US3702586A - Device for switching between automatic and non-automatic master plate feeding and removing operations for offset printing machines - Google Patents

Device for switching between automatic and non-automatic master plate feeding and removing operations for offset printing machines Download PDF

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Publication number
US3702586A
US3702586A US70003A US3702586DA US3702586A US 3702586 A US3702586 A US 3702586A US 70003 A US70003 A US 70003A US 3702586D A US3702586D A US 3702586DA US 3702586 A US3702586 A US 3702586A
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United States
Prior art keywords
actuation member
master plate
switching
feeding
master
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Expired - Lifetime
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US70003A
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English (en)
Inventor
Tamaki Kaneko
Katsumi Mizuno
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Ricoh Co Ltd
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Ricoh Co Ltd
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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
    • B41L39/00—Indicating, counting, warning, control, or safety devices

Definitions

  • These operations include a master plate feeding operation for feeding a master plate to a master cylinder, an etching operation for applying an ink repellent etching solution to the master plate mounted on the master cylinder, an inking operation for applying ink to the master plate, a copy sheet feeding operation for feeding one copy sheet after another between blanket and impression cylinders, a master plate removal operation for removing the master plate from the master cylinder after completion of duplication, and a blanket cylinder cleaning operation.
  • the device comprises an automatic, non-automatic switching actuation member capable of moving relative to said actuation member.
  • a rotary offset printing machine comprises, as shown in FIG. I, a master cylinder 1, blanket cylinder 2 and impression cylinder 3.
  • a master plate is w mounted on the master cylinder 1 and an ink repellent etching solution and ink are applied successively to the master cylinder.
  • a series of printing operations broadly consist of a master plate feeding operation, etching opera tion, inking operation, copy sheet feeding operation, master plate removal operation, and blanket cylinder cleaning operation.
  • an actuation member 4 for switching between various operations disposed in a neutral position is successively moved into positions 4A, 4B, 4C, and 40 shown in dot-and-dash lines, so that the master plate feeding and etching operations are automatically performed in the 4A position, the inking operation is automatically performed in the 48 position, the copy sheet feeding operation is automatically performed in the 4C position and master plate removal and blanket cylinder cleaning operations are automatically performed in the 4D position.
  • the construction and operation of the actuating member 4 will be subsequently described in detail.
  • the present invention proposes to obviate the aforementioned disadvantage of the prior art by providing a device for switching between automatic and non-automatic master plate feeding and removal operations for rotary offset printing machines which permits, when a cycle of printing operations as aforementioned are automatically performed by moving the actuation member 4, the master plate feeding, etching and master plate removal operations to be switched between automatic and non-automatic operations as desired by actuating a switching actuation member provided in the actuation member.
  • FIG. I is a side view of a rotary offset printing machine incorporating the present invention.
  • FIG. 2 is a sectional view taken along the line II-II of FIG. 1;
  • FIG. 3 is a fragmentary view of FIG. 2, showing the switching actuation member in its lower position in which it is disposed within the actuation member;
  • FIG. 4 is a perspective view of the mechanism shown in FIG. 2;
  • FIG. 5 is a side view of another embodiment of the switching actuation member used in the device according to this invention.
  • FIG. 6 is a sectional view taken along the line VI-VI of FIG. 5;
  • FIGS. 7 to 9 are sectional views taken along the line VII-VII of FIG. 2, showing the actuation member in different positions;
  • FIG. 10 is a front view of one embodiment of the automatic master plate removal command cam
  • FIG. 12 is a side view of the automatic etching unit and automatic master plate feeding unit attached to a printing machine incorporating the present invention.
  • the master cylinder 1, blanket cylinder 2 and impression cylinder 3 are each supported by a shaft attached to opposite side plates 5 of the machine for rotation in unison.
  • the actuation member 4 for switching between operations is tubular in shape, as shown in FIG. 2, and has a base secured to a bevelled surface 6a formed in the forward end of a tubular shaft 6 which is rotatably mounted in a minor diameter por tion 7a of a spindle 7 secured to one of the side plates 5.
