DE965547C - Magnetic flat holding device for flexible photographic support - Google Patents

Magnetic flat holding device for flexible photographic support

Info

Publication number
DE965547C
DE965547C DESCH18408A DESC018408A DE965547C DE 965547 C DE965547 C DE 965547C DE SCH18408 A DESCH18408 A DE SCH18408A DE SC018408 A DESC018408 A DE SC018408A DE 965547 C DE965547 C DE 965547C
Authority
DE
Germany
Prior art keywords
magnetic
flat
piece
flexible photographic
cameras
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
DESCH18408A
Other languages
German (de)
Inventor
Heinz Schackert
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DESCH18408A priority Critical patent/DE965547C/en
Application granted granted Critical
Publication of DE965547C publication Critical patent/DE965547C/en
Expired legal-status Critical Current

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
    • G03B27/58—Baseboards, masking frames, or other holders for the sensitive material
    • G03B27/582—Baseboards, easels

Description

Patentansprüche: „Patent claims: "

1. Planhaltevorrichtung für flexible photographische Schichtträger (Filme) in Kameras1. Flat holding device for flexible photographic Supports (films) in cameras

u. dgl., bei der sich der Schichtträger mittels einer auf ihn aufgebrachten, auf magnetische Kraftlinien ansprechenden Rückschiebt gegen eine magnetische Planfläche legt, dadurch gekennzeichnet, daß die magnetische Planfläche (a) aus einem einzigen Stück Magnetmaterial besteht.and the like, in which the layer support lies against a magnetic plane surface by means of a push-back device applied to it and responsive to lines of magnetic force, characterized in that the magnetic plane surface (a) consists of a single piece of magnetic material.

2. Planhaltevorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Oberfläche der magnetischen Planfläche (a) in Einzelflächen (b) . aufgeteilt und wechselpolig magnetisiert ist.2. Flat holding device according to claim 1, characterized in that the surface of the magnetic flat surface (a) in individual surfaces (b). is divided and magnetized with alternating polarity.

In Betracht gezogene Druckschriften:Considered publications:

USA.-Patentschrift Nr. 2604831.U.S. Patent No. 2604831.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

© 609 527/247 5.56 (709 534/162 6. 57)© 609 527/247 5.56 (709 534/162 6. 57)

Claims (1)

