forme cylinder and method of preparing the forme cylinder for printing
US5435242A (en) * 1992-07-23 1995-07-25 Heidelberger Druckmaschinen Aktiengesellschaft Plate cylinder for a printing press having plate material in a cartridge within the plate cylinder
USRE36275E (en) * 1992-07-23 1999-08-24 Heidelberger Druckmaschinen Ag Plate cylinder for a printing press having plate material in a cartridge within the plate cylinder
US5443556A (en) * 1993-03-18 1995-08-22 Riso Kagaku Corporation Method and apparatus for mounting a master plate on a printing drum having an integral cutter
US5622111A (en) * 1994-09-15 1997-04-22 Man Roland Druckmaschinen Ag Form cylinder with printing foil wind control
US6308629B1 (en) * 1995-05-10 2001-10-30 Duco International Limited Manipulation of printing blankets
EP1243430A1 (de) * 2001-03-19 2002-09-25 Eastman Kodak Company Tintenstrahldrucksystem mit Innentrommelpapierzuführ
US6827017B2 (en) * 2001-05-17 2004-12-07 Day International, Inc. Method of dispensing metal-backed printing blankets
US20060272525A1 (en) * 2001-05-17 2006-12-07 Elia John R Method of dispensing metal-backed printing blankets
US7216587B2 (en) 2001-05-17 2007-05-15 Day International, Inc. Method of dispensing metal-backed printing blankets
US20130312916A1 (en) * 2012-05-22 2013-11-28 Jtekt Corporation Electrode production system

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Publication number Publication date
JPS4897608A (de) 1973-12-12
DE2146037A1 (de) 1973-03-22
FR2149249A5 (de) 1973-03-23

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