EP0334072A2 - Dispositif de positionnement du pochoir pour aligner des feuilles dans une machine à imprimer au pochoir plat - Google Patents

Dispositif de positionnement du pochoir pour aligner des feuilles dans une machine à imprimer au pochoir plat Download PDF

Info

Publication number
EP0334072A2
EP0334072A2 EP89103701A EP89103701A EP0334072A2 EP 0334072 A2 EP0334072 A2 EP 0334072A2 EP 89103701 A EP89103701 A EP 89103701A EP 89103701 A EP89103701 A EP 89103701A EP 0334072 A2 EP0334072 A2 EP 0334072A2
Authority
EP
European Patent Office
Prior art keywords
screen printing
frame
fitting
printing frame
fitting hole
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.)
Ceased
Application number
EP89103701A
Other languages
German (de)
English (en)
Other versions
EP0334072A3 (fr
Inventor
Arno Dr.-Ing. Berger
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 EP0334072A2 publication Critical patent/EP0334072A2/fr
Publication of EP0334072A3 publication Critical patent/EP0334072A3/fr
Ceased legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/16—Printing tables
    • B41F15/18—Supports for workpieces
    • B41F15/22—Supports for workpieces for single sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0804—Machines for printing sheets
    • B41F15/0813—Machines for printing sheets with flat screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/34—Screens, Frames; Holders therefor
    • B41F15/36—Screens, Frames; Holders therefor flat