Die Erfindung betrifft eine Planhaltevorrichtung für flexible photographische Schichtträger in Kameras od. dgl., bei der sich der Schichtträger mittels einer auf ihn aufgebrachten ferromagnetischen Rückschicht gegen eine magnetische Planfläche legt.The invention relates to a flat holding device for flexible photographic support in Cameras or the like, in which the substrate is moved by means of a ferromagnetic Backing layer lays against a magnetic flat surface. Es wurde bereits vorgeschlagen, die Planhaltung der Schichtträger in einer Kamera magnetisch zu erreichen, wobei U-förmige Einzelmagnete in dieIt has already been proposed to keep the planarity of the substrate in a camera magnetic Achieve, with U-shaped individual magnets in the ίο Rückwände von Spezialkameras fest eingebettet sind.ίο The back walls of special cameras are firmly embedded are. Die vorliegende Erfindung betrifft wesentliche Verbesserungen zur praktischen Verwirklichung der magnetischen Planhaltung und gestattet dieThe present invention relates to substantial improvements for practical implementation magnetic planning and allows the Anwendung dieses Prinzips in jeder handelsüblichen Kamera ohne Konstruktionsänderungen der bisherigen Modelle. Dies wird gemäß der Erfindung dadurch erreicht, daß die magnetische Planfläche aus einem einzigen Stück Magnetmaterial besteht. Zur Steigerung der magnetischen Leistung kann die Oberfläche dieser aus einem Stück bestehenden magnetischen Planflächen der wechselpoligen Magnetisierung entsprechend in Einzelfelder aufgeteilt werden. Die erfmdungsgemäß ausgeführten magnetischen Planflächen zeichnen sich durch ihre auffallend geringe Bauhöhe besonders aus. Erst dadurch ist es möglich, in Kameras jeder Größe, in Filmkassetten usw. einfach die übliche Filmandruckplatte durch eine magnetische Planfläche zu ersetzen, die dann einen zweckentsprechend vorbereiteten flexiblen photographischen Schichtträger in der Bildebene absolut plan hält.Use of this principle in any commercially available camera without any design changes of the previous models. This is achieved according to the invention in that the magnetic Flat surface consists of a single piece of magnetic material. To increase the magnetic Power can be achieved by the surface of these one-piece magnetic flat surfaces alternating polar magnetization can be divided into individual fields accordingly. According to the invention executed magnetic flat surfaces are characterized by their noticeably low overall height especially off. Only then is it possible to use it in cameras of any size, in film cassettes, etc. simply to replace the usual film pressure plate with a magnetic flat surface, which then has a appropriately prepared flexible photographic support in the image plane absolute keeps plan. Die Zeichnung veranschaulicht schematisch ein Ausführungsbeispiel des Erfindungsgegenstandes, worin darstelltThe drawing schematically illustrates an embodiment of the subject matter of the invention, where represents Fig. ι eine aus einem Stück bestehende Planfläche aus geeignetem Magnetmaterial a, die entsprechend den gezeigten Feldern b wechselpolig magnetisiert ist,Fig. Ι a one-piece flat surface made of suitable magnetic material a, which is magnetized with alternating polarity in accordance with the fields b shown, Fig. 2 einen Teilausschnitt derselben in abgewandelter Ausführung.2 shows a partial section of the same in a modified embodiment. Die Magneti-sierungsart ist für die Ausführungsform der magnetischen Planfläche nicht ausschlaggebend. Eine Erhöhung der magnetischen Leistung kann erzielt werden, wenn an den Grenzpunkten c der wechselpoligen Magnetisierung die aus einem Stück bestehende magnetische Planfläche α an der Oberfläche nach Fig. 2 durch Einfräsungen oder Einschnitte.aufgeteilt wird.The type of magnetization is not decisive for the embodiment of the magnetic plane surface. An increase in the magnetic power can be achieved if, at the boundary points c of the alternating-polar magnetization, the one-piece magnetic plane surface α on the surface according to FIG. 2 is divided by millings or incisions. Eine erfindungsgemäß ausgestattete Kamera oder Filmkassette ermöglicht, flexible photographische Schichtträger, die für die magnetische Planhaltung hergerichtet sind, in der Bildebene absolut plan zu halten.A camera or film cassette equipped according to the invention enables flexible photographic Layer supports, which are prepared for magnetic plan maintenance, are absolutely flat in the image plane keep.
DESCH18408A 1953-11-15 1953-11-15 Magnetic flat holding device for flexible photographic support Expired DE965547C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DESCH18408A DE965547C (en) 1953-11-15 1953-11-15 Magnetic flat holding device for flexible photographic support

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH18408A DE965547C (en) 1953-11-15 1953-11-15 Magnetic flat holding device for flexible photographic support

Publications (1)

Publication Number Publication Date
DE965547C true DE965547C (en) 1957-06-13

Family

ID=7428215

Family Applications (1)

Application Number Title Priority Date Filing Date
DESCH18408A Expired DE965547C (en) 1953-11-15 1953-11-15 Magnetic flat holding device for flexible photographic support

Country Status (1)

Country Link
DE (1) DE965547C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1098632B (en) * 1958-03-12 1961-02-02 Heinz Schackert Process for the production of rigid, flat permanent magnet plates of larger dimensions
DE1156629B (en) * 1958-02-01 1963-10-31 Bosch Gmbh Robert Disengageable permanent magnetic clamping or holding device
DE19680109T1 (en) * 1996-01-30 1998-05-20 Aichi Steel Works Ltd Magnetic attachment with multi-pole distribution
US6229417B1 (en) 1999-02-23 2001-05-08 Rockwell Technologies, Llc Operator for an electromagnetic switching device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604831A (en) * 1950-08-16 1952-07-29 Gen Electric Magnetic film holder for cameras

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604831A (en) * 1950-08-16 1952-07-29 Gen Electric Magnetic film holder for cameras

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1156629B (en) * 1958-02-01 1963-10-31 Bosch Gmbh Robert Disengageable permanent magnetic clamping or holding device
DE1098632B (en) * 1958-03-12 1961-02-02 Heinz Schackert Process for the production of rigid, flat permanent magnet plates of larger dimensions
DE19680109T1 (en) * 1996-01-30 1998-05-20 Aichi Steel Works Ltd Magnetic attachment with multi-pole distribution
US6229417B1 (en) 1999-02-23 2001-05-08 Rockwell Technologies, Llc Operator for an electromagnetic switching device

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