US1904113A - Film for photographic purposes - Google Patents

Film for photographic purposes Download PDF

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Publication number
US1904113A
US1904113A US56241131A US1904113A US 1904113 A US1904113 A US 1904113A US 56241131 A US56241131 A US 56241131A US 1904113 A US1904113 A US 1904113A
Authority
US
United States
Prior art keywords
film
gelatine
celluloid
photographic
coating
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
Other languages
English (en)
Inventor
Adamson Andrew George
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.)
WM Still and Sons Ltd
Original Assignee
Still & Sons Ltd W M
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
Priority claimed from GB2740730A external-priority patent/GB378394A/en
Application filed by Still & Sons Ltd W M filed Critical Still & Sons Ltd W M
Application granted granted Critical
Publication of US1904113A publication Critical patent/US1904113A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03C1/00—Photosensitive materials
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/795—Photosensitive materials characterised by the base or auxiliary layers the base being of macromolecular substances
    • 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
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/92—Fire or heat protection feature
    • Y10S428/921—Fire or flameproofing
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31725—Of polyamide
    • Y10T428/31768—Natural source-type polyamide [e.g., casein, gelatin, etc.]

Definitions

  • the object of the present invention is to provide an' improved photographic film of non-inflammable character adaptedrparticularly for use in kinematographlc apparatus.
  • a non-inflammable photographic film for use in kinematographic apparatus has long been sought, but so far, all such films as have satisfied requirements regarding non-inflammability have been defective in some other respect, the most general defects being brittleness or lack of permanent iiexibility and a tendency to react with the chemical constituentslofi the photographic image, which is thus spoi e
  • a film embodying this invention which is non-inflammable, exible, transparent, substantially colorless and free of any danger of affecting the photographic image, is illustrated by the attached drawing, showing the same in longitudinal section on a greatly enlarged scale.
  • Said lm according to the invention consists in a thin core layer 1 of insoluble gelatine, coated on each s1de with a thin layer or coating 2 of rubber, which inits turn is covered with an outer layer or coating 3 of celluloid, collodion or other varnish.
  • the purpose of the layers of rubber and varnish is to provide a complete inseparable q coating protecting the central o r core film from any action by water or the various salts used in the development and fixing of the photographi image, and adapted tonreceive on one side the sensitized emulsion without risk of the hotographic image bein detrimentally aiiiected.
  • the completed lm although it has a coating of a highly infiammable character such as celluloid, remains non-iniiammable, that is to say, when a ame is applied to the film or it is hghl heated, all that happens is that the film cur s up and hardens but does not ignite.
  • the gelatine film may be drawn -tlhough alcohol before being subjected to .ummm Groen manson, orA LoNnoN, ENGLAND, assrenoa To w.n.'s'r1r.r. a'soNs
  • .ummm Groen manson orA LoNnoN, ENGLAND, assrenoa To w.n.'s'r1r.r. a'soNs
  • the gelatine is extruded or delivered throng a suitable die onto the 'metal band at av temperature only a few. degrees above its v setting point and under such pressure 'as the speed of the moving metal band may re planetary.
  • the metal band before it reaches the' ie, is cooled considerably below the setting point of the gelatine, so that the surface of the gelatine in contact with the cooll metal will set uickly and prevent flooding, while the main bulk of the gelatine will remainliuid enough 111g itronthrough the cooling chamber to finally set-the whole.
  • the gelatine supportin metal band is next high treated with a solution of wax in benzole or the like, so that after the gelatinefilm has been finally dried, it can be easily stripped olf.
  • the film of gelatinel is then thinly surface ofthe coated on both sides with rubber varnish, which may consist of a small percentage pressure rollers to ensure a brig t surface y polished anddried, the .film may be passed' between ig l polished 100 and improve the adhesion of the separate layers.
  • the outer protecting medium a solution of celluloid such as now used in making films, because althouoh highly inflammable in itself, it imparts to t e I film, surfaces having the same other characteristics as an ordinary Celluloid film.
  • Collodion varnish may be used instead of celluloid varnish, as the outer coating.
  • the set gelatine film may bedraWn through or immersed in an aqueous or alcoholic solution of formaldehyde or other agent which also will renderit insoluble without reducing its transparency or flexibility.
  • a coat of sensitized gelatine .emulsion can be applied to a film according to this invention in the ordinary Way and the film can then be dealt -vvith in the same vvay as a celluloid film Without risk of the ultimate photo graphic image being affected, or of the coatings of rubber and celluloid separating from each other or from thegelatine core, while p the transparency, fiexibility, colourlessness and durability of the film are adequate for all ordinary purposes.
  • a non-inflammable photographic film which consists of a .core layer of gelatine, rendered insoluble and coated on each side first with rubber a-nd'then with another protecting medium such as celluloid.
  • a non-inflammable photographic film comprising a core layer of gelatine, rendered insoluble by asubstance, and having a coating of rubber varnish on each-side with an outer coating-of another protective medium such as celluloid thereon.
  • a non-inflammable film for photographic purposes which consists of a core consists in first forming a core layer of gelatine from a warm aqueous solution contain- 'mable film for photographic purposes, which consists in first forming a core layer of gelatfne from a warm aqueous solution contain- ⁇ inga small proportion of form'aldehydeand a trace of glycerine, coolin and drying the gelatine core layer, coating oth sides thereof with a rubber varnish, and then coating the same with a Celluloidvarnish.
  • a non-infiammable photographic filmh which consists of a core layer of gelatine, rendered insoluble by formaldehyde and i coated on each side first with rubber and then with another protecting medium such as celluloid.

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
US56241131 1930-09-13 1931-09-11 Film for photographic purposes Expired - Lifetime US1904113A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1904113X 1930-09-13
GB2740730A GB378394A (en) 1931-03-05 1931-03-05 Improvements in or relating to films for photographic purposes

Publications (1)

Publication Number Publication Date
US1904113A true US1904113A (en) 1933-04-18

Family

ID=26258794

Family Applications (1)

Application Number Title Priority Date Filing Date
US56241131 Expired - Lifetime US1904113A (en) 1930-09-13 1931-09-11 Film for photographic purposes

Country Status (4)

Country Link
US (1) US1904113A (de)
DE (1) DE565378C (de)
FR (1) FR721911A (de)
NL (2) NL58252B (de)

Also Published As

Publication number Publication date
FR721911A (fr) 1932-03-09
NL31823C (de) 1900-01-01
NL58252B (de) 1900-01-01
DE565378C (de) 1932-11-29

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