CA2120158A1 - Process and apparatus for the production of a flexible and dimensionally stable image carrier for screen printing - Google Patents
Process and apparatus for the production of a flexible and dimensionally stable image carrier for screen printingInfo
- Publication number
- CA2120158A1 CA2120158A1 CA 2120158 CA2120158A CA2120158A1 CA 2120158 A1 CA2120158 A1 CA 2120158A1 CA 2120158 CA2120158 CA 2120158 CA 2120158 A CA2120158 A CA 2120158A CA 2120158 A1 CA2120158 A1 CA 2120158A1
- Authority
- CA
- Canada
- Prior art keywords
- grooves
- process according
- clich
- screen
- image carrier
- 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.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/14—Forme preparation for stencil-printing or silk-screen printing
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
Abstract of the Disclosure The novel process for the production of image carriers for screen printing consists of: A clich? (7) is provided with interconnecting grooves (2,3) whose spacing is equal to the mesh opening (a) of the image carrier (11) and whose maximum width (c) is equal to the maximum width (b) of the walls (12) of the image carrier. The grooves (2,3) are filled, at least, with a liquid resin, which is, at least partially, solidified in the grooves (2,3) and thereafter separated from the clich? (7).
the novel process enables a relative simple and - compared to other known methods of producing image carriers for screen printing - cheaper production of image carriersfor screen printing.
(Fig. 4)
the novel process enables a relative simple and - compared to other known methods of producing image carriers for screen printing - cheaper production of image carriersfor screen printing.
(Fig. 4)
Description
2~g .
?rocess and Ap?aratus for Ine ~roauclion ol a flexiDle ana dimensionally stabie lmaqe Carrier for Screen ~rintinq.
T'ne invention relates lo a process and apparatus for the production of a fle~ible and dimensionaliy stable image carrier for screen printing. Above all, the dimensional stabiiily is required in tensiie stress.
Up to now, image car~iers for screen printing have generally been woven from metal wires or monofilamen~ polymer t..reaas. As is well known, tne woven meshes are tnicker where warp and wef wires or threads cross over. ~hiist calendering of the woven screen can reduce this extra thic~ness on the crossover points, it cannot completely overcome it. Therefore, it is r.ot possible to prouce entirely flat or plane meshes or image carr,ers by weaving. In particular, fine gauzes woven from thin wires or threads snow this thickening effeci on the crossover points very markediy. Tne present invention is tnere ore particulzrly aimea at screen pr~nling ;neshes where tne wire or thread coun~ exceeas 10/cm, and especially w.-.ere it e.xceeds ~JCm.
Additionally, with syn~r.e~ c gauzes, the mesh cannot ~e lixed z~
the crossover poinis, so that the warp anà weft threads can be disiodged against each other unaer stress. Sucn mesnes ~eco.ne useful afLd stable for screer prin~ing only when are stretcned and fixed ~o rigid scree.l p~n~ing frames witn tensions of 2u N/cm and hiy;ner.
Screen printing i~age carriers are also ~nown where Ihe disadvan~ages of woven gzuzes are avoided. In ~:nese perforaiea metal foils tne openings are hexagonal aperiures connec~ed to each otner by me,zllic walis, e.g. nickel, to achieve Ire necessary s~ability. As thes~ aperiured metal foiis are often elec~-oformed, a Aigh rejection rate is unavoidabie ~nd their manufacture is therefore expensive.
- 2~2~
, It is an objecl OI -ne presenl invenlion to prouce a image carrier or screen prin~ ng ~esn free of t;~e above disadvantages and which can be mar.~factureà relatively cheaply.
This can be achieved in accordance with rhe present invention Dy the follow~ny s~eps:
- a cliche consisting of a dimensional stable material is provided on its surfac~e witr. interconnecling grooves, the inside width of which forms ~ne aperlures of the screen or image carrier and the thickness OI them forms tne tnick-ness of the walls or tne screen or image carr~er, - tne grooves of ~he cliché are at leas~t par~iaiiy rii;ed with a hardenable resin;
- the resin is, at least partially, solidified in the grooves and subsequen~ly removed from tne clicné.
