US3749009A - Ink supply device for mimeographing machine - Google Patents

Ink supply device for mimeographing machine Download PDF

Info

Publication number
US3749009A
US3749009A US00166077A US3749009DA US3749009A US 3749009 A US3749009 A US 3749009A US 00166077 A US00166077 A US 00166077A US 3749009D A US3749009D A US 3749009DA US 3749009 A US3749009 A US 3749009A
Authority
US
United States
Prior art keywords
hook member
operable
printing cylinder
ink
hook
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
US00166077A
Other languages
English (en)
Inventor
M Suzuki
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Application granted granted Critical
Publication of US3749009A publication Critical patent/US3749009A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B41L27/00—Inking arrangements or devices
    • B41L27/04—Ducts, containers, or supply devices or ink-level control devices
    • B41L27/10—Ducts, containers, or supply devices or ink-level control devices with ink-ejecting means, e.g. pumps
    • 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
    • B41F27/10—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders

Definitions

  • a rotary mimeographing machine comprises a pair of printing cylinders,, about which an endless screen of fine mesh is. trained, a pair of ink form rollers maintained in pressing engagement with the printing cylinders, and an impression roller maintained in pressing engagement with one of the printing cylinders, with a screen being interposed therebetween.
  • the objective of the present invention is to provide an ink supply device for mimeographing machines, whichissimple in construction and which is adapted to produce an ink supply command singal as the downward movement of a copy sheet feed roller reaches a predetermined amount after a substantially uniform number of sheets has been printed. Thereby, a quantity of ink can be delivered to the periphery of one of the printing cylinders to replenish the ink thereon.
  • Another objective of the invention is to provide an ink supply device, for mimeographing machines, which is effective to prevent a large quantity of ink from being supplied unnecessarily to the printing cylinder responsive to the copy sheet feed roller being in its lower position whereinan ink supply command signal is continuously produced eventhough no copysheets are placed on the feed tray or the feedtray is moved downwardly either manually or automatically.
  • the ink supply device delivers a quantity of ink to the printing cylinder only when a copy sheet feed operation is performed, and as a result of production of an ink supply command signal, so that excess supply of ink to the printing cylinder is prevented when this is not required.
  • the ink supply device is simple in construction and reliable in performance, and automatically performs an ink supply operation in conjunction with the upward movement of a copy sheet feed tray.
  • the supply device replenishes ink on the printing cylinder, to compensate for reduction in the supply of ink on the cylinder as printing progresses, by delivering a quantity of ink without requiring any means for counting the number of sheets fed or any mechanism for issuing instructions for initiating an ink supply.
  • the ink supply device of the present invention operates in a mannersuch thatthe ink supplymechanism is not rendered operative when no copy sheet is fed to the printing cylinder, even if an ink supply command signal is given to the ink supply mechanism.
  • a quantity of ink is delivered to the printing cylinder only when an ink supply command signal is produced to render the supply mechanism operative and in conjunction with the operation of the copy sheet device.
  • the ink supply mechanism is not operative when the pair of printing cylinders is idling and the copy sheet feed roller is in its lower position, because the stack of copy sheets on the feed tray is not at a required level. This occurs when an ink supply command signal is continuously produced,
  • An object of the invention is to provide an improved ink supply device for a mimeographing machine.
  • Another object of the invention is to provide such an ink supply device which is simple in construction and reliable in operation.
  • a further object of the invention is to provide such an ink supply device which operates only responsive to a predetermined reduction in the number of sheets in a stack of copy sheets.
  • FIG. 1 is a side elevation view of an ink supply device in accordance with one embodiment of the present invention
  • FIGS. 2 and 3 are side elevation views of the copy sheet feed mechanism
  • FIG. 4 is side elevation view of the ink supply device in its state when no copy sheet is fed
  • FIG. 5 is a side elevation view of the ink supply device in the state where a copy sheet feed operation is performed and an ink supply command signal is produced;
  • FIGS. 6, 7, and 8 are partial side elevation views explanatory of the manner in which the ink supply device operates.
