Sinar Ag Schaffhausen

Other

Carl Koch

Karl Gfeller

Rolf Meyer

Hans Carl Koch

Richard Zehnder

Hans-Carl Koch

A cassette having a housing with an opening for the light to penetrate when exposing a film sheet, loaded into the cassette, and also for the entry and exit of the film sheet when loading and unloading the cassette. For gripping the edges of the film sheet, inserted into the cassette, there are movable retaining members, which can be moved into ineffective positions outside the contours of the opening of the housing, to facilitate the entry and exit of the film sheet in a direction perpendicular to its plane. When the retaining members are moved into their effective positions, a pressure plate under the influence of a spring forces the film sheet, to be loaded into the cassette, against the retaining members, whereby the film sheet is held planar. Externally accessible actuators interact in the manner of rams with both the pressure plate and the retaining members such that at times when moving the actuators from an inactive into an active position, the pressure plate is forced away from the retaining members and the retaining members are moved into their ineffective positions, and vice versa.

Photographic cassette for manipulation and exposure of a light-sensitive

The inventive apparatus is useful for, e.g., loading individual film sheets into cassettes for professional-style cameras, in daylight. A cassette (53) is insertable into the lower region of a housing (50). A separating device (55) is disposed above the cassette (53), which separating device has a cavity (90) for accommodating a stack of sheet film sheets. The top of the cavity (90) can be closed off by a light protection slide (91). A disk-shaped separating organ (112) is disposed above a lower light protection slide (116) of the separating device (55), which separating organ (112) is displaceable, e.g. by rotation. If one opens the lower light protection slide (116) of the separating device (55) in tandem with the light protection slide (57) of the cassette (53), the separating organ (112) separates out the bottommost film sheet of the stack, whereby the sheet falls into the cassette (53). After the light protection slides (116, 57) are closed, the now loaded cassette (53) can be removed. A container (51) with a light protection slide (70) is provided, for loading the stack of sheet film into the cavity (90) of the separating device (55) in daylight. This container (51) is insertable into the housing at a location above the separating device (55). If one opens the light protection slide (70) of the container (51) and the upper light protection slide (91) of the separating device (55) in tandem, the sheet film stack from the container (51) falls out of the container (51) and into the separating device (55).

Apparatus for handling light-sensitive photographic sheet material in

Disclosed is an apparatus for separating a single sheet from a stack of several sheets having the same non-round shape and the same size. The apparatus comprises a container with a recess for holding the stack, a base located underneath the container having a dispensing opening, a separating element with an aperture for receiving the bottom sheet which is to be separated from the stack. The separating element is located between the container and the base and is essentially a flat disc, the thickness of which is smaller than the thickness of a single sheet of the stack. Structure is provided for the container relative to the separating element on an imaginary axis passing through the recess of the container. The dispensing opening of the base and the aperture of the separating element are capable of separating each bottom sheet from the stack and conveying the separated sheet into the dispensing opening of the base. The recess of the container and the aperture of the separating element conform essentially in shape and size to one another and are of the same shape and size of the sheets of the stack when viewed in the direction of the imaginary axis. The apparatus may be provided with at least one support element which is capable of supporting the bottom sheet of the stack and/or with a marking device for applying marks to the bottom sheet as it is separated and dispensed.

Apparatus to separate a single sheet from a stack of several similar

An apparatus permits, with the aid of an electronic calculator, the calculation of the spatial coordinates of object points of a motif scene to be photographed, and does so based upon the image points optically image inverted for the object points. The calculator is programmed so that, in accordance with Scheimpflug's Law, it generates output signals which correspond to an ideal setting of the film carrier and/or the lens carrier of the camera. By means of electro-optical and/or acoustical signal emitters, the ideal setting of the image and/or lens carriers, or the resetting required for the introduction of the ideal setting, are indicated to the photographer. For this purpose, the mechanical reset mechanisms for the film carrier and the lens carrier are connected to the actual-position signal emitters, which transmit actual-position signals to the calculator. The mechanical reset mechanisms can also be coupled to drive motors, which are controllable by the output signals of the calculator, and in each case automatically introduce the ideal-setting of the film and/or lens carrier ascertained by the calculator.

