FR2733716A1 - Flat circular finishing brush for preparing photopolymer plates, used e.g. in flexography, dry offset etc. printing - Google Patents
Flat circular finishing brush for preparing photopolymer plates, used e.g. in flexography, dry offset etc. printing Download PDFInfo
- Publication number
- FR2733716A1 FR2733716A1 FR9505499A FR9505499A FR2733716A1 FR 2733716 A1 FR2733716 A1 FR 2733716A1 FR 9505499 A FR9505499 A FR 9505499A FR 9505499 A FR9505499 A FR 9505499A FR 2733716 A1 FR2733716 A1 FR 2733716A1
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- FR
- France
- Prior art keywords
- brush
- engraving
- station according
- etching
- solvent
- 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.)
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/30—Imagewise removal using liquid means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
Abstract
Description
La présente invention concerne une brosse de machine à graver et une machine à graver pour la réalisation d'imprimés en flexographie, typographie ou offset sec. The present invention relates to an engraving machine brush and an engraving machine for producing prints in flexography, typography or dry offset.
Les clichés pour la flexographie ou la typographie sont obtenus en exposant une plaque de photopolymère sensible aux rayonnements ultraviolets, avec interposition d'un film négatif qui laisse exposées au rayonnement les zones qui doivent venir en relief sur le cliché terminé. The plates for flexography or typography are obtained by exposing a photopolymer plate sensitive to ultraviolet radiation, with the interposition of a negative film which leaves exposed to the radiation the areas which must come into relief on the finished plate.
Le rayonnement durcit ces zones, on élimine ensuite la matière de la surface protégée en la brossant à l'aide de brosses planes ou rotatives ou par buses de pulvérisation ; un solvant ou de l'eau faisant office d'agent mouillant, on poursuit l'opération jusqu'à ce que les zones qui ont été exposées se trouvent suffisamment en relief. The radiation hardens these areas, the material is then removed from the protected surface by brushing it using flat or rotary brushes or by spray nozzles; solvent or water acting as a wetting agent, the operation is continued until the areas which have been exposed are sufficiently raised.
Un premier objet de l'invention est d'automatiser complètement l'ensemble du procédé de gravure. A first object of the invention is to completely automate the entire etching process.
Par ailleurs, on trouve actuellement sur le marché une large gamme de plaques photopolymères de toutes épaisseurs et dans tous les formats (jusqu'à 50 x 80 pouces- et on fabrique déjà des machines semi-automatiques ou automatiques sur lesquelles le cliché photopolymère est fixé ou collé sur le plateau porte-cliché et une brosse plane à mouvement orbital baignant dans un bain de gravure, permet de confectionner des clichés. In addition, there is currently on the market a wide range of photopolymer plates of all thicknesses and in all formats (up to 50 x 80 inches- and semi-automatic or automatic machines are already manufactured on which the photopolymer plate is fixed or glued to the plate holder and a flat brush with an orbital movement bathed in an etching bath, makes it possible to make photos.
Un autre but de l'invention est donc de confectionner des clichés photopolymères de tous formats et épaisseurs, dans une machine simple, permettant d' introduire d'un côté un cliché déjà exposé et de récupérer celui-ci après gravure, presque sec, dans un minimum de temps. Another object of the invention is therefore to make photopolymer plates of all formats and thicknesses, in a simple machine, making it possible to introduce on one side a plate already exposed and to recover it after engraving, almost dry, in minimum time.
Une machine de ce type est décrite dans le brevet 2 697 354 de la demanderesse. A machine of this type is described in patent 2,697,354 of the applicant.
Cette machine présente de bonnes performances de gravures et permet de graver en une seule fois des clichés de grand format.This machine has good engraving performance and allows large format shots to be burned at one time.
La présente invention vise à simplifier et diminuer le coût des petites machines à graver, les clichés de petits formats. The present invention aims to simplify and reduce the cost of small engraving machines, small format plates.
Jusqu'à présent, on utilisait des brosses rotatives cylindriques tournant autour de l'axe du cylindre disposé horizontalement, ou bien des brosses planes à mouvement
Iinéaire et alternatif. Dans les deux cas, les surfaces brossées sont des surfaces rectangulaires permettant une gravure régulière sur toute la surface rectangulaire du cliché.Until now, we used cylindrical rotary brushes rotating around the axis of the horizontally arranged cylinder, or even movement brushes
Linear and alternative. In both cases, the brushed surfaces are rectangular surfaces allowing regular etching over the entire rectangular surface of the plate.
