EP1048464A1 - Druckverfahren in einer Rotationsdruckmaschine - Google Patents

Druckverfahren in einer Rotationsdruckmaschine Download PDF

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Publication number
EP1048464A1
EP1048464A1 EP00401183A EP00401183A EP1048464A1 EP 1048464 A1 EP1048464 A1 EP 1048464A1 EP 00401183 A EP00401183 A EP 00401183A EP 00401183 A EP00401183 A EP 00401183A EP 1048464 A1 EP1048464 A1 EP 1048464A1
Authority
EP
European Patent Office
Prior art keywords
printing
strip
solvent
support
fatty
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.)
Withdrawn
Application number
EP00401183A
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English (en)
French (fr)
Inventor
Jean-Luc Bercher
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1048464A1 publication Critical patent/EP1048464A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/20—Safety devices preventing damage

Definitions

  • the present invention relates to a printing process, on press rotary, improved.
  • an improvement is proposed to facilitate the operation of rotary printing presses, in particular the operation of rotary presses used to date in offset.
  • Said improvement makes it possible to remedy problems, inevitably encountered, during use, according to prior art, of this type of printing material.
  • Said improvement is all the more interesting as its field of application is vast: it can be implemented works on any type of press, as part of any printing process using, to deposit the ink on the support to be printed, a flexible material (of soft consistency) and in particular a rubberized material (such as a blanket, offset) to print any type of support, conditioned in reels: paper, cardboard Or other.
  • a large part of the printing is carried out on rotary presses, which print the support to be printed, such as paper, packaged in reels.
  • a bonding of the unwinding strip, with the start of a new support reel is generally carried out by an automatic adhesive device, known per se.
  • a new coil is thus put into service, without stopping the press.
  • photoelectric cells detect the absence of band and then cause the stop of the press.
  • the media to be printed passes between cylinders printing, at least one of which is covered with a rubber called a blanket.
  • the ink is deposited on said support by said blanket.
  • the process of the invention is a printing process, on press rotary, of a support delivered in the form of a strip from a reel.
  • Said rotary press includes a printing unit using, to deposit ink on said support, a flexible material.
  • This type of printing process is familiar to the skilled person.
  • Today it is mainly offset printing which, to deposit the ink on the support, involves a blanket. So general, the improvement within the meaning of the invention can be exploited in any context where the ink is therefore deposited on the print medium via a flexible material, and in particular a rubberized material (context limited to date to that of offset but undoubtedly called to expand in the future).
  • Said fatty solvent is deposited over the entire width of the strip in scrolling, upstream of the printing group, between said printing group and the system for supplying the latter with said support strip to be printed.
  • Said fatty solvent can be deposited on the front or / and on the back of said strip intended to be printed, usually on one side only or on both sides. In fact, all cases are possible.
  • the printing is put in double-sided work and the fatty solvent is deposited on both sides of the strip in scroll.
  • the improvement, object of the present invention is based on the concept of using the print medium itself to convey a solvent for effective cleaning of the printing unit cylinder (s) (more particularly the printing cylinder (s), blanket cylinder (s) offset), to constitute itself a cleaning tool; said support is comprising as a sponge capable of at least partially returning the solvent, with which it was impregnated upstream, during its successive passages between the cylinders of the printing unit.
  • said print medium is a good substitute for rags, sponges, textile substrates, brushes or equivalent mechanical means which should be intervene according to the prior art and this, in a completely unexpected manner.
  • the fatty solvent is advantageously deposited on a length of the strip (in movement) at least equal to the circumference of the (first) impression cylinder called to contact said strip.
  • Said cylinder can be unique or the first of n cylinders (n, integer, greater than or equal to 2) which intervene one after the other, in the printing group.
  • fatty solvent within the meaning of the invention (by intermittently, on the moving strip, over the entire width (width) of the said tape), various technologies can be implemented.
  • Said fatty solvent can in particular be deposited by spraying or by direct application, by means of minus a brush or roller.
  • the width of said deposit is adjustable, adaptable according to the width of the material to be printed.
  • said deposit is implemented by spraying, at using at least one spray nozzle.
  • the fatty solvent deposited is obviously capable of penetrating the pores of the print medium, to exert a cleaning and non-sticking action, while remaining compatible with all the packing materials of the different rollers and cylinders of a rotary press. It is advantageously a fatty solvent of the type of solvents marketed to date for washing automatic blanket offsets.
  • TECHNIWEB the use, according to the process of the invention, of mixtures of organic solvents, marketed by TECHNIWEB under the names "WEB TECHNOCLEAN” and "WEB TECHNOCLEAN P".
  • the device which is suitable for implementing the method described above includes a rotary press of the prior art with which it is associated adequate means for the intermittent deposition of the fatty solvent over the entire width of the strip in movement, for its printing.
  • Said rotary press comprises, conventionally, a group printing (including at least one plate cylinder and one blanket cylinder, associated, in offset) and, upstream of this, a system for its supply of a continuous strip of the printing medium conditioned in reels.
  • Said system includes at least one unwinder, which unrolls the reel and transmitting the unwound tape to the printing unit. It also includes, advantageously, arranged downstream of said unwinder, a debtor.
  • a debtor is a regulator of the tension of the delivered printing medium. He delivers said support at a constant rate.
  • said press rotary means for intermittently depositing (at will) a fatty solvent over the entire width of the strip to be scrolled.
  • Said means are positioned in downstream of the feed system of said rotary press (system comprising a unwinder and advantageously a unwinder and a debtor) and upstream of the group printing of it.
  • the printing medium impregnated at this level with said fatty solvent, can develop the beneficial actions described above, while limiting to maximum pollution generated.
  • the means involved in depositing the solvent can in particular consist of at least one brush or roller. It is advantageously means which are suitable for spraying said fatty solvent. So, do said means advantageously comprise at least one nozzle spraying, arranged above and / or below the strip to be scrolled and more advantageously still several spray nozzles on two booms, arranged respectively above and below said strip.
  • the so-called nozzle (s) must be suitable for spraying the fatty solvent over the entire band width. It (s) is (are) connected (s) to a device for supplying said oily solvent and subject to control means.
  • Said nozzles may also be suitable for a water spray (see above).
  • Drilled blocks can allow the distribution of different controlled fluids (solvent, water, compressed air).
  • Solenoid valves adapted to different fluids and at the frequencies used may allow said routes to be sent on demand fluids to the spray nozzles. With such a process, it is possible to do pass through each nozzle, successively or simultaneously, from 1 to 3 fluids different.
  • These solenoid valves can be managed by a PLC programmable or any other industrial computer-based system.
  • the device of the invention advantageously comprises, in a manner known per se, at the level of its system for supplying the printing unit with the printing support strip (at the level of its unwinder) an automatic device for joining by bonding of two coils, used successively.
  • an automatic device for joining by bonding of two coils used successively.
  • Said system 1 comprises an unwinder 1a and a debtor 1b.
  • Said unwinder contains an automatic fastening device 6 by bonding coils used successively 10,10 '.
  • FIG. 10 shows the spool of printing support being unfolding (during printing). Said coil 10 delivers the tape 20. The coil 10 ', new, will intervene when said coil 10 is exhausted.
  • Said printing unit 2 comprises two plate cylinders 2a and 2a ' and two blanket cylinders 2b and 2b '. We represented symbolically (not scale) blankets 8 intervening. On consideration of this figure, the man those skilled in the art have already understood that the printing in question is a double-sided offset printing. 5 shows a tape breakage detection cell 20.
  • a fatty solvent is uniformly sprayed, under the conditions indicated below, on either side of the 960 mm in width of the strip of paper put on to pass. It is sprayed from 10 spray nozzles, distributed uniformly on two booms, arranged 54 mm above and below the support placed to scroll. Said spray nozzles are of the H 1/8 th type - VVII-001, sold by the company SPRAYING EMANI SYSTEM (USA).
  • Solvent mixture of organic solvents, marketed under the name "WEB TECHNOCLEAN” by the company TECHNIWEB;
  • Spraying of the solvent the said solvent is sprayed for 0.8 s, under a pressure of 1.6 bar, which delivers 0.8 dl on each spray. Given the paper running speed, said 0.8 dl are distributed over a length 3.3 m of paper (this length corresponds to 5.5 revolutions of the blankets, it is symmetrically distributed on either side of the bonding joint).
  • Self-cleaning of the spray nozzles after each spraying of solvent, compressed air is delivered through the nozzles for 2 times 1 s, with a pause of 0.5 s between each time.
  • Printing is carried out with the same material, within same conditions (on the same press, operating at the same speed, (20,000 copies / hour), for the same print run, on the same print medium) as which was described above in Example 2a. However, it intervenes at each change of coil, under the conditions described in Example 1b, the fatty solvent, as also defined in said example 1b. Said solvent is sprayed on both sides for 0.7 s, under a pressure of 1.6 bar; which delivers 0.26 dl each spray. Said 0.26 dl are distributed over a length of 2.33 m paper. This length corresponds to 3.8 revolutions of the blankets, it is symmetrically distributed on either side of the bonding joint. We implement, after each spraying of solvent, a self-cleaning sequence of the spraying, as described in Example 1b.
EP00401183A 1999-04-30 2000-04-28 Druckverfahren in einer Rotationsdruckmaschine Withdrawn EP1048464A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9905505A FR2792873B1 (fr) 1999-04-30 1999-04-30 Procede d'impression, sur presse rotative, ameliore, presse rotative amelioree
FR9905505 1999-04-30