  • a click plate 8 Secured to the base of the tubular shaft 6 is a click plate 8 having a corrugated edge 8a formed with waveshaped elevated portions and depressed portions (see FIG. I and FIG. 4).
  • a pin 12 attached to a lever 11 urged by a spring 9 (FIG. 1) to move in pivotal motion about a shaft 10 in an anticlockwise direction is received in and presses against one of the depressed portions in the corrugated edge 80.
  • the corrugated edge cooperates with the pin 12 to click stop the actuation member 4 in position when it is moved from its neutral position to its positions 4A, 4B, 4C, and 4D in FIG. I.
  • a support member 13 is fitted over the upper surface of the tubular shaft 6 (See FIG. 4), and a U-shaped supporting member 14 is attached to the upper surface of the supporting member 13.
  • a shaft 16 attached to the U-shaped supporting member 14 is an automatic/non-automatic switching member 15 (See FIG. 2) which is formed at one end with a fork 15a engaging the base of the actuation member 4.
  • a spring 17 mounted at the base of the actuation member 4 is a spring 17 which urges the fork 15a of the switching member 15 to move upwardly.
  • the switching member 15 is urged to move in pivotal motion in a clockwise direction about the shaft 16 in FIG. 2.
  • an automatic/nomautomatic switching actuation member 18 having a head 18a projecting upwardly above the upper end of the actuation member 4.
  • Attached to the lower end of the switching actuation member 18 is a radially directed pin 19 which is loosely received in a slot 4a formed in the actuation member 4 near its base.
  • the upper surface of the fork 15a of the switching member 15 which is urged to move in the clockwise direction about the shaft 16 as aforementioned presses against the radial pin 19.
  • the pin 19 presses against the upper edge of the slot 4a. With the pin 19 in this position, the head 18a of the switching actuation member 18 projects slightly upwardly above the upper end of the actuation member 4.
  • the switching member 15 has an arm 15b whose forward end is received, through a radially disposed slot 8b (FIG. 4) formed in the click plate 8, in cam slots 21a and 22a formed in the cams 21 and 22 respectively.
  • the forward end of the arm 15b is maintained in contact with an arcuate edge 21a, and 22a, (FIGS. 10 and 11) of the cams 21a and 22a respectively (See FIG. 7, 10 and 11).
  • the earns 21 and 22 have arms 21b and 22b respectively, with the cam 21 being urged to move in an anticlockwise direction by a spring 23 mounted on its arm 21b and the cam 22 being urged to move in a clockwise direction by a spring (not shown) mounted on its arm 22b.
  • the arms 21b and 22b abut against a stopper 24 attached to the side wall so as to limit the movements of the earns 21 and 22 and keep them in their neutral positions shown in FIG. 1 and FIG. 7.
  • the switching member 4 If now the actuation member 4 is moved from its neutral position to its dot-and-dash line position 4A in FIG. 1 while the switching actuation member 18 is in its lower position, then the switching member also moves in the same direction. At this time, the arm 15b of the member 15 is brought into pressing engagement with an end of the mountain-shaped edge 2202 of the automatic master plate feed command cam 22 and causes the cam 22 to move in the same direction (See FIG. 8).
  • the cams 21 and 22 are shaped such that the mountain-shaped edge 2102 of the cam 21 is slightly deviated from the mountain-shaped edge 2202 of the cam 22 so that the cam 21 may not interfere with the movement of the cam 22.
  • an arm 25 is pivotally supported by a shaft 26 attached to one of the side plates (the plane of the figure is considered to be the side plate) of the machine.
  • the arm 25 is urged by a spring (not shown) to move in an anti-clockwise direction about the shaft 26.
  • a roller 27 mounted on a shaft attached to the arm 25 is a roller 27 which presses against the elevated portion of a wave-shaped cam edge 220 formed on the outer periphery of the cam 22 (FIG. 11).
  • FIG. .8 shows the arm 15b of the member 15 which is maintained in engagement with the mountain-shaped edges 21a, and 22a, of the cams 21 and 22 respectively. Since the arm 21b of the cam 21 abuts against the stopper 24, the arm 15b will move downwardly along the mountain-shaped edges 21a, and 22a, of the cams 21 and 22 respectively as the actuation member 4 is moved from its position 4A to its position 48. Thus, the switching actuation member 18 is restored to its original position.
  • the actuation member 4 Upon completion of the copy sheet feeding operation, the actuation member 4 is returned from the position 4C to the neutral position through positions 48 and 4A. At this time, the actuation member 4 moves while the switching actuation member 18 is in its upper position, thereby preventing the next succeeding master plate from being fed to the master cylinder on which the preceding master plate is still mounted. During the movement of the member 4 from its position 4C to its position 48, the switching member only moves in sliding motion along the arcuate edges 21a and 22a of the cams 21 and 22 respectively as aforementioned, so that the switching actuation member 18 cannot be moved to its lower position.