Dans l'invention, on est allé à l'encontre des idées reçues en employant une brosse rotative à axe vertical dont la surface de brossage est circulaire. In the invention, we went against received ideas by using a rotary brush with vertical axis whose brushing surface is circular.
II a fallu alors résoudre le problème des déplacements latéraux de la plaque pendant la gravure. Ce problème est résolu grâce au poste de gravure pour machine à graver des clichés d'impression à partir d'une plaque photopolymère pour la flexographie, la typographie ou l'offset sec, caracténsé en ce qu'il comporte une brosse de gravure pla Ne et circulaire, montée à rotation autour de son axe central, et des rouleaux presseurs honzontaux maintenant la plaque pendant l'opération de gravure. It was then necessary to solve the problem of lateral displacements of the plate during the etching. This problem is solved thanks to the engraving station for a machine for engraving printing plates from a photopolymer plate for flexography, typography or dry offset, characterized in that it includes an engraving brush. and circular, rotatably mounted about its central axis, and honzontal pressure rollers holding the plate during the engraving operation.
Selon un mode préférentiel de mise en oeuvre et pour palier au problème des irrégularités de brossage, la brosse est entraînée alternativement dans un sens et dans l'autre. According to a preferred embodiment and to overcome the problem of brushing irregularities, the brush is driven alternately in one direction and in the other.
Dans toute la suite du texte et dans les revendications, on comprendra que le terme de solvant signifie qu'on peut utiliser tout solvant de gravure, de l'eau, ou un pourcentage d'acide ou de base. Throughout the text and in the claims, it will be understood that the term solvent means that any etching solvent, water, or a percentage of acid or base can be used.
On comprendra mieux l'invention à l'aide de la descnption qui suit faite en référence à la figure unique annexée qui représente en coupe verticale une brosse selon l'invention. The invention will be better understood using the following description made with reference to the single appended figure which represents in vertical section a brush according to the invention.
Une brosse circulaire (5) est montée à rotation autour de son axe de symétrie (12) disposé verticalement. A circular brush (5) is rotatably mounted about its axis of symmetry (12) arranged vertically.
Elle est entraînée à rotation par un moteur-réducteur non représenté entraînant l'axe vertical creux (2) dont l'alésage central (11) permet l'arrivée du solvant dans la brosse (5). Le mouvement est transmis à la brosse par un système à cardan moleté (3) combiné à un fourreau cranté (4) solidaire de la brosse (5); le fourreau (4) est également creux pour le passage du solvant à travers un perçage central (13) de la brosse. Tout autre moyen de liaison mécanique entre la brosse (5) et le moteur-réducteur et/ou tout autre moyen d'amenée du solvant peuvent convenir. It is rotated by a gear motor not shown driving the hollow vertical axis (2) whose central bore (11) allows the arrival of the solvent in the brush (5). The movement is transmitted to the brush by a knurled gimbal system (3) combined with a notched sheath (4) integral with the brush (5); the sheath (4) is also hollow for the passage of the solvent through a central bore (13) of the brush. Any other means of mechanical connection between the brush (5) and the motor-reducer and / or any other means of supplying the solvent may be suitable.
Une plaque à graver (10) est amenée en position de gravure par une barre de gravure (7) et supportée par une table de base (8). Deux ou plusieurs rouleaux presseurs (6) libres en rotation autour de leur axe horizontal, sont placés respectivement devant et derrière la brosse (5) par rapport au sens de déplacement (9) de la plaque (14). Leur fonction est d'empêcher les déplacements latéraux de la plaque pendant la gravure. An engraving plate (10) is brought into the engraving position by an engraving bar (7) and supported by a base table (8). Two or more pressure rollers (6) free to rotate about their horizontal axis, are respectively placed in front of and behind the brush (5) relative to the direction of movement (9) of the plate (14). Their function is to prevent lateral movement of the plate during engraving.
Afin de rattraper les défauts de gravure, la brosse est entraînée alternativement dans un sens et dans l'autre selon les flèches (1). In order to make up for the etching defects, the brush is driven alternately in one direction and in the other according to the arrows (1).
