A transparent polymer substrate having an adhesive coating of an optically clear, embossable thermoplastic resin thereon, is an improved medium for recording holographic information.

In a copying apparatus having a multi-stage copy medium magazine, a copy medium feed device includes a feed roller resting on the uppermost one of copy mediums contained in each of copy medium magazine members, a drive source for driving the feed rollers, and means for connecting the drive source to the feed rollers selectively and indispensably.

A thin layer medium for use in molecular diffusion or affinity separation processes is made by bonding to the surface of a hydrated gel sheet a layer of discrete particles of water-sorptive material. The medium may be maintained wet until used or it may be dried for storage and rehydrated before use. The particles may contain a substance having an affinity for a component of the composition being subjected to the separation process. In another embodiment, the particles are embedded within the ba...

Method and medium for the measurement of pancreatic lipase activity in serum. The method involves contacting a serum lipase containing fluid with a medium which enables differential diffusion of the lipase and other constituents in the fluid to take place to provide diagnostically meaningful indicia of lipase activity in the medium. The medium comprises a substrate containing a substance capable of being acted upon by pancreatic lipase, and an agent for inhibiting or impeding the activity of com...

A filter medium for filtering gases to remove odoriferous, noxious substances therefrom, comprises sorbent and catalytic materials in the form of a fine powder admixed with a support material comprising small particles or flakes of an open pore, foam plastic material. The size of the pores in the foam plastic material is preferably greater than the particle size of the sorbent and catalytic material. The small sorbent and catalytic material particles are held in place by entrapment in the open p...

An ink supply transfer medium is disclosed. The medium is of such a construction that marking pressure causes a transfer of colored ink material to any surface with which the medium is then in contact. The medium, usually in sheet form, includes a substrate and an ink supply layer with a dye decoloring layer located therebetween. The ink supply layer includes all of the reactive colorless components required to yield a colored marking ink but the components are separated and provide a potential ...

A labyrinth type shaft seal for turbines, particularly turbines for use in nuclear power plants operating with saturated steam comprises a series of labyrinths located along the shaft in a stuffing box located at each end of the turbine together with three axially spaced annular chambers. The axially innermost chamber is connected to the pipe supplying live steam to the turbine by way of a pipe line containing a regulating valve which reduces and then maintains the pressure of the live steam wit...

A copy medium receiving tray for a copy machine is disclosed. The present invention provides a folding type tray attached to the copying machine, wherein the tray has an opening formed therethrough, or wherein the tray is divided into a fixed or stationary tray, and a rotatable tray so as not to cover a discharge opening even when the rotatable tray is folded. The copying operation may be carried out in a safe and convenient manner without blocking sheets of copy medium at the discharge opening ...

A bidirectional web medium drive for moving a web of material such as a roll of microfilm between two reels consisting of a pair of reversible motors coupled through irreversible drives to corresponding spindles which receive and support each of the film reels. A torque controller is coupled to one of the motors for applying a constant output torque to that motor while a variable speed controller is coupled to the other motor for controlling the output speed of that motor. In one embodiment, a s...

The instant invention concerns a pressure medium control device for controlling the working chambers of a servo-motor, whereby said servo-motor is provided with two control valves which are actuated via actuator means through relative movements between a power input member and a power output member which is connected with said power input member by means of elastic, resilient, especially pre-stressed coupling means, and whereby the servo-motor is in operative connection with the power output mem...