Definitions

  • the invention relates to a device for a movable screen printing frame for aligning reproductive documents in the vacuum copying frame in the stencil production and sheets on a base plate in a flat screen printing machine for the subsequent printing process.
  • the devices for the adjustment of the register ie the adjustment devices for the exact placement of the printed image on the printed matter, are of particular importance for every screen printing machine. It is fundamentally possible either to move the base plate via a device relative to the fixed screen printing frame or to move the screen printing frame and to rigidly arrange the base plate on which the sheets lie during the printing process. Mixed arrangements are also possible.
  • the adjustment devices are of particular importance for every screen printing machine because they influence the duration of the set-up time and are crucial for the precision of the registration.
  • an adjustment device for the base plate or: the screen printing frame is provided, in which three adjustment elements play eliminating pressure and tension elements are provided. This facility is very complex.
  • the screen printing frame for receiving a printing stencil is fixed in place on a stationary receiving part by means of screws, and for this purpose a support table, which is guided parallel to the receiving part, is provided for receiving a substrate to be printed.
  • a centering of the relative movement of the carrier table to the receiving part is provided on the movable carrier table by a locking stop designed as a centering pin for receiving a centering cap, while the centering cap is provided on the stationary receiving part.
  • This known centering device is used for the perfect repeatable movement of the support table, especially in automatic screen printing machines. Alignment of the screen printing frame does not take place here, since it is fixed in place and is not movable.
  • the invention has for its object to provide a simple device for a movable screen printing frame with which the registration of both the originals in the stencil production and the sheet for the subsequent printing in a flat screen printing machine using the same or the same screen printing frame is possible.
  • the set-up and fitting times should be as short as possible with a high achievable register accuracy.
  • a movable one-part or two-part dowel bar is provided with at least two dowel pins projecting upwards, that at least two along an outer frame side of the screen printing frame each a height-adjustable fitting hole receiving brackets are attached at a distance corresponding to the distance between the dowel pins on the dowel and the dowel hole block has a fitting hole on its underside for receiving the dowel pins.
  • the invention enables the use of a continuous registration system for screen printing with flat screen printing machines through the use of a movable registration bar and a movable screen printing frame with registration system. It enables the registration hole system used in the production of the original to also be used to fix the color original by means of the registration board the screen fabric during the stencil production and subsequently the sheet on the base plate, ie the printing table that is used for printing.
  • the continuous use of a fitting system increases the productivity of the work processes and the accuracy. With the invention, moiré phenomena and register differences in single-pass and multi-pass screen printing can be avoided or reduced to a minimum, and at the same time set-up times can be kept short.
  • the register accuracy that can be achieved also depends on the accuracy of the registration holes of the registration hole blocks to the registration pins of the registration strip, which should be as free of play as possible, but should still allow easy insertion and execution.
  • the invention enables that with the position and fixation of the fitting strip also contact marks on the base plate, i.e. can be fixed to the printing table.
  • a device that is simple and inexpensive to use which also uses the advantages of the passport system used in the production of the original for stencil production and for screen printing in order to obtain moiré-free, edge-to-edge screen prints in one or more colors with high accuracy of fit .
  • the conditions regarding the Accuracy in printing can be more easily met.
  • the application of the invention does not require the use of a fitting hole system in the production of reproductive templates - originals.
  • Crossover systems and visual adjustments are often used in the original production.
  • the system according to the invention can be used for the first time for printing plate production (stencils on the screen mesh) and then subsequently for printing with a virtually any pass hole system - usually with a round elongated hole system as a two-hole or three-hole system will.
  • the fitting strip can be fixed on a base plate - printing plate, printing table - for example by means of screw clamps or by means of releasable, self-adhesive adhesives or adhesive strips.
  • the dowel can also be formed in two parts, one dowel pin being arranged on each plate-shaped dowel part.
  • the device according to the invention can be used for different edge fitting systems with differently dimensioned round or elongated hole dimensions.
  • a three-length hole system based on the principle of the coordinate network plate is also possible.
  • a corresponding number of two or more brackets and fitting hole blocks with correspondingly designed fitting holes are to be provided with the fitting strip with a corresponding fitting pin arrangement.
  • the brackets can be fixed in place on the screen printing frame if there is no change in the edge fitting systems.
  • the brackets are preferably releasably attached to the screen printing frame.
  • the fitting hole block can be, for example, quadrangular in cross section, but preferably in the form of a cylinder bolt.
  • the height adjustment of the pass hole block in the bracket can be done by clamping the pass hole block by means of a screw on the bracket.
  • a screw on the bracket In order to facilitate the insertion of the fitting hole block into the holder, it is proposed to design it with a U-shaped undercut or tubular slotted cross section, with a wide opening gap running vertically continuously or with a limited length.
  • This bracket which is practically designed as a clamp, can be slightly resilient, so that a clamping effect is achieved when the fitting hole block is inserted by spreading apart. To facilitate insertion of the fitting hole block into the holder, this can also be designed with a slightly conical lowering at its upper insert.
  • the holder has a shape in the manner of a cramp, which rests on the top of the screen printing frame and partially partially protrudes from the outside and inside of the screen printing frame.
  • the bracket can be fixed on the inside of the screen printing frame using a locking screw.
  • the holder should not only be removable, but also be put back into the same position later.
  • a spacer is provided, which is assigned to one of the brackets extending along the inside of the screen printing frame and the stop end of which lies against the inside of the screen printing frame and defines a predetermined position of the holder on the screen printing frame.
  • the position of the further brackets on the screen printing frame is then determined by the fitting bar, which is also fixed in position by the first bracket. This makes it possible not only to remove the brackets, but to adjust them again at any time if necessary Put on the screen printing frame.
  • fitting hole blocks In order to be able to use differently sized fitting systems and at the same time to reduce the effort required for fitting hole blocks, it is proposed that the fitting hole blocks also be provided on the top with another fitting hole of another dimension, so that after rotation through 180 ° they can be used for a differently sized fitting system are.
  • Figure 1 shows a schematic view of the fitting device rigidly attached to the screen printing frame 1 after attaching and fixing the fitting strip 2 on the printing plate 8 of a screen printing machine, not shown. Alignment in the exact position of the fitting strip 2 is carried out by means of the brackets 3 attached to the outside 1b of the screen printing frame 1 with a fitting hole block 4 which is adjustable in height in the direction of arrow H.
