Agfa-gevaert Ag

Siegfried Bartel

Ernst Biedermann

Erich Nagel

Bernd Payrhammer

Heinz Rapp

Wolfgang Ermer

Wolfgang Zahn

August Hell

Karl Dreher

Heinz Kolbl

Horst Wildner

Ernst Ismann

Geert Besigk

Normann Scharre

Johann Wurf

Martin Muller

Franz Kramer

A photographic copying machine wherein each of the three color filters comprises several triangular sectors which are pivotable about parallel axes into and from the path of copying light between first positions outside of the path, second positions of full overlap with the path and a finite or infinite number of intermediate positions. The pulleys for the sectors of each filter are rotatable by a discrete endless cord or cable which is further trained over a wheel receiving torque from a crank drive designed to move the sectors into the path of the light beam through progressively greater angles during movement from the second toward the first positions and through progressively smaller angles during movement from the first to the second positions under the action of a reversible stepping motor so that the crank drive can compensate for the lack of linearity between the filtering action of the sectors and the extent to which they project into the path of copying light. A device is provided to limit the extent of movement of sectors from the first toward the second positions so as to ensure that the movement of the sectors is terminated when the respective filter extends across a selected portion of the path for the light beam. A step-down gearing is interposed between the stepping motor and the crank drive.

Apparatus for influencing the color of copying light in photographic

A cassette for winding a band-like photographic material has housing with a slot for introducing the material, a driven winding core having an endless band tensioned by a plurality of rollers and arranged to place the front of the material onto the winding core, and two lever arms pivotable about pivot axes which are parallel to the winding core axis, carrying at their ends guiding rollers and coupled with one another via the endless band, wherein one of the lever arms is connected with a spring element so that the lever arms in an initial condition assume a first position in which said endless band widely embraces the winding spool, and during further winding upon overcoming a dead point of the spring element the lever arms assume a second position in which the endless band is brought out of the region of a greatest possible spool.

Cassette for winding band-like photographic material

Apparatus for positioning sheet-like or strip-shaped originals in a photographic copying machine has a horizontal table with a large window for transmission of copying light and a removable or exchangeable holder on the table. The holder has a lower section which rests on the table and has a first opening in register with the window, an upper section one marginal portion of which is pivoted to the corresponding marginal portion of the lower section, which is movable to and from an operative position of overlap with the lower section and which has a second opening in register with the first opening when the upper section assumes its operative position, and an elastic hold-down device which is affixed to the upper side of the lower section and has an open-sided cutout in register with the first opening. An original is insertable between the hold-down device and the lower section so that a selected portion of the original registers with the cutout and the hold-down device biases three sides of such selected portion against the upper side of the lower section. The upper section has an L-shaped elastic biasing element one leg of which extends downwardly through the second opening and along the open side of the cutout to urge the remaining side of the selected portion of a properly inserted original against the lower section as soon as the upper section is moved to its operative position. The upper section can carry additional biasing elements which bear against the hold-down device along the remaining two closed sides of the cutout to urge the respective sides of the selected portion of the original against the lower section as soon as the upper section assumes its operative position.

Apparatus for positioning originals in photographic copying machines

Apparatus for winding webs of photographic film like onto the hub of a reel in a cassette has a flexible band one end of which is secured to the hub and the other end of which is connected to a coupling unit having a normally closed clamping mechanism for the leader of a web. The leader can be threaded through an inlet opening of the cassette and into the coupling unit when the clamping mechanism is held in open position by a permanent magnet which is installed in the cassette adjacent to the opening. When the hub is rotated in a direction to convolute the band and thereupon the web therearound, the coupling unit is withdrawn from the field to the permanent magnet and is confined in a peripheral recess of the reel. If the web is thereupon unwound, the coupling unit is withdrawn from the recess and is advanced toward the opening so that the magnet opens the clamping mechanism and the latter permits withdrawal of the leader of the web therefrom. The clamping mechanism thereupon remains open until an operator inserts the leader of a fresh web and causes the hub to rotate in a direction to collect the band.

Apparatus for winding or unwinding webs of photosensitive material or

Apparatus for convoluting a web of photographic material onto a rotary core in a lighttight cassette has an elongated channel which is pivotably mounted in the cassette and whose outlet is normally tangential to the peripheral surface of the core. The outlet of the channel is detachably or permanently connected with a flexible or deformable strip-shaped element in the form of a link chain, plastic band, textile band or metallic band which surrounds a substantial part of or the entire peripheral surface of the core. When the leader of a web is introduced into and advanced beyond the outlet of the channel while the core rotates in a direction to convolute the web, the foremost part of the leader penetrates between the core and the flexible element and adheres to the peripheral surface of the core not later than upon the making of approximately two convolutions. During winding, the flexible element insures that the neighboring convolutions of the web on the core are tightly packed against each other. When the web is being withdrawn, the flexible element brakes the web and prevents clockspringing of convoluted material.

