NO118380B - - Google Patents
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- Publication number
- NO118380B NO118380B NO65157501A NO15750165A NO118380B NO 118380 B NO118380 B NO 118380B NO 65157501 A NO65157501 A NO 65157501A NO 15750165 A NO15750165 A NO 15750165A NO 118380 B NO118380 B NO 118380B
- Authority
- NO
- Norway
- Prior art keywords
- transfer sheet
- layer
- layer transfer
- wax
- polyester
- Prior art date
Links
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 229920000728 polyester Polymers 0.000 claims abstract description 5
- 239000001993 wax Substances 0.000 claims description 16
- 239000011888 foil Substances 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 229920000515 polycarbonate Polymers 0.000 claims description 5
- 239000004417 polycarbonate Substances 0.000 claims description 5
- 235000013871 bee wax Nutrition 0.000 claims description 4
- 239000012166 beeswax Substances 0.000 claims description 4
- 235000013868 candelilla wax Nutrition 0.000 claims description 3
- 229940073532 candelilla wax Drugs 0.000 claims description 3
- 239000004204 candelilla wax Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 239000001913 cellulose Substances 0.000 claims description 3
- IUJAMGNYPWYUPM-UHFFFAOYSA-N hentriacontane Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC IUJAMGNYPWYUPM-UHFFFAOYSA-N 0.000 claims description 3
- 239000012170 montan wax Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 150000005691 triesters Chemical class 0.000 claims description 3
- 239000012876 carrier material Substances 0.000 claims description 2
- 239000003989 dielectric material Substances 0.000 claims description 2
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000000057 synthetic resin Substances 0.000 claims description 2
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 238000007786 electrostatic charging Methods 0.000 abstract 1
- 230000005855 radiation Effects 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/382—Contact thermal transfer or sublimation processes
- B41M5/38207—Contact thermal transfer or sublimation processes characterised by aspects not provided for in groups B41M5/385 - B41M5/395
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G13/00—Electrographic processes using a charge pattern
- G03G13/26—Electrographic processes using a charge pattern for the production of printing plates for non-xerographic printing processes
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
- G03G15/24—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 whereby at least two steps are performed simultaneously
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G17/00—Electrographic processes using patterns other than charge patterns, e.g. an electric conductivity pattern; Processes involving a migration, e.g. photoelectrophoresis, photoelectrosolography; Processes involving a selective transfer, e.g. electrophoto-adhesive processes; Apparatus essentially involving a single such process
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/02—Charge-receiving layers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Printing Methods (AREA)
Abstract
Sjiktoverfttringsblad for fremstilling av elektrostatisk oppladbare trykkeformer.Oppfinnelsen angår et sjiktoverforingsblad for fremstilling av elektrostatisk oppladbare trykkeformer av originaler ved varmekopiering, hvor sjiktoverforingsbladet bringes i kontakt med den ledende overflate av trykkeformen.Det er tidligere kjent å fremstille kopier ved bildemessig oppvarming og smeitning av et overforingssjikt og også trykkeformer på denne måte.Hensikten med oppfinnelsen er å tilveiebringe et sjiktoverforingsblad hvis sammensetning gir egenskaper som er i samsvar med gunstigst mulig elektrostatisk oppladningsevne.Dette oppnås ifolge oppfinnelsen ved at det på en som bæremateriale tjenende kunststoffolie, f.eks. polyester ellerThe invention relates to a bed transfer sheet for the production of electrostatically rechargeable printing forms of originals by heat copying, in which the layer transfer sheet is brought into contact with the conductive surface of the printing form. and also printing forms in this way. The object of the invention is to provide a layer transfer sheet whose composition gives properties which are in accordance with the most favorable possible electrostatic charging ability. polyester or
Description
polykarbonat, er anordnet et sjikt av smeltbart dielektrisk mate-riale som inneholder hardvoks, f.eks. montan- og/eller candelillavoks, i forbindelse med elektrostatisk godt oppladbar myk voks, som f.eks. bievoks. polycarbonate, a layer of fusible dielectric material containing hard wax, e.g. montan and/or candelilla wax, in connection with electrostatically highly chargeable soft wax, such as e.g. beeswax.
Fortrinnsvis inneholder sjiktet dielektriske stoffer, f.eks. kunstharpiks slik som cellulosetriester, polykarbonat eller polyester, i pulverform,, hvis smeltepunkt ligger over smeltepunktet for voksblandingen på sjiktoverforingsbladet. Preferably, the layer contains dielectric substances, e.g. synthetic resin such as cellulose triester, polycarbonate or polyester, in powder form, whose melting point is above the melting point of the wax mixture on the layer transfer sheet.
Selvsagt kan det som bæremateriale også anvendes tynt papir som slipper gjennom varmestrålene godt. Of course, thin paper can also be used as a carrier material, which allows the heat rays to pass through well.
Den praktiske overforing fra originalen til folien skjer prinsipielt på fblgende måte. Det anvendes en original som slipper varmestråler, særlig infrarbde stråler godt igjennom, hvilken original er forsynt med tegn som sterkt absorberer varmestråler, og overforingsbladets sjikt absorberer heller ikke varmestråler, slik at varmestrålene fra baksiden av originalen og baksiden av overforingsbladet, treffer trykkeformfoliens ledende sjikt. The practical transfer from the original to the foil takes place in principle in the following way. An original is used which lets heat rays, especially infrared rays through well, which original is provided with characters that strongly absorb heat rays, and the layer of the transfer sheet does not absorb heat rays either, so that the heat rays from the back of the original and the back of the transfer sheet hit the conductive layer of the printing form foil.
Et utforelseseksempel på oppfinnelsen skal for-klares nærmere under henvisning til tegningen. Fig. 1 viser de enkelte elementer for fremstilling av en elektrostatisk oppladbar trykkeform, bestående av en bærefolie, et sjiktoverforingsblad, og en original. Fig. 2 viser bærefolien, sjiktoverfbringsbladet og originalen lagt sammen og påvirket av infrarod stråling. Fig. 3 viser bærefolien, sjiktoverfbringsbladet og originalen atskilt fra hverandre etter bestrålingen. Fig. 1 viser et tverrsnitt gjennom trykkeformbærefolien 1, 2. Den består av et papirblad eller en kunststoffolie 1 f.eks. cellulosetriester, som er forsynt med et ledende sjikt 2. Dette ledende sjikt består fortrinnsvis av metall f.eks. aluminium som er pådampet i en tykkelse av 1 mikron. An embodiment of the invention will be explained in more detail with reference to the drawing. Fig. 1 shows the individual elements for producing an electrostatically chargeable printing form, consisting of a carrier film, a layer transfer sheet and an original. Fig. 2 shows the carrier film, the layer transfer sheet and the original put together and affected by infrared radiation. Fig. 3 shows the carrier film, the layer transfer sheet and the original separated from each other after the irradiation. Fig. 1 shows a cross-section through the printing form carrier film 1, 2. It consists of a sheet of paper or a plastic film 1, e.g. cellulose triester, which is provided with a conductive layer 2. This conductive layer preferably consists of metal, e.g. aluminum which is vapor deposited to a thickness of 1 micron.
Det for trykkeformfremstillingen nbdvendige sjiktoverforingsblad 3>4 består av en bærefolie 3 av papir eller kunststoff, som slipper gjennom infrarod stråling. Bærefolien er forsynt med et sjikt 4 som er smeltbart ved ca. 8o°C, og som består av en blanding av elektrisk godt oppladbar hard voks og myk voks. Som elektrisk godt oppladbar voks er egnet utpregede harde vokser som f.eks. montan- eller candelillavoks. Et smeltbart sjikt som bare består av hard voks er for sprb og må derfor gjbres mykere ved tilsetning av en passende myk voks. The layer transfer sheet 3>4 required for the production of the printing form consists of a carrier film 3 of paper or plastic, which lets infrared radiation through. The carrier foil is provided with a layer 4 which is fusible at approx. 8o°C, and which consists of a mixture of electrically highly chargeable hard wax and soft wax. Distinctly hard waxes such as e.g. montan or candelilla wax. A fusible layer consisting only of hard wax is too brittle and must therefore be made softer by adding a suitable soft wax.
Undersokelser har vist at de vanlige for mykgjoring på tale kommende myke vokser, fett og oljer er ikke egnet til dette formål, fordi de ikke eller bare i liten grad kan holde på elektriske ladninger. Den elektriske ladningsevne for hard voks blir således svekket ved tilsetning av disse uegnede stoffer, og er derfor ikke brukbare ved fremstilling av elektrostatiske trykkeformer. Det gis imidlertid en unntagelse fra denne regel. Således er for eksempel bievoks en myk voks med forholdsvis god ladbarhet og er derfor egnet for tilsetning for mykgjoring av hard voks i det fore-liggende tilfelle. Godt egnet er videre en blanding av bievoks og et godt oppladbart pulver av dielektrisk kunststoff, f.eks. polyester eller polykarbonat, og hvis smeltepunkt ligger hoyere enn voksets smeltepunkt. Investigations have shown that the usual soft waxes, fats and oils used for softening speech are not suitable for this purpose, because they cannot or only to a small extent hold electrical charges. The electrical chargeability of hard wax is thus weakened by the addition of these unsuitable substances, and are therefore not usable in the production of electrostatic printing forms. There is, however, an exception to this rule. Thus, for example, beeswax is a soft wax with relatively good chargeability and is therefore suitable for addition to soften hard wax in the present case. Also suitable is a mixture of beeswax and a highly rechargeable powder of dielectric plastic, e.g. polyester or polycarbonate, and whose melting point is higher than the wax's melting point.
På fig. 1 er videre vist i tverrsnitt originalen 5, 6 som består av et bærelegeme 5 som lett slipper igjennom infrarod stråling, f.eks. et papirark som er forsynt med bildeelementer 6 av en farve som absorberer infrarod stråling. In fig. 1 further shows in cross-section the original 5, 6 which consists of a support body 5 which easily lets infrared radiation through, e.g. a sheet of paper provided with image elements 6 of a color that absorbs infrared radiation.
På fig. 2 er trykkeformbærefolien 1, 2, sjiktoverfbringsbladet 3i 4°S originalen 5>6 anbrakt mot hverandre for fremstilling av trykkeformen. Bildeelementene 6 på originalen ut-settes for infrarod stråling fra en strålingskilde 7°g blir der-ved oppvarmet. Varmestrålene trenger gjennom bærelegemet 5- Der-ved oppstår det på originalen 5, 6 et termisk bildepotensial hvis termiske energi ved konveksjon trenger gjennom sjiktoverforings-bladets 3>4 bærefolie 3°g overfores til det smeltbare sjikt 4» Den på bildestedene 6 omsatte termiske energi er stor nok til å smelte sjiktet 4 Pa vedkommende steder. Dette har til folge at den smeltede del av sjiktet som på fig. 3 er betegnet med 4D ved av-skillelse av sjiktoverforingsbladet 3»4 fra trykkefolien 1, 2 blir klebende til det ledende sjikt 2. På sjiktoverforingsbladet 3, 4 står igjen resten av det smeltbare sjikt som på fig. 3 er betegnet med 4a, og som gir en negativ avbildning av originalen 5, 6. På den ledende metalloverflate 2 av trykkeformfolien 1 befinner det seg nå et elektrisk oppladbart bilde 4b som tilsvarer originalen - 5, 6. For å holde smeltevarmebehovet minst mulig ved denne termo-grafiske kopieringsprosess, må det smeltbare sjikt 4 gjores tynnest mulig, men på den annen side faller spenningspotensialet for den. elektriske ladning ved dielektriske sjikt sterkt under 10 mikron,-slik at en sjikttykkelse av det smeltbare sjikt 4 på 10 mikron har vist seg å være et gunstig kompromiss. In fig. 2, the printing form carrier foil 1, 2, the layer transfer sheet 3 in 4°S the original 5>6 are placed against each other for the production of the printing form. The image elements 6 on the original are exposed to infrared radiation from a radiation source 7°g and are thereby heated. The heat rays penetrate through the carrier body 5- Thereby, a thermal image potential arises on the original 5, 6 if thermal energy by convection penetrates through the layer transfer blade's 3>4 carrier foil 3°g is transferred to the fusible layer 4" The thermal energy converted at the image locations 6 is large enough to melt the layer 4 Pa in the relevant places. This has the result that the melted part of the layer as in fig. 3 is denoted by 4D upon separation of the layer transfer sheet 3, 4 from the printing foil 1, 2 becomes adhesive to the conductive layer 2. On the layer transfer sheet 3, 4, the rest of the fusible layer remains as in fig. 3 is denoted by 4a, and which gives a negative image of the original 5, 6. On the conductive metal surface 2 of the printing form foil 1 there is now an electrically chargeable image 4b which corresponds to the original - 5, 6. In order to keep the melting heat requirement as low as possible by this thermo-graphic copying process, the fusible layer 4 must be made as thin as possible, but on the other hand, the voltage potential for it drops. electric charge at dielectric layers well below 10 microns, so that a layer thickness of the fusible layer 4 of 10 microns has proven to be a favorable compromise.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER37982A DE1271126B (en) | 1964-05-28 | 1964-05-28 | Process for the production of electrostatically chargeable printing forms from templates |
Publications (1)
Publication Number | Publication Date |
---|---|
NO118380B true NO118380B (en) | 1969-12-22 |
Family
ID=7405374
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO65157501A NO118380B (en) | 1964-05-28 | 1965-04-01 |
Country Status (9)
Country | Link |
---|---|
US (1) | US3468254A (en) |
BE (1) | BE664631A (en) |
CH (1) | CH433991A (en) |
DE (1) | DE1271126B (en) |
FR (1) | FR1444280A (en) |
GB (1) | GB1096801A (en) |
NL (1) | NL6504307A (en) |
NO (1) | NO118380B (en) |
SE (1) | SE341925B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3919938A (en) * | 1974-09-20 | 1975-11-18 | Xerox Corp | Permanent electrostatic master |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2297691A (en) * | 1939-04-04 | 1942-10-06 | Chester F Carlson | Electrophotography |
US2357809A (en) * | 1940-11-16 | 1944-09-12 | Chester F Carlson | Electrophotographic apparatus |
NL237781A (en) * | 1958-04-04 | |||
NL251591A (en) * | 1959-05-15 |
-
1964
- 1964-05-28 DE DER37982A patent/DE1271126B/en active Pending
-
1965
- 1965-04-01 NO NO65157501A patent/NO118380B/no unknown
- 1965-04-05 NL NL6504307A patent/NL6504307A/xx unknown
- 1965-04-22 CH CH560265A patent/CH433991A/en unknown
- 1965-05-21 US US457672A patent/US3468254A/en not_active Expired - Lifetime
- 1965-05-24 GB GB21997/65A patent/GB1096801A/en not_active Expired
- 1965-05-24 FR FR18123A patent/FR1444280A/en not_active Expired
- 1965-05-25 SE SE6877/65A patent/SE341925B/xx unknown
- 1965-05-28 BE BE664631D patent/BE664631A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
DE1271126B (en) | 1968-06-27 |
US3468254A (en) | 1969-09-23 |
BE664631A (en) | 1965-09-16 |
GB1096801A (en) | 1967-12-29 |
NL6504307A (en) | 1965-11-29 |
SE341925B (en) | 1972-01-17 |
CH433991A (en) | 1967-04-15 |
FR1444280A (en) | 1966-07-01 |
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