Eastman-kodak Company

Daniel J Wooster

Steven D Possanza

Walter Johannes

Donald E Eaton

James K Toner

David R Bendle

Kenneth A Nicolai

Joseph Tooma

Paul K Kelly

A pulsation dampening device designed for horizontal orientation with an internal geometry and a fluid inlet and outlet geometry which minimizes the potential for a preferred flow path thereby allowing for efficient purging of bubbles therefrom. The device includes a generally cylindrical housing containing at least one air chamber. An end cap is attached to the generally cylindrical housing with a diaphragm residing between the end cap and the generally cylindrical housing. The diaphragm normally resides in a generally vertical plane. There is a fluid chamber defined by the diaphragm and the internal surface of the end cap. A horizontally oriented fluid inlet port in the end cap is positioned proximate a bottom peripheral portion of the end cap with the fluid inlet port directed generally perpendicularly to the diaphragm. A fluid outlet port in the end cap is positioned proximate a top peripheral portion of the end cap, the fluid outlet port directed an angle .alpha. relative the diaphragm, the angle .alpha. ranging from about 110.degree. to about 180.degree..

Pulsation dampening device

A device for producing discrete rolls of chilled solutions or dispersions wherein the combination of a distribution bar, an auxiliary weir hopper and a puddle hopper allows for continuous coating of a rotating chiller drum in producing discrete rolls separated from each other by a time gap built into the deposition of the solutions or dispersions from the hopper to the rotating chilled drum.

Device for producing discrete rolls of chilled solutions or dispersions

Photographic emulsions are quickly chilled to a homogeneous, particulate gel by injection of carbon dioxide coolant, while the emulsion is agitated. This process is carried out in a housing having a pair of parallel auger screws to transport emulsion circuitously within the housing. Carbon dioxide coolant is injected through a plurality of nozzles in the housing and is then removed from the housing through a vent line.

Method of chilling a photographic emulsion

The present invention describes a method and apparatus in which solid gelatin chunks are liquefied, tempered, and debubbled in a single operation. The debubbling step is accomplished by evacuating and sealing off the loaded solid reservoir and heat exchanger before initiating the liquefying step. After the vacuum is applied, the gelled chunks are pressed into the heat exchanger, where heat is applied to the gelled chunks of photographic material. This liquefies the gelled chunks of photographic material. When the liquefied product gives a positive pressure at the heat exchanger outlet, the liquefied product is allowed to flow from the heat exchanger. Liquefying and tempering are performed as the solid chunks are pushed through the heat exchanger by the reservoir piston.

Direct coupled degasser and liquefier

The present invention describes a passive membrane degasser device in which solid chunks of photographic materials (15) are pumped past a hydrophobic membrane (10). Air from in between the chunks is forced through the membrane by pump pressure including a screw auger (11) and a vacuum (12) on the outer side of the membrane. The solid chunks of photographic material (15) are then transferred to a liquefier where conventional ultrasonic deaeration is performed. This device causes no sensitometric problems and permits using a continuous liquefaction system without the use of a centrifugal vacuum degasser.

Passive inline membrane degasser and liquefier

A method and apparatus for continuously liquefying a gelled photographic material for coating on a substrate is disclosed. The material is advanced throughout the liquefaction apparatus and on to the substrate coating system as a substantially undisrupted mass. The technique is particularly useful for liquefying small amounts of material at a time, because system hold-up volume and waste is minimized.

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Ontario, NY, United States of America

Daniel J Wooster