  • Screen printing frames are understood to mean a square or square frame composed of metal or wood frame profiles rectangular frame, on the underside of which the screen printing fabric 9 is stretched and fixed. The template is attached and anchored to the fabric 9 in the course of the template or printing form production. As can be seen from FIGS.
  • brackets 3 with a U-shaped undercut clamp-like shape with a vertically continuous opening gap 30, for example made of metal, are rigidly fastened on the back in the region 31 to the screen printing frame 1, for example welded, glued or fastened by means of screws.
  • the brackets 3 have a vertically continuous guide bore 33 for receiving the fitting hole block 4.
  • the holder 3 or guide bore 33 can also have a different cross section.
  • the fitting strip 2, a flat, long metal strip, has on the top two or more upstanding fitting pins 21 which have a shape corresponding to the fitting hole system to be used.
  • the distance A of the dowel pins 21 of the dowel bar 2 from one another corresponds to the distance between the two brackets 3 fastened to the screen printing frame 1.
  • the distance A cannot be varied even for the dowel bar.
  • a corresponding, precisely fitting dowel hole 6 - as a round hole 6a or elongated hole or groove 6b - is formed, so that by snapping the dowel hole block onto the dowel pin 21, an exact positioning of the dowel bar 2 on the printing table in relation to the screen printing frame 1.
  • the fitting bar can be fixed on the base plate or pressure plate for the subsequent printing processes.
  • the fitting hole blocks 4 can be lifted vertically and fixed in the holder 3, for example with the screw 5, see also FIGS. 4 and 3.
  • the printing plane is indicated by the arrows A, B in Figure 1, it corresponds to the support plane of the printing sheet 10.
  • the cross section of the fitting hole block 4 is adapted to the shape of the receiving groove 33 of the holder 3, it can be conveniently e.g. be square or circular.
  • One of the two fitting hole blocks 4 expediently has a round hole 6a as a fitting hole, while the second fitting hole block has an elongated hole 6b as a fitting hole for easier insertion.
  • the type of design and attachment of the holder 3 to the screen printing frame 1 can be seen in the detail cross sections according to FIGS. 3 and 4.
  • the through screw hole 41, in which the screw 5 is guided, is formed approximately in the middle of the fitting hole blocks 4.
  • the fitting hole block 4 When the screw 5 is loosened, the fitting hole block 4 can be moved vertically up and down in the direction of the arrow H, and by fixing the screw 5, which completely penetrates the fitting hole block, the fitting hole block can be clamped to the holder 3 at a selected height.
  • the screw head is located in the area of the opening gap 30 and is therefore easily accessible.
  • FIGS. 5 to 7 show a fitting device in which the holder for the fitting hole blocks on the screen printing frame 1 can be detachably fastened and can thus be adapted to different fitting systems and dimensions.
  • the bracket 3 is designed to be placed in the manner of a cramp with the leg 32 on the screen printing frame 1 and has the vertically continuous guide bore 33 for inserting the fitting hole block 4 in the area projecting beyond the outside 1b of the screen printing frame 1.
  • the fitting hole block is cylindrical.
  • the fitting hole block is not only formed with a fitting hole 6a on the underside but also with another fitting hole 6c on the top.
  • the bracket 3 is by means of the locking screw 7 through the screw hole 72 of the bracket, which carries the rotatable disc 71 at its end, on the Screen printing frame 1 clamped on its inside 1a.
  • the brackets 3 can be arranged on the screen printing frame 1.
  • one of the brackets 3 is provided with a spacer, for example in the form of a stop bracket 34, which can be placed against a corresponding stop of the screen printing frame 1. As can be seen from FIGS.
  • the holder 3 in position I is equipped with the stop bracket 34, which with its end 34b, which can also be rounded, strikes against the inside 1a of the frame and thus fixes the position.
  • the stop 34 can be provided with an additional support bracket 34a which rests on the screen printing frame 1 and the stability of the
  • Position I of the bracket 3 with the stop 34 is fixed on the screen printing frame 1, while the position II of the second bracket 3 can be selected without a stop angle according to the distance A of the dowel pins 21 of the dowel bar 2.
  • the fitting hole block 4 has the screw hole 41, which is designed as a blind hole, approximately halfway up.
  • the screw 5, which is guided horizontally through the holder 3 from the outside, engages in the blind hole 41.
  • the passage of the screw 5 through the holder 3 is designed as a vertically extending elongated hole 35, in which the screw 5 is adjustable with a fitting hole block 4.
  • the originals punched during the original production with the passport system used can be positioned exactly on the screen fabric for the stencil production in the vacuum copier frame by means of the fitting device according to the invention and by means of the fitting strip, as a result of the maintenance of the uniform coordinate system.
  • the fitting device according to the invention can be used in particular for semi-automatic flat screen printing machines, but can also be used in automatic lay-on and pull systems.
  • the frame holder of the screen printing frame is not moved, nor is the printing table or the base plate, but the individual screen printing frames are changed.
  • each screen printing frame is equipped with a uniform coordinate system through the brackets with the fitting hole blocks, which is transmitted to the printing table via the fitting bar.
  • Both stencils and sheets are processed according to the same fitting system, whereby the originals are always aligned exactly on the screen fabric and the X-Y plane is distortion-free, i.e. precise angles, is printed.
  • the fitting system with fitting strip and brackets on the screen printing frame with fitting hole block can also be used for industrial precision printing, such as for printing electrical circuits.
  • the exact positioning of special locating pins for the base materials instead of contact marks on the printing plate can be done easily from the fitting bar or directly using the fitting hole blocks Be carried out so that the base material provided with holes is firmly anchored and precisely positioned by the locating pins on the pressure plate.
  • the spacer for the adjusted placement of the holder on the screen printing frame can be firmly connected to the holder or preferably also be made as a separate loose part. It is placed between the holder 3 and the inside 1a of the screen printing frame for repeated positioning of the holder 3 on the screen printing frame in order to fix the holder 3, e.g. screw on.
  • the separate spacer is therefore on the one hand on the holder and on the other hand on the side, i.e. right-angled frame legs of the screen printing frame.
  • the spacing of the spacer is e.g. fixed by a lower cross bar on the bracket also by cross bars, against which the bracket is pressed after being placed on the screen printing frame when screwing.
  • the spacer is variable according to the cross bars.
  • the invention it is possible to adhere exactly to the pre-angulation during the stencil production, screen moiré effects in raster screen printing are prevented, register accuracies of up to plus / minus 0.05 mm are achieved during printing. Setup times are reduced by eliminating the need to adjust the pressure plate. It is possible to print single and multi-colored originals parallel or flush to the edge of the sheet without readjusting, which makes it easier to cut the sheets later.
  • the fitting device is designed so that the brackets for the fitting hole blocks can also be retrofitted to existing screen printing frames.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Screen Printers (AREA)
EP89103701A 1988-03-19 1989-03-03 Dispositif de positionnement du pochoir pour aligner des feuilles dans une machine à imprimer au pochoir plat Ceased EP0334072A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883809321 DE3809321C1 (fr) 1988-03-19 1988-03-19
DE3809321 1988-03-19

