Agfa-gevaert Ag

Karl Dreher

Adolf Fleck

Christian Gotze

Gunther Heidrich

Ernst Ismann

Wolfgang Zahn

Erich Nagel

Ernst Biedermann

Siegfried Bartel

Mathias Pflugbeil

Heinz Kolbl

Horst Wildner

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 When the web is being withdrawn, the flexible element brakes the web and prevents clockspringing of convoluted material.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

A photographic copying machine wherein the leader of a fresh web of photographic paper is automatically threaded through a copying station and thereupon through one or more additional stations whereby the leader advances along an elongated path which is defined by stationary and pivotable guide members. Each pivotable guide member is movable by an electromagnet between an operative position in which it overlies at least a portion of an opening provided by the adjacent stationary guide member or members and an inoperative position in which the respective opening is exposed. Pivotable guide members are provided at a copying station where the web is exposed to printing light and at a feeding station where the web can form one or more loops in a suitable magazine when the respective pivotable guide member is moved to its inoperative position. One or more pivotable guide members can be yieldably retained in the respective operative positions by elastic or yieldably mounted locking bolts at least one of which can be disengaged from the respective pivotable guide member by an electromagnet or in response to the application of a predetermined force which acts against the respective pivotable guide members in a direction to move it to the inoperative position.

Photographic copying machine

Apparatus for collecting webs of photographic paper issuing from a photographic copying machine has a magazine which is attachable to the copying machine and contains a wheel having a slotted periphery for introduction of the leader of a web by way of a channel defined by a guide which is pivotably mounted in the magazine. The channel extends radially of the wheel during introduction of the leader so that the latter can enter the interior of the wheel. The wheel is thereupon driven to convolute the web about it periphery and to automatically propel the guide to a position in which the channel is tangential to the wheel. The guide is then intercepted and held against pivotal movement in a direction to locate the channel radially of the wheel, and the guide has a roller which rests on the outermost convolution of the roll of paper which accumulates on the wheel. The intercepting device is a spring-biased lever which allows the guide to locate the channel radially of the wheel in response to attachment of the magazine to the copying machine.

Apparatus for collecting webs of photographic paper or the like

Growing community of inventors

Munich, Germany

Karl Dreher