DE523752C - Device for copying negatives - Google Patents
Device for copying negativesInfo
- Publication number
- DE523752C DE523752C DEG78395D DEG0078395D DE523752C DE 523752 C DE523752 C DE 523752C DE G78395 D DEG78395 D DE G78395D DE G0078395 D DEG0078395 D DE G0078395D DE 523752 C DE523752 C DE 523752C
- Authority
- DE
- Germany
- Prior art keywords
- light
- negatives
- flaps
- copying
- shaft
- 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
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B27/00—Photographic printing apparatus
- G03B27/02—Exposure apparatus for contact printing
- G03B27/14—Details
- G03B27/28—Edge-masking devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Description
Es sind schon Apparate zum Kopieren mehrerer Negative von verschiedener Dichte bekannt, welche mit Lichtreguliervorrichtungen, z. B. durch Hoch- und Tiefstellung der Lampen in einem Lichtschacht, durch Querschieber verschiedener Dichte, durch elektrische Widerstände usw., versehen sind.There are already machines for copying several negatives of different densities known which with light regulating devices, e.g. B. by superscript and subscript the Lamps in a light shaft, through cross slides of different densities, through electrical ones Resistors etc. are provided.
Die Erfindung betrifft ebenfalls eine Kopiervorrichtung mit Lichtschacht, an dessenThe invention also relates to a copier with a light shaft on which
ίο Innenwänden nach der Erfindung mehrere Klappen von verschiedener Lichtdurchlässigkeit übereinander drehbar angebracht sind, um durch Verstellen oder Ubereinanderlegen dieser Klappen eine Lichtregelung zu erzielen. Der Erfindungsgegenstand ist in den Fig. ι bis 5 im Längsschnitt, Grundriß und Querschnitt dargestellt. Um eine Achse i (Fig. 3) im Lichtschacht p drehbare Klappen a, b mit verschiedener Lichtdurchlässigkeit können durch Übereinanderklappen (Fig. 4, a, b) oder auch durch beliebige Seitenverstellung (Fig. 5, d) so eingestellt werden, daß nicht nur eine beliebig starke Lichtabschwächung erfolgen kann, sondern auch eine einseitige Lichtabdeckung der Negative as (N, Fig. ι und 2), um die zu dichten Stellen im Negativ mit mehr Licht zu beschicken (Fig. 5, Lichtstrahl e) und um bei zu dünnen Negativstellen das Licht beliebig abdekken können (Fig. 4, a, b, /). So ist die Möglichkeit gegeben, aneinandergereihte Bildserien mittels einer einzigen Belichtung gleichmäßig und rasch fertigzustellen, ohne besondere Retusche für Abdeckung zu gebrauchen.ίο inner walls according to the invention several flaps of different light transmittance are rotatably mounted on top of each other in order to achieve a light control by adjusting or overlapping these flaps. The subject of the invention is shown in FIGS. 1 to 5 in longitudinal section, plan and cross section. About an axis i (Fig. 3) in the light shaft p rotatable flaps a, b with different light transmittance can be adjusted by folding over each other (Fig. 4, a, b) or by any lateral adjustment (Fig. 5, d) so that not only an arbitrarily strong light attenuation can take place, but also a one-sided light cover of the negatives as (N, Fig. ι and 2) in order to fill the dense areas in the negative with more light (Fig. 5, light beam e) and in order to thin negative areas can cover the light as desired (Fig. 4, a, b, /). This gives the opportunity to complete a series of images in a row by means of a single exposure evenly and quickly, without the need for special retouching for covering.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG78395D DE523752C (en) | Device for copying negatives |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG78395D DE523752C (en) | Device for copying negatives |
Publications (1)
Publication Number | Publication Date |
---|---|
DE523752C true DE523752C (en) | 1931-04-27 |
Family
ID=7136655
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEG78395D Expired DE523752C (en) | Device for copying negatives |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE523752C (en) |
-
0
- DE DEG78395D patent/DE523752C/en not_active Expired
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