DE1955758U - FILM MAGAZINE FOR FILM-RECORDING CAMERAS. - Google Patents

Description

The innovation relates to an "improvement in movie recording cameras Pilm magazines to be used, where the Eeibung between the Ulm and / or the coil core and the magazine housing, and a smoother, softer circulation is achieved.

In all known types of IT film magazines, the between the. Film and / or the bobbin and parts of the Magazine housing or the film guides resulting. forces have an adverse effect on the film itself and on its movement, especially since the film for a relatively long time with relatively high speed, intermittent movement «To remedy this the disadvantages caused by Abibung has been proposed to the inner surfaces of the pilm magazine with a

Target lubricant to strand. When using more common Lubricant, however, is the one on the film Emulsion layer chemically attacked and damaged by the lubricant.

The innovation "aims to remedy these disadvantages and the ! Frictional forces between the film or spool core and magazine parts reduce to a minimum. For this purpose, a lubricant had to be found that did not have any detrimental effects Effects on the Ulm and its photographic Shifts.

These goals · are achieved according to the innovation, by application a solution of the sodium salt of an alkyl sulfate ester of the general formula BOSOvHa, in which S is an unbranched aliphatic hydrogen group with 8 to 18 carbon atoms represents.

By applying the sodium salt of such an alkyl sulfate ester on the inner surfaces of the magazine and on the end surfaces of the spool cores one achieves a softer and smoother running of the film without affecting the film surfaces or the emulsion layer is damaged.

For a better understanding of the innovation, possible embodiments are described with reference to the drawings.

Mg. 1 is a partially cut-away side view of a Magazines according to the innovation "

FIG. 2 is a section along the line II-II in FIG. 1.

Fig. J shows the two-part open magazine of a double

$ - ■■ - - teren Embodiment.

The magazine 1 "consists of two housing halves, the housing parts 2 and 3> by means of the superimposed cross edge parts 2a and Yes light-tightly connected to each other wen to. The an 8 similar magazine has a substantially circular Abspulabteil 1a for the new film and a similar Aufspulabteil 1b for the exposed PiIm. In the center of the Abspulabteiles -1a, the housing parts 2 and 3 have hollow concentric pins 2b and 3 "b as the axis of rotation for the coil core. 4a. Similar pins 2c and 3g are provided in the winding compartment 1b for the bobbin core 4b.

On the pin 2b, a friction ring 12a is arranged between the housing part 2 and the coil core 4a, the one causes slight braking of the free rotation of the coil core 4a. The pin 2c carries an identical friction ring 12b. "■

The film outlet 5 on the side of the unwinding compartment 1a is formed by the parallel guide rails 5-a and 5h. The film entrance 6 on the side of the winding compartment 1b is formed by the guide strips 6a and 6b. The exposure range is between film 5 and films in step 6 surface 7 · The film runs from the spool over the curved guide surface 8 to the film exit 5. · In the take-up compartment 1b is a guide pin 9 behind the guide strip 6b intended. The guide strips 5a 5 5 ″ b »6a and 6b grip

into each other with corresponding strips on the housing part 2, so-that a light-tight closure is created.

The film magazine is in. The dashed lines in Fig. 1 indicated film camera inserted and the PiIm is by a gripper engaging the film perforations intermittently driven. The spool core 4b is also driven by the camera mechanism, wherein, a friction clutch-one Slip between the drive mechanism and the bobbin 4b. allowed. ,. "

According to the hiring, the inner surfaces of the housing parts 2 and -5, those outer surfaces of the spool cores 4a and 4b that come into contact with magazine surfaces, and the film guide parts., Wi-e 8 .. and 9 ₅ with layers 11 of the latrium salt mentioned Coated alkyl sulfate ester. As a result, the frictional forces between the film 1 o or the coil cores 4a and 4b and the inner surfaces of the housing parts 2 and 5 are considerably reduced without damage to the mushroom emulsion occurring. The layers 11 can be applied to the entire inner surface of the magazine. It is: however, desirable to use such layers only in the pilm inlet 6 and in the winding compartment 1b. Preferably, the layer 11 is applied to a circular area, the diameter of which, as in Pig. 3, corresponds approximately to the film fully wound on the spool core 4b. With this version, the film remains free of powdery particles of the application compound, which can come off when the Earnera is working.

In the embodiment of FIG. 3 is. the curved guide surface 8 is replaced by the guide pin 1J and instead of the training rings 12a and 12b, the spring 14 is provided. -: _ -

As an effective lubricant can recently z. B. the following substances are used: sodium salt of lauryl sulfate, of Ootylsulfate, of Myristylsulfate, des Cetyl sulfate, des; Deoyl sulfates and: of Ootadeoyl sulfates As a solvent for these substances, alcohols, "wi © Methanol and ethanol or water can be used.

Through the "special-level measure", the ^ iIm can with be transported more easily and smoothly and is not ohemisoh attacked by the lubricant.

Of course, the inflation is not due to the. shown Embodiments or magazines limited.

Claims (4)

1. Magazine for Filmaufnähmekämeras, characterized in that the entire inner surfaces of the magazine or parts of these, in particular parts on which ^{heating occurs through contact with the S 1} Um or the film spoolη, have a coating of sodium salt of an alkyl sulfate ester of the general formula EOSCUlTa, in which E is an unbranched aliphatic ^ hydrocarbon group with 8 Ms 18 C atoms. . . 2 »magazine according to claim 1, characterized in that the inner surfaces of the winding compartment (Ib) and its JiImführungeinrichtungen coated with the sodium alkyl sulfate ester are. 3 »Magazine according to claim 1, characterized in that only the surfaces of the two housing parts (2, 3) with the sodium alkyl sulfate ester are coated, which in extension and diameter are approximately dem.completely wound Mim correspond (Fig. 3). 4. Magazine according to claim 1 to 3 _S, characterized in that the hoist pulls (11) applied to reduce friction consist of the sodium salt of lauryl sulfate, octyl sulfate, myristyl sulfate, _ oetyl sulfate, decyl sulfate or octadecyl sulfate.