EP0178112A2 - Procédé et dispositif d'encrage dans une machine pour imprimer au tampon - Google Patents

Procédé et dispositif d'encrage dans une machine pour imprimer au tampon Download PDF

Info

Publication number
EP0178112A2
EP0178112A2 EP85307001A EP85307001A EP0178112A2 EP 0178112 A2 EP0178112 A2 EP 0178112A2 EP 85307001 A EP85307001 A EP 85307001A EP 85307001 A EP85307001 A EP 85307001A EP 0178112 A2 EP0178112 A2 EP 0178112A2
Authority
EP
European Patent Office
Prior art keywords
printing plate
ink
doctor blade
doctoring
printing
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.)
Granted
Application number
EP85307001A
Other languages
German (de)
English (en)
Other versions
EP0178112B1 (fr
EP0178112A3 (en
Inventor
Joji Tobita
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.)
Daiichi Mecha Tech Corp
Original Assignee
Daiichi Machinery Service 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 Daiichi Machinery Service Co Ltd filed Critical Daiichi Machinery Service Co Ltd
Priority to AT85307001T priority Critical patent/ATE49535T1/de
Publication of EP0178112A2 publication Critical patent/EP0178112A2/fr
Publication of EP0178112A3 publication Critical patent/EP0178112A3/en
Application granted granted Critical
Publication of EP0178112B1 publication Critical patent/EP0178112B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F1/00—Platen presses, i.e. presses in which printing is effected by at least one essentially-flat pressure-applying member co-operating with a flat type-bed
    • B41F1/26—Details
    • B41F1/40—Inking units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • B41F17/001—Pad printing apparatus or machines