In this new process, on ~ tne construcrion of a ihigh precision cliche, of wnich at leas~ tr.e surrace prererably consists of a met~l, is r~iativeiy experlsive. Tne grcoves ca preferably _e p.rovided ~y a laser beam, or may De chemicaliy etched, or mechanically enqraved. The meial surfzce of the ciicne ,~ay consis~ o~ brass or copper, whicr. may be surface nardened, e.g.
by nickel or nard chrome plaiing. âuch a ciicne has a goo;1 durabiiity so that many screen printing meshes can De produced by i~.
In a preferred ernbodlment ~he grooves are formea ir. straignc lines at right angles to each other. ~lternativel-~, tne grooves may be arranged sucn as to produce a honeycomb patterned ~creen.
Where the grooves meet a conriuence of liquid resin occurs, followed by the solidificatio~ of the resin in one plane ~y thermal, chemical or radiation inducea polymerisation.
The separation OI ihe 50 Iormed mesh or image carrier from the cliche can be aided by release coating tne grooves of the cliché, e.g. with a silicone oil, and~or Dy a~idin~ siiicone oii ~o the iiquia resin.
2~2~
The tensile strength of themesh can be improved Dy streng~nening the mesh, ai le~st in one direction, by incorporating reinfor-cement filaments - consisting, for example, of polyesler, fiDer glass or metai ~ which are prefera~ly laid into the grooves after fiiling them with llquià resin.
The cross~section of the grooves may be V-shaped or U-shapea and may additionally be enlarged conically. Furthermore, tne grooves in one ~ireciion may differ in numbersjcm, shape and depth from those of the other intersecting direclion.
For continuous manufac~ure of screen printing screens in accor-~ance with tne present invention, a rotataDie cylindricai cliche, having grooves along the cirumrerence and along the generating iines, is used.
Reinforcement of the selvage (selvedge) of Ihe gauze can be obtained by a stepped increase in tne depth of the grooves, at least on two opposite sides of the cliche. The selv~ge of the scre~n may be even further strengthened by introducing reinfor-cement filaments into the stepped selvage grooves befo~e the resin is haraened. The thic~.ness ol the gauze may aiso be varied by cnanging ihe soiids coni~ni or tne iiguid resir..
The following explains the working of the invention ~y way of examples in connection with Ihe drawings:
rig. i snows schematicaliy a flat grooveG ciiché
~ which can bè used for the produc~ion of individuai screens having the same si~e as the clicnb;
Fig. 2 shows a rotata~le, cy-lindricai ciiche fo~ he continuous produciion o, mesnGs in accordance witn ~he invention~
2~2~
.
Fig. 3, shows e~amples or various cross sections of a - e grooves;
Fig. 4 illuslrates the enlargemen~ of a plan view of ihe surface of a cliché as shown in rigs. i and 2;
Fig. 5 is a cross section of the reinforced selvage o a mesh made in accordance witn tne inveniion;
Fig. ~ is a schematic dispiay of a produc~ion line for the continuous produc~ion o~ image carriers for screen printing.
The piane metal surface of the cliche 1 in accordance with Fig.
1 shows longitudinai grooves 2 and those 3 at a righc angle lo them. The grooves have ~een produced by one of the aDove mentioned methods, e.g. by etcning. The plate 1 is surrounded Dy a raised grooveless border 4; the edges 5 in the longtudinal direction which are free of grooves, have a row of proiusions o.
Their purpose is io create holes in the longitudinal edges of a image carrier 11 (Fig. ~) so that the finished carrier 11 can be convenienlly located and fixed to a seif-~ensioning screen frame, e.g. using the ~creenfix ~andling System or the Platefi~-System of the PRSS-~aschinen AG of Winterthur, ~witzeriand.
The distance between the grooves 2,3 delermines the aperture _ (Fig. 5) in the gauze or carrier 11. The ma~imum width b (Fig.