  • a roller 35 which is kept in engagement with the depressed portion of a wave-shaped cam edge 21c formed on the outer periphery of the cam 21.
  • the roller 35 is brought into engagement with the elevated portion of the waveshaped peripheral cam edge 21c of the cam 21, causing the arm 33 to move in pivotal motion in an anticlockwise direction about the shaft 34 (See FIG. 9).
  • a pin 36 is attached to the free end of the arm 33 which pin 36 is received in an opening 5b formed in the side plate 5.
  • the pin 36 moves in the opening 5b from the position shown in FIG.
  • the cams 21 and 22 are shaped such that the mountain-shaped edge 22a, of the cam 22 has a length which is sufficiently great not to interfere with the movement of the cam 21 when it is moved by the switching member 15.
  • a supporting side plate 38 for a master plate feeding unit 37 and a supporting side plate 40 for an etching unit 39 are mounted on shafts 41, 42, and 43 attached to one of the side plates 5 of the machine.
  • lever 44 If the lever 44 is moved in the direction of the arrow a, then the lever 48 moves in an anticlockwise direction about the shaft 50 in slaved relation to the pin 28.
  • a roller support arm 51 is secured to the inner end of the shaft 50, so that pivotal movement of the lever 44 causes the support arm 51 to move downwardly.
  • This causes an etching solution applying roller 52 to move away from a fountain roller 53 and intermediate roller 54 to the master cylinder side, so that the roller 52 is brought into contact with the master plate 47 as soon as it is mounted on the master cylinder 1 to apply an etching solution thereto.
  • FIG. 5 shows another embodiment of the switching actuation member according to this invention.
  • a tubular switching actuation member 62 is fitted over an operation switching actuation lever 61 which is formed at its base with an opening 61a receiving a sliding member 63 therein.
  • a pin 64 secured to the sliding member 63 is caused to abut against the fork 15a of the automatic non-automatic switching member 15.
  • the switching actuation member 62 is formed with an end surface cam 62a at it lower end, so that rotation of the switching actuation member 62 causes the switching member 15 to move in pivotal motion. Any suitable means may be used for bringing the automatic non-automatic switching member 15 into contact with the automatic master plate feed command cam or automatic master plate removal command cam described previously.
  • the end surface cam 620 formed at the lower end of the member 62 in FIG. 5 may be dispensed with and the member 62 may be adapted to merely move up and down.
  • an automatic non-automatic switching member 66 may be secured to the switching actuation member 62 as shown in dotand-dash lines in FIG. 5 and the member 62 may be normally urged to move downwardly, so that when the switching actuation member 62 is moved upwardly the switching member 66 can be brought into engagement with the automatic master plate feed command cam or removal command cam.
  • the present invention permits the operator to operate his automatic printing machine readily by selectively switching the machine between automatic and non-automatic operations.
  • the disadvantage of feeding a master plate to the master cylinder on which the preceding master plate is still mounted when the operation switching actuation member is restored to its neutral position can be obviated.
  • An ofiset printing machine including a master cylinder, means actuable for feeding a master plate to the master cylinder and for etching the plate, means actuable for removing the master plate from the master cylinder, an actuation member having a single handle, means for mounting said actuation member for movement between a neutral position and a first position for actuating the master plate feeding and etching means, and between the neutral position and a second position for actuating the master plate removing means, means including cam means for connecting the actuation member to said means for feeding and etching, and means including cam means for connecting the actuation member to said means for removing, wherein the improvement is in means for selectively moving the actuation member to the first position without actuating the master plate feeding and etching means and for selectively moving the actuation member to the second position without actuating the master plate removing means, for the purpose of allowing manual feeding and etching of a master plate while the actuation member is in its first position and manual removal of the master plate while the
  • An offset printing machine as in claim 1 including means actuable for inking the master plate mounted on the master cylinder and wherein the actuation member is movable from its first position to a third position for actuating said master plate inking means.