Definitions

  • This invention relates to a process and an arrangement for inking and doctoring a printing plate for use in a pad printing machine.
  • the invention concerns a process and arrangement where ink is applied to a design provided on a printing plate, the plate is doctored by a suitable doctor blade and then ink is picked up from recessed parts of the printing plate by means of a pad provided as a part of the printing machine.
  • a printing plate having a design or pattern etched therein usually is mounted within an ink tray, a doctor blade being arranged to scrape excess ink off the surface of the plate and so to leave ink in the racessed parts of the plate.
  • the prior arrangements generally have been of one of two types.
  • the ink tray is fixed while the doctor blade and so on are arranged to be movable horizontally over the surface of the plate.
  • the doctor blade and so on are fixed, and the ink tray is moved horizontally below the blade.
  • These arrangements both require the ink tray to be open-topped, so that thinners or other components of the ink evaporate over a period of time.
  • Con- sequentt y if printing is to be continued for some time, the ink must appropriately be replenished for example by means of an automatic thinners adding device. Also, foreign matter may easily fall into the ink tray and so contaminate the ink.
  • a further problem with the known arrangement is that the two steps, of doctoring the printing plate and of reapplying the ink, are both necessary on each cycle of the printing operation and so it has been difficult to accomplish continuous printing operation at a relatively high speed.
  • an inking and doctoring process for a pad printing machine in which ink is applied to a design provided on a printing plate, the plate is doctored and then ink is picked up from recessed parts of the printing plate by means of a pad provided as a part of the printing machine, which process is characterised by the cyclic performance of a first step of relatively rotating the printing plate and a doctor blade to effect the doctoring of the plate, and a second step of picking up ink from the printing plate by the printing machine pad while the doctor blade is at least substantially in a state of rest
  • the relative rotation between the printing plate and the doctor blade either may be performed stepwise with the rotation each time being in the same sense, or may be performed in a back-and-forth manner.
  • the doctor blade may be maintained fixed whilst the printing plate is rotated, or the printing plate may be maintained stationary whilst the doctor blade is moved rotatively in a back-and-forth manner.
  • An advantage of the process of this invention is that re-inking using a separately movable ink applicator may not be necessary on each printing cycle. This allows the process to be performed at a relatively high speed: Moreover, the printing plate may have more than one printing area which areas are successively doctored, so permitting printing at a high rate.
  • an inking and doctoring arrangement for a pad printing machine including an ink tray in which is mounted a printing plate and a doctor blade arranged to scrape ink off the upper surface of the printing plate, characterised in that there is provided a drive device adapted to cause relative rotational movement between the printing plate and the doctor blade to effect doctoring of the plate, and in that an ink tray cover is disposed over the ink tray to minimise evaporation of ink components.
  • the portion of the ink tray containing the ink is kept almost completely closed and it is enough that only a part of the ink tray that is left open to allow a printing pad to descend to pick up ink in the design to be printed, so that components of the ink (such as thinners) can largely be prevented from evaporating. Moreover, the probability of foreign matter entering the ink is much reduced.
  • the doctor blade For a case where the relative rotation is performed stepwise and in the same sense, it is preferred for the doctor blade to be shaped to define a closed area (such as a circular area) within which area a design on the printing plate to be printed may lie, doctoring taking place as that design moves under the blade.
  • a closed area such as a circular area
  • two doctor blades may be provided, arranged alternately to contact the printing plate, depending upon the sense of relative movement between the doctor blades and the printing plate.
  • known inking part of a pad printing machine comprises an ink tray 1 in which is placed a printing plate 2, a doctor blade 3 being arranged to scrape ink off the surface of the plate and an ink return device 4 being arranged to reapply ink to the whole surface of the plate.
  • the inking part may be arranged in one of two ways. In one, the ink tray is fixed while the doctor blade and so on are arranged to be horizontally movable. In the other, the ink tray is arranged to be horizontally movable while the doctor blade and so on are stationary. In either case, the ink is scraped off the plate by means of the doctor blade 3 as the doctor blade 3 moves to the right (as viewed in Figure 1) relative to the ink tray and then is returned or reapplied to the surface of the plate when the ink return device 4 moves to the left
  • this inking part has the disadvantage that thinners for the ink evaporates in time, so necessitating the use of an automatic thinners adding device. In addition to that, since the two processes of doctoring and ink return are absolutely necessary, it has been difficult to accomplish continuous printing at a high speed.
  • Figure 2 shows a known alternative doctoring arrangement, to prevent the evaporation of the thinners.
  • the ink is kept within a completely closed ink pot 5 disposed over the plate 2.
  • This arrangement can however be used only with very flat printing plates and so is practical only with small print areas.
  • a base plate 10 is suitably mounted on the body of a pad printing machine (not shown).
  • An ink tray cover 12 is provided with an ink supply port 6 and a doctor blade insertion port 12-1 and is secured to the upper part of an ink tray 13 by means of carrying arms 7 which are pivotally attached to respective supports 9.
  • Each of the carrying arms 7 is fixed in a predetermined position by a screw 8 and is arranged to be slidable vertically and rotatable about a vertical axis to facilitate removal and attachment of the ink tray cover 12.
  • the ink tray 13 is mounted on an index drive 11 and is arranged to be rotationally advanced stepwise. In the contact region between the ink tray 13 and the ink tray cover 12 is arranged a Ping-shaped low-friction packing material 14.
  • a plate 18 is fixed in position by means of screws 17 within the ink tray 13.
  • a thin-band doctor blade 16 is mounted on a doctor blade holder 20 and is arranged to come into contact with the upper surface of the plate 18 through the doctor blade insertion port 12-1.
  • the blade 16 is secured to the ink tray cover 12 by means of doctor blade holder supports 19.
  • An ink guide 15 is attached to the lower surface of the ink tray cover 12 and is thus arranged to bring ink back to the middle part of the ink tray when the ink tray rotates.
  • a clearance of about 0.5 to 1.0 mm is provided between the lower edge of the ink guide and the upper surface of the plate 18.
  • Figures 5(a) and (b) show a doctor blade holder 20 which has a cylindrical shape, but the doctor blade holder 20 may of course have a square shape or may have in combination a linear blade and a cylindrical blade formed to prevent the evaporation of thinners from the ink, as shown in Figure 7.
  • pins 22, provided at both ends of the doctor blade holder, are received in and connected to the doctor blade holder support 19.
  • a rose joint 23 or the like is preferably used to receive the pins 22.
  • the index drive is arranged to have four steps.
  • the number of steps is not limited to four.
  • a rotary stepwise feeding device is disposed to be associated with the doctor, and, after the ink on the design part A of a plate which is arranged to be stationary is picked up by the pad, the doctor is arranged to come back, being caused to complete one tum by the rotary feeding device.
  • the printing operation also can be carried out in the same manner in this case.
  • Two units of the above-stated rotary stepwise feeding device may be arranged, one associated with the doctor and the other with the printing plate.
  • the index drive 11 shown in Figure 3(b) may be replaced with a suitable back-and-forth rotating device such as an air roll-back table.
  • the doctor part should be modified as shown in Figures 7(a) and (b).
  • a cylindrical part 27 is arranged either to rest on the plate 18 by its own weight or to be carried by the ink tray cover 12 to leave a clearance of about 0.5 mm between the plate and the cylindrical part 27.
  • the cyiindrical part 27 is thus arranged to prevent the thinner of the ink from evaporating.
  • the position of the cylindrical part 27 is defined by stops 26.
  • ink guides 15-1 and 15-2 are arranged to move upward or downward concurrently with the doctor blades 25 and 24, so that the ink can be kept at uniform thickness over the upper surface of the plate.
  • the ascent and descent of these doctor blades 24 and 25 and the ink guides 15-1 and 15-2 can be accomplished by some suitable means such as an air cylinder or the like.
  • the plate or the doctor blade is arranged to be moved either in a stepwise rotating manner or in a back-and-forth rotating manner.
  • a printing operation in accordance with the invention can also be carried out in the following manner.
  • Different designs may be etched into the design parts of the plate.
  • a plurality of vertically movable pads may be mounted on a stepwisely rotatable index device.
  • a number of different designs equal to the number of steps, can be printed one after another.
  • the use of a computer control arrangement for both the index drives arranged for the plate and the pad permits selection of any desired design.
  • Such an arrangement is advantageous for a printing line for printing many different kinds of printed matter running at random, as well as for printing various kinds of printed matter running in small quantities, because no resetting work is required by each change of the printed matter.
  • Figure 8 is a supplementary illustration of the printing process which may be carried out by the arrangement according to this invention, showing the three steps of doctoring, descent and ascent of the printing pad, and ink refresh.
  • the ink remaining in the recessed parts of the printing plate after the ink reception by the pad hardens to some degree because of the vaporization of the thinners and the thus hardened ink will not be restored to its initial soft state immediately when fresh ink is applied by the doctoring. Therefore in the third step no relative movement between the printing plate and the doctor blade occurs so as to allow sufficient time for the hardened ink to be restored to its initial fresh state by virtue of the solvent action of the thinners in the fresh ink.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Methods (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Rotary Presses (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Electronic Switches (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP85307001A 1984-10-04 1985-10-01 Procédé et dispositif d'encrage dans une machine pour imprimer au tampon Expired - Lifetime EP0178112B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85307001T ATE49535T1 (de) 1984-10-04 1985-10-01 Vorrichtung und verfahren zum einfaerben in eine tampondruckmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59208727A JPS6186264A (ja) 1984-10-04 1984-10-04 パッド印刷機のインキの供給・ドクタリング方法及びその装置
JP208727/84 1984-10-04