5) of the connecting walls 12 is determined by the maximum width c (Fig. 3c) of the grooves 2,3.
Plane clichés 1 are preferaDly used for the pro~iuction of scre~ns or carriers 11 wnich need no rein~orcement 9, or of honeycomb paiterned screens which cannot be reinforced by filaments.
2~Q~
For a continuous production which will ~e described laler, a rotatable mandrel 7 (Fig. 2) is used; the longituciinal groo-~es 2 are located along the periphery of the cylinder, the latitu-dinals, that is to say, those at a rignl angle to the longitudinals, extend along the generating lines of tne cylinder. During the rotation of the cylindrical cliché 7 dimensionally stable filaments or reinforcing thin wires 9 may be laid into the peripherical grooves 2; when the grooves 2 wiii be fiiled with iiquid resin, the reinforcements 9 will De embedded into the resin.
The reinforcements 9 serves to the purpo~e oi- increasing the dimensional stability of the image carrier 11, especially for increasing its ~ensile sirengtn. Ii is, oi course possible to reinforce the grooves 3 instead or in adai~ion to the grooves 2.
As may be seen in Fig. 2, the grooves 3 are mereiy ~rovided in the middle section 8 of the cyiinder jacket wnilst ihe edges 10 are stepped, at least approximaiely to th dept~l of tne grooves.
Reinforcing filaments 9 are distributed on the selvage 10 to reinforce the edges of the screen or image carrier 11.
. . .
Cross sectiGnal semicircles, as shown in Fig. 3a, or circular ~egments have been proved to be useful for the grooves 2,3, possibly ~ith rectangular sections added to them (Fig. 3bj. Of course other cross sections, as shown in Figs. 3c, 3d and ~e, are also applicable. ~s has already slaied, distance, shape and depth of the grooves ~ or 3 are ihe same in one direciion, but may be varied for the other directior..
Fig. 4 snows an eniarged ~,ew of ihe surface ol tne cyiinaer 7 shown in Fig. 2 which cyiinder 7 represents the regative form of the gau~e or image carrier 11 ol Fig. 5.~Tne peripilerai grooves 2 con~aining the reinforcemer;~ fiiamen~s 9 are ver~icaiiy aligned, the raised parts 1~ of tne surface whic;n form the apertures of the screen or image carrier 11 are snown ha~cr.ed in Fig. 4.
2~201~8 ~, As may be seen from the shape of the wdils 12 of ~he image carrier 11 in Fig. 5, the peripheral grooves 2 of the cyiinder 7 are circular or U- ~ shaped respeclively and are reinforcea with filaments 9, as shown in Fig. 3 and may be wider towaras che surface 15 of the cylinder 7. On the left side or Fig. 5 may be seen a selvage 16, reinforced by filaments 9 also, producea by a stepped recess 10 in the surlace of the cylinder 7 (Fig.
2).
Fig. & shows a schematic view of a production arrangemeni for the continùous production of screens or image carri~rs 11. 21 is a warp beam with a brake 22, reinforcing filaments 9 are inserted into the grooves 2 (Fig. 2) of a rotatable cyiinder 7.
Between both cylinders 21 and 7 a reed 23 is provided to straighten and guide the reinforcing fiiamenis 9.
The arive (noi shown) of the continuous screen production line or arrangement which bears a slight resemblance to a weaving machine, is effected by a ~raction beam 24, following the cylinder 7. The partially hardened screen 11 is pulied over the traction beam 24 and pressed against it by pressure rollers 25.
The continuous screen production arrangement or machine, shown by way of example only, has a coating trough 26 which filis at least pa~ialiy the grooves 2,3 of the cylinder 7 over its wnole width with a liquid resin, then the reinforcing filaments 9 are fed ~y the reed 23 and an inlet 27 into the peripherai grooves 2 of the cylinder 7. As has ~een statea ~elore, the thickrAes3 a ~ (Fig. S) of the screen or image carrier il can ~e con~roiieà i~y the depth of the grooves ar~d/or, to a certain exteni, also Dy the soiids content ol tne iiquid resin.