On prévoit en outre sous la brosse et du côté des poils, ou bien dans la brosse elle-même, des moyens de répartition du solvant sur la surface de gravure, par exemple des rainures radiales et/ou des trous. Provision is also made under the brush and on the bristle side, or else in the brush itself, for distributing the solvent on the etching surface, for example radial grooves and / or holes.
En outre la brosse est libre en hauteur de façon à s'adapter à l'épaisseur de la plaque. In addition, the brush is free in height so as to adapt to the thickness of the plate.
Le poste de gravure selon l'invention est suivi de façon classique par un poste de
nnçage classique.The engraving station according to the invention is conventionally followed by a
classic fastening.
L'invention permet la réalisation de machines à graver de petites dimensions,
simples, peu onéreuses dont les performances de gravures sont satisfaisantes pour des
clichés de petits formats.The invention allows the production of engraving machines of small dimensions,
simple, inexpensive whose engraving performance is satisfactory for
small format shots.
Ces machines peuvent fonctionner en continu ce qui est nouveau sur le marché. These machines can operate continuously which is new on the market.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9505499A FR2733716B1 (en) | 1995-05-04 | 1995-05-04 | FLAT CIRCULAR BRUSH FOR PHOTOPOLYMERIC PLATES ENGRAVING MACHINES |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9505499A FR2733716B1 (en) | 1995-05-04 | 1995-05-04 | FLAT CIRCULAR BRUSH FOR PHOTOPOLYMERIC PLATES ENGRAVING MACHINES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2733716A1 true FR2733716A1 (en) | 1996-11-08 |
| FR2733716B1 FR2733716B1 (en) | 1997-07-04 |
Family
ID=9478814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9505499A Expired - Fee Related FR2733716B1 (en) | 1995-05-04 | 1995-05-04 | FLAT CIRCULAR BRUSH FOR PHOTOPOLYMERIC PLATES ENGRAVING MACHINES |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2733716B1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3682078A (en) * | 1968-07-18 | 1972-08-08 | Western Litho Plate & Supply | Apparatus for post-exposure treatment of lithographic plates |
| US4474445A (en) * | 1983-03-21 | 1984-10-02 | E. I. Du Pont De Nemours And Company | Vacuum holddown device for flexographic printing plates |
| US4536909A (en) * | 1984-02-24 | 1985-08-27 | Basf Aktiengesellschaft | Apparatus for treating flexible printing plates produced by photochemical methods |
| JPS61249058A (en) * | 1985-04-26 | 1986-11-06 | Konishiroku Photo Ind Co Ltd | Developing process of photosensitive lithographic printing plate |
| JPS6242159A (en) * | 1985-04-25 | 1987-02-24 | Konishiroku Photo Ind Co Ltd | Method and device for processing photosensitive lithographic plate |
| US4733260A (en) * | 1984-03-05 | 1988-03-22 | Toyo Boseki Kabushiki Kaisha | Continuous plate making method for photosensitive resin plate and device thereof |
-
1995
- 1995-05-04 FR FR9505499A patent/FR2733716B1/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3682078A (en) * | 1968-07-18 | 1972-08-08 | Western Litho Plate & Supply | Apparatus for post-exposure treatment of lithographic plates |
| US4474445A (en) * | 1983-03-21 | 1984-10-02 | E. I. Du Pont De Nemours And Company | Vacuum holddown device for flexographic printing plates |
| US4536909A (en) * | 1984-02-24 | 1985-08-27 | Basf Aktiengesellschaft | Apparatus for treating flexible printing plates produced by photochemical methods |
| US4733260A (en) * | 1984-03-05 | 1988-03-22 | Toyo Boseki Kabushiki Kaisha | Continuous plate making method for photosensitive resin plate and device thereof |
| JPS6242159A (en) * | 1985-04-25 | 1987-02-24 | Konishiroku Photo Ind Co Ltd | Method and device for processing photosensitive lithographic plate |
| JPS61249058A (en) * | 1985-04-26 | 1986-11-06 | Konishiroku Photo Ind Co Ltd | Developing process of photosensitive lithographic printing plate |
Non-Patent Citations (2)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 011, no. 100 (P - 561) 28 March 1987 (1987-03-28) * |
| PATENT ABSTRACTS OF JAPAN vol. 011, no. 226 (P - 598) 23 July 1987 (1987-07-23) * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2733716B1 (en) | 1997-07-04 |
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| ST | Notification of lapse |