Apparatus for convoluting webs onto rotary cores

The longitudinally transported strip passes and is pressed between two cooperating transport rollers. The rotation axes of the two rollers are normally parallel to each other. One roller is swingably mounted about a swing axis which intersects and is perpendicular to the rotation axis of the other, non-swingable roller. Edge sensors are displaced by the lateral edges of the transported strip, when the strip improperly shifts transversely. The force thusly exerted upon an edge sensor is transmitted, via a force-multiplying lever system, to the swingable transport roller, swinging the latter to a position such that the swung transport roller exerts upon a major surface of the transported strip a force whose transverse component is directed opposite to the direction of the improper transverse shift, resulting in automatic recentering.

Automatic counteracting of transverse shift of a longitudinally

A rotary format-mask carrier plate carries a plurality of removably supported format masks for originals to be copied and carries them back and forth between the copying station and a change station, where the masks can be exchanged for others and/or copied originals replaced by not yet copied originals. Downwardly extending projections on the format masks extend through and beyond corresponding openings in the rotary carrier plate. While a format mask is transported from the change station to the copying station, it rests on the carrier plate. When it reaches the copying station, the carrier plate descends an amount such that the projections on the format mask come to rest on correspondingly arranged stationary electromagnets, thereby transferring the weight of the format mask to the stationary electromagnets. The carrier plate drops a further amount, losing physical contact with the format mask at the copying station. In this way, shaking or vibration of the format-mask carrier plate, resulting from laying on and removal of originals and format masks at the change station, cannot be transmitted to the format mask and original presently located at the copying station.

Photographic copying machine with carrier structure _carrying format

A cassette for light-sensitive photographic material which is to be transferred between the cassette and a copying apparatus having one or more doors which can be opened and closed. The cassette has a housing provided with an open side which can be closed by a removable cover, and it also has a wall provided with a slot connectable to an opening of the copying apparatus. A pair of rollers is mounted inwardly adjacent the slot and at least one of these can move towards and away from the other roller between one position in which the rollers define a gap for passage of the photographic material and another position in which the rollers bear upon each other and form a seal against the entry of light from the slot into the cassette. An arrangement is provided which automatically moves the movable roller into the sealing position in response to placement of the cover on the open side and another arrangement automatically moves the movable roller to the gap-defining position in response to closing of the door or doors of the copying apparatus to which the cassette is connected.

Cassette for light-sensitive photographic material

An optical apparatus in which a beam of light is caused to travel along a predetermined direction is provided with a light interrupter for interrupting the beam. The light interrupter includes a light-interrupting component, such as a shutter blade or color filter, and a driving coil connected to the light-interrupting component. The light-interrupting component and driving coil are mounted for pivotal movement about an axis substantially parallel to the beam direction, with the light-interrupting component moving between a light blocking position and an unblocking position. A control circuit is connected to the driving coil for effecting energization of the coil. A magnet arrangement is so positioned as to establish a magnetic field through which the driving coil moves when the driving coil pivots around the pivot axis, with the magnetic field being oriented substantially perpendicular to the direction of movement of the driving coil.

Light interrupter

A web of photographic paper having at its rear side at least one longitudinally extending reference line and at least one row of equally spaced marks which is parallel to the reference line. The reference line and the marks are applied below a coat of liquid-repellent synthetic plastic material. The reference line is scanned by a first photoelectric detector and the row of marks is scanned by a second photoelectric detector which remains in register with the row of marks because the first detector is maintained in register with the reference line by a follow-up control system. The second detector furnishes signals which are used to arrest the advancing rolls for the web in a photoelectric copying machine or subsequent to development of images so that the web is severed during each interval of stoppage. The reference line and the marks are applied simultaneously but prior to the application of photosensitive emulsion to the front side of the web.

Apparatus for scanning a marked web

Apparatus for influencing the color of a beam of printing light in a photographic printer has three sets of coplanar filters which are movable into and from the path of printing light. The filters are mounted on holders in the form of slides, levers or pulleys and are pivotable or reciprocable between inner end positions in which they form a substantially uninterrupted composite filter extending across the entire beam of printing light and partially or completely retracted positions. The filters of each set are movable by separate actuating means which can move all filters of the respective set simultaneously toward or from the inner end positions. such actuating means may employ endless flexible elements, flexible elements of finite length, or rings which have cam slots for followers provided on the holders for the filters of the respective set.

Growing community of inventors

Gauting, Germany

Siegfried Bartel