Publications (1)

Publication Number Publication Date
EP1048464A1 true EP1048464A1 (de) 2000-11-02

Family

ID=9545077

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00401183A Withdrawn EP1048464A1 (de) 1999-04-30 2000-04-28 Druckverfahren in einer Rotationsdruckmaschine

Country Status (2)

Country Link
EP (1) EP1048464A1 (de)
FR (1) FR2792873B1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2264521A (en) * 1939-08-09 1941-12-02 Binks Mfg Co Means for and method of timing spray operations for preventing smutting in printing presses
FR2587274A3 (fr) * 1985-09-16 1987-03-20 Mareels Gerard Dispositif antimaculant de transport de bande imprimee
FR2767498A1 (fr) * 1997-08-20 1999-02-26 Jean Emter Procede de traitement d'au moins une paire de rouleaux d'impression et dispositif pour sa mise en oeuvre

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2264521A (en) * 1939-08-09 1941-12-02 Binks Mfg Co Means for and method of timing spray operations for preventing smutting in printing presses
FR2587274A3 (fr) * 1985-09-16 1987-03-20 Mareels Gerard Dispositif antimaculant de transport de bande imprimee
FR2767498A1 (fr) * 1997-08-20 1999-02-26 Jean Emter Procede de traitement d'au moins une paire de rouleaux d'impression et dispositif pour sa mise en oeuvre

Also Published As

Publication number Publication date
FR2792873B1 (fr) 2001-07-13
FR2792873A1 (fr) 2000-11-03

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