Alternativeiy, the coating trough 26 can also ~e placed behind the inlei 27 for the reinforcing ~ilaments 9.
-- 2~2~ 8 Surplus resin is removed by a aoctor blaàe 28 and can ~e recycled to the coating trough 26 via a return pipe 29. The liquid resin having been doctored by the blade 2a into the grooves 2,3 of the rotating cylinder 7, is then solidi~ied by a radiator 30 which emits radiation of a wavelengtn suitable for curing the resin system used. When the screen or image ca~rier 11 parts from the cylinder 7, it is sufficiently hardened to be transported over the rollers 24 and 25 to the final hardening into a after-cure chamber 31 which also contains a radiator of suitable wavelength.
THe finished screen or image carrier 11 is finally rolled via a deflection roller 32 onto a driven ~eam 33. The drive and clutch mechanism of thi~ beam lS not shown.
_.~
?rocess and Ap?aratus for Ine ~roauclion ol a flexiDle ana dimensionally stabie lmaqe Carrier for Screen ~rintinq.
T'ne invention relates lo a process and apparatus for the production of a fle~ible and dimensionaliy stable image carrier for screen printing. Above all, the dimensional stabiiily is required in tensiie stress.
Up to now, image car~iers for screen printing have generally been woven from metal wires or monofilamen~ polymer t..reaas. As is well known, tne woven meshes are tnicker where warp and wef wires or threads cross over. ~hiist calendering of the woven screen can reduce this extra thic~ness on the crossover points, it cannot completely overcome it. Therefore, it is r.ot possible to prouce entirely flat or plane meshes or image carr,ers by weaving. In particular, fine gauzes woven from thin wires or threads snow this thickening effeci on the crossover points very markediy. Tne present invention is tnere ore particulzrly aimea at screen pr~nling ;neshes where tne wire or thread coun~ exceeas 10/cm, and especially w.-.ere it e.xceeds ~JCm.
Additionally, with syn~r.e~ c gauzes, the mesh cannot ~e lixed z~
the crossover poinis, so that the warp anà weft threads can be disiodged against each other unaer stress. Sucn mesnes ~eco.ne useful afLd stable for screer prin~ing only when are stretcned and fixed ~o rigid scree.l p~n~ing frames witn tensions of 2u N/cm and hiy;ner.
Screen printing i~age carriers are also ~nown where Ihe disadvan~ages of woven gzuzes are avoided. In ~:nese perforaiea metal foils tne openings are hexagonal aperiures connec~ed to each otner by me,zllic walis, e.g. nickel, to achieve Ire necessary s~ability. As thes~ aperiured metal foiis are often elec~-oformed, a Aigh rejection rate is unavoidabie ~nd their manufacture is therefore expensive.
- 2~2~
, It is an objecl OI -ne presenl invenlion to prouce a image carrier or screen prin~ ng ~esn free of t;~e above disadvantages and which can be mar.~factureà relatively cheaply.
This can be achieved in accordance with rhe present invention Dy the follow~ny s~eps:
- a cliche consisting of a dimensional stable material is provided on its surfac~e witr. interconnecling grooves, the inside width of which forms ~ne aperlures of the screen or image carrier and the thickness OI them forms tne tnick-ness of the walls or tne screen or image carr~er, - tne grooves of ~he cliché are at leas~t par~iaiiy rii;ed with a hardenable resin;
- the resin is, at least partially, solidified in the grooves and subsequen~ly removed from tne clicné.
In this new process, on ~ tne construcrion of a ihigh precision cliche, of wnich at leas~ tr.e surrace prererably consists of a met~l, is r~iativeiy experlsive. Tne grcoves ca preferably _e p.rovided ~y a laser beam, or may De chemicaliy etched, or mechanically enqraved. The meial surfzce of the ciicne ,~ay consis~ o~ brass or copper, whicr. may be surface nardened, e.g.
by nickel or nard chrome plaiing. âuch a ciicne has a goo;1 durabiiity so that many screen printing meshes can De produced by i~.
