DE399998C - Photographic and photomechanical copy frames - Google Patents

Photographic and photomechanical copy frames

Info

Publication number
DE399998C
DE399998C DEP45857D DEP0045857D DE399998C DE 399998 C DE399998 C DE 399998C DE P45857 D DEP45857 D DE P45857D DE P0045857 D DEP0045857 D DE P0045857D DE 399998 C DE399998 C DE 399998C
Authority
DE
Germany
Prior art keywords
photographic
photomechanical
copy
copy frames
filters
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
DEP45857D
Other languages
German (de)
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.)
POLYGRAPHISCHE GES
Original Assignee
POLYGRAPHISCHE GES
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 POLYGRAPHISCHE GES filed Critical POLYGRAPHISCHE GES
Priority to DEP45857D priority Critical patent/DE399998C/en
Application granted granted Critical
Publication of DE399998C publication Critical patent/DE399998C/en
Expired legal-status Critical Current

Links

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
    • G03C5/08—Photoprinting; Processes and means for preventing photoprinting
    • G03C5/10—Reflex-printing; Photoprinting using fluorescent or phosphorescent means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection-Type Copiers In General (AREA)

Description

Kopierrahmen für photographische und photomechanische Zwecke. Die Erfindung bezieht sich auf eine Vorrichtung zur Ausübung des Kopierverfahrens für photographische und photomechanische Zwecke, bei denen ein Farbfilter Verwendung findet, insbesondere auf Reflexbeiichtungsverfahren.Copy frames for photographic and photomechanical purposes. the The invention relates to an apparatus for performing the copying process for photographic and photomechanical purposes in which a color filter is used finds, especially on reflex treatment methods.

Es ist bekannt, beim Kopieren von flauen photographischen Negativen ein schwaches Gelbfilter vor das zu kopierende Negativ zu schalten, um durch Abfangen der kurzwelligen Lichtstrahlen eine kontrastreichere Kopie zu erzielen. Man wendet dazu Filter verschiedener Stärke entsprechend der Flauheit des jeweils zu kopierenden Negativs an. Die Benutzung solcher Filter ist indessen mit Schwierigkeiten verbunden, da die Filter leicht zerbrechlich sind und man stets verschiedene Filter verschiedener Stärke miteinander auswechseln muß.It is known when copying dull photographic negatives to place a weak yellow filter in front of the negative to be copied in order to intercept it to achieve a higher-contrast copy of the short-wave light rays. One turns in addition, filters of different strengths according to the slackness of the one to be copied Negatives. However, the use of such filters is associated with difficulties, since the filters are easily fragile and you always have different filters of different types Must exchange strength with each other.

Es ist ferner bekannt, zur Erzielung von Reflexkopien kurzwellige Strahlen absorbierende Filter zu verwenden (sog. Playertypie)i Um ein genaues Anliegen der wiederzugebenden Teile an das Kopierpapier zu erzielen, ist die Anwendung eines Kopierrahmens mit pneumatischem Verschluß erforderlich. Legt man indessen in einen Kopierrahmen gewöhnlicher Bauart ein Gelbfilter, welches bekanntlich aus einer oder mehreren Glasplatten besteht, so entstehen zwischen der Glasplatte des Kopierrahmens und dem Filter geringe Lufträume, welche eine Ablenkung der Lichtstrahlen, sogenannte Interferenzerscheinungen (Farbenringe), hervorrufen. Auch bei Benutzung des Reflexkopierverfahrens wurden bisher verschieden starke Filter benötigt, da die Vorlagen sehr verschiedenartig sein können, z. B. vergilbtes Papier, verschiedenfarbige Drucke usw.It is also known to achieve short-wave reflective copies Use radiation absorbing filters (so-called player type) i To a specific concern of the parts to be reproduced on the copy paper is the application of one Copy frame with pneumatic lock required. But if you put it in one Copier frame of the usual type a yellow filter, which is known from an or If there is several glass plates, the copy frame is created between the glass plate and the filter small air spaces, which deflect the light rays, so-called Cause interference phenomena (color rings). Even when using the reflex copying process Filters of different strengths were required up to now, as the templates are very different can be, e.g. B. yellowed paper, different colored prints etc.

Die Erfindung ersetzt die gewöhnliche Glasplatte des Kopierrahmens durch eine Filterscheibe, die fest in den Kopierrahmen eingebaut sein kann, wobei man die Einwirkung des Filters auf verschiedenartige Negative oder Vervielfältigungsvorlagen durch Änderung der Belichtung regelt. Dies kann durch Änderung der Belichtungszeit, Regulierung der Lichtstärke oder Wechseln des Abstandes der Lichtquelle geschehen.The invention replaces the usual glass plate of the copy frame through a filter disk, which can be permanently installed in the copier frame, whereby the effect of the filter on various types of negatives or copies regulates by changing the exposure. This can be done by changing the exposure time, Regulation of the light intensity or changing the distance of the light source is done.

Claims (1)

PATENT-ANsPRUcH: Kopierrahmen für photographische und photomechanische Zwecke, insbesondere zur Verwendung bei Reflexbelichtungsverfahren, gekennzeichnet durch eine die gewöhnliche Glasplatte des Kopierrahmens ersetzende Filterscheibe.PATENT CLAIM: Copy frames for photographic and photomechanical Purposes, in particular for use in reflex exposure processes, identified by a filter disc replacing the usual glass plate of the copy frame.
DEP45857D 1923-03-07 1923-03-07 Photographic and photomechanical copy frames Expired DE399998C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP45857D DE399998C (en) 1923-03-07 1923-03-07 Photographic and photomechanical copy frames

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP45857D DE399998C (en) 1923-03-07 1923-03-07 Photographic and photomechanical copy frames

Publications (1)

Publication Number Publication Date
DE399998C true DE399998C (en) 1924-07-31

Family

ID=7381310

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP45857D Expired DE399998C (en) 1923-03-07 1923-03-07 Photographic and photomechanical copy frames

Country Status (1)

Country Link
DE (1) DE399998C (en)

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