DE950258C - Roll film spool for 35mm cartridge - Google Patents

Roll film spool for 35mm cartridge

Info

Publication number
DE950258C
DE950258C DEV7881A DEV0007881A DE950258C DE 950258 C DE950258 C DE 950258C DE V7881 A DEV7881 A DE V7881A DE V0007881 A DEV0007881 A DE V0007881A DE 950258 C DE950258 C DE 950258C
Authority
DE
Germany
Prior art keywords
cartridge
roll film
film spool
spool
light
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
DEV7881A
Other languages
German (de)
Inventor
Heinrich Walter
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.)
Filmfabrik Wolfen VEB
Original Assignee
Filmfabrik Wolfen VEB
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 Filmfabrik Wolfen VEB filed Critical Filmfabrik Wolfen VEB
Priority to DEV7881A priority Critical patent/DE950258C/en
Application granted granted Critical
Publication of DE950258C publication Critical patent/DE950258C/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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/28—Locating light-sensitive material within camera
    • G03B17/30—Locating spools or other rotatable holders of coiled film
    • 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
    • G03B2217/00—Details of cameras or camera bodies; Accessories therefor
    • G03B2217/26—Holders for containing light-sensitive material and adapted to be inserted within the camera
    • G03B2217/261—Details of spools

Description

Die Erfindung betrifft eine Rollfilmspule für Kleinbildpatronen. Eine solche Filmspule hat in der Kleinbildpatrone bei den. bestehenden Normen erhebliches Spiel zwischen Spulenfansch und Patronenboden. Infolgedessen können durch Einspiegelung bei den bisherigen Spulenflanschen mit blanker Oberfläche Lichtmengen, die zur Schwärzung des Films ausreichen, so tief durch das Bodenloch der Patrone eindringen, daß sie die äußeren Filmlagen auf der Spule erreichen.The invention relates to a roll film spool for 35mm cartridges. One such film reel has in the 35mm cartridge with the. existing standards considerable Clearance between the spool flange and the cartridge base. As a result, by mirroring with the previous reel flanges with a bare surface, amounts of light that cause blackening of the film are sufficient to penetrate deep enough through the bottom hole of the cartridge that they reach the outer layers of the film on the spool.

Die Erfindung bezweckt, eine Spule zu scharen, die ein Eindringen, von Lichtstrahlen verhindert oder sie zum mindesten so stark zerstreut, daß eine schädliche Wirkung nicht mehr eintreten kann.The aim of the invention is to assemble a coil that prevents penetration, prevented by rays of light or at least scattered them so strongly that one harmful effect can no longer occur.

Dies geschieht erfindungsgemäß dadurch, da,B die dem Bodenloch der Patrone zugekehrte Oberfläche der Spulenflansche mattiert oder so gerillt ist, daß das einfallendea Licht zurückgeworfen wird.This is done according to the invention because, B the bottom hole of the Cartridge facing surface of the spool flange is matted or grooved so that the incident light is reflected back.

Die einfallenden Lichtstrahlen treffen bei solchen Spulen auf schräg zur Spulenachse liegende Rillenflächen der Flansche und werden unter ihrem Einfallswinkel an die innere Bodenfläche der Patrone reflektiert. Von dort werden sie wieder schräg nach der Öffnung im Boden abgelenkt. Die Rillen können z. B. konzentrisch oder spiralig angeordnet sein. Diese Lichtsicherung kann sowohl bei Metall- als auch bei Kunststoffspulen angewendet werden. Während bei Metall die Flansche im allgemeinen nachträglich bearbeitet werden müssen, entweder durch Mattierung (z. B. Sandstrahlung) oder durch Anbringung der geschilderten. Rillen, kann Kunststoffflanschen bei der Herstellung die gewünschte Oberflächenbeschaffenheit ohne Mehrkosten gegeben werden, entweder durch eine entsprechende Oberfläche der Gußform oder durch Anwendung einer besonderen Spritzmasse (z. B. durch Zusatz gewisser Füllstoffe); die eine rauhe Oberfläche ergibt.In such coils, the incident light rays strike at an angle Groove surfaces of the flanges lying to the coil axis and are at their angle of incidence reflected on the inner bottom surface of the cartridge. From there they become slanted again distracted after opening in the bottom. The grooves can e.g. B. concentric or spiral be arranged. This light fuse can be used with both metal and plastic reels be applied. While in the case of metal, the flanges are generally reworked need to be, either by matting (e.g. sandblasting) or by attachment the described. Grooves, plastic flanges can be used in the manufacture of the desired Surface quality can be given at no extra cost, either by a corresponding Surface of the mold or by using a special injection compound (e.g. by adding certain fillers); which gives a rough surface.

