US3512973A - Data storage systems - Google Patents

Data storage systems Download PDF

Info

Publication number
US3512973A
US3512973A US514176A US3512973DA US3512973A US 3512973 A US3512973 A US 3512973A US 514176 A US514176 A US 514176A US 3512973D A US3512973D A US 3512973DA US 3512973 A US3512973 A US 3512973A
Authority
US
United States
Prior art keywords
solution
media
ions
medium
reducing agent
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 - Lifetime
Application number
US514176A
Other languages
English (en)
Inventor
Jean-Paul Archambault
John Richard Manhardt
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.)
Northrop Grumman Guidance and Electronics Co Inc
Original Assignee
Itek Corp
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 Itek Corp filed Critical Itek Corp
Application granted granted Critical
Publication of US3512973A publication Critical patent/US3512973A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/58—Processes for obtaining metallic images by vapour deposition or physical development
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/148—Light sensitive titanium compound containing

Definitions

  • a process for recording information comprising exposing image-wise a photosensitive copy medium, contacting the medium with a developer comprising a solution of metal ions which are at least as strong oxidizing agents as ionic copper, and then contacting the copy medium with a reducing agent for the metal ions and wherein at least the solution of metal ions or the reducing agent solution contains a sulfur containing nonionic surfactant such as a thioether surfactant.
  • the invention also relates to the improved developer system used in the above process.
  • This invention relates to data storage systems. More precisely, the invention disclosed herein relates to data storage systems which include metal containing developer systems for retrieval of data stored in the media of the systems.
  • a principal object of the present invention is to provide an improved data storage system.
  • Another object of the present invention is to provide an improved data storage systemwhich includes a developer system of improved stability.
  • Still another object of the present invention is to provide an improved data storage system in which data is stored in media comprising photoconductive materials and retrieved therefrom by a developer system of improved stability.
  • the image storage system comprises media in which a photoconductor is a photosensitive component thereof. Said systems are described in more detail in commonly owned U.S. patent application Ser. No. 199,211, filed May 14, 1962, by E. Berman et a1., now abandoned.
  • media comprising radiation sensitive photoconductive materials such as zinc oxide, titanium dioxide, zinc sulfide, cadmium sulfide, indium oxide and the like are briefly exposed to a source of radiant energy. Such exposure establishes reversible image patterns in the media.
  • the image patterns can be retrieved by contacting at least the exposed portion of the media with a chemical redox system capable of reacting on contact with the exposed portions to deposit thereon, species of the redox system which can be interpreted either directly or subsequently by visual readout.
  • non-ionic surfactants which are useful in the practice of our invention are the non-ionic, sulfur containing surfactants known to the art generally as thioethers.
  • thioethers Especially preferred non-ionic thioethers are the polyethylene glycol tertdodecyl thioethers. Others will be mentioned hereinafter.
  • FIG. 1 illustrates in schematic fashion an arrangement of apparatus suitable for practicing our invention.
  • image patterns can be stored in image storage medium of the present invention, 12, by exposure thereof to exposure means 14.
  • Exposure means 14 include source 16 of activating radiation, transparency 18, comprising an information image pattern desired to be stored, and appropriate optical system 20, for focusing the image on medium 12.
  • image patterns can be stored in media of the present invention by exposure thereof to a source of radiation 16, having a wavelength such that the image storage media can absorb same. The best results are realized by exposing media of the present invention to light having a wavelength, between about 0.2 micron to about 0.5 micron.
  • media suitable in the practice of the present invention can oftentimes include sensitizers such as dyes which can alter the spectral response thereof, other sources can be used.
  • Suitable light sources include mercury arc lamps, tungsten arc lamps, photoflash lamps and the like.
  • the time of exposure will be determined primarily by such factors as the nature and strength of source 16 and the distance of the medium 12, from the source 16. Such factors are routine considerations normally encountered in conventional photographic processes. Thus, proper exposure time will be readily determined by one well skilled in the art. As an example, however, exposure times of considerably less than about 20 seconds and more often than not, less than about seconds are normally suitable.
  • tank 22 contains an aqueous or partially aqueous solution of a compound comprising silver, mercury, copper, gold or platinum, for example.
  • the application of the solution of tank 22 to medium 12 converts the image pattern therein to an irreversible form. Said irreversible image pattern is usually latent but oftentimes can be visible or partially visible.
  • Bath 24 comprises an aqueous or partially aqueous solution of a reducing agent for the compound in tank 22 such asmethylaminophenol sulfate or other suitable organic and inorganic photographic reducing agents.
  • a reducing agent for the compound in tank 22 such asmethylaminophenol sulfate or other suitable organic and inorganic photographic reducing agents.
  • Suitable reducing agents include hydroquinone or derivatives thereof, oand p-aminophenol, p-methylaminophenol sulphate (metal) p-hydroxyphenylglycine, oand p-phenylenediamine, l-phenyl-3-pyrazolidone and others which could be mentioned.
  • Suitable inorganic photographic reducing agents such as those comprising ferrous, titanous and vanadous ions can also be employed.
  • concentration of said reducing agent can vary over a wide range.