Publications (2)

Publication Number Publication Date
EP0334072A2 true EP0334072A2 (fr) 1989-09-27
EP0334072A3 EP0334072A3 (fr) 1990-05-30

Family

ID=6350204

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89103701A Ceased EP0334072A3 (fr) 1988-03-19 1989-03-03 Dispositif de positionnement du pochoir pour aligner des feuilles dans une machine à imprimer au pochoir plat

Country Status (2)

Country Link
EP (1) EP0334072A3 (fr)
DE (1) DE3809321C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997015867A1 (fr) * 1995-10-27 1997-05-01 Stretch Devices, Inc. Reperage par aiguilles pour serigraphie
CN101947876A (zh) * 2010-08-09 2011-01-19 湖州惠盛机械有限公司 平网印花机网板与刮刀分离装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMO20050071A1 (it) * 2005-03-31 2006-10-01 Saverio Russo 'dispositivo di fissaggio di un telaio di supporto di un retino di uno schermo per serigrafia piana ad una struttura portante, particolarmente di una attrezzatura o di una macchina per la produzione dello schermo o per la serigrafia di elementi sosta
CN104494290B (zh) * 2014-12-16 2017-02-22 格力电器（中山）小家电制造有限公司 加湿器水箱丝印固定装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909116A (en) * 1956-08-09 1959-10-20 Earl D Moore Adjustable silk screen device
DE1963939C2 (de) * 1969-12-20 1982-02-04 Siebdruckgeräte von Holzschuher KG, 5600 Wuppertal Justiereinrichtung für Siebdruckmaschinen
JPS5725388B2 (fr) * 1972-07-10 1982-05-29
FR2383016A1 (fr) * 1977-03-10 1978-10-06 Cii Honeywell Bull Appareil pour appliquer au travers d'un ecran une couche de matiere pateuse sur un support
DE3152927C2 (de) * 1981-09-14 1986-06-12 Texpa Arbter-Maschinenbau GmbH, 8741 Saal Vorrichtung zum Transportieren und Ausrichten von Bogen in einer Flach-Siebdruckmaschine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997015867A1 (fr) * 1995-10-27 1997-05-01 Stretch Devices, Inc. Reperage par aiguilles pour serigraphie
US5648189A (en) * 1995-10-27 1997-07-15 Stretch Devices, Inc. Pin registration for screen printing
AU707192B2 (en) * 1995-10-27 1999-07-08 Stretch Devices Inc. Pin registration for screen printing
CN101947876A (zh) * 2010-08-09 2011-01-19 湖州惠盛机械有限公司 平网印花机网板与刮刀分离装置
CN101947876B (zh) * 2010-08-09 2015-06-03 湖州惠盛机械有限公司 平网印花机网板与刮刀分离装置