In a preferred ernbodlment ~he grooves are formea ir. straignc lines at right angles to each other. ~lternativel-~, tne grooves may be arranged sucn as to produce a honeycomb patterned ~creen.
Where the grooves meet a conriuence of liquid resin occurs, followed by the solidificatio~ of the resin in one plane ~y thermal, chemical or radiation inducea polymerisation.
The separation OI ihe 50 Iormed mesh or image carrier from the cliche can be aided by release coating tne grooves of the cliché, e.g. with a silicone oil, and~or Dy a~idin~ siiicone oii ~o the iiquia resin.
2~2~
The tensile strength of themesh can be improved Dy streng~nening the mesh, ai le~st in one direction, by incorporating reinfor-cement filaments - consisting, for example, of polyesler, fiDer glass or metai ~ which are prefera~ly laid into the grooves after fiiling them with llquià resin.
The cross~section of the grooves may be V-shaped or U-shapea and may additionally be enlarged conically. Furthermore, tne grooves in one ~ireciion may differ in numbersjcm, shape and depth from those of the other intersecting direclion.
For continuous manufac~ure of screen printing screens in accor-~ance with tne present invention, a rotataDie cylindricai cliche, having grooves along the cirumrerence and along the generating iines, is used.
Reinforcement of the selvage (selvedge) of Ihe gauze can be obtained by a stepped increase in tne depth of the grooves, at least on two opposite sides of the cliche. The selv~ge of the scre~n may be even further strengthened by introducing reinfor-cement filaments into the stepped selvage grooves befo~e the resin is haraened. The thic~.ness ol the gauze may aiso be varied by cnanging ihe soiids coni~ni or tne iiguid resir..
The following explains the working of the invention ~y way of examples in connection with Ihe drawings:
rig. i snows schematicaliy a flat grooveG ciiché
~ which can bè used for the produc~ion of individuai screens having the same si~e as the clicnb;
Fig. 2 shows a rotata~le, cy-lindricai ciiche fo~ he continuous produciion o, mesnGs in accordance witn ~he invention~
2~2~
.
Fig. 3, shows e~amples or various cross sections of a - e grooves;
Fig. 4 illuslrates the enlargemen~ of a plan view of ihe surface of a cliché as shown in rigs. i and 2;
Fig. 5 is a cross section of the reinforced selvage o a mesh made in accordance witn tne inveniion;
Fig. ~ is a schematic dispiay of a produc~ion line for the continuous produc~ion o~ image carriers for screen printing.
The piane metal surface of the cliche 1 in accordance with Fig.
1 shows longitudinai grooves 2 and those 3 at a righc angle lo them. The grooves have ~een produced by one of the aDove mentioned methods, e.g. by etcning. The plate 1 is surrounded Dy a raised grooveless border 4; the edges 5 in the longtudinal direction which are free of grooves, have a row of proiusions o.
Their purpose is io create holes in the longitudinal edges of a image carrier 11 (Fig. ~) so that the finished carrier 11 can be convenienlly located and fixed to a seif-~ensioning screen frame, e.g. using the ~creenfix ~andling System or the Platefi~-System of the PRSS-~aschinen AG of Winterthur, ~witzeriand.
The distance between the grooves 2,3 delermines the aperture _ (Fig. 5) in the gauze or carrier 11. The ma~imum width b (Fig.
5) of the connecting walls 12 is determined by the maximum width c (Fig. 3c) of the grooves 2,3.
Plane clichés 1 are preferaDly used for the pro~iuction of scre~ns or carriers 11 wnich need no rein~orcement 9, or of honeycomb paiterned screens which cannot be reinforced by filaments.
2~Q~
For a continuous production which will ~e described laler, a rotatable mandrel 7 (Fig. 2) is used; the longituciinal groo-~es 2 are located along the periphery of the cylinder, the latitu-dinals, that is to say, those at a rignl angle to the longitudinals, extend along the generating lines of tne cylinder. During the rotation of the cylindrical cliché 7 dimensionally stable filaments or reinforcing thin wires 9 may be laid into the peripherical grooves 2; when the grooves 2 wiii be fiiled with iiquid resin, the reinforcements 9 will De embedded into the resin.
