DE368552C - Holding device for the originals to be recorded in reproduction machines - Google Patents
Holding device for the originals to be recorded in reproduction machinesInfo
- Publication number
- DE368552C DE368552C DEK82039D DEK0082039D DE368552C DE 368552 C DE368552 C DE 368552C DE K82039 D DEK82039 D DE K82039D DE K0082039 D DEK0082039 D DE K0082039D DE 368552 C DE368552 C DE 368552C
- Authority
- DE
- Germany
- Prior art keywords
- originals
- holding device
- recorded
- reproduction machines
- sheet
- 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
- G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
- G03B27/52—Details
- G03B27/62—Holders for the original
- G03B27/6207—Holders for the original in copying cameras
- G03B27/6214—Copy boards
Description
Originale, die reproduziert werden sollen und dabei nicht beschädigt werden-dürfen, werden bisher dadurch auf einer Unterlage befestigt, daß man diese siebartig durchlöchert und zu einer Wand eines Kastens macht, in welchem ein verminderter Luftdruck unterhalten wird.Originals that are to be reproduced and must not be damaged in the process previously attached to a base by perforating it like a sieve and closing it a wall of a box in which a reduced air pressure is maintained.
Billiger herzustellen und zu betreiben ist die Vorrichtung, die den Gegenstand der Erfindung bildet. Sie beruht auf der anziehenden Wirkung statischer Elektrizität.The device which is the subject of the invention is cheaper to manufacture and operate forms. It is based on the attractive effect of static electricity.
Die Unterlage, auf der das zu reproduzierende Blatt befestigt wird, besteht aus einer dielektri- ;chen Platte, z. B. einer ebenen Glasscheibe. Die Rückseite dieser Platte ist mit einem elektrischen Leiter, z. B. Blattzinn, überzogen, und Iieser Leiter steht mit dem einen Pol einer Quelle lochgespannter Elektrizität in Verbindung, leren zweiter Pol zur Erde abgeleitet ist. Wenn nan nun das zu reproduzierende Blatt auf die Vorderseite der dielektrischen Platte legt, so miä in dem Blatt Elektrizität induziert, und man das Blatt mit der Hand feststreicht, so leitet diese die Elektrizitätsmenge, deren Polarität dieselbe'ist wie die, mit der die Rückseite der dielektrischen Platte geladen ist, zur Erde ab, und das Blatt wird durch die Anziehung der. entgegengesetzten polaren Elektrizitäten festgehalten.The base on which the sheet to be reproduced is attached consists of a dielectric plate, e.g. B. a flat sheet of glass. The back of this plate is connected to an electrical conductor, e.g. B. tin leaf, coated, and this conductor is connected to one pole of a source of hole-tensioned electricity, the second pole of which is diverted to earth. If you now place the sheet to be reproduced on the front side of the dielectric plate, you induce electricity in the sheet, and you rub the sheet with your hand, this conducts the amount of electricity, the polarity of which is the same as that with which the reverse side the dielectric plate is charged, down to earth, and the sheet is attracted by the. opposite polar electricity.
In der Zeichnung ist eine derartige Vorrichtung schematisch dargestellt. Dem photographischen Apparat a steht die dielektrische Platte b gegenüber, deren Rückseite mit der leitenden Schicht c überzogen ist. Diese ist leitend mit dem einen Pol einer Influenzmaschine d verbunden, die durch einen Elektromotor e angetrieben wird.Such a device is shown schematically in the drawing. Opposite the photographic apparatus a is the dielectric plate b , the back of which is coated with the conductive layer c. This is conductively connected to one pole of an induction machine d , which is driven by an electric motor e .
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEK82039D DE368552C (en) | Holding device for the originals to be recorded in reproduction machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEK82039D DE368552C (en) | Holding device for the originals to be recorded in reproduction machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE368552C true DE368552C (en) | 1923-02-06 |
Family
ID=7234367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEK82039D Expired DE368552C (en) | Holding device for the originals to be recorded in reproduction machines |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE368552C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2742814A (en) * | 1952-02-16 | 1956-04-24 | Western Electric Co | Electrostatic copy holder |
-
0
- DE DEK82039D patent/DE368552C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2742814A (en) * | 1952-02-16 | 1956-04-24 | Western Electric Co | Electrostatic copy holder |
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