DE2638294A1 - RUNNING IMAGE PROJECTOR WITH A FILM CHANNEL - Google Patents

Abstract

In cine projectors, it is difficult for a film loop to be withdrawn from the film channel for the purpose of processing. In accordance with the invention, it is proposed to provide in the film channel a switch (13) which can be operated manually when required so that a film loop (F') runs out automatically from the otherwise closed film channel. <IMAGE>

Description

Motion picture projector with a film channel.

The invention relates to a motion picture projector with a film channel between the supply and take-up spools, in which the film is fed through the device.

In the past, the film web was largely freely accessible on moving picture projectors, so that the film is easily taken out for cutting and gluing into a loop could be. A closed film channel is common with modern projectors, necessary for the automatic threading of the film into the take-up spool is. Thus, in order to cut films, one has to use a film viewer and rewinder.

It is the object of the invention to provide a film projector that despite the closed film channel required for automatic threading allows a loop to be led out in a targeted manner.

According to the invention, this is achieved in that a Switch is provided, by actuating the film from the channel in a loop runs out.

Details of the invention emerge from the subclaims and the description, in which an exemplary embodiment is discussed with reference to the drawing.

The figure shows schematically a motion picture projector with a housing 1, a take-up and congruent supply reel 2, 3, a lamp 4, a Sector diaphragm 5, a gripper 6, an image window 7 and an objective 8. The Film F runs only pushed by the gripper 6 and from the take-up reel 2 over a Friction drawn through the image window 7, deflectors 9 and 10 and the channel walls 11 and 12 formed film channel. The canal is on the outside at the lower front curve limited by a pivotable guide part 13 and an outlet opening 14, 15 appropriate.

According to the solid position / the drawing, the guide part works as a deflector for the beginning of the film coming from the picture window.

However, if the guide part on its handle 13a down in Pivoted the position shown in dashed lines, its end 13b clamps the film F in the channel and gives its other end 13c the outlet opening formed by the boundaries 14 and 15 free so that the film pushed further by the gripper 4 'in one Loop F 'comes out of the device and can be processed. To do this, the Projector turned off. When it is switched on again, the take-up spool pulls 2 Put the film loop back in quickly and the film can continue to be projected or over the rewinding device can be transported back a little, so that the glue point can be viewed.

The invention is of course only to be used in the simple form shown, if there is no toothed drum behind the clamping point. But it should be the case, the drive of the toothed drum with the pivoting movement of the guide part 13 can be disengaged downwards. It may only be engaged again when the loop F 'is fully retracted again.

The guide part can be releasably locked by a not shown be held in the clamped position. It is also useful to spring it downwards, so that when entering the loop end through the narrow opening between the boundary 14 and the guide part end 13c is not kinked, but its side guide part 13 can swivel briefly downwards. Of course, care must be taken to ensure that the free opening is large enough that a loop end can pass through without the To clamp the film over the guide part end 13b.

To further improve the projector, you can also use the swivel movement of the guide part 13 either the transport speed changes or switched to standstill projection after clamping by overtravel will. In order to be able to enlarge the film loop as desired, it is advantageous to when the film is not only from the supply reel, but also from the take-up reel can be pulled off by hand. The former takes place with the grapple raised, as is known; the latter is done without loosening the clamping simply by opening the clamping end 13d 13b of the guide part 13 with a roller / is provided, which in a running direction is locked and rotatable in the other. In the embodiment according to the figure the role should be locked counterclockwise.

Claims (6)

Claims 1. motion picture projector with a film channel between unwinding and Take-up reel in which the film is fed through the device, characterized in that that a switch (13) is provided in the film channel, through whose actuation the film (F) runs out of the channel in a loop (F '). 2. ZufbilXrojektor close to claim 1, characterized in that the Switch (13) is arranged between the picture window (7) and take-up reel (2). 3. motion picture projector according to claim 2, characterized in that the switch (13) consists of an outwardly delimiting a bend of the film channel There is a guide part (13) that is pivotably attached to the projector and has two arms Lever is formed. 4. motion picture projector according to claim 3, characterized in that the arm (13b) of the guide part facing the take-up reel (13) to clamp the film (F) to the inside swiveling channel and that of the picture window (7) facing part (13c) can be pivoted away from the channel to release an outlet opening (-4, 15) is. 5. motion picture projector according to claim 4, characterized in that the guide part (13) is in one piece and is provided with a handle (13a). 6. motion picture projector according to claim 4, characterized in that the film (F) clamping end (13b) of the guide member (13) as a roll with a locked direction of rotation is formed.