The reinforcements 9 serves to the purpo~e oi- increasing the dimensional stability of the image carrier 11, especially for increasing its ~ensile sirengtn. Ii is, oi course possible to reinforce the grooves 3 instead or in adai~ion to the grooves 2.
As may be seen in Fig. 2, the grooves 3 are mereiy ~rovided in the middle section 8 of the cyiinder jacket wnilst ihe edges 10 are stepped, at least approximaiely to th dept~l of tne grooves.
Reinforcing filaments 9 are distributed on the selvage 10 to reinforce the edges of the screen or image carrier 11.
. . .
Cross sectiGnal semicircles, as shown in Fig. 3a, or circular ~egments have been proved to be useful for the grooves 2,3, possibly ~ith rectangular sections added to them (Fig. 3bj. Of course other cross sections, as shown in Figs. 3c, 3d and ~e, are also applicable. ~s has already slaied, distance, shape and depth of the grooves ~ or 3 are ihe same in one direciion, but may be varied for the other directior..
Fig. 4 snows an eniarged ~,ew of ihe surface ol tne cyiinaer 7 shown in Fig. 2 which cyiinder 7 represents the regative form of the gau~e or image carrier 11 ol Fig. 5.~Tne peripilerai grooves 2 con~aining the reinforcemer;~ fiiamen~s 9 are ver~icaiiy aligned, the raised parts 1~ of tne surface whic;n form the apertures of the screen or image carrier 11 are snown ha~cr.ed in Fig. 4.
2~201~8 ~, As may be seen from the shape of the wdils 12 of ~he image carrier 11 in Fig. 5, the peripheral grooves 2 of the cyiinder 7 are circular or U- ~ shaped respeclively and are reinforcea with filaments 9, as shown in Fig. 3 and may be wider towaras che surface 15 of the cylinder 7. On the left side or Fig. 5 may be seen a selvage 16, reinforced by filaments 9 also, producea by a stepped recess 10 in the surlace of the cylinder 7 (Fig.
2).
Fig. & shows a schematic view of a production arrangemeni for the continùous production of screens or image carri~rs 11. 21 is a warp beam with a brake 22, reinforcing filaments 9 are inserted into the grooves 2 (Fig. 2) of a rotatable cyiinder 7.
Between both cylinders 21 and 7 a reed 23 is provided to straighten and guide the reinforcing fiiamenis 9.
The arive (noi shown) of the continuous screen production line or arrangement which bears a slight resemblance to a weaving machine, is effected by a ~raction beam 24, following the cylinder 7. The partially hardened screen 11 is pulied over the traction beam 24 and pressed against it by pressure rollers 25.
The continuous screen production arrangement or machine, shown by way of example only, has a coating trough 26 which filis at least pa~ialiy the grooves 2,3 of the cylinder 7 over its wnole width with a liquid resin, then the reinforcing filaments 9 are fed ~y the reed 23 and an inlet 27 into the peripherai grooves 2 of the cylinder 7. As has ~een statea ~elore, the thickrAes3 a ~ (Fig. S) of the screen or image carrier il can ~e con~roiieà i~y the depth of the grooves ar~d/or, to a certain exteni, also Dy the soiids content ol tne iiquid resin.
Alternativeiy, the coating trough 26 can also ~e placed behind the inlei 27 for the reinforcing ~ilaments 9.
-- 2~2~ 8 Surplus resin is removed by a aoctor blaàe 28 and can ~e recycled to the coating trough 26 via a return pipe 29. The liquid resin having been doctored by the blade 2a into the grooves 2,3 of the rotating cylinder 7, is then solidi~ied by a radiator 30 which emits radiation of a wavelengtn suitable for curing the resin system used. When the screen or image ca~rier 11 parts from the cylinder 7, it is sufficiently hardened to be transported over the rollers 24 and 25 to the final hardening into a after-cure chamber 31 which also contains a radiator of suitable wavelength.