  • a mimeograph machine is illustrated as including two printing cylinders l and 2 about which an endless screen 3, of fine mesh, is trained, screen 3 mounting a stencil copy of an original print (not shown).
  • Cylinders 1 and 2 which are adapted to rotate counter-clockwise, are supported by respective shafts 4 and 5 in turn supported, at their ends, in side plate 6 of the mimeographing machine. Endless screen 3 also travels in a counterclockwise direction.
  • Ink form rollers 9 and 11 are mounted on respective shafts 7 and 8 supported in side plates 6, and are maintained in engagement with the peripheries of cylinders 1 and 2, as shown in FIG. I.
  • An actuation cam 14 is mounted on shaft 4 of cylinder 1, and is rotated in a direction opposite to the direction of rotation of cylinder 1, or clockwise, by a gearing (not shown) provided between cylinder 1 and cam 14.
  • Cam 14 has a major diameter portion 14a with which a roller 16, mounted on a follower 15, is maintained in pressing engagement.
  • follower 15 is loosely mounted, at its base, on a shaft 17 connected to side plate 6, and has a V-shaped arm 18 secured thereto.
  • a screw 21 threadedly engaged in a bent portion 18b of arm 18 is maintained in pressing engagement with the lower edge of follower 15 by the bias of spring 19, so that follower 15 tends to pivot clockwise about shaft 17.
  • Two support arms 22, forming a pair, are secured at their bases to shaft 17 and support, at their free ends; and through shafts, an impression cylinder 23 for pressing a copy sheet against cylinder 1.
  • the support arms 22 are substantially integral with arm 18 through being connected to shaft 17, and thus impression cylinder 23 is biased by spring 19 to pivot clockwise about the axis of shaft 17.
  • the left end of follower 15 is formed with a projection 15a against which a bent portion 24a, formed in a shorter arm of a detector 24, is positioned, as best seen in FIG. 4.
  • the left end of follower 15 is also formed with an offset portion 15b engaged by the free end 24b of a longer arm of detector 24.
  • Detector 24 is pivotally mounted on a shaft 25 supported in a side plate 6, and biased counterclockwise by a spring 26 connected between the detector and a side plate 6.
  • a copy sheet detecting rod 27 has its base secured to the shorter arm of detector 24, and has its free end portion extending between copy sheet guide plates 28 and 29.
  • the free end portion 270 of rod 27 pivots clockwise about shaft 25 as a copy sheet moves through guide plates 28 and 29.
  • a large number of copy sheets 32 are stacked on a copy sheet feed tray 31, and a copy sheet feed roller 33 is maintained in pressing engagement with the uppermost copy sheet.
  • Feed roller 33 is mounted on a shaft 34 connected to the free ends of supports 35 whose bases are supported on a shaft 36 mounted in side plate 6.
  • a gear 38 is mounted on shaft 34 and connected thereto through a 1-way clutch 37, gear 38 meshing with an idler gear 39, supported by supports 35, meshing with a segmental gear 41 supported by shaft 36.
  • Segmental gear 41 has an arm 41a to which there is connected, through a pivot 43, one end of a connecting rod 42 whose other end is connected by a pivot 45 to a pivotal arm 44, as shown in FIG. 3.
  • the base of arm 44 is secured to a shaft 46 supported in side plate 6, and a spring 47 is connected between a side plate 6 and the free end of pivotal arm 44.
  • Another segmental gear 48 is mounted on shaft 46 so as to be fixed relative to arm 44, and a roller 49 mounted on a pivot on an arm 48a of gear 48 is biased by spring 47 to press against the periphery of a copy sheet feed cam 51 mounted on shaft 4 of cylinder 1. Feed cam 51 is urged to rotate clockwise about shaft 4 through a reverse gearing, in the same manner as cam 14 is actuated and as described with reference to FIG. 1.
  • a pinion 49a is maintained in mesh with segmental gear 48, and is mounted on a shaft 52 to which it is con nected through a one-way clutch 50.
  • a delivery roller 53 is secured on shaft 52, and another delivery roller 54 forming a pair with roller 53 is positioned above the latter to bear thereagainst under gravity bias, as shown in FIG. 2.
  • One-way clutch 37 shown in FIG. 2, is effective to transmit torque to copy sheet feed roller 35 only when gear 38 rotates counterclockwise or when segmental gear 48 of FIG. 3 pivots clockwise, and does not transmit a torque when gear 38 rotates clockwise.
  • one-way clutch 50 shown in FIG. 3, is effective to apply torque only when segmental gear 48 pivots counterclockwise, so as to preclude simultaneous rotation of copy sheet feed roller 35 and the pair of delivery rollers 53, 54.
  • an actuating member 55 is secured to shaft 36 mounting support 35, which is shown in FIG. 2.
  • a bent portion 57a of a charging member 57 is held against a screw 56 threadedly mounted on a bent portion 55a on the lower edge of actuating member 55.
  • Charging member 57 is supported by a shaft 58 connected to a side plate 6.
  • a first locking member 59 has its base pivotally connected to shaft 58, and a compression spring 61 is secured to a projection 59a of locking member 59 and to the right end portion of charging member 57.