  • the reducing agent can be present in amounts from 0.5 percent by weight of solution to 40 percent by weight.
  • alkali metal sulfites preferably sodium sulfitecan be included in the solution of tank 24 to advantageously retard oxidation of the reducing agent.
  • the preferred concentration of said sulfite is from about 0.5 percent by weight of solution to saturation concentrations of amounts somewhat higher.
  • the solution of tank 24 comprises a nonionic surfactant.
  • the non-ionic surfactants suitable in the practice of the present invention include those which are known to the art as thioethers and conform to the following generic formula:
  • R is an alkyl radical with those having less than about 6 carbon atoms being preferred, or a polyhydric alcohol radical preferably having less than about 8 carbon atoms or polyoxyethylene glycol radical; S is sulfur and R is an alkyl radical preferably having less than about 14 carbon atoms.
  • suitable representative non-ionic thioethers include butyl dodecyl thioether, ethyl octyl thioether, propoyl heptyl thioether, methyl 3,4,5,6 tetrahydroxy hexyl thioether.
  • Suitable concentrations of the non-ionic surfactant include those ranging from about 0.01 percent by weight of solution to about 3 percent by weight but amounts less than about 1.0 percent are most suitable.
  • the solution of tank 24 can also contain an ionic surfactant, if desired.
  • the ionic surfactants suitable in the practice of our invention include those surfactants or dispersants which achieve dispersion by reason of the fact that they carry a charge which can be anionic or cationic in nature.
  • the most preferred ionic surfactants are those which are cationic in nature.
  • the following is a listing of some of the ionic surfactants suitable in the practice of the present invention:
  • Salts of primary alkylamines the hydrophobic alkylaryl radical of which possesses at least 8 carbon atoms or mixtures of these compounds;
  • Salts of primary alkylamines comprising a hydrophobic alkyl radical which possesses at least 8 carbon atoms, or mixtures of these compounds;
  • Suitable concentrations of the aforesaid surfactants range from 0.01 percent byweight of solution to about 3 percent by weight with amounts less than about 1 percent being most suitable.
  • Medium 12 is generally permitted to remain in contact with the solution of tank 24 for about 2 or 3 seconds but shorter or longer times can be suitably employed. After immersion in tank 24, additional processing steps can be applied to medium 12 such as Washing, fixing and the like.
  • non-ionic surfactant in the amplifying solution, e.g. tank 24 of FIG. 1, nevertheless, said surfactant can be included in tank 22 of FIG. 1, if desired, or in both tanks.
  • EXAMPLE 1 A three station, continuous photographic processor embodying the features of FIG. 1 was used to expose and develop media comprising titanium dioxide as the radiation sensitive component thereof.
  • Said media were prepared by continually coating a roll of single weight baryta paper with a dispersion comprising about 1 part by weight of acrylic resin to about 4 parts by weight of finely divided titanium dioxide.
  • the media were processed through the machine at a rate of about 10 feet per minute.
  • the media were first exposed through a transparency in the exposure station and then conveyed through two stations in which liquids were applied to the media.
  • the first liquid application station comprised a solution which contained about 34 grams AgNO in 1000 mls. of water.
  • the media were conveyed through a second liquid application station which comprised about 8.4 grams metol, about 1.4 grams of Nonic 218, a tertdodecyl thioether sold by Pennsalt Chemical Company, and 1000 mls. of water.
  • the solutions in each of the liquid application stations were continually replenished throughout the run. After treatment in each of the stations, the media were fixed in a conventional fashion. After 8 hours of continuous running, no mirroring and no substantial sludging is detected in either solution. At the conclusion of the run, the solutions in each station can be conveniently removed therefrom simply by flushing and washing the station with water.
  • R is chosen from the group consisting of alkyl radicals, radicals of polyhydric alcohols and polyethylene glycol radicals, S is sulfur and R is an alkyl radical.
  • non-ionic surfactant is a polyethylene glycol tertdodecyl thioether.
  • said solution of ions of metallic compounds comprises at least one member of the group consisting of silver ions, copper ions, gold ions, platinum ions, and mercury ions.
  • a process for recording information comprising exposing a photosensitive copy medium comprising a photoconductor, contacting the medium with a solution of ions of metallic compounds which can be reduced as easily as copper, and contacting the medium with a solution comprising a reducing agent for the ions of metallic compounds, the improvement wherein at least one of the solutions comprises a non-ionic thioether surfactant.
  • a developer composition comprising a solution which comprises a reducing agent for ions of metallic compounds which can be as easily reduced as copper and a non-ionic surfactant conforming to the following generic formula:
  • R is chosen from the group consisting of alkyl radicals, radicals of polyhydric alcohols and polyethylene glycol radicals; S is sulfur and R is an alkyl radical.
  • composition of claim 10 wherein said nonionic surfactant is a. polyethylene glycol tertdodecyl thioether.
  • composition of claim 10 wherein said nonionic surfactant is a tertdodecyl thioether.
  • composition of claim 10 wherein said solution comprises a photographic reducing agent for silver ions.
  • a developer composition comprising a solution which comprises a reducing agent for ions of metallic compounds which can be as easily reduced as copper, the improvement comprising adding to this solution a nonionic thioether containing surfactant.
  • R is an alkyl radical having less than about 6 carbon atoms or a polyhydric alcohol radical having less than about 8 carbon atoms and R is alkyl radical having less than about 14 carbon atoms.
  • a developer composition comprising a solution which comprises ions of metallic compounds which can :be reduced as easily as copper and a non-ionic surfactant conforming to the following formula:

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
US514176A 1965-12-16 1965-12-16 Data storage systems Expired - Lifetime US3512973A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US51417665A 1965-12-16 1965-12-16
US51420065A 1965-12-16 1965-12-16

Publications (1)

Publication Number Publication Date
US3512973A true US3512973A (en) 1970-05-19

Family

ID=27058122

Family Applications (2)

Application Number Title Priority Date Filing Date
US514176A Expired - Lifetime US3512973A (en) 1965-12-16 1965-12-16 Data storage systems
US514200A Expired - Lifetime US3512974A (en) 1965-12-16 1965-12-16 Data storage systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
US514200A Expired - Lifetime US3512974A (en) 1965-12-16 1965-12-16 Data storage systems

Country Status (7)

Country Link
US (2) US3512973A (enrdf_load_html_response)
BE (1) BE691093A (enrdf_load_html_response)
CH (1) CH483659A (enrdf_load_html_response)
DE (1) DE1572015A1 (enrdf_load_html_response)
FR (1) FR1504343A (enrdf_load_html_response)
GB (1) GB1160259A (enrdf_load_html_response)
NL (1) NL6617308A (enrdf_load_html_response)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1374547A (fr) * 1962-09-07 1964-10-09 Philips Nv Procédé pour la production photographique d'images métalliques
US3152903A (en) * 1959-04-30 1964-10-13 Minnesota Mining & Mfg Reproduction system
US3252798A (en) * 1958-10-11 1966-05-24 Philips Corp Stabilized physical developments

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3252798A (en) * 1958-10-11 1966-05-24 Philips Corp Stabilized physical developments
US3152903A (en) * 1959-04-30 1964-10-13 Minnesota Mining & Mfg Reproduction system
FR1374547A (fr) * 1962-09-07 1964-10-09 Philips Nv Procédé pour la production photographique d'images métalliques

Also Published As

Publication number Publication date
DE1572015A1 (de) 1970-01-02
US3512974A (en) 1970-05-19
CH483659A (fr) 1969-12-31
GB1160259A (en) 1969-08-06
FR1504343A (fr) 1967-12-01
NL6617308A (enrdf_load_html_response) 1967-06-19
BE691093A (enrdf_load_html_response) 1967-06-12

Similar Documents

Publication Publication Date Title
US3364024A (en) Photographic process
US3650749A (en) Photographic development
US3565632A (en) Hardening of gelatin
US3615513A (en) Inhibition of silvering in photographic processing solutions
GB1589593A (en) Light-sensitive silver halide photographic material and method of processing thereof
US3512973A (en) Data storage systems
US3453109A (en) Forming a relief by developing and hardening an exposed unhardened silver halide emulsion in the exposed areas with 3-pyrazolidones having hydroxymethyl substitution in the 4-position
JPH0564777B2 (enrdf_load_html_response)
US3311473A (en) Silver halide diffusion process and products therefor
US4467029A (en) Method for producing a photographic image from a Lippmann type silver halide photographic light-sensitive material
US3320064A (en) Non-silver halide light sensitive materials
US3554750A (en) Process for the production of photographic images
US3046130A (en) Photographic materials containing a chemical sensitizer
US3725068A (en) Process for the photographic development of silver salts
US3723126A (en) Photographic developers with titanous diethylenetriaminepentaacetic acid
US3021212A (en) Developers for photographic reversal processes
US3615521A (en) Photographic compositions and processes-a
US4400462A (en) Method for the formation of photographic images
US3353957A (en) Photographic process
US3222175A (en) Process for forming metallic nonsilver images
US3700442A (en) Developing agent precursors
US3547635A (en) Vacuum deposited light-sensitive titanium dioxide
US3645731A (en) Silver salt diffusion alkaline bath of trisodium phosphate and a polyalcohol
US3275440A (en) Process for developing photosensitized anodized aluminum plates
US3756822A (en) Photographic color processing monobaths