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  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Mechanical Control Devices (AREA)
US70003A 1969-09-13 1970-09-08 Device for switching between automatic and non-automatic master plate feeding and removing operations for offset printing machines Expired - Lifetime US3702586A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP44072886A JPS5110130B1 (enrdf_load_stackoverflow) 1969-09-13 1969-09-13

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US3702586A true US3702586A (en) 1972-11-14

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US70003A Expired - Lifetime US3702586A (en) 1969-09-13 1970-09-08 Device for switching between automatic and non-automatic master plate feeding and removing operations for offset printing machines

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US (1) US3702586A (enrdf_load_stackoverflow)
JP (1) JPS5110130B1 (enrdf_load_stackoverflow)
CA (1) CA938159A (enrdf_load_stackoverflow)
DE (1) DE2045149C3 (enrdf_load_stackoverflow)
DK (1) DK132875C (enrdf_load_stackoverflow)
FR (1) FR2061244A5 (enrdf_load_stackoverflow)
GB (1) GB1320042A (enrdf_load_stackoverflow)
NL (1) NL164227C (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766853A (en) * 1972-04-04 1973-10-23 Dick Co Ab System for cleaning rollers of a duplicating machine, such as ink rollers
US3858508A (en) * 1969-09-15 1975-01-07 Ricoh Kk Offset printing machine
US3956985A (en) * 1973-11-16 1976-05-18 Ryobi, Ltd. Operating lever mechanism for offset printing press
US3998159A (en) * 1974-09-20 1976-12-21 Image Duplicating Systems Inc. Pattern copying machine
US4027588A (en) * 1973-12-28 1977-06-07 Ryobi, Ltd. Control mechanism for an offset printing machine
US4084508A (en) * 1975-08-18 1978-04-18 Ricoh Company, Ltd. Offset printing machine comprising improved control mechanism
US4134341A (en) * 1975-12-30 1979-01-16 Rolf Erich Muller Duplicating apparatus

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056346A (en) * 1960-01-14 1962-10-02 Addressograph Multigraph Printing machine
US3412676A (en) * 1965-07-07 1968-11-26 Dick Co Ab Automated control system and apparatus for offset duplicating machine
US3431841A (en) * 1964-07-24 1969-03-11 Dick Co Ab Offset duplicating machines with master loading and ejecting mechanisms
US3457857A (en) * 1966-07-29 1969-07-29 Addressograph Multigraph Control system for master processing and duplicating
US3490367A (en) * 1965-12-30 1970-01-20 Ricoh Kk Rotary offset printing machine
US3496864A (en) * 1964-07-24 1970-02-24 Dick Co Ab Offset duplicating machine with combined control mechanism for etch applicator and master loading mechanism
US3577916A (en) * 1969-04-08 1971-05-11 Dick Co Ab Duplicator program control assembly
US3595351A (en) * 1969-03-13 1971-07-27 Takuo Ishida Manual control means for operating a speed change gear and a brake for a bicycle
US3601045A (en) * 1968-12-26 1971-08-24 Baeuerle Gmbh Mathias Operating controls for an offset printing press

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056346A (en) * 1960-01-14 1962-10-02 Addressograph Multigraph Printing machine
US3431841A (en) * 1964-07-24 1969-03-11 Dick Co Ab Offset duplicating machines with master loading and ejecting mechanisms
US3496864A (en) * 1964-07-24 1970-02-24 Dick Co Ab Offset duplicating machine with combined control mechanism for etch applicator and master loading mechanism
US3412676A (en) * 1965-07-07 1968-11-26 Dick Co Ab Automated control system and apparatus for offset duplicating machine
US3490367A (en) * 1965-12-30 1970-01-20 Ricoh Kk Rotary offset printing machine
US3457857A (en) * 1966-07-29 1969-07-29 Addressograph Multigraph Control system for master processing and duplicating
US3601045A (en) * 1968-12-26 1971-08-24 Baeuerle Gmbh Mathias Operating controls for an offset printing press
US3595351A (en) * 1969-03-13 1971-07-27 Takuo Ishida Manual control means for operating a speed change gear and a brake for a bicycle
US3577916A (en) * 1969-04-08 1971-05-11 Dick Co Ab Duplicator program control assembly

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858508A (en) * 1969-09-15 1975-01-07 Ricoh Kk Offset printing machine
US3766853A (en) * 1972-04-04 1973-10-23 Dick Co Ab System for cleaning rollers of a duplicating machine, such as ink rollers
US3956985A (en) * 1973-11-16 1976-05-18 Ryobi, Ltd. Operating lever mechanism for offset printing press
US4027588A (en) * 1973-12-28 1977-06-07 Ryobi, Ltd. Control mechanism for an offset printing machine
US3998159A (en) * 1974-09-20 1976-12-21 Image Duplicating Systems Inc. Pattern copying machine
US4084508A (en) * 1975-08-18 1978-04-18 Ricoh Company, Ltd. Offset printing machine comprising improved control mechanism
US4134341A (en) * 1975-12-30 1979-01-16 Rolf Erich Muller Duplicating apparatus

Also Published As

Publication number Publication date
GB1320042A (en) 1973-06-13
DK132875C (da) 1976-09-13
DK132875B (da) 1976-02-23
NL7013494A (enrdf_load_stackoverflow) 1971-03-16
FR2061244A5 (enrdf_load_stackoverflow) 1971-06-18
NL164227C (nl) 1980-12-15
DE2045149B2 (de) 1973-03-01
CA938159A (en) 1973-12-11
JPS5110130B1 (enrdf_load_stackoverflow) 1976-04-01
DE2045149A1 (de) 1971-06-09
DE2045149C3 (de) 1973-09-13

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