Publications (3)

Publication Number Publication Date
EP0178112A2 true EP0178112A2 (fr) 1986-04-16
EP0178112A3 EP0178112A3 (en) 1986-08-13
EP0178112B1 EP0178112B1 (fr) 1990-01-17

Family

ID=16561078

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85307001A Expired - Lifetime EP0178112B1 (fr) 1984-10-04 1985-10-01 Procédé et dispositif d'encrage dans une machine pour imprimer au tampon

Country Status (7)

Country Link
EP (1) EP0178112B1 (fr)
JP (1) JPS6186264A (fr)
KR (1) KR910000576B1 (fr)
CN (1) CN1004263B (fr)
AT (1) ATE49535T1 (fr)
DE (1) DE3575393D1 (fr)
SG (1) SG75790G (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4928587A (en) * 1988-02-26 1990-05-29 Motorola Inc. Programmable pad printer
US5052293A (en) * 1989-05-05 1991-10-01 Tampoflex Gmbh Ink container for tampon printing presses

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8607699B2 (en) * 2008-05-07 2013-12-17 Illinois Tool Works Inc. Rotating cliché pad printer
CN111300977A (zh) * 2020-04-18 2020-06-19 台州市莱恩克智能科技有限公司 一种拆卸方便的移印机底部凹版安装机构