  • Another bent portion 57b of charging member 57 is biased by spring 61 to press against the upper edge of first locking member 59.
  • a drive member 62 is fonned with a bent portion 62a locked by a hook 59b of locking member 59, and is secured to a shaft 63 connected to a side plate 6.
  • Drive member 62 is biased in a counterclockwise direction by a spring 64 secured to an arm 62b of drive member 62 and to a side plate 6.
  • a roller 65 mounted at the right end of drive member 62, is biased against copy sheet feed cam 51 by spring 64.
  • a feed pawl 66 is mounted on a pivot 67 connected to am 62b of drive member 62, and spring biased, by a spring which has not been shown, to pivot clockwise about pivot 67.
  • Feed pawl 66 is maintained in engagement with a ratchet wheel 68 mounted on a shaft 69 connected to side plate 6, and maintained in meshing engagement with a stopper pawl 68a for preventing reverse rotation of the ratchet wheel.
  • Drive member 62 is oscillated about shaft 63 in a manner described hereinafter and,due to this oscillation of member 62, feed pawl 66 angularly displaces ratchet wheel 68 clockwise.
  • a gear 71 is secured to shaft 69 mounting ratchet wheel 68, as best seen in FIG. 2, and meshes with a rack 31a mounted on copy sheet feed tray 31 so as automatically to lift copy sheet feed tray 31 by the clockwise angular displacement of ratchet wheel 68.
  • ratchet wheel 68 can also be operated manually from the outside, so that copy sheet feed tray 31 can be lifted manually as well as automatically.
  • an ink supply command lever 72 is secured to shaft 63 mounting drive member 62, and has attached to its free end a pin 72a which presses against a side edge 74a of a second locking member 74, supported by a shaft 73 connected to side plate 6, as shown in FIG. 1.
  • Locking member 74 is biased to pivot about shaft 73 by a spring 75 secured to member 74 and to side plate 6.
  • Locking member 74 has one end portion thereof formed with an offset portion 74b, adapted to be engaged by a bent portion 760 of an actuation member 76.
  • Actuation member 76 is supported by a shaft 77 mounted in a side plate 6, and biased counterclockwise about shaft 77 by a spring 78 having one end secured to a side plate 6 and the other end secured to member 76.
  • Member 76 has an arm 76c whose end is positioned so that actuation member 76 moves in slaved relation when follower pivots about shaft 17. Normally, ac-
  • tuation member 76 is locked against movement, by second locking member 74.
  • Hook Member 76 has another arm 76b whose free end is connected to the base of a hook member 81 by a pivot 82.
  • Hook member 81 has a short arm 81a extending to the left and having its lower end engaging a pin 83a secured to an ink supply regulating lever 83 pivotally supported by shaft 77.
  • Characters 84 indicating the quantity of the ink supply or the rate of supply, are printed on an arcuate portion 83b of ink supply regulating lever 83, and can be viewed througlina window 85 formed in a side plate 6.
  • An arcane s of 83c is formed in amns'sanssh 83b of lever 85, and is part of a circle whose center is at shaft 77.
  • Slot 83c restricts the range of movement of lever 83, by virtue of a stop 86 secured to the inner surface of a side plate 6 and extending through slot 83 and provided with a flush spring 87 pressing against lever 83 with a suitable resilient force to prevent inadvertent displacement of lever 83 from a position in which it has been set.
  • a spring 91 is connected between hook member 81 and the lower end of an operation member 89 supported on a shaft 88 mounted on side plate 6
  • Spring91 biases hook member 81 to pivot counterclockwise about shaft 82.
  • Operation member 89 carries a pin 89a which is engageable by hook 81b of book member 81.
  • hook member 81 pivots about shaft 77 together with its shaft 82, it engages and moves pin 89a so as to move operation member 89 clockwise about shaft 88.
  • a roller 90 mounted on the back surface of member 89 and engaged loosely between flanges 92a and 92b on a pin or shaft 92 of ink supply pump 13.
  • operation member 89 pivots about shaft 88 to reciprocate shaft 92 horizontally, a quantity of ink is delivered from ink supply pump 13 to supply line 12 arranged in the vicinity of the periphery of printing cylinder 1.
  • a locking member 93 engages an offset portion 440 at the free end of arm 44, to prevent pivoting of arm 44 and segmental gear 48 which is substantially fixed with respect to arm 44.
  • the force with which locking member 93 engages offset portion 44a of arm 44 is reduced, thus unlocking segmental gear 48.
  • Unlocking of gear 48 occurs when copy sheet feed cam 51 rotates angularly in the direction of the arrow and roller 49 of gear 48 rides on a protuberance 51c of cam 51, or when arm 44 is released from engagement with locking member 93.
  • roller 16 of'follower 15 engages minor diameter portion 14b of cam 14, due to rotation of cam 14 clockwise as viewed in P16. 1, support 22 which is substantially fixed with arm 18 pivots, as shown in FIG. 5, under the bias of spring 19.