THe finished screen or image carrier 11 is finally rolled via a deflection roller 32 onto a driven ~eam 33. The drive and clutch mechanism of thi~ beam lS not shown.
_.~
Claims (20)
1. Process for the production of a flexible and dimensionally stable screen or image carrier (11) for screen printing, characterized in that :
- a clich? (1,7) consisting of a dimensional stable material is provided on its surface with interconnecting grooves (2,3), the inside width of which forms the apertures (a) of the screen (11) and the thickness (c) of them forms the thickness (b) of the walls (12) of the screen or image carrier (11), - the grooves (2,3) of the clich? (1,7) are at least partially filled with a hardenable, liquid resin, - the resin being located still in the grooves (2,3) is solidified at least partially and is subsequently remo-ved (peeled) from the clich? (1,7).
- a clich? (1,7) consisting of a dimensional stable material is provided on its surface with interconnecting grooves (2,3), the inside width of which forms the apertures (a) of the screen (11) and the thickness (c) of them forms the thickness (b) of the walls (12) of the screen or image carrier (11), - the grooves (2,3) of the clich? (1,7) are at least partially filled with a hardenable, liquid resin, - the resin being located still in the grooves (2,3) is solidified at least partially and is subsequently remo-ved (peeled) from the clich? (1,7).
2. Process according to claim 1, characterized in that. the grooves (2,3) are formed by intersecting straight lines.
3. Process according to claim 2, characterized in that: the grooves (2,3) are at right angles to each other.
4. Process according to one of the claims 1 to 3, characterized in that: the thickness (d) of the screen (11) can be adjusted by the solids content of the liquid resin.
5. Process according to one of the claims 2 to 4, characterized in that: at least the grooves (2 or 3) in one direction are provided with reinforcing filaments or wires (9) which are tensionally stable (invariant).
6. Process according to claim 5, characterized in that: the reinforcement (9) is placed into the resin filled grooves (2,3).
7. Process according to one of the claims 1 to 6, characterized in that at least the grooves (2 or 3) in one direction enlarge to the top.
8. Process according to claim 7, characterized in that: the grooves (2,3) are V-shaped.
9. Process according to one of the claims 1 to 8, characterized in that: the grooves (2,3) have an asymmetric cross section.
10. Process according to one of the claims 1 to 9, characterized in that: the grooves (2) of one direction are different in spacing, shape and depth to those (33 in the other direction.
11. Process according to one of the claims 1 to 10, characte-rized in that: the clich? is in form of a cylinder (7) having grooves in the peripheral direction (2) and at right angles to it (3) along generating lines.
12. Process to claims 5 and 11, characterized is that: the reinforcement (9) is placed into the peripheral grooves (2) of the cylinder (7).
13. Process according to one of the claims 1 to 12, characte-rized in that: the grooves (2,3) of the clich? (7) are coated with a release agent before filling them with liquid resin.
14. Process according to one of the claims 1 to 13, characte-rized in that: the hardenable liquid resin has been moddified by the addition of a release agent.
15. A clich? for a process in accordance with one of the aforementioned claims characterized in that: it consists of a rigid and dimensionally stable material, having at least a metal surface (15) which is provided with interconnected grooves (2,3).
16. A clich? in accordance with claim 15, characterized in that:
it is provided with cross intersecting grooves (2,3).
it is provided with cross intersecting grooves (2,3).
17. A clich? in accordance with claim 15 or 16, characterized in that: it is a cylinder (7) having a metal sleeve (15) on the outside which has been provided with grooves (2,3), both in the peripheral direction and vertical to it along generating lines.
18. A clich? in accordance to one of the claims 15 to 17, characterized is that: both outer edges have a stepped recess (10).
19. A clich? in accordance with claim 18, characterized in that:
a reinforcement (9) is placed into the recess (10).
a reinforcement (9) is placed into the recess (10).