Also Published As

Publication number Publication date
DE3809321C1 (fr) 1989-06-22
EP0334072A3 (fr) 1990-05-30

Similar Documents

Publication Publication Date Title
DE69224049T2 (de) Flacher Träger für Material und Rahmen angeordnet und Verfahren zum Gebrauch
DE2653707C3 (de) Vorrichtung zum genauen visuell- manuellen Einrichten und zum Halten eines plattenförmigen Werkstücks mit lichtempfindlicher Schicht gegenüber einer oder zwei Vorlagen
DE2335075A1 (de) Siebdruckmaschine
DE2744371C3 (de) Vorrichtung zum Befestigen und Spannen von biegsamen Druckplatten
DE19814966A1 (de) Vorrichtung zum Perforieren, Rillen oder Stanzen für Mehrfarben-Bogenrotationsdruckmaschinen
DE69405994T2 (de) Klemm- und spannsystem für schablonen für siebdruckmaschinen mit drucktisch für gedruckte leiterplatten
DE102008051052A1 (de) Drucktischanordnung
EP0334072A2 (fr) Dispositif de positionnement du pochoir pour aligner des feuilles dans une machine à imprimer au pochoir plat
DE2604874C3 (de) Einrichtung zum Einpassen von Druckplatten für Offset-Rollen-Rotationsdruckmaschinen
DE19615058C2 (de) Spannvorrichtung und Schablonen für Schablonen- oder Siebdruck
DE1805204C3 (de) Anordnung zur Herstellung von Mehrfarbendrucken
DE2937880A1 (de) Lithographische druckerpresse
DE3625038A1 (de) Vorrichtung zur halterung von flachbaugruppen
DE4238800A1 (de) Verfahren zum Ausrichten von Druckplatten
EP0176091A1 (fr) Dispositif et procédé pour la fabrication de trous dans des barres profilées en matière plastique
DE833497C (de) Einpassen von Druckformen fuer mehrfarbige Arbeiten ausserhalb der Druckpresse
EP1457297B1 (fr) Dispositif de gaufrage et/ou de découpe d'une pièce
DE3153414C2 (fr)
DE4024796A1 (de) Schablonenrahmen und vorrichtung fuer ihn
DE438919C (de) Anordnung von Punkturbolzen zum genauen Anlegen mehrfarbig zu bedruckender Bogen an die Druckformen
DE2010899C3 (de) PaBvorrichtung für zylindrische und flache Bogenoffsetdruckmaschinen
DE8811765U1 (de) Positioniervorrichtung für Druckwerkzeuge und kupferkaschierte Platten
DE10203048C2 (de) Verfahren und Vorrichtung zum Zuordnen von Registerabweichungen bei einer Druckmaschine
DE2351220B2 (de) Verfahren und Vorrichtung zum Herstellen von Montagen für den Mehrfarbendruck
DE4129046A1 (de) Plattenvorderkantenbefestigung einer druckplatte an druckmaschinen

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 ES FR GB IT LI 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 ES FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19900601

17Q First examination report despatched

Effective date: 19920407

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

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19920928