  • impression roller 23 presses the copy sheet, delivered by rollers 53 and 54 of FIG. 2, against the stencil copy of an original mounted on endless screen 3 so as to make a copy of the latter, while roller 16 of follower 15 is engagement with minor diameter portion 14b of cam 14, the copy sheet is printed and, when printing is finished, roller 16 rides on the major diameter portion 14a again and is moved outwardly permitting follower 15 to pivot counterclockwise.
  • This pivoting of follower 15 releases impression roller 23 from engagement with printing cylinder 1 and restores the impression roller to the original positon shown in F10. 1.
  • the operation of pivoting impression roller 23 about shaft 17 into engagement with cylinder 1 is performed each time one copy sheet is fed, and is repeated until copy sheet feed is stopped when the printing is completed.
  • This pivotal movement of member 59 takes place when the force with which hook 59b of locking member 59 engages bent portion 62a of drive member 62 is reduced. More specifically, when roller 65 of member 62 rides on protuberance 51c of feed cam 51, to pivot slightly in a clockwise direction, and the bias of spring 64, which causes bent portion 62a to engage hook 59b, is reduced, first locking member 59 pivots counterclockwise under the bias of spring 61, thereby releasing drive member 62 from engagement therewith.
  • drive member 62 pivots about shaft 63 counterclockwise so that roller 65 comes into engagement with minor diameter portion 51b and major diameter portion 51a in succession. While this pivotal movement takes place, ratchet wheel 68 is angularly displaced by pawl 56 in a clockwise direction, and rotates gear 71, shown in FIG. 2, which is substantially fixed with ratchet wheel 68, so that copy sheet feed tray 31 is moved upwardly. Such upward movement of the feed tray occurs each time about 10 copy sheets are reduced or removed from the stack of copy sheets.
  • ink supply command lever 72 which is substantially fixed with member 62, also pivots counterclockwise. Slightly before this pivotal movement takes place, roller 16 of follower 15, shown in FIG. 1, is moved outwardly by protuberance 14c ofcam 14 and actuation member 76 pivots slightly in a clockwise direction about shaft 77. As a result of this, a gap is formed between offset portion 74b of first locking member 74 and bent portion 760 of the actuation member, so that the force with which these parts press against each other is reduced. If the counterclockwise pivoting of command lever 72 takes place when this condition prevails, first locking member 74 is moved in a clockwise direction about shaft 73 against the bias of spring 75.
  • actuation member 76 when no copy sheet is fed, actuation member 76 is not rendered operative in spite of the operation of command lever 72, because follower 15 is held against movement by detector 24, as shown in FIG. 4. In this case, actuation member 76 only moves between the solid line position and the dash and dot line position shown in FIG. 4, as actuation cam 14 rotates and does not perform an ink supply operation subsequently to be described. As a result, when the ink supply command lever 72 is made inoperative as tray 31 is moved upwardly consecutively, either automatically or manually at the time the stack of copy sheets 32 is placed on tray 31, no ink is supplied unnecessarily to printing cylinder 1.
  • hook member 81 pivotally connected at its base to the free end of arm 76b, pivots counterclockwise about shaft 77. Since hook member 81 is pivotal with respect to actuation member 76, it is pivoted counterclockwise about shaft 82 by the bias of spring 91. The amount of pivotal movement of hook member 81 with respect to actuation member 76 is determined by the provision of pin 83a of regulating lever 83, and the angle through which shaft 82, pivotally supporting hook member 81, rotates about shaft 77.
  • the amount of pivotal movement is equal to the amount of pivotal movement of hook member 81, which takes place when regulating lever 83 is pivoted clockwise through an angle through which actuation member 76 pivots when actuation member 76 is held in its position shown in FIG. 1. If the pivotal movement of hook member 81 about shaft 77, caused by the counterclockwise pivoting of actuation member 76, is considered to be its movement around shaft 77, then the pivotal movement of member 81 about shaft 82 is considered its pivoting about its own axis. Hook member 81 thus moves, in a compound motion which combines a movement around shaft 77 and the movement on its own axis about shaft 82, when actuation member 76 executes a pivotal movement.
  • hook 81b of member 81 would not move pin 89a of operation member 89, but would slip out of engagement therewith, so that operation member 89 would not be pivoted about shaft 88. It will be understood that the lower edge of short arm 81a of hook member 81 is maintained pressed against pin 83a by the bias of spring 91.
  • operation member 89 is adapted to move shaft 92 of ink supply pump 13 linearly, so as to deliver ink to the ink supply line 12 shown in FIG. 1.