Apparatus for a photographic camera with lens and film carriers which

Apparatus for calculating and displaying and/or controlling exposure

A roll film (25) is guided behind a fixed light-path opening (22) in a housing 20 which limits the largest format of the pictures producible with the housing. Opposite areas of the light-path opening (22) may be covered up by two adjustable mask parts (51, 52) in order to change the picture window left open between the mask parts. Operating elements for the selection of the format of the picture window and its position within the light-path opening (22) are coupled with electro-mechanical transducers for producing electrical theoretical value signals. Electro-mechanical transducers (93, 94) for producing electrical actual-value signals are associated with the mask parts (51, 52). A reversible film travel apparatus (65-78) is connected with an electro-mechanical transducer (95) for producing electrical signals. All signals mentioned are fed to an electronic logical circuit module (130). A corrective film travel is controlled via signal outlets of the logical circuit module (130) for changing of the picture window, which with regard to direction and extent corresponds with the position change of that mask part (52) needed to change the picture window, which mask part (52) defines the second transverse edge of the picture window when viewed in the forward travel direction of the film (25). As a result, overlapping of successive latent pictures on film (25) as well as unused areas between these pictures will be prevented, even if the picture window is changed from one picture to another.

Apparatus for transporting or positioning of a strip-shaped

A roll film cassette facilitating the loading of film in ordinary light conditions without risk of exposure comprises a housing, a window adjacent one end of the housing, a film supply spool for unexposed film and a take-up spool for exposed film at the window end of the housing, and a reversing roller at the opposite end of the housing. The two spools are incorporated into a common spool-holder unit bodily attachable in and removable from the housing. The parts of the spool-holder unit for mounting the supply spool include a light-tight sleeve with an opening for the insertion and removal of the spool. The opening has a hinged door-like lid and an axial slot for the accommodation of a leader portion of the film.

Photographic apparatus for using roll films

In a photographic cassette camera having a cassette guide frame and an attachable ground-glass frame supporting a ground-glass for observation of a subject to be photographed, one of the grames defining an image field of the camera, a rear wall construction of the camera wherein the cassette guide frame has a support frame surrounded by lateral guide surfaces, the ground-glass frame having support runners which fit against the support frame in the guide surfaces for mounting the ground-glass parallel to the support frame, a bar-shaped exposure measuring probe having at one end an opto-electric transducer and being mounted on a holding device on one of the frames for sliding and pivotal movement adjacent one of the lateral support elements of the cassette guide frame, such one element and one of the adjacent support runners having recesses therein permitting movement of the probe between a selectively adjustable measuring position within the field on a front side of the ground-glass and a rest position completely out of the image field, the probe having a dimension perpendicular to the support plane which exceeds the ground-glass focal distance, and the probe engaging the recesses whenever it is adjusted for a measuring position.

Rear wall construction of a photographic cassette camera

The apparatus includes an image field limiting frame and at least one movable mask for the purpose of varying picture size in a line parallel to the direction of film travel and means to control film transport steps proportional to the picture window left open by the mask. It also includes means to directly transport the film in either the forward or reverse direction during picture size adjustment so that the forward edge of the film matches the forward edge of the picture window. In this manner, it is possible to execute picture size changes at anytime, even after operation of the film transport, without waste of film or overlap of sequential pictures.

Apparatus for varying picture size before or after film advance

An electrically controlled shutter device for a photograhic camera. The shutter device includes a shutter element which is mounted for movement for opening and closing a light admitting aperture of the camera. A drive mechanism causes the movement of the shutter element between its respective positions. An external trigger control provides for initiation of the opening and closing of the aperture during the exposure operation. A position monitoring mechanism is associated with the shutter element for providing a signal in dependence upon the shutter element being located in a predetermined position. A control mechanism is coupled to the output of the position monitoring mechanism and controls the operation of the shutter device as a function of the signal provided by the position monitoring mechanism and as a function of the signals from the external trigger control.

Shutter mechanism

A shutter device for a photographic camera has a pair of shutter blade members movable between first and second rest positions for opening or closing the camera aperture, including drive devices associated with the blade members for moving them in the same direction during an exposure sequentially and at a time interval, from the first to the second rest position. Additional drive devices associated with the shutter blade members are provided which, for a subsequent exposure, are capable of returning the blade members sequentially and at a time interval, in opposite direction, from the second to the first rest position.

Growing community of inventors

Stetten, Switzerland

Carl Koch