20. A image carrier for screen printing made in accordance with a process according to at least one of the claims 1 to 14.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH256792A CH684527A5 (en) | 1992-08-18 | 1992-08-18 | A process for producing a flexible and dimensionally stable carrier for silk screen printing stencils. |
| CH02567/92 | 1992-08-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2120158A1 true CA2120158A1 (en) | 1994-03-03 |
Family
ID=4236711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2120158 Abandoned CA2120158A1 (en) | 1992-08-18 | 1993-08-11 | Process and apparatus for the production of a flexible and dimensionally stable image carrier for screen printing |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0620783B1 (en) |
| JP (1) | JPH07502946A (en) |
| CN (1) | CN1084454A (en) |
| AU (1) | AU4556793A (en) |
| BR (1) | BR9305600A (en) |
| CA (1) | CA2120158A1 (en) |
| CH (1) | CH684527A5 (en) |
| DE (1) | DE59304301D1 (en) |
| TW (1) | TW258691B (en) |
| WO (1) | WO1994004361A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL9302238A (en) * | 1993-12-22 | 1995-07-17 | Stork Screens Bv | Metallic screen material with wire or fiber structure and method for the production of such a material. |
| ATE192077T1 (en) * | 1997-08-18 | 2000-05-15 | Schablonentechnik Kufstein Ag | METHOD FOR PRODUCING A SCREEN PRINTING TEMPLATE AND APPARATUS SUITABLE FOR THIS |
| CN1081131C (en) * | 1999-05-31 | 2002-03-20 | 陈东钦 | Slide seat and driving device for cantilever type screen printer |
| NZ573217A (en) | 2006-05-05 | 2011-11-25 | Plascoenergy Ip Holdings S L Bilbao Schaffhausen Branch | A facility for conversion of carbonaceous feedstock into a reformulated syngas containing CO and H2 |
| CN103358671B (en) * | 2012-04-10 | 2017-06-06 | 昆山允升吉光电科技有限公司 | Cellulated wiremesh |
| CN105835517B (en) * | 2016-04-25 | 2018-11-23 | 于法周 | A kind of printing offset plate plate burning device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1261129B (en) * | 1966-12-21 | 1968-02-15 | Balco Filtertechnik G M B H | Screen printing stencil and stencil for their production |
| US4209582A (en) * | 1977-02-22 | 1980-06-24 | Arthur D. Little, Inc. | Method of preparing screen printing stencils using novel compounds and compositions |
| JPS599057A (en) * | 1982-07-08 | 1984-01-18 | Kuranosuke Ito | Preparation of screen printing plate by laser beam |
-
1992
- 1992-08-18 CH CH256792A patent/CH684527A5/en not_active IP Right Cessation
-
1993
- 1993-07-13 TW TW82105571A patent/TW258691B/zh active
- 1993-08-11 JP JP6505724A patent/JPH07502946A/en active Pending
- 1993-08-11 AU AU45567/93A patent/AU4556793A/en not_active Abandoned
- 1993-08-11 WO PCT/CH1993/000201 patent/WO1994004361A1/en not_active Application Discontinuation
- 1993-08-11 BR BR9305600A patent/BR9305600A/en not_active Application Discontinuation
- 1993-08-11 EP EP93915631A patent/EP0620783B1/en not_active Revoked
- 1993-08-11 DE DE59304301T patent/DE59304301D1/en not_active Expired - Fee Related
- 1993-08-11 CA CA 2120158 patent/CA2120158A1/en not_active Abandoned
- 1993-08-18 CN CN 93116435 patent/CN1084454A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| TW258691B (en) | 1995-10-01 |
| EP0620783A1 (en) | 1994-10-26 |
| CN1084454A (en) | 1994-03-30 |
| AU4556793A (en) | 1994-03-15 |
| BR9305600A (en) | 1995-03-01 |
| DE59304301D1 (en) | 1996-11-28 |
| CH684527A5 (en) | 1994-10-14 |
| JPH07502946A (en) | 1995-03-30 |
| EP0620783B1 (en) | 1996-10-23 |
| WO1994004361A1 (en) | 1994-03-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |