http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-962108-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b73bb5b611ad02b686a7967bc6ca3412 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S101-37 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C25D13-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03G13-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03G17-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C25D13-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03G13-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03G17-02 |
| filingDate | 1960-06-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1964-06-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-962108-A |
| titleOfInvention | Improvements in electrophotography |
| abstract | A process for developing an image on a light-exposed photo-conductive copysheet having an electrically conductive backing comprises connecting the backing as cathode and electroplating metal on the light-exposed areas of the photoconductive layer and subsequently connecting the backing as anode and effecting electrolysis to produce a further layer on the plated image areas. The photoconductive sheet, typically of the zinc oxide-in-resin type, may be exposed in the plating bath through the transparent walls, either through its base if this is transparent or if the base is opaque through a frame-like anode or a grid anode which is oscillated to avoid recording the grid pattern, plating development being effected simultaneously with exposure if desired. The base, if not of non-conductive material such as cellulose acetate on which is coated a conductive metal film in contact with the photoconductive layer, is covered on its outer face with a sheet or coating of non-conductive plastic. The image may be developed by the deposition of copper, silver or nickel as described in Specification 864,474. The conductive layer or film of the backing is then connected as anode in a bath of a dye with a coloured anion which is deposited on the metal plated image which may also be oxidised simultaneously. Alternatively a colourless dye such as indigo white may be anodically oxidized to insoluble indigo on the metal image either by including it in an electrolyte or by coating the metal plated photo-conductive surface with it. A coloured image on a nickel plated layer may be produced anodically on a material on an aluminium backing by moving over it a sponge containing a dilute aqueous solution of sodium sulphite, p-nitrobenzyl cyanide and p-amino-diethylaniline, a -naphthol or ethyl aceto-acetate to produce magenta, cyan or yellow images respectively. Reference is made to using other oxidizable compounds such as pyrogallic acid. Electrophoretic deposition of negatively charged particles such as aqueous dispersions of aniline blue or indigo or of organic polymeric materials may be employed. For the production of lithographic plates, the metal plated image on a layer of zinc oxide in butadiene-styrene on an aluminium backing is electrophoretically coated as anode with polythene, polypropylene, PTFE, rubber, butadiene-acrylonitrile or -styrene, polyvinyl acetate, polystyrene or polyvinylidene chloride from aqueous dispersions. Coloured pigments, carbon black, or silica may be incorporated in the dispersed polymeric particles. |
| priorityDate | 1959-06-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 47.