Eastman-kodak Company

William Arthur Torpey

Eugene H Barbee

Gifford James Lewis

Charles F Puckhaber

Raymond A Ehnot

John Dallas Lang

Method and apparatus are described for setting liquid photographic materials which have been applied as a coating on a support web, while the coated web is moving substantially horizontally with the liquid materials on the underside of the web. Chilling of the liquid materials may be commenced while the web is moving upwards or downwards after coating, but any setting is not permitted to occur until the web has been turned to move substantially horizontally with the liquid materials on the underside. In this way, gravity and surface tension forces act in opposition to one another where the coating lies adjacent surface non-uniformities in the web and tend to retain the uniformity of coating thickness achieved at the time of coating.

Horizontally chill-setting a downwards facing liquid photographic

A method and apparatus is provided for controlling the speed of a slave drive roller in a coating machine. Speed of the slave drive roller at a second coater is regulated by an adaptive gain allowing greater tolerances when not at run speed. That is, in addition to normal speed correction, the system accommodates greater web speed fluctuation during threadup, acceleration, and deceleration. This accommodation may be based on the sensed position of the float roller or, alternatively, on the sensed rate of acceleration/deceleration of the master drive roller.

Method for variably controlling the speed of a slave drive roller in a

A tilt-frame web guiding apparatus for correcting the deviation of a moving web from a true path of the web, in which an edge of the web is parallel to and a predetermined distance from a reference line. An edge sensor senses the edge of the web on an axially movable web exit guide roller, and in response thereto actuates a motor or cylinder for axially moving the web exit guide roller in a direction to maintain the web edge under the sensor. The web exit guide roller is coupled to a pivotally mounted web entry guide roller such that axial movement of the exit guide roller imparts pivotal movement to the entry guide roller for correcting any deviation of the moving web from its true path.

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Rochester, NY, United States of America

William Arthur Torpey