In der Zeichnung zeigt Abb. i den Strahlengang bei den bisherigen glattem. Spulenflanscheny während Abb. a als Beispiel eine Spule mit gerillter, dem Bodenloch zugekehrter Flanschenaußenseite darstellt, bei der die Strahlen durch Reflexion, wie im Bild dargestellt, zurückgeworfen werden.In the drawing, Fig. I shows the beam path for the previous ones smooth. Spulenflanscheny while Fig. A as an example a spool with grooved, represents the flange outside facing the bottom hole, in which the rays through Reflection as shown in the picture.

Claims (1)

PATENTANSPRÜCHE: i. Rollfilmspule für Kleinbildpatrone, dadurch gekennzeichnet, daB die dem Bodenloch der Patrone zugekehrte Oberfläche der Spulenflansche mattiert oder so gerillt ist, da.ß das Licht zurückgeworfen wird. z. Rollfilmspule nach Anspruch i, dadurch gekennzeichnet, daß die Flanschoberflächen durch Verwendung von Spritzmassen gebildet sind, die eine muhe Oberfläche ergeben, indem diesen z. B. Füllstoffe beigegeben sind. PATENT CLAIMS: i. Roll film reel for small picture cartridges, characterized in that the surface of the reel flange facing the bottom hole of the cartridge is matted or grooved in such a way that the light is reflected. z. Roll film reel according to claim i, characterized in that the flange surfaces are formed by the use of injection-molding compounds which result in a smooth surface by using these e.g. B. fillers are added.
DEV7881A 1954-10-06 1954-10-06 Roll film spool for 35mm cartridge Expired DE950258C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEV7881A DE950258C (en) 1954-10-06 1954-10-06 Roll film spool for 35mm cartridge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV7881A DE950258C (en) 1954-10-06 1954-10-06 Roll film spool for 35mm cartridge

Publications (1)

Publication Number Publication Date
DE950258C true DE950258C (en) 1956-10-04

Family

ID=7572082

Family Applications (1)

Application Number Title Priority Date Filing Date
DEV7881A Expired DE950258C (en) 1954-10-06 1954-10-06 Roll film spool for 35mm cartridge

Country Status (1)

Country Link
DE (1) DE950258C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128058A (en) * 1961-12-27 1964-04-07 Du Pont Plastic casing for photographic film spools having light-absorbing baffles
US5557368A (en) * 1994-05-17 1996-09-17 Brother Kogyo Kabushiki Kaisha Toner level detecting device and method for detecting toner level within a toner storage box
US5697014A (en) * 1995-12-28 1997-12-09 Brother Kogyo Kabushiki Kaisha Toner level detecting device having a substantially non-uniform width and toner storage box having same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128058A (en) * 1961-12-27 1964-04-07 Du Pont Plastic casing for photographic film spools having light-absorbing baffles
US5557368A (en) * 1994-05-17 1996-09-17 Brother Kogyo Kabushiki Kaisha Toner level detecting device and method for detecting toner level within a toner storage box
US5697014A (en) * 1995-12-28 1997-12-09 Brother Kogyo Kabushiki Kaisha Toner level detecting device having a substantially non-uniform width and toner storage box having same
US5761585A (en) * 1995-12-28 1998-06-02 Brother Kogyo Kabushiki Kaisha Cap for toner fillable container and toner fillable container using same
US5771427A (en) * 1995-12-28 1998-06-23 Brother Kogyo Kabushiki Kaisha Blow-moled toner fillable cartridge and a method for forming same

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