  • Operation member 89 can be actuated by manually operating an operation handle 89b, or can be automatically pulled and moved by hook member 81 during pivoting of the latter.
  • regulating lever 83 When regulating lever 83 is set at the zero position, hook 81b of member 81 does not catch hold of pin 89a, as mentioned, in spite of the pivotal movement of the hook member, so that operation member 89 is not actuated and accordingly no ink is supplied to cylinder 1.
  • ink supply regulating lever 83 is pivoted clockwise, in FIG. 6, to set the lever at any level within the range of the characters 84, then hook member 81 pivots counterclockwise about shaft 82 is slaved relation to the movement of pin 83a of lever 83. As a result, the distance between hook 81b of member 81 and shaft 77 is slightly reduced. If an ink supply command is given to command lever 72 at this time, and actuation member 76 pivots counterclockwise, then a front edge 81c of hook member 81 is brought into abutting engagement with pin 890 during its complex movement.
  • Hook member 81 which is prevented from completing its movement on its own axis about shaft 82, moves upwardly and leftwardly substantially in linear motion while it pivots around shaft 77 or while operation member 76 pivots further. That is, hook member 81 moves in a complex movement comprising a movement around shaft 77 and a counterclockwise movement about its own axis on shaft 82, in the same manner as when operation lever 83 is set at the zero position, until front edge 81c abuts pin 89a and the movement of member 81 about its own axis is thereby prevented. However, after abutment of front edge 810 with pin 89a occurs, hook member 81 moves leftwardly and upwardly substantially in linear motion, while moving slightly clockwise about shaft 82, until hook 81b engages pin 89a.
  • the ratio of the pivotal movements of hook member 81 around shaft 77 and about its own axis on shaft 82, to the linear movement thereof, is determined by the level at which regulating lever 83 is set. If the supply of ink is set at a lower level, the pivotal movements of hook member 81 will be relatively large and the linear movement thereof will be relatively small in magnitude. If the supply of ink is set at a higher level, the pivotal movements of member 81 will be relatively small and the linear movement thereof will be relatively large in magnitude.
  • FIG. 7 shows regulating lever 83 set at the highest level in the range of characters 84.
  • actuating member 76 When actuating member 76 is actuated to pivot from the solid line position to the dash and dot line position 76A, hook member 81 moves substantially in linear movement to cause hook 81b to engage pin 89a of operation member 89, as shown in dash and dot lines.
  • Linear movement of hook member 81 always produces a gap between the lower edge of short arm 81a and pin 83a of regulating lever 83.
  • the dimension of this gap is directly related to the quantity of ink supplied, as will be described. It will be evident that the dimension of the gap is proportional to the level at which regulating lever 83 is set.
  • lever 83 When lever 83 is set at zero, short arm 81a and pin 83a merely move slightly in sliding motion relative to each other, while being maintained in engagement with each other, as explained with reference to FIG. 6.
  • roller 16 of follower 15, shown in FIG. 1 When roller 16 of follower 15, shown in FIG. 1, is released from engagement with minor diameter portion 14b of cam 14 and rides on major diameter portion 14a again, and its shaft 79 is moved outwardly from the dash and dot line position to the solid line position shown in FIG. 7, actuation member 76 is pivoted clockwise against the bias of spring 78. During this latter pivotal movement, hook member 81 pulls pin 89a downwardly from the dash and dot line position C to the solid line position, as shown in FIG. 8. Consequently, operation member 89 is pivoted clockwise about shaft 88 and pulls shaft 92 of pump 13 horizontally, as illustrated in FIG. 8, to deliver automatically a quantity of ink to ink supply line 12, shown in FIG. 1.
  • the quantity of ink delivered to supply line 12 is discharged through the small openings 12a onto the periphery of cylinder 12.
  • hook member 81 moves rightwardly and downwardly in linear motion, as shown, when actuation member 76 has pivoted from the dash and dot line position to the solid line position and operation member 89 has moved from its position in FIG. 7 to its position in FIG. 8, with a result that the lower edge of short arm 81a is brought into abutment with pin 83a of regulating lever 83.
  • regulating lever 83 is set at substantially its highest level, so that book member 81 moves substantially linearly when actuation member 76 is pivoted. Because of this, the gap between the lower edge of short arm 81a and pin 83a becomes a maximum in the position shown, and operation member 89, which is pulled until short arm 81a abuts pin 83a, supplies a maximum quantity of ink in the position of the part shown in FIG. 8.
  • regulating lever 83 is set at a suitable level by pivoting the same counterclockwise from its position shown in FIG. 7, then the gap between short arm 81a and pin 830, formed when hook 81b of member 81 catches pin 89a, is reduced. Accordingly, short arm 81a is abutted against pin 83a before hook member 81 moves operation member 89 to its position shown in FIG. 8. As a consequence, operation member 89 is pivoted in an amount corresponding to the position at which ink supply regulating lever 83 is set, and actuates ink supply pump 13 accordingly.
  • first locking member 59 shown in FIG. 3, is actuated and unlocks drive member 62 when feed roller 33 moves downwardly a predetermined amount as a result of a decrease in the number of copy sheets 32 on tray 31.
  • An ink supply command signal is produced as drive member 62 executes a pivotal movement for lifting feed tray 31, and this signal actuates ink supply command lever 72 so as to render the ink supply mechanism operative. Thereby, a suitable quantity of ink is supplied to the printing cylinder.
  • An ink supply device in combination with a mimeographing machine having a printing cylinder, a tray supporting a stack of copy sheets, an impression roller operable to press copy sheets against the printing cylinder, and sheet feeding means operable to feed copy sheets from the stack between the impression roller and the printing cylinder, said device comprising, in combination, an ink supply line adjacent said cylinder to supply ink thereto; an ink supply pump operable to supply ink to said supply line; an operation member operable to actuate said pump; a hook member operable to engage and actuate said operation member to actuate said pump; lock means normally locking said hook member against movement; hook member operating means operable in accordance with operation of said printing cylinder to actuate said hook member, only when said hook member has been released by said lock means, to actuate said operation member to actuate said pump; and means operable, each time the stack height has been reduced by a predetermined number of sheets, to release said lock means from said hook member for one such actuation of said pump and then to reengage said
  • said hook member operating means comprises an actuation cam rotatable in accordance with rotation of said printing cylinder, a pivotally mounted follower pivoted by said cam, a pivotally mounted actuation member pivotal by said follower, and a locking member providing for pivotal movement of said actuation member when the stack height has been reduced by said predetermined number of copy sheets.
  • An ink supply device in combination with a mimeographing machine having a printing cylinder, a tray supporting a stack of copy sheets, an impression roller operable to press copy sheets against the printing cylinder, and sheet feeding means operable to feed copy sheets from the stack between the impression roller and the printing cylinder, said device comprising, in combination, an ink supply line adjacent said cylinder to supply ink thereto; an ink supply pump operable to supply ink to said supply line; an operation member operable to actuate said pump; a hook member operable to engage and actuate said operation member to actuate said pump; lock means operable to lock said hook member against movement when the copy sheet stack has a predetermined height, said lock means being releasable from said hook member after the stack height has been reduced by a predetermined number of copy sheets; hook member operating means operable in accordance with operation of said printing cylinder to actuate said hook member; said hook member operating means comprising an actuation cam rotatable in accordance with rotation of said printing cylinder, a pivotally
  • said regulating member comprises a lever pivoted intermediate its ends, said pin being mounted at a first end of said lever; the opposite end of said lever having an arcuate extension formed with an arcuate slot; and a fixed pin engaged in said slot and limiting angular movement of said regulating member; said arcuate extension carrying indicia arranged along said slot.
  • An ink supply device in combination with a mimeographing machine having a printing cylinder, a tray supporting a stack of copy sheets, an impression roller operable to press copy sheets against the printing cylinder, and sheet feeding means operable to feed copy sheets from the stack between the impression roller and the printing cylinder, said device comprising, in combination, an ink supply line adjacent said cylinder to supply ink thereto; an ink supply pump operable to supply ink to said supply line; an operation member operable to actuate said pump; a hook member operable to engage and actuate said operation member to actuate said pump; lock means operable to lock said hook and having one arm operatively connected to said pump; said hook member comprising a pivotally mounted lever having a hook on its free end; said operation member carrying a pin engageable by said hook; and spring means interconnecting the other arm of said operation member and said hook member.