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2205430A1 (de) * 1971-02-04 1972-08-17 Schmid, Pierre, Cormoret, Bern (Schweiz) Gerät zum Einfärben eines Druck-Klischees
EP0012934A1 (fr) * 1978-12-22 1980-07-09 Agfa-Gevaert AG Dispositif pour le transfert discontinu de matériaux liquides sur une surface à enduire, et procédé pour le fonctionnement d'un tel dispositif

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5222329U (fr) * 1975-08-04 1977-02-17

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2205430A1 (de) * 1971-02-04 1972-08-17 Schmid, Pierre, Cormoret, Bern (Schweiz) Gerät zum Einfärben eines Druck-Klischees
EP0012934A1 (fr) * 1978-12-22 1980-07-09 Agfa-Gevaert AG Dispositif pour le transfert discontinu de matériaux liquides sur une surface à enduire, et procédé pour le fonctionnement d'un tel dispositif

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4928587A (en) * 1988-02-26 1990-05-29 Motorola Inc. Programmable pad printer
US5052293A (en) * 1989-05-05 1991-10-01 Tampoflex Gmbh Ink container for tampon printing presses

Also Published As

Publication number Publication date
JPH038265B2 (fr) 1991-02-05
SG75790G (en) 1990-12-21
EP0178112B1 (fr) 1990-01-17
EP0178112A3 (en) 1986-08-13
KR910000576B1 (ko) 1991-01-26
CN1004263B (zh) 1989-05-24
JPS6186264A (ja) 1986-05-01
ATE49535T1 (de) 1990-02-15
CN85108460A (zh) 1986-05-10
DE3575393D1 (de) 1990-02-22
KR860003107A (ko) 1986-05-19

Similar Documents

Publication Publication Date Title
US4060031A (en) Printing method and apparatus for performing the printing method
US4193344A (en) Silk screen printing machine
US2659305A (en) Multicolor rotary, intaglio, letterpress, and offset printing press
US20060075908A1 (en) Apparatus for printing objects of the tablet type, in particular medical tablets and process therefor
US4370926A (en) Printing press for printing sheets of corrugated paperboard
EP0438731A3 (en) Doctor blade assembly for the inking device with circulation of ink in a rotary printing machine
EP0178112B1 (fr) Procédé et dispositif d'encrage dans une machine pour imprimer au tampon
US4841857A (en) Thin-film forming apparatus
CA1226476A (fr) Methode d'impression intaglio, et plateau encreur connexe
US4481883A (en) Low-blade inking mechanism with detachable ink duct troughs
GB2124977A (en) Printing machine
US4928587A (en) Programmable pad printer
US4545301A (en) Ink applicator for a tampon printing machine
US4738198A (en) Printing mechanism
JP2759570B2 (ja) 薄膜形成装置
EP0650162A1 (fr) Un procédé et un dispositif pour traiter des supports d'enregistrement en forme de disque
JPH0114027B2 (fr)
JP3110118B2 (ja) 小物部品の印刷装置
JPH032665B2 (fr)
US3481816A (en) Printer for tinning lines
JPH084295Y2 (ja) インキ供給ブレード
JPS6014586Y2 (ja) パツド印刷機のドクタ−装置
JP2718583B2 (ja) 印刷装置
JPH0615809A (ja) オフセット印刷装置
JP2662797B2 (ja) 印刷機のインキ装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19870211

17Q First examination report despatched

Effective date: 19880609

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 49535

Country of ref document: AT

Date of ref document: 19900215

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: ING. ZINI MARANESI & C. S.R.L.

REF Corresponds to:

Ref document number: 3575393

Country of ref document: DE

Date of ref document: 19900222

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
EPTA Lu: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 85307001.9

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20030829

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20030917

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20030924

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20030929

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20031003

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20031015

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20031024

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20031031

Year of fee payment: 19

Ref country code: DE

Payment date: 20031031

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041001

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041001

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041002

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041031

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041031

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041031

BERE Be: lapsed

Owner name: *DAIICHI MACHINERY SERVICE CO. LTD

Effective date: 20041031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050503

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20041001

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050630

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20050501

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

BERE Be: lapsed

Owner name: *DAIICHI MACHINERY SERVICE CO. LTD

Effective date: 20041031