DE803978C - Process for producing contact points on image and sound recording media - Google Patents
Process for producing contact points on image and sound recording mediaInfo
- Publication number
- DE803978C DE803978C DEP5912A DEP0005912A DE803978C DE 803978 C DE803978 C DE 803978C DE P5912 A DEP5912 A DE P5912A DE P0005912 A DEP0005912 A DE P0005912A DE 803978 C DE803978 C DE 803978C
- Authority
- DE
- Germany
- Prior art keywords
- contact points
- image
- recording media
- sound recording
- producing contact
- 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
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
- G03D15/00—Apparatus for treating processed material
Description
Verfahren zum Herstellen von Kontaktstellen auf Bild- und Tonaufzeichnungsträgern Bei Bildfilmen und Tonaufzeichnungsträgern, insbesondere bei band- oder fadenförmigen Magnetogrammträgern aus Kunststoff, ist es häufig erforderlich, elektrisch leitende Kontaktstellen anzubringen, um irgendwelche Schaltvorgänge auszulösen. Diese Kontaktstellen bestehen üblicherweise aus aufgeklebten Metallfolien oder auch aus aufgestrichenen Stellen aus wässerigen Aufschwemmungen von kolloidalem Graphit. Metallfolien sind dauerhaft und elastisch nur sehr schwer auf dem Träger zu befestigen, insbesondere wenn, wie bei bandförmigen iNfagnetogrammträgern, die Befestigung auf der glatten Rückseite des Bandes erfolgen muß. Die üblichen Kontaktstellen aus Graphit reiben sich verhältnismäßig schnell von der glatten Bandrückseite ab und haben dadurch den Nachteil veränderlichen, elektrischen Widerstandes und unsicherer Kontaktgebung. Erfindungsgemäß wird eine unlösbare Verbindung der Kontaktstelle auf dem Träger dadurch erreicht, daß die als Kontaktstelle oder als leitende Grundlage für eine galvanisch aufzubringende Kontaktstelle verwendete Graphitschicht nicht in der üblichen wässerigen Form verwendet wird, sondern in einer Verbindung mit einem Lösungsmittel, das den Aufzeichnungsträger löst und in denselben eindringt, wie z. B. Aceton, Butylalkohol usw. Nach dem Verdunsten der Lösungsmittel ist die Graphitschicht unlösbar in der Unterlage verankert, so daß sie sich weder direkt noch zusammen mit einem hierauf galvanisch niedergeschlagenen Metallüberzug, z. B. einer dünnen Silberschicht; auf keinen Fall von der glatten Unterlage ablösen kann. Zweckmäßig werden die Kontaktstellen in Form kurzer Trägerstücke hergestellt, die an der betreffenden Stelle des Aufzeichnungsträgers eingefügt werden und zu diesem Zweck beidseitig mit zum Verkleben vorpräparierten Enden versehen sein können. Bei -2%lagnetogrammträgern ist das Trägerstück auf der Tonseite außerdem wie beim üblichen Tonband mit der wirksamen Stahlpulverschicht präpariert.Process for producing contact points on image and sound recording media In the case of picture films and sound recording media, especially tape-shaped or thread-shaped Magnetogram carriers made of plastic, it is often necessary to be electrically conductive To attach contact points in order to trigger any switching processes. These contact points usually consist of glued-on metal foils or of painted-on foils Places from watery suspensions of colloidal graphite. Metal foils are permanently and elastically very difficult to attach to the carrier, in particular if, as with ribbon-shaped iNfagnetogram carriers, the fastening on the smooth Back of the tape must be done. Rub the usual graphite contact points relatively quickly from the smooth back of the tape and thus have the disadvantage of variable electrical resistance and unsafe contact. According to the invention there is a permanent connection of the contact point on the carrier achieved in that as a contact point or as a conductive basis for a Electroplated contact point not used in the usual graphite layer aqueous form is used, but in a combination with a solvent, which releases the recording medium and penetrates into the same, such as e.g. B. acetone, butyl alcohol etc. After the solvents have evaporated, the graphite layer is insoluble in the Pad anchored so that it is neither directly nor together with one on it electroplated metal coating, e.g. B. a thin layer of silver; on cannot detach from the smooth surface. The contact points are appropriate produced in the form of short carrier pieces, which at the relevant point on the recording medium inserted and for this purpose both sides to be glued pre-prepared ends can be provided. In the case of -2% magnetogram carriers, the carrier piece is On the clay side, as with the usual tape with the effective steel powder layer prepared.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP5912A DE803978C (en) | 1948-10-02 | 1948-10-02 | Process for producing contact points on image and sound recording media |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP5912A DE803978C (en) | 1948-10-02 | 1948-10-02 | Process for producing contact points on image and sound recording media |
Publications (1)
Publication Number | Publication Date |
---|---|
DE803978C true DE803978C (en) | 1951-04-16 |
Family
ID=7360296
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEP5912A Expired DE803978C (en) | 1948-10-02 | 1948-10-02 | Process for producing contact points on image and sound recording media |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE803978C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1108072B (en) * | 1957-04-11 | 1961-05-31 | Zeiss Ikon Ag | Cinema projector with anamorphic attachment |
-
1948
- 1948-10-02 DE DEP5912A patent/DE803978C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1108072B (en) * | 1957-04-11 | 1961-05-31 | Zeiss Ikon Ag | Cinema projector with anamorphic attachment |
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