Landscapes

  • Sheets, Magazines, And Separation Thereof (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Printing Methods (AREA)
  • Screen Printers (AREA)
US00166077A 1970-07-31 1971-07-26 Ink supply device for mimeographing machine Expired - Lifetime US3749009A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45067579A JPS5110133B1 (ja) 1970-07-31 1970-07-31

Publications (1)

Publication Number Publication Date
US3749009A true US3749009A (en) 1973-07-31

Family

ID=13348965

Family Applications (1)

Application Number Title Priority Date Filing Date
US00166077A Expired - Lifetime US3749009A (en) 1970-07-31 1971-07-26 Ink supply device for mimeographing machine

Country Status (5)

Country Link
US (1) US3749009A (ja)
JP (1) JPS5110133B1 (ja)
DE (1) DE2136093C3 (ja)
DK (1) DK130057B (ja)
GB (1) GB1358870A (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064804A (en) * 1975-06-26 1977-12-27 Addressograph Multigraph Corporation Duplicator and method of duplicating
US4084508A (en) * 1975-08-18 1978-04-18 Ricoh Company, Ltd. Offset printing machine comprising improved control mechanism
US5771800A (en) * 1991-05-14 1998-06-30 Riso Kagaku Corporation Ink supply control device for a stencil printing machine
US6283021B1 (en) * 1999-09-17 2001-09-04 Riso Kagaku Corporation Stencil making and attaching method of printing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064804A (en) * 1975-06-26 1977-12-27 Addressograph Multigraph Corporation Duplicator and method of duplicating
US4084508A (en) * 1975-08-18 1978-04-18 Ricoh Company, Ltd. Offset printing machine comprising improved control mechanism
US5771800A (en) * 1991-05-14 1998-06-30 Riso Kagaku Corporation Ink supply control device for a stencil printing machine
US6283021B1 (en) * 1999-09-17 2001-09-04 Riso Kagaku Corporation Stencil making and attaching method of printing device

Also Published As

Publication number Publication date
JPS5110133B1 (ja) 1976-04-01
DE2136093A1 (de) 1972-02-10
DE2136093C3 (de) 1974-10-03
DK130057C (ja) 1975-07-21
DE2136093B2 (de) 1974-03-07
GB1358870A (en) 1974-07-03
DK130057B (da) 1974-12-16

Similar Documents

Publication Publication Date Title
US3749009A (en) Ink supply device for mimeographing machine
US3765327A (en) Dual feeding printing press
GB729797A (en) Improvements in or relating to printing mechanism
US4037535A (en) High speed printing apparatus
US3724839A (en) Copy sheet feed tray raising and lowering device for duplicator or the like
US4084508A (en) Offset printing machine comprising improved control mechanism
US2539382A (en) Sheet detector control mechanism for printing presses
US2795186A (en) Value printing from coplanar type
US1472466A (en) Mechanism for feeding tags, cards, etc.
US2165232A (en) Paper feeding mechanism
US3756151A (en) Compensating platen for printing machines
US3693543A (en) Imprinting mechanism
US2667831A (en) Dating machine
US2900898A (en) Arrangement for printing with a numbering frame in a high-speed cylinder press
US2261913A (en) Printing press
US4027588A (en) Control mechanism for an offset printing machine
US364671A (en) Printing-machine
US1593370A (en) Inking attachment for use with type duplicating or like printing machines
US1300289A (en) Tripping mechanism for rotary printing-presses.
US2679799A (en) Paper feed mechanism for duplicating machines and the like
US2156371A (en) Line spacing mechanism
US2925032A (en) Rotary offset printing machine
US2156032A (en) Delivery table mechanism for printing presses
US2184746A (en) Typewriting machine
US774912A (en) Printing-machine.