GB904941A - Improvements in or relating to the preparation of hectographic printing master sheets - Google Patents

Improvements in or relating to the preparation of hectographic printing master sheets

Info

Publication number
GB904941A
GB904941A GB3444460A GB3444460A GB904941A GB 904941 A GB904941 A GB 904941A GB 3444460 A GB3444460 A GB 3444460A GB 3444460 A GB3444460 A GB 3444460A GB 904941 A GB904941 A GB 904941A
Authority
GB
United Kingdom
Prior art keywords
sheet
layer
dye
developer
wax
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.)
Expired
Application number
GB3444460A
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 GB904941A publication Critical patent/GB904941A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G03G15/26—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the charge pattern is obtained by projection of the entire image, i.e. whole-frame projection
    • 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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • 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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/082—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer for immersion

Abstract

904,941. Xerographic processes. RITZERFELD, W., and RITZERFELD, G. Oct. 7, 1960 [Oct. 22, 1959], No. 34444/60. Drawings to Specification. Class 98 (2). A hectographic printing master sheet, i.e. prepared from a thin flexible sheet of paper, synthetic material or metal having a semi-conducting layer by electrostatically charging the layer, exposing the layer to light from an original, developing the sheet at the image areas by means of an electrostatically charged medium comprising a mixture or compound of a resin and/or a wax or waxes with one or more dye materials or dye components soluble in alcohol; and fixing the sheet thermally, chemically or mechanically. The developer may be in the form of a powder, paste or liquid and consists of a dye (e.g. crystal violet, malachite green, fuchsine, auramine, victoria blue, setopalin, setocyanine, diphenyl methanes, spiroidipyrane, phenolphthalein, thymolphtalein, azodyes, metal salts which form alcohol soluble complex salts with organic compounds, carbon black, a wax (e.g. carnauba, montan wax, stearin) and/or a resin (e.g. colophony, ester gum, shellac, melumin, modified phenol formaldehyde resins, alkyd resins, silicone resins, polyvinyl chloride, polystyrol). To loosen the structure of a powder developer substances which develop gases on heating, e.g. a bicarbonate, and an organic acid, may be added. For a developer in the form of a liquid or paste chlorinated hydrocarbon, carbon tetrachloride, trichloroethylene, " Aerosol " or " Freon " (Registered Trade Mark) may be used for the above purpose. The photoconductive sheet may comprise a base of " Cellophane, " (Registered Trade Mark) P.V.C., paper or metal, and a photoconductive layer of sulphur, selenium compounds, zinc oxide or sulphide, anthracene or polynuclear cyclic hydrocarbons and the base and layer may be bound with cellulose, cellulose ester, polyvinyl chloride, polyesters, polyamides, polycarbonates, &c. Before the sheet is fixed an electrostatic insulating powder, e.g. glass dust, may be applied to the image areas and a second image from a second original formed using a different dye which does not adhere to the insulating material. The insulating material is removed prior to fixing. The apparatus of Specification 904,942 is described as being suitable for the process of this invention.
GB3444460A 1959-10-22 1960-10-07 Improvements in or relating to the preparation of hectographic printing master sheets Expired GB904941A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1959R0026586 DE1153769C2 (en) 1959-10-22 1959-10-22 Process for the production, renewal and printing of xerographically produced hectographic printing forms

Publications (1)

Publication Number Publication Date
GB904941A true GB904941A (en) 1962-09-05

Family

ID=7402230

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3444460A Expired GB904941A (en) 1959-10-22 1960-10-07 Improvements in or relating to the preparation of hectographic printing master sheets

Country Status (2)

Country Link
DE (1) DE1153769C2 (en)
GB (1) GB904941A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3253913A (en) * 1960-10-13 1966-05-31 Eastman Kodak Co Process for color electrophotography

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2297691A (en) * 1939-04-04 1942-10-06 Chester F Carlson Electrophotography

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3253913A (en) * 1960-10-13 1966-05-31 Eastman Kodak Co Process for color electrophotography

Also Published As

Publication number Publication date
DE1153769B (en) 1963-09-05
DE1153769C2